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); 65143bede5SJeff Mahoney static void btrfs_destroy_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); 2255f39d397SChris Mason ret = add_extent_mapping(em_tree, em); 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 24119c00ddcSChris Mason u32 btrfs_csum_data(struct btrfs_root *root, 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)); 27719c00ddcSChris Mason crc = btrfs_csum_data(root, 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); 616ce9adaa5SChris Mason 61785d4e461SChris Mason btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), 61885d4e461SChris Mason eb, found_level); 6194008c04aSChris Mason 620ce9adaa5SChris Mason ret = csum_tree_block(root, eb, 1); 621a826d6dcSJosef Bacik if (ret) { 622f188591eSChris Mason ret = -EIO; 623a826d6dcSJosef Bacik goto err; 624a826d6dcSJosef Bacik } 625a826d6dcSJosef Bacik 626a826d6dcSJosef Bacik /* 627a826d6dcSJosef Bacik * If this is a leaf block and it is corrupt, set the corrupt bit so 628a826d6dcSJosef Bacik * that we don't try and read the other copies of this block, just 629a826d6dcSJosef Bacik * return -EIO. 630a826d6dcSJosef Bacik */ 631a826d6dcSJosef Bacik if (found_level == 0 && check_leaf(root, eb)) { 632a826d6dcSJosef Bacik set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 633a826d6dcSJosef Bacik ret = -EIO; 634a826d6dcSJosef Bacik } 635ce9adaa5SChris Mason 6360b32f4bbSJosef Bacik if (!ret) 6370b32f4bbSJosef Bacik set_extent_buffer_uptodate(eb); 638ce9adaa5SChris Mason err: 6394bb31e92SArne Jansen if (test_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) { 6404bb31e92SArne Jansen clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags); 6414bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, ret); 6424bb31e92SArne Jansen } 6434bb31e92SArne Jansen 64453b381b3SDavid Woodhouse if (ret) { 64553b381b3SDavid Woodhouse /* 64653b381b3SDavid Woodhouse * our io error hook is going to dec the io pages 64753b381b3SDavid Woodhouse * again, we have to make sure it has something 64853b381b3SDavid Woodhouse * to decrement 64953b381b3SDavid Woodhouse */ 65053b381b3SDavid Woodhouse atomic_inc(&eb->io_pages); 6510b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 65253b381b3SDavid Woodhouse } 6530b32f4bbSJosef Bacik free_extent_buffer(eb); 654ce9adaa5SChris Mason out: 655f188591eSChris Mason return ret; 656ce9adaa5SChris Mason } 657ce9adaa5SChris Mason 658ea466794SJosef Bacik static int btree_io_failed_hook(struct page *page, int failed_mirror) 6594bb31e92SArne Jansen { 6604bb31e92SArne Jansen struct extent_buffer *eb; 6614bb31e92SArne Jansen struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 6624bb31e92SArne Jansen 6634f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 664ea466794SJosef Bacik set_bit(EXTENT_BUFFER_IOERR, &eb->bflags); 6655cf1ab56SJosef Bacik eb->read_mirror = failed_mirror; 66653b381b3SDavid Woodhouse atomic_dec(&eb->io_pages); 667ea466794SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 6684bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, -EIO); 6694bb31e92SArne Jansen return -EIO; /* we fixed nothing */ 6704bb31e92SArne Jansen } 6714bb31e92SArne Jansen 672ce9adaa5SChris Mason static void end_workqueue_bio(struct bio *bio, int err) 673ce9adaa5SChris Mason { 674ce9adaa5SChris Mason struct end_io_wq *end_io_wq = bio->bi_private; 675ce9adaa5SChris Mason struct btrfs_fs_info *fs_info; 676ce9adaa5SChris Mason 677ce9adaa5SChris Mason fs_info = end_io_wq->info; 678ce9adaa5SChris Mason end_io_wq->error = err; 6798b712842SChris Mason end_io_wq->work.func = end_workqueue_fn; 6808b712842SChris Mason end_io_wq->work.flags = 0; 681d20f7043SChris Mason 6827b6d91daSChristoph Hellwig if (bio->bi_rw & REQ_WRITE) { 68353b381b3SDavid Woodhouse if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) 684cad321adSChris Mason btrfs_queue_worker(&fs_info->endio_meta_write_workers, 685cad321adSChris Mason &end_io_wq->work); 68653b381b3SDavid Woodhouse else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) 6870cb59c99SJosef Bacik btrfs_queue_worker(&fs_info->endio_freespace_worker, 6880cb59c99SJosef Bacik &end_io_wq->work); 68953b381b3SDavid Woodhouse else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 69053b381b3SDavid Woodhouse btrfs_queue_worker(&fs_info->endio_raid56_workers, 69153b381b3SDavid Woodhouse &end_io_wq->work); 692cad321adSChris Mason else 693e6dcd2dcSChris Mason btrfs_queue_worker(&fs_info->endio_write_workers, 694e6dcd2dcSChris Mason &end_io_wq->work); 695d20f7043SChris Mason } else { 69653b381b3SDavid Woodhouse if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 69753b381b3SDavid Woodhouse btrfs_queue_worker(&fs_info->endio_raid56_workers, 69853b381b3SDavid Woodhouse &end_io_wq->work); 69953b381b3SDavid Woodhouse else if (end_io_wq->metadata) 700d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_meta_workers, 701d20f7043SChris Mason &end_io_wq->work); 702e6dcd2dcSChris Mason else 703d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_workers, 704d20f7043SChris Mason &end_io_wq->work); 705d20f7043SChris Mason } 706ce9adaa5SChris Mason } 707ce9adaa5SChris Mason 7080cb59c99SJosef Bacik /* 7090cb59c99SJosef Bacik * For the metadata arg you want 7100cb59c99SJosef Bacik * 7110cb59c99SJosef Bacik * 0 - if data 7120cb59c99SJosef Bacik * 1 - if normal metadta 7130cb59c99SJosef Bacik * 2 - if writing to the free space cache area 71453b381b3SDavid Woodhouse * 3 - raid parity work 7150cb59c99SJosef Bacik */ 71622c59948SChris Mason int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, 71722c59948SChris Mason int metadata) 7180b86a832SChris Mason { 719ce9adaa5SChris Mason struct end_io_wq *end_io_wq; 720ce9adaa5SChris Mason end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); 721ce9adaa5SChris Mason if (!end_io_wq) 722ce9adaa5SChris Mason return -ENOMEM; 723ce9adaa5SChris Mason 724ce9adaa5SChris Mason end_io_wq->private = bio->bi_private; 725ce9adaa5SChris Mason end_io_wq->end_io = bio->bi_end_io; 72622c59948SChris Mason end_io_wq->info = info; 727ce9adaa5SChris Mason end_io_wq->error = 0; 728ce9adaa5SChris Mason end_io_wq->bio = bio; 72922c59948SChris Mason end_io_wq->metadata = metadata; 730ce9adaa5SChris Mason 731ce9adaa5SChris Mason bio->bi_private = end_io_wq; 732ce9adaa5SChris Mason bio->bi_end_io = end_workqueue_bio; 73322c59948SChris Mason return 0; 73422c59948SChris Mason } 73522c59948SChris Mason 736b64a2851SChris Mason unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) 7374854ddd0SChris Mason { 7384854ddd0SChris Mason unsigned long limit = min_t(unsigned long, 7394854ddd0SChris Mason info->workers.max_workers, 7404854ddd0SChris Mason info->fs_devices->open_devices); 7414854ddd0SChris Mason return 256 * limit; 7424854ddd0SChris Mason } 7434854ddd0SChris Mason 7444a69a410SChris Mason static void run_one_async_start(struct btrfs_work *work) 7454a69a410SChris Mason { 7464a69a410SChris Mason struct async_submit_bio *async; 74779787eaaSJeff Mahoney int ret; 7484a69a410SChris Mason 7494a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 75079787eaaSJeff Mahoney ret = async->submit_bio_start(async->inode, async->rw, async->bio, 751eaf25d93SChris Mason async->mirror_num, async->bio_flags, 752eaf25d93SChris Mason async->bio_offset); 75379787eaaSJeff Mahoney if (ret) 75479787eaaSJeff Mahoney async->error = ret; 7554a69a410SChris Mason } 7564a69a410SChris Mason 7574a69a410SChris Mason static void run_one_async_done(struct btrfs_work *work) 7588b712842SChris Mason { 7598b712842SChris Mason struct btrfs_fs_info *fs_info; 7608b712842SChris Mason struct async_submit_bio *async; 7614854ddd0SChris Mason int limit; 7628b712842SChris Mason 7638b712842SChris Mason async = container_of(work, struct async_submit_bio, work); 7648b712842SChris Mason fs_info = BTRFS_I(async->inode)->root->fs_info; 7654854ddd0SChris Mason 766b64a2851SChris Mason limit = btrfs_async_submit_limit(fs_info); 7674854ddd0SChris Mason limit = limit * 2 / 3; 7684854ddd0SChris Mason 76966657b31SJosef Bacik if (atomic_dec_return(&fs_info->nr_async_submits) < limit && 770b64a2851SChris Mason waitqueue_active(&fs_info->async_submit_wait)) 7714854ddd0SChris Mason wake_up(&fs_info->async_submit_wait); 7724854ddd0SChris Mason 77379787eaaSJeff Mahoney /* If an error occured we just want to clean up the bio and move on */ 77479787eaaSJeff Mahoney if (async->error) { 77579787eaaSJeff Mahoney bio_endio(async->bio, async->error); 77679787eaaSJeff Mahoney return; 77779787eaaSJeff Mahoney } 77879787eaaSJeff Mahoney 7794a69a410SChris Mason async->submit_bio_done(async->inode, async->rw, async->bio, 780eaf25d93SChris Mason async->mirror_num, async->bio_flags, 781eaf25d93SChris Mason async->bio_offset); 7824a69a410SChris Mason } 7834a69a410SChris Mason 7844a69a410SChris Mason static void run_one_async_free(struct btrfs_work *work) 7854a69a410SChris Mason { 7864a69a410SChris Mason struct async_submit_bio *async; 7874a69a410SChris Mason 7884a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 7898b712842SChris Mason kfree(async); 7908b712842SChris Mason } 7918b712842SChris Mason 79244b8bd7eSChris Mason int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, 79344b8bd7eSChris Mason int rw, struct bio *bio, int mirror_num, 794c8b97818SChris Mason unsigned long bio_flags, 795eaf25d93SChris Mason u64 bio_offset, 7964a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start, 7974a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done) 79844b8bd7eSChris Mason { 79944b8bd7eSChris Mason struct async_submit_bio *async; 80044b8bd7eSChris Mason 80144b8bd7eSChris Mason async = kmalloc(sizeof(*async), GFP_NOFS); 80244b8bd7eSChris Mason if (!async) 80344b8bd7eSChris Mason return -ENOMEM; 80444b8bd7eSChris Mason 80544b8bd7eSChris Mason async->inode = inode; 80644b8bd7eSChris Mason async->rw = rw; 80744b8bd7eSChris Mason async->bio = bio; 80844b8bd7eSChris Mason async->mirror_num = mirror_num; 8094a69a410SChris Mason async->submit_bio_start = submit_bio_start; 8104a69a410SChris Mason async->submit_bio_done = submit_bio_done; 8114a69a410SChris Mason 8124a69a410SChris Mason async->work.func = run_one_async_start; 8134a69a410SChris Mason async->work.ordered_func = run_one_async_done; 8144a69a410SChris Mason async->work.ordered_free = run_one_async_free; 8154a69a410SChris Mason 8168b712842SChris Mason async->work.flags = 0; 817c8b97818SChris Mason async->bio_flags = bio_flags; 818eaf25d93SChris Mason async->bio_offset = bio_offset; 8198c8bee1dSChris Mason 82079787eaaSJeff Mahoney async->error = 0; 82179787eaaSJeff Mahoney 822cb03c743SChris Mason atomic_inc(&fs_info->nr_async_submits); 823d313d7a3SChris Mason 8247b6d91daSChristoph Hellwig if (rw & REQ_SYNC) 825d313d7a3SChris Mason btrfs_set_work_high_prio(&async->work); 826d313d7a3SChris Mason 8278b712842SChris Mason btrfs_queue_worker(&fs_info->workers, &async->work); 8289473f16cSChris Mason 829771ed689SChris Mason while (atomic_read(&fs_info->async_submit_draining) && 830771ed689SChris Mason atomic_read(&fs_info->nr_async_submits)) { 831771ed689SChris Mason wait_event(fs_info->async_submit_wait, 832771ed689SChris Mason (atomic_read(&fs_info->nr_async_submits) == 0)); 833771ed689SChris Mason } 834771ed689SChris Mason 83544b8bd7eSChris Mason return 0; 83644b8bd7eSChris Mason } 83744b8bd7eSChris Mason 838ce3ed71aSChris Mason static int btree_csum_one_bio(struct bio *bio) 839ce3ed71aSChris Mason { 840ce3ed71aSChris Mason struct bio_vec *bvec = bio->bi_io_vec; 841ce3ed71aSChris Mason int bio_index = 0; 842ce3ed71aSChris Mason struct btrfs_root *root; 84379787eaaSJeff Mahoney int ret = 0; 844ce3ed71aSChris Mason 845ce3ed71aSChris Mason WARN_ON(bio->bi_vcnt <= 0); 846ce3ed71aSChris Mason while (bio_index < bio->bi_vcnt) { 847ce3ed71aSChris Mason root = BTRFS_I(bvec->bv_page->mapping->host)->root; 84879787eaaSJeff Mahoney ret = csum_dirty_buffer(root, bvec->bv_page); 84979787eaaSJeff Mahoney if (ret) 85079787eaaSJeff Mahoney break; 851ce3ed71aSChris Mason bio_index++; 852ce3ed71aSChris Mason bvec++; 853ce3ed71aSChris Mason } 85479787eaaSJeff Mahoney return ret; 855ce3ed71aSChris Mason } 856ce3ed71aSChris Mason 8574a69a410SChris Mason static int __btree_submit_bio_start(struct inode *inode, int rw, 8584a69a410SChris Mason struct bio *bio, int mirror_num, 859eaf25d93SChris Mason unsigned long bio_flags, 860eaf25d93SChris Mason u64 bio_offset) 86122c59948SChris Mason { 8628b712842SChris Mason /* 8638b712842SChris Mason * when we're called for a write, we're already in the async 8645443be45SChris Mason * submission context. Just jump into btrfs_map_bio 8658b712842SChris Mason */ 86679787eaaSJeff Mahoney return btree_csum_one_bio(bio); 86722c59948SChris Mason } 86822c59948SChris Mason 8694a69a410SChris Mason static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, 870eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 871eaf25d93SChris Mason u64 bio_offset) 8724a69a410SChris Mason { 87361891923SStefan Behrens int ret; 87461891923SStefan Behrens 8758b712842SChris Mason /* 8764a69a410SChris Mason * when we're called for a write, we're already in the async 8774a69a410SChris Mason * submission context. Just jump into btrfs_map_bio 8788b712842SChris Mason */ 87961891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); 88061891923SStefan Behrens if (ret) 88161891923SStefan Behrens bio_endio(bio, ret); 88261891923SStefan Behrens return ret; 8830b86a832SChris Mason } 8840b86a832SChris Mason 885de0022b9SJosef Bacik static int check_async_write(struct inode *inode, unsigned long bio_flags) 886de0022b9SJosef Bacik { 887de0022b9SJosef Bacik if (bio_flags & EXTENT_BIO_TREE_LOG) 888de0022b9SJosef Bacik return 0; 889de0022b9SJosef Bacik #ifdef CONFIG_X86 890de0022b9SJosef Bacik if (cpu_has_xmm4_2) 891de0022b9SJosef Bacik return 0; 892de0022b9SJosef Bacik #endif 893de0022b9SJosef Bacik return 1; 894de0022b9SJosef Bacik } 895de0022b9SJosef Bacik 89644b8bd7eSChris Mason static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, 897eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 898eaf25d93SChris Mason u64 bio_offset) 89944b8bd7eSChris Mason { 900de0022b9SJosef Bacik int async = check_async_write(inode, bio_flags); 9014a69a410SChris Mason int ret; 902cad321adSChris Mason 9037b6d91daSChristoph Hellwig if (!(rw & REQ_WRITE)) { 904cad321adSChris Mason /* 905cad321adSChris Mason * called for a read, do the setup so that checksum validation 906cad321adSChris Mason * can happen in the async kernel threads 907cad321adSChris Mason */ 908f3f266abSChris Mason ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, 909f3f266abSChris Mason bio, 1); 9101d4284bdSChris Mason if (ret) 91161891923SStefan Behrens goto out_w_error; 91261891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 9136f3577bdSChris Mason mirror_num, 0); 914de0022b9SJosef Bacik } else if (!async) { 915de0022b9SJosef Bacik ret = btree_csum_one_bio(bio); 916de0022b9SJosef Bacik if (ret) 91761891923SStefan Behrens goto out_w_error; 91861891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 919de0022b9SJosef Bacik mirror_num, 0); 92061891923SStefan Behrens } else { 921cad321adSChris Mason /* 92261891923SStefan Behrens * kthread helpers are used to submit writes so that 92361891923SStefan Behrens * checksumming can happen in parallel across all CPUs 924cad321adSChris Mason */ 92561891923SStefan Behrens ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, 926c8b97818SChris Mason inode, rw, bio, mirror_num, 0, 927eaf25d93SChris Mason bio_offset, 9284a69a410SChris Mason __btree_submit_bio_start, 9294a69a410SChris Mason __btree_submit_bio_done); 93044b8bd7eSChris Mason } 93144b8bd7eSChris Mason 93261891923SStefan Behrens if (ret) { 93361891923SStefan Behrens out_w_error: 93461891923SStefan Behrens bio_endio(bio, ret); 93561891923SStefan Behrens } 93661891923SStefan Behrens return ret; 93761891923SStefan Behrens } 93861891923SStefan Behrens 9393dd1462eSJan Beulich #ifdef CONFIG_MIGRATION 940784b4e29SChris Mason static int btree_migratepage(struct address_space *mapping, 941a6bc32b8SMel Gorman struct page *newpage, struct page *page, 942a6bc32b8SMel Gorman enum migrate_mode mode) 943784b4e29SChris Mason { 944784b4e29SChris Mason /* 945784b4e29SChris Mason * we can't safely write a btree page from here, 946784b4e29SChris Mason * we haven't done the locking hook 947784b4e29SChris Mason */ 948784b4e29SChris Mason if (PageDirty(page)) 949784b4e29SChris Mason return -EAGAIN; 950784b4e29SChris Mason /* 951784b4e29SChris Mason * Buffers may be managed in a filesystem specific way. 952784b4e29SChris Mason * We must have no buffers or drop them. 953784b4e29SChris Mason */ 954784b4e29SChris Mason if (page_has_private(page) && 955784b4e29SChris Mason !try_to_release_page(page, GFP_KERNEL)) 956784b4e29SChris Mason return -EAGAIN; 957a6bc32b8SMel Gorman return migrate_page(mapping, newpage, page, mode); 958784b4e29SChris Mason } 9593dd1462eSJan Beulich #endif 960784b4e29SChris Mason 9610da5468fSChris Mason 9620da5468fSChris Mason static int btree_writepages(struct address_space *mapping, 9630da5468fSChris Mason struct writeback_control *wbc) 9640da5468fSChris Mason { 965d1310b2eSChris Mason struct extent_io_tree *tree; 966e2d84521SMiao Xie struct btrfs_fs_info *fs_info; 967e2d84521SMiao Xie int ret; 968e2d84521SMiao Xie 969d1310b2eSChris Mason tree = &BTRFS_I(mapping->host)->io_tree; 970d8d5f3e1SChris Mason if (wbc->sync_mode == WB_SYNC_NONE) { 971448d640bSChris Mason 972448d640bSChris Mason if (wbc->for_kupdate) 973448d640bSChris Mason return 0; 974448d640bSChris Mason 975e2d84521SMiao Xie fs_info = BTRFS_I(mapping->host)->root->fs_info; 976b9473439SChris Mason /* this is a bit racy, but that's ok */ 977e2d84521SMiao Xie ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, 978e2d84521SMiao Xie BTRFS_DIRTY_METADATA_THRESH); 979e2d84521SMiao Xie if (ret < 0) 980793955bcSChris Mason return 0; 981793955bcSChris Mason } 9820b32f4bbSJosef Bacik return btree_write_cache_pages(mapping, wbc); 9830da5468fSChris Mason } 9840da5468fSChris Mason 985b2950863SChristoph Hellwig static int btree_readpage(struct file *file, struct page *page) 9865f39d397SChris Mason { 987d1310b2eSChris Mason struct extent_io_tree *tree; 988d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 9898ddc7d9cSJan Schmidt return extent_read_full_page(tree, page, btree_get_extent, 0); 9905f39d397SChris Mason } 9915f39d397SChris Mason 99270dec807SChris Mason static int btree_releasepage(struct page *page, gfp_t gfp_flags) 9935f39d397SChris Mason { 99498509cfcSChris Mason if (PageWriteback(page) || PageDirty(page)) 99598509cfcSChris Mason return 0; 9960c4e538bSDavid Sterba /* 9970c4e538bSDavid Sterba * We need to mask out eg. __GFP_HIGHMEM and __GFP_DMA32 as we're doing 9980c4e538bSDavid Sterba * slab allocation from alloc_extent_state down the callchain where 9990c4e538bSDavid Sterba * it'd hit a BUG_ON as those flags are not allowed. 