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); 60143bede5SJeff Mahoney static void btrfs_destroy_ordered_operations(struct btrfs_root *root); 61143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root); 62acce952bSliubo static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 63acce952bSliubo struct btrfs_root *root); 64143bede5SJeff Mahoney static void btrfs_destroy_pending_snapshots(struct btrfs_transaction *t); 65143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); 66acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 67acce952bSliubo struct extent_io_tree *dirty_pages, 68acce952bSliubo int mark); 69acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 70acce952bSliubo struct extent_io_tree *pinned_extents); 71ce9adaa5SChris Mason 72d352ac68SChris Mason /* 73d352ac68SChris Mason * end_io_wq structs are used to do processing in task context when an IO is 74d352ac68SChris Mason * complete. This is used during reads to verify checksums, and it is used 75d352ac68SChris Mason * by writes to insert metadata for new file extents after IO is complete. 76d352ac68SChris Mason */ 77ce9adaa5SChris Mason struct end_io_wq { 78ce9adaa5SChris Mason struct bio *bio; 79ce9adaa5SChris Mason bio_end_io_t *end_io; 80ce9adaa5SChris Mason void *private; 81ce9adaa5SChris Mason struct btrfs_fs_info *info; 82ce9adaa5SChris Mason int error; 8322c59948SChris Mason int metadata; 84ce9adaa5SChris Mason struct list_head list; 858b712842SChris Mason struct btrfs_work work; 86ce9adaa5SChris Mason }; 870da5468fSChris Mason 88d352ac68SChris Mason /* 89d352ac68SChris Mason * async submit bios are used to offload expensive checksumming 90d352ac68SChris Mason * onto the worker threads. They checksum file and metadata bios 91d352ac68SChris Mason * just before they are sent down the IO stack. 92d352ac68SChris Mason */ 9344b8bd7eSChris Mason struct async_submit_bio { 9444b8bd7eSChris Mason struct inode *inode; 9544b8bd7eSChris Mason struct bio *bio; 9644b8bd7eSChris Mason struct list_head list; 974a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start; 984a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done; 9944b8bd7eSChris Mason int rw; 10044b8bd7eSChris Mason int mirror_num; 101c8b97818SChris Mason unsigned long bio_flags; 102eaf25d93SChris Mason /* 103eaf25d93SChris Mason * bio_offset is optional, can be used if the pages in the bio 104eaf25d93SChris Mason * can't tell us where in the file the bio should go 105eaf25d93SChris Mason */ 106eaf25d93SChris Mason u64 bio_offset; 1078b712842SChris Mason struct btrfs_work work; 10879787eaaSJeff Mahoney int error; 10944b8bd7eSChris Mason }; 11044b8bd7eSChris Mason 11185d4e461SChris Mason /* 11285d4e461SChris Mason * Lockdep class keys for extent_buffer->lock's in this root. For a given 11385d4e461SChris Mason * eb, the lockdep key is determined by the btrfs_root it belongs to and 11485d4e461SChris Mason * the level the eb occupies in the tree. 1154008c04aSChris Mason * 11685d4e461SChris Mason * Different roots are used for different purposes and may nest inside each 11785d4e461SChris Mason * other and they require separate keysets. As lockdep keys should be 11885d4e461SChris Mason * static, assign keysets according to the purpose of the root as indicated 11985d4e461SChris Mason * by btrfs_root->objectid. This ensures that all special purpose roots 12085d4e461SChris Mason * have separate keysets. 1214008c04aSChris Mason * 12285d4e461SChris Mason * Lock-nesting across peer nodes is always done with the immediate parent 12385d4e461SChris Mason * node locked thus preventing deadlock. As lockdep doesn't know this, use 12485d4e461SChris Mason * subclass to avoid triggering lockdep warning in such cases. 1254008c04aSChris Mason * 12685d4e461SChris Mason * The key is set by the readpage_end_io_hook after the buffer has passed 12785d4e461SChris Mason * csum validation but before the pages are unlocked. It is also set by 12885d4e461SChris Mason * btrfs_init_new_buffer on freshly allocated blocks. 12985d4e461SChris Mason * 13085d4e461SChris Mason * We also add a check to make sure the highest level of the tree is the 13185d4e461SChris Mason * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code 13285d4e461SChris Mason * needs update as well. 1334008c04aSChris Mason */ 1344008c04aSChris Mason #ifdef CONFIG_DEBUG_LOCK_ALLOC 1354008c04aSChris Mason # if BTRFS_MAX_LEVEL != 8 1364008c04aSChris Mason # error 1374008c04aSChris Mason # endif 13885d4e461SChris Mason 13985d4e461SChris Mason static struct btrfs_lockdep_keyset { 14085d4e461SChris Mason u64 id; /* root objectid */ 14185d4e461SChris Mason const char *name_stem; /* lock name stem */ 14285d4e461SChris Mason char names[BTRFS_MAX_LEVEL + 1][20]; 14385d4e461SChris Mason struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; 14485d4e461SChris Mason } btrfs_lockdep_keysets[] = { 14585d4e461SChris Mason { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, 14685d4e461SChris Mason { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, 14785d4e461SChris Mason { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, 14885d4e461SChris Mason { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, 14985d4e461SChris Mason { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, 15085d4e461SChris Mason { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, 15185d4e461SChris Mason { .id = BTRFS_ORPHAN_OBJECTID, .name_stem = "orphan" }, 15285d4e461SChris Mason { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, 15385d4e461SChris Mason { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, 15485d4e461SChris Mason { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, 15585d4e461SChris Mason { .id = 0, .name_stem = "tree" }, 1564008c04aSChris Mason }; 15785d4e461SChris Mason 15885d4e461SChris Mason void __init btrfs_init_lockdep(void) 15985d4e461SChris Mason { 16085d4e461SChris Mason int i, j; 16185d4e461SChris Mason 16285d4e461SChris Mason /* initialize lockdep class names */ 16385d4e461SChris Mason for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { 16485d4e461SChris Mason struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; 16585d4e461SChris Mason 16685d4e461SChris Mason for (j = 0; j < ARRAY_SIZE(ks->names); j++) 16785d4e461SChris Mason snprintf(ks->names[j], sizeof(ks->names[j]), 16885d4e461SChris Mason "btrfs-%s-%02d", ks->name_stem, j); 16985d4e461SChris Mason } 17085d4e461SChris Mason } 17185d4e461SChris Mason 17285d4e461SChris Mason void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, 17385d4e461SChris Mason int level) 17485d4e461SChris Mason { 17585d4e461SChris Mason struct btrfs_lockdep_keyset *ks; 17685d4e461SChris Mason 17785d4e461SChris Mason BUG_ON(level >= ARRAY_SIZE(ks->keys)); 17885d4e461SChris Mason 17985d4e461SChris Mason /* find the matching keyset, id 0 is the default entry */ 18085d4e461SChris Mason for (ks = btrfs_lockdep_keysets; ks->id; ks++) 18185d4e461SChris Mason if (ks->id == objectid) 18285d4e461SChris Mason break; 18385d4e461SChris Mason 18485d4e461SChris Mason lockdep_set_class_and_name(&eb->lock, 18585d4e461SChris Mason &ks->keys[level], ks->names[level]); 18685d4e461SChris Mason } 18785d4e461SChris Mason 1884008c04aSChris Mason #endif 1894008c04aSChris Mason 190d352ac68SChris Mason /* 191d352ac68SChris Mason * extents on the btree inode are pretty simple, there's one extent 192d352ac68SChris Mason * that covers the entire device 193d352ac68SChris Mason */ 194b2950863SChristoph Hellwig static struct extent_map *btree_get_extent(struct inode *inode, 195306e16ceSDavid Sterba struct page *page, size_t pg_offset, u64 start, u64 len, 1965f39d397SChris Mason int create) 1975f39d397SChris Mason { 1985f39d397SChris Mason struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; 1995f39d397SChris Mason struct extent_map *em; 2005f39d397SChris Mason int ret; 2015f39d397SChris Mason 202890871beSChris Mason read_lock(&em_tree->lock); 203d1310b2eSChris Mason em = lookup_extent_mapping(em_tree, start, len); 204a061fc8dSChris Mason if (em) { 205a061fc8dSChris Mason em->bdev = 206a061fc8dSChris Mason BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 207890871beSChris Mason read_unlock(&em_tree->lock); 2085f39d397SChris Mason goto out; 209a061fc8dSChris Mason } 210890871beSChris Mason read_unlock(&em_tree->lock); 2117b13b7b1SChris Mason 212172ddd60SDavid Sterba em = alloc_extent_map(); 2135f39d397SChris Mason if (!em) { 2145f39d397SChris Mason em = ERR_PTR(-ENOMEM); 2155f39d397SChris Mason goto out; 2165f39d397SChris Mason } 2175f39d397SChris Mason em->start = 0; 2180afbaf8cSChris Mason em->len = (u64)-1; 219c8b97818SChris Mason em->block_len = (u64)-1; 2205f39d397SChris Mason em->block_start = 0; 221a061fc8dSChris Mason em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 222d1310b2eSChris Mason 223890871beSChris Mason write_lock(&em_tree->lock); 2245f39d397SChris Mason ret = add_extent_mapping(em_tree, em); 2255f39d397SChris Mason if (ret == -EEXIST) { 2265f39d397SChris Mason free_extent_map(em); 2277b13b7b1SChris Mason em = lookup_extent_mapping(em_tree, start, len); 228b4f359abSTsutomu Itoh if (!em) 2290433f20dSTsutomu Itoh em = ERR_PTR(-EIO); 2305f39d397SChris Mason } else if (ret) { 2317b13b7b1SChris Mason free_extent_map(em); 2320433f20dSTsutomu Itoh em = ERR_PTR(ret); 2335f39d397SChris Mason } 234890871beSChris Mason write_unlock(&em_tree->lock); 2357b13b7b1SChris Mason 2365f39d397SChris Mason out: 2375f39d397SChris Mason return em; 2385f39d397SChris Mason } 2395f39d397SChris Mason 24019c00ddcSChris Mason u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len) 24119c00ddcSChris Mason { 242163e783eSDavid Woodhouse return crc32c(seed, data, len); 24319c00ddcSChris Mason } 24419c00ddcSChris Mason 24519c00ddcSChris Mason void btrfs_csum_final(u32 crc, char *result) 24619c00ddcSChris Mason { 2477e75bf3fSDavid Sterba put_unaligned_le32(~crc, result); 24819c00ddcSChris Mason } 24919c00ddcSChris Mason 250d352ac68SChris Mason /* 251d352ac68SChris Mason * compute the csum for a btree block, and either verify it or write it 252d352ac68SChris Mason * into the csum field of the block. 253d352ac68SChris Mason */ 25419c00ddcSChris Mason static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, 25519c00ddcSChris Mason int verify) 25619c00ddcSChris Mason { 2576c41761fSDavid Sterba u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy); 258607d432dSJosef Bacik char *result = NULL; 25919c00ddcSChris Mason unsigned long len; 26019c00ddcSChris Mason unsigned long cur_len; 26119c00ddcSChris Mason unsigned long offset = BTRFS_CSUM_SIZE; 26219c00ddcSChris Mason char *kaddr; 26319c00ddcSChris Mason unsigned long map_start; 26419c00ddcSChris Mason unsigned long map_len; 26519c00ddcSChris Mason int err; 26619c00ddcSChris Mason u32 crc = ~(u32)0; 267607d432dSJosef Bacik unsigned long inline_result; 26819c00ddcSChris Mason 26919c00ddcSChris Mason len = buf->len - offset; 27019c00ddcSChris Mason while (len > 0) { 27119c00ddcSChris Mason err = map_private_extent_buffer(buf, offset, 32, 272a6591715SChris Mason &kaddr, &map_start, &map_len); 273d397712bSChris Mason if (err) 27419c00ddcSChris Mason return 1; 27519c00ddcSChris Mason cur_len = min(len, map_len - (offset - map_start)); 27619c00ddcSChris Mason crc = btrfs_csum_data(root, kaddr + offset - map_start, 27719c00ddcSChris Mason crc, cur_len); 27819c00ddcSChris Mason len -= cur_len; 27919c00ddcSChris Mason offset += cur_len; 28019c00ddcSChris Mason } 281607d432dSJosef Bacik if (csum_size > sizeof(inline_result)) { 282607d432dSJosef Bacik result = kzalloc(csum_size * sizeof(char), GFP_NOFS); 283607d432dSJosef Bacik if (!result) 284607d432dSJosef Bacik return 1; 285607d432dSJosef Bacik } else { 286607d432dSJosef Bacik result = (char *)&inline_result; 287607d432dSJosef Bacik } 288607d432dSJosef Bacik 28919c00ddcSChris Mason btrfs_csum_final(crc, result); 29019c00ddcSChris Mason 29119c00ddcSChris Mason if (verify) { 292607d432dSJosef Bacik if (memcmp_extent_buffer(buf, result, 0, csum_size)) { 293e4204dedSChris Mason u32 val; 294e4204dedSChris Mason u32 found = 0; 295607d432dSJosef Bacik memcpy(&found, result, csum_size); 296e4204dedSChris Mason 297607d432dSJosef Bacik read_extent_buffer(buf, &val, 0, csum_size); 2987a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs: %s checksum verify " 299193f284dSChris Mason "failed on %llu wanted %X found %X " 300193f284dSChris Mason "level %d\n", 30119c00ddcSChris Mason root->fs_info->sb->s_id, 302193f284dSChris Mason (unsigned long long)buf->start, val, found, 303193f284dSChris Mason btrfs_header_level(buf)); 304607d432dSJosef Bacik if (result != (char *)&inline_result) 305607d432dSJosef Bacik kfree(result); 30619c00ddcSChris Mason return 1; 30719c00ddcSChris Mason } 30819c00ddcSChris Mason } else { 309607d432dSJosef Bacik write_extent_buffer(buf, result, 0, csum_size); 31019c00ddcSChris Mason } 311607d432dSJosef Bacik if (result != (char *)&inline_result) 312607d432dSJosef Bacik kfree(result); 31319c00ddcSChris Mason return 0; 31419c00ddcSChris Mason } 31519c00ddcSChris Mason 316d352ac68SChris Mason /* 317d352ac68SChris Mason * we can't consider a given block up to date unless the transid of the 318d352ac68SChris Mason * block matches the transid in the parent node's pointer. This is how we 319d352ac68SChris Mason * detect blocks that either didn't get written at all or got written 320d352ac68SChris Mason * in the wrong place. 321d352ac68SChris Mason */ 3221259ab75SChris Mason static int verify_parent_transid(struct extent_io_tree *io_tree, 323b9fab919SChris Mason struct extent_buffer *eb, u64 parent_transid, 324b9fab919SChris Mason int atomic) 3251259ab75SChris Mason { 3262ac55d41SJosef Bacik struct extent_state *cached_state = NULL; 3271259ab75SChris Mason int ret; 3281259ab75SChris Mason 3291259ab75SChris Mason if (!parent_transid || btrfs_header_generation(eb) == parent_transid) 3301259ab75SChris Mason return 0; 3311259ab75SChris Mason 332b9fab919SChris Mason if (atomic) 333b9fab919SChris Mason return -EAGAIN; 334b9fab919SChris Mason 3352ac55d41SJosef Bacik lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, 336d0082371SJeff Mahoney 0, &cached_state); 3370b32f4bbSJosef Bacik if (extent_buffer_uptodate(eb) && 3381259ab75SChris Mason btrfs_header_generation(eb) == parent_transid) { 3391259ab75SChris Mason ret = 0; 3401259ab75SChris Mason goto out; 3411259ab75SChris Mason } 3427a36ddecSDavid Sterba printk_ratelimited("parent transid verify failed on %llu wanted %llu " 343193f284dSChris Mason "found %llu\n", 3441259ab75SChris Mason (unsigned long long)eb->start, 3451259ab75SChris Mason (unsigned long long)parent_transid, 3461259ab75SChris Mason (unsigned long long)btrfs_header_generation(eb)); 3471259ab75SChris Mason ret = 1; 3480b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 34933958dc6SChris Mason out: 3502ac55d41SJosef Bacik unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, 3512ac55d41SJosef Bacik &cached_state, GFP_NOFS); 3521259ab75SChris Mason return ret; 3531259ab75SChris Mason } 3541259ab75SChris Mason 355d352ac68SChris Mason /* 356d352ac68SChris Mason * helper to read a given tree block, doing retries as required when 357d352ac68SChris Mason * the checksums don't match and we have alternate mirrors to try. 358d352ac68SChris Mason */ 359f188591eSChris Mason static int btree_read_extent_buffer_pages(struct btrfs_root *root, 360f188591eSChris Mason struct extent_buffer *eb, 361ca7a79adSChris Mason u64 start, u64 parent_transid) 362f188591eSChris Mason { 363f188591eSChris Mason struct extent_io_tree *io_tree; 364ea466794SJosef Bacik int failed = 0; 365f188591eSChris Mason int ret; 366f188591eSChris Mason int num_copies = 0; 367f188591eSChris Mason int mirror_num = 0; 368ea466794SJosef Bacik int failed_mirror = 0; 369f188591eSChris Mason 370a826d6dcSJosef Bacik clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 371f188591eSChris Mason io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; 372f188591eSChris Mason while (1) { 373bb82ab88SArne Jansen ret = read_extent_buffer_pages(io_tree, eb, start, 374bb82ab88SArne Jansen WAIT_COMPLETE, 375f188591eSChris Mason btree_get_extent, mirror_num); 376256dd1bbSStefan Behrens if (!ret) { 377256dd1bbSStefan Behrens if (!verify_parent_transid(io_tree, eb, 378b9fab919SChris Mason parent_transid, 0)) 379ea466794SJosef Bacik break; 380256dd1bbSStefan Behrens else 381256dd1bbSStefan Behrens ret = -EIO; 382256dd1bbSStefan Behrens } 383d397712bSChris Mason 384a826d6dcSJosef Bacik /* 385a826d6dcSJosef Bacik * This buffer's crc is fine, but its contents are corrupted, so 386a826d6dcSJosef Bacik * there is no reason to read the other copies, they won't be 387a826d6dcSJosef Bacik * any less wrong. 388a826d6dcSJosef Bacik */ 389a826d6dcSJosef Bacik if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) 390ea466794SJosef Bacik break; 391ea466794SJosef Bacik 3925d964051SStefan Behrens num_copies = btrfs_num_copies(root->fs_info, 393f188591eSChris Mason eb->start, eb->len); 3944235298eSChris Mason if (num_copies == 1) 395ea466794SJosef Bacik break; 3964235298eSChris Mason 3975cf1ab56SJosef Bacik if (!failed_mirror) { 3985cf1ab56SJosef Bacik failed = 1; 3995cf1ab56SJosef Bacik failed_mirror = eb->read_mirror; 4005cf1ab56SJosef Bacik } 4015cf1ab56SJosef Bacik 402f188591eSChris Mason mirror_num++; 403ea466794SJosef Bacik if (mirror_num == failed_mirror) 404ea466794SJosef Bacik mirror_num++; 405ea466794SJosef Bacik 4064235298eSChris Mason if (mirror_num > num_copies) 407ea466794SJosef Bacik break; 408f188591eSChris Mason } 409ea466794SJosef Bacik 410c0901581SStefan Behrens if (failed && !ret && failed_mirror) 411ea466794SJosef Bacik repair_eb_io_failure(root, eb, failed_mirror); 412ea466794SJosef Bacik 413ea466794SJosef Bacik return ret; 414f188591eSChris Mason } 41519c00ddcSChris Mason 416d352ac68SChris Mason /* 417d397712bSChris Mason * checksum a dirty tree block before IO. This has extra checks to make sure 418d397712bSChris Mason * we only fill in the checksum field in the first page of a multi-page block 419d352ac68SChris Mason */ 420d397712bSChris Mason 421b2950863SChristoph Hellwig static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) 42219c00ddcSChris Mason { 423d1310b2eSChris Mason struct extent_io_tree *tree; 42435ebb934SChris Mason u64 start = (u64)page->index << PAGE_CACHE_SHIFT; 42519c00ddcSChris Mason u64 found_start; 42619c00ddcSChris Mason struct extent_buffer *eb; 427f188591eSChris Mason 428d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 42919c00ddcSChris Mason 4304f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 4314f2de97aSJosef Bacik if (page != eb->pages[0]) 4324f2de97aSJosef Bacik return 0; 43319c00ddcSChris Mason found_start = btrfs_header_bytenr(eb); 43419c00ddcSChris Mason if (found_start != start) { 43555c69072SChris Mason WARN_ON(1); 4364f2de97aSJosef Bacik return 0; 43755c69072SChris Mason } 43855c69072SChris Mason if (!PageUptodate(page)) { 43955c69072SChris Mason WARN_ON(1); 4404f2de97aSJosef Bacik return 0; 44119c00ddcSChris Mason } 44219c00ddcSChris Mason csum_tree_block(root, eb, 0); 44319c00ddcSChris Mason return 0; 44419c00ddcSChris Mason } 44519c00ddcSChris Mason 4462b82032cSYan Zheng static int check_tree_block_fsid(struct btrfs_root *root, 4472b82032cSYan Zheng struct extent_buffer *eb) 4482b82032cSYan Zheng { 4492b82032cSYan Zheng struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; 4502b82032cSYan Zheng u8 fsid[BTRFS_UUID_SIZE]; 4512b82032cSYan Zheng int ret = 1; 4522b82032cSYan Zheng 4532b82032cSYan Zheng read_extent_buffer(eb, fsid, (unsigned long)btrfs_header_fsid(eb), 4542b82032cSYan Zheng BTRFS_FSID_SIZE); 4552b82032cSYan Zheng while (fs_devices) { 4562b82032cSYan Zheng if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { 4572b82032cSYan Zheng ret = 0; 4582b82032cSYan Zheng break; 4592b82032cSYan Zheng } 4602b82032cSYan Zheng fs_devices = fs_devices->seed; 4612b82032cSYan Zheng } 4622b82032cSYan Zheng return ret; 4632b82032cSYan Zheng } 4642b82032cSYan Zheng 465a826d6dcSJosef Bacik #define CORRUPT(reason, eb, root, slot) \ 466a826d6dcSJosef Bacik printk(KERN_CRIT "btrfs: corrupt leaf, %s: block=%llu," \ 467a826d6dcSJosef Bacik "root=%llu, slot=%d\n", reason, \ 468a826d6dcSJosef Bacik (unsigned long long)btrfs_header_bytenr(eb), \ 469a826d6dcSJosef Bacik (unsigned long long)root->objectid, slot) 470a826d6dcSJosef Bacik 471a826d6dcSJosef Bacik static noinline int check_leaf(struct btrfs_root *root, 472a826d6dcSJosef Bacik struct extent_buffer *leaf) 473a826d6dcSJosef Bacik { 474a826d6dcSJosef Bacik struct btrfs_key key; 475a826d6dcSJosef Bacik struct btrfs_key leaf_key; 476a826d6dcSJosef Bacik u32 nritems = btrfs_header_nritems(leaf); 477a826d6dcSJosef Bacik int slot; 478a826d6dcSJosef Bacik 479a826d6dcSJosef Bacik if (nritems == 0) 480a826d6dcSJosef Bacik return 0; 481a826d6dcSJosef Bacik 482a826d6dcSJosef Bacik /* Check the 0 item */ 483a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != 484a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 485a826d6dcSJosef Bacik CORRUPT("invalid item offset size pair", leaf, root, 0); 486a826d6dcSJosef Bacik return -EIO; 487a826d6dcSJosef Bacik } 488a826d6dcSJosef Bacik 489a826d6dcSJosef Bacik /* 490a826d6dcSJosef Bacik * Check to make sure each items keys are in the correct order and their 491a826d6dcSJosef Bacik * offsets make sense. We only have to loop through nritems-1 because 492a826d6dcSJosef Bacik * we check the current slot against the next slot, which verifies the 493a826d6dcSJosef Bacik * next slot's offset+size makes sense and that the current's slot 494a826d6dcSJosef Bacik * offset is correct. 495a826d6dcSJosef Bacik */ 496a826d6dcSJosef Bacik for (slot = 0; slot < nritems - 1; slot++) { 497a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &leaf_key, slot); 498a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &key, slot + 1); 499a826d6dcSJosef Bacik 500a826d6dcSJosef Bacik /* Make sure the keys are in the right order */ 501a826d6dcSJosef Bacik if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { 502a826d6dcSJosef Bacik CORRUPT("bad key order", leaf, root, slot); 503a826d6dcSJosef Bacik return -EIO; 504a826d6dcSJosef Bacik } 505a826d6dcSJosef Bacik 506a826d6dcSJosef Bacik /* 507a826d6dcSJosef Bacik * Make sure the offset and ends are right, remember that the 508a826d6dcSJosef Bacik * item data starts at the end of the leaf and grows towards the 509a826d6dcSJosef Bacik * front. 510a826d6dcSJosef Bacik */ 511a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, slot) != 512a826d6dcSJosef Bacik btrfs_item_end_nr(leaf, slot + 1)) { 513a826d6dcSJosef Bacik CORRUPT("slot offset bad", leaf, root, slot); 514a826d6dcSJosef Bacik return -EIO; 515a826d6dcSJosef Bacik } 516a826d6dcSJosef Bacik 517a826d6dcSJosef Bacik /* 518a826d6dcSJosef Bacik * Check to make sure that we don't point outside of the leaf, 519a826d6dcSJosef Bacik * just incase all the items are consistent to eachother, but 520a826d6dcSJosef Bacik * all point outside of the leaf. 521a826d6dcSJosef Bacik */ 522a826d6dcSJosef Bacik if (btrfs_item_end_nr(leaf, slot) > 523a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 524a826d6dcSJosef Bacik CORRUPT("slot end outside of leaf", leaf, root, slot); 525a826d6dcSJosef Bacik return -EIO; 526a826d6dcSJosef Bacik } 527a826d6dcSJosef Bacik } 528a826d6dcSJosef Bacik 529a826d6dcSJosef Bacik return 0; 530a826d6dcSJosef Bacik } 531a826d6dcSJosef Bacik 532727011e0SChris Mason struct extent_buffer *find_eb_for_page(struct extent_io_tree *tree, 533727011e0SChris Mason struct page *page, int max_walk) 534727011e0SChris Mason { 535727011e0SChris Mason struct extent_buffer *eb; 536727011e0SChris Mason u64 start = page_offset(page); 537727011e0SChris Mason u64 target = start; 538727011e0SChris Mason u64 min_start; 539727011e0SChris Mason 540727011e0SChris Mason if (start < max_walk) 541727011e0SChris Mason min_start = 0; 542727011e0SChris Mason else 543727011e0SChris Mason min_start = start - max_walk; 544727011e0SChris Mason 545727011e0SChris Mason while (start >= min_start) { 546727011e0SChris Mason eb = find_extent_buffer(tree, start, 0); 547727011e0SChris Mason if (eb) { 548727011e0SChris Mason /* 549727011e0SChris Mason * we found an extent buffer and it contains our page 550727011e0SChris Mason * horray! 551727011e0SChris Mason */ 552727011e0SChris Mason if (eb->start <= target && 553727011e0SChris Mason eb->start + eb->len > target) 554727011e0SChris Mason return eb; 555727011e0SChris Mason 556727011e0SChris Mason /* we found an extent buffer that wasn't for us */ 557727011e0SChris Mason free_extent_buffer(eb); 558727011e0SChris Mason return NULL; 559727011e0SChris Mason } 560727011e0SChris Mason if (start == 0) 561727011e0SChris Mason break; 562727011e0SChris Mason start -= PAGE_CACHE_SIZE; 563727011e0SChris Mason } 564727011e0SChris Mason return NULL; 565727011e0SChris Mason } 566727011e0SChris Mason 567b2950863SChristoph Hellwig static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end, 5685cf1ab56SJosef Bacik struct extent_state *state, int mirror) 569ce9adaa5SChris Mason { 570ce9adaa5SChris Mason struct extent_io_tree *tree; 571ce9adaa5SChris Mason u64 found_start; 572ce9adaa5SChris Mason int found_level; 573ce9adaa5SChris Mason struct extent_buffer *eb; 574ce9adaa5SChris Mason struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 575f188591eSChris Mason int ret = 0; 576727011e0SChris Mason int reads_done; 577ce9adaa5SChris Mason 578ce9adaa5SChris Mason if (!page->private) 579ce9adaa5SChris Mason goto out; 580d397712bSChris Mason 581727011e0SChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 5824f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 583d397712bSChris Mason 5840b32f4bbSJosef Bacik /* the pending IO might have been the only thing that kept this buffer 5850b32f4bbSJosef Bacik * in memory. Make sure we have a ref for all this other checks 5860b32f4bbSJosef Bacik */ 5870b32f4bbSJosef Bacik extent_buffer_get(eb); 5880b32f4bbSJosef Bacik 5890b32f4bbSJosef Bacik reads_done = atomic_dec_and_test(&eb->io_pages); 590727011e0SChris Mason if (!reads_done) 591727011e0SChris Mason goto err; 592f188591eSChris Mason 5935cf1ab56SJosef Bacik eb->read_mirror = mirror; 594ea466794SJosef Bacik if (test_bit(EXTENT_BUFFER_IOERR, &eb->bflags)) { 595ea466794SJosef Bacik ret = -EIO; 596ea466794SJosef Bacik goto err; 597ea466794SJosef Bacik } 598ea466794SJosef Bacik 599ce9adaa5SChris Mason found_start = btrfs_header_bytenr(eb); 600727011e0SChris Mason if (found_start != eb->start) { 6017a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs bad tree block start " 602193f284dSChris Mason "%llu %llu\n", 603a1b32a59SChris Mason (unsigned long long)found_start, 604a1b32a59SChris Mason (unsigned long long)eb->start); 605f188591eSChris Mason ret = -EIO; 606ce9adaa5SChris Mason goto err; 607ce9adaa5SChris Mason } 6082b82032cSYan Zheng if (check_tree_block_fsid(root, eb)) { 6097a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs bad fsid on block %llu\n", 610d397712bSChris Mason (unsigned long long)eb->start); 6111259ab75SChris Mason ret = -EIO; 6121259ab75SChris Mason goto err; 6131259ab75SChris Mason } 614ce9adaa5SChris Mason found_level = btrfs_header_level(eb); 615ce9adaa5SChris Mason 61685d4e461SChris Mason btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), 61785d4e461SChris Mason eb, found_level); 6184008c04aSChris Mason 619ce9adaa5SChris Mason ret = csum_tree_block(root, eb, 1); 620a826d6dcSJosef Bacik if (ret) { 621f188591eSChris Mason ret = -EIO; 622a826d6dcSJosef Bacik goto err; 623a826d6dcSJosef Bacik } 624a826d6dcSJosef Bacik 625a826d6dcSJosef Bacik /* 626a826d6dcSJosef Bacik * If this is a leaf block and it is corrupt, set the corrupt bit so 627a826d6dcSJosef Bacik * that we don't try and read the other copies of this block, just 628a826d6dcSJosef Bacik * return -EIO. 629a826d6dcSJosef Bacik */ 630a826d6dcSJosef Bacik if (found_level == 0 && check_leaf(root, eb)) { 631a826d6dcSJosef Bacik set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 632a826d6dcSJosef Bacik ret = -EIO; 633a826d6dcSJosef Bacik } 634ce9adaa5SChris Mason 6350b32f4bbSJosef Bacik if (!ret) 6360b32f4bbSJosef Bacik set_extent_buffer_uptodate(eb); 637ce9adaa5SChris Mason err: 6384bb31e92SArne Jansen if (test_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) { 6394bb31e92SArne Jansen clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags); 6404bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, ret); 6414bb31e92SArne Jansen } 6424bb31e92SArne Jansen 64353b381b3SDavid Woodhouse if (ret) { 64453b381b3SDavid Woodhouse /* 64553b381b3SDavid Woodhouse * our io error hook is going to dec the io pages 64653b381b3SDavid Woodhouse * again, we have to make sure it has something 64753b381b3SDavid Woodhouse * to decrement 64853b381b3SDavid Woodhouse */ 64953b381b3SDavid Woodhouse atomic_inc(&eb->io_pages); 6500b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 65153b381b3SDavid Woodhouse } 6520b32f4bbSJosef Bacik free_extent_buffer(eb); 653ce9adaa5SChris Mason out: 654f188591eSChris Mason return ret; 655ce9adaa5SChris Mason } 656ce9adaa5SChris Mason 657ea466794SJosef Bacik static int btree_io_failed_hook(struct page *page, int failed_mirror) 6584bb31e92SArne Jansen { 6594bb31e92SArne Jansen struct extent_buffer *eb; 6604bb31e92SArne Jansen struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 6614bb31e92SArne Jansen 6624f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 663ea466794SJosef Bacik set_bit(EXTENT_BUFFER_IOERR, &eb->bflags); 6645cf1ab56SJosef Bacik eb->read_mirror = failed_mirror; 66553b381b3SDavid Woodhouse atomic_dec(&eb->io_pages); 666ea466794SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 6674bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, -EIO); 6684bb31e92SArne Jansen return -EIO; /* we fixed nothing */ 6694bb31e92SArne Jansen } 6704bb31e92SArne Jansen 671ce9adaa5SChris Mason static void end_workqueue_bio(struct bio *bio, int err) 672ce9adaa5SChris Mason { 673ce9adaa5SChris Mason struct end_io_wq *end_io_wq = bio->bi_private; 674ce9adaa5SChris Mason struct btrfs_fs_info *fs_info; 675ce9adaa5SChris Mason 676ce9adaa5SChris Mason fs_info = end_io_wq->info; 677ce9adaa5SChris Mason end_io_wq->error = err; 6788b712842SChris Mason end_io_wq->work.func = end_workqueue_fn; 6798b712842SChris Mason end_io_wq->work.flags = 0; 680d20f7043SChris Mason 6817b6d91daSChristoph Hellwig if (bio->bi_rw & REQ_WRITE) { 68253b381b3SDavid Woodhouse if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) 683cad321adSChris Mason btrfs_queue_worker(&fs_info->endio_meta_write_workers, 684cad321adSChris Mason &end_io_wq->work); 68553b381b3SDavid Woodhouse else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) 6860cb59c99SJosef Bacik btrfs_queue_worker(&fs_info->endio_freespace_worker, 6870cb59c99SJosef Bacik &end_io_wq->work); 68853b381b3SDavid Woodhouse else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 68953b381b3SDavid Woodhouse btrfs_queue_worker(&fs_info->endio_raid56_workers, 69053b381b3SDavid Woodhouse &end_io_wq->work); 691cad321adSChris Mason else 692e6dcd2dcSChris Mason btrfs_queue_worker(&fs_info->endio_write_workers, 693e6dcd2dcSChris Mason &end_io_wq->work); 694d20f7043SChris Mason } else { 69553b381b3SDavid Woodhouse if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 69653b381b3SDavid Woodhouse btrfs_queue_worker(&fs_info->endio_raid56_workers, 69753b381b3SDavid Woodhouse &end_io_wq->work); 69853b381b3SDavid Woodhouse else if (end_io_wq->metadata) 699d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_meta_workers, 700d20f7043SChris Mason &end_io_wq->work); 701e6dcd2dcSChris Mason else 702d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_workers, 703d20f7043SChris Mason &end_io_wq->work); 704d20f7043SChris Mason } 705ce9adaa5SChris Mason } 706ce9adaa5SChris Mason 7070cb59c99SJosef Bacik /* 7080cb59c99SJosef Bacik * For the metadata arg you want 7090cb59c99SJosef Bacik * 7100cb59c99SJosef Bacik * 0 - if data 7110cb59c99SJosef Bacik * 1 - if normal metadta 7120cb59c99SJosef Bacik * 2 - if writing to the free space cache area 71353b381b3SDavid Woodhouse * 3 - raid parity work 7140cb59c99SJosef Bacik */ 71522c59948SChris Mason int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, 71622c59948SChris Mason int metadata) 7170b86a832SChris Mason { 718ce9adaa5SChris Mason struct end_io_wq *end_io_wq; 719ce9adaa5SChris Mason end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); 720ce9adaa5SChris Mason if (!end_io_wq) 721ce9adaa5SChris Mason return -ENOMEM; 722ce9adaa5SChris Mason 723ce9adaa5SChris Mason end_io_wq->private = bio->bi_private; 724ce9adaa5SChris Mason end_io_wq->end_io = bio->bi_end_io; 72522c59948SChris Mason end_io_wq->info = info; 726ce9adaa5SChris Mason end_io_wq->error = 0; 727ce9adaa5SChris Mason end_io_wq->bio = bio; 72822c59948SChris Mason end_io_wq->metadata = metadata; 729ce9adaa5SChris Mason 730ce9adaa5SChris Mason bio->bi_private = end_io_wq; 731ce9adaa5SChris Mason bio->bi_end_io = end_workqueue_bio; 73222c59948SChris Mason return 0; 73322c59948SChris Mason } 73422c59948SChris Mason 735b64a2851SChris Mason unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) 7364854ddd0SChris Mason { 7374854ddd0SChris Mason unsigned long limit = min_t(unsigned long, 7384854ddd0SChris Mason info->workers.max_workers, 7394854ddd0SChris Mason info->fs_devices->open_devices); 7404854ddd0SChris Mason return 256 * limit; 7414854ddd0SChris Mason } 7424854ddd0SChris Mason 7434a69a410SChris Mason static void run_one_async_start(struct btrfs_work *work) 7444a69a410SChris Mason { 7454a69a410SChris Mason struct async_submit_bio *async; 74679787eaaSJeff Mahoney int ret; 7474a69a410SChris Mason 7484a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 74979787eaaSJeff Mahoney ret = async->submit_bio_start(async->inode, async->rw, async->bio, 750eaf25d93SChris Mason async->mirror_num, async->bio_flags, 751eaf25d93SChris Mason async->bio_offset); 75279787eaaSJeff Mahoney if (ret) 75379787eaaSJeff Mahoney async->error = ret; 7544a69a410SChris Mason } 7554a69a410SChris Mason 7564a69a410SChris Mason static void run_one_async_done(struct btrfs_work *work) 7578b712842SChris Mason { 7588b712842SChris Mason struct btrfs_fs_info *fs_info; 7598b712842SChris Mason struct async_submit_bio *async; 7604854ddd0SChris Mason int limit; 7618b712842SChris Mason 7628b712842SChris Mason async = container_of(work, struct async_submit_bio, work); 7638b712842SChris Mason fs_info = BTRFS_I(async->inode)->root->fs_info; 7644854ddd0SChris Mason 765b64a2851SChris Mason limit = btrfs_async_submit_limit(fs_info); 7664854ddd0SChris Mason limit = limit * 2 / 3; 7674854ddd0SChris Mason 76866657b31SJosef Bacik if (atomic_dec_return(&fs_info->nr_async_submits) < limit && 769b64a2851SChris Mason waitqueue_active(&fs_info->async_submit_wait)) 7704854ddd0SChris Mason wake_up(&fs_info->async_submit_wait); 7714854ddd0SChris Mason 77279787eaaSJeff Mahoney /* If an error occured we just want to clean up the bio and move on */ 77379787eaaSJeff Mahoney if (async->error) { 77479787eaaSJeff Mahoney bio_endio(async->bio, async->error); 77579787eaaSJeff Mahoney return; 77679787eaaSJeff Mahoney } 77779787eaaSJeff Mahoney 7784a69a410SChris Mason async->submit_bio_done(async->inode, async->rw, async->bio, 779eaf25d93SChris Mason async->mirror_num, async->bio_flags, 780eaf25d93SChris Mason async->bio_offset); 7814a69a410SChris Mason } 7824a69a410SChris Mason 7834a69a410SChris Mason static void run_one_async_free(struct btrfs_work *work) 7844a69a410SChris Mason { 7854a69a410SChris Mason struct async_submit_bio *async; 7864a69a410SChris Mason 7874a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 7888b712842SChris Mason kfree(async); 7898b712842SChris Mason } 7908b712842SChris Mason 79144b8bd7eSChris Mason int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, 79244b8bd7eSChris Mason int rw, struct bio *bio, int mirror_num, 793c8b97818SChris Mason unsigned long bio_flags, 794eaf25d93SChris Mason u64 bio_offset, 7954a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start, 7964a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done) 79744b8bd7eSChris Mason { 79844b8bd7eSChris Mason struct async_submit_bio *async; 79944b8bd7eSChris Mason 80044b8bd7eSChris Mason async = kmalloc(sizeof(*async), GFP_NOFS); 80144b8bd7eSChris Mason if (!async) 80244b8bd7eSChris Mason return -ENOMEM; 80344b8bd7eSChris Mason 80444b8bd7eSChris Mason async->inode = inode; 80544b8bd7eSChris Mason async->rw = rw; 80644b8bd7eSChris Mason async->bio = bio; 80744b8bd7eSChris Mason async->mirror_num = mirror_num; 8084a69a410SChris Mason async->submit_bio_start = submit_bio_start; 8094a69a410SChris Mason async->submit_bio_done = submit_bio_done; 8104a69a410SChris Mason 8114a69a410SChris Mason async->work.func = run_one_async_start; 8124a69a410SChris Mason async->work.ordered_func = run_one_async_done; 8134a69a410SChris Mason async->work.ordered_free = run_one_async_free; 8144a69a410SChris Mason 8158b712842SChris Mason async->work.flags = 0; 816c8b97818SChris Mason async->bio_flags = bio_flags; 817eaf25d93SChris Mason async->bio_offset = bio_offset; 8188c8bee1dSChris Mason 81979787eaaSJeff Mahoney async->error = 0; 82079787eaaSJeff Mahoney 821cb03c743SChris Mason atomic_inc(&fs_info->nr_async_submits); 822d313d7a3SChris Mason 8237b6d91daSChristoph Hellwig if (rw & REQ_SYNC) 824d313d7a3SChris Mason btrfs_set_work_high_prio(&async->work); 825d313d7a3SChris Mason 8268b712842SChris Mason btrfs_queue_worker(&fs_info->workers, &async->work); 8279473f16cSChris Mason 828771ed689SChris Mason while (atomic_read(&fs_info->async_submit_draining) && 829771ed689SChris Mason atomic_read(&fs_info->nr_async_submits)) { 830771ed689SChris Mason wait_event(fs_info->async_submit_wait, 831771ed689SChris Mason (atomic_read(&fs_info->nr_async_submits) == 0)); 832771ed689SChris Mason } 833771ed689SChris Mason 83444b8bd7eSChris Mason return 0; 83544b8bd7eSChris Mason } 83644b8bd7eSChris Mason 837ce3ed71aSChris Mason static int btree_csum_one_bio(struct bio *bio) 838ce3ed71aSChris Mason { 839ce3ed71aSChris Mason struct bio_vec *bvec = bio->bi_io_vec; 840ce3ed71aSChris Mason int bio_index = 0; 841ce3ed71aSChris Mason struct btrfs_root *root; 84279787eaaSJeff Mahoney int ret = 0; 843ce3ed71aSChris Mason 844ce3ed71aSChris Mason WARN_ON(bio->bi_vcnt <= 0); 845ce3ed71aSChris Mason while (bio_index < bio->bi_vcnt) { 846ce3ed71aSChris Mason root = BTRFS_I(bvec->bv_page->mapping->host)->root; 84779787eaaSJeff Mahoney ret = csum_dirty_buffer(root, bvec->bv_page); 84879787eaaSJeff Mahoney if (ret) 84979787eaaSJeff Mahoney break; 850ce3ed71aSChris Mason bio_index++; 851ce3ed71aSChris Mason bvec++; 852ce3ed71aSChris Mason } 85379787eaaSJeff Mahoney return ret; 854ce3ed71aSChris Mason } 855ce3ed71aSChris Mason 8564a69a410SChris Mason static int __btree_submit_bio_start(struct inode *inode, int rw, 8574a69a410SChris Mason struct bio *bio, int mirror_num, 858eaf25d93SChris Mason unsigned long bio_flags, 859eaf25d93SChris Mason u64 bio_offset) 86022c59948SChris Mason { 8618b712842SChris Mason /* 8628b712842SChris Mason * when we're called for a write, we're already in the async 8635443be45SChris Mason * submission context. Just jump into btrfs_map_bio 8648b712842SChris Mason */ 86579787eaaSJeff Mahoney return btree_csum_one_bio(bio); 86622c59948SChris Mason } 86722c59948SChris Mason 8684a69a410SChris Mason static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, 869eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 870eaf25d93SChris Mason u64 bio_offset) 8714a69a410SChris Mason { 87261891923SStefan Behrens int ret; 87361891923SStefan Behrens 8748b712842SChris Mason /* 8754a69a410SChris Mason * when we're called for a write, we're already in the async 8764a69a410SChris Mason * submission context. Just jump into btrfs_map_bio 8778b712842SChris Mason */ 87861891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); 87961891923SStefan Behrens if (ret) 88061891923SStefan Behrens bio_endio(bio, ret); 88161891923SStefan Behrens return ret; 8820b86a832SChris Mason } 8830b86a832SChris Mason 884de0022b9SJosef Bacik static int check_async_write(struct inode *inode, unsigned long bio_flags) 885de0022b9SJosef Bacik { 886de0022b9SJosef Bacik if (bio_flags & EXTENT_BIO_TREE_LOG) 887de0022b9SJosef Bacik return 0; 888de0022b9SJosef Bacik #ifdef CONFIG_X86 889de0022b9SJosef Bacik if (cpu_has_xmm4_2) 890de0022b9SJosef Bacik return 0; 891de0022b9SJosef Bacik #endif 892de0022b9SJosef Bacik return 1; 893de0022b9SJosef Bacik } 894de0022b9SJosef Bacik 89544b8bd7eSChris Mason static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, 896eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 897eaf25d93SChris Mason u64 bio_offset) 89844b8bd7eSChris Mason { 899de0022b9SJosef Bacik int async = check_async_write(inode, bio_flags); 9004a69a410SChris Mason int ret; 901cad321adSChris Mason 9027b6d91daSChristoph Hellwig if (!