10000c4e538bSDavid Sterba */ 10010c4e538bSDavid Sterba gfp_flags &= ~GFP_SLAB_BUG_MASK; 10020c4e538bSDavid Sterba 10033083ee2eSJosef Bacik return try_release_extent_buffer(page, gfp_flags); 1004d98237b3SChris Mason } 1005d98237b3SChris Mason 10065f39d397SChris Mason static void btree_invalidatepage(struct page *page, unsigned long offset) 1007d98237b3SChris Mason { 1008d1310b2eSChris Mason struct extent_io_tree *tree; 1009d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 10105f39d397SChris Mason extent_invalidatepage(tree, page, offset); 10115f39d397SChris Mason btree_releasepage(page, GFP_NOFS); 10129ad6b7bcSChris Mason if (PagePrivate(page)) { 1013d397712bSChris Mason printk(KERN_WARNING "btrfs warning page private not zero " 1014d397712bSChris Mason "on page %llu\n", (unsigned long long)page_offset(page)); 10159ad6b7bcSChris Mason ClearPagePrivate(page); 10169ad6b7bcSChris Mason set_page_private(page, 0); 10179ad6b7bcSChris Mason page_cache_release(page); 10189ad6b7bcSChris Mason } 1019d98237b3SChris Mason } 1020d98237b3SChris Mason 10210b32f4bbSJosef Bacik static int btree_set_page_dirty(struct page *page) 10220b32f4bbSJosef Bacik { 1023bb146eb2SJosef Bacik #ifdef DEBUG 10240b32f4bbSJosef Bacik struct extent_buffer *eb; 10250b32f4bbSJosef Bacik 10260b32f4bbSJosef Bacik BUG_ON(!PagePrivate(page)); 10270b32f4bbSJosef Bacik eb = (struct extent_buffer *)page->private; 10280b32f4bbSJosef Bacik BUG_ON(!eb); 10290b32f4bbSJosef Bacik BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); 10300b32f4bbSJosef Bacik BUG_ON(!atomic_read(&eb->refs)); 10310b32f4bbSJosef Bacik btrfs_assert_tree_locked(eb); 1032bb146eb2SJosef Bacik #endif 10330b32f4bbSJosef Bacik return __set_page_dirty_nobuffers(page); 10340b32f4bbSJosef Bacik } 10350b32f4bbSJosef Bacik 10367f09410bSAlexey Dobriyan static const struct address_space_operations btree_aops = { 1037d98237b3SChris Mason .readpage = btree_readpage, 10380da5468fSChris Mason .writepages = btree_writepages, 10395f39d397SChris Mason .releasepage = btree_releasepage, 10405f39d397SChris Mason .invalidatepage = btree_invalidatepage, 10415a92bc88SChris Mason #ifdef CONFIG_MIGRATION 1042784b4e29SChris Mason .migratepage = btree_migratepage, 10435a92bc88SChris Mason #endif 10440b32f4bbSJosef Bacik .set_page_dirty = btree_set_page_dirty, 1045d98237b3SChris Mason }; 1046123abc88SChris Mason 1047ca7a79adSChris Mason int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, 1048ca7a79adSChris Mason u64 parent_transid) 1049090d1875SChris Mason { 10505f39d397SChris Mason struct extent_buffer *buf = NULL; 10515f39d397SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 1052de428b63SChris Mason int ret = 0; 1053090d1875SChris Mason 1054db94535dSChris Mason buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 10555f39d397SChris Mason if (!buf) 1056090d1875SChris Mason return 0; 1057d1310b2eSChris Mason read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, 1058bb82ab88SArne Jansen buf, 0, WAIT_NONE, btree_get_extent, 0); 10595f39d397SChris Mason free_extent_buffer(buf); 1060de428b63SChris Mason return ret; 1061090d1875SChris Mason } 1062090d1875SChris Mason 1063ab0fff03SArne Jansen int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, 1064ab0fff03SArne Jansen int mirror_num, struct extent_buffer **eb) 1065ab0fff03SArne Jansen { 1066ab0fff03SArne Jansen struct extent_buffer *buf = NULL; 1067ab0fff03SArne Jansen struct inode *btree_inode = root->fs_info->btree_inode; 1068ab0fff03SArne Jansen struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; 1069ab0fff03SArne Jansen int ret; 1070ab0fff03SArne Jansen 1071ab0fff03SArne Jansen buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 1072ab0fff03SArne Jansen if (!buf) 1073ab0fff03SArne Jansen return 0; 1074ab0fff03SArne Jansen 1075ab0fff03SArne Jansen set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); 1076ab0fff03SArne Jansen 1077ab0fff03SArne Jansen ret = read_extent_buffer_pages(io_tree, buf, 0, WAIT_PAGE_LOCK, 1078ab0fff03SArne Jansen btree_get_extent, mirror_num); 1079ab0fff03SArne Jansen if (ret) { 1080ab0fff03SArne Jansen free_extent_buffer(buf); 1081ab0fff03SArne Jansen return ret; 1082ab0fff03SArne Jansen } 1083ab0fff03SArne Jansen 1084ab0fff03SArne Jansen if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { 1085ab0fff03SArne Jansen free_extent_buffer(buf); 1086ab0fff03SArne Jansen return -EIO; 10870b32f4bbSJosef Bacik } else if (extent_buffer_uptodate(buf)) { 1088ab0fff03SArne Jansen *eb = buf; 1089ab0fff03SArne Jansen } else { 1090ab0fff03SArne Jansen free_extent_buffer(buf); 1091ab0fff03SArne Jansen } 1092ab0fff03SArne Jansen return 0; 1093ab0fff03SArne Jansen } 1094ab0fff03SArne Jansen 10950999df54SChris Mason struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, 10960999df54SChris Mason u64 bytenr, u32 blocksize) 10970999df54SChris Mason { 10980999df54SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 10990999df54SChris Mason struct extent_buffer *eb; 11000999df54SChris Mason eb = find_extent_buffer(&BTRFS_I(btree_inode)->io_tree, 1101f09d1f60SDavid Sterba bytenr, blocksize); 11020999df54SChris Mason return eb; 11030999df54SChris Mason } 11040999df54SChris Mason 11050999df54SChris Mason struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, 11060999df54SChris Mason u64 bytenr, u32 blocksize) 11070999df54SChris Mason { 11080999df54SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 11090999df54SChris Mason struct extent_buffer *eb; 11100999df54SChris Mason 11110999df54SChris Mason eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree, 1112727011e0SChris Mason bytenr, blocksize); 11130999df54SChris Mason return eb; 11140999df54SChris Mason } 11150999df54SChris Mason 11160999df54SChris Mason 1117e02119d5SChris Mason int btrfs_write_tree_block(struct extent_buffer *buf) 1118e02119d5SChris Mason { 1119727011e0SChris Mason return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, 11208aa38c31SChristoph Hellwig buf->start + buf->len - 1); 1121e02119d5SChris Mason } 1122e02119d5SChris Mason 1123e02119d5SChris Mason int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) 1124e02119d5SChris Mason { 1125727011e0SChris Mason return filemap_fdatawait_range(buf->pages[0]->mapping, 11268aa38c31SChristoph Hellwig buf->start, buf->start + buf->len - 1); 1127e02119d5SChris Mason } 1128e02119d5SChris Mason 1129db94535dSChris Mason struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, 1130ca7a79adSChris Mason u32 blocksize, u64 parent_transid) 1131e20d96d6SChris Mason { 11325f39d397SChris Mason struct extent_buffer *buf = NULL; 113319c00ddcSChris Mason int ret; 113419c00ddcSChris Mason 1135db94535dSChris Mason buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 11365f39d397SChris Mason if (!buf) 1137d98237b3SChris Mason return NULL; 1138e4204dedSChris Mason 1139ca7a79adSChris Mason ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 11405f39d397SChris Mason return buf; 1141ce9adaa5SChris Mason 1142eb60ceacSChris Mason } 1143eb60ceacSChris Mason 1144d5c13f92SJeff Mahoney void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, 11455f39d397SChris Mason struct extent_buffer *buf) 1146ed2ff2cbSChris Mason { 1147e2d84521SMiao Xie struct btrfs_fs_info *fs_info = root->fs_info; 1148e2d84521SMiao Xie 114955c69072SChris Mason if (btrfs_header_generation(buf) == 1150e2d84521SMiao Xie fs_info->running_transaction->transid) { 1151b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 1152b4ce94deSChris Mason 1153b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { 1154e2d84521SMiao Xie __percpu_counter_add(&fs_info->dirty_metadata_bytes, 1155e2d84521SMiao Xie -buf->len, 1156e2d84521SMiao Xie fs_info->dirty_metadata_batch); 1157b9473439SChris Mason /* ugh, clear_extent_buffer_dirty needs to lock the page */ 1158b9473439SChris Mason btrfs_set_lock_blocking(buf); 11590b32f4bbSJosef Bacik clear_extent_buffer_dirty(buf); 1160925baeddSChris Mason } 11615f39d397SChris Mason } 1162ed7b63ebSJosef Bacik } 11635f39d397SChris Mason 1164143bede5SJeff Mahoney static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, 116587ee04ebSChris Mason u32 stripesize, struct btrfs_root *root, 11669f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 1167e20d96d6SChris Mason u64 objectid) 1168d97e63b6SChris Mason { 1169cfaa7295SChris Mason root->node = NULL; 1170a28ec197SChris Mason root->commit_root = NULL; 1171db94535dSChris Mason root->sectorsize = sectorsize; 1172db94535dSChris Mason root->nodesize = nodesize; 1173db94535dSChris Mason root->leafsize = leafsize; 117487ee04ebSChris Mason root->stripesize = stripesize; 1175123abc88SChris Mason root->ref_cows = 0; 11760b86a832SChris Mason root->track_dirty = 0; 1177c71bf099SYan, Zheng root->in_radix = 0; 1178d68fc57bSYan, Zheng root->orphan_item_inserted = 0; 1179d68fc57bSYan, Zheng root->orphan_cleanup_state = 0; 11800b86a832SChris Mason 11810f7d52f4SChris Mason root->objectid = objectid; 11820f7d52f4SChris Mason root->last_trans = 0; 118313a8a7c8SYan, Zheng root->highest_objectid = 0; 118458176a96SJosef Bacik root->name = NULL; 11856bef4d31SEric Paris root->inode_tree = RB_ROOT; 118616cdcec7SMiao Xie INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); 1187f0486c68SYan, Zheng root->block_rsv = NULL; 1188d68fc57bSYan, Zheng root->orphan_block_rsv = NULL; 11890b86a832SChris Mason 11900b86a832SChris Mason INIT_LIST_HEAD(&root->dirty_list); 11915d4f98a2SYan Zheng INIT_LIST_HEAD(&root->root_list); 11922ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[0]); 11932ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[1]); 1194d68fc57bSYan, Zheng spin_lock_init(&root->orphan_lock); 11955d4f98a2SYan Zheng spin_lock_init(&root->inode_lock); 1196f0486c68SYan, Zheng spin_lock_init(&root->accounting_lock); 11972ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[0]); 11982ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[1]); 1199a2135011SChris Mason mutex_init(&root->objectid_mutex); 1200e02119d5SChris Mason mutex_init(&root->log_mutex); 12017237f183SYan Zheng init_waitqueue_head(&root->log_writer_wait); 12027237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[0]); 12037237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[1]); 12047237f183SYan Zheng atomic_set(&root->log_commit[0], 0); 12057237f183SYan Zheng atomic_set(&root->log_commit[1], 0); 12067237f183SYan Zheng atomic_set(&root->log_writers, 0); 12072ecb7923SMiao Xie atomic_set(&root->log_batch, 0); 12088a35d95fSJosef Bacik atomic_set(&root->orphan_inodes, 0); 12097237f183SYan Zheng root->log_transid = 0; 1210257c62e1SChris Mason root->last_log_commit = 0; 1211d0c803c4SChris Mason extent_io_tree_init(&root->dirty_log_pages, 1212f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 1213017e5369SChris Mason 12143768f368SChris Mason memset(&root->root_key, 0, sizeof(root->root_key)); 12153768f368SChris Mason memset(&root->root_item, 0, sizeof(root->root_item)); 12166702ed49SChris Mason memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); 121758176a96SJosef Bacik memset(&root->root_kobj, 0, sizeof(root->root_kobj)); 12183f157a2fSChris Mason root->defrag_trans_start = fs_info->generation; 121958176a96SJosef Bacik init_completion(&root->kobj_unregister); 12206702ed49SChris Mason root->defrag_running = 0; 12214d775673SChris Mason root->root_key.objectid = objectid; 12220ee5dc67SAl Viro root->anon_dev = 0; 12238ea05e3aSAlexander Block 12245f3ab90aSAnand Jain spin_lock_init(&root->root_item_lock); 12253768f368SChris Mason } 12263768f368SChris Mason 1227200a5c17SJeff Mahoney static int __must_check find_and_setup_root(struct btrfs_root *tree_root, 12289f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 12299f5fae2fSChris Mason u64 objectid, 1230e20d96d6SChris Mason struct btrfs_root *root) 12313768f368SChris Mason { 12323768f368SChris Mason int ret; 1233db94535dSChris Mason u32 blocksize; 123484234f3aSYan Zheng u64 generation; 12353768f368SChris Mason 1236db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 123787ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 123887ee04ebSChris Mason root, fs_info, objectid); 12393768f368SChris Mason ret = btrfs_find_last_root(tree_root, objectid, 12403768f368SChris Mason &root->root_item, &root->root_key); 12414df27c4dSYan, Zheng if (ret > 0) 12424df27c4dSYan, Zheng return -ENOENT; 1243200a5c17SJeff Mahoney else if (ret < 0) 1244200a5c17SJeff Mahoney return ret; 12453768f368SChris Mason 124684234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1247db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1248af31f5e5SChris Mason root->commit_root = NULL; 1249db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 125084234f3aSYan Zheng blocksize, generation); 1251b9fab919SChris Mason if (!root->node || !btrfs_buffer_uptodate(root->node, generation, 0)) { 125268433b73SChris Mason free_extent_buffer(root->node); 1253af31f5e5SChris Mason root->node = NULL; 125468433b73SChris Mason return -EIO; 125568433b73SChris Mason } 12564df27c4dSYan, Zheng root->commit_root = btrfs_root_node(root); 1257d97e63b6SChris Mason return 0; 1258d97e63b6SChris Mason } 1259d97e63b6SChris Mason 1260f84a8bd6SAl Viro static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info) 12616f07e42eSAl Viro { 12626f07e42eSAl Viro struct btrfs_root *root = kzalloc(sizeof(*root), GFP_NOFS); 12636f07e42eSAl Viro if (root) 12646f07e42eSAl Viro root->fs_info = fs_info; 12656f07e42eSAl Viro return root; 12666f07e42eSAl Viro } 12676f07e42eSAl Viro 126820897f5cSArne Jansen struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, 126920897f5cSArne Jansen struct btrfs_fs_info *fs_info, 127020897f5cSArne Jansen u64 objectid) 127120897f5cSArne Jansen { 127220897f5cSArne Jansen struct extent_buffer *leaf; 127320897f5cSArne Jansen struct btrfs_root *tree_root = fs_info->tree_root; 127420897f5cSArne Jansen struct btrfs_root *root; 127520897f5cSArne Jansen struct btrfs_key key; 127620897f5cSArne Jansen int ret = 0; 127720897f5cSArne Jansen u64 bytenr; 127820897f5cSArne Jansen 127920897f5cSArne Jansen root = btrfs_alloc_root(fs_info); 128020897f5cSArne Jansen if (!root) 128120897f5cSArne Jansen return ERR_PTR(-ENOMEM); 128220897f5cSArne Jansen 128320897f5cSArne Jansen __setup_root(tree_root->nodesize, tree_root->leafsize, 128420897f5cSArne Jansen tree_root->sectorsize, tree_root->stripesize, 128520897f5cSArne Jansen root, fs_info, objectid); 128620897f5cSArne Jansen root->root_key.objectid = objectid; 128720897f5cSArne Jansen root->root_key.type = BTRFS_ROOT_ITEM_KEY; 128820897f5cSArne Jansen root->root_key.offset = 0; 128920897f5cSArne Jansen 129020897f5cSArne Jansen leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 129120897f5cSArne Jansen 0, objectid, NULL, 0, 0, 0); 129220897f5cSArne Jansen if (IS_ERR(leaf)) { 129320897f5cSArne Jansen ret = PTR_ERR(leaf); 129420897f5cSArne Jansen goto fail; 129520897f5cSArne Jansen } 129620897f5cSArne Jansen 129720897f5cSArne Jansen bytenr = leaf->start; 129820897f5cSArne Jansen memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 129920897f5cSArne Jansen btrfs_set_header_bytenr(leaf, leaf->start); 130020897f5cSArne Jansen btrfs_set_header_generation(leaf, trans->transid); 130120897f5cSArne Jansen btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 130220897f5cSArne Jansen btrfs_set_header_owner(leaf, objectid); 130320897f5cSArne Jansen root->node = leaf; 130420897f5cSArne Jansen 130520897f5cSArne Jansen write_extent_buffer(leaf, fs_info->fsid, 130620897f5cSArne Jansen (unsigned long)btrfs_header_fsid(leaf), 130720897f5cSArne Jansen BTRFS_FSID_SIZE); 130820897f5cSArne Jansen write_extent_buffer(leaf, fs_info->chunk_tree_uuid, 130920897f5cSArne Jansen (unsigned long)btrfs_header_chunk_tree_uuid(leaf), 131020897f5cSArne Jansen BTRFS_UUID_SIZE); 131120897f5cSArne Jansen btrfs_mark_buffer_dirty(leaf); 131220897f5cSArne Jansen 131320897f5cSArne Jansen root->commit_root = btrfs_root_node(root); 131420897f5cSArne Jansen root->track_dirty = 1; 131520897f5cSArne Jansen 131620897f5cSArne Jansen 131720897f5cSArne Jansen root->root_item.flags = 0; 131820897f5cSArne Jansen root->root_item.byte_limit = 0; 131920897f5cSArne Jansen btrfs_set_root_bytenr(&root->root_item, leaf->start); 132020897f5cSArne Jansen btrfs_set_root_generation(&root->root_item, trans->transid); 132120897f5cSArne Jansen btrfs_set_root_level(&root->root_item, 0); 132220897f5cSArne Jansen btrfs_set_root_refs(&root->root_item, 1); 132320897f5cSArne Jansen btrfs_set_root_used(&root->root_item, leaf->len); 132420897f5cSArne Jansen btrfs_set_root_last_snapshot(&root->root_item, 0); 132520897f5cSArne Jansen btrfs_set_root_dirid(&root->root_item, 0); 132620897f5cSArne Jansen root->root_item.drop_level = 0; 132720897f5cSArne Jansen 132820897f5cSArne Jansen key.objectid = objectid; 132920897f5cSArne Jansen key.type = BTRFS_ROOT_ITEM_KEY; 133020897f5cSArne Jansen key.offset = 0; 133120897f5cSArne Jansen ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); 133220897f5cSArne Jansen if (ret) 133320897f5cSArne Jansen goto fail; 133420897f5cSArne Jansen 133520897f5cSArne Jansen btrfs_tree_unlock(leaf); 133620897f5cSArne Jansen 133720897f5cSArne Jansen fail: 133820897f5cSArne Jansen if (ret) 133920897f5cSArne Jansen return ERR_PTR(ret); 134020897f5cSArne Jansen 134120897f5cSArne Jansen return root; 134220897f5cSArne Jansen } 134320897f5cSArne Jansen 13447237f183SYan Zheng static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, 1345e02119d5SChris Mason struct btrfs_fs_info *fs_info) 13460f7d52f4SChris Mason { 13470f7d52f4SChris Mason struct btrfs_root *root; 13480f7d52f4SChris Mason struct btrfs_root *tree_root = fs_info->tree_root; 13497237f183SYan Zheng struct extent_buffer *leaf; 1350e02119d5SChris Mason 13516f07e42eSAl Viro root = btrfs_alloc_root(fs_info); 1352e02119d5SChris Mason if (!root) 13537237f183SYan Zheng return ERR_PTR(-ENOMEM); 1354e02119d5SChris Mason 1355e02119d5SChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 1356e02119d5SChris Mason tree_root->sectorsize, tree_root->stripesize, 1357e02119d5SChris Mason root, fs_info, BTRFS_TREE_LOG_OBJECTID); 1358e02119d5SChris Mason 1359e02119d5SChris Mason root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 1360e02119d5SChris Mason root->root_key.type = BTRFS_ROOT_ITEM_KEY; 1361e02119d5SChris Mason root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 13627237f183SYan Zheng /* 13637237f183SYan Zheng * log trees do not get reference counted because they go away 13647237f183SYan Zheng * before a real commit is actually done. They do store pointers 13657237f183SYan Zheng * to file data extents, and those reference counts still get 13667237f183SYan Zheng * updated (along with back refs to the log tree). 13677237f183SYan Zheng */ 1368e02119d5SChris Mason root->ref_cows = 0; 1369e02119d5SChris Mason 13705d4f98a2SYan Zheng leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, 137166d7e7f0SArne Jansen BTRFS_TREE_LOG_OBJECTID, NULL, 13725581a51aSJan Schmidt 0, 0, 0); 13737237f183SYan Zheng if (IS_ERR(leaf)) { 13747237f183SYan Zheng kfree(root); 13757237f183SYan Zheng return ERR_CAST(leaf); 13767237f183SYan Zheng } 1377e02119d5SChris Mason 13785d4f98a2SYan Zheng memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 13795d4f98a2SYan Zheng btrfs_set_header_bytenr(leaf, leaf->start); 13805d4f98a2SYan Zheng btrfs_set_header_generation(leaf, trans->transid); 13815d4f98a2SYan Zheng btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 13825d4f98a2SYan Zheng btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); 13837237f183SYan Zheng root->node = leaf; 1384e02119d5SChris Mason 1385e02119d5SChris Mason write_extent_buffer(root->node, root->fs_info->fsid, 1386e02119d5SChris Mason (unsigned long)btrfs_header_fsid(root->node), 1387e02119d5SChris Mason BTRFS_FSID_SIZE); 1388e02119d5SChris Mason btrfs_mark_buffer_dirty(root->node); 1389e02119d5SChris Mason btrfs_tree_unlock(root->node); 13907237f183SYan Zheng return root; 13917237f183SYan Zheng } 13927237f183SYan Zheng 13937237f183SYan Zheng int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 13947237f183SYan Zheng struct btrfs_fs_info *fs_info) 13957237f183SYan Zheng { 13967237f183SYan Zheng struct btrfs_root *log_root; 13977237f183SYan Zheng 13987237f183SYan Zheng log_root = alloc_log_tree(trans, fs_info); 13997237f183SYan Zheng if (IS_ERR(log_root)) 14007237f183SYan Zheng return PTR_ERR(log_root); 14017237f183SYan Zheng WARN_ON(fs_info->log_root_tree); 14027237f183SYan Zheng fs_info->log_root_tree = log_root; 14037237f183SYan Zheng return 0; 14047237f183SYan Zheng } 14057237f183SYan Zheng 14067237f183SYan Zheng int btrfs_add_log_tree(struct btrfs_trans_handle *trans, 14077237f183SYan Zheng struct btrfs_root *root) 14087237f183SYan Zheng { 14097237f183SYan Zheng struct btrfs_root *log_root; 14107237f183SYan Zheng struct btrfs_inode_item *inode_item; 14117237f183SYan Zheng 14127237f183SYan Zheng log_root = alloc_log_tree(trans, root->fs_info); 14137237f183SYan Zheng if (IS_ERR(log_root)) 14147237f183SYan Zheng return PTR_ERR(log_root); 14157237f183SYan Zheng 14167237f183SYan Zheng log_root->last_trans = trans->transid; 14177237f183SYan Zheng log_root->root_key.offset = root->root_key.objectid; 14187237f183SYan Zheng 14197237f183SYan Zheng inode_item = &log_root->root_item.inode; 14207237f183SYan Zheng inode_item->generation = cpu_to_le64(1); 14217237f183SYan Zheng inode_item->size = cpu_to_le64(3); 14227237f183SYan Zheng inode_item->nlink = cpu_to_le32(1); 14237237f183SYan Zheng inode_item->nbytes = cpu_to_le64(root->leafsize); 14247237f183SYan Zheng inode_item->mode = cpu_to_le32(S_IFDIR | 0755); 14257237f183SYan Zheng 14265d4f98a2SYan Zheng btrfs_set_root_node(&log_root->root_item, log_root->node); 14277237f183SYan Zheng 14287237f183SYan Zheng WARN_ON(root->log_root); 14297237f183SYan Zheng root->log_root = log_root; 14307237f183SYan Zheng root->log_transid = 0; 1431257c62e1SChris Mason root->last_log_commit = 0; 1432e02119d5SChris Mason return 0; 1433e02119d5SChris Mason } 1434e02119d5SChris Mason 1435e02119d5SChris Mason struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, 1436e02119d5SChris Mason struct btrfs_key *location) 1437e02119d5SChris Mason { 1438e02119d5SChris Mason struct btrfs_root *root; 1439e02119d5SChris Mason struct btrfs_fs_info *fs_info = tree_root->fs_info; 14400f7d52f4SChris Mason struct btrfs_path *path; 14415f39d397SChris Mason struct extent_buffer *l; 144284234f3aSYan Zheng u64 generation; 1443db94535dSChris Mason u32 blocksize; 14440f7d52f4SChris Mason int ret = 0; 14458ea05e3aSAlexander Block int slot; 14460f7d52f4SChris Mason 14476f07e42eSAl Viro root = btrfs_alloc_root(fs_info); 14480cf6c620SChris Mason if (!root) 14490f7d52f4SChris Mason return ERR_PTR(-ENOMEM); 14500f7d52f4SChris Mason if (location->offset == (u64)-1) { 1451db94535dSChris Mason ret = find_and_setup_root(tree_root, fs_info, 14520f7d52f4SChris Mason location->objectid, root); 14530f7d52f4SChris Mason if (ret) { 14540f7d52f4SChris Mason kfree(root); 14550f7d52f4SChris Mason return ERR_PTR(ret); 14560f7d52f4SChris Mason } 145713a8a7c8SYan, Zheng goto out; 14580f7d52f4SChris Mason } 14590f7d52f4SChris Mason 1460db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 146187ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 146287ee04ebSChris Mason root, fs_info, location->objectid); 14630f7d52f4SChris Mason 14640f7d52f4SChris Mason path = btrfs_alloc_path(); 1465db5b493aSTsutomu Itoh if (!path) { 1466db5b493aSTsutomu Itoh kfree(root); 1467db5b493aSTsutomu Itoh return ERR_PTR(-ENOMEM); 1468db5b493aSTsutomu Itoh } 14690f7d52f4SChris Mason ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); 147013a8a7c8SYan, Zheng if (ret == 0) { 14715f39d397SChris Mason l = path->nodes[0]; 14728ea05e3aSAlexander Block slot = path->slots[0]; 14738ea05e3aSAlexander Block btrfs_read_root_item(tree_root, l, slot, &root->root_item); 147444b36eb2SYan Zheng memcpy(&root->root_key, location, sizeof(*location)); 147513a8a7c8SYan, Zheng } 14760f7d52f4SChris Mason btrfs_free_path(path); 14770f7d52f4SChris Mason if (ret) { 14785e540f77STsutomu Itoh kfree(root); 147913a8a7c8SYan, Zheng if (ret > 0) 148013a8a7c8SYan, Zheng ret = -ENOENT; 14810f7d52f4SChris Mason return ERR_PTR(ret); 14820f7d52f4SChris Mason } 148313a8a7c8SYan, Zheng 148484234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1485db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1486db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 148784234f3aSYan Zheng blocksize, generation); 14885d4f98a2SYan Zheng root->commit_root = btrfs_root_node(root); 148979787eaaSJeff Mahoney BUG_ON(!root->node); /* -ENOMEM */ 149013a8a7c8SYan, Zheng out: 149108fe4db1SLi Zefan if (location->objectid != BTRFS_TREE_LOG_OBJECTID) { 14920f7d52f4SChris Mason root->ref_cows = 1; 149308fe4db1SLi Zefan btrfs_check_and_init_root_item(&root->root_item); 149408fe4db1SLi Zefan } 149513a8a7c8SYan, Zheng 14965eda7b5eSChris Mason return root; 14975eda7b5eSChris Mason } 14985eda7b5eSChris Mason 1499edbd8d4eSChris Mason struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, 1500edbd8d4eSChris Mason struct btrfs_key *location) 15015eda7b5eSChris Mason { 15025eda7b5eSChris Mason struct btrfs_root *root; 15035eda7b5eSChris Mason int ret; 15045eda7b5eSChris Mason 1505edbd8d4eSChris Mason if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) 1506edbd8d4eSChris Mason return fs_info->tree_root; 1507edbd8d4eSChris Mason if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) 1508edbd8d4eSChris Mason return fs_info->extent_root; 15098f18cf13SChris Mason if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) 15108f18cf13SChris Mason return fs_info->chunk_root; 15118f18cf13SChris Mason if (location->objectid == BTRFS_DEV_TREE_OBJECTID) 15128f18cf13SChris Mason return fs_info->dev_root; 15130403e47eSYan Zheng if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) 15140403e47eSYan Zheng return fs_info->csum_root; 1515bcef60f2SArne Jansen if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) 1516bcef60f2SArne Jansen return fs_info->quota_root ? fs_info->quota_root : 1517bcef60f2SArne Jansen ERR_PTR(-ENOENT); 15184df27c4dSYan, Zheng again: 15194df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 15205eda7b5eSChris Mason root = radix_tree_lookup(&fs_info->fs_roots_radix, 15215eda7b5eSChris Mason (unsigned long)location->objectid); 15224df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 15235eda7b5eSChris Mason if (root) 15245eda7b5eSChris Mason return root; 15255eda7b5eSChris Mason 1526e02119d5SChris Mason root = btrfs_read_fs_root_no_radix(fs_info->tree_root, location); 15275eda7b5eSChris Mason if (IS_ERR(root)) 15285eda7b5eSChris Mason return root; 15293394e160SChris Mason 1530581bb050SLi Zefan root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); 1531581bb050SLi Zefan root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), 1532581bb050SLi Zefan GFP_NOFS); 153335a30d7cSDavid Sterba if (!root->free_ino_pinned || !root->free_ino_ctl) { 153435a30d7cSDavid Sterba ret = -ENOMEM; 1535581bb050SLi Zefan goto fail; 153635a30d7cSDavid Sterba } 1537581bb050SLi Zefan 1538581bb050SLi Zefan btrfs_init_free_ino_ctl(root); 1539581bb050SLi Zefan mutex_init(&root->fs_commit_mutex); 1540581bb050SLi Zefan spin_lock_init(&root->cache_lock); 1541581bb050SLi Zefan init_waitqueue_head(&root->cache_wait); 1542581bb050SLi Zefan 15430ee5dc67SAl Viro ret = get_anon_bdev(&root->anon_dev); 1544ac08aedfSChris Mason if (ret) 1545ac08aedfSChris Mason goto fail; 15463394e160SChris Mason 1547d68fc57bSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) { 1548d68fc57bSYan, Zheng ret = -ENOENT; 1549d68fc57bSYan, Zheng goto fail; 1550d68fc57bSYan, Zheng } 1551d68fc57bSYan, Zheng 1552d68fc57bSYan, Zheng ret = btrfs_find_orphan_item(fs_info->tree_root, location->objectid); 1553d68fc57bSYan, Zheng if (ret < 0) 1554d68fc57bSYan, Zheng goto fail; 1555d68fc57bSYan, Zheng if (ret == 0) 1556d68fc57bSYan, Zheng root->orphan_item_inserted = 1; 1557d68fc57bSYan, Zheng 15584df27c4dSYan, Zheng ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); 15594df27c4dSYan, Zheng if (ret) 15604df27c4dSYan, Zheng goto fail; 15614df27c4dSYan, Zheng 15624df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 15632619ba1fSChris Mason ret = radix_tree_insert(&fs_info->fs_roots_radix, 15642619ba1fSChris Mason (unsigned long)root->root_key.objectid, 15650f7d52f4SChris Mason root); 1566d68fc57bSYan, Zheng if (ret == 0) 15674df27c4dSYan, Zheng root->in_radix = 1; 1568d68fc57bSYan, Zheng 15694df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 15704df27c4dSYan, Zheng radix_tree_preload_end(); 15710f7d52f4SChris Mason if (ret) { 15724df27c4dSYan, Zheng if (ret == -EEXIST) { 15734df27c4dSYan, Zheng free_fs_root(root); 15744df27c4dSYan, Zheng goto again; 15750f7d52f4SChris Mason } 15764df27c4dSYan, Zheng goto fail; 15774df27c4dSYan, Zheng } 15784df27c4dSYan, Zheng 1579edbd8d4eSChris Mason ret = btrfs_find_dead_roots(fs_info->tree_root, 15805d4f98a2SYan Zheng root->root_key.objectid); 15814df27c4dSYan, Zheng WARN_ON(ret); 1582edbd8d4eSChris Mason return root; 15834df27c4dSYan, Zheng fail: 15844df27c4dSYan, Zheng free_fs_root(root); 15854df27c4dSYan, Zheng return ERR_PTR(ret); 1586edbd8d4eSChris Mason } 1587edbd8d4eSChris Mason 158804160088SChris Mason static int btrfs_congested_fn(void *congested_data, int bdi_bits) 158904160088SChris Mason { 159004160088SChris Mason struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; 159104160088SChris Mason int ret = 0; 159204160088SChris Mason struct btrfs_device *device; 159304160088SChris Mason struct backing_dev_info *bdi; 1594b7967db7SChris Mason 15951f78160cSXiao Guangrong rcu_read_lock(); 15961f78160cSXiao Guangrong list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { 1597dfe25020SChris Mason if (!device->bdev) 1598dfe25020SChris Mason continue; 159904160088SChris Mason bdi = blk_get_backing_dev_info(device->bdev); 160004160088SChris Mason if (bdi && bdi_congested(bdi, bdi_bits)) { 160104160088SChris Mason ret = 1; 160204160088SChris Mason break; 160304160088SChris Mason } 160404160088SChris Mason } 16051f78160cSXiao Guangrong rcu_read_unlock(); 160604160088SChris Mason return ret; 160704160088SChris Mason } 160804160088SChris Mason 160938b66988SChris Mason /* 1610ad081f14SJens Axboe * If this fails, caller must call bdi_destroy() to get rid of the 1611ad081f14SJens Axboe * bdi again. 1612ad081f14SJens Axboe */ 161304160088SChris Mason static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) 161404160088SChris Mason { 1615ad081f14SJens Axboe int err; 1616ad081f14SJens Axboe 1617ad081f14SJens Axboe bdi->capabilities = BDI_CAP_MAP_COPY; 1618e6d086d8SJens Axboe err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY); 1619ad081f14SJens Axboe if (err) 1620ad081f14SJens Axboe return err; 1621ad081f14SJens Axboe 16224575c9ccSChris Mason bdi->ra_pages = default_backing_dev_info.ra_pages; 162304160088SChris Mason bdi->congested_fn = btrfs_congested_fn; 162404160088SChris Mason bdi->congested_data = info; 162504160088SChris Mason return 0; 162604160088SChris Mason } 162704160088SChris Mason 16288b712842SChris Mason /* 16298b712842SChris Mason * called by the kthread helper functions to finally call the bio end_io 16308b712842SChris Mason * functions. This is where read checksum verification actually happens 16318b712842SChris Mason */ 16328b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work) 1633ce9adaa5SChris Mason { 1634ce9adaa5SChris Mason struct bio *bio; 16358b712842SChris Mason struct end_io_wq *end_io_wq; 16368b712842SChris Mason struct btrfs_fs_info *fs_info; 1637ce9adaa5SChris Mason int error; 1638ce9adaa5SChris Mason 16398b712842SChris Mason end_io_wq = container_of(work, struct end_io_wq, work); 1640ce9adaa5SChris Mason bio = end_io_wq->bio; 16418b712842SChris Mason fs_info = end_io_wq->info; 16428b712842SChris Mason 1643ce9adaa5SChris Mason error = end_io_wq->error; 1644ce9adaa5SChris Mason bio->bi_private = end_io_wq->private; 1645ce9adaa5SChris Mason bio->bi_end_io = end_io_wq->end_io; 1646ce9adaa5SChris Mason kfree(end_io_wq); 1647ce9adaa5SChris Mason bio_endio(bio, error); 1648ce9adaa5SChris Mason } 164944b8bd7eSChris Mason 1650a74a4b97SChris Mason static int cleaner_kthread(void *arg) 1651a74a4b97SChris Mason { 1652a74a4b97SChris Mason struct btrfs_root *root = arg; 1653a74a4b97SChris Mason 1654a74a4b97SChris Mason do { 165576dda93cSYan, Zheng if (!(root->fs_info->sb->s_flags & MS_RDONLY) && 165676dda93cSYan, Zheng mutex_trylock(&root->fs_info->cleaner_mutex)) { 165724bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 1658a74a4b97SChris Mason btrfs_clean_old_snapshots(root); 1659a74a4b97SChris Mason mutex_unlock(&root->fs_info->cleaner_mutex); 16604cb5300bSChris Mason btrfs_run_defrag_inodes(root->fs_info); 166176dda93cSYan, Zheng } 1662a74a4b97SChris Mason 1663a0acae0eSTejun Heo if (!try_to_freeze()) { 1664a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 16658929ecfaSYan, Zheng if (!kthread_should_stop()) 1666a74a4b97SChris Mason schedule(); 1667a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1668a74a4b97SChris Mason } 1669a74a4b97SChris Mason } while (!kthread_should_stop()); 1670a74a4b97SChris Mason return 0; 1671a74a4b97SChris Mason } 1672a74a4b97SChris Mason 1673a74a4b97SChris Mason static int transaction_kthread(void *arg) 1674a74a4b97SChris Mason { 1675a74a4b97SChris Mason struct btrfs_root *root = arg; 1676a74a4b97SChris Mason struct btrfs_trans_handle *trans; 1677a74a4b97SChris Mason struct btrfs_transaction *cur; 16788929ecfaSYan, Zheng u64 transid; 1679a74a4b97SChris Mason unsigned long now; 1680a74a4b97SChris Mason unsigned long delay; 1681914b2007SJan Kara bool cannot_commit; 1682a74a4b97SChris Mason 1683a74a4b97SChris Mason do { 1684914b2007SJan Kara cannot_commit = false; 1685a74a4b97SChris Mason delay = HZ * 30; 1686a74a4b97SChris Mason mutex_lock(&root->fs_info->transaction_kthread_mutex); 1687a74a4b97SChris Mason 1688a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 1689a74a4b97SChris Mason cur = root->fs_info->running_transaction; 1690a74a4b97SChris Mason if (!cur) { 1691a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1692a74a4b97SChris Mason goto sleep; 1693a74a4b97SChris Mason } 169431153d81SYan Zheng 1695a74a4b97SChris Mason now = get_seconds(); 16968929ecfaSYan, Zheng if (!cur->blocked && 16978929ecfaSYan, Zheng (now < cur->start_time || now - cur->start_time < 30)) { 1698a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1699a74a4b97SChris Mason delay = HZ * 5; 1700a74a4b97SChris Mason goto sleep; 1701a74a4b97SChris Mason } 17028929ecfaSYan, Zheng transid = cur->transid; 1703a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 170456bec294SChris Mason 170579787eaaSJeff Mahoney /* If the file system is aborted, this will always fail. */ 1706354aa0fbSMiao Xie trans = btrfs_attach_transaction(root); 1707914b2007SJan Kara if (IS_ERR(trans)) { 1708354aa0fbSMiao Xie if (PTR_ERR(trans) != -ENOENT) 1709914b2007SJan Kara cannot_commit = true; 171079787eaaSJeff Mahoney goto sleep; 1711914b2007SJan Kara } 17128929ecfaSYan, Zheng if (transid == trans->transid) { 171379787eaaSJeff Mahoney btrfs_commit_transaction(trans, root); 17148929ecfaSYan, Zheng } else { 17158929ecfaSYan, Zheng btrfs_end_transaction(trans, root); 17168929ecfaSYan, Zheng } 1717a74a4b97SChris Mason sleep: 1718a74a4b97SChris Mason wake_up_process(root->fs_info->cleaner_kthread); 1719a74a4b97SChris Mason mutex_unlock(&root->fs_info->transaction_kthread_mutex); 1720a74a4b97SChris Mason 1721a0acae0eSTejun Heo if (!try_to_freeze()) { 1722a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 17238929ecfaSYan, Zheng if (!kthread_should_stop() && 1724914b2007SJan Kara (!btrfs_transaction_blocked(root->fs_info) || 1725914b2007SJan Kara cannot_commit)) 1726a74a4b97SChris Mason schedule_timeout(delay); 1727a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1728a74a4b97SChris Mason } 1729a74a4b97SChris Mason } while (!kthread_should_stop()); 1730a74a4b97SChris Mason return 0; 1731a74a4b97SChris Mason } 1732a74a4b97SChris Mason 1733af31f5e5SChris Mason /* 1734af31f5e5SChris Mason * this will find the highest generation in the array of 1735af31f5e5SChris Mason * root backups. The index of the highest array is returned, 1736af31f5e5SChris Mason * or -1 if we can't find anything. 1737af31f5e5SChris Mason * 1738af31f5e5SChris Mason * We check to make sure the array is valid by comparing the 1739af31f5e5SChris Mason * generation of the latest root in the array with the generation 1740af31f5e5SChris Mason * in the super block. If they don't match we pitch it. 1741af31f5e5SChris Mason */ 1742af31f5e5SChris Mason static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) 1743af31f5e5SChris Mason { 1744af31f5e5SChris Mason u64 cur; 1745af31f5e5SChris Mason int newest_index = -1; 1746af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1747af31f5e5SChris Mason int i; 1748af31f5e5SChris Mason 1749af31f5e5SChris Mason for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 1750af31f5e5SChris Mason root_backup = info->super_copy->super_roots + i; 1751af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1752af31f5e5SChris Mason if (cur == newest_gen) 1753af31f5e5SChris Mason newest_index = i; 1754af31f5e5SChris Mason } 1755af31f5e5SChris Mason 1756af31f5e5SChris Mason /* check to see if we actually wrapped around */ 1757af31f5e5SChris Mason if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { 1758af31f5e5SChris Mason root_backup = info->super_copy->super_roots; 1759af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1760af31f5e5SChris Mason if (cur == newest_gen) 1761af31f5e5SChris Mason newest_index = 0; 1762af31f5e5SChris Mason } 1763af31f5e5SChris Mason return newest_index; 1764af31f5e5SChris Mason } 1765af31f5e5SChris Mason 1766af31f5e5SChris Mason 1767af31f5e5SChris Mason /* 1768af31f5e5SChris Mason * find the oldest backup so we know where to store new entries 1769af31f5e5SChris Mason * in the backup array. This will set the backup_root_index 1770af31f5e5SChris Mason * field in the fs_info struct 1771af31f5e5SChris Mason */ 1772af31f5e5SChris Mason static void find_oldest_super_backup(struct btrfs_fs_info *info, 1773af31f5e5SChris Mason u64 newest_gen) 1774af31f5e5SChris Mason { 1775af31f5e5SChris Mason int newest_index = -1; 1776af31f5e5SChris Mason 1777af31f5e5SChris Mason newest_index = find_newest_super_backup(info, newest_gen); 1778af31f5e5SChris Mason /* if there was garbage in there, just move along */ 1779af31f5e5SChris Mason if (newest_index == -1) { 1780af31f5e5SChris Mason info->backup_root_index = 0; 1781af31f5e5SChris Mason } else { 1782af31f5e5SChris Mason info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; 1783af31f5e5SChris Mason } 1784af31f5e5SChris Mason } 1785af31f5e5SChris Mason 1786af31f5e5SChris Mason /* 1787af31f5e5SChris Mason * copy all the root pointers into the super backup array. 1788af31f5e5SChris Mason * this will bump the backup pointer by one when it is 1789af31f5e5SChris Mason * done 1790af31f5e5SChris Mason */ 1791af31f5e5SChris Mason static void backup_super_roots(struct btrfs_fs_info *info) 1792af31f5e5SChris Mason { 1793af31f5e5SChris Mason int next_backup; 1794af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1795af31f5e5SChris Mason int last_backup; 1796af31f5e5SChris Mason 1797af31f5e5SChris Mason next_backup = info->backup_root_index; 1798af31f5e5SChris Mason last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % 1799af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1800af31f5e5SChris Mason 1801af31f5e5SChris Mason /* 1802af31f5e5SChris Mason * just overwrite the last backup if we're at the same generation 1803af31f5e5SChris Mason * this happens only at umount 1804af31f5e5SChris Mason */ 1805af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + last_backup; 1806af31f5e5SChris Mason if (btrfs_backup_tree_root_gen(root_backup) == 1807af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)) 1808af31f5e5SChris Mason next_backup = last_backup; 1809af31f5e5SChris Mason 1810af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + next_backup; 1811af31f5e5SChris Mason 1812af31f5e5SChris Mason /* 1813af31f5e5SChris Mason * make sure all of our padding and empty slots get zero filled 1814af31f5e5SChris Mason * regardless of which ones we use today 1815af31f5e5SChris Mason */ 1816af31f5e5SChris Mason memset(root_backup, 0, sizeof(*root_backup)); 1817af31f5e5SChris Mason 1818af31f5e5SChris Mason info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; 1819af31f5e5SChris Mason 1820af31f5e5SChris Mason btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); 1821af31f5e5SChris Mason btrfs_set_backup_tree_root_gen(root_backup, 1822af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)); 1823af31f5e5SChris Mason 1824af31f5e5SChris Mason btrfs_set_backup_tree_root_level(root_backup, 1825af31f5e5SChris Mason btrfs_header_level(info->tree_root->node)); 1826af31f5e5SChris Mason 1827af31f5e5SChris Mason btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); 1828af31f5e5SChris Mason btrfs_set_backup_chunk_root_gen(root_backup, 1829af31f5e5SChris Mason btrfs_header_generation(info->chunk_root->node)); 1830af31f5e5SChris Mason btrfs_set_backup_chunk_root_level(root_backup, 1831af31f5e5SChris Mason btrfs_header_level(info->chunk_root->node)); 1832af31f5e5SChris Mason 1833af31f5e5SChris Mason btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); 1834af31f5e5SChris Mason btrfs_set_backup_extent_root_gen(root_backup, 1835af31f5e5SChris Mason btrfs_header_generation(info->extent_root->node)); 1836af31f5e5SChris Mason btrfs_set_backup_extent_root_level(root_backup, 1837af31f5e5SChris Mason btrfs_header_level(info->extent_root->node)); 1838af31f5e5SChris Mason 18397c7e82a7SChris Mason /* 18407c7e82a7SChris Mason * we might commit during log recovery, which happens before we set 18417c7e82a7SChris Mason * the fs_root. Make sure it is valid before we fill it in. 18427c7e82a7SChris Mason */ 18437c7e82a7SChris Mason if (info->fs_root && info->fs_root->node) { 18447c7e82a7SChris Mason btrfs_set_backup_fs_root(root_backup, 18457c7e82a7SChris Mason info->fs_root->node->start); 1846af31f5e5SChris Mason btrfs_set_backup_fs_root_gen(root_backup, 1847af31f5e5SChris Mason btrfs_header_generation(info->fs_root->node)); 1848af31f5e5SChris Mason btrfs_set_backup_fs_root_level(root_backup, 1849af31f5e5SChris Mason btrfs_header_level(info->fs_root->node)); 18507c7e82a7SChris Mason } 1851af31f5e5SChris Mason 1852af31f5e5SChris Mason btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); 1853af31f5e5SChris Mason btrfs_set_backup_dev_root_gen(root_backup, 1854af31f5e5SChris Mason btrfs_header_generation(info->dev_root->node)); 1855af31f5e5SChris Mason btrfs_set_backup_dev_root_level(root_backup, 1856af31f5e5SChris Mason btrfs_header_level(info->dev_root->node)); 1857af31f5e5SChris Mason 1858af31f5e5SChris Mason btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); 1859af31f5e5SChris Mason btrfs_set_backup_csum_root_gen(root_backup, 1860af31f5e5SChris Mason btrfs_header_generation(info->csum_root->node)); 1861af31f5e5SChris Mason btrfs_set_backup_csum_root_level(root_backup, 1862af31f5e5SChris Mason btrfs_header_level(info->csum_root->node)); 1863af31f5e5SChris Mason 1864af31f5e5SChris Mason btrfs_set_backup_total_bytes(root_backup, 1865af31f5e5SChris Mason btrfs_super_total_bytes(info->super_copy)); 