(rw & REQ_WRITE)) { 903cad321adSChris Mason /* 904cad321adSChris Mason * called for a read, do the setup so that checksum validation 905cad321adSChris Mason * can happen in the async kernel threads 906cad321adSChris Mason */ 907f3f266abSChris Mason ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, 908f3f266abSChris Mason bio, 1); 9091d4284bdSChris Mason if (ret) 91061891923SStefan Behrens goto out_w_error; 91161891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 9126f3577bdSChris Mason mirror_num, 0); 913de0022b9SJosef Bacik } else if (!async) { 914de0022b9SJosef Bacik ret = btree_csum_one_bio(bio); 915de0022b9SJosef Bacik if (ret) 91661891923SStefan Behrens goto out_w_error; 91761891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 918de0022b9SJosef Bacik mirror_num, 0); 91961891923SStefan Behrens } else { 920cad321adSChris Mason /* 92161891923SStefan Behrens * kthread helpers are used to submit writes so that 92261891923SStefan Behrens * checksumming can happen in parallel across all CPUs 923cad321adSChris Mason */ 92461891923SStefan Behrens ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, 925c8b97818SChris Mason inode, rw, bio, mirror_num, 0, 926eaf25d93SChris Mason bio_offset, 9274a69a410SChris Mason __btree_submit_bio_start, 9284a69a410SChris Mason __btree_submit_bio_done); 92944b8bd7eSChris Mason } 93044b8bd7eSChris Mason 93161891923SStefan Behrens if (ret) { 93261891923SStefan Behrens out_w_error: 93361891923SStefan Behrens bio_endio(bio, ret); 93461891923SStefan Behrens } 93561891923SStefan Behrens return ret; 93661891923SStefan Behrens } 93761891923SStefan Behrens 9383dd1462eSJan Beulich #ifdef CONFIG_MIGRATION 939784b4e29SChris Mason static int btree_migratepage(struct address_space *mapping, 940a6bc32b8SMel Gorman struct page *newpage, struct page *page, 941a6bc32b8SMel Gorman enum migrate_mode mode) 942784b4e29SChris Mason { 943784b4e29SChris Mason /* 944784b4e29SChris Mason * we can't safely write a btree page from here, 945784b4e29SChris Mason * we haven't done the locking hook 946784b4e29SChris Mason */ 947784b4e29SChris Mason if (PageDirty(page)) 948784b4e29SChris Mason return -EAGAIN; 949784b4e29SChris Mason /* 950784b4e29SChris Mason * Buffers may be managed in a filesystem specific way. 951784b4e29SChris Mason * We must have no buffers or drop them. 952784b4e29SChris Mason */ 953784b4e29SChris Mason if (page_has_private(page) && 954784b4e29SChris Mason !try_to_release_page(page, GFP_KERNEL)) 955784b4e29SChris Mason return -EAGAIN; 956a6bc32b8SMel Gorman return migrate_page(mapping, newpage, page, mode); 957784b4e29SChris Mason } 9583dd1462eSJan Beulich #endif 959784b4e29SChris Mason 9600da5468fSChris Mason 9610da5468fSChris Mason static int btree_writepages(struct address_space *mapping, 9620da5468fSChris Mason struct writeback_control *wbc) 9630da5468fSChris Mason { 964d1310b2eSChris Mason struct extent_io_tree *tree; 965d1310b2eSChris Mason tree = &BTRFS_I(mapping->host)->io_tree; 966d8d5f3e1SChris Mason if (wbc->sync_mode == WB_SYNC_NONE) { 967b9473439SChris Mason struct btrfs_root *root = BTRFS_I(mapping->host)->root; 968793955bcSChris Mason u64 num_dirty; 96924ab9cd8SChris Mason unsigned long thresh = 32 * 1024 * 1024; 970448d640bSChris Mason 971448d640bSChris Mason if (wbc->for_kupdate) 972448d640bSChris Mason return 0; 973448d640bSChris Mason 974b9473439SChris Mason /* this is a bit racy, but that's ok */ 975b9473439SChris Mason num_dirty = root->fs_info->dirty_metadata_bytes; 976d397712bSChris Mason if (num_dirty < thresh) 977793955bcSChris Mason return 0; 978793955bcSChris Mason } 9790b32f4bbSJosef Bacik return btree_write_cache_pages(mapping, wbc); 9800da5468fSChris Mason } 9810da5468fSChris Mason 982b2950863SChristoph Hellwig static int btree_readpage(struct file *file, struct page *page) 9835f39d397SChris Mason { 984d1310b2eSChris Mason struct extent_io_tree *tree; 985d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 9868ddc7d9cSJan Schmidt return extent_read_full_page(tree, page, btree_get_extent, 0); 9875f39d397SChris Mason } 9885f39d397SChris Mason 98970dec807SChris Mason static int btree_releasepage(struct page *page, gfp_t gfp_flags) 9905f39d397SChris Mason { 99198509cfcSChris Mason if (PageWriteback(page) || PageDirty(page)) 99298509cfcSChris Mason return 0; 9930c4e538bSDavid Sterba /* 9940c4e538bSDavid Sterba * We need to mask out eg. __GFP_HIGHMEM and __GFP_DMA32 as we're doing 9950c4e538bSDavid Sterba * slab allocation from alloc_extent_state down the callchain where 9960c4e538bSDavid Sterba * it'd hit a BUG_ON as those flags are not allowed. 9970c4e538bSDavid Sterba */ 9980c4e538bSDavid Sterba gfp_flags &= ~GFP_SLAB_BUG_MASK; 9990c4e538bSDavid Sterba 10003083ee2eSJosef Bacik return try_release_extent_buffer(page, gfp_flags); 1001d98237b3SChris Mason } 1002d98237b3SChris Mason 10035f39d397SChris Mason static void btree_invalidatepage(struct page *page, unsigned long offset) 1004d98237b3SChris Mason { 1005d1310b2eSChris Mason struct extent_io_tree *tree; 1006d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 10075f39d397SChris Mason extent_invalidatepage(tree, page, offset); 10085f39d397SChris Mason btree_releasepage(page, GFP_NOFS); 10099ad6b7bcSChris Mason if (PagePrivate(page)) { 1010d397712bSChris Mason printk(KERN_WARNING "btrfs warning page private not zero " 1011d397712bSChris Mason "on page %llu\n", (unsigned long long)page_offset(page)); 10129ad6b7bcSChris Mason ClearPagePrivate(page); 10139ad6b7bcSChris Mason set_page_private(page, 0); 10149ad6b7bcSChris Mason page_cache_release(page); 10159ad6b7bcSChris Mason } 1016d98237b3SChris Mason } 1017d98237b3SChris Mason 10180b32f4bbSJosef Bacik static int btree_set_page_dirty(struct page *page) 10190b32f4bbSJosef Bacik { 1020bb146eb2SJosef Bacik #ifdef DEBUG 10210b32f4bbSJosef Bacik struct extent_buffer *eb; 10220b32f4bbSJosef Bacik 10230b32f4bbSJosef Bacik BUG_ON(!PagePrivate(page)); 10240b32f4bbSJosef Bacik eb = (struct extent_buffer *)page->private; 10250b32f4bbSJosef Bacik BUG_ON(!eb); 10260b32f4bbSJosef Bacik BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); 10270b32f4bbSJosef Bacik BUG_ON(!atomic_read(&eb->refs)); 10280b32f4bbSJosef Bacik btrfs_assert_tree_locked(eb); 1029bb146eb2SJosef Bacik #endif 10300b32f4bbSJosef Bacik return __set_page_dirty_nobuffers(page); 10310b32f4bbSJosef Bacik } 10320b32f4bbSJosef Bacik 10337f09410bSAlexey Dobriyan static const struct address_space_operations btree_aops = { 1034d98237b3SChris Mason .readpage = btree_readpage, 10350da5468fSChris Mason .writepages = btree_writepages, 10365f39d397SChris Mason .releasepage = btree_releasepage, 10375f39d397SChris Mason .invalidatepage = btree_invalidatepage, 10385a92bc88SChris Mason #ifdef CONFIG_MIGRATION 1039784b4e29SChris Mason .migratepage = btree_migratepage, 10405a92bc88SChris Mason #endif 10410b32f4bbSJosef Bacik .set_page_dirty = btree_set_page_dirty, 1042d98237b3SChris Mason }; 1043123abc88SChris Mason 1044ca7a79adSChris Mason int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, 1045ca7a79adSChris Mason u64 parent_transid) 1046090d1875SChris Mason { 10475f39d397SChris Mason struct extent_buffer *buf = NULL; 10485f39d397SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 1049de428b63SChris Mason int ret = 0; 1050090d1875SChris Mason 1051db94535dSChris Mason buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 10525f39d397SChris Mason if (!buf) 1053090d1875SChris Mason return 0; 1054d1310b2eSChris Mason read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, 1055bb82ab88SArne Jansen buf, 0, WAIT_NONE, btree_get_extent, 0); 10565f39d397SChris Mason free_extent_buffer(buf); 1057de428b63SChris Mason return ret; 1058090d1875SChris Mason } 1059090d1875SChris Mason 1060ab0fff03SArne Jansen int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, 1061ab0fff03SArne Jansen int mirror_num, struct extent_buffer **eb) 1062ab0fff03SArne Jansen { 1063ab0fff03SArne Jansen struct extent_buffer *buf = NULL; 1064ab0fff03SArne Jansen struct inode *btree_inode = root->fs_info->btree_inode; 1065ab0fff03SArne Jansen struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; 1066ab0fff03SArne Jansen int ret; 1067ab0fff03SArne Jansen 1068ab0fff03SArne Jansen buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 1069ab0fff03SArne Jansen if (!buf) 1070ab0fff03SArne Jansen return 0; 1071ab0fff03SArne Jansen 1072ab0fff03SArne Jansen set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); 1073ab0fff03SArne Jansen 1074ab0fff03SArne Jansen ret = read_extent_buffer_pages(io_tree, buf, 0, WAIT_PAGE_LOCK, 1075ab0fff03SArne Jansen btree_get_extent, mirror_num); 1076ab0fff03SArne Jansen if (ret) { 1077ab0fff03SArne Jansen free_extent_buffer(buf); 1078ab0fff03SArne Jansen return ret; 1079ab0fff03SArne Jansen } 1080ab0fff03SArne Jansen 1081ab0fff03SArne Jansen if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { 1082ab0fff03SArne Jansen free_extent_buffer(buf); 1083ab0fff03SArne Jansen return -EIO; 10840b32f4bbSJosef Bacik } else if (extent_buffer_uptodate(buf)) { 1085ab0fff03SArne Jansen *eb = buf; 1086ab0fff03SArne Jansen } else { 1087ab0fff03SArne Jansen free_extent_buffer(buf); 1088ab0fff03SArne Jansen } 1089ab0fff03SArne Jansen return 0; 1090ab0fff03SArne Jansen } 1091ab0fff03SArne Jansen 10920999df54SChris Mason struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, 10930999df54SChris Mason u64 bytenr, u32 blocksize) 10940999df54SChris Mason { 10950999df54SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 10960999df54SChris Mason struct extent_buffer *eb; 10970999df54SChris Mason eb = find_extent_buffer(&BTRFS_I(btree_inode)->io_tree, 1098f09d1f60SDavid Sterba bytenr, blocksize); 10990999df54SChris Mason return eb; 11000999df54SChris Mason } 11010999df54SChris Mason 11020999df54SChris Mason struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, 11030999df54SChris Mason u64 bytenr, u32 blocksize) 11040999df54SChris Mason { 11050999df54SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 11060999df54SChris Mason struct extent_buffer *eb; 11070999df54SChris Mason 11080999df54SChris Mason eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree, 1109727011e0SChris Mason bytenr, blocksize); 11100999df54SChris Mason return eb; 11110999df54SChris Mason } 11120999df54SChris Mason 11130999df54SChris Mason 1114e02119d5SChris Mason int btrfs_write_tree_block(struct extent_buffer *buf) 1115e02119d5SChris Mason { 1116727011e0SChris Mason return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, 11178aa38c31SChristoph Hellwig buf->start + buf->len - 1); 1118e02119d5SChris Mason } 1119e02119d5SChris Mason 1120e02119d5SChris Mason int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) 1121e02119d5SChris Mason { 1122727011e0SChris Mason return filemap_fdatawait_range(buf->pages[0]->mapping, 11238aa38c31SChristoph Hellwig buf->start, buf->start + buf->len - 1); 1124e02119d5SChris Mason } 1125e02119d5SChris Mason 1126db94535dSChris Mason struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, 1127ca7a79adSChris Mason u32 blocksize, u64 parent_transid) 1128e20d96d6SChris Mason { 11295f39d397SChris Mason struct extent_buffer *buf = NULL; 113019c00ddcSChris Mason int ret; 113119c00ddcSChris Mason 1132db94535dSChris Mason buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 11335f39d397SChris Mason if (!buf) 1134d98237b3SChris Mason return NULL; 1135e4204dedSChris Mason 1136ca7a79adSChris Mason ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 11375f39d397SChris Mason return buf; 1138ce9adaa5SChris Mason 1139eb60ceacSChris Mason } 1140eb60ceacSChris Mason 1141d5c13f92SJeff Mahoney void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, 11425f39d397SChris Mason struct extent_buffer *buf) 1143ed2ff2cbSChris Mason { 114455c69072SChris Mason if (btrfs_header_generation(buf) == 1145925baeddSChris Mason root->fs_info->running_transaction->transid) { 1146b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 1147b4ce94deSChris Mason 1148b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { 1149b9473439SChris Mason spin_lock(&root->fs_info->delalloc_lock); 1150b9473439SChris Mason if (root->fs_info->dirty_metadata_bytes >= buf->len) 1151b9473439SChris Mason root->fs_info->dirty_metadata_bytes -= buf->len; 1152d5c13f92SJeff Mahoney else { 1153d5c13f92SJeff Mahoney spin_unlock(&root->fs_info->delalloc_lock); 1154d5c13f92SJeff Mahoney btrfs_panic(root->fs_info, -EOVERFLOW, 1155d5c13f92SJeff Mahoney "Can't clear %lu bytes from " 1156533574c6SJoe Perches " dirty_mdatadata_bytes (%llu)", 1157d5c13f92SJeff Mahoney buf->len, 1158d5c13f92SJeff Mahoney root->fs_info->dirty_metadata_bytes); 1159d5c13f92SJeff Mahoney } 1160b9473439SChris Mason spin_unlock(&root->fs_info->delalloc_lock); 1161b4ce94deSChris Mason 1162b9473439SChris Mason /* ugh, clear_extent_buffer_dirty needs to lock the page */ 1163b9473439SChris Mason btrfs_set_lock_blocking(buf); 11640b32f4bbSJosef Bacik clear_extent_buffer_dirty(buf); 1165925baeddSChris Mason } 11665f39d397SChris Mason } 1167ed7b63ebSJosef Bacik } 11685f39d397SChris Mason 1169143bede5SJeff Mahoney static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, 117087ee04ebSChris Mason u32 stripesize, struct btrfs_root *root, 11719f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 1172e20d96d6SChris Mason u64 objectid) 1173d97e63b6SChris Mason { 1174cfaa7295SChris Mason root->node = NULL; 1175a28ec197SChris Mason root->commit_root = NULL; 1176db94535dSChris Mason root->sectorsize = sectorsize; 1177db94535dSChris Mason root->nodesize = nodesize; 1178db94535dSChris Mason root->leafsize = leafsize; 117987ee04ebSChris Mason root->stripesize = stripesize; 1180123abc88SChris Mason root->ref_cows = 0; 11810b86a832SChris Mason root->track_dirty = 0; 1182c71bf099SYan, Zheng root->in_radix = 0; 1183d68fc57bSYan, Zheng root->orphan_item_inserted = 0; 1184d68fc57bSYan, Zheng root->orphan_cleanup_state = 0; 11850b86a832SChris Mason 11860f7d52f4SChris Mason root->objectid = objectid; 11870f7d52f4SChris Mason root->last_trans = 0; 118813a8a7c8SYan, Zheng root->highest_objectid = 0; 118958176a96SJosef Bacik root->name = NULL; 11906bef4d31SEric Paris root->inode_tree = RB_ROOT; 119116cdcec7SMiao Xie INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); 1192f0486c68SYan, Zheng root->block_rsv = NULL; 1193d68fc57bSYan, Zheng root->orphan_block_rsv = NULL; 11940b86a832SChris Mason 11950b86a832SChris Mason INIT_LIST_HEAD(&root->dirty_list); 11965d4f98a2SYan Zheng INIT_LIST_HEAD(&root->root_list); 1197d68fc57bSYan, Zheng spin_lock_init(&root->orphan_lock); 11985d4f98a2SYan Zheng spin_lock_init(&root->inode_lock); 1199f0486c68SYan, Zheng spin_lock_init(&root->accounting_lock); 1200a2135011SChris Mason mutex_init(&root->objectid_mutex); 1201e02119d5SChris Mason mutex_init(&root->log_mutex); 12027237f183SYan Zheng init_waitqueue_head(&root->log_writer_wait); 12037237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[0]); 12047237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[1]); 12057237f183SYan Zheng atomic_set(&root->log_commit[0], 0); 12067237f183SYan Zheng atomic_set(&root->log_commit[1], 0); 12077237f183SYan Zheng atomic_set(&root->log_writers, 0); 12082ecb7923SMiao Xie atomic_set(&root->log_batch, 0); 12098a35d95fSJosef Bacik atomic_set(&root->orphan_inodes, 0); 12107237f183SYan Zheng root->log_transid = 0; 1211257c62e1SChris Mason root->last_log_commit = 0; 1212d0c803c4SChris Mason extent_io_tree_init(&root->dirty_log_pages, 1213f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 1214017e5369SChris Mason 12153768f368SChris Mason memset(&root->root_key, 0, sizeof(root->root_key)); 12163768f368SChris Mason memset(&root->root_item, 0, sizeof(root->root_item)); 12176702ed49SChris Mason memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); 121858176a96SJosef Bacik memset(&root->root_kobj, 0, sizeof(root->root_kobj)); 12193f157a2fSChris Mason root->defrag_trans_start = fs_info->generation; 122058176a96SJosef Bacik init_completion(&root->kobj_unregister); 12216702ed49SChris Mason root->defrag_running = 0; 12224d775673SChris Mason root->root_key.objectid = objectid; 12230ee5dc67SAl Viro root->anon_dev = 0; 12248ea05e3aSAlexander Block 12255f3ab90aSAnand Jain spin_lock_init(&root->root_item_lock); 12263768f368SChris Mason } 12273768f368SChris Mason 1228200a5c17SJeff Mahoney static int __must_check find_and_setup_root(struct btrfs_root *tree_root, 12299f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 12309f5fae2fSChris Mason u64 objectid, 1231e20d96d6SChris Mason struct btrfs_root *root) 12323768f368SChris Mason { 12333768f368SChris Mason int ret; 1234db94535dSChris Mason u32 blocksize; 123584234f3aSYan Zheng u64 generation; 12363768f368SChris Mason 1237db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 123887ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 123987ee04ebSChris Mason root, fs_info, objectid); 12403768f368SChris Mason ret = btrfs_find_last_root(tree_root, objectid, 12413768f368SChris Mason &root->root_item, &root->root_key); 12424df27c4dSYan, Zheng if (ret > 0) 12434df27c4dSYan, Zheng return -ENOENT; 1244200a5c17SJeff Mahoney else if (ret < 0) 1245200a5c17SJeff Mahoney return ret; 12463768f368SChris Mason 124784234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1248db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1249af31f5e5SChris Mason root->commit_root = NULL; 1250db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 125184234f3aSYan Zheng blocksize, generation); 1252b9fab919SChris Mason if (!root->node || !btrfs_buffer_uptodate(root->node, generation, 0)) { 125368433b73SChris Mason free_extent_buffer(root->node); 1254af31f5e5SChris Mason root->node = NULL; 125568433b73SChris Mason return -EIO; 125668433b73SChris Mason } 12574df27c4dSYan, Zheng root->commit_root = btrfs_root_node(root); 1258d97e63b6SChris Mason return 0; 1259d97e63b6SChris Mason } 1260d97e63b6SChris Mason 1261f84a8bd6SAl Viro static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info) 12626f07e42eSAl Viro { 12636f07e42eSAl Viro struct btrfs_root *root = kzalloc(sizeof(*root), GFP_NOFS); 12646f07e42eSAl Viro if (root) 12656f07e42eSAl Viro root->fs_info = fs_info; 12666f07e42eSAl Viro return root; 12676f07e42eSAl Viro } 12686f07e42eSAl Viro 126920897f5cSArne Jansen struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, 127020897f5cSArne Jansen struct btrfs_fs_info *fs_info, 127120897f5cSArne Jansen u64 objectid) 127220897f5cSArne Jansen { 127320897f5cSArne Jansen struct extent_buffer *leaf; 127420897f5cSArne Jansen struct btrfs_root *tree_root = fs_info->tree_root; 127520897f5cSArne Jansen struct btrfs_root *root; 127620897f5cSArne Jansen struct btrfs_key key; 127720897f5cSArne Jansen int ret = 0; 127820897f5cSArne Jansen u64 bytenr; 127920897f5cSArne Jansen 128020897f5cSArne Jansen root = btrfs_alloc_root(fs_info); 128120897f5cSArne Jansen if (!root) 128220897f5cSArne Jansen return ERR_PTR(-ENOMEM); 128320897f5cSArne Jansen 128420897f5cSArne Jansen __setup_root(tree_root->nodesize, tree_root->leafsize, 128520897f5cSArne Jansen tree_root->sectorsize, tree_root->stripesize, 128620897f5cSArne Jansen root, fs_info, objectid); 128720897f5cSArne Jansen root->root_key.objectid = objectid; 128820897f5cSArne Jansen root->root_key.type = BTRFS_ROOT_ITEM_KEY; 128920897f5cSArne Jansen root->root_key.offset = 0; 129020897f5cSArne Jansen 129120897f5cSArne Jansen leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 129220897f5cSArne Jansen 0, objectid, NULL, 0, 0, 0); 129320897f5cSArne Jansen if (IS_ERR(leaf)) { 129420897f5cSArne Jansen ret = PTR_ERR(leaf); 129520897f5cSArne Jansen goto fail; 129620897f5cSArne Jansen } 129720897f5cSArne Jansen 129820897f5cSArne Jansen bytenr = leaf->start; 129920897f5cSArne Jansen memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 130020897f5cSArne Jansen btrfs_set_header_bytenr(leaf, leaf->start); 130120897f5cSArne Jansen btrfs_set_header_generation(leaf, trans->transid); 130220897f5cSArne Jansen btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 130320897f5cSArne Jansen btrfs_set_header_owner(leaf, objectid); 130420897f5cSArne Jansen root->node = leaf; 130520897f5cSArne Jansen 130620897f5cSArne Jansen write_extent_buffer(leaf, fs_info->fsid, 130720897f5cSArne Jansen (unsigned long)btrfs_header_fsid(leaf), 130820897f5cSArne Jansen BTRFS_FSID_SIZE); 130920897f5cSArne Jansen write_extent_buffer(leaf, fs_info->chunk_tree_uuid, 131020897f5cSArne Jansen (unsigned long)btrfs_header_chunk_tree_uuid(leaf), 131120897f5cSArne Jansen BTRFS_UUID_SIZE); 131220897f5cSArne Jansen btrfs_mark_buffer_dirty(leaf); 131320897f5cSArne Jansen 131420897f5cSArne Jansen root->commit_root = btrfs_root_node(root); 131520897f5cSArne Jansen root->track_dirty = 1; 131620897f5cSArne Jansen 131720897f5cSArne Jansen 131820897f5cSArne Jansen root->root_item.flags = 0; 131920897f5cSArne Jansen root->root_item.byte_limit = 0; 132020897f5cSArne Jansen btrfs_set_root_bytenr(&root->root_item, leaf->start); 132120897f5cSArne Jansen btrfs_set_root_generation(&root->root_item, trans->transid); 132220897f5cSArne Jansen btrfs_set_root_level(&root->root_item, 0); 132320897f5cSArne Jansen btrfs_set_root_refs(&root->root_item, 1); 132420897f5cSArne Jansen btrfs_set_root_used(&root->root_item, leaf->len); 132520897f5cSArne Jansen btrfs_set_root_last_snapshot(&root->root_item, 0); 132620897f5cSArne Jansen btrfs_set_root_dirid(&root->root_item, 0); 132720897f5cSArne Jansen root->root_item.drop_level = 0; 132820897f5cSArne Jansen 132920897f5cSArne Jansen key.objectid = objectid; 133020897f5cSArne Jansen key.type = BTRFS_ROOT_ITEM_KEY; 133120897f5cSArne Jansen key.offset = 0; 133220897f5cSArne Jansen ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); 133320897f5cSArne Jansen if (ret) 133420897f5cSArne Jansen goto fail; 133520897f5cSArne Jansen 133620897f5cSArne Jansen btrfs_tree_unlock(leaf); 133720897f5cSArne Jansen 133820897f5cSArne Jansen fail: 133920897f5cSArne Jansen if (ret) 134020897f5cSArne Jansen return ERR_PTR(ret); 134120897f5cSArne Jansen 134220897f5cSArne Jansen return root; 134320897f5cSArne Jansen } 134420897f5cSArne Jansen 13457237f183SYan Zheng static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, 1346e02119d5SChris Mason struct btrfs_fs_info *fs_info) 13470f7d52f4SChris Mason { 13480f7d52f4SChris Mason struct btrfs_root *root; 13490f7d52f4SChris Mason struct btrfs_root *tree_root = fs_info->tree_root; 13507237f183SYan Zheng struct extent_buffer *leaf; 1351e02119d5SChris Mason 13526f07e42eSAl Viro root = btrfs_alloc_root(fs_info); 1353e02119d5SChris Mason if (!root) 13547237f183SYan Zheng return ERR_PTR(-ENOMEM); 1355e02119d5SChris Mason 1356e02119d5SChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 1357e02119d5SChris Mason tree_root->sectorsize, tree_root->stripesize, 1358e02119d5SChris Mason root, fs_info, BTRFS_TREE_LOG_OBJECTID); 1359e02119d5SChris Mason 1360e02119d5SChris Mason root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 1361e02119d5SChris Mason root->root_key.type = BTRFS_ROOT_ITEM_KEY; 1362e02119d5SChris Mason root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 13637237f183SYan Zheng /* 13647237f183SYan Zheng * log trees do not get reference counted because they go away 13657237f183SYan Zheng * before a real commit is actually done. They do store pointers 13667237f183SYan Zheng * to file data extents, and those reference counts still get 13677237f183SYan Zheng * updated (along with back refs to the log tree). 13687237f183SYan Zheng */ 1369e02119d5SChris Mason root->ref_cows = 0; 1370e02119d5SChris Mason 13715d4f98a2SYan Zheng leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, 137266d7e7f0SArne Jansen BTRFS_TREE_LOG_OBJECTID, NULL, 13735581a51aSJan Schmidt 0, 0, 0); 13747237f183SYan Zheng if (IS_ERR(leaf)) { 13757237f183SYan Zheng kfree(root); 13767237f183SYan Zheng return ERR_CAST(leaf); 13777237f183SYan Zheng } 1378e02119d5SChris Mason 13795d4f98a2SYan Zheng memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 13805d4f98a2SYan Zheng btrfs_set_header_bytenr(leaf, leaf->start); 13815d4f98a2SYan Zheng btrfs_set_header_generation(leaf, trans->transid); 13825d4f98a2SYan Zheng btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 13835d4f98a2SYan Zheng btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); 13847237f183SYan Zheng root->node = leaf; 1385e02119d5SChris Mason 1386e02119d5SChris Mason write_extent_buffer(root->node, root->fs_info->fsid, 1387e02119d5SChris Mason (unsigned long)btrfs_header_fsid(root->node), 1388e02119d5SChris Mason BTRFS_FSID_SIZE); 1389e02119d5SChris Mason btrfs_mark_buffer_dirty(root->node); 1390e02119d5SChris Mason btrfs_tree_unlock(root->node); 13917237f183SYan Zheng return root; 13927237f183SYan Zheng } 13937237f183SYan Zheng 13947237f183SYan Zheng int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 13957237f183SYan Zheng struct btrfs_fs_info *fs_info) 13967237f183SYan Zheng { 13977237f183SYan Zheng struct btrfs_root *log_root; 13987237f183SYan Zheng 13997237f183SYan Zheng log_root = alloc_log_tree(trans, fs_info); 14007237f183SYan Zheng if (IS_ERR(log_root)) 14017237f183SYan Zheng return PTR_ERR(log_root); 14027237f183SYan Zheng WARN_ON(fs_info->log_root_tree); 14037237f183SYan Zheng fs_info->log_root_tree = log_root; 14047237f183SYan Zheng return 0; 14057237f183SYan Zheng } 14067237f183SYan Zheng 14077237f183SYan Zheng int btrfs_add_log_tree(struct btrfs_trans_handle *trans, 14087237f183SYan Zheng struct btrfs_root *root) 14097237f183SYan Zheng { 14107237f183SYan Zheng struct btrfs_root *log_root; 14117237f183SYan Zheng struct btrfs_inode_item *inode_item; 14127237f183SYan Zheng 14137237f183SYan Zheng log_root = alloc_log_tree(trans, root->fs_info); 14147237f183SYan Zheng if (IS_ERR(log_root)) 14157237f183SYan Zheng return PTR_ERR(log_root); 14167237f183SYan Zheng 14177237f183SYan Zheng log_root->last_trans = trans->transid; 14187237f183SYan Zheng log_root->root_key.offset = root->root_key.objectid; 14197237f183SYan Zheng 14207237f183SYan Zheng inode_item = &log_root->root_item.inode; 14217237f183SYan Zheng inode_item->generation = cpu_to_le64(1); 14227237f183SYan Zheng inode_item->size = cpu_to_le64(3); 14237237f183SYan Zheng inode_item->nlink = cpu_to_le32(1); 14247237f183SYan Zheng inode_item->nbytes = cpu_to_le64(root->leafsize); 14257237f183SYan Zheng inode_item->mode = cpu_to_le32(S_IFDIR | 0755); 14267237f183SYan Zheng 14275d4f98a2SYan Zheng btrfs_set_root_node(&log_root->root_item, log_root->node); 14287237f183SYan Zheng 14297237f183SYan Zheng WARN_ON(root->log_root); 14307237f183SYan Zheng root->log_root = log_root; 14317237f183SYan Zheng root->log_transid = 0; 1432257c62e1SChris Mason root->last_log_commit = 0; 1433e02119d5SChris Mason return 0; 1434e02119d5SChris Mason } 1435e02119d5SChris Mason 1436e02119d5SChris Mason struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, 1437e02119d5SChris Mason struct btrfs_key *location) 1438e02119d5SChris Mason { 1439e02119d5SChris Mason struct btrfs_root *root; 1440e02119d5SChris Mason struct btrfs_fs_info *fs_info = tree_root->fs_info; 14410f7d52f4SChris Mason struct btrfs_path *path; 14425f39d397SChris Mason struct extent_buffer *l; 144384234f3aSYan Zheng u64 generation; 1444db94535dSChris Mason u32 blocksize; 14450f7d52f4SChris Mason int ret = 0; 14468ea05e3aSAlexander Block int slot; 14470f7d52f4SChris Mason 14486f07e42eSAl Viro root = btrfs_alloc_root(fs_info); 14490cf6c620SChris Mason if (!root) 14500f7d52f4SChris Mason return ERR_PTR(-ENOMEM); 14510f7d52f4SChris Mason if (location->offset == (u64)-1) { 1452db94535dSChris Mason ret = find_and_setup_root(tree_root, fs_info, 14530f7d52f4SChris Mason location->objectid, root); 14540f7d52f4SChris Mason if (ret) { 14550f7d52f4SChris Mason kfree(root); 14560f7d52f4SChris Mason return ERR_PTR(ret); 14570f7d52f4SChris Mason } 145813a8a7c8SYan, Zheng goto out; 14590f7d52f4SChris Mason } 14600f7d52f4SChris Mason 1461db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 146287ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 146387ee04ebSChris Mason root, fs_info, location->objectid); 14640f7d52f4SChris Mason 14650f7d52f4SChris Mason path = btrfs_alloc_path(); 1466db5b493aSTsutomu Itoh if (!path) { 1467db5b493aSTsutomu Itoh kfree(root); 1468db5b493aSTsutomu Itoh return ERR_PTR(-ENOMEM); 1469db5b493aSTsutomu Itoh } 14700f7d52f4SChris Mason ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); 147113a8a7c8SYan, Zheng if (ret == 0) { 14725f39d397SChris Mason l = path->nodes[0]; 14738ea05e3aSAlexander Block slot = path->slots[0]; 14748ea05e3aSAlexander Block btrfs_read_root_item(tree_root, l, slot, &root->root_item); 147544b36eb2SYan Zheng memcpy(&root->root_key, location, sizeof(*location)); 147613a8a7c8SYan, Zheng } 14770f7d52f4SChris Mason btrfs_free_path(path); 14780f7d52f4SChris Mason if (ret) { 14795e540f77STsutomu Itoh kfree(root); 148013a8a7c8SYan, Zheng if (ret > 0) 148113a8a7c8SYan, Zheng ret = -ENOENT; 14820f7d52f4SChris Mason return ERR_PTR(ret); 14830f7d52f4SChris Mason } 148413a8a7c8SYan, Zheng 148584234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1486db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1487db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 148884234f3aSYan Zheng blocksize, generation); 14895d4f98a2SYan Zheng root->commit_root = btrfs_root_node(root); 149079787eaaSJeff Mahoney BUG_ON(!root->node); /* -ENOMEM */ 149113a8a7c8SYan, Zheng out: 149208fe4db1SLi Zefan if (location->objectid != BTRFS_TREE_LOG_OBJECTID) { 14930f7d52f4SChris Mason root->ref_cows = 1; 149408fe4db1SLi Zefan btrfs_check_and_init_root_item(&root->root_item); 149508fe4db1SLi Zefan } 149613a8a7c8SYan, Zheng 14975eda7b5eSChris Mason return root; 14985eda7b5eSChris Mason } 14995eda7b5eSChris Mason 1500edbd8d4eSChris Mason struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, 1501edbd8d4eSChris Mason struct btrfs_key *location) 15025eda7b5eSChris Mason { 15035eda7b5eSChris Mason struct btrfs_root *root; 15045eda7b5eSChris Mason int ret; 15055eda7b5eSChris Mason 1506edbd8d4eSChris Mason if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) 1507edbd8d4eSChris Mason return fs_info->tree_root; 1508edbd8d4eSChris Mason if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) 1509edbd8d4eSChris Mason return fs_info->extent_root; 15108f18cf13SChris Mason if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) 15118f18cf13SChris Mason return fs_info->chunk_root; 15128f18cf13SChris Mason if (location->objectid == BTRFS_DEV_TREE_OBJECTID) 15138f18cf13SChris Mason return fs_info->dev_root; 15140403e47eSYan Zheng if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) 15150403e47eSYan Zheng return fs_info->csum_root; 1516bcef60f2SArne Jansen if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) 1517bcef60f2SArne Jansen return fs_info->quota_root ? fs_info->quota_root : 1518bcef60f2SArne Jansen ERR_PTR(-ENOENT); 15194df27c4dSYan, Zheng again: 15204df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 15215eda7b5eSChris Mason root = radix_tree_lookup(&fs_info->fs_roots_radix, 15225eda7b5eSChris Mason (unsigned long)location->objectid); 15234df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 15245eda7b5eSChris Mason if (root) 15255eda7b5eSChris Mason return root; 15265eda7b5eSChris Mason 1527e02119d5SChris Mason root = btrfs_read_fs_root_no_radix(fs_info->tree_root, location); 15285eda7b5eSChris Mason if (IS_ERR(root)) 15295eda7b5eSChris Mason return root; 15303394e160SChris Mason 1531581bb050SLi Zefan root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); 1532581bb050SLi Zefan root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), 1533581bb050SLi Zefan GFP_NOFS); 153435a30d7cSDavid Sterba if (!root->free_ino_pinned || !root->free_ino_ctl) { 153535a30d7cSDavid Sterba ret = -ENOMEM; 1536581bb050SLi Zefan goto fail; 153735a30d7cSDavid Sterba } 1538581bb050SLi Zefan 1539581bb050SLi Zefan btrfs_init_free_ino_ctl(root); 1540581bb050SLi Zefan mutex_init(&root->fs_commit_mutex); 1541581bb050SLi Zefan spin_lock_init(&root->cache_lock); 1542581bb050SLi Zefan init_waitqueue_head(&root->cache_wait); 1543581bb050SLi Zefan 15440ee5dc67SAl Viro ret = get_anon_bdev(&root->anon_dev); 1545ac08aedfSChris Mason if (ret) 1546ac08aedfSChris Mason goto fail; 15473394e160SChris Mason 1548d68fc57bSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) { 1549d68fc57bSYan, Zheng ret = -ENOENT; 1550d68fc57bSYan, Zheng goto fail; 1551d68fc57bSYan, Zheng } 1552d68fc57bSYan, Zheng 1553d68fc57bSYan, Zheng ret = btrfs_find_orphan_item(fs_info->tree_root, location->objectid); 1554d68fc57bSYan, Zheng if (ret < 0) 1555d68fc57bSYan, Zheng goto fail; 1556d68fc57bSYan, Zheng if (ret == 0) 1557d68fc57bSYan, Zheng root->orphan_item_inserted = 1; 1558d68fc57bSYan, Zheng 15594df27c4dSYan, Zheng ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); 15604df27c4dSYan, Zheng if (ret) 15614df27c4dSYan, Zheng goto fail; 15624df27c4dSYan, Zheng 15634df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 15642619ba1fSChris Mason ret = radix_tree_insert(&fs_info->fs_roots_radix, 15652619ba1fSChris Mason (unsigned long)root->root_key.objectid, 15660f7d52f4SChris Mason root); 1567d68fc57bSYan, Zheng if (ret == 0) 15684df27c4dSYan, Zheng root->in_radix = 1; 1569d68fc57bSYan, Zheng 15704df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 15714df27c4dSYan, Zheng radix_tree_preload_end(); 15720f7d52f4SChris Mason if (ret) { 15734df27c4dSYan, Zheng if (ret == -EEXIST) { 15744df27c4dSYan, Zheng free_fs_root(root); 15754df27c4dSYan, Zheng goto again; 15760f7d52f4SChris Mason } 15774df27c4dSYan, Zheng goto fail; 15784df27c4dSYan, Zheng } 15794df27c4dSYan, Zheng 1580edbd8d4eSChris Mason ret = btrfs_find_dead_roots(fs_info->tree_root, 15815d4f98a2SYan Zheng root->root_key.objectid); 15824df27c4dSYan, Zheng WARN_ON(ret); 1583edbd8d4eSChris Mason return root; 15844df27c4dSYan, Zheng fail: 15854df27c4dSYan, Zheng free_fs_root(root); 15864df27c4dSYan, Zheng return ERR_PTR(ret); 1587edbd8d4eSChris Mason } 1588edbd8d4eSChris Mason 158904160088SChris Mason static int btrfs_congested_fn(void *congested_data, int bdi_bits) 159004160088SChris Mason { 159104160088SChris Mason struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; 159204160088SChris Mason int ret = 0; 159304160088SChris Mason struct btrfs_device *device; 159404160088SChris Mason struct backing_dev_info *bdi; 1595b7967db7SChris Mason 15961f78160cSXiao Guangrong rcu_read_lock(); 15971f78160cSXiao Guangrong list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { 1598dfe25020SChris Mason if (!device->bdev) 1599dfe25020SChris Mason continue; 160004160088SChris Mason bdi = blk_get_backing_dev_info(device->bdev); 160104160088SChris Mason if (bdi && bdi_congested(bdi, bdi_bits)) { 160204160088SChris Mason ret = 1; 160304160088SChris Mason break; 160404160088SChris Mason } 160504160088SChris Mason } 16061f78160cSXiao Guangrong rcu_read_unlock(); 160704160088SChris Mason return ret; 160804160088SChris Mason } 160904160088SChris Mason 161038b66988SChris Mason /* 1611ad081f14SJens Axboe * If this fails, caller must call bdi_destroy() to get rid of the 1612ad081f14SJens Axboe * bdi again. 1613ad081f14SJens Axboe */ 161404160088SChris Mason static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) 161504160088SChris Mason { 1616ad081f14SJens Axboe int err; 1617ad081f14SJens Axboe 1618ad081f14SJens Axboe bdi->capabilities = BDI_CAP_MAP_COPY; 1619e6d086d8SJens Axboe err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY); 1620ad081f14SJens Axboe if (err) 1621ad081f14SJens Axboe return err; 1622ad081f14SJens Axboe 16234575c9ccSChris Mason bdi->ra_pages = default_backing_dev_info.ra_pages; 162404160088SChris Mason bdi->congested_fn = btrfs_congested_fn; 162504160088SChris Mason bdi->congested_data = info; 162604160088SChris Mason return 0; 162704160088SChris Mason } 162804160088SChris Mason 16298b712842SChris Mason /* 16308b712842SChris Mason * called by the kthread helper functions to finally call the bio end_io 16318b712842SChris Mason * functions. This is where read checksum verification actually happens 16328b712842SChris Mason */ 16338b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work) 1634ce9adaa5SChris Mason { 1635ce9adaa5SChris Mason struct bio *bio; 16368b712842SChris Mason struct end_io_wq *end_io_wq; 16378b712842SChris Mason struct btrfs_fs_info *fs_info; 1638ce9adaa5SChris Mason int error; 1639ce9adaa5SChris Mason 16408b712842SChris Mason end_io_wq = container_of(work, struct end_io_wq, work); 1641ce9adaa5SChris Mason bio = end_io_wq->bio; 16428b712842SChris Mason fs_info = end_io_wq->info; 16438b712842SChris Mason 1644ce9adaa5SChris Mason error = end_io_wq->error; 1645ce9adaa5SChris Mason bio->bi_private = end_io_wq->private; 1646ce9adaa5SChris Mason bio->bi_end_io = end_io_wq->end_io; 1647ce9adaa5SChris Mason kfree(end_io_wq); 1648ce9adaa5SChris Mason bio_endio(bio, error); 1649ce9adaa5SChris Mason } 165044b8bd7eSChris Mason 1651a74a4b97SChris Mason static int cleaner_kthread(void *arg) 1652a74a4b97SChris Mason { 1653a74a4b97SChris Mason struct btrfs_root *root = arg; 1654a74a4b97SChris Mason 1655a74a4b97SChris Mason do { 165676dda93cSYan, Zheng if (!(root->fs_info->sb->s_flags & MS_RDONLY) && 165776dda93cSYan, Zheng mutex_trylock(&root->fs_info->cleaner_mutex)) { 165824bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 1659a74a4b97SChris Mason btrfs_clean_old_snapshots(root); 1660a74a4b97SChris Mason mutex_unlock(&root->fs_info->cleaner_mutex); 16614cb5300bSChris Mason btrfs_run_defrag_inodes(root->fs_info); 166276dda93cSYan, Zheng } 1663a74a4b97SChris Mason 1664a0acae0eSTejun Heo if (!try_to_freeze()) { 1665a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 16668929ecfaSYan, Zheng if (!kthread_should_stop()) 1667a74a4b97SChris Mason schedule(); 1668a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1669a74a4b97SChris Mason } 1670a74a4b97SChris Mason } while (!kthread_should_stop()); 1671a74a4b97SChris Mason return 0; 1672a74a4b97SChris Mason } 1673a74a4b97SChris Mason 1674a74a4b97SChris Mason static int transaction_kthread(void *arg) 1675a74a4b97SChris Mason { 1676a74a4b97SChris Mason struct btrfs_root *root = arg; 1677a74a4b97SChris Mason struct btrfs_trans_handle *trans; 1678a74a4b97SChris Mason struct btrfs_transaction *cur; 16798929ecfaSYan, Zheng u64 transid; 1680a74a4b97SChris Mason unsigned long now; 1681a74a4b97SChris Mason unsigned long delay; 1682914b2007SJan Kara bool cannot_commit; 1683a74a4b97SChris Mason 1684a74a4b97SChris Mason do { 1685914b2007SJan Kara cannot_commit = false; 1686a74a4b97SChris Mason delay = HZ * 30; 1687a74a4b97SChris Mason mutex_lock(&root->fs_info->transaction_kthread_mutex); 1688a74a4b97SChris Mason 1689a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 1690a74a4b97SChris Mason cur = root->fs_info->running_transaction; 1691a74a4b97SChris Mason if (!cur) { 1692a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1693a74a4b97SChris Mason goto sleep; 1694a74a4b97SChris Mason } 169531153d81SYan Zheng 1696a74a4b97SChris Mason now = get_seconds(); 16978929ecfaSYan, Zheng if (!cur->blocked && 16988929ecfaSYan, Zheng (now < cur->start_time || now - cur->start_time < 30)) { 1699a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1700a74a4b97SChris Mason delay = HZ * 5; 1701a74a4b97SChris Mason goto sleep; 1702a74a4b97SChris Mason } 17038929ecfaSYan, Zheng transid = cur->transid; 1704a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 170556bec294SChris Mason 170679787eaaSJeff Mahoney /* If the file system is aborted, this will always fail. */ 1707354aa0fbSMiao Xie trans = btrfs_attach_transaction(root); 1708914b2007SJan Kara if (IS_ERR(trans)) { 1709354aa0fbSMiao Xie if (PTR_ERR(trans) != -ENOENT) 1710914b2007SJan Kara cannot_commit = true; 171179787eaaSJeff Mahoney goto sleep; 1712914b2007SJan Kara } 17138929ecfaSYan, Zheng if (transid == trans->transid) { 171479787eaaSJeff Mahoney btrfs_commit_transaction(trans, root); 17158929ecfaSYan, Zheng } else { 17168929ecfaSYan, Zheng btrfs_end_transaction(trans, root); 17178929ecfaSYan, Zheng } 1718a74a4b97SChris Mason sleep: 1719a74a4b97SChris Mason wake_up_process(root->fs_info->cleaner_kthread); 1720a74a4b97SChris Mason mutex_unlock(&root->fs_info->transaction_kthread_mutex); 1721a74a4b97SChris Mason 1722a0acae0eSTejun Heo if (!try_to_freeze()) { 1723a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 17248929ecfaSYan, Zheng if (!kthread_should_stop() && 1725914b2007SJan Kara (!btrfs_transaction_blocked(root->fs_info) || 1726914b2007SJan Kara cannot_commit)) 1727a74a4b97SChris Mason schedule_timeout(delay); 1728a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1729a74a4b97SChris Mason } 1730a74a4b97SChris Mason } while (!kthread_should_stop()); 1731a74a4b97SChris Mason return 0; 1732a74a4b97SChris Mason } 1733a74a4b97SChris Mason 1734af31f5e5SChris Mason /* 1735af31f5e5SChris Mason * this will find the highest generation in the array of 1736af31f5e5SChris Mason * root backups. The index of the highest array is returned, 1737af31f5e5SChris Mason * or -1 if we can't find anything. 