1866af31f5e5SChris Mason btrfs_set_backup_bytes_used(root_backup, 1867af31f5e5SChris Mason btrfs_super_bytes_used(info->super_copy)); 1868af31f5e5SChris Mason btrfs_set_backup_num_devices(root_backup, 1869af31f5e5SChris Mason btrfs_super_num_devices(info->super_copy)); 1870af31f5e5SChris Mason 1871af31f5e5SChris Mason /* 1872af31f5e5SChris Mason * if we don't copy this out to the super_copy, it won't get remembered 1873af31f5e5SChris Mason * for the next commit 1874af31f5e5SChris Mason */ 1875af31f5e5SChris Mason memcpy(&info->super_copy->super_roots, 1876af31f5e5SChris Mason &info->super_for_commit->super_roots, 1877af31f5e5SChris Mason sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); 1878af31f5e5SChris Mason } 1879af31f5e5SChris Mason 1880af31f5e5SChris Mason /* 1881af31f5e5SChris Mason * this copies info out of the root backup array and back into 1882af31f5e5SChris Mason * the in-memory super block. It is meant to help iterate through 1883af31f5e5SChris Mason * the array, so you send it the number of backups you've already 1884af31f5e5SChris Mason * tried and the last backup index you used. 1885af31f5e5SChris Mason * 1886af31f5e5SChris Mason * this returns -1 when it has tried all the backups 1887af31f5e5SChris Mason */ 1888af31f5e5SChris Mason static noinline int next_root_backup(struct btrfs_fs_info *info, 1889af31f5e5SChris Mason struct btrfs_super_block *super, 1890af31f5e5SChris Mason int *num_backups_tried, int *backup_index) 1891af31f5e5SChris Mason { 1892af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1893af31f5e5SChris Mason int newest = *backup_index; 1894af31f5e5SChris Mason 1895af31f5e5SChris Mason if (*num_backups_tried == 0) { 1896af31f5e5SChris Mason u64 gen = btrfs_super_generation(super); 1897af31f5e5SChris Mason 1898af31f5e5SChris Mason newest = find_newest_super_backup(info, gen); 1899af31f5e5SChris Mason if (newest == -1) 1900af31f5e5SChris Mason return -1; 1901af31f5e5SChris Mason 1902af31f5e5SChris Mason *backup_index = newest; 1903af31f5e5SChris Mason *num_backups_tried = 1; 1904af31f5e5SChris Mason } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { 1905af31f5e5SChris Mason /* we've tried all the backups, all done */ 1906af31f5e5SChris Mason return -1; 1907af31f5e5SChris Mason } else { 1908af31f5e5SChris Mason /* jump to the next oldest backup */ 1909af31f5e5SChris Mason newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % 1910af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1911af31f5e5SChris Mason *backup_index = newest; 1912af31f5e5SChris Mason *num_backups_tried += 1; 1913af31f5e5SChris Mason } 1914af31f5e5SChris Mason root_backup = super->super_roots + newest; 1915af31f5e5SChris Mason 1916af31f5e5SChris Mason btrfs_set_super_generation(super, 1917af31f5e5SChris Mason btrfs_backup_tree_root_gen(root_backup)); 1918af31f5e5SChris Mason btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); 1919af31f5e5SChris Mason btrfs_set_super_root_level(super, 1920af31f5e5SChris Mason btrfs_backup_tree_root_level(root_backup)); 1921af31f5e5SChris Mason btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); 1922af31f5e5SChris Mason 1923af31f5e5SChris Mason /* 1924af31f5e5SChris Mason * fixme: the total bytes and num_devices need to match or we should 1925af31f5e5SChris Mason * need a fsck 1926af31f5e5SChris Mason */ 1927af31f5e5SChris Mason btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); 1928af31f5e5SChris Mason btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); 1929af31f5e5SChris Mason return 0; 1930af31f5e5SChris Mason } 1931af31f5e5SChris Mason 1932af31f5e5SChris Mason /* helper to cleanup tree roots */ 1933af31f5e5SChris Mason static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) 1934af31f5e5SChris Mason { 1935af31f5e5SChris Mason free_extent_buffer(info->tree_root->node); 1936af31f5e5SChris Mason free_extent_buffer(info->tree_root->commit_root); 1937af31f5e5SChris Mason free_extent_buffer(info->dev_root->node); 1938af31f5e5SChris Mason free_extent_buffer(info->dev_root->commit_root); 1939af31f5e5SChris Mason free_extent_buffer(info->extent_root->node); 1940af31f5e5SChris Mason free_extent_buffer(info->extent_root->commit_root); 1941af31f5e5SChris Mason free_extent_buffer(info->csum_root->node); 1942af31f5e5SChris Mason free_extent_buffer(info->csum_root->commit_root); 1943bcef60f2SArne Jansen if (info->quota_root) { 1944bcef60f2SArne Jansen free_extent_buffer(info->quota_root->node); 1945bcef60f2SArne Jansen free_extent_buffer(info->quota_root->commit_root); 1946bcef60f2SArne Jansen } 1947af31f5e5SChris Mason 1948af31f5e5SChris Mason info->tree_root->node = NULL; 1949af31f5e5SChris Mason info->tree_root->commit_root = NULL; 1950af31f5e5SChris Mason info->dev_root->node = NULL; 1951af31f5e5SChris Mason info->dev_root->commit_root = NULL; 1952af31f5e5SChris Mason info->extent_root->node = NULL; 1953af31f5e5SChris Mason info->extent_root->commit_root = NULL; 1954af31f5e5SChris Mason info->csum_root->node = NULL; 1955af31f5e5SChris Mason info->csum_root->commit_root = NULL; 1956bcef60f2SArne Jansen if (info->quota_root) { 1957bcef60f2SArne Jansen info->quota_root->node = NULL; 1958bcef60f2SArne Jansen info->quota_root->commit_root = NULL; 1959bcef60f2SArne Jansen } 1960af31f5e5SChris Mason 1961af31f5e5SChris Mason if (chunk_root) { 1962af31f5e5SChris Mason free_extent_buffer(info->chunk_root->node); 1963af31f5e5SChris Mason free_extent_buffer(info->chunk_root->commit_root); 1964af31f5e5SChris Mason info->chunk_root->node = NULL; 1965af31f5e5SChris Mason info->chunk_root->commit_root = NULL; 1966af31f5e5SChris Mason } 1967af31f5e5SChris Mason } 1968af31f5e5SChris Mason 1969af31f5e5SChris Mason 1970ad2b2c80SAl Viro int open_ctree(struct super_block *sb, 1971dfe25020SChris Mason struct btrfs_fs_devices *fs_devices, 1972dfe25020SChris Mason char *options) 1973eb60ceacSChris Mason { 1974db94535dSChris Mason u32 sectorsize; 1975db94535dSChris Mason u32 nodesize; 1976db94535dSChris Mason u32 leafsize; 1977db94535dSChris Mason u32 blocksize; 197887ee04ebSChris Mason u32 stripesize; 197984234f3aSYan Zheng u64 generation; 1980f2b636e8SJosef Bacik u64 features; 19813de4586cSChris Mason struct btrfs_key location; 1982a061fc8dSChris Mason struct buffer_head *bh; 19834d34b278SIlya Dryomov struct btrfs_super_block *disk_super; 1984815745cfSAl Viro struct btrfs_fs_info *fs_info = btrfs_sb(sb); 1985f84a8bd6SAl Viro struct btrfs_root *tree_root; 19864d34b278SIlya Dryomov struct btrfs_root *extent_root; 19874d34b278SIlya Dryomov struct btrfs_root *csum_root; 19884d34b278SIlya Dryomov struct btrfs_root *chunk_root; 19894d34b278SIlya Dryomov struct btrfs_root *dev_root; 1990bcef60f2SArne Jansen struct btrfs_root *quota_root; 1991e02119d5SChris Mason struct btrfs_root *log_tree_root; 1992eb60ceacSChris Mason int ret; 1993e58ca020SYan int err = -EINVAL; 1994af31f5e5SChris Mason int num_backups_tried = 0; 1995af31f5e5SChris Mason int backup_index = 0; 19964543df7eSChris Mason 1997f84a8bd6SAl Viro tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info); 19986f07e42eSAl Viro extent_root = fs_info->extent_root = btrfs_alloc_root(fs_info); 19996f07e42eSAl Viro csum_root = fs_info->csum_root = btrfs_alloc_root(fs_info); 20006f07e42eSAl Viro chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info); 20016f07e42eSAl Viro dev_root = fs_info->dev_root = btrfs_alloc_root(fs_info); 2002bcef60f2SArne Jansen quota_root = fs_info->quota_root = btrfs_alloc_root(fs_info); 20038790d502SChris Mason 2004f84a8bd6SAl Viro if (!tree_root || !extent_root || !csum_root || 2005bcef60f2SArne Jansen !chunk_root || !dev_root || !quota_root) { 200639279cc3SChris Mason err = -ENOMEM; 200739279cc3SChris Mason goto fail; 200839279cc3SChris Mason } 200976dda93cSYan, Zheng 201076dda93cSYan, Zheng ret = init_srcu_struct(&fs_info->subvol_srcu); 201176dda93cSYan, Zheng if (ret) { 201276dda93cSYan, Zheng err = ret; 201376dda93cSYan, Zheng goto fail; 201476dda93cSYan, Zheng } 201576dda93cSYan, Zheng 201676dda93cSYan, Zheng ret = setup_bdi(fs_info, &fs_info->bdi); 201776dda93cSYan, Zheng if (ret) { 201876dda93cSYan, Zheng err = ret; 201976dda93cSYan, Zheng goto fail_srcu; 202076dda93cSYan, Zheng } 202176dda93cSYan, Zheng 2022e2d84521SMiao Xie ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0); 2023e2d84521SMiao Xie if (ret) { 2024e2d84521SMiao Xie err = ret; 2025e2d84521SMiao Xie goto fail_bdi; 2026e2d84521SMiao Xie } 2027e2d84521SMiao Xie fs_info->dirty_metadata_batch = PAGE_CACHE_SIZE * 2028e2d84521SMiao Xie (1 + ilog2(nr_cpu_ids)); 2029e2d84521SMiao Xie 2030963d678bSMiao Xie ret = percpu_counter_init(&fs_info->delalloc_bytes, 0); 2031963d678bSMiao Xie if (ret) { 2032963d678bSMiao Xie err = ret; 2033963d678bSMiao Xie goto fail_dirty_metadata_bytes; 2034963d678bSMiao Xie } 2035963d678bSMiao Xie 203676dda93cSYan, Zheng fs_info->btree_inode = new_inode(sb); 203776dda93cSYan, Zheng if (!fs_info->btree_inode) { 203876dda93cSYan, Zheng err = -ENOMEM; 2039963d678bSMiao Xie goto fail_delalloc_bytes; 204076dda93cSYan, Zheng } 204176dda93cSYan, Zheng 2042a6591715SChris Mason mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); 20431561dedaSMiao Xie 204476dda93cSYan, Zheng INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 20458fd17795SChris Mason INIT_LIST_HEAD(&fs_info->trans_list); 2046facda1e7SChris Mason INIT_LIST_HEAD(&fs_info->dead_roots); 204724bbcf04SYan, Zheng INIT_LIST_HEAD(&fs_info->delayed_iputs); 2048ea8c2819SChris Mason INIT_LIST_HEAD(&fs_info->delalloc_inodes); 204911833d66SYan Zheng INIT_LIST_HEAD(&fs_info->caching_block_groups); 20501832a6d5SChris Mason spin_lock_init(&fs_info->delalloc_lock); 2051a4abeea4SJosef Bacik spin_lock_init(&fs_info->trans_lock); 205276dda93cSYan, Zheng spin_lock_init(&fs_info->fs_roots_radix_lock); 205324bbcf04SYan, Zheng spin_lock_init(&fs_info->delayed_iput_lock); 20544cb5300bSChris Mason spin_lock_init(&fs_info->defrag_inodes_lock); 20552bf64758SJosef Bacik spin_lock_init(&fs_info->free_chunk_lock); 2056f29021b2SJan Schmidt spin_lock_init(&fs_info->tree_mod_seq_lock); 2057f29021b2SJan Schmidt rwlock_init(&fs_info->tree_mod_log_lock); 20587585717fSChris Mason mutex_init(&fs_info->reloc_mutex); 2059de98ced9SMiao Xie seqlock_init(&fs_info->profiles_lock); 206019c00ddcSChris Mason 206158176a96SJosef Bacik init_completion(&fs_info->kobj_unregister); 20620b86a832SChris Mason INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); 20636324fbf3SChris Mason INIT_LIST_HEAD(&fs_info->space_info); 2064f29021b2SJan Schmidt INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); 20650b86a832SChris Mason btrfs_mapping_init(&fs_info->mapping_tree); 206666d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->global_block_rsv, 206766d8f3ddSMiao Xie BTRFS_BLOCK_RSV_GLOBAL); 206866d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delalloc_block_rsv, 206966d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELALLOC); 207066d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); 207166d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); 207266d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); 207366d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delayed_block_rsv, 207466d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELOPS); 2075cb03c743SChris Mason atomic_set(&fs_info->nr_async_submits, 0); 2076771ed689SChris Mason atomic_set(&fs_info->async_delalloc_pages, 0); 20778c8bee1dSChris Mason atomic_set(&fs_info->async_submit_draining, 0); 20780986fe9eSChris Mason atomic_set(&fs_info->nr_async_bios, 0); 20794cb5300bSChris Mason atomic_set(&fs_info->defrag_running, 0); 2080f29021b2SJan Schmidt atomic_set(&fs_info->tree_mod_seq, 0); 2081e20d96d6SChris Mason fs_info->sb = sb; 20826f568d35SChris Mason fs_info->max_inline = 8192 * 1024; 20839ed74f2dSJosef Bacik fs_info->metadata_ratio = 0; 20844cb5300bSChris Mason fs_info->defrag_inodes = RB_ROOT; 2085a4abeea4SJosef Bacik fs_info->trans_no_join = 0; 20862bf64758SJosef Bacik fs_info->free_chunk_space = 0; 2087f29021b2SJan Schmidt fs_info->tree_mod_log = RB_ROOT; 2088c8b97818SChris Mason 208990519d66SArne Jansen /* readahead state */ 209090519d66SArne Jansen INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT); 209190519d66SArne Jansen spin_lock_init(&fs_info->reada_lock); 20922c90e5d6SChris Mason 2093b34b086cSChris Mason fs_info->thread_pool_size = min_t(unsigned long, 2094b34b086cSChris Mason num_online_cpus() + 2, 8); 20950afbaf8cSChris Mason 20963eaa2885SChris Mason INIT_LIST_HEAD(&fs_info->ordered_extents); 20973eaa2885SChris Mason spin_lock_init(&fs_info->ordered_extent_lock); 209816cdcec7SMiao Xie fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), 209916cdcec7SMiao Xie GFP_NOFS); 210016cdcec7SMiao Xie if (!fs_info->delayed_root) { 210116cdcec7SMiao Xie err = -ENOMEM; 210216cdcec7SMiao Xie goto fail_iput; 210316cdcec7SMiao Xie } 210416cdcec7SMiao Xie btrfs_init_delayed_root(fs_info->delayed_root); 21053eaa2885SChris Mason 2106a2de733cSArne Jansen mutex_init(&fs_info->scrub_lock); 2107a2de733cSArne Jansen atomic_set(&fs_info->scrubs_running, 0); 2108a2de733cSArne Jansen atomic_set(&fs_info->scrub_pause_req, 0); 2109a2de733cSArne Jansen atomic_set(&fs_info->scrubs_paused, 0); 2110a2de733cSArne Jansen atomic_set(&fs_info->scrub_cancel_req, 0); 2111a2de733cSArne Jansen init_waitqueue_head(&fs_info->scrub_pause_wait); 2112a2de733cSArne Jansen init_rwsem(&fs_info->scrub_super_lock); 2113a2de733cSArne Jansen fs_info->scrub_workers_refcnt = 0; 211421adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 211521adbd5cSStefan Behrens fs_info->check_integrity_print_mask = 0; 211621adbd5cSStefan Behrens #endif 2117a2de733cSArne Jansen 2118c9e9f97bSIlya Dryomov spin_lock_init(&fs_info->balance_lock); 2119c9e9f97bSIlya Dryomov mutex_init(&fs_info->balance_mutex); 2120837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_running, 0); 2121837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_pause_req, 0); 2122a7e99c69SIlya Dryomov atomic_set(&fs_info->balance_cancel_req, 0); 2123c9e9f97bSIlya Dryomov fs_info->balance_ctl = NULL; 2124837d5b6eSIlya Dryomov init_waitqueue_head(&fs_info->balance_wait_q); 2125a061fc8dSChris Mason 21260afbaf8cSChris Mason sb->s_blocksize = 4096; 21270afbaf8cSChris Mason sb->s_blocksize_bits = blksize_bits(4096); 212832a88aa1SJens Axboe sb->s_bdi = &fs_info->bdi; 21290afbaf8cSChris Mason 213076dda93cSYan, Zheng fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; 2131bfe86848SMiklos Szeredi set_nlink(fs_info->btree_inode, 1); 21320afbaf8cSChris Mason /* 21330afbaf8cSChris Mason * we set the i_size on the btree inode to the max possible int. 21340afbaf8cSChris Mason * the real end of the address space is determined by all of 21350afbaf8cSChris Mason * the devices in the system 21360afbaf8cSChris Mason */ 21370afbaf8cSChris Mason fs_info->btree_inode->i_size = OFFSET_MAX; 2138d98237b3SChris Mason fs_info->btree_inode->i_mapping->a_ops = &btree_aops; 213904160088SChris Mason fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; 214004160088SChris Mason 21415d4f98a2SYan Zheng RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); 2142d1310b2eSChris Mason extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, 2143f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 21440b32f4bbSJosef Bacik BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; 2145a8067e02SDavid Sterba extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); 21460da5468fSChris Mason 2147d1310b2eSChris Mason BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; 2148d1310b2eSChris Mason 21490f7d52f4SChris Mason BTRFS_I(fs_info->btree_inode)->root = tree_root; 21500f7d52f4SChris Mason memset(&BTRFS_I(fs_info->btree_inode)->location, 0, 21510f7d52f4SChris Mason sizeof(struct btrfs_key)); 215272ac3c0dSJosef Bacik set_bit(BTRFS_INODE_DUMMY, 215372ac3c0dSJosef Bacik &BTRFS_I(fs_info->btree_inode)->runtime_flags); 215422b0ebdaSChris Mason insert_inode_hash(fs_info->btree_inode); 215539279cc3SChris Mason 2156e02119d5SChris Mason spin_lock_init(&fs_info->block_group_cache_lock); 21576bef4d31SEric Paris fs_info->block_group_cache_tree = RB_ROOT; 2158a1897fddSLiu Bo fs_info->first_logical_byte = (u64)-1; 2159925baeddSChris Mason 216011833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[0], 2161f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 216211833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[1], 2163f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 216411833d66SYan Zheng fs_info->pinned_extents = &fs_info->freed_extents[0]; 2165e6dcd2dcSChris Mason fs_info->do_barriers = 1; 2166f9295749SChris Mason 2167d98237b3SChris Mason 21685a3f23d5SChris Mason mutex_init(&fs_info->ordered_operations_mutex); 216930ae8467SChris Mason mutex_init(&fs_info->tree_log_mutex); 2170925baeddSChris Mason mutex_init(&fs_info->chunk_mutex); 2171925baeddSChris Mason mutex_init(&fs_info->transaction_kthread_mutex); 2172a74a4b97SChris Mason mutex_init(&fs_info->cleaner_mutex); 2173a74a4b97SChris Mason mutex_init(&fs_info->volume_mutex); 2174276e680dSYan Zheng init_rwsem(&fs_info->extent_commit_sem); 2175c71bf099SYan, Zheng init_rwsem(&fs_info->cleanup_work_sem); 217676dda93cSYan, Zheng init_rwsem(&fs_info->subvol_sem); 2177e922e087SStefan Behrens fs_info->dev_replace.lock_owner = 0; 2178e922e087SStefan Behrens atomic_set(&fs_info->dev_replace.nesting_level, 0); 2179e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); 2180e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock_management_lock); 2181e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock); 2182fa9c0d79SChris Mason 2183416ac51dSArne Jansen spin_lock_init(&fs_info->qgroup_lock); 2184416ac51dSArne Jansen fs_info->qgroup_tree = RB_ROOT; 2185416ac51dSArne Jansen INIT_LIST_HEAD(&fs_info->dirty_qgroups); 2186416ac51dSArne Jansen fs_info->qgroup_seq = 1; 2187416ac51dSArne Jansen fs_info->quota_enabled = 0; 2188416ac51dSArne Jansen fs_info->pending_quota_state = 0; 2189416ac51dSArne Jansen 2190fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); 2191fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->data_alloc_cluster); 2192fa9c0d79SChris Mason 21937d9eb12cSChris Mason init_waitqueue_head(&fs_info->transaction_throttle); 21943768f368SChris Mason init_waitqueue_head(&fs_info->transaction_wait); 2195bb9c12c9SSage Weil init_waitqueue_head(&fs_info->transaction_blocked_wait); 21964854ddd0SChris Mason init_waitqueue_head(&fs_info->async_submit_wait); 21979a8dd150SChris Mason 219853b381b3SDavid Woodhouse ret = btrfs_alloc_stripe_hash_table(fs_info); 219953b381b3SDavid Woodhouse if (ret) { 220053b381b3SDavid Woodhouse err = -ENOMEM; 220153b381b3SDavid Woodhouse goto fail_alloc; 220253b381b3SDavid Woodhouse } 220353b381b3SDavid Woodhouse 22040b86a832SChris Mason __setup_root(4096, 4096, 4096, 4096, tree_root, 22052c90e5d6SChris Mason fs_info, BTRFS_ROOT_TREE_OBJECTID); 22067eccb903SChris Mason 22073c4bb26bSChris Mason invalidate_bdev(fs_devices->latest_bdev); 2208a512bbf8SYan Zheng bh = btrfs_read_dev_super(fs_devices->latest_bdev); 220920b45077SDave Young if (!bh) { 221020b45077SDave Young err = -EINVAL; 221116cdcec7SMiao Xie goto fail_alloc; 221220b45077SDave Young } 221339279cc3SChris Mason 22146c41761fSDavid Sterba memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); 22156c41761fSDavid Sterba memcpy(fs_info->super_for_commit, fs_info->super_copy, 22166c41761fSDavid Sterba sizeof(*fs_info->super_for_commit)); 2217a061fc8dSChris Mason brelse(bh); 22185f39d397SChris Mason 22196c41761fSDavid Sterba memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); 22200b86a832SChris Mason 22216c41761fSDavid Sterba disk_super = fs_info->super_copy; 22220f7d52f4SChris Mason if (!btrfs_super_root(disk_super)) 222316cdcec7SMiao Xie goto fail_alloc; 22240f7d52f4SChris Mason 2225acce952bSliubo /* check FS state, whether FS is broken. */ 222687533c47SMiao Xie if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) 222787533c47SMiao Xie set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); 2228acce952bSliubo 2229fcd1f065SDavid Sterba ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); 2230fcd1f065SDavid Sterba if (ret) { 2231fcd1f065SDavid Sterba printk(KERN_ERR "btrfs: superblock contains fatal errors\n"); 2232fcd1f065SDavid Sterba err = ret; 2233fcd1f065SDavid Sterba goto fail_alloc; 2234fcd1f065SDavid Sterba } 2235acce952bSliubo 223675e7cb7fSLiu Bo /* 2237af31f5e5SChris Mason * run through our array of backup supers and setup 2238af31f5e5SChris Mason * our ring pointer to the oldest one 2239af31f5e5SChris Mason */ 2240af31f5e5SChris Mason generation = btrfs_super_generation(disk_super); 2241af31f5e5SChris Mason find_oldest_super_backup(fs_info, generation); 2242af31f5e5SChris Mason 2243af31f5e5SChris Mason /* 224475e7cb7fSLiu Bo * In the long term, we'll store the compression type in the super 224575e7cb7fSLiu Bo * block, and it'll be used for per file compression control. 