1738af31f5e5SChris Mason * 1739af31f5e5SChris Mason * We check to make sure the array is valid by comparing the 1740af31f5e5SChris Mason * generation of the latest root in the array with the generation 1741af31f5e5SChris Mason * in the super block. If they don't match we pitch it. 1742af31f5e5SChris Mason */ 1743af31f5e5SChris Mason static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) 1744af31f5e5SChris Mason { 1745af31f5e5SChris Mason u64 cur; 1746af31f5e5SChris Mason int newest_index = -1; 1747af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1748af31f5e5SChris Mason int i; 1749af31f5e5SChris Mason 1750af31f5e5SChris Mason for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 1751af31f5e5SChris Mason root_backup = info->super_copy->super_roots + i; 1752af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1753af31f5e5SChris Mason if (cur == newest_gen) 1754af31f5e5SChris Mason newest_index = i; 1755af31f5e5SChris Mason } 1756af31f5e5SChris Mason 1757af31f5e5SChris Mason /* check to see if we actually wrapped around */ 1758af31f5e5SChris Mason if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { 1759af31f5e5SChris Mason root_backup = info->super_copy->super_roots; 1760af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1761af31f5e5SChris Mason if (cur == newest_gen) 1762af31f5e5SChris Mason newest_index = 0; 1763af31f5e5SChris Mason } 1764af31f5e5SChris Mason return newest_index; 1765af31f5e5SChris Mason } 1766af31f5e5SChris Mason 1767af31f5e5SChris Mason 1768af31f5e5SChris Mason /* 1769af31f5e5SChris Mason * find the oldest backup so we know where to store new entries 1770af31f5e5SChris Mason * in the backup array. This will set the backup_root_index 1771af31f5e5SChris Mason * field in the fs_info struct 1772af31f5e5SChris Mason */ 1773af31f5e5SChris Mason static void find_oldest_super_backup(struct btrfs_fs_info *info, 1774af31f5e5SChris Mason u64 newest_gen) 1775af31f5e5SChris Mason { 1776af31f5e5SChris Mason int newest_index = -1; 1777af31f5e5SChris Mason 1778af31f5e5SChris Mason newest_index = find_newest_super_backup(info, newest_gen); 1779af31f5e5SChris Mason /* if there was garbage in there, just move along */ 1780af31f5e5SChris Mason if (newest_index == -1) { 1781af31f5e5SChris Mason info->backup_root_index = 0; 1782af31f5e5SChris Mason } else { 1783af31f5e5SChris Mason info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; 1784af31f5e5SChris Mason } 1785af31f5e5SChris Mason } 1786af31f5e5SChris Mason 1787af31f5e5SChris Mason /* 1788af31f5e5SChris Mason * copy all the root pointers into the super backup array. 1789af31f5e5SChris Mason * this will bump the backup pointer by one when it is 1790af31f5e5SChris Mason * done 1791af31f5e5SChris Mason */ 1792af31f5e5SChris Mason static void backup_super_roots(struct btrfs_fs_info *info) 1793af31f5e5SChris Mason { 1794af31f5e5SChris Mason int next_backup; 1795af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1796af31f5e5SChris Mason int last_backup; 1797af31f5e5SChris Mason 1798af31f5e5SChris Mason next_backup = info->backup_root_index; 1799af31f5e5SChris Mason last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % 1800af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1801af31f5e5SChris Mason 1802af31f5e5SChris Mason /* 1803af31f5e5SChris Mason * just overwrite the last backup if we're at the same generation 1804af31f5e5SChris Mason * this happens only at umount 1805af31f5e5SChris Mason */ 1806af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + last_backup; 1807af31f5e5SChris Mason if (btrfs_backup_tree_root_gen(root_backup) == 1808af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)) 1809af31f5e5SChris Mason next_backup = last_backup; 1810af31f5e5SChris Mason 1811af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + next_backup; 1812af31f5e5SChris Mason 1813af31f5e5SChris Mason /* 1814af31f5e5SChris Mason * make sure all of our padding and empty slots get zero filled 1815af31f5e5SChris Mason * regardless of which ones we use today 1816af31f5e5SChris Mason */ 1817af31f5e5SChris Mason memset(root_backup, 0, sizeof(*root_backup)); 1818af31f5e5SChris Mason 1819af31f5e5SChris Mason info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; 1820af31f5e5SChris Mason 1821af31f5e5SChris Mason btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); 1822af31f5e5SChris Mason btrfs_set_backup_tree_root_gen(root_backup, 1823af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)); 1824af31f5e5SChris Mason 1825af31f5e5SChris Mason btrfs_set_backup_tree_root_level(root_backup, 1826af31f5e5SChris Mason btrfs_header_level(info->tree_root->node)); 1827af31f5e5SChris Mason 1828af31f5e5SChris Mason btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); 1829af31f5e5SChris Mason btrfs_set_backup_chunk_root_gen(root_backup, 1830af31f5e5SChris Mason btrfs_header_generation(info->chunk_root->node)); 1831af31f5e5SChris Mason btrfs_set_backup_chunk_root_level(root_backup, 1832af31f5e5SChris Mason btrfs_header_level(info->chunk_root->node)); 1833af31f5e5SChris Mason 1834af31f5e5SChris Mason btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); 1835af31f5e5SChris Mason btrfs_set_backup_extent_root_gen(root_backup, 1836af31f5e5SChris Mason btrfs_header_generation(info->extent_root->node)); 1837af31f5e5SChris Mason btrfs_set_backup_extent_root_level(root_backup, 1838af31f5e5SChris Mason btrfs_header_level(info->extent_root->node)); 1839af31f5e5SChris Mason 18407c7e82a7SChris Mason /* 18417c7e82a7SChris Mason * we might commit during log recovery, which happens before we set 18427c7e82a7SChris Mason * the fs_root. Make sure it is valid before we fill it in. 18437c7e82a7SChris Mason */ 18447c7e82a7SChris Mason if (info->fs_root && info->fs_root->node) { 18457c7e82a7SChris Mason btrfs_set_backup_fs_root(root_backup, 18467c7e82a7SChris Mason info->fs_root->node->start); 1847af31f5e5SChris Mason btrfs_set_backup_fs_root_gen(root_backup, 1848af31f5e5SChris Mason btrfs_header_generation(info->fs_root->node)); 1849af31f5e5SChris Mason btrfs_set_backup_fs_root_level(root_backup, 1850af31f5e5SChris Mason btrfs_header_level(info->fs_root->node)); 18517c7e82a7SChris Mason } 1852af31f5e5SChris Mason 1853af31f5e5SChris Mason btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); 1854af31f5e5SChris Mason btrfs_set_backup_dev_root_gen(root_backup, 1855af31f5e5SChris Mason btrfs_header_generation(info->dev_root->node)); 1856af31f5e5SChris Mason btrfs_set_backup_dev_root_level(root_backup, 1857af31f5e5SChris Mason btrfs_header_level(info->dev_root->node)); 1858af31f5e5SChris Mason 1859af31f5e5SChris Mason btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); 1860af31f5e5SChris Mason btrfs_set_backup_csum_root_gen(root_backup, 1861af31f5e5SChris Mason btrfs_header_generation(info->csum_root->node)); 1862af31f5e5SChris Mason btrfs_set_backup_csum_root_level(root_backup, 1863af31f5e5SChris Mason btrfs_header_level(info->csum_root->node)); 1864af31f5e5SChris Mason 1865af31f5e5SChris Mason btrfs_set_backup_total_bytes(root_backup, 1866af31f5e5SChris Mason btrfs_super_total_bytes(info->super_copy)); 1867af31f5e5SChris Mason btrfs_set_backup_bytes_used(root_backup, 1868af31f5e5SChris Mason btrfs_super_bytes_used(info->super_copy)); 1869af31f5e5SChris Mason btrfs_set_backup_num_devices(root_backup, 1870af31f5e5SChris Mason btrfs_super_num_devices(info->super_copy)); 1871af31f5e5SChris Mason 1872af31f5e5SChris Mason /* 1873af31f5e5SChris Mason * if we don't copy this out to the super_copy, it won't get remembered 1874af31f5e5SChris Mason * for the next commit 1875af31f5e5SChris Mason */ 1876af31f5e5SChris Mason memcpy(&info->super_copy->super_roots, 1877af31f5e5SChris Mason &info->super_for_commit->super_roots, 1878af31f5e5SChris Mason sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); 1879af31f5e5SChris Mason } 1880af31f5e5SChris Mason 1881af31f5e5SChris Mason /* 1882af31f5e5SChris Mason * this copies info out of the root backup array and back into 1883af31f5e5SChris Mason * the in-memory super block. It is meant to help iterate through 1884af31f5e5SChris Mason * the array, so you send it the number of backups you've already 1885af31f5e5SChris Mason * tried and the last backup index you used. 1886af31f5e5SChris Mason * 1887af31f5e5SChris Mason * this returns -1 when it has tried all the backups 1888af31f5e5SChris Mason */ 1889af31f5e5SChris Mason static noinline int next_root_backup(struct btrfs_fs_info *info, 1890af31f5e5SChris Mason struct btrfs_super_block *super, 1891af31f5e5SChris Mason int *num_backups_tried, int *backup_index) 1892af31f5e5SChris Mason { 1893af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1894af31f5e5SChris Mason int newest = *backup_index; 1895af31f5e5SChris Mason 1896af31f5e5SChris Mason if (*num_backups_tried == 0) { 1897af31f5e5SChris Mason u64 gen = btrfs_super_generation(super); 1898af31f5e5SChris Mason 1899af31f5e5SChris Mason newest = find_newest_super_backup(info, gen); 1900af31f5e5SChris Mason if (newest == -1) 1901af31f5e5SChris Mason return -1; 1902af31f5e5SChris Mason 1903af31f5e5SChris Mason *backup_index = newest; 1904af31f5e5SChris Mason *num_backups_tried = 1; 1905af31f5e5SChris Mason } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { 1906af31f5e5SChris Mason /* we've tried all the backups, all done */ 1907af31f5e5SChris Mason return -1; 1908af31f5e5SChris Mason } else { 1909af31f5e5SChris Mason /* jump to the next oldest backup */ 1910af31f5e5SChris Mason newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % 1911af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1912af31f5e5SChris Mason *backup_index = newest; 1913af31f5e5SChris Mason *num_backups_tried += 1; 1914af31f5e5SChris Mason } 1915af31f5e5SChris Mason root_backup = super->super_roots + newest; 1916af31f5e5SChris Mason 1917af31f5e5SChris Mason btrfs_set_super_generation(super, 1918af31f5e5SChris Mason btrfs_backup_tree_root_gen(root_backup)); 1919af31f5e5SChris Mason btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); 1920af31f5e5SChris Mason btrfs_set_super_root_level(super, 1921af31f5e5SChris Mason btrfs_backup_tree_root_level(root_backup)); 1922af31f5e5SChris Mason btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); 1923af31f5e5SChris Mason 1924af31f5e5SChris Mason /* 1925af31f5e5SChris Mason * fixme: the total bytes and num_devices need to match or we should 1926af31f5e5SChris Mason * need a fsck 1927af31f5e5SChris Mason */ 1928af31f5e5SChris Mason btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); 1929af31f5e5SChris Mason btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); 1930af31f5e5SChris Mason return 0; 1931af31f5e5SChris Mason } 1932af31f5e5SChris Mason 1933af31f5e5SChris Mason /* helper to cleanup tree roots */ 1934af31f5e5SChris Mason static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) 1935af31f5e5SChris Mason { 1936af31f5e5SChris Mason free_extent_buffer(info->tree_root->node); 1937af31f5e5SChris Mason free_extent_buffer(info->tree_root->commit_root); 1938af31f5e5SChris Mason free_extent_buffer(info->dev_root->node); 1939af31f5e5SChris Mason free_extent_buffer(info->dev_root->commit_root); 1940af31f5e5SChris Mason free_extent_buffer(info->extent_root->node); 1941af31f5e5SChris Mason free_extent_buffer(info->extent_root->commit_root); 1942af31f5e5SChris Mason free_extent_buffer(info->csum_root->node); 1943af31f5e5SChris Mason free_extent_buffer(info->csum_root->commit_root); 1944bcef60f2SArne Jansen if (info->quota_root) { 1945bcef60f2SArne Jansen free_extent_buffer(info->quota_root->node); 1946bcef60f2SArne Jansen free_extent_buffer(info->quota_root->commit_root); 1947bcef60f2SArne Jansen } 1948af31f5e5SChris Mason 1949af31f5e5SChris Mason info->tree_root->node = NULL; 1950af31f5e5SChris Mason info->tree_root->commit_root = NULL; 1951af31f5e5SChris Mason info->dev_root->node = NULL; 1952af31f5e5SChris Mason info->dev_root->commit_root = NULL; 1953af31f5e5SChris Mason info->extent_root->node = NULL; 1954af31f5e5SChris Mason info->extent_root->commit_root = NULL; 1955af31f5e5SChris Mason info->csum_root->node = NULL; 1956af31f5e5SChris Mason info->csum_root->commit_root = NULL; 1957bcef60f2SArne Jansen if (info->quota_root) { 1958bcef60f2SArne Jansen info->quota_root->node = NULL; 1959bcef60f2SArne Jansen info->quota_root->commit_root = NULL; 1960bcef60f2SArne Jansen } 1961af31f5e5SChris Mason 1962af31f5e5SChris Mason if (chunk_root) { 1963af31f5e5SChris Mason free_extent_buffer(info->chunk_root->node); 1964af31f5e5SChris Mason free_extent_buffer(info->chunk_root->commit_root); 1965af31f5e5SChris Mason info->chunk_root->node = NULL; 1966af31f5e5SChris Mason info->chunk_root->commit_root = NULL; 1967af31f5e5SChris Mason } 1968af31f5e5SChris Mason } 1969af31f5e5SChris Mason 1970af31f5e5SChris Mason 1971ad2b2c80SAl Viro int open_ctree(struct super_block *sb, 1972dfe25020SChris Mason struct btrfs_fs_devices *fs_devices, 1973dfe25020SChris Mason char *options) 1974eb60ceacSChris Mason { 1975db94535dSChris Mason u32 sectorsize; 1976db94535dSChris Mason u32 nodesize; 1977db94535dSChris Mason u32 leafsize; 1978db94535dSChris Mason u32 blocksize; 197987ee04ebSChris Mason u32 stripesize; 198084234f3aSYan Zheng u64 generation; 1981f2b636e8SJosef Bacik u64 features; 19823de4586cSChris Mason struct btrfs_key location; 1983a061fc8dSChris Mason struct buffer_head *bh; 19844d34b278SIlya Dryomov struct btrfs_super_block *disk_super; 1985815745cfSAl Viro struct btrfs_fs_info *fs_info = btrfs_sb(sb); 1986f84a8bd6SAl Viro struct btrfs_root *tree_root; 19874d34b278SIlya Dryomov struct btrfs_root *extent_root; 19884d34b278SIlya Dryomov struct btrfs_root *csum_root; 19894d34b278SIlya Dryomov struct btrfs_root *chunk_root; 19904d34b278SIlya Dryomov struct btrfs_root *dev_root; 1991bcef60f2SArne Jansen struct btrfs_root *quota_root; 1992e02119d5SChris Mason struct btrfs_root *log_tree_root; 1993eb60ceacSChris Mason int ret; 1994e58ca020SYan int err = -EINVAL; 1995af31f5e5SChris Mason int num_backups_tried = 0; 1996af31f5e5SChris Mason int backup_index = 0; 19974543df7eSChris Mason 1998f84a8bd6SAl Viro tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info); 19996f07e42eSAl Viro extent_root = fs_info->extent_root = btrfs_alloc_root(fs_info); 20006f07e42eSAl Viro csum_root = fs_info->csum_root = btrfs_alloc_root(fs_info); 20016f07e42eSAl Viro chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info); 20026f07e42eSAl Viro dev_root = fs_info->dev_root = btrfs_alloc_root(fs_info); 2003bcef60f2SArne Jansen quota_root = fs_info->quota_root = btrfs_alloc_root(fs_info); 20048790d502SChris Mason 2005f84a8bd6SAl Viro if (!tree_root || !extent_root || !csum_root || 2006bcef60f2SArne Jansen !chunk_root || !dev_root || !quota_root) { 200739279cc3SChris Mason err = -ENOMEM; 200839279cc3SChris Mason goto fail; 200939279cc3SChris Mason } 201076dda93cSYan, Zheng 201176dda93cSYan, Zheng ret = init_srcu_struct(&fs_info->subvol_srcu); 201276dda93cSYan, Zheng if (ret) { 201376dda93cSYan, Zheng err = ret; 201476dda93cSYan, Zheng goto fail; 201576dda93cSYan, Zheng } 201676dda93cSYan, Zheng 201776dda93cSYan, Zheng ret = setup_bdi(fs_info, &fs_info->bdi); 201876dda93cSYan, Zheng if (ret) { 201976dda93cSYan, Zheng err = ret; 202076dda93cSYan, Zheng goto fail_srcu; 202176dda93cSYan, Zheng } 202276dda93cSYan, Zheng 202376dda93cSYan, Zheng fs_info->btree_inode = new_inode(sb); 202476dda93cSYan, Zheng if (!fs_info->btree_inode) { 202576dda93cSYan, Zheng err = -ENOMEM; 202676dda93cSYan, Zheng goto fail_bdi; 202776dda93cSYan, Zheng } 202876dda93cSYan, Zheng 2029a6591715SChris Mason mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); 20301561dedaSMiao Xie 203176dda93cSYan, Zheng INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 20328fd17795SChris Mason INIT_LIST_HEAD(&fs_info->trans_list); 2033facda1e7SChris Mason INIT_LIST_HEAD(&fs_info->dead_roots); 203424bbcf04SYan, Zheng INIT_LIST_HEAD(&fs_info->delayed_iputs); 2035ea8c2819SChris Mason INIT_LIST_HEAD(&fs_info->delalloc_inodes); 20365a3f23d5SChris Mason INIT_LIST_HEAD(&fs_info->ordered_operations); 203711833d66SYan Zheng INIT_LIST_HEAD(&fs_info->caching_block_groups); 20381832a6d5SChris Mason spin_lock_init(&fs_info->delalloc_lock); 2039a4abeea4SJosef Bacik spin_lock_init(&fs_info->trans_lock); 204076dda93cSYan, Zheng spin_lock_init(&fs_info->fs_roots_radix_lock); 204124bbcf04SYan, Zheng spin_lock_init(&fs_info->delayed_iput_lock); 20424cb5300bSChris Mason spin_lock_init(&fs_info->defrag_inodes_lock); 20432bf64758SJosef Bacik spin_lock_init(&fs_info->free_chunk_lock); 2044f29021b2SJan Schmidt spin_lock_init(&fs_info->tree_mod_seq_lock); 2045f29021b2SJan Schmidt rwlock_init(&fs_info->tree_mod_log_lock); 20467585717fSChris Mason mutex_init(&fs_info->reloc_mutex); 204719c00ddcSChris Mason 204858176a96SJosef Bacik init_completion(&fs_info->kobj_unregister); 20490b86a832SChris Mason INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); 20506324fbf3SChris Mason INIT_LIST_HEAD(&fs_info->space_info); 2051f29021b2SJan Schmidt INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); 20520b86a832SChris Mason btrfs_mapping_init(&fs_info->mapping_tree); 205366d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->global_block_rsv, 205466d8f3ddSMiao Xie BTRFS_BLOCK_RSV_GLOBAL); 205566d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delalloc_block_rsv, 205666d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELALLOC); 205766d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); 205866d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); 205966d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); 206066d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delayed_block_rsv, 206166d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELOPS); 2062cb03c743SChris Mason atomic_set(&fs_info->nr_async_submits, 0); 2063771ed689SChris Mason atomic_set(&fs_info->async_delalloc_pages, 0); 20648c8bee1dSChris Mason atomic_set(&fs_info->async_submit_draining, 0); 20650986fe9eSChris Mason atomic_set(&fs_info->nr_async_bios, 0); 20664cb5300bSChris Mason atomic_set(&fs_info->defrag_running, 0); 2067f29021b2SJan Schmidt atomic_set(&fs_info->tree_mod_seq, 0); 2068e20d96d6SChris Mason fs_info->sb = sb; 20696f568d35SChris Mason fs_info->max_inline = 8192 * 1024; 20709ed74f2dSJosef Bacik fs_info->metadata_ratio = 0; 20714cb5300bSChris Mason fs_info->defrag_inodes = RB_ROOT; 2072a4abeea4SJosef Bacik fs_info->trans_no_join = 0; 20732bf64758SJosef Bacik fs_info->free_chunk_space = 0; 2074f29021b2SJan Schmidt fs_info->tree_mod_log = RB_ROOT; 2075c8b97818SChris Mason 207690519d66SArne Jansen /* readahead state */ 207790519d66SArne Jansen INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT); 207890519d66SArne Jansen spin_lock_init(&fs_info->reada_lock); 20792c90e5d6SChris Mason 2080b34b086cSChris Mason fs_info->thread_pool_size = min_t(unsigned long, 2081b34b086cSChris Mason num_online_cpus() + 2, 8); 20820afbaf8cSChris Mason 20833eaa2885SChris Mason INIT_LIST_HEAD(&fs_info->ordered_extents); 20843eaa2885SChris Mason spin_lock_init(&fs_info->ordered_extent_lock); 208516cdcec7SMiao Xie fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), 208616cdcec7SMiao Xie GFP_NOFS); 208716cdcec7SMiao Xie if (!fs_info->delayed_root) { 208816cdcec7SMiao Xie err = -ENOMEM; 208916cdcec7SMiao Xie goto fail_iput; 209016cdcec7SMiao Xie } 209116cdcec7SMiao Xie btrfs_init_delayed_root(fs_info->delayed_root); 20923eaa2885SChris Mason 2093a2de733cSArne Jansen mutex_init(&fs_info->scrub_lock); 2094a2de733cSArne Jansen atomic_set(&fs_info->scrubs_running, 0); 2095a2de733cSArne Jansen atomic_set(&fs_info->scrub_pause_req, 0); 2096a2de733cSArne Jansen atomic_set(&fs_info->scrubs_paused, 0); 2097a2de733cSArne Jansen atomic_set(&fs_info->scrub_cancel_req, 0); 2098a2de733cSArne Jansen init_waitqueue_head(&fs_info->scrub_pause_wait); 2099a2de733cSArne Jansen init_rwsem(&fs_info->scrub_super_lock); 2100a2de733cSArne Jansen fs_info->scrub_workers_refcnt = 0; 