224675e7cb7fSLiu Bo */ 224775e7cb7fSLiu Bo fs_info->compress_type = BTRFS_COMPRESS_ZLIB; 224875e7cb7fSLiu Bo 22492b82032cSYan Zheng ret = btrfs_parse_options(tree_root, options); 22502b82032cSYan Zheng if (ret) { 22512b82032cSYan Zheng err = ret; 225216cdcec7SMiao Xie goto fail_alloc; 22532b82032cSYan Zheng } 2254dfe25020SChris Mason 2255f2b636e8SJosef Bacik features = btrfs_super_incompat_flags(disk_super) & 2256f2b636e8SJosef Bacik ~BTRFS_FEATURE_INCOMPAT_SUPP; 2257f2b636e8SJosef Bacik if (features) { 2258f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount because of " 2259f2b636e8SJosef Bacik "unsupported optional features (%Lx).\n", 226021380931SJoel Becker (unsigned long long)features); 2261f2b636e8SJosef Bacik err = -EINVAL; 226216cdcec7SMiao Xie goto fail_alloc; 2263f2b636e8SJosef Bacik } 2264f2b636e8SJosef Bacik 2265727011e0SChris Mason if (btrfs_super_leafsize(disk_super) != 2266727011e0SChris Mason btrfs_super_nodesize(disk_super)) { 2267727011e0SChris Mason printk(KERN_ERR "BTRFS: couldn't mount because metadata " 2268727011e0SChris Mason "blocksizes don't match. node %d leaf %d\n", 2269727011e0SChris Mason btrfs_super_nodesize(disk_super), 2270727011e0SChris Mason btrfs_super_leafsize(disk_super)); 2271727011e0SChris Mason err = -EINVAL; 2272727011e0SChris Mason goto fail_alloc; 2273727011e0SChris Mason } 2274727011e0SChris Mason if (btrfs_super_leafsize(disk_super) > BTRFS_MAX_METADATA_BLOCKSIZE) { 2275727011e0SChris Mason printk(KERN_ERR "BTRFS: couldn't mount because metadata " 2276727011e0SChris Mason "blocksize (%d) was too large\n", 2277727011e0SChris Mason btrfs_super_leafsize(disk_super)); 2278727011e0SChris Mason err = -EINVAL; 2279727011e0SChris Mason goto fail_alloc; 2280727011e0SChris Mason } 2281727011e0SChris Mason 22825d4f98a2SYan Zheng features = btrfs_super_incompat_flags(disk_super); 22835d4f98a2SYan Zheng features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; 228469e380d1SLi Zefan if (tree_root->fs_info->compress_type == BTRFS_COMPRESS_LZO) 2285a6fa6faeSLi Zefan features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; 2286727011e0SChris Mason 2287727011e0SChris Mason /* 2288727011e0SChris Mason * flag our filesystem as having big metadata blocks if 2289727011e0SChris Mason * they are bigger than the page size 2290727011e0SChris Mason */ 2291727011e0SChris Mason if (btrfs_super_leafsize(disk_super) > PAGE_CACHE_SIZE) { 2292727011e0SChris Mason if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) 2293727011e0SChris Mason printk(KERN_INFO "btrfs flagging fs with big metadata feature\n"); 2294727011e0SChris Mason features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; 2295727011e0SChris Mason } 2296727011e0SChris Mason 2297bc3f116fSChris Mason nodesize = btrfs_super_nodesize(disk_super); 2298bc3f116fSChris Mason leafsize = btrfs_super_leafsize(disk_super); 2299bc3f116fSChris Mason sectorsize = btrfs_super_sectorsize(disk_super); 2300bc3f116fSChris Mason stripesize = btrfs_super_stripesize(disk_super); 2301e2d84521SMiao Xie fs_info->dirty_metadata_batch = leafsize * (1 + ilog2(nr_cpu_ids)); 2302963d678bSMiao Xie fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); 2303bc3f116fSChris Mason 2304bc3f116fSChris Mason /* 2305bc3f116fSChris Mason * mixed block groups end up with duplicate but slightly offset 2306bc3f116fSChris Mason * extent buffers for the same range. It leads to corruptions 2307bc3f116fSChris Mason */ 2308bc3f116fSChris Mason if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && 2309bc3f116fSChris Mason (sectorsize != leafsize)) { 2310bc3f116fSChris Mason printk(KERN_WARNING "btrfs: unequal leaf/node/sector sizes " 2311bc3f116fSChris Mason "are not allowed for mixed block groups on %s\n", 2312bc3f116fSChris Mason sb->s_id); 2313bc3f116fSChris Mason goto fail_alloc; 2314bc3f116fSChris Mason } 2315bc3f116fSChris Mason 23165d4f98a2SYan Zheng btrfs_set_super_incompat_flags(disk_super, features); 23175d4f98a2SYan Zheng 2318f2b636e8SJosef Bacik features = btrfs_super_compat_ro_flags(disk_super) & 2319f2b636e8SJosef Bacik ~BTRFS_FEATURE_COMPAT_RO_SUPP; 2320f2b636e8SJosef Bacik if (!(sb->s_flags & MS_RDONLY) && features) { 2321f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount RDWR because of " 2322f2b636e8SJosef Bacik "unsupported option features (%Lx).\n", 232321380931SJoel Becker (unsigned long long)features); 2324f2b636e8SJosef Bacik err = -EINVAL; 232516cdcec7SMiao Xie goto fail_alloc; 2326f2b636e8SJosef Bacik } 232761d92c32SChris Mason 232861d92c32SChris Mason btrfs_init_workers(&fs_info->generic_worker, 232961d92c32SChris Mason "genwork", 1, NULL); 233061d92c32SChris Mason 23315443be45SChris Mason btrfs_init_workers(&fs_info->workers, "worker", 233261d92c32SChris Mason fs_info->thread_pool_size, 233361d92c32SChris Mason &fs_info->generic_worker); 2334c8b97818SChris Mason 2335771ed689SChris Mason btrfs_init_workers(&fs_info->delalloc_workers, "delalloc", 233661d92c32SChris Mason fs_info->thread_pool_size, 233761d92c32SChris Mason &fs_info->generic_worker); 2338771ed689SChris Mason 23398ccf6f19SMiao Xie btrfs_init_workers(&fs_info->flush_workers, "flush_delalloc", 23408ccf6f19SMiao Xie fs_info->thread_pool_size, 23418ccf6f19SMiao Xie &fs_info->generic_worker); 23428ccf6f19SMiao Xie 23435443be45SChris Mason btrfs_init_workers(&fs_info->submit_workers, "submit", 2344b720d209SChris Mason min_t(u64, fs_devices->num_devices, 234561d92c32SChris Mason fs_info->thread_pool_size), 234661d92c32SChris Mason &fs_info->generic_worker); 234761b49440SChris Mason 2348bab39bf9SJosef Bacik btrfs_init_workers(&fs_info->caching_workers, "cache", 2349bab39bf9SJosef Bacik 2, &fs_info->generic_worker); 2350bab39bf9SJosef Bacik 235161b49440SChris Mason /* a higher idle thresh on the submit workers makes it much more 235261b49440SChris Mason * likely that bios will be send down in a sane order to the 235361b49440SChris Mason * devices 235461b49440SChris Mason */ 235561b49440SChris Mason fs_info->submit_workers.idle_thresh = 64; 235653863232SChris Mason 2357771ed689SChris Mason fs_info->workers.idle_thresh = 16; 23584a69a410SChris Mason fs_info->workers.ordered = 1; 235961b49440SChris Mason 2360771ed689SChris Mason fs_info->delalloc_workers.idle_thresh = 2; 2361771ed689SChris Mason fs_info->delalloc_workers.ordered = 1; 2362771ed689SChris Mason 236361d92c32SChris Mason btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1, 236461d92c32SChris Mason &fs_info->generic_worker); 23655443be45SChris Mason btrfs_init_workers(&fs_info->endio_workers, "endio", 236661d92c32SChris Mason fs_info->thread_pool_size, 236761d92c32SChris Mason &fs_info->generic_worker); 2368d20f7043SChris Mason btrfs_init_workers(&fs_info->endio_meta_workers, "endio-meta", 236961d92c32SChris Mason fs_info->thread_pool_size, 237061d92c32SChris Mason &fs_info->generic_worker); 2371cad321adSChris Mason btrfs_init_workers(&fs_info->endio_meta_write_workers, 237261d92c32SChris Mason "endio-meta-write", fs_info->thread_pool_size, 237361d92c32SChris Mason &fs_info->generic_worker); 237453b381b3SDavid Woodhouse btrfs_init_workers(&fs_info->endio_raid56_workers, 237553b381b3SDavid Woodhouse "endio-raid56", fs_info->thread_pool_size, 237653b381b3SDavid Woodhouse &fs_info->generic_worker); 237753b381b3SDavid Woodhouse btrfs_init_workers(&fs_info->rmw_workers, 237853b381b3SDavid Woodhouse "rmw", fs_info->thread_pool_size, 237953b381b3SDavid Woodhouse &fs_info->generic_worker); 23805443be45SChris Mason btrfs_init_workers(&fs_info->endio_write_workers, "endio-write", 238161d92c32SChris Mason fs_info->thread_pool_size, 238261d92c32SChris Mason &fs_info->generic_worker); 23830cb59c99SJosef Bacik btrfs_init_workers(&fs_info->endio_freespace_worker, "freespace-write", 23840cb59c99SJosef Bacik 1, &fs_info->generic_worker); 238516cdcec7SMiao Xie btrfs_init_workers(&fs_info->delayed_workers, "delayed-meta", 238616cdcec7SMiao Xie fs_info->thread_pool_size, 238716cdcec7SMiao Xie &fs_info->generic_worker); 238890519d66SArne Jansen btrfs_init_workers(&fs_info->readahead_workers, "readahead", 238990519d66SArne Jansen fs_info->thread_pool_size, 239090519d66SArne Jansen &fs_info->generic_worker); 239161b49440SChris Mason 239261b49440SChris Mason /* 239361b49440SChris Mason * endios are largely parallel and should have a very 239461b49440SChris Mason * low idle thresh 239561b49440SChris Mason */ 239661b49440SChris Mason fs_info->endio_workers.idle_thresh = 4; 2397b51912c9SChris Mason fs_info->endio_meta_workers.idle_thresh = 4; 239853b381b3SDavid Woodhouse fs_info->endio_raid56_workers.idle_thresh = 4; 239953b381b3SDavid Woodhouse fs_info->rmw_workers.idle_thresh = 2; 2400b51912c9SChris Mason 24019042846bSChris Mason fs_info->endio_write_workers.idle_thresh = 2; 24029042846bSChris Mason fs_info->endio_meta_write_workers.idle_thresh = 2; 240390519d66SArne Jansen fs_info->readahead_workers.idle_thresh = 2; 24049042846bSChris Mason 24050dc3b84aSJosef Bacik /* 24060dc3b84aSJosef Bacik * btrfs_start_workers can really only fail because of ENOMEM so just 24070dc3b84aSJosef Bacik * return -ENOMEM if any of these fail. 24080dc3b84aSJosef Bacik */ 24090dc3b84aSJosef Bacik ret = btrfs_start_workers(&fs_info->workers); 24100dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->generic_worker); 24110dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->submit_workers); 24120dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delalloc_workers); 24130dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->fixup_workers); 24140dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_workers); 24150dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_workers); 241653b381b3SDavid Woodhouse ret |= btrfs_start_workers(&fs_info->rmw_workers); 241753b381b3SDavid Woodhouse ret |= btrfs_start_workers(&fs_info->endio_raid56_workers); 24180dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_write_workers); 24190dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_write_workers); 24200dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_freespace_worker); 24210dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delayed_workers); 24220dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->caching_workers); 24230dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->readahead_workers); 24248ccf6f19SMiao Xie ret |= btrfs_start_workers(&fs_info->flush_workers); 24250dc3b84aSJosef Bacik if (ret) { 2426fed425c7SIlya Dryomov err = -ENOMEM; 24270dc3b84aSJosef Bacik goto fail_sb_buffer; 24280dc3b84aSJosef Bacik } 24294543df7eSChris Mason 24304575c9ccSChris Mason fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); 2431c8b97818SChris Mason fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, 2432c8b97818SChris Mason 4 * 1024 * 1024 / PAGE_CACHE_SIZE); 24334575c9ccSChris Mason 2434db94535dSChris Mason tree_root->nodesize = nodesize; 2435db94535dSChris Mason tree_root->leafsize = leafsize; 2436db94535dSChris Mason tree_root->sectorsize = sectorsize; 243787ee04ebSChris Mason tree_root->stripesize = stripesize; 2438a061fc8dSChris Mason 2439a061fc8dSChris Mason sb->s_blocksize = sectorsize; 2440a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(sectorsize); 2441db94535dSChris Mason 2442cdb4c574SZach Brown if (disk_super->magic != cpu_to_le64(BTRFS_MAGIC)) { 2443d397712bSChris Mason printk(KERN_INFO "btrfs: valid FS not found on %s\n", sb->s_id); 244439279cc3SChris Mason goto fail_sb_buffer; 244539279cc3SChris Mason } 244619c00ddcSChris Mason 24478d082fb7SLiu Bo if (sectorsize != PAGE_SIZE) { 24488d082fb7SLiu Bo printk(KERN_WARNING "btrfs: Incompatible sector size(%lu) " 24498d082fb7SLiu Bo "found on %s\n", (unsigned long)sectorsize, sb->s_id); 2450941b2ddfSKeith Mannthey goto fail_sb_buffer; 2451941b2ddfSKeith Mannthey } 2452941b2ddfSKeith Mannthey 2453925baeddSChris Mason mutex_lock(&fs_info->chunk_mutex); 2454e4404d6eSYan Zheng ret = btrfs_read_sys_array(tree_root); 2455925baeddSChris Mason mutex_unlock(&fs_info->chunk_mutex); 245684eed90fSChris Mason if (ret) { 2457d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read the system " 2458d397712bSChris Mason "array on %s\n", sb->s_id); 24595d4f98a2SYan Zheng goto fail_sb_buffer; 246084eed90fSChris Mason } 24610b86a832SChris Mason 24620b86a832SChris Mason blocksize = btrfs_level_size(tree_root, 24630b86a832SChris Mason btrfs_super_chunk_root_level(disk_super)); 246484234f3aSYan Zheng generation = btrfs_super_chunk_root_generation(disk_super); 24650b86a832SChris Mason 24660b86a832SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 24670b86a832SChris Mason chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); 24680b86a832SChris Mason 24690b86a832SChris Mason chunk_root->node = read_tree_block(chunk_root, 24700b86a832SChris Mason btrfs_super_chunk_root(disk_super), 247184234f3aSYan Zheng blocksize, generation); 247279787eaaSJeff Mahoney BUG_ON(!chunk_root->node); /* -ENOMEM */ 247383121942SDavid Woodhouse if (!test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { 247483121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n", 247583121942SDavid Woodhouse sb->s_id); 2476af31f5e5SChris Mason goto fail_tree_roots; 247783121942SDavid Woodhouse } 24785d4f98a2SYan Zheng btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); 24795d4f98a2SYan Zheng chunk_root->commit_root = btrfs_root_node(chunk_root); 24800b86a832SChris Mason 2481e17cade2SChris Mason read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, 2482e17cade2SChris Mason (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node), 2483e17cade2SChris Mason BTRFS_UUID_SIZE); 2484e17cade2SChris Mason 24850b86a832SChris Mason ret = btrfs_read_chunk_tree(chunk_root); 24862b82032cSYan Zheng if (ret) { 2487d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read chunk tree on %s\n", 2488d397712bSChris Mason sb->s_id); 2489af31f5e5SChris Mason goto fail_tree_roots; 24902b82032cSYan Zheng } 24910b86a832SChris Mason 24928dabb742SStefan Behrens /* 24938dabb742SStefan Behrens * keep the device that is marked to be the target device for the 24948dabb742SStefan Behrens * dev_replace procedure 24958dabb742SStefan Behrens */ 24968dabb742SStefan Behrens btrfs_close_extra_devices(fs_info, fs_devices, 0); 2497dfe25020SChris Mason 2498a6b0d5c8SChris Mason if (!fs_devices->latest_bdev) { 2499a6b0d5c8SChris Mason printk(KERN_CRIT "btrfs: failed to read devices on %s\n", 2500a6b0d5c8SChris Mason sb->s_id); 2501a6b0d5c8SChris Mason goto fail_tree_roots; 2502a6b0d5c8SChris Mason } 2503a6b0d5c8SChris Mason 2504af31f5e5SChris Mason retry_root_backup: 2505db94535dSChris Mason blocksize = btrfs_level_size(tree_root, 2506db94535dSChris Mason btrfs_super_root_level(disk_super)); 250784234f3aSYan Zheng generation = btrfs_super_generation(disk_super); 25080b86a832SChris Mason 2509e20d96d6SChris Mason tree_root->node = read_tree_block(tree_root, 2510db94535dSChris Mason btrfs_super_root(disk_super), 251184234f3aSYan Zheng blocksize, generation); 2512af31f5e5SChris Mason if (!tree_root->node || 2513af31f5e5SChris Mason !test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) { 251483121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read tree root on %s\n", 251583121942SDavid Woodhouse sb->s_id); 2516af31f5e5SChris Mason 2517af31f5e5SChris Mason goto recovery_tree_root; 251883121942SDavid Woodhouse } 2519af31f5e5SChris Mason 25205d4f98a2SYan Zheng btrfs_set_root_node(&tree_root->root_item, tree_root->node); 25215d4f98a2SYan Zheng tree_root->commit_root = btrfs_root_node(tree_root); 2522db94535dSChris Mason 2523db94535dSChris Mason ret = find_and_setup_root(tree_root, fs_info, 2524e20d96d6SChris Mason BTRFS_EXTENT_TREE_OBJECTID, extent_root); 25250b86a832SChris Mason if (ret) 2526af31f5e5SChris Mason goto recovery_tree_root; 25270b86a832SChris Mason extent_root->track_dirty = 1; 25280b86a832SChris Mason 25290b86a832SChris Mason ret = find_and_setup_root(tree_root, fs_info, 25300b86a832SChris Mason BTRFS_DEV_TREE_OBJECTID, dev_root); 25310b86a832SChris Mason if (ret) 2532af31f5e5SChris Mason goto recovery_tree_root; 25335d4f98a2SYan Zheng dev_root->track_dirty = 1; 25343768f368SChris Mason 2535d20f7043SChris Mason ret = find_and_setup_root(tree_root, fs_info, 2536d20f7043SChris Mason BTRFS_CSUM_TREE_OBJECTID, csum_root); 2537d20f7043SChris Mason if (ret) 2538af31f5e5SChris Mason goto recovery_tree_root; 2539d20f7043SChris Mason csum_root->track_dirty = 1; 2540d20f7043SChris Mason 2541bcef60f2SArne Jansen ret = find_and_setup_root(tree_root, fs_info, 2542bcef60f2SArne Jansen BTRFS_QUOTA_TREE_OBJECTID, quota_root); 2543bcef60f2SArne Jansen if (ret) { 2544bcef60f2SArne Jansen kfree(quota_root); 2545bcef60f2SArne Jansen quota_root = fs_info->quota_root = NULL; 2546bcef60f2SArne Jansen } else { 2547bcef60f2SArne Jansen quota_root->track_dirty = 1; 2548bcef60f2SArne Jansen fs_info->quota_enabled = 1; 2549bcef60f2SArne Jansen fs_info->pending_quota_state = 1; 2550bcef60f2SArne Jansen } 2551bcef60f2SArne Jansen 25528929ecfaSYan, Zheng fs_info->generation = generation; 25538929ecfaSYan, Zheng fs_info->last_trans_committed = generation; 25548929ecfaSYan, Zheng 255568310a5eSIlya Dryomov ret = btrfs_recover_balance(fs_info); 255668310a5eSIlya Dryomov if (ret) { 255768310a5eSIlya Dryomov printk(KERN_WARNING "btrfs: failed to recover balance\n"); 255868310a5eSIlya Dryomov goto fail_block_groups; 255968310a5eSIlya Dryomov } 256068310a5eSIlya Dryomov 2561733f4fbbSStefan Behrens ret = btrfs_init_dev_stats(fs_info); 2562733f4fbbSStefan Behrens if (ret) { 2563733f4fbbSStefan Behrens printk(KERN_ERR "btrfs: failed to init dev_stats: %d\n", 2564733f4fbbSStefan Behrens ret); 2565733f4fbbSStefan Behrens goto fail_block_groups; 2566733f4fbbSStefan Behrens } 2567733f4fbbSStefan Behrens 25688dabb742SStefan Behrens ret = btrfs_init_dev_replace(fs_info); 25698dabb742SStefan Behrens if (ret) { 25708dabb742SStefan Behrens pr_err("btrfs: failed to init dev_replace: %d\n", ret); 25718dabb742SStefan Behrens goto fail_block_groups; 25728dabb742SStefan Behrens } 25738dabb742SStefan Behrens 25748dabb742SStefan Behrens btrfs_close_extra_devices(fs_info, fs_devices, 1); 25758dabb742SStefan Behrens 2576c59021f8Sliubo ret = btrfs_init_space_info(fs_info); 2577c59021f8Sliubo if (ret) { 2578c59021f8Sliubo printk(KERN_ERR "Failed to initial space info: %d\n", ret); 2579c59021f8Sliubo goto fail_block_groups; 2580c59021f8Sliubo } 2581c59021f8Sliubo 25821b1d1f66SJosef Bacik ret = btrfs_read_block_groups(extent_root); 25831b1d1f66SJosef Bacik if (ret) { 25841b1d1f66SJosef Bacik printk(KERN_ERR "Failed to read block groups: %d\n", ret); 25851b1d1f66SJosef Bacik goto fail_block_groups; 25861b1d1f66SJosef Bacik } 25875af3e8ccSStefan Behrens fs_info->num_tolerated_disk_barrier_failures = 25885af3e8ccSStefan Behrens btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); 2589292fd7fcSStefan Behrens if (fs_info->fs_devices->missing_devices > 2590292fd7fcSStefan Behrens fs_info->num_tolerated_disk_barrier_failures && 2591292fd7fcSStefan Behrens !(sb->s_flags & MS_RDONLY)) { 2592292fd7fcSStefan Behrens printk(KERN_WARNING 2593292fd7fcSStefan Behrens "Btrfs: too many missing devices, writeable mount is not allowed\n"); 2594292fd7fcSStefan Behrens goto fail_block_groups; 2595292fd7fcSStefan Behrens } 25969078a3e1SChris Mason 2597a74a4b97SChris Mason fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 2598a74a4b97SChris Mason "btrfs-cleaner"); 259957506d50SQinghuang Feng if (IS_ERR(fs_info->cleaner_kthread)) 26001b1d1f66SJosef Bacik goto fail_block_groups; 2601a74a4b97SChris Mason 2602a74a4b97SChris Mason fs_info->transaction_kthread = kthread_run(transaction_kthread, 2603a74a4b97SChris Mason tree_root, 2604a74a4b97SChris Mason "btrfs-transaction"); 260557506d50SQinghuang Feng if (IS_ERR(fs_info->transaction_kthread)) 26063f157a2fSChris Mason goto fail_cleaner; 2607a74a4b97SChris Mason 2608c289811cSChris Mason if (!btrfs_test_opt(tree_root, SSD) && 2609c289811cSChris Mason !btrfs_test_opt(tree_root, NOSSD) && 2610c289811cSChris Mason !fs_info->fs_devices->rotating) { 2611c289811cSChris Mason printk(KERN_INFO "Btrfs detected SSD devices, enabling SSD " 2612c289811cSChris Mason "mode\n"); 2613c289811cSChris Mason btrfs_set_opt(fs_info->mount_opt, SSD); 2614c289811cSChris Mason } 2615c289811cSChris Mason 261621adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 261721adbd5cSStefan Behrens if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { 261821adbd5cSStefan Behrens ret = btrfsic_mount(tree_root, fs_devices, 261921adbd5cSStefan Behrens btrfs_test_opt(tree_root, 262021adbd5cSStefan Behrens CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? 