210121adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 210221adbd5cSStefan Behrens fs_info->check_integrity_print_mask = 0; 210321adbd5cSStefan Behrens #endif 2104a2de733cSArne Jansen 2105c9e9f97bSIlya Dryomov spin_lock_init(&fs_info->balance_lock); 2106c9e9f97bSIlya Dryomov mutex_init(&fs_info->balance_mutex); 2107837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_running, 0); 2108837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_pause_req, 0); 2109a7e99c69SIlya Dryomov atomic_set(&fs_info->balance_cancel_req, 0); 2110c9e9f97bSIlya Dryomov fs_info->balance_ctl = NULL; 2111837d5b6eSIlya Dryomov init_waitqueue_head(&fs_info->balance_wait_q); 2112a061fc8dSChris Mason 21130afbaf8cSChris Mason sb->s_blocksize = 4096; 21140afbaf8cSChris Mason sb->s_blocksize_bits = blksize_bits(4096); 211532a88aa1SJens Axboe sb->s_bdi = &fs_info->bdi; 21160afbaf8cSChris Mason 211776dda93cSYan, Zheng fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; 2118bfe86848SMiklos Szeredi set_nlink(fs_info->btree_inode, 1); 21190afbaf8cSChris Mason /* 21200afbaf8cSChris Mason * we set the i_size on the btree inode to the max possible int. 21210afbaf8cSChris Mason * the real end of the address space is determined by all of 21220afbaf8cSChris Mason * the devices in the system 21230afbaf8cSChris Mason */ 21240afbaf8cSChris Mason fs_info->btree_inode->i_size = OFFSET_MAX; 2125d98237b3SChris Mason fs_info->btree_inode->i_mapping->a_ops = &btree_aops; 212604160088SChris Mason fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; 212704160088SChris Mason 21285d4f98a2SYan Zheng RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); 2129d1310b2eSChris Mason extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, 2130f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 21310b32f4bbSJosef Bacik BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; 2132a8067e02SDavid Sterba extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); 21330da5468fSChris Mason 2134d1310b2eSChris Mason BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; 2135d1310b2eSChris Mason 21360f7d52f4SChris Mason BTRFS_I(fs_info->btree_inode)->root = tree_root; 21370f7d52f4SChris Mason memset(&BTRFS_I(fs_info->btree_inode)->location, 0, 21380f7d52f4SChris Mason sizeof(struct btrfs_key)); 213972ac3c0dSJosef Bacik set_bit(BTRFS_INODE_DUMMY, 214072ac3c0dSJosef Bacik &BTRFS_I(fs_info->btree_inode)->runtime_flags); 214122b0ebdaSChris Mason insert_inode_hash(fs_info->btree_inode); 214239279cc3SChris Mason 2143e02119d5SChris Mason spin_lock_init(&fs_info->block_group_cache_lock); 21446bef4d31SEric Paris fs_info->block_group_cache_tree = RB_ROOT; 2145925baeddSChris Mason 214611833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[0], 2147f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 214811833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[1], 2149f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 215011833d66SYan Zheng fs_info->pinned_extents = &fs_info->freed_extents[0]; 2151e6dcd2dcSChris Mason fs_info->do_barriers = 1; 2152f9295749SChris Mason 2153d98237b3SChris Mason 21545a3f23d5SChris Mason mutex_init(&fs_info->ordered_operations_mutex); 215530ae8467SChris Mason mutex_init(&fs_info->tree_log_mutex); 2156925baeddSChris Mason mutex_init(&fs_info->chunk_mutex); 2157925baeddSChris Mason mutex_init(&fs_info->transaction_kthread_mutex); 2158a74a4b97SChris Mason mutex_init(&fs_info->cleaner_mutex); 2159a74a4b97SChris Mason mutex_init(&fs_info->volume_mutex); 2160276e680dSYan Zheng init_rwsem(&fs_info->extent_commit_sem); 2161c71bf099SYan, Zheng init_rwsem(&fs_info->cleanup_work_sem); 216276dda93cSYan, Zheng init_rwsem(&fs_info->subvol_sem); 2163e922e087SStefan Behrens fs_info->dev_replace.lock_owner = 0; 2164e922e087SStefan Behrens atomic_set(&fs_info->dev_replace.nesting_level, 0); 2165e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); 2166e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock_management_lock); 2167e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock); 2168fa9c0d79SChris Mason 2169416ac51dSArne Jansen spin_lock_init(&fs_info->qgroup_lock); 2170416ac51dSArne Jansen fs_info->qgroup_tree = RB_ROOT; 2171416ac51dSArne Jansen INIT_LIST_HEAD(&fs_info->dirty_qgroups); 2172416ac51dSArne Jansen fs_info->qgroup_seq = 1; 2173416ac51dSArne Jansen fs_info->quota_enabled = 0; 2174416ac51dSArne Jansen fs_info->pending_quota_state = 0; 2175416ac51dSArne Jansen 2176fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); 2177fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->data_alloc_cluster); 2178fa9c0d79SChris Mason 21797d9eb12cSChris Mason init_waitqueue_head(&fs_info->transaction_throttle); 21803768f368SChris Mason init_waitqueue_head(&fs_info->transaction_wait); 2181bb9c12c9SSage Weil init_waitqueue_head(&fs_info->transaction_blocked_wait); 21824854ddd0SChris Mason init_waitqueue_head(&fs_info->async_submit_wait); 21839a8dd150SChris Mason 218453b381b3SDavid Woodhouse ret = btrfs_alloc_stripe_hash_table(fs_info); 218553b381b3SDavid Woodhouse if (ret) { 218653b381b3SDavid Woodhouse err = -ENOMEM; 218753b381b3SDavid Woodhouse goto fail_alloc; 218853b381b3SDavid Woodhouse } 218953b381b3SDavid Woodhouse 21900b86a832SChris Mason __setup_root(4096, 4096, 4096, 4096, tree_root, 21912c90e5d6SChris Mason fs_info, BTRFS_ROOT_TREE_OBJECTID); 21927eccb903SChris Mason 21933c4bb26bSChris Mason invalidate_bdev(fs_devices->latest_bdev); 2194a512bbf8SYan Zheng bh = btrfs_read_dev_super(fs_devices->latest_bdev); 219520b45077SDave Young if (!bh) { 219620b45077SDave Young err = -EINVAL; 219716cdcec7SMiao Xie goto fail_alloc; 219820b45077SDave Young } 219939279cc3SChris Mason 22006c41761fSDavid Sterba memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); 22016c41761fSDavid Sterba memcpy(fs_info->super_for_commit, fs_info->super_copy, 22026c41761fSDavid Sterba sizeof(*fs_info->super_for_commit)); 2203a061fc8dSChris Mason brelse(bh); 22045f39d397SChris Mason 22056c41761fSDavid Sterba memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); 22060b86a832SChris Mason 22076c41761fSDavid Sterba disk_super = fs_info->super_copy; 22080f7d52f4SChris Mason if (!btrfs_super_root(disk_super)) 220916cdcec7SMiao Xie goto fail_alloc; 22100f7d52f4SChris Mason 2211acce952bSliubo /* check FS state, whether FS is broken. */ 2212acce952bSliubo fs_info->fs_state |= btrfs_super_flags(disk_super); 2213acce952bSliubo 2214fcd1f065SDavid Sterba ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); 2215fcd1f065SDavid Sterba if (ret) { 2216fcd1f065SDavid Sterba printk(KERN_ERR "btrfs: superblock contains fatal errors\n"); 2217fcd1f065SDavid Sterba err = ret; 2218fcd1f065SDavid Sterba goto fail_alloc; 2219fcd1f065SDavid Sterba } 2220acce952bSliubo 222175e7cb7fSLiu Bo /* 2222af31f5e5SChris Mason * run through our array of backup supers and setup 2223af31f5e5SChris Mason * our ring pointer to the oldest one 2224af31f5e5SChris Mason */ 2225af31f5e5SChris Mason generation = btrfs_super_generation(disk_super); 2226af31f5e5SChris Mason find_oldest_super_backup(fs_info, generation); 2227af31f5e5SChris Mason 2228af31f5e5SChris Mason /* 222975e7cb7fSLiu Bo * In the long term, we'll store the compression type in the super 223075e7cb7fSLiu Bo * block, and it'll be used for per file compression control. 223175e7cb7fSLiu Bo */ 223275e7cb7fSLiu Bo fs_info->compress_type = BTRFS_COMPRESS_ZLIB; 223375e7cb7fSLiu Bo 22342b82032cSYan Zheng ret = btrfs_parse_options(tree_root, options); 22352b82032cSYan Zheng if (ret) { 22362b82032cSYan Zheng err = ret; 223716cdcec7SMiao Xie goto fail_alloc; 22382b82032cSYan Zheng } 2239dfe25020SChris Mason 2240f2b636e8SJosef Bacik features = btrfs_super_incompat_flags(disk_super) & 2241f2b636e8SJosef Bacik ~BTRFS_FEATURE_INCOMPAT_SUPP; 2242f2b636e8SJosef Bacik if (features) { 2243f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount because of " 2244f2b636e8SJosef Bacik "unsupported optional features (%Lx).\n", 224521380931SJoel Becker (unsigned long long)features); 2246f2b636e8SJosef Bacik err = -EINVAL; 224716cdcec7SMiao Xie goto fail_alloc; 2248f2b636e8SJosef Bacik } 2249f2b636e8SJosef Bacik 2250727011e0SChris Mason if (btrfs_super_leafsize(disk_super) != 2251727011e0SChris Mason btrfs_super_nodesize(disk_super)) { 2252727011e0SChris Mason printk(KERN_ERR "BTRFS: couldn't mount because metadata " 2253727011e0SChris Mason "blocksizes don't match. node %d leaf %d\n", 2254727011e0SChris Mason btrfs_super_nodesize(disk_super), 2255727011e0SChris Mason btrfs_super_leafsize(disk_super)); 2256727011e0SChris Mason err = -EINVAL; 2257727011e0SChris Mason goto fail_alloc; 2258727011e0SChris Mason } 2259727011e0SChris Mason if (btrfs_super_leafsize(disk_super) > BTRFS_MAX_METADATA_BLOCKSIZE) { 2260727011e0SChris Mason printk(KERN_ERR "BTRFS: couldn't mount because metadata " 2261727011e0SChris Mason "blocksize (%d) was too large\n", 2262727011e0SChris Mason btrfs_super_leafsize(disk_super)); 2263727011e0SChris Mason err = -EINVAL; 2264727011e0SChris Mason goto fail_alloc; 2265727011e0SChris Mason } 2266727011e0SChris Mason 22675d4f98a2SYan Zheng features = btrfs_super_incompat_flags(disk_super); 22685d4f98a2SYan Zheng features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; 226969e380d1SLi Zefan if (tree_root->fs_info->compress_type == BTRFS_COMPRESS_LZO) 2270a6fa6faeSLi Zefan features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; 2271727011e0SChris Mason 2272727011e0SChris Mason /* 2273727011e0SChris Mason * flag our filesystem as having big metadata blocks if 2274727011e0SChris Mason * they are bigger than the page size 2275727011e0SChris Mason */ 2276727011e0SChris Mason if (btrfs_super_leafsize(disk_super) > PAGE_CACHE_SIZE) { 2277727011e0SChris Mason if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) 2278727011e0SChris Mason printk(KERN_INFO "btrfs flagging fs with big metadata feature\n"); 2279727011e0SChris Mason features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; 2280727011e0SChris Mason } 2281727011e0SChris Mason 2282bc3f116fSChris Mason nodesize = btrfs_super_nodesize(disk_super); 2283bc3f116fSChris Mason leafsize = btrfs_super_leafsize(disk_super); 2284bc3f116fSChris Mason sectorsize = btrfs_super_sectorsize(disk_super); 2285bc3f116fSChris Mason stripesize = btrfs_super_stripesize(disk_super); 2286bc3f116fSChris Mason 2287bc3f116fSChris Mason /* 2288bc3f116fSChris Mason * mixed block groups end up with duplicate but slightly offset 2289bc3f116fSChris Mason * extent buffers for the same range. It leads to corruptions 2290bc3f116fSChris Mason */ 2291bc3f116fSChris Mason if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && 2292bc3f116fSChris Mason (sectorsize != leafsize)) { 2293bc3f116fSChris Mason printk(KERN_WARNING "btrfs: unequal leaf/node/sector sizes " 2294bc3f116fSChris Mason "are not allowed for mixed block groups on %s\n", 2295bc3f116fSChris Mason sb->s_id); 2296bc3f116fSChris Mason goto fail_alloc; 2297bc3f116fSChris Mason } 2298bc3f116fSChris Mason 22995d4f98a2SYan Zheng btrfs_set_super_incompat_flags(disk_super, features); 23005d4f98a2SYan Zheng 2301f2b636e8SJosef Bacik features = btrfs_super_compat_ro_flags(disk_super) & 2302f2b636e8SJosef Bacik ~BTRFS_FEATURE_COMPAT_RO_SUPP; 2303f2b636e8SJosef Bacik if (!(sb->s_flags & MS_RDONLY) && features) { 2304f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount RDWR because of " 2305f2b636e8SJosef Bacik "unsupported option features (%Lx).\n", 230621380931SJoel Becker (unsigned long long)features); 2307f2b636e8SJosef Bacik err = -EINVAL; 230816cdcec7SMiao Xie goto fail_alloc; 2309f2b636e8SJosef Bacik } 231061d92c32SChris Mason 231161d92c32SChris Mason btrfs_init_workers(&fs_info->generic_worker, 231261d92c32SChris Mason "genwork", 1, NULL); 231361d92c32SChris Mason 23145443be45SChris Mason btrfs_init_workers(&fs_info->workers, "worker", 231561d92c32SChris Mason fs_info->thread_pool_size, 231661d92c32SChris Mason &fs_info->generic_worker); 2317c8b97818SChris Mason 2318771ed689SChris Mason btrfs_init_workers(&fs_info->delalloc_workers, "delalloc", 231961d92c32SChris Mason fs_info->thread_pool_size, 232061d92c32SChris Mason &fs_info->generic_worker); 2321771ed689SChris Mason 23228ccf6f19SMiao Xie btrfs_init_workers(&fs_info->flush_workers, "flush_delalloc", 23238ccf6f19SMiao Xie fs_info->thread_pool_size, 23248ccf6f19SMiao Xie &fs_info->generic_worker); 23258ccf6f19SMiao Xie 23265443be45SChris Mason btrfs_init_workers(&fs_info->submit_workers, "submit", 2327b720d209SChris Mason min_t(u64, fs_devices->num_devices, 232861d92c32SChris Mason fs_info->thread_pool_size), 232961d92c32SChris Mason &fs_info->generic_worker); 233061b49440SChris Mason 2331bab39bf9SJosef Bacik btrfs_init_workers(&fs_info->caching_workers, "cache", 2332bab39bf9SJosef Bacik 2, &fs_info->generic_worker); 2333bab39bf9SJosef Bacik 233461b49440SChris Mason /* a higher idle thresh on the submit workers makes it much more 233561b49440SChris Mason * likely that bios will be send down in a sane order to the 233661b49440SChris Mason * devices 233761b49440SChris Mason */ 233861b49440SChris Mason fs_info->submit_workers.idle_thresh = 64; 233953863232SChris Mason 2340771ed689SChris Mason fs_info->workers.idle_thresh = 16; 23414a69a410SChris Mason fs_info->workers.ordered = 1; 234261b49440SChris Mason 2343771ed689SChris Mason fs_info->delalloc_workers.idle_thresh = 2; 2344771ed689SChris Mason fs_info->delalloc_workers.ordered = 1; 2345771ed689SChris Mason 234661d92c32SChris Mason btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1, 234761d92c32SChris Mason &fs_info->generic_worker); 23485443be45SChris Mason btrfs_init_workers(&fs_info->endio_workers, "endio", 234961d92c32SChris Mason fs_info->thread_pool_size, 235061d92c32SChris Mason &fs_info->generic_worker); 2351d20f7043SChris Mason btrfs_init_workers(&fs_info->endio_meta_workers, "endio-meta", 235261d92c32SChris Mason fs_info->thread_pool_size, 235361d92c32SChris Mason &fs_info->generic_worker); 2354cad321adSChris Mason btrfs_init_workers(&fs_info->endio_meta_write_workers, 235561d92c32SChris Mason "endio-meta-write", fs_info->thread_pool_size, 235661d92c32SChris Mason &fs_info->generic_worker); 235753b381b3SDavid Woodhouse btrfs_init_workers(&fs_info->endio_raid56_workers, 235853b381b3SDavid Woodhouse "endio-raid56", fs_info->thread_pool_size, 235953b381b3SDavid Woodhouse &fs_info->generic_worker); 236053b381b3SDavid Woodhouse btrfs_init_workers(&fs_info->rmw_workers, 236153b381b3SDavid Woodhouse "rmw", fs_info->thread_pool_size, 236253b381b3SDavid Woodhouse &fs_info->generic_worker); 23635443be45SChris Mason btrfs_init_workers(&fs_info->endio_write_workers, "endio-write", 236461d92c32SChris Mason fs_info->thread_pool_size, 236561d92c32SChris Mason &fs_info->generic_worker); 23660cb59c99SJosef Bacik btrfs_init_workers(&fs_info->endio_freespace_worker, "freespace-write", 23670cb59c99SJosef Bacik 1, &fs_info->generic_worker); 236816cdcec7SMiao Xie btrfs_init_workers(&fs_info->delayed_workers, "delayed-meta", 236916cdcec7SMiao Xie fs_info->thread_pool_size, 237016cdcec7SMiao Xie &fs_info->generic_worker); 237190519d66SArne Jansen btrfs_init_workers(&fs_info->readahead_workers, "readahead", 237290519d66SArne Jansen fs_info->thread_pool_size, 237390519d66SArne Jansen &fs_info->generic_worker); 237461b49440SChris Mason 237561b49440SChris Mason /* 237661b49440SChris Mason * endios are largely parallel and should have a very 237761b49440SChris Mason * low idle thresh 237861b49440SChris Mason */ 237961b49440SChris Mason fs_info->endio_workers.idle_thresh = 4; 2380b51912c9SChris Mason fs_info->endio_meta_workers.idle_thresh = 4; 238153b381b3SDavid Woodhouse fs_info->endio_raid56_workers.idle_thresh = 4; 238253b381b3SDavid Woodhouse fs_info->rmw_workers.idle_thresh = 2; 2383b51912c9SChris Mason 23849042846bSChris Mason fs_info->endio_write_workers.idle_thresh = 2; 23859042846bSChris Mason fs_info->endio_meta_write_workers.idle_thresh = 2; 238690519d66SArne Jansen fs_info->readahead_workers.idle_thresh = 2; 23879042846bSChris Mason 23880dc3b84aSJosef Bacik /* 23890dc3b84aSJosef Bacik * btrfs_start_workers can really only fail because of ENOMEM so just 23900dc3b84aSJosef Bacik * return -ENOMEM if any of these fail. 23910dc3b84aSJosef Bacik */ 23920dc3b84aSJosef Bacik ret = btrfs_start_workers(&fs_info->workers); 23930dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->generic_worker); 23940dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->submit_workers); 23950dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delalloc_workers); 23960dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->fixup_workers); 23970dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_workers); 23980dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_workers); 239953b381b3SDavid Woodhouse ret |= btrfs_start_workers(&fs_info->rmw_workers); 240053b381b3SDavid Woodhouse ret |= btrfs_start_workers(&fs_info->endio_raid56_workers); 24010dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_write_workers); 24020dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_write_workers); 24030dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_freespace_worker); 24040dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delayed_workers); 24050dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->caching_workers); 24060dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->readahead_workers); 24078ccf6f19SMiao Xie ret |= btrfs_start_workers(&fs_info->flush_workers); 24080dc3b84aSJosef Bacik if (ret) { 2409fed425c7SIlya Dryomov err = -ENOMEM; 24100dc3b84aSJosef Bacik goto fail_sb_buffer; 24110dc3b84aSJosef Bacik } 24124543df7eSChris Mason 24134575c9ccSChris Mason fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); 2414c8b97818SChris Mason fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, 2415c8b97818SChris Mason 4 * 1024 * 1024 / PAGE_CACHE_SIZE); 24164575c9ccSChris Mason 2417db94535dSChris Mason tree_root->nodesize = nodesize; 2418db94535dSChris Mason tree_root->leafsize = leafsize; 2419db94535dSChris Mason tree_root->sectorsize = sectorsize; 242087ee04ebSChris Mason tree_root->stripesize = stripesize; 2421a061fc8dSChris Mason 2422a061fc8dSChris Mason sb->s_blocksize = sectorsize; 2423a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(sectorsize); 2424db94535dSChris Mason 242539279cc3SChris Mason if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC, 242639279cc3SChris Mason sizeof(disk_super->magic))) { 2427d397712bSChris Mason printk(KERN_INFO "btrfs: valid FS not found on %s\n", sb->s_id); 242839279cc3SChris Mason goto fail_sb_buffer; 242939279cc3SChris Mason } 243019c00ddcSChris Mason 24318d082fb7SLiu Bo if (sectorsize != PAGE_SIZE) { 24328d082fb7SLiu Bo printk(KERN_WARNING "btrfs: Incompatible sector size(%lu) " 24338d082fb7SLiu Bo "found on %s\n", (unsigned long)sectorsize, sb->s_id); 2434941b2ddfSKeith Mannthey goto fail_sb_buffer; 2435941b2ddfSKeith Mannthey } 2436941b2ddfSKeith Mannthey 2437925baeddSChris Mason mutex_lock(&fs_info->chunk_mutex); 2438e4404d6eSYan Zheng ret = btrfs_read_sys_array(tree_root); 2439925baeddSChris Mason mutex_unlock(&fs_info->chunk_mutex); 244084eed90fSChris Mason if (ret) { 2441d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read the system " 2442d397712bSChris Mason "array on %s\n", sb->s_id); 24435d4f98a2SYan Zheng goto fail_sb_buffer; 244484eed90fSChris Mason } 24450b86a832SChris Mason 24460b86a832SChris Mason blocksize = btrfs_level_size(tree_root, 24470b86a832SChris Mason btrfs_super_chunk_root_level(disk_super)); 244884234f3aSYan Zheng generation = btrfs_super_chunk_root_generation(disk_super); 24490b86a832SChris Mason 24500b86a832SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 24510b86a832SChris Mason chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); 24520b86a832SChris Mason 24530b86a832SChris Mason chunk_root->node = read_tree_block(chunk_root, 24540b86a832SChris Mason btrfs_super_chunk_root(disk_super), 245584234f3aSYan Zheng blocksize, generation); 245679787eaaSJeff Mahoney BUG_ON(!chunk_root->node); /* -ENOMEM */ 245783121942SDavid Woodhouse if (!test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { 245883121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n", 245983121942SDavid Woodhouse sb->s_id); 2460af31f5e5SChris Mason goto fail_tree_roots; 246183121942SDavid Woodhouse } 24625d4f98a2SYan Zheng btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); 24635d4f98a2SYan Zheng chunk_root->commit_root = btrfs_root_node(chunk_root); 24640b86a832SChris Mason 2465e17cade2SChris Mason read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, 2466e17cade2SChris Mason (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node), 2467e17cade2SChris Mason BTRFS_UUID_SIZE); 2468e17cade2SChris Mason 24690b86a832SChris Mason ret = btrfs_read_chunk_tree(chunk_root); 24702b82032cSYan Zheng if (ret) { 2471d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read chunk tree on %s\n", 2472d397712bSChris Mason sb->s_id); 2473af31f5e5SChris Mason goto fail_tree_roots; 24742b82032cSYan Zheng } 24750b86a832SChris Mason 24768dabb742SStefan Behrens /* 24778dabb742SStefan Behrens * keep the device that is marked to be the target device for the 24788dabb742SStefan Behrens * dev_replace procedure 24798dabb742SStefan Behrens */ 24808dabb742SStefan Behrens btrfs_close_extra_devices(fs_info, fs_devices, 0); 2481dfe25020SChris Mason 2482a6b0d5c8SChris Mason if (!fs_devices->latest_bdev) { 2483a6b0d5c8SChris Mason printk(KERN_CRIT "btrfs: failed to read devices on %s\n", 2484a6b0d5c8SChris Mason sb->s_id); 2485a6b0d5c8SChris Mason goto fail_tree_roots; 2486a6b0d5c8SChris Mason } 2487a6b0d5c8SChris Mason 2488af31f5e5SChris Mason retry_root_backup: 2489db94535dSChris Mason blocksize = btrfs_level_size(tree_root, 2490db94535dSChris Mason btrfs_super_root_level(disk_super)); 249184234f3aSYan Zheng generation = btrfs_super_generation(disk_super); 24920b86a832SChris Mason 2493e20d96d6SChris Mason tree_root->node = read_tree_block(tree_root, 2494db94535dSChris Mason btrfs_super_root(disk_super), 249584234f3aSYan Zheng blocksize, generation); 2496af31f5e5SChris Mason if (!tree_root->node || 2497af31f5e5SChris Mason !test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) { 249883121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read tree root on %s\n", 249983121942SDavid Woodhouse sb->s_id); 2500af31f5e5SChris Mason 2501af31f5e5SChris Mason goto recovery_tree_root; 250283121942SDavid Woodhouse } 2503af31f5e5SChris Mason 25045d4f98a2SYan Zheng btrfs_set_root_node(&tree_root->root_item, tree_root->node); 25055d4f98a2SYan Zheng tree_root->commit_root = btrfs_root_node(tree_root); 2506db94535dSChris Mason 2507db94535dSChris Mason ret = find_and_setup_root(tree_root, fs_info, 2508e20d96d6SChris Mason BTRFS_EXTENT_TREE_OBJECTID, extent_root); 25090b86a832SChris Mason if (ret) 2510af31f5e5SChris Mason goto recovery_tree_root; 25110b86a832SChris Mason extent_root->track_dirty = 1; 25120b86a832SChris Mason 25130b86a832SChris Mason ret = find_and_setup_root(tree_root, fs_info, 25140b86a832SChris Mason BTRFS_DEV_TREE_OBJECTID, dev_root); 25150b86a832SChris Mason if (ret) 2516af31f5e5SChris Mason goto recovery_tree_root; 25175d4f98a2SYan Zheng dev_root->track_dirty = 1; 25183768f368SChris Mason 2519d20f7043SChris Mason ret = find_and_setup_root(tree_root, fs_info, 2520d20f7043SChris Mason BTRFS_CSUM_TREE_OBJECTID, csum_root); 2521d20f7043SChris Mason if (ret) 2522af31f5e5SChris Mason goto recovery_tree_root; 2523d20f7043SChris Mason csum_root->track_dirty = 1; 2524d20f7043SChris Mason 2525bcef60f2SArne Jansen ret = find_and_setup_root(tree_root, fs_info, 2526bcef60f2SArne Jansen BTRFS_QUOTA_TREE_OBJECTID, quota_root); 2527bcef60f2SArne Jansen if (ret) { 2528bcef60f2SArne Jansen kfree(quota_root); 2529bcef60f2SArne Jansen quota_root = fs_info->quota_root = NULL; 2530bcef60f2SArne Jansen } else { 2531bcef60f2SArne Jansen quota_root->track_dirty = 1; 2532bcef60f2SArne Jansen fs_info->quota_enabled = 1; 2533bcef60f2SArne Jansen fs_info->pending_quota_state = 1; 2534bcef60f2SArne Jansen } 2535bcef60f2SArne Jansen 25368929ecfaSYan, Zheng fs_info->generation = generation; 25378929ecfaSYan, Zheng fs_info->last_trans_committed = generation; 25388929ecfaSYan, Zheng 253968310a5eSIlya Dryomov ret = btrfs_recover_balance(fs_info); 254068310a5eSIlya Dryomov if (ret) { 254168310a5eSIlya Dryomov printk(KERN_WARNING "btrfs: failed to recover balance\n"); 254268310a5eSIlya Dryomov goto fail_block_groups; 254368310a5eSIlya Dryomov } 254468310a5eSIlya Dryomov 2545733f4fbbSStefan Behrens ret = btrfs_init_dev_stats(fs_info); 2546733f4fbbSStefan Behrens if (ret) { 2547733f4fbbSStefan Behrens printk(KERN_ERR "btrfs: failed to init dev_stats: %d\n", 2548733f4fbbSStefan Behrens ret); 2549733f4fbbSStefan Behrens goto fail_block_groups; 2550733f4fbbSStefan Behrens } 2551733f4fbbSStefan Behrens 25528dabb742SStefan Behrens ret = btrfs_init_dev_replace(fs_info); 25538dabb742SStefan Behrens if (ret) { 25548dabb742SStefan Behrens pr_err("btrfs: failed to init dev_replace: %d\n", ret); 25558dabb742SStefan Behrens goto fail_block_groups; 25568dabb742SStefan Behrens } 25578dabb742SStefan Behrens 25588dabb742SStefan Behrens btrfs_close_extra_devices(fs_info, fs_devices, 1); 25598dabb742SStefan Behrens 2560c59021f8Sliubo ret = btrfs_init_space_info(fs_info); 2561c59021f8Sliubo if (ret) { 2562c59021f8Sliubo printk(KERN_ERR "Failed to initial space info: %d\n", ret); 2563c59021f8Sliubo goto fail_block_groups; 2564c59021f8Sliubo } 2565c59021f8Sliubo 25661b1d1f66SJosef Bacik ret = btrfs_read_block_groups(extent_root); 25671b1d1f66SJosef Bacik if (ret) { 25681b1d1f66SJosef Bacik printk(KERN_ERR "Failed to read block groups: %d\n", ret); 25691b1d1f66SJosef Bacik goto fail_block_groups; 25701b1d1f66SJosef Bacik } 25715af3e8ccSStefan Behrens fs_info->num_tolerated_disk_barrier_failures = 25725af3e8ccSStefan Behrens btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); 2573292fd7fcSStefan Behrens if (fs_info->fs_devices->missing_devices > 2574292fd7fcSStefan Behrens fs_info->num_tolerated_disk_barrier_failures && 2575292fd7fcSStefan Behrens !(sb->s_flags & MS_RDONLY)) { 2576292fd7fcSStefan Behrens printk(KERN_WARNING 2577292fd7fcSStefan Behrens "Btrfs: too many missing devices, writeable mount is not allowed\n"); 2578292fd7fcSStefan Behrens goto fail_block_groups; 2579292fd7fcSStefan Behrens } 25809078a3e1SChris Mason 2581a74a4b97SChris Mason fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 2582a74a4b97SChris Mason "btrfs-cleaner"); 258357506d50SQinghuang Feng if (IS_ERR(fs_info->cleaner_kthread)) 25841b1d1f66SJosef Bacik goto fail_block_groups; 2585a74a4b97SChris Mason 2586a74a4b97SChris Mason fs_info->transaction_kthread = kthread_run(transaction_kthread, 2587a74a4b97SChris Mason tree_root, 2588a74a4b97SChris Mason "btrfs-transaction"); 258957506d50SQinghuang Feng if (IS_ERR(fs_info->transaction_kthread)) 25903f157a2fSChris Mason goto fail_cleaner; 2591a74a4b97SChris Mason 2592c289811cSChris Mason if (!btrfs_test_opt(tree_root, SSD) && 2593c289811cSChris Mason !btrfs_test_opt(tree_root, NOSSD) && 2594c289811cSChris Mason !fs_info->fs_devices->rotating) { 2595c289811cSChris Mason printk(KERN_INFO "Btrfs detected SSD devices, enabling SSD " 2596c289811cSChris Mason "mode\n"); 2597c289811cSChris Mason btrfs_set_opt(fs_info->mount_opt, SSD); 2598c289811cSChris Mason } 2599c289811cSChris Mason 260021adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 260121adbd5cSStefan Behrens if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { 260221adbd5cSStefan Behrens ret = btrfsic_mount(tree_root, fs_devices, 260321adbd5cSStefan Behrens btrfs_test_opt(tree_root, 260421adbd5cSStefan Behrens CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? 260521adbd5cSStefan Behrens 1 : 0, 260621adbd5cSStefan Behrens fs_info->check_integrity_print_mask); 260721adbd5cSStefan Behrens if (ret) 260821adbd5cSStefan Behrens printk(KERN_WARNING "btrfs: failed to initialize" 260921adbd5cSStefan Behrens " integrity check module %s\n", sb->s_id); 261021adbd5cSStefan Behrens } 261121adbd5cSStefan Behrens #endif 2612bcef60f2SArne Jansen ret = btrfs_read_qgroup_config(fs_info); 2613bcef60f2SArne Jansen if (ret) 2614bcef60f2SArne Jansen goto fail_trans_kthread; 261521adbd5cSStefan Behrens 2616acce952bSliubo /* do not make disk changes in broken FS */ 261768ce9682SStefan Behrens if (btrfs_super_log_root(disk_super) != 0) { 2618e02119d5SChris Mason u64 bytenr = btrfs_super_log_root(disk_super); 2619d18a2c44SChris Mason 26207c2ca468SChris Mason if (fs_devices->rw_devices == 0) { 2621d397712bSChris Mason printk(KERN_WARNING "Btrfs log replay required " 2622d397712bSChris Mason "on RO media\n"); 26237c2ca468SChris Mason err = -EIO; 2624bcef60f2SArne Jansen goto fail_qgroup; 26257c2ca468SChris Mason } 2626e02119d5SChris Mason blocksize = 2627e02119d5SChris Mason btrfs_level_size(tree_root, 2628e02119d5SChris Mason btrfs_super_log_root_level(disk_super)); 2629e02119d5SChris Mason 26306f07e42eSAl Viro log_tree_root = btrfs_alloc_root(fs_info); 2631676e4c86SDan Carpenter if (!log_tree_root) { 2632676e4c86SDan Carpenter err = -ENOMEM; 2633bcef60f2SArne Jansen goto fail_qgroup; 2634676e4c86SDan Carpenter } 2635e02119d5SChris Mason 2636e02119d5SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 2637e02119d5SChris Mason log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); 2638e02119d5SChris Mason 2639e02119d5SChris Mason log_tree_root->node = read_tree_block(tree_root, bytenr, 264084234f3aSYan Zheng blocksize, 264184234f3aSYan Zheng generation + 1); 264279787eaaSJeff Mahoney /* returns with log_tree_root freed on success */ 2643e02119d5SChris Mason ret = btrfs_recover_log_trees(log_tree_root); 264479787eaaSJeff Mahoney if (ret) { 264579787eaaSJeff Mahoney btrfs_error(tree_root->fs_info, ret, 264679787eaaSJeff Mahoney "Failed to recover log tree"); 264779787eaaSJeff Mahoney free_extent_buffer(log_tree_root->node); 264879787eaaSJeff Mahoney kfree(log_tree_root); 264979787eaaSJeff Mahoney goto fail_trans_kthread; 265079787eaaSJeff Mahoney } 2651e556ce2cSYan Zheng 2652e556ce2cSYan Zheng if (sb->s_flags & MS_RDONLY) { 2653e556ce2cSYan Zheng ret = btrfs_commit_super(tree_root); 265479787eaaSJeff Mahoney if (ret) 265579787eaaSJeff Mahoney goto fail_trans_kthread; 2656e556ce2cSYan Zheng } 2657e02119d5SChris Mason } 26581a40e23bSZheng Yan 265976dda93cSYan, Zheng ret = btrfs_find_orphan_roots(tree_root); 266079787eaaSJeff Mahoney if (ret) 266179787eaaSJeff Mahoney goto fail_trans_kthread; 266276dda93cSYan, Zheng 26637c2ca468SChris Mason if (!(sb->s_flags & MS_RDONLY)) { 2664d68fc57bSYan, Zheng ret = btrfs_cleanup_fs_roots(fs_info); 266544c44af2SIlya Dryomov if (ret) 266644c44af2SIlya Dryomov goto fail_trans_kthread; 2667d68fc57bSYan, Zheng 26685d4f98a2SYan Zheng ret = btrfs_recover_relocation(tree_root); 2669d7ce5843SMiao Xie if (ret < 0) { 2670d7ce5843SMiao Xie printk(KERN_WARNING 2671d7ce5843SMiao Xie "btrfs: failed to recover relocation\n"); 2672d7ce5843SMiao Xie err = -EINVAL; 2673bcef60f2SArne Jansen goto fail_qgroup; 2674d7ce5843SMiao Xie } 26757c2ca468SChris Mason } 26761a40e23bSZheng Yan 26773de4586cSChris Mason location.objectid = BTRFS_FS_TREE_OBJECTID; 26783de4586cSChris Mason location.type = BTRFS_ROOT_ITEM_KEY; 26793de4586cSChris Mason location.offset = (u64)-1; 26803de4586cSChris Mason 26813de4586cSChris Mason fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); 26823de4586cSChris Mason if (!fs_info->fs_root) 2683bcef60f2SArne Jansen goto fail_qgroup; 26843140c9a3SDan Carpenter if (IS_ERR(fs_info->fs_root)) { 26853140c9a3SDan Carpenter err = PTR_ERR(fs_info->fs_root); 2686bcef60f2SArne Jansen goto fail_qgroup; 26873140c9a3SDan Carpenter } 2688c289811cSChris Mason 26892b6ba629SIlya Dryomov if (sb->s_flags & MS_RDONLY) 26902b6ba629SIlya Dryomov return 0; 26912b6ba629SIlya Dryomov 2692e3acc2a6SJosef Bacik down_read(&fs_info->cleanup_work_sem); 26932b6ba629SIlya Dryomov if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || 26942b6ba629SIlya Dryomov (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { 26952b6ba629SIlya Dryomov up_read(&fs_info->cleanup_work_sem); 26962b6ba629SIlya Dryomov close_ctree(tree_root); 26972b6ba629SIlya Dryomov return ret; 26982b6ba629SIlya Dryomov } 2699e3acc2a6SJosef Bacik up_read(&fs_info->cleanup_work_sem); 270059641015SIlya Dryomov 27012b6ba629SIlya Dryomov ret = btrfs_resume_balance_async(fs_info); 27022b6ba629SIlya Dryomov if (ret) { 27032b6ba629SIlya Dryomov printk(KERN_WARNING "btrfs: failed to resume balance\n"); 270466b4ffd1SJosef Bacik close_ctree(tree_root); 27052b6ba629SIlya Dryomov return ret; 2706e3acc2a6SJosef Bacik } 2707e3acc2a6SJosef Bacik 27088dabb742SStefan Behrens ret = btrfs_resume_dev_replace_async(fs_info); 27098dabb742SStefan Behrens if (ret) { 27108dabb742SStefan Behrens pr_warn("btrfs: failed to resume dev_replace\n"); 27118dabb742SStefan Behrens close_ctree(tree_root); 27128dabb742SStefan Behrens return ret; 27138dabb742SStefan Behrens } 27148dabb742SStefan Behrens 2715ad2b2c80SAl Viro return 0; 271639279cc3SChris Mason 2717bcef60f2SArne Jansen fail_qgroup: 2718bcef60f2SArne Jansen btrfs_free_qgroup_config(fs_info); 27197c2ca468SChris Mason fail_trans_kthread: 27207c2ca468SChris Mason kthread_stop(fs_info->transaction_kthread); 27213f157a2fSChris Mason fail_cleaner: 2722a74a4b97SChris Mason kthread_stop(fs_info->cleaner_kthread); 27237c2ca468SChris Mason 27247c2ca468SChris Mason /* 27257c2ca468SChris Mason * make sure we're done with the btree inode before we stop our 27267c2ca468SChris Mason * kthreads 27277c2ca468SChris Mason */ 27287c2ca468SChris Mason filemap_write_and_wait(fs_info->btree_inode->i_mapping); 27297c2ca468SChris Mason invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 27307c2ca468SChris Mason 27311b1d1f66SJosef Bacik fail_block_groups: 27321b1d1f66SJosef Bacik btrfs_free_block_groups(fs_info); 2733af31f5e5SChris Mason 2734af31f5e5SChris Mason fail_tree_roots: 2735af31f5e5SChris Mason free_root_pointers(fs_info, 1); 2736af31f5e5SChris Mason 273739279cc3SChris Mason fail_sb_buffer: 273861d92c32SChris Mason btrfs_stop_workers(&fs_info->generic_worker); 2739306c8b68SChris Mason btrfs_stop_workers(&fs_info->readahead_workers); 2740247e743cSChris Mason btrfs_stop_workers(&fs_info->fixup_workers); 2741771ed689SChris Mason btrfs_stop_workers(&fs_info->delalloc_workers); 27428b712842SChris Mason btrfs_stop_workers(&fs_info->workers); 27438b712842SChris Mason btrfs_stop_workers(&fs_info->endio_workers); 2744d20f7043SChris Mason btrfs_stop_workers(&fs_info->endio_meta_workers); 274553b381b3SDavid Woodhouse btrfs_stop_workers(&fs_info->endio_raid56_workers); 274653b381b3SDavid Woodhouse btrfs_stop_workers(&fs_info->rmw_workers); 2747cad321adSChris Mason btrfs_stop_workers(&fs_info->endio_meta_write_workers); 2748e6dcd2dcSChris Mason btrfs_stop_workers(&fs_info->endio_write_workers); 27490cb59c99SJosef Bacik btrfs_stop_workers(&fs_info->endio_freespace_worker); 27501cc127b5SChris Mason btrfs_stop_workers(&fs_info->submit_workers); 275116cdcec7SMiao Xie btrfs_stop_workers(&fs_info->delayed_workers); 2752bab39bf9SJosef Bacik btrfs_stop_workers(&fs_info->caching_workers); 27538ccf6f19SMiao Xie btrfs_stop_workers(&fs_info->flush_workers); 275416cdcec7SMiao Xie fail_alloc: 27554543df7eSChris Mason fail_iput: 2756586e46e2SIlya Dryomov btrfs_mapping_tree_free(&fs_info->mapping_tree); 2757586e46e2SIlya Dryomov 27587c2ca468SChris Mason invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 27594543df7eSChris Mason iput(fs_info->btree_inode); 2760ad081f14SJens Axboe fail_bdi: 27617e662854SQinghuang Feng bdi_destroy(&fs_info->bdi); 276276dda93cSYan, Zheng fail_srcu: 276376dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 27647e662854SQinghuang Feng fail: 276553b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 2766586e46e2SIlya Dryomov btrfs_close_devices(fs_info->fs_devices); 2767ad2b2c80SAl Viro return err; 2768af31f5e5SChris Mason 2769af31f5e5SChris Mason recovery_tree_root: 2770af31f5e5SChris Mason if (!btrfs_test_opt(tree_root, RECOVERY)) 2771af31f5e5SChris Mason goto fail_tree_roots; 2772af31f5e5SChris Mason 2773af31f5e5SChris Mason free_root_pointers(fs_info, 0); 2774af31f5e5SChris Mason 2775af31f5e5SChris Mason /* don't use the log in recovery mode, it won't be valid */ 2776af31f5e5SChris Mason btrfs_set_super_log_root(disk_super, 0); 2777af31f5e5SChris Mason 2778af31f5e5SChris Mason /* we can't trust the free space cache either */ 2779af31f5e5SChris Mason btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); 2780af31f5e5SChris Mason 2781af31f5e5SChris Mason ret = next_root_backup(fs_info, fs_info->super_copy, 2782af31f5e5SChris Mason &num_backups_tried, &backup_index); 2783af31f5e5SChris Mason if (ret == -1) 2784af31f5e5SChris Mason goto fail_block_groups; 2785af31f5e5SChris Mason goto retry_root_backup; 2786eb60ceacSChris Mason } 2787eb60ceacSChris Mason 2788f2984462SChris Mason static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) 2789f2984462SChris Mason { 2790f2984462SChris Mason if (uptodate) { 2791f2984462SChris Mason set_buffer_uptodate(bh); 2792f2984462SChris Mason } else { 2793442a4f63SStefan Behrens struct btrfs_device *device = (struct btrfs_device *) 2794442a4f63SStefan Behrens bh->b_private; 2795442a4f63SStefan Behrens 2796606686eeSJosef Bacik printk_ratelimited_in_rcu(KERN_WARNING "lost page write due to " 2797606686eeSJosef Bacik "I/O error on %s\n", 2798606686eeSJosef Bacik rcu_str_deref(device->name)); 27991259ab75SChris Mason /* note, we dont' set_buffer_write_io_error because we have 28001259ab75SChris Mason * our own ways of dealing with the IO errors 28011259ab75SChris Mason */ 2802f2984462SChris Mason clear_buffer_uptodate(bh); 2803442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); 2804f2984462SChris Mason } 2805f2984462SChris Mason unlock_buffer(bh); 2806f2984462SChris Mason put_bh(bh); 2807f2984462SChris Mason } 2808f2984462SChris Mason 2809a512bbf8SYan Zheng struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) 2810a512bbf8SYan Zheng { 2811a512bbf8SYan Zheng struct buffer_head *bh; 2812a512bbf8SYan Zheng struct buffer_head *latest = NULL; 2813a512bbf8SYan Zheng struct btrfs_super_block *super; 2814a512bbf8SYan Zheng int i; 2815a512bbf8SYan Zheng u64 transid = 0; 2816a512bbf8SYan Zheng u64 bytenr; 2817a512bbf8SYan Zheng 2818a512bbf8SYan Zheng /* we would like to check all the supers, but that would make 2819a512bbf8SYan Zheng * a btrfs mount succeed after a mkfs from a different FS. 2820a512bbf8SYan Zheng * So, we need to add a special mount option to scan for 2821a512bbf8SYan Zheng * later supers, using BTRFS_SUPER_MIRROR_MAX instead 2822a512bbf8SYan Zheng */ 2823a512bbf8SYan Zheng for (i = 0; i < 1; i++) { 2824a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 2825a512bbf8SYan Zheng if (bytenr + 4096 >= i_size_read(bdev->bd_inode)) 2826a512bbf8SYan Zheng break; 2827a512bbf8SYan Zheng bh = __bread(bdev, bytenr / 4096, 4096); 2828a512bbf8SYan Zheng if (!bh) 2829a512bbf8SYan Zheng continue; 2830a512bbf8SYan Zheng 2831a512bbf8SYan Zheng super = (struct btrfs_super_block *)bh->b_data; 2832a512bbf8SYan Zheng if (btrfs_super_bytenr(super) != bytenr || 2833a512bbf8SYan Zheng strncmp((char *)(&super->magic), BTRFS_MAGIC, 2834a512bbf8SYan Zheng sizeof(super->magic))) { 2835a512bbf8SYan Zheng brelse(bh); 2836a512bbf8SYan Zheng continue; 2837a512bbf8SYan Zheng } 2838a512bbf8SYan Zheng 2839a512bbf8SYan Zheng if (!latest || btrfs_super_generation(super) > transid) { 2840a512bbf8SYan Zheng brelse(latest); 2841a512bbf8SYan Zheng latest = bh; 2842a512bbf8SYan Zheng transid = btrfs_super_generation(super); 2843a512bbf8SYan Zheng } else { 2844a512bbf8SYan Zheng brelse(bh); 2845a512bbf8SYan Zheng } 2846a512bbf8SYan Zheng } 2847a512bbf8SYan Zheng return latest; 2848a512bbf8SYan Zheng } 2849a512bbf8SYan Zheng 28504eedeb75SHisashi Hifumi /* 28514eedeb75SHisashi Hifumi * this should be called twice, once with wait == 0 and 28524eedeb75SHisashi Hifumi * once with wait == 1. When wait == 0 is done, all the buffer heads 28534eedeb75SHisashi Hifumi * we write are pinned. 28544eedeb75SHisashi Hifumi * 28554eedeb75SHisashi Hifumi * They are released when wait == 1 is done. 28564eedeb75SHisashi Hifumi * max_mirrors must be the same for both runs, and it indicates how 28574eedeb75SHisashi Hifumi * many supers on this one device should be written. 