262121adbd5cSStefan Behrens 1 : 0, 262221adbd5cSStefan Behrens fs_info->check_integrity_print_mask); 262321adbd5cSStefan Behrens if (ret) 262421adbd5cSStefan Behrens printk(KERN_WARNING "btrfs: failed to initialize" 262521adbd5cSStefan Behrens " integrity check module %s\n", sb->s_id); 262621adbd5cSStefan Behrens } 262721adbd5cSStefan Behrens #endif 2628bcef60f2SArne Jansen ret = btrfs_read_qgroup_config(fs_info); 2629bcef60f2SArne Jansen if (ret) 2630bcef60f2SArne Jansen goto fail_trans_kthread; 263121adbd5cSStefan Behrens 2632acce952bSliubo /* do not make disk changes in broken FS */ 263368ce9682SStefan Behrens if (btrfs_super_log_root(disk_super) != 0) { 2634e02119d5SChris Mason u64 bytenr = btrfs_super_log_root(disk_super); 2635d18a2c44SChris Mason 26367c2ca468SChris Mason if (fs_devices->rw_devices == 0) { 2637d397712bSChris Mason printk(KERN_WARNING "Btrfs log replay required " 2638d397712bSChris Mason "on RO media\n"); 26397c2ca468SChris Mason err = -EIO; 2640bcef60f2SArne Jansen goto fail_qgroup; 26417c2ca468SChris Mason } 2642e02119d5SChris Mason blocksize = 2643e02119d5SChris Mason btrfs_level_size(tree_root, 2644e02119d5SChris Mason btrfs_super_log_root_level(disk_super)); 2645e02119d5SChris Mason 26466f07e42eSAl Viro log_tree_root = btrfs_alloc_root(fs_info); 2647676e4c86SDan Carpenter if (!log_tree_root) { 2648676e4c86SDan Carpenter err = -ENOMEM; 2649bcef60f2SArne Jansen goto fail_qgroup; 2650676e4c86SDan Carpenter } 2651e02119d5SChris Mason 2652e02119d5SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 2653e02119d5SChris Mason log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); 2654e02119d5SChris Mason 2655e02119d5SChris Mason log_tree_root->node = read_tree_block(tree_root, bytenr, 265684234f3aSYan Zheng blocksize, 265784234f3aSYan Zheng generation + 1); 265879787eaaSJeff Mahoney /* returns with log_tree_root freed on success */ 2659e02119d5SChris Mason ret = btrfs_recover_log_trees(log_tree_root); 266079787eaaSJeff Mahoney if (ret) { 266179787eaaSJeff Mahoney btrfs_error(tree_root->fs_info, ret, 266279787eaaSJeff Mahoney "Failed to recover log tree"); 266379787eaaSJeff Mahoney free_extent_buffer(log_tree_root->node); 266479787eaaSJeff Mahoney kfree(log_tree_root); 266579787eaaSJeff Mahoney goto fail_trans_kthread; 266679787eaaSJeff Mahoney } 2667e556ce2cSYan Zheng 2668e556ce2cSYan Zheng if (sb->s_flags & MS_RDONLY) { 2669e556ce2cSYan Zheng ret = btrfs_commit_super(tree_root); 267079787eaaSJeff Mahoney if (ret) 267179787eaaSJeff Mahoney goto fail_trans_kthread; 2672e556ce2cSYan Zheng } 2673e02119d5SChris Mason } 26741a40e23bSZheng Yan 267576dda93cSYan, Zheng ret = btrfs_find_orphan_roots(tree_root); 267679787eaaSJeff Mahoney if (ret) 267779787eaaSJeff Mahoney goto fail_trans_kthread; 267876dda93cSYan, Zheng 26797c2ca468SChris Mason if (!(sb->s_flags & MS_RDONLY)) { 2680d68fc57bSYan, Zheng ret = btrfs_cleanup_fs_roots(fs_info); 268144c44af2SIlya Dryomov if (ret) 268244c44af2SIlya Dryomov goto fail_trans_kthread; 2683d68fc57bSYan, Zheng 26845d4f98a2SYan Zheng ret = btrfs_recover_relocation(tree_root); 2685d7ce5843SMiao Xie if (ret < 0) { 2686d7ce5843SMiao Xie printk(KERN_WARNING 2687d7ce5843SMiao Xie "btrfs: failed to recover relocation\n"); 2688d7ce5843SMiao Xie err = -EINVAL; 2689bcef60f2SArne Jansen goto fail_qgroup; 2690d7ce5843SMiao Xie } 26917c2ca468SChris Mason } 26921a40e23bSZheng Yan 26933de4586cSChris Mason location.objectid = BTRFS_FS_TREE_OBJECTID; 26943de4586cSChris Mason location.type = BTRFS_ROOT_ITEM_KEY; 26953de4586cSChris Mason location.offset = (u64)-1; 26963de4586cSChris Mason 26973de4586cSChris Mason fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); 26983de4586cSChris Mason if (!fs_info->fs_root) 2699bcef60f2SArne Jansen goto fail_qgroup; 27003140c9a3SDan Carpenter if (IS_ERR(fs_info->fs_root)) { 27013140c9a3SDan Carpenter err = PTR_ERR(fs_info->fs_root); 2702bcef60f2SArne Jansen goto fail_qgroup; 27033140c9a3SDan Carpenter } 2704c289811cSChris Mason 27052b6ba629SIlya Dryomov if (sb->s_flags & MS_RDONLY) 27062b6ba629SIlya Dryomov return 0; 27072b6ba629SIlya Dryomov 2708e3acc2a6SJosef Bacik down_read(&fs_info->cleanup_work_sem); 27092b6ba629SIlya Dryomov if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || 27102b6ba629SIlya Dryomov (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { 27112b6ba629SIlya Dryomov up_read(&fs_info->cleanup_work_sem); 27122b6ba629SIlya Dryomov close_ctree(tree_root); 27132b6ba629SIlya Dryomov return ret; 27142b6ba629SIlya Dryomov } 2715e3acc2a6SJosef Bacik up_read(&fs_info->cleanup_work_sem); 271659641015SIlya Dryomov 27172b6ba629SIlya Dryomov ret = btrfs_resume_balance_async(fs_info); 27182b6ba629SIlya Dryomov if (ret) { 27192b6ba629SIlya Dryomov printk(KERN_WARNING "btrfs: failed to resume balance\n"); 272066b4ffd1SJosef Bacik close_ctree(tree_root); 27212b6ba629SIlya Dryomov return ret; 2722e3acc2a6SJosef Bacik } 2723e3acc2a6SJosef Bacik 27248dabb742SStefan Behrens ret = btrfs_resume_dev_replace_async(fs_info); 27258dabb742SStefan Behrens if (ret) { 27268dabb742SStefan Behrens pr_warn("btrfs: failed to resume dev_replace\n"); 27278dabb742SStefan Behrens close_ctree(tree_root); 27288dabb742SStefan Behrens return ret; 27298dabb742SStefan Behrens } 27308dabb742SStefan Behrens 2731ad2b2c80SAl Viro return 0; 273239279cc3SChris Mason 2733bcef60f2SArne Jansen fail_qgroup: 2734bcef60f2SArne Jansen btrfs_free_qgroup_config(fs_info); 27357c2ca468SChris Mason fail_trans_kthread: 27367c2ca468SChris Mason kthread_stop(fs_info->transaction_kthread); 27373f157a2fSChris Mason fail_cleaner: 2738a74a4b97SChris Mason kthread_stop(fs_info->cleaner_kthread); 27397c2ca468SChris Mason 27407c2ca468SChris Mason /* 27417c2ca468SChris Mason * make sure we're done with the btree inode before we stop our 27427c2ca468SChris Mason * kthreads 27437c2ca468SChris Mason */ 27447c2ca468SChris Mason filemap_write_and_wait(fs_info->btree_inode->i_mapping); 27457c2ca468SChris Mason 27461b1d1f66SJosef Bacik fail_block_groups: 27471b1d1f66SJosef Bacik btrfs_free_block_groups(fs_info); 2748af31f5e5SChris Mason 2749af31f5e5SChris Mason fail_tree_roots: 2750af31f5e5SChris Mason free_root_pointers(fs_info, 1); 27512b8195bbSMiao Xie invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 2752af31f5e5SChris Mason 275339279cc3SChris Mason fail_sb_buffer: 275461d92c32SChris Mason btrfs_stop_workers(&fs_info->generic_worker); 2755306c8b68SChris Mason btrfs_stop_workers(&fs_info->readahead_workers); 2756247e743cSChris Mason btrfs_stop_workers(&fs_info->fixup_workers); 2757771ed689SChris Mason btrfs_stop_workers(&fs_info->delalloc_workers); 27588b712842SChris Mason btrfs_stop_workers(&fs_info->workers); 27598b712842SChris Mason btrfs_stop_workers(&fs_info->endio_workers); 2760d20f7043SChris Mason btrfs_stop_workers(&fs_info->endio_meta_workers); 276153b381b3SDavid Woodhouse btrfs_stop_workers(&fs_info->endio_raid56_workers); 276253b381b3SDavid Woodhouse btrfs_stop_workers(&fs_info->rmw_workers); 2763cad321adSChris Mason btrfs_stop_workers(&fs_info->endio_meta_write_workers); 2764e6dcd2dcSChris Mason btrfs_stop_workers(&fs_info->endio_write_workers); 27650cb59c99SJosef Bacik btrfs_stop_workers(&fs_info->endio_freespace_worker); 27661cc127b5SChris Mason btrfs_stop_workers(&fs_info->submit_workers); 276716cdcec7SMiao Xie btrfs_stop_workers(&fs_info->delayed_workers); 2768bab39bf9SJosef Bacik btrfs_stop_workers(&fs_info->caching_workers); 27698ccf6f19SMiao Xie btrfs_stop_workers(&fs_info->flush_workers); 277016cdcec7SMiao Xie fail_alloc: 27714543df7eSChris Mason fail_iput: 2772586e46e2SIlya Dryomov btrfs_mapping_tree_free(&fs_info->mapping_tree); 2773586e46e2SIlya Dryomov 27744543df7eSChris Mason iput(fs_info->btree_inode); 2775963d678bSMiao Xie fail_delalloc_bytes: 2776963d678bSMiao Xie percpu_counter_destroy(&fs_info->delalloc_bytes); 2777e2d84521SMiao Xie fail_dirty_metadata_bytes: 2778e2d84521SMiao Xie percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 2779ad081f14SJens Axboe fail_bdi: 27807e662854SQinghuang Feng bdi_destroy(&fs_info->bdi); 278176dda93cSYan, Zheng fail_srcu: 278276dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 27837e662854SQinghuang Feng fail: 278453b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 2785586e46e2SIlya Dryomov btrfs_close_devices(fs_info->fs_devices); 2786ad2b2c80SAl Viro return err; 2787af31f5e5SChris Mason 2788af31f5e5SChris Mason recovery_tree_root: 2789af31f5e5SChris Mason if (!btrfs_test_opt(tree_root, RECOVERY)) 2790af31f5e5SChris Mason goto fail_tree_roots; 2791af31f5e5SChris Mason 2792af31f5e5SChris Mason free_root_pointers(fs_info, 0); 2793af31f5e5SChris Mason 2794af31f5e5SChris Mason /* don't use the log in recovery mode, it won't be valid */ 2795af31f5e5SChris Mason btrfs_set_super_log_root(disk_super, 0); 2796af31f5e5SChris Mason 2797af31f5e5SChris Mason /* we can't trust the free space cache either */ 2798af31f5e5SChris Mason btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); 2799af31f5e5SChris Mason 2800af31f5e5SChris Mason ret = next_root_backup(fs_info, fs_info->super_copy, 2801af31f5e5SChris Mason &num_backups_tried, &backup_index); 2802af31f5e5SChris Mason if (ret == -1) 2803af31f5e5SChris Mason goto fail_block_groups; 2804af31f5e5SChris Mason goto retry_root_backup; 2805eb60ceacSChris Mason } 2806eb60ceacSChris Mason 2807f2984462SChris Mason static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) 2808f2984462SChris Mason { 2809f2984462SChris Mason if (uptodate) { 2810f2984462SChris Mason set_buffer_uptodate(bh); 2811f2984462SChris Mason } else { 2812442a4f63SStefan Behrens struct btrfs_device *device = (struct btrfs_device *) 2813442a4f63SStefan Behrens bh->b_private; 2814442a4f63SStefan Behrens 2815606686eeSJosef Bacik printk_ratelimited_in_rcu(KERN_WARNING "lost page write due to " 2816606686eeSJosef Bacik "I/O error on %s\n", 2817606686eeSJosef Bacik rcu_str_deref(device->name)); 28181259ab75SChris Mason /* note, we dont' set_buffer_write_io_error because we have 28191259ab75SChris Mason * our own ways of dealing with the IO errors 28201259ab75SChris Mason */ 2821f2984462SChris Mason clear_buffer_uptodate(bh); 2822442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); 2823f2984462SChris Mason } 2824f2984462SChris Mason unlock_buffer(bh); 2825f2984462SChris Mason put_bh(bh); 2826f2984462SChris Mason } 2827f2984462SChris Mason 2828a512bbf8SYan Zheng struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) 2829a512bbf8SYan Zheng { 2830a512bbf8SYan Zheng struct buffer_head *bh; 2831a512bbf8SYan Zheng struct buffer_head *latest = NULL; 2832a512bbf8SYan Zheng struct btrfs_super_block *super; 2833a512bbf8SYan Zheng int i; 2834a512bbf8SYan Zheng u64 transid = 0; 2835a512bbf8SYan Zheng u64 bytenr; 2836a512bbf8SYan Zheng 2837a512bbf8SYan Zheng /* we would like to check all the supers, but that would make 2838a512bbf8SYan Zheng * a btrfs mount succeed after a mkfs from a different FS. 2839a512bbf8SYan Zheng * So, we need to add a special mount option to scan for 2840a512bbf8SYan Zheng * later supers, using BTRFS_SUPER_MIRROR_MAX instead 2841a512bbf8SYan Zheng */ 2842a512bbf8SYan Zheng for (i = 0; i < 1; i++) { 2843a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 2844a512bbf8SYan Zheng if (bytenr + 4096 >= i_size_read(bdev->bd_inode)) 2845a512bbf8SYan Zheng break; 2846a512bbf8SYan Zheng bh = __bread(bdev, bytenr / 4096, 4096); 2847a512bbf8SYan Zheng if (!bh) 2848a512bbf8SYan Zheng continue; 2849a512bbf8SYan Zheng 2850a512bbf8SYan Zheng super = (struct btrfs_super_block *)bh->b_data; 2851a512bbf8SYan Zheng if (btrfs_super_bytenr(super) != bytenr || 2852cdb4c574SZach Brown super->magic != cpu_to_le64(BTRFS_MAGIC)) { 2853a512bbf8SYan Zheng brelse(bh); 2854a512bbf8SYan Zheng continue; 2855a512bbf8SYan Zheng } 2856a512bbf8SYan Zheng 2857a512bbf8SYan Zheng if (!latest || btrfs_super_generation(super) > transid) { 2858a512bbf8SYan Zheng brelse(latest); 2859a512bbf8SYan Zheng latest = bh; 2860a512bbf8SYan Zheng transid = btrfs_super_generation(super); 2861a512bbf8SYan Zheng } else { 2862a512bbf8SYan Zheng brelse(bh); 2863a512bbf8SYan Zheng } 2864a512bbf8SYan Zheng } 2865a512bbf8SYan Zheng return latest; 2866a512bbf8SYan Zheng } 2867a512bbf8SYan Zheng 28684eedeb75SHisashi Hifumi /* 28694eedeb75SHisashi Hifumi * this should be called twice, once with wait == 0 and 28704eedeb75SHisashi Hifumi * once with wait == 1. When wait == 0 is done, all the buffer heads 28714eedeb75SHisashi Hifumi * we write are pinned. 28724eedeb75SHisashi Hifumi * 28734eedeb75SHisashi Hifumi * They are released when wait == 1 is done. 28744eedeb75SHisashi Hifumi * max_mirrors must be the same for both runs, and it indicates how 28754eedeb75SHisashi Hifumi * many supers on this one device should be written. 28764eedeb75SHisashi Hifumi * 28774eedeb75SHisashi Hifumi * max_mirrors == 0 means to write them all. 28784eedeb75SHisashi Hifumi */ 2879a512bbf8SYan Zheng static int write_dev_supers(struct btrfs_device *device, 2880a512bbf8SYan Zheng struct btrfs_super_block *sb, 2881a512bbf8SYan Zheng int do_barriers, int wait, int max_mirrors) 2882a512bbf8SYan Zheng { 2883a512bbf8SYan Zheng struct buffer_head *bh; 2884a512bbf8SYan Zheng int i; 2885a512bbf8SYan Zheng int ret; 2886a512bbf8SYan Zheng int errors = 0; 2887a512bbf8SYan Zheng u32 crc; 2888a512bbf8SYan Zheng u64 bytenr; 2889a512bbf8SYan Zheng 2890a512bbf8SYan Zheng if (max_mirrors == 0) 2891a512bbf8SYan Zheng max_mirrors = BTRFS_SUPER_MIRROR_MAX; 2892a512bbf8SYan Zheng 2893a512bbf8SYan Zheng for (i = 0; i < max_mirrors; i++) { 2894a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 2895a512bbf8SYan Zheng if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes) 2896a512bbf8SYan Zheng break; 2897a512bbf8SYan Zheng 2898a512bbf8SYan Zheng if (wait) { 2899a512bbf8SYan Zheng bh = __find_get_block(device->bdev, bytenr / 4096, 2900a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 2901a512bbf8SYan Zheng BUG_ON(!bh); 2902a512bbf8SYan Zheng wait_on_buffer(bh); 29034eedeb75SHisashi Hifumi if (!buffer_uptodate(bh)) 29044eedeb75SHisashi Hifumi errors++; 29054eedeb75SHisashi Hifumi 29064eedeb75SHisashi Hifumi /* drop our reference */ 29074eedeb75SHisashi Hifumi brelse(bh); 29084eedeb75SHisashi Hifumi 29094eedeb75SHisashi Hifumi /* drop the reference from the wait == 0 run */ 2910a512bbf8SYan Zheng brelse(bh); 2911a512bbf8SYan Zheng continue; 2912a512bbf8SYan Zheng } else { 2913a512bbf8SYan Zheng btrfs_set_super_bytenr(sb, bytenr); 2914a512bbf8SYan Zheng 2915a512bbf8SYan Zheng crc = ~(u32)0; 2916a512bbf8SYan Zheng crc = btrfs_csum_data(NULL, (char *)sb + 2917a512bbf8SYan Zheng BTRFS_CSUM_SIZE, crc, 2918a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE - 2919a512bbf8SYan Zheng BTRFS_CSUM_SIZE); 2920a512bbf8SYan Zheng btrfs_csum_final(crc, sb->csum); 2921a512bbf8SYan Zheng 29224eedeb75SHisashi Hifumi /* 29234eedeb75SHisashi Hifumi * one reference for us, and we leave it for the 29244eedeb75SHisashi Hifumi * caller 29254eedeb75SHisashi Hifumi */ 2926a512bbf8SYan Zheng bh = __getblk(device->bdev, bytenr / 4096, 2927a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 2928a512bbf8SYan Zheng memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); 2929a512bbf8SYan Zheng 29304eedeb75SHisashi Hifumi /* one reference for submit_bh */ 2931a512bbf8SYan Zheng get_bh(bh); 29324eedeb75SHisashi Hifumi 29334eedeb75SHisashi Hifumi set_buffer_uptodate(bh); 2934a512bbf8SYan Zheng lock_buffer(bh); 2935a512bbf8SYan Zheng bh->b_end_io = btrfs_end_buffer_write_sync; 2936442a4f63SStefan Behrens bh->b_private = device; 2937a512bbf8SYan Zheng } 2938a512bbf8SYan Zheng 2939387125fcSChris Mason /* 2940387125fcSChris Mason * we fua the first super. The others we allow 2941387125fcSChris Mason * to go down lazy. 2942387125fcSChris Mason */ 294321adbd5cSStefan Behrens ret = btrfsic_submit_bh(WRITE_FUA, bh); 29444eedeb75SHisashi Hifumi if (ret) 2945a512bbf8SYan Zheng errors++; 2946a512bbf8SYan Zheng } 2947a512bbf8SYan Zheng return errors < i ? 0 : -1; 2948a512bbf8SYan Zheng } 2949a512bbf8SYan Zheng 2950387125fcSChris Mason /* 2951387125fcSChris Mason * endio for the write_dev_flush, this will wake anyone waiting 2952387125fcSChris Mason * for the barrier when it is done 2953387125fcSChris Mason */ 2954387125fcSChris Mason static void btrfs_end_empty_barrier(struct bio *bio, int err) 2955387125fcSChris Mason { 2956387125fcSChris Mason if (err) { 2957387125fcSChris Mason if (err == -EOPNOTSUPP) 2958387125fcSChris Mason set_bit(BIO_EOPNOTSUPP, &bio->bi_flags); 2959387125fcSChris Mason clear_bit(BIO_UPTODATE, &bio->bi_flags); 2960387125fcSChris Mason } 2961387125fcSChris Mason if (bio->bi_private) 2962387125fcSChris Mason complete(bio->bi_private); 2963387125fcSChris Mason bio_put(bio); 2964387125fcSChris Mason } 2965387125fcSChris Mason 2966387125fcSChris Mason /* 2967387125fcSChris Mason * trigger flushes for one the devices. If you pass wait == 0, the flushes are 2968387125fcSChris Mason * sent down. With wait == 1, it waits for the previous flush. 2969387125fcSChris Mason * 2970387125fcSChris Mason * any device where the flush fails with eopnotsupp are flagged as not-barrier 2971387125fcSChris Mason * capable 2972387125fcSChris Mason */ 2973387125fcSChris Mason static int write_dev_flush(struct btrfs_device *device, int wait) 2974387125fcSChris Mason { 2975387125fcSChris Mason struct bio *bio; 2976387125fcSChris Mason int ret = 0; 2977387125fcSChris Mason 2978387125fcSChris Mason if (device->nobarriers) 2979387125fcSChris Mason return 0; 2980387125fcSChris Mason 2981387125fcSChris Mason if (wait) { 2982387125fcSChris Mason bio = device->flush_bio; 2983387125fcSChris Mason if (!bio) 2984387125fcSChris Mason return 0; 2985387125fcSChris Mason 2986387125fcSChris Mason wait_for_completion(&device->flush_wait); 2987387125fcSChris Mason 2988387125fcSChris Mason if (bio_flagged(bio, BIO_EOPNOTSUPP)) { 2989606686eeSJosef Bacik printk_in_rcu("btrfs: disabling barriers on dev %s\n", 2990606686eeSJosef Bacik rcu_str_deref(device->name)); 2991387125fcSChris Mason device->nobarriers = 1; 29925af3e8ccSStefan Behrens } else if (!bio_flagged(bio, BIO_UPTODATE)) { 2993387125fcSChris Mason ret = -EIO; 2994442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, 2995442a4f63SStefan Behrens BTRFS_DEV_STAT_FLUSH_ERRS); 2996387125fcSChris Mason } 2997387125fcSChris Mason 2998387125fcSChris Mason /* drop the reference from the wait == 0 run */ 2999387125fcSChris Mason bio_put(bio); 3000387125fcSChris Mason device->flush_bio = NULL; 3001387125fcSChris Mason 3002387125fcSChris Mason return ret; 3003387125fcSChris Mason } 3004387125fcSChris Mason 3005387125fcSChris Mason /* 3006387125fcSChris Mason * one reference for us, and we leave it for the 3007387125fcSChris Mason * caller 3008387125fcSChris Mason */ 30099c017abcSJesper Juhl device->flush_bio = NULL; 3010387125fcSChris Mason bio = bio_alloc(GFP_NOFS, 0); 3011387125fcSChris Mason if (!bio) 3012387125fcSChris Mason return -ENOMEM; 3013387125fcSChris Mason 3014387125fcSChris Mason bio->bi_end_io = btrfs_end_empty_barrier; 3015387125fcSChris Mason bio->bi_bdev = device->bdev; 3016387125fcSChris Mason init_completion(&device->flush_wait); 3017387125fcSChris Mason bio->bi_private = &device->flush_wait; 3018387125fcSChris Mason device->flush_bio = bio; 3019387125fcSChris Mason 3020387125fcSChris Mason bio_get(bio); 302121adbd5cSStefan Behrens btrfsic_submit_bio(WRITE_FLUSH, bio); 3022387125fcSChris Mason 3023387125fcSChris Mason return 0; 3024387125fcSChris Mason } 3025387125fcSChris Mason 3026387125fcSChris Mason /* 3027387125fcSChris Mason * send an empty flush down to each device in parallel, 3028387125fcSChris Mason * then wait for them 3029387125fcSChris Mason */ 3030387125fcSChris Mason static int barrier_all_devices(struct btrfs_fs_info *info) 3031387125fcSChris Mason { 3032387125fcSChris Mason struct list_head *head; 3033387125fcSChris Mason struct btrfs_device *dev; 30345af3e8ccSStefan Behrens int errors_send = 0; 30355af3e8ccSStefan Behrens int errors_wait = 0; 3036387125fcSChris Mason int ret; 3037387125fcSChris Mason 3038387125fcSChris Mason /* send down all the barriers */ 3039387125fcSChris Mason head = &info->fs_devices->devices; 3040387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3041387125fcSChris Mason if (!dev->bdev) { 30425af3e8ccSStefan Behrens errors_send++; 3043387125fcSChris Mason continue; 3044387125fcSChris Mason } 3045387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3046387125fcSChris Mason continue; 3047387125fcSChris Mason 3048387125fcSChris Mason ret = write_dev_flush(dev, 0); 3049387125fcSChris Mason if (ret) 30505af3e8ccSStefan Behrens errors_send++; 3051387125fcSChris Mason } 3052387125fcSChris Mason 3053387125fcSChris Mason /* wait for all the barriers */ 3054387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3055387125fcSChris Mason if (!dev->bdev) { 30565af3e8ccSStefan Behrens errors_wait++; 3057387125fcSChris Mason continue; 3058387125fcSChris Mason } 3059387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3060387125fcSChris Mason continue; 3061387125fcSChris Mason 3062387125fcSChris Mason ret = write_dev_flush(dev, 1); 3063387125fcSChris Mason if (ret) 30645af3e8ccSStefan Behrens errors_wait++; 3065387125fcSChris Mason } 30665af3e8ccSStefan Behrens if (errors_send > info->num_tolerated_disk_barrier_failures || 30675af3e8ccSStefan Behrens errors_wait > info->num_tolerated_disk_barrier_failures) 3068387125fcSChris Mason return -EIO; 3069387125fcSChris Mason return 0; 3070387125fcSChris Mason } 3071387125fcSChris Mason 30725af3e8ccSStefan Behrens int btrfs_calc_num_tolerated_disk_barrier_failures( 30735af3e8ccSStefan Behrens struct btrfs_fs_info *fs_info) 30745af3e8ccSStefan Behrens { 30755af3e8ccSStefan Behrens struct btrfs_ioctl_space_info space; 30765af3e8ccSStefan Behrens struct btrfs_space_info *sinfo; 30775af3e8ccSStefan Behrens u64 types[] = {BTRFS_BLOCK_GROUP_DATA, 30785af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_SYSTEM, 30795af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_METADATA, 30805af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; 30815af3e8ccSStefan Behrens int num_types = 4; 30825af3e8ccSStefan Behrens int i; 30835af3e8ccSStefan Behrens int c; 30845af3e8ccSStefan Behrens int num_tolerated_disk_barrier_failures = 30855af3e8ccSStefan Behrens (int)fs_info->fs_devices->num_devices; 30865af3e8ccSStefan Behrens 30875af3e8ccSStefan Behrens for (i = 0; i < num_types; i++) { 30885af3e8ccSStefan Behrens struct btrfs_space_info *tmp; 30895af3e8ccSStefan Behrens 30905af3e8ccSStefan Behrens sinfo = NULL; 30915af3e8ccSStefan Behrens rcu_read_lock(); 30925af3e8ccSStefan Behrens list_for_each_entry_rcu(tmp, &fs_info->space_info, list) { 30935af3e8ccSStefan Behrens if (tmp->flags == types[i]) { 30945af3e8ccSStefan Behrens sinfo = tmp; 30955af3e8ccSStefan Behrens break; 30965af3e8ccSStefan Behrens } 30975af3e8ccSStefan Behrens } 30985af3e8ccSStefan Behrens rcu_read_unlock(); 30995af3e8ccSStefan Behrens 31005af3e8ccSStefan Behrens if (!sinfo) 31015af3e8ccSStefan Behrens continue; 31025af3e8ccSStefan Behrens 31035af3e8ccSStefan Behrens down_read(&sinfo->groups_sem); 31045af3e8ccSStefan Behrens for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { 31055af3e8ccSStefan Behrens if (!list_empty(&sinfo->block_groups[c])) { 31065af3e8ccSStefan Behrens u64 flags; 31075af3e8ccSStefan Behrens 31085af3e8ccSStefan Behrens btrfs_get_block_group_info( 31095af3e8ccSStefan Behrens &sinfo->block_groups[c], &space); 31105af3e8ccSStefan Behrens if (space.total_bytes == 0 || 31115af3e8ccSStefan Behrens space.used_bytes == 0) 31125af3e8ccSStefan Behrens continue; 31135af3e8ccSStefan Behrens flags = space.flags; 31145af3e8ccSStefan Behrens /* 31155af3e8ccSStefan Behrens * return 31165af3e8ccSStefan Behrens * 0: if dup, single or RAID0 is configured for 31175af3e8ccSStefan Behrens * any of metadata, system or data, else 31185af3e8ccSStefan Behrens * 1: if RAID5 is configured, or if RAID1 or 31195af3e8ccSStefan Behrens * RAID10 is configured and only two mirrors 31205af3e8ccSStefan Behrens * are used, else 31215af3e8ccSStefan Behrens * 2: if RAID6 is configured, else 31225af3e8ccSStefan Behrens * num_mirrors - 1: if RAID1 or RAID10 is 31235af3e8ccSStefan Behrens * configured and more than 31245af3e8ccSStefan Behrens * 2 mirrors are used. 31255af3e8ccSStefan Behrens */ 31265af3e8ccSStefan Behrens if (num_tolerated_disk_barrier_failures > 0 && 31275af3e8ccSStefan Behrens ((flags & (BTRFS_BLOCK_GROUP_DUP | 31285af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_RAID0)) || 31295af3e8ccSStefan Behrens ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) 31305af3e8ccSStefan Behrens == 0))) 31315af3e8ccSStefan Behrens num_tolerated_disk_barrier_failures = 0; 313253b381b3SDavid Woodhouse else if (num_tolerated_disk_barrier_failures > 1) { 313353b381b3SDavid Woodhouse if (flags & (BTRFS_BLOCK_GROUP_RAID1 | 313453b381b3SDavid Woodhouse BTRFS_BLOCK_GROUP_RAID5 | 313553b381b3SDavid Woodhouse BTRFS_BLOCK_GROUP_RAID10)) { 31365af3e8ccSStefan Behrens num_tolerated_disk_barrier_failures = 1; 313753b381b3SDavid Woodhouse } else if (flags & 313853b381b3SDavid Woodhouse BTRFS_BLOCK_GROUP_RAID5) { 313953b381b3SDavid Woodhouse num_tolerated_disk_barrier_failures = 2; 314053b381b3SDavid Woodhouse } 314153b381b3SDavid Woodhouse } 31425af3e8ccSStefan Behrens } 31435af3e8ccSStefan Behrens } 31445af3e8ccSStefan Behrens up_read(&sinfo->groups_sem); 31455af3e8ccSStefan Behrens } 31465af3e8ccSStefan Behrens 31475af3e8ccSStefan Behrens return num_tolerated_disk_barrier_failures; 31485af3e8ccSStefan Behrens } 31495af3e8ccSStefan Behrens 3150a512bbf8SYan Zheng int write_all_supers(struct btrfs_root *root, int max_mirrors) 3151f2984462SChris Mason { 3152e5e9a520SChris Mason struct list_head *head; 3153f2984462SChris Mason struct btrfs_device *dev; 3154a061fc8dSChris Mason struct btrfs_super_block *sb; 3155f2984462SChris Mason struct btrfs_dev_item *dev_item; 3156f2984462SChris Mason int ret; 3157f2984462SChris Mason int do_barriers; 3158a236aed1SChris Mason int max_errors; 3159a236aed1SChris Mason int total_errors = 0; 3160a061fc8dSChris Mason u64 flags; 3161f2984462SChris Mason 31626c41761fSDavid Sterba max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; 3163f2984462SChris Mason do_barriers = !btrfs_test_opt(root, NOBARRIER); 3164af31f5e5SChris Mason backup_super_roots(root->fs_info); 3165f2984462SChris Mason 31666c41761fSDavid Sterba sb = root->fs_info->super_for_commit; 3167a061fc8dSChris Mason dev_item = &sb->dev_item; 3168e5e9a520SChris Mason 3169174ba509SChris Mason mutex_lock(&root->fs_info->fs_devices->device_list_mutex); 3170e5e9a520SChris Mason head = &root->fs_info->fs_devices->devices; 3171387125fcSChris Mason 31725af3e8ccSStefan Behrens if (do_barriers) { 31735af3e8ccSStefan Behrens ret = barrier_all_devices(root->fs_info); 31745af3e8ccSStefan Behrens if (ret) { 31755af3e8ccSStefan Behrens mutex_unlock( 31765af3e8ccSStefan Behrens &root->fs_info->fs_devices->device_list_mutex); 31775af3e8ccSStefan Behrens btrfs_error(root->fs_info, ret, 31785af3e8ccSStefan Behrens "errors while submitting device barriers."); 31795af3e8ccSStefan Behrens return ret; 31805af3e8ccSStefan Behrens } 31815af3e8ccSStefan Behrens } 3182387125fcSChris Mason 31831f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3184dfe25020SChris Mason if (!dev->bdev) { 3185dfe25020SChris Mason total_errors++; 3186dfe25020SChris Mason continue; 3187dfe25020SChris Mason } 31882b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3189dfe25020SChris Mason continue; 3190dfe25020SChris Mason 31912b82032cSYan Zheng btrfs_set_stack_device_generation(dev_item, 0); 3192a061fc8dSChris Mason btrfs_set_stack_device_type(dev_item, dev->type); 3193a061fc8dSChris Mason btrfs_set_stack_device_id(dev_item, dev->devid); 3194a061fc8dSChris Mason btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes); 3195a061fc8dSChris Mason btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used); 3196a061fc8dSChris Mason btrfs_set_stack_device_io_align(dev_item, dev->io_align); 3197a061fc8dSChris Mason btrfs_set_stack_device_io_width(dev_item, dev->io_width); 3198a061fc8dSChris Mason btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); 3199a061fc8dSChris Mason memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); 32002b82032cSYan Zheng memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); 3201a512bbf8SYan Zheng 3202a061fc8dSChris Mason flags = btrfs_super_flags(sb); 3203a061fc8dSChris Mason btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); 3204f2984462SChris Mason 3205a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); 3206a236aed1SChris Mason if (ret) 3207a236aed1SChris Mason total_errors++; 3208f2984462SChris Mason } 3209a236aed1SChris Mason if (total_errors > max_errors) { 3210d397712bSChris Mason printk(KERN_ERR "btrfs: %d errors while writing supers\n", 3211d397712bSChris Mason total_errors); 321279787eaaSJeff Mahoney 321379787eaaSJeff Mahoney /* This shouldn't happen. FUA is masked off if unsupported */ 3214a236aed1SChris Mason BUG(); 3215a236aed1SChris Mason } 3216f2984462SChris Mason 3217a512bbf8SYan Zheng total_errors = 0; 32181f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3219dfe25020SChris Mason if (!dev->bdev) 3220dfe25020SChris Mason continue; 32212b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3222dfe25020SChris Mason continue; 3223dfe25020SChris Mason 3224a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); 3225a512bbf8SYan Zheng if (ret) 32261259ab75SChris Mason total_errors++; 3227f2984462SChris Mason } 3228174ba509SChris Mason mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 3229a236aed1SChris Mason if (total_errors > max_errors) { 323079787eaaSJeff Mahoney btrfs_error(root->fs_info, -EIO, 323179787eaaSJeff Mahoney "%d errors while writing supers", total_errors); 323279787eaaSJeff Mahoney return -EIO; 3233a236aed1SChris Mason } 3234f2984462SChris Mason return 0; 3235f2984462SChris Mason } 3236f2984462SChris Mason 3237a512bbf8SYan Zheng int write_ctree_super(struct btrfs_trans_handle *trans, 3238a512bbf8SYan Zheng struct btrfs_root *root, int max_mirrors) 3239cfaa7295SChris Mason { 3240e66f709bSChris Mason int ret; 32412c90e5d6SChris Mason 3242a512bbf8SYan Zheng ret = write_all_supers(root, max_mirrors); 32435f39d397SChris Mason return ret; 3244cfaa7295SChris Mason } 3245cfaa7295SChris Mason 3246143bede5SJeff Mahoney void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) 32472619ba1fSChris Mason { 32484df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 32492619ba1fSChris Mason radix_tree_delete(&fs_info->fs_roots_radix, 32502619ba1fSChris Mason (unsigned long)root->root_key.objectid); 32514df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 325276dda93cSYan, Zheng 325376dda93cSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) 325476dda93cSYan, Zheng synchronize_srcu(&fs_info->subvol_srcu); 325576dda93cSYan, Zheng 32563321719eSLiu Bo if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { 32573321719eSLiu Bo btrfs_free_log(NULL, root); 32583321719eSLiu Bo btrfs_free_log_root_tree(NULL, fs_info); 32593321719eSLiu Bo } 32603321719eSLiu Bo 3261581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_pinned); 3262581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_ctl); 32634df27c4dSYan, Zheng free_fs_root(root); 32644df27c4dSYan, Zheng } 32654df27c4dSYan, Zheng 32664df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root) 32674df27c4dSYan, Zheng { 326882d5902dSLi Zefan iput(root->cache_inode); 32694df27c4dSYan, Zheng WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); 32700ee5dc67SAl Viro if (root->anon_dev) 32710ee5dc67SAl Viro free_anon_bdev(root->anon_dev); 32725f39d397SChris Mason free_extent_buffer(root->node); 32735f39d397SChris Mason free_extent_buffer(root->commit_root); 3274581bb050SLi Zefan kfree(root->free_ino_ctl); 3275581bb050SLi Zefan kfree(root->free_ino_pinned); 327658176a96SJosef Bacik kfree(root->name); 32772619ba1fSChris Mason kfree(root); 32782619ba1fSChris Mason } 32792619ba1fSChris Mason 3280143bede5SJeff Mahoney static void del_fs_roots(struct btrfs_fs_info *fs_info) 32810f7d52f4SChris Mason { 32820f7d52f4SChris Mason int ret; 32830f7d52f4SChris Mason struct btrfs_root *gang[8]; 32840f7d52f4SChris Mason int i; 32850f7d52f4SChris Mason 328676dda93cSYan, Zheng while (!list_empty(&fs_info->dead_roots)) { 328776dda93cSYan, Zheng gang[0] = list_entry(fs_info->dead_roots.next, 328876dda93cSYan, Zheng struct btrfs_root, root_list); 328976dda93cSYan, Zheng list_del(&gang[0]->root_list); 329076dda93cSYan, Zheng 329176dda93cSYan, Zheng if (gang[0]->in_radix) { 329276dda93cSYan, Zheng btrfs_free_fs_root(fs_info, gang[0]); 329376dda93cSYan, Zheng } else { 329476dda93cSYan, Zheng free_extent_buffer(gang[0]->node); 329576dda93cSYan, Zheng free_extent_buffer(gang[0]->commit_root); 329676dda93cSYan, Zheng kfree(gang[0]); 329776dda93cSYan, Zheng } 329876dda93cSYan, Zheng } 329976dda93cSYan, Zheng 33000f7d52f4SChris Mason while (1) { 33010f7d52f4SChris Mason ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 33020f7d52f4SChris Mason (void **)gang, 0, 33030f7d52f4SChris Mason ARRAY_SIZE(gang)); 33040f7d52f4SChris Mason if (!ret) 33050f7d52f4SChris Mason break; 33062619ba1fSChris Mason for (i = 0; i < ret; i++) 33075eda7b5eSChris Mason btrfs_free_fs_root(fs_info, gang[i]); 33080f7d52f4SChris Mason } 33090f7d52f4SChris Mason } 3310b4100d64SChris Mason 3311c146afadSYan Zheng int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) 3312c146afadSYan Zheng { 3313c146afadSYan Zheng u64 root_objectid = 0; 3314c146afadSYan Zheng struct btrfs_root *gang[8]; 3315c146afadSYan Zheng int i; 3316c146afadSYan Zheng int ret; 3317c146afadSYan Zheng 3318c146afadSYan Zheng while (1) { 3319c146afadSYan Zheng ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 3320c146afadSYan Zheng (void **)gang, root_objectid, 3321c146afadSYan Zheng ARRAY_SIZE(gang)); 3322c146afadSYan Zheng if (!ret) 3323c146afadSYan Zheng break; 33245d4f98a2SYan Zheng 33255d4f98a2SYan Zheng root_objectid = gang[ret - 1]->root_key.objectid + 1; 3326c146afadSYan Zheng for (i = 0; i < ret; i++) { 332766b4ffd1SJosef Bacik int err; 332866b4ffd1SJosef Bacik 3329c146afadSYan Zheng root_objectid = gang[i]->root_key.objectid; 333066b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(gang[i]); 333166b4ffd1SJosef Bacik if (err) 333266b4ffd1SJosef Bacik return err; 3333c146afadSYan Zheng } 3334c146afadSYan Zheng root_objectid++; 3335c146afadSYan Zheng } 3336c146afadSYan Zheng return 0; 3337c146afadSYan Zheng } 3338c146afadSYan Zheng 3339c146afadSYan Zheng int btrfs_commit_super(struct btrfs_root *root) 3340c146afadSYan Zheng { 3341c146afadSYan Zheng struct btrfs_trans_handle *trans; 3342c146afadSYan Zheng int ret; 3343c146afadSYan Zheng 3344c146afadSYan Zheng mutex_lock(&root->fs_info->cleaner_mutex); 334524bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 3346c146afadSYan Zheng btrfs_clean_old_snapshots(root); 3347c146afadSYan Zheng mutex_unlock(&root->fs_info->cleaner_mutex); 3348c71bf099SYan, Zheng 3349c71bf099SYan, Zheng /* wait until ongoing cleanup work done */ 3350c71bf099SYan, Zheng down_write(&root->fs_info->cleanup_work_sem); 3351c71bf099SYan, Zheng up_write(&root->fs_info->cleanup_work_sem); 3352c71bf099SYan, Zheng 33537a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 33543612b495STsutomu Itoh if (IS_ERR(trans)) 33553612b495STsutomu Itoh return PTR_ERR(trans); 3356c146afadSYan Zheng ret = btrfs_commit_transaction(trans, root); 335779787eaaSJeff Mahoney if (ret) 335879787eaaSJeff Mahoney return ret; 3359c146afadSYan Zheng /* run commit again to drop the original snapshot */ 33607a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 33613612b495STsutomu Itoh if (IS_ERR(trans)) 33623612b495STsutomu Itoh return PTR_ERR(trans); 336379787eaaSJeff Mahoney ret = btrfs_commit_transaction(trans, root); 336479787eaaSJeff Mahoney if (ret) 336579787eaaSJeff Mahoney return ret; 3366c146afadSYan Zheng ret = btrfs_write_and_wait_transaction(NULL, root); 336779787eaaSJeff Mahoney if (ret) { 336879787eaaSJeff Mahoney btrfs_error(root->fs_info, ret, 336979787eaaSJeff Mahoney "Failed to sync btree inode to disk."); 337079787eaaSJeff Mahoney return ret; 337179787eaaSJeff Mahoney } 3372c146afadSYan Zheng 3373a512bbf8SYan Zheng ret = write_ctree_super(NULL, root, 0); 3374c146afadSYan Zheng return ret; 3375c146afadSYan Zheng } 3376c146afadSYan Zheng 3377e20d96d6SChris Mason int close_ctree(struct btrfs_root *root) 3378eb60ceacSChris Mason { 33790f7d52f4SChris Mason struct btrfs_fs_info *fs_info = root->fs_info; 3380c146afadSYan Zheng int ret; 3381e089f05cSChris Mason 3382facda1e7SChris Mason fs_info->closing = 1; 3383a2135011SChris Mason smp_mb(); 3384a2135011SChris Mason 3385837d5b6eSIlya Dryomov /* pause restriper - we want to resume on mount */ 3386aa1b8cd4SStefan Behrens btrfs_pause_balance(fs_info); 3387837d5b6eSIlya Dryomov 33888dabb742SStefan Behrens btrfs_dev_replace_suspend_for_unmount(fs_info); 33898dabb742SStefan Behrens 3390aa1b8cd4SStefan Behrens btrfs_scrub_cancel(fs_info); 33914cb5300bSChris Mason 33924cb5300bSChris Mason /* wait for any defraggers to finish */ 33934cb5300bSChris Mason wait_event(fs_info->transaction_wait, 33944cb5300bSChris Mason (atomic_read(&fs_info->defrag_running) == 0)); 33954cb5300bSChris Mason 33964cb5300bSChris Mason /* clear out the rbtree of defraggable inodes */ 339726176e7cSMiao Xie btrfs_cleanup_defrag_inodes(fs_info); 33984cb5300bSChris Mason 3399c146afadSYan Zheng if (!(fs_info->sb->s_flags & MS_RDONLY)) { 3400c146afadSYan Zheng ret = btrfs_commit_super(root); 3401d397712bSChris Mason if (ret) 3402d397712bSChris Mason printk(KERN_ERR "btrfs: commit super ret %d\n", ret); 3403c146afadSYan Zheng } 3404ed2ff2cbSChris Mason 340587533c47SMiao Xie if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) 340668ce9682SStefan Behrens btrfs_error_commit_super(root); 3407acce952bSliubo 3408300e4f8aSJosef Bacik btrfs_put_block_group_cache(fs_info); 3409300e4f8aSJosef Bacik 3410e3029d9fSAl Viro kthread_stop(fs_info->transaction_kthread); 3411e3029d9fSAl Viro kthread_stop(fs_info->cleaner_kthread); 34128929ecfaSYan, Zheng 3413f25784b3SYan Zheng fs_info->closing = 2; 3414f25784b3SYan Zheng smp_mb(); 3415f25784b3SYan Zheng 3416bcef60f2SArne Jansen btrfs_free_qgroup_config(root->fs_info); 3417bcef60f2SArne Jansen 3418963d678bSMiao Xie if (percpu_counter_sum(&fs_info->delalloc_bytes)) { 3419963d678bSMiao Xie printk(KERN_INFO "btrfs: at unmount delalloc count %lld\n", 3420963d678bSMiao Xie percpu_counter_sum(&fs_info->delalloc_bytes)); 3421b0c68f8bSChris Mason } 342231153d81SYan Zheng 34235f39d397SChris Mason free_extent_buffer(fs_info->extent_root->node); 34245d4f98a2SYan Zheng free_extent_buffer(fs_info->extent_root->commit_root); 34255f39d397SChris Mason free_extent_buffer(fs_info->tree_root->node); 34265d4f98a2SYan Zheng free_extent_buffer(fs_info->tree_root->commit_root); 3427e3029d9fSAl Viro free_extent_buffer(fs_info->chunk_root->node); 3428e3029d9fSAl Viro free_extent_buffer(fs_info->chunk_root->commit_root); 3429e3029d9fSAl Viro free_extent_buffer(fs_info->dev_root->node); 3430e3029d9fSAl Viro free_extent_buffer(fs_info->dev_root->commit_root); 3431e3029d9fSAl Viro free_extent_buffer(fs_info->csum_root->node); 3432e3029d9fSAl Viro free_extent_buffer(fs_info->csum_root->commit_root); 3433bcef60f2SArne Jansen if (fs_info->quota_root) { 3434bcef60f2SArne Jansen free_extent_buffer(fs_info->quota_root->node); 3435bcef60f2SArne Jansen free_extent_buffer(fs_info->quota_root->commit_root); 3436bcef60f2SArne Jansen } 3437d20f7043SChris Mason 3438e3029d9fSAl Viro btrfs_free_block_groups(fs_info); 3439c146afadSYan Zheng 34400f7d52f4SChris Mason del_fs_roots(fs_info); 3441d10c5f31SChris Mason 3442c146afadSYan Zheng iput(fs_info->btree_inode); 34439ad6b7bcSChris Mason 344461d92c32SChris Mason btrfs_stop_workers(&fs_info->generic_worker); 3445247e743cSChris Mason btrfs_stop_workers(&fs_info->fixup_workers); 3446771ed689SChris Mason btrfs_stop_workers(&fs_info->delalloc_workers); 34478b712842SChris Mason btrfs_stop_workers(&fs_info->workers); 34488b712842SChris Mason btrfs_stop_workers(&fs_info->endio_workers); 3449d20f7043SChris Mason btrfs_stop_workers(&fs_info->endio_meta_workers); 345053b381b3SDavid Woodhouse btrfs_stop_workers(&fs_info->endio_raid56_workers); 345153b381b3SDavid Woodhouse btrfs_stop_workers(&fs_info->rmw_workers); 3452cad321adSChris Mason btrfs_stop_workers(&fs_info->endio_meta_write_workers); 3453e6dcd2dcSChris Mason btrfs_stop_workers(&fs_info->endio_write_workers); 34540cb59c99SJosef Bacik btrfs_stop_workers(&fs_info->endio_freespace_worker); 34551cc127b5SChris Mason btrfs_stop_workers(&fs_info->submit_workers); 345616cdcec7SMiao Xie btrfs_stop_workers(&fs_info->delayed_workers); 3457bab39bf9SJosef Bacik btrfs_stop_workers(&fs_info->caching_workers); 345890519d66SArne Jansen btrfs_stop_workers(&fs_info->readahead_workers); 34598ccf6f19SMiao Xie btrfs_stop_workers(&fs_info->flush_workers); 3460d6bfde87SChris Mason 346121adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 346221adbd5cSStefan Behrens if (btrfs_test_opt(root, CHECK_INTEGRITY)) 346321adbd5cSStefan Behrens btrfsic_unmount(root, fs_info->fs_devices); 346421adbd5cSStefan Behrens #endif 346521adbd5cSStefan Behrens 3466dfe25020SChris Mason btrfs_close_devices(fs_info->fs_devices); 34670b86a832SChris Mason btrfs_mapping_tree_free(&fs_info->mapping_tree); 3468b248a415SChris Mason 3469e2d84521SMiao Xie percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 3470963d678bSMiao Xie percpu_counter_destroy(&fs_info->delalloc_bytes); 347104160088SChris Mason bdi_destroy(&fs_info->bdi); 347276dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 34730b86a832SChris Mason 347453b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 347553b381b3SDavid Woodhouse 3476eb60ceacSChris Mason return 0; 3477eb60ceacSChris Mason } 3478eb60ceacSChris Mason 3479b9fab919SChris Mason int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, 3480b9fab919SChris Mason int atomic) 3481ccd467d6SChris Mason { 34821259ab75SChris Mason int ret; 3483727011e0SChris Mason struct inode *btree_inode = buf->pages[0]->mapping->host; 34841259ab75SChris Mason 34850b32f4bbSJosef Bacik ret = extent_buffer_uptodate(buf); 34861259ab75SChris Mason if (!ret) 34871259ab75SChris Mason return ret; 34881259ab75SChris Mason 34891259ab75SChris Mason ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, 3490b9fab919SChris Mason parent_transid, atomic); 3491b9fab919SChris Mason if (ret == -EAGAIN) 3492b9fab919SChris Mason return ret; 34931259ab75SChris Mason return !ret; 34945f39d397SChris Mason } 34956702ed49SChris Mason 34965f39d397SChris Mason int btrfs_set_buffer_uptodate(struct extent_buffer *buf) 34975f39d397SChris Mason { 34980b32f4bbSJosef Bacik return set_extent_buffer_uptodate(buf); 34995f39d397SChris Mason } 35005f39d397SChris Mason 35015f39d397SChris Mason void btrfs_mark_buffer_dirty(struct extent_buffer *buf) 35025f39d397SChris Mason { 3503727011e0SChris Mason struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; 35045f39d397SChris Mason u64 transid = btrfs_header_generation(buf); 3505b9473439SChris Mason int was_dirty; 3506b4ce94deSChris Mason 3507b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 350831b1a2bdSJulia Lawall if (transid != root->fs_info->generation) 350931b1a2bdSJulia Lawall WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, " 3510d397712bSChris Mason "found %llu running %llu\n", 3511db94535dSChris Mason (unsigned long long)buf->start, 3512d397712bSChris Mason (unsigned long long)transid, 3513d397712bSChris Mason (unsigned long long)root->fs_info->generation); 35140b32f4bbSJosef Bacik was_dirty = set_extent_buffer_dirty(buf); 3515e2d84521SMiao Xie if (!was_dirty) 3516e2d84521SMiao Xie __percpu_counter_add(&root->fs_info->dirty_metadata_bytes, 3517e2d84521SMiao Xie buf->len, 3518e2d84521SMiao Xie root->fs_info->dirty_metadata_batch); 3519eb60ceacSChris Mason } 3520eb60ceacSChris Mason 3521b53d3f5dSLiu Bo static void __btrfs_btree_balance_dirty(struct btrfs_root *root, 3522b53d3f5dSLiu Bo int flush_delayed) 352335b7e476SChris Mason { 3524188de649SChris Mason /* 3525188de649SChris Mason * looks as though older kernels can get into trouble with 3526188de649SChris Mason * this code, they end up stuck in balance_dirty_pages forever 3527188de649SChris Mason */ 3528e2d84521SMiao Xie int ret; 3529d6bfde87SChris Mason 35306933c02eSJens Axboe if (current->flags & PF_MEMALLOC) 3531d6bfde87SChris Mason return; 3532d6bfde87SChris Mason 3533b53d3f5dSLiu Bo if (flush_delayed) 353416cdcec7SMiao Xie btrfs_balance_delayed_items(root); 353516cdcec7SMiao Xie 3536e2d84521SMiao Xie ret = percpu_counter_compare(&root->fs_info->dirty_metadata_bytes, 3537e2d84521SMiao Xie BTRFS_DIRTY_METADATA_THRESH); 3538e2d84521SMiao Xie if (ret > 0) { 3539d0e1d66bSNamjae Jeon balance_dirty_pages_ratelimited( 3540d0e1d66bSNamjae Jeon root->fs_info->btree_inode->i_mapping); 354116cdcec7SMiao Xie } 354216cdcec7SMiao Xie return; 354316cdcec7SMiao Xie } 354416cdcec7SMiao Xie 3545b53d3f5dSLiu Bo void btrfs_btree_balance_dirty(struct btrfs_root *root) 354616cdcec7SMiao Xie { 3547b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 1); 354835b7e476SChris Mason } 3549b53d3f5dSLiu Bo 3550b53d3f5dSLiu Bo void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root) 3551b53d3f5dSLiu Bo { 3552b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 0); 3553d6bfde87SChris Mason } 35546b80053dSChris Mason 3555ca7a79adSChris Mason int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) 35566b80053dSChris Mason { 3557727011e0SChris Mason struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; 35580b32f4bbSJosef Bacik return btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 35596b80053dSChris Mason } 35600da5468fSChris Mason 3561fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 3562acce952bSliubo int read_only) 3563acce952bSliubo { 3564fcd1f065SDavid Sterba if (btrfs_super_csum_type(fs_info->super_copy) >= ARRAY_SIZE(btrfs_csum_sizes)) { 3565fcd1f065SDavid Sterba printk(KERN_ERR "btrfs: unsupported checksum algorithm\n"); 3566fcd1f065SDavid Sterba return -EINVAL; 3567fcd1f065SDavid Sterba } 3568acce952bSliubo 3569fcd1f065SDavid Sterba if (read_only) 3570fcd1f065SDavid Sterba return 0; 3571fcd1f065SDavid Sterba 3572fcd1f065SDavid Sterba return 0; 3573fcd1f065SDavid Sterba } 3574fcd1f065SDavid Sterba 357568ce9682SStefan Behrens void btrfs_error_commit_super(struct btrfs_root *root) 3576acce952bSliubo { 3577acce952bSliubo mutex_lock(&root->fs_info->cleaner_mutex); 3578acce952bSliubo btrfs_run_delayed_iputs(root); 3579acce952bSliubo mutex_unlock(&root->fs_info->cleaner_mutex); 3580acce952bSliubo 3581acce952bSliubo down_write(&root->fs_info->cleanup_work_sem); 3582acce952bSliubo up_write(&root->fs_info->cleanup_work_sem); 3583acce952bSliubo 3584acce952bSliubo /* cleanup FS via transaction */ 3585acce952bSliubo btrfs_cleanup_transaction(root); 3586acce952bSliubo } 3587acce952bSliubo 3588569e0f35SJosef Bacik static void btrfs_destroy_ordered_operations(struct btrfs_transaction *t, 3589569e0f35SJosef Bacik struct btrfs_root *root) 3590acce952bSliubo { 3591acce952bSliubo struct btrfs_inode *btrfs_inode; 3592acce952bSliubo struct list_head splice; 3593acce952bSliubo 3594acce952bSliubo INIT_LIST_HEAD(&splice); 3595acce952bSliubo 3596acce952bSliubo mutex_lock(&root->fs_info->ordered_operations_mutex); 3597acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3598acce952bSliubo 3599569e0f35SJosef Bacik list_splice_init(&t->ordered_operations, &splice); 3600acce952bSliubo while (!list_empty(&splice)) { 3601acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3602acce952bSliubo ordered_operations); 3603acce952bSliubo 3604acce952bSliubo list_del_init(&btrfs_inode->ordered_operations); 3605acce952bSliubo 3606acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3607acce952bSliubo } 3608acce952bSliubo 3609acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3610acce952bSliubo mutex_unlock(&root->fs_info->ordered_operations_mutex); 3611acce952bSliubo } 3612acce952bSliubo 3613143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root) 3614acce952bSliubo { 3615acce952bSliubo struct btrfs_ordered_extent *ordered; 3616acce952bSliubo 3617acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3618779880efSJosef Bacik /* 3619779880efSJosef Bacik * This will just short circuit the ordered completion stuff which will 3620779880efSJosef Bacik * make sure the ordered extent gets properly cleaned up. 3621779880efSJosef Bacik */ 3622779880efSJosef Bacik list_for_each_entry(ordered, &root->fs_info->ordered_extents, 3623779880efSJosef Bacik root_extent_list) 3624779880efSJosef Bacik set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); 3625acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3626acce952bSliubo } 3627acce952bSliubo 362879787eaaSJeff Mahoney int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 3629acce952bSliubo struct btrfs_root *root) 3630acce952bSliubo { 3631acce952bSliubo struct rb_node *node; 3632acce952bSliubo struct btrfs_delayed_ref_root *delayed_refs; 3633acce952bSliubo struct btrfs_delayed_ref_node *ref; 3634acce952bSliubo int ret = 0; 3635acce952bSliubo 3636acce952bSliubo delayed_refs = &trans->delayed_refs; 3637acce952bSliubo 3638acce952bSliubo spin_lock(&delayed_refs->lock); 3639acce952bSliubo if (delayed_refs->num_entries == 0) { 3640cfece4dbSDavid Sterba spin_unlock(&delayed_refs->lock); 3641acce952bSliubo printk(KERN_INFO "delayed_refs has NO entry\n"); 3642acce952bSliubo return ret; 3643acce952bSliubo } 3644acce952bSliubo 3645b939d1abSJosef Bacik while ((node = rb_first(&delayed_refs->root)) != NULL) { 3646eb12db69SJosef Bacik struct btrfs_delayed_ref_head *head = NULL; 3647acce952bSliubo 3648eb12db69SJosef Bacik ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node); 3649acce952bSliubo atomic_set(&ref->refs, 1); 3650acce952bSliubo if (btrfs_delayed_ref_is_head(ref)) { 3651acce952bSliubo 3652acce952bSliubo head = btrfs_delayed_node_to_head(ref); 3653b939d1abSJosef Bacik if (!mutex_trylock(&head->mutex)) { 3654b939d1abSJosef Bacik atomic_inc(&ref->refs); 365579787eaaSJeff Mahoney spin_unlock(&delayed_refs->lock); 3656b939d1abSJosef Bacik 3657b939d1abSJosef Bacik /* Need to wait for the delayed ref to run */ 3658acce952bSliubo mutex_lock(&head->mutex); 3659b939d1abSJosef Bacik mutex_unlock(&head->mutex); 3660b939d1abSJosef Bacik btrfs_put_delayed_ref(ref); 3661b939d1abSJosef Bacik 3662e18fca73SJosef Bacik spin_lock(&delayed_refs->lock); 3663b939d1abSJosef Bacik continue; 3664b939d1abSJosef Bacik } 3665b939d1abSJosef Bacik 366678a6184aSMiao Xie btrfs_free_delayed_extent_op(head->extent_op); 3667acce952bSliubo delayed_refs->num_heads--; 3668acce952bSliubo if (list_empty(&head->cluster)) 3669acce952bSliubo delayed_refs->num_heads_ready--; 3670acce952bSliubo list_del_init(&head->cluster); 3671acce952bSliubo } 3672eb12db69SJosef Bacik 3673b939d1abSJosef Bacik ref->in_tree = 0; 3674b939d1abSJosef Bacik rb_erase(&ref->rb_node, &delayed_refs->root); 3675b939d1abSJosef Bacik delayed_refs->num_entries--; 3676eb12db69SJosef Bacik if (head) 3677eb12db69SJosef Bacik mutex_unlock(&head->mutex); 3678acce952bSliubo spin_unlock(&delayed_refs->lock); 3679acce952bSliubo btrfs_put_delayed_ref(ref); 3680acce952bSliubo 3681acce952bSliubo cond_resched(); 3682acce952bSliubo spin_lock(&delayed_refs->lock); 3683acce952bSliubo } 3684acce952bSliubo 3685acce952bSliubo spin_unlock(&delayed_refs->lock); 3686acce952bSliubo 3687acce952bSliubo return ret; 3688acce952bSliubo } 3689acce952bSliubo 3690143bede5SJeff Mahoney static void btrfs_destroy_pending_snapshots(struct btrfs_transaction *t) 3691acce952bSliubo { 3692acce952bSliubo struct btrfs_pending_snapshot *snapshot; 3693acce952bSliubo struct list_head splice; 3694acce952bSliubo 3695acce952bSliubo INIT_LIST_HEAD(&splice); 3696acce952bSliubo 3697acce952bSliubo list_splice_init(&t->pending_snapshots, &splice); 3698acce952bSliubo 3699acce952bSliubo while (!list_empty(&splice)) { 3700acce952bSliubo snapshot = list_entry(splice.next, 3701acce952bSliubo struct btrfs_pending_snapshot, 3702acce952bSliubo list); 3703acce952bSliubo 3704acce952bSliubo list_del_init(&snapshot->list); 3705acce952bSliubo 3706acce952bSliubo kfree(snapshot); 3707acce952bSliubo } 3708acce952bSliubo } 3709acce952bSliubo 3710143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) 3711acce952bSliubo { 3712acce952bSliubo struct btrfs_inode *btrfs_inode; 3713acce952bSliubo struct list_head splice; 3714acce952bSliubo 3715acce952bSliubo INIT_LIST_HEAD(&splice); 3716acce952bSliubo 3717acce952bSliubo spin_lock(&root->fs_info->delalloc_lock); 37185be76758SDavid Sterba list_splice_init(&root->fs_info->delalloc_inodes, &splice); 3719acce952bSliubo 3720acce952bSliubo while (!list_empty(&splice)) { 3721acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3722acce952bSliubo delalloc_inodes); 3723acce952bSliubo 3724acce952bSliubo list_del_init(&btrfs_inode->delalloc_inodes); 3725df0af1a5SMiao Xie clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, 3726df0af1a5SMiao Xie &btrfs_inode->runtime_flags); 3727acce952bSliubo 3728acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3729acce952bSliubo } 3730acce952bSliubo 3731acce952bSliubo spin_unlock(&root->fs_info->delalloc_lock); 3732acce952bSliubo } 3733acce952bSliubo 3734acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 3735acce952bSliubo struct extent_io_tree *dirty_pages, 3736acce952bSliubo int mark) 3737acce952bSliubo { 3738acce952bSliubo int ret; 3739acce952bSliubo struct page *page; 3740acce952bSliubo struct inode *btree_inode = root->fs_info->btree_inode; 3741acce952bSliubo struct extent_buffer *eb; 3742acce952bSliubo u64 start = 0; 3743acce952bSliubo u64 end; 3744acce952bSliubo u64 offset; 3745acce952bSliubo unsigned long index; 3746acce952bSliubo 3747acce952bSliubo while (1) { 3748acce952bSliubo ret = find_first_extent_bit(dirty_pages, start, &start, &end, 3749e6138876SJosef Bacik mark, NULL); 3750acce952bSliubo if (ret) 3751acce952bSliubo break; 3752acce952bSliubo 3753acce952bSliubo clear_extent_bits(dirty_pages, start, end, mark, GFP_NOFS); 3754acce952bSliubo while (start <= end) { 3755acce952bSliubo index = start >> PAGE_CACHE_SHIFT; 3756acce952bSliubo start = (u64)(index + 1) << PAGE_CACHE_SHIFT; 3757acce952bSliubo page = find_get_page(btree_inode->i_mapping, index); 3758acce952bSliubo if (!page) 3759acce952bSliubo continue; 3760acce952bSliubo offset = page_offset(page); 3761acce952bSliubo 3762acce952bSliubo spin_lock(&dirty_pages->buffer_lock); 3763acce952bSliubo eb = radix_tree_lookup( 3764acce952bSliubo &(&BTRFS_I(page->mapping->host)->io_tree)->buffer, 3765acce952bSliubo offset >> PAGE_CACHE_SHIFT); 3766acce952bSliubo spin_unlock(&dirty_pages->buffer_lock); 3767ee670f0aSJosef Bacik if (eb) 3768acce952bSliubo ret = test_and_clear_bit(EXTENT_BUFFER_DIRTY, 3769acce952bSliubo &eb->bflags); 3770acce952bSliubo if (PageWriteback(page)) 3771acce952bSliubo end_page_writeback(page); 3772acce952bSliubo 3773acce952bSliubo lock_page(page); 3774acce952bSliubo if (PageDirty(page)) { 3775acce952bSliubo clear_page_dirty_for_io(page); 3776acce952bSliubo spin_lock_irq(&page->mapping->tree_lock); 3777acce952bSliubo radix_tree_tag_clear(&page->mapping->page_tree, 3778acce952bSliubo page_index(page), 3779acce952bSliubo PAGECACHE_TAG_DIRTY); 3780acce952bSliubo spin_unlock_irq(&page->mapping->tree_lock); 3781acce952bSliubo } 3782acce952bSliubo 3783acce952bSliubo unlock_page(page); 3784ee670f0aSJosef Bacik page_cache_release(page); 3785acce952bSliubo } 3786acce952bSliubo } 3787acce952bSliubo 3788acce952bSliubo return ret; 3789acce952bSliubo } 3790acce952bSliubo 3791acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 3792acce952bSliubo struct extent_io_tree *pinned_extents) 3793acce952bSliubo { 3794acce952bSliubo struct extent_io_tree *unpin; 3795acce952bSliubo u64 start; 3796acce952bSliubo u64 end; 3797acce952bSliubo int ret; 3798ed0eaa14SLiu Bo bool loop = true; 3799acce952bSliubo 3800acce952bSliubo unpin = pinned_extents; 3801ed0eaa14SLiu Bo again: 3802acce952bSliubo while (1) { 3803acce952bSliubo ret = find_first_extent_bit(unpin, 0, &start, &end, 3804e6138876SJosef Bacik EXTENT_DIRTY, NULL); 3805acce952bSliubo if (ret) 3806acce952bSliubo break; 3807acce952bSliubo 3808acce952bSliubo /* opt_discard */ 38095378e607SLi Dongyang if (btrfs_test_opt(root, DISCARD)) 38105378e607SLi Dongyang ret = btrfs_error_discard_extent(root, start, 38115378e607SLi Dongyang end + 1 - start, 38125378e607SLi Dongyang NULL); 3813acce952bSliubo 3814acce952bSliubo clear_extent_dirty(unpin, start, end, GFP_NOFS); 3815acce952bSliubo btrfs_error_unpin_extent_range(root, start, end); 3816acce952bSliubo cond_resched(); 3817acce952bSliubo } 3818acce952bSliubo 3819ed0eaa14SLiu Bo if (loop) { 3820ed0eaa14SLiu Bo if (unpin == &root->fs_info->freed_extents[0]) 3821ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[1]; 3822ed0eaa14SLiu Bo else 3823ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[0]; 3824ed0eaa14SLiu Bo loop = false; 3825ed0eaa14SLiu Bo goto again; 3826ed0eaa14SLiu Bo } 3827ed0eaa14SLiu Bo 3828acce952bSliubo return 0; 3829acce952bSliubo } 3830acce952bSliubo 383149b25e05SJeff Mahoney void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, 383249b25e05SJeff Mahoney struct btrfs_root *root) 383349b25e05SJeff Mahoney { 383449b25e05SJeff Mahoney btrfs_destroy_delayed_refs(cur_trans, root); 383549b25e05SJeff Mahoney btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv, 383649b25e05SJeff Mahoney cur_trans->dirty_pages.dirty_bytes); 383749b25e05SJeff Mahoney 383849b25e05SJeff Mahoney /* FIXME: cleanup wait for commit */ 383949b25e05SJeff Mahoney cur_trans->in_commit = 1; 384049b25e05SJeff Mahoney cur_trans->blocked = 1; 384149b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_blocked_wait); 384249b25e05SJeff Mahoney 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_pending_snapshots(cur_trans); 385349b25e05SJeff Mahoney 385449b25e05SJeff Mahoney btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, 385549b25e05SJeff Mahoney EXTENT_DIRTY); 38566e841e32SLiu Bo btrfs_destroy_pinned_extent(root, 38576e841e32SLiu Bo root->fs_info->pinned_extents); 385849b25e05SJeff Mahoney 385949b25e05SJeff Mahoney /* 386049b25e05SJeff Mahoney memset(cur_trans, 0, sizeof(*cur_trans)); 386149b25e05SJeff Mahoney kmem_cache_free(btrfs_transaction_cachep, cur_trans); 386249b25e05SJeff Mahoney */ 386349b25e05SJeff Mahoney } 386449b25e05SJeff Mahoney 386549b25e05SJeff Mahoney int btrfs_cleanup_transaction(struct btrfs_root *root) 3866acce952bSliubo { 3867acce952bSliubo struct btrfs_transaction *t; 3868acce952bSliubo LIST_HEAD(list); 3869acce952bSliubo 3870acce952bSliubo mutex_lock(&root->fs_info->transaction_kthread_mutex); 3871acce952bSliubo 3872a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3873acce952bSliubo list_splice_init(&root->fs_info->trans_list, &list); 3874a4abeea4SJosef Bacik root->fs_info->trans_no_join = 1; 3875a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3876a4abeea4SJosef Bacik 3877acce952bSliubo while (!list_empty(&list)) { 3878acce952bSliubo t = list_entry(list.next, struct btrfs_transaction, list); 3879acce952bSliubo 3880569e0f35SJosef Bacik btrfs_destroy_ordered_operations(t, root); 3881acce952bSliubo 3882acce952bSliubo btrfs_destroy_ordered_extents(root); 3883acce952bSliubo 3884acce952bSliubo btrfs_destroy_delayed_refs(t, root); 3885acce952bSliubo 3886acce952bSliubo btrfs_block_rsv_release(root, 3887acce952bSliubo &root->fs_info->trans_block_rsv, 3888acce952bSliubo t->dirty_pages.dirty_bytes); 3889acce952bSliubo 3890acce952bSliubo /* FIXME: cleanup wait for commit */ 3891acce952bSliubo t->in_commit = 1; 3892acce952bSliubo t->blocked = 1; 389366657b31SJosef Bacik smp_mb(); 3894acce952bSliubo if (waitqueue_active(&root->fs_info->transaction_blocked_wait)) 3895acce952bSliubo wake_up(&root->fs_info->transaction_blocked_wait); 3896acce952bSliubo 3897acce952bSliubo t->blocked = 0; 389866657b31SJosef Bacik smp_mb(); 3899acce952bSliubo if (waitqueue_active(&root->fs_info->transaction_wait)) 3900acce952bSliubo wake_up(&root->fs_info->transaction_wait); 3901acce952bSliubo 3902acce952bSliubo t->commit_done = 1; 390366657b31SJosef Bacik smp_mb(); 3904acce952bSliubo if (waitqueue_active(&t->commit_wait)) 3905acce952bSliubo wake_up(&t->commit_wait); 3906acce952bSliubo 390767cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 390867cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 390967cde344SMiao Xie 3910acce952bSliubo btrfs_destroy_pending_snapshots(t); 3911acce952bSliubo 3912acce952bSliubo btrfs_destroy_delalloc_inodes(root); 3913acce952bSliubo 3914a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3915acce952bSliubo root->fs_info->running_transaction = NULL; 3916a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3917acce952bSliubo 3918acce952bSliubo btrfs_destroy_marked_extents(root, &t->dirty_pages, 3919acce952bSliubo EXTENT_DIRTY); 3920acce952bSliubo 3921acce952bSliubo btrfs_destroy_pinned_extent(root, 3922acce952bSliubo root->fs_info->pinned_extents); 3923acce952bSliubo 392413c5a93eSJosef Bacik atomic_set(&t->use_count, 0); 3925acce952bSliubo list_del_init(&t->list); 3926acce952bSliubo memset(t, 0, sizeof(*t)); 3927acce952bSliubo kmem_cache_free(btrfs_transaction_cachep, t); 3928acce952bSliubo } 3929acce952bSliubo 3930a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3931a4abeea4SJosef Bacik root->fs_info->trans_no_join = 0; 3932a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3933acce952bSliubo mutex_unlock(&root->fs_info->transaction_kthread_mutex); 3934acce952bSliubo 3935acce952bSliubo return 0; 3936acce952bSliubo } 3937acce952bSliubo 3938d1310b2eSChris Mason static struct extent_io_ops btree_extent_io_ops = { 3939ce9adaa5SChris Mason .readpage_end_io_hook = btree_readpage_end_io_hook, 39404bb31e92SArne Jansen .readpage_io_failed_hook = btree_io_failed_hook, 39410b86a832SChris Mason .submit_bio_hook = btree_submit_bio_hook, 3942239b14b3SChris Mason /* note we're sharing with inode.c for the merge bio hook */ 3943239b14b3SChris Mason .merge_bio_hook = btrfs_merge_bio_hook, 39440da5468fSChris Mason }; 3945