28584eedeb75SHisashi Hifumi * 28594eedeb75SHisashi Hifumi * max_mirrors == 0 means to write them all. 28604eedeb75SHisashi Hifumi */ 2861a512bbf8SYan Zheng static int write_dev_supers(struct btrfs_device *device, 2862a512bbf8SYan Zheng struct btrfs_super_block *sb, 2863a512bbf8SYan Zheng int do_barriers, int wait, int max_mirrors) 2864a512bbf8SYan Zheng { 2865a512bbf8SYan Zheng struct buffer_head *bh; 2866a512bbf8SYan Zheng int i; 2867a512bbf8SYan Zheng int ret; 2868a512bbf8SYan Zheng int errors = 0; 2869a512bbf8SYan Zheng u32 crc; 2870a512bbf8SYan Zheng u64 bytenr; 2871a512bbf8SYan Zheng 2872a512bbf8SYan Zheng if (max_mirrors == 0) 2873a512bbf8SYan Zheng max_mirrors = BTRFS_SUPER_MIRROR_MAX; 2874a512bbf8SYan Zheng 2875a512bbf8SYan Zheng for (i = 0; i < max_mirrors; i++) { 2876a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 2877a512bbf8SYan Zheng if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes) 2878a512bbf8SYan Zheng break; 2879a512bbf8SYan Zheng 2880a512bbf8SYan Zheng if (wait) { 2881a512bbf8SYan Zheng bh = __find_get_block(device->bdev, bytenr / 4096, 2882a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 2883a512bbf8SYan Zheng BUG_ON(!bh); 2884a512bbf8SYan Zheng wait_on_buffer(bh); 28854eedeb75SHisashi Hifumi if (!buffer_uptodate(bh)) 28864eedeb75SHisashi Hifumi errors++; 28874eedeb75SHisashi Hifumi 28884eedeb75SHisashi Hifumi /* drop our reference */ 28894eedeb75SHisashi Hifumi brelse(bh); 28904eedeb75SHisashi Hifumi 28914eedeb75SHisashi Hifumi /* drop the reference from the wait == 0 run */ 2892a512bbf8SYan Zheng brelse(bh); 2893a512bbf8SYan Zheng continue; 2894a512bbf8SYan Zheng } else { 2895a512bbf8SYan Zheng btrfs_set_super_bytenr(sb, bytenr); 2896a512bbf8SYan Zheng 2897a512bbf8SYan Zheng crc = ~(u32)0; 2898a512bbf8SYan Zheng crc = btrfs_csum_data(NULL, (char *)sb + 2899a512bbf8SYan Zheng BTRFS_CSUM_SIZE, crc, 2900a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE - 2901a512bbf8SYan Zheng BTRFS_CSUM_SIZE); 2902a512bbf8SYan Zheng btrfs_csum_final(crc, sb->csum); 2903a512bbf8SYan Zheng 29044eedeb75SHisashi Hifumi /* 29054eedeb75SHisashi Hifumi * one reference for us, and we leave it for the 29064eedeb75SHisashi Hifumi * caller 29074eedeb75SHisashi Hifumi */ 2908a512bbf8SYan Zheng bh = __getblk(device->bdev, bytenr / 4096, 2909a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 2910a512bbf8SYan Zheng memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); 2911a512bbf8SYan Zheng 29124eedeb75SHisashi Hifumi /* one reference for submit_bh */ 2913a512bbf8SYan Zheng get_bh(bh); 29144eedeb75SHisashi Hifumi 29154eedeb75SHisashi Hifumi set_buffer_uptodate(bh); 2916a512bbf8SYan Zheng lock_buffer(bh); 2917a512bbf8SYan Zheng bh->b_end_io = btrfs_end_buffer_write_sync; 2918442a4f63SStefan Behrens bh->b_private = device; 2919a512bbf8SYan Zheng } 2920a512bbf8SYan Zheng 2921387125fcSChris Mason /* 2922387125fcSChris Mason * we fua the first super. The others we allow 2923387125fcSChris Mason * to go down lazy. 2924387125fcSChris Mason */ 292521adbd5cSStefan Behrens ret = btrfsic_submit_bh(WRITE_FUA, bh); 29264eedeb75SHisashi Hifumi if (ret) 2927a512bbf8SYan Zheng errors++; 2928a512bbf8SYan Zheng } 2929a512bbf8SYan Zheng return errors < i ? 0 : -1; 2930a512bbf8SYan Zheng } 2931a512bbf8SYan Zheng 2932387125fcSChris Mason /* 2933387125fcSChris Mason * endio for the write_dev_flush, this will wake anyone waiting 2934387125fcSChris Mason * for the barrier when it is done 2935387125fcSChris Mason */ 2936387125fcSChris Mason static void btrfs_end_empty_barrier(struct bio *bio, int err) 2937387125fcSChris Mason { 2938387125fcSChris Mason if (err) { 2939387125fcSChris Mason if (err == -EOPNOTSUPP) 2940387125fcSChris Mason set_bit(BIO_EOPNOTSUPP, &bio->bi_flags); 2941387125fcSChris Mason clear_bit(BIO_UPTODATE, &bio->bi_flags); 2942387125fcSChris Mason } 2943387125fcSChris Mason if (bio->bi_private) 2944387125fcSChris Mason complete(bio->bi_private); 2945387125fcSChris Mason bio_put(bio); 2946387125fcSChris Mason } 2947387125fcSChris Mason 2948387125fcSChris Mason /* 2949387125fcSChris Mason * trigger flushes for one the devices. If you pass wait == 0, the flushes are 2950387125fcSChris Mason * sent down. With wait == 1, it waits for the previous flush. 2951387125fcSChris Mason * 2952387125fcSChris Mason * any device where the flush fails with eopnotsupp are flagged as not-barrier 2953387125fcSChris Mason * capable 2954387125fcSChris Mason */ 2955387125fcSChris Mason static int write_dev_flush(struct btrfs_device *device, int wait) 2956387125fcSChris Mason { 2957387125fcSChris Mason struct bio *bio; 2958387125fcSChris Mason int ret = 0; 2959387125fcSChris Mason 2960387125fcSChris Mason if (device->nobarriers) 2961387125fcSChris Mason return 0; 2962387125fcSChris Mason 2963387125fcSChris Mason if (wait) { 2964387125fcSChris Mason bio = device->flush_bio; 2965387125fcSChris Mason if (!bio) 2966387125fcSChris Mason return 0; 2967387125fcSChris Mason 2968387125fcSChris Mason wait_for_completion(&device->flush_wait); 2969387125fcSChris Mason 2970387125fcSChris Mason if (bio_flagged(bio, BIO_EOPNOTSUPP)) { 2971606686eeSJosef Bacik printk_in_rcu("btrfs: disabling barriers on dev %s\n", 2972606686eeSJosef Bacik rcu_str_deref(device->name)); 2973387125fcSChris Mason device->nobarriers = 1; 29745af3e8ccSStefan Behrens } else if (!bio_flagged(bio, BIO_UPTODATE)) { 2975387125fcSChris Mason ret = -EIO; 2976442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, 2977442a4f63SStefan Behrens BTRFS_DEV_STAT_FLUSH_ERRS); 2978387125fcSChris Mason } 2979387125fcSChris Mason 2980387125fcSChris Mason /* drop the reference from the wait == 0 run */ 2981387125fcSChris Mason bio_put(bio); 2982387125fcSChris Mason device->flush_bio = NULL; 2983387125fcSChris Mason 2984387125fcSChris Mason return ret; 2985387125fcSChris Mason } 2986387125fcSChris Mason 2987387125fcSChris Mason /* 2988387125fcSChris Mason * one reference for us, and we leave it for the 2989387125fcSChris Mason * caller 2990387125fcSChris Mason */ 29919c017abcSJesper Juhl device->flush_bio = NULL; 2992387125fcSChris Mason bio = bio_alloc(GFP_NOFS, 0); 2993387125fcSChris Mason if (!bio) 2994387125fcSChris Mason return -ENOMEM; 2995387125fcSChris Mason 2996387125fcSChris Mason bio->bi_end_io = btrfs_end_empty_barrier; 2997387125fcSChris Mason bio->bi_bdev = device->bdev; 2998387125fcSChris Mason init_completion(&device->flush_wait); 2999387125fcSChris Mason bio->bi_private = &device->flush_wait; 3000387125fcSChris Mason device->flush_bio = bio; 3001387125fcSChris Mason 3002387125fcSChris Mason bio_get(bio); 300321adbd5cSStefan Behrens btrfsic_submit_bio(WRITE_FLUSH, bio); 3004387125fcSChris Mason 3005387125fcSChris Mason return 0; 3006387125fcSChris Mason } 3007387125fcSChris Mason 3008387125fcSChris Mason /* 3009387125fcSChris Mason * send an empty flush down to each device in parallel, 3010387125fcSChris Mason * then wait for them 3011387125fcSChris Mason */ 3012387125fcSChris Mason static int barrier_all_devices(struct btrfs_fs_info *info) 3013387125fcSChris Mason { 3014387125fcSChris Mason struct list_head *head; 3015387125fcSChris Mason struct btrfs_device *dev; 30165af3e8ccSStefan Behrens int errors_send = 0; 30175af3e8ccSStefan Behrens int errors_wait = 0; 3018387125fcSChris Mason int ret; 3019387125fcSChris Mason 3020387125fcSChris Mason /* send down all the barriers */ 3021387125fcSChris Mason head = &info->fs_devices->devices; 3022387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3023387125fcSChris Mason if (!dev->bdev) { 30245af3e8ccSStefan Behrens errors_send++; 3025387125fcSChris Mason continue; 3026387125fcSChris Mason } 3027387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3028387125fcSChris Mason continue; 3029387125fcSChris Mason 3030387125fcSChris Mason ret = write_dev_flush(dev, 0); 3031387125fcSChris Mason if (ret) 30325af3e8ccSStefan Behrens errors_send++; 3033387125fcSChris Mason } 3034387125fcSChris Mason 3035387125fcSChris Mason /* wait for all the barriers */ 3036387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3037387125fcSChris Mason if (!dev->bdev) { 30385af3e8ccSStefan Behrens errors_wait++; 3039387125fcSChris Mason continue; 3040387125fcSChris Mason } 3041387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3042387125fcSChris Mason continue; 3043387125fcSChris Mason 3044387125fcSChris Mason ret = write_dev_flush(dev, 1); 3045387125fcSChris Mason if (ret) 30465af3e8ccSStefan Behrens errors_wait++; 3047387125fcSChris Mason } 30485af3e8ccSStefan Behrens if (errors_send > info->num_tolerated_disk_barrier_failures || 30495af3e8ccSStefan Behrens errors_wait > info->num_tolerated_disk_barrier_failures) 3050387125fcSChris Mason return -EIO; 3051387125fcSChris Mason return 0; 3052387125fcSChris Mason } 3053387125fcSChris Mason 30545af3e8ccSStefan Behrens int btrfs_calc_num_tolerated_disk_barrier_failures( 30555af3e8ccSStefan Behrens struct btrfs_fs_info *fs_info) 30565af3e8ccSStefan Behrens { 30575af3e8ccSStefan Behrens struct btrfs_ioctl_space_info space; 30585af3e8ccSStefan Behrens struct btrfs_space_info *sinfo; 30595af3e8ccSStefan Behrens u64 types[] = {BTRFS_BLOCK_GROUP_DATA, 30605af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_SYSTEM, 30615af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_METADATA, 30625af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; 30635af3e8ccSStefan Behrens int num_types = 4; 30645af3e8ccSStefan Behrens int i; 30655af3e8ccSStefan Behrens int c; 30665af3e8ccSStefan Behrens int num_tolerated_disk_barrier_failures = 30675af3e8ccSStefan Behrens (int)fs_info->fs_devices->num_devices; 30685af3e8ccSStefan Behrens 30695af3e8ccSStefan Behrens for (i = 0; i < num_types; i++) { 30705af3e8ccSStefan Behrens struct btrfs_space_info *tmp; 30715af3e8ccSStefan Behrens 30725af3e8ccSStefan Behrens sinfo = NULL; 30735af3e8ccSStefan Behrens rcu_read_lock(); 30745af3e8ccSStefan Behrens list_for_each_entry_rcu(tmp, &fs_info->space_info, list) { 30755af3e8ccSStefan Behrens if (tmp->flags == types[i]) { 30765af3e8ccSStefan Behrens sinfo = tmp; 30775af3e8ccSStefan Behrens break; 30785af3e8ccSStefan Behrens } 30795af3e8ccSStefan Behrens } 30805af3e8ccSStefan Behrens rcu_read_unlock(); 30815af3e8ccSStefan Behrens 30825af3e8ccSStefan Behrens if (!sinfo) 30835af3e8ccSStefan Behrens continue; 30845af3e8ccSStefan Behrens 30855af3e8ccSStefan Behrens down_read(&sinfo->groups_sem); 30865af3e8ccSStefan Behrens for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { 30875af3e8ccSStefan Behrens if (!list_empty(&sinfo->block_groups[c])) { 30885af3e8ccSStefan Behrens u64 flags; 30895af3e8ccSStefan Behrens 30905af3e8ccSStefan Behrens btrfs_get_block_group_info( 30915af3e8ccSStefan Behrens &sinfo->block_groups[c], &space); 30925af3e8ccSStefan Behrens if (space.total_bytes == 0 || 30935af3e8ccSStefan Behrens space.used_bytes == 0) 30945af3e8ccSStefan Behrens continue; 30955af3e8ccSStefan Behrens flags = space.flags; 30965af3e8ccSStefan Behrens /* 30975af3e8ccSStefan Behrens * return 30985af3e8ccSStefan Behrens * 0: if dup, single or RAID0 is configured for 30995af3e8ccSStefan Behrens * any of metadata, system or data, else 31005af3e8ccSStefan Behrens * 1: if RAID5 is configured, or if RAID1 or 31015af3e8ccSStefan Behrens * RAID10 is configured and only two mirrors 31025af3e8ccSStefan Behrens * are used, else 31035af3e8ccSStefan Behrens * 2: if RAID6 is configured, else 31045af3e8ccSStefan Behrens * num_mirrors - 1: if RAID1 or RAID10 is 31055af3e8ccSStefan Behrens * configured and more than 31065af3e8ccSStefan Behrens * 2 mirrors are used. 31075af3e8ccSStefan Behrens */ 31085af3e8ccSStefan Behrens if (num_tolerated_disk_barrier_failures > 0 && 31095af3e8ccSStefan Behrens ((flags & (BTRFS_BLOCK_GROUP_DUP | 31105af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_RAID0)) || 31115af3e8ccSStefan Behrens ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) 31125af3e8ccSStefan Behrens == 0))) 31135af3e8ccSStefan Behrens num_tolerated_disk_barrier_failures = 0; 311453b381b3SDavid Woodhouse else if (num_tolerated_disk_barrier_failures > 1) { 311553b381b3SDavid Woodhouse if (flags & (BTRFS_BLOCK_GROUP_RAID1 | 311653b381b3SDavid Woodhouse BTRFS_BLOCK_GROUP_RAID5 | 311753b381b3SDavid Woodhouse BTRFS_BLOCK_GROUP_RAID10)) { 31185af3e8ccSStefan Behrens num_tolerated_disk_barrier_failures = 1; 311953b381b3SDavid Woodhouse } else if (flags & 312053b381b3SDavid Woodhouse BTRFS_BLOCK_GROUP_RAID5) { 312153b381b3SDavid Woodhouse num_tolerated_disk_barrier_failures = 2; 312253b381b3SDavid Woodhouse } 312353b381b3SDavid Woodhouse } 31245af3e8ccSStefan Behrens } 31255af3e8ccSStefan Behrens } 31265af3e8ccSStefan Behrens up_read(&sinfo->groups_sem); 31275af3e8ccSStefan Behrens } 31285af3e8ccSStefan Behrens 31295af3e8ccSStefan Behrens return num_tolerated_disk_barrier_failures; 31305af3e8ccSStefan Behrens } 31315af3e8ccSStefan Behrens 3132a512bbf8SYan Zheng int write_all_supers(struct btrfs_root *root, int max_mirrors) 3133f2984462SChris Mason { 3134e5e9a520SChris Mason struct list_head *head; 3135f2984462SChris Mason struct btrfs_device *dev; 3136a061fc8dSChris Mason struct btrfs_super_block *sb; 3137f2984462SChris Mason struct btrfs_dev_item *dev_item; 3138f2984462SChris Mason int ret; 3139f2984462SChris Mason int do_barriers; 3140a236aed1SChris Mason int max_errors; 3141a236aed1SChris Mason int total_errors = 0; 3142a061fc8dSChris Mason u64 flags; 3143f2984462SChris Mason 31446c41761fSDavid Sterba max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; 3145f2984462SChris Mason do_barriers = !btrfs_test_opt(root, NOBARRIER); 3146af31f5e5SChris Mason backup_super_roots(root->fs_info); 3147f2984462SChris Mason 31486c41761fSDavid Sterba sb = root->fs_info->super_for_commit; 3149a061fc8dSChris Mason dev_item = &sb->dev_item; 3150e5e9a520SChris Mason 3151174ba509SChris Mason mutex_lock(&root->fs_info->fs_devices->device_list_mutex); 3152e5e9a520SChris Mason head = &root->fs_info->fs_devices->devices; 3153387125fcSChris Mason 31545af3e8ccSStefan Behrens if (do_barriers) { 31555af3e8ccSStefan Behrens ret = barrier_all_devices(root->fs_info); 31565af3e8ccSStefan Behrens if (ret) { 31575af3e8ccSStefan Behrens mutex_unlock( 31585af3e8ccSStefan Behrens &root->fs_info->fs_devices->device_list_mutex); 31595af3e8ccSStefan Behrens btrfs_error(root->fs_info, ret, 31605af3e8ccSStefan Behrens "errors while submitting device barriers."); 31615af3e8ccSStefan Behrens return ret; 31625af3e8ccSStefan Behrens } 31635af3e8ccSStefan Behrens } 3164387125fcSChris Mason 31651f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3166dfe25020SChris Mason if (!dev->bdev) { 3167dfe25020SChris Mason total_errors++; 3168dfe25020SChris Mason continue; 3169dfe25020SChris Mason } 31702b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3171dfe25020SChris Mason continue; 3172dfe25020SChris Mason 31732b82032cSYan Zheng btrfs_set_stack_device_generation(dev_item, 0); 3174a061fc8dSChris Mason btrfs_set_stack_device_type(dev_item, dev->type); 3175a061fc8dSChris Mason btrfs_set_stack_device_id(dev_item, dev->devid); 3176a061fc8dSChris Mason btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes); 3177a061fc8dSChris Mason btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used); 3178a061fc8dSChris Mason btrfs_set_stack_device_io_align(dev_item, dev->io_align); 3179a061fc8dSChris Mason btrfs_set_stack_device_io_width(dev_item, dev->io_width); 3180a061fc8dSChris Mason btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); 3181a061fc8dSChris Mason memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); 31822b82032cSYan Zheng memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); 3183a512bbf8SYan Zheng 3184a061fc8dSChris Mason flags = btrfs_super_flags(sb); 3185a061fc8dSChris Mason btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); 3186f2984462SChris Mason 3187a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); 3188a236aed1SChris Mason if (ret) 3189a236aed1SChris Mason total_errors++; 3190f2984462SChris Mason } 3191a236aed1SChris Mason if (total_errors > max_errors) { 3192d397712bSChris Mason printk(KERN_ERR "btrfs: %d errors while writing supers\n", 3193d397712bSChris Mason total_errors); 319479787eaaSJeff Mahoney 319579787eaaSJeff Mahoney /* This shouldn't happen. FUA is masked off if unsupported */ 3196a236aed1SChris Mason BUG(); 3197a236aed1SChris Mason } 3198f2984462SChris Mason 3199a512bbf8SYan Zheng total_errors = 0; 32001f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3201dfe25020SChris Mason if (!dev->bdev) 3202dfe25020SChris Mason continue; 32032b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3204dfe25020SChris Mason continue; 3205dfe25020SChris Mason 3206a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); 3207a512bbf8SYan Zheng if (ret) 32081259ab75SChris Mason total_errors++; 3209f2984462SChris Mason } 3210174ba509SChris Mason mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 3211a236aed1SChris Mason if (total_errors > max_errors) { 321279787eaaSJeff Mahoney btrfs_error(root->fs_info, -EIO, 321379787eaaSJeff Mahoney "%d errors while writing supers", total_errors); 321479787eaaSJeff Mahoney return -EIO; 3215a236aed1SChris Mason } 3216f2984462SChris Mason return 0; 3217f2984462SChris Mason } 3218f2984462SChris Mason 3219a512bbf8SYan Zheng int write_ctree_super(struct btrfs_trans_handle *trans, 3220a512bbf8SYan Zheng struct btrfs_root *root, int max_mirrors) 3221cfaa7295SChris Mason { 3222e66f709bSChris Mason int ret; 32232c90e5d6SChris Mason 3224a512bbf8SYan Zheng ret = write_all_supers(root, max_mirrors); 32255f39d397SChris Mason return ret; 3226cfaa7295SChris Mason } 3227cfaa7295SChris Mason 3228143bede5SJeff Mahoney void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) 32292619ba1fSChris Mason { 32304df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 32312619ba1fSChris Mason radix_tree_delete(&fs_info->fs_roots_radix, 32322619ba1fSChris Mason (unsigned long)root->root_key.objectid); 32334df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 323476dda93cSYan, Zheng 323576dda93cSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) 323676dda93cSYan, Zheng synchronize_srcu(&fs_info->subvol_srcu); 323776dda93cSYan, Zheng 3238581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_pinned); 3239581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_ctl); 32404df27c4dSYan, Zheng free_fs_root(root); 32414df27c4dSYan, Zheng } 32424df27c4dSYan, Zheng 32434df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root) 32444df27c4dSYan, Zheng { 324582d5902dSLi Zefan iput(root->cache_inode); 32464df27c4dSYan, Zheng WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); 32470ee5dc67SAl Viro if (root->anon_dev) 32480ee5dc67SAl Viro free_anon_bdev(root->anon_dev); 32495f39d397SChris Mason free_extent_buffer(root->node); 32505f39d397SChris Mason free_extent_buffer(root->commit_root); 3251581bb050SLi Zefan kfree(root->free_ino_ctl); 3252581bb050SLi Zefan kfree(root->free_ino_pinned); 325358176a96SJosef Bacik kfree(root->name); 32542619ba1fSChris Mason kfree(root); 32552619ba1fSChris Mason } 32562619ba1fSChris Mason 3257143bede5SJeff Mahoney static void del_fs_roots(struct btrfs_fs_info *fs_info) 32580f7d52f4SChris Mason { 32590f7d52f4SChris Mason int ret; 32600f7d52f4SChris Mason struct btrfs_root *gang[8]; 32610f7d52f4SChris Mason int i; 32620f7d52f4SChris Mason 326376dda93cSYan, Zheng while (!list_empty(&fs_info->dead_roots)) { 326476dda93cSYan, Zheng gang[0] = list_entry(fs_info->dead_roots.next, 326576dda93cSYan, Zheng struct btrfs_root, root_list); 326676dda93cSYan, Zheng list_del(&gang[0]->root_list); 326776dda93cSYan, Zheng 326876dda93cSYan, Zheng if (gang[0]->in_radix) { 326976dda93cSYan, Zheng btrfs_free_fs_root(fs_info, gang[0]); 327076dda93cSYan, Zheng } else { 327176dda93cSYan, Zheng free_extent_buffer(gang[0]->node); 327276dda93cSYan, Zheng free_extent_buffer(gang[0]->commit_root); 327376dda93cSYan, Zheng kfree(gang[0]); 327476dda93cSYan, Zheng } 327576dda93cSYan, Zheng } 327676dda93cSYan, Zheng 32770f7d52f4SChris Mason while (1) { 32780f7d52f4SChris Mason ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 32790f7d52f4SChris Mason (void **)gang, 0, 32800f7d52f4SChris Mason ARRAY_SIZE(gang)); 32810f7d52f4SChris Mason if (!ret) 32820f7d52f4SChris Mason break; 32832619ba1fSChris Mason for (i = 0; i < ret; i++) 32845eda7b5eSChris Mason btrfs_free_fs_root(fs_info, gang[i]); 32850f7d52f4SChris Mason } 32860f7d52f4SChris Mason } 3287b4100d64SChris Mason 3288c146afadSYan Zheng int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) 3289c146afadSYan Zheng { 3290c146afadSYan Zheng u64 root_objectid = 0; 3291c146afadSYan Zheng struct btrfs_root *gang[8]; 3292c146afadSYan Zheng int i; 3293c146afadSYan Zheng int ret; 3294c146afadSYan Zheng 3295c146afadSYan Zheng while (1) { 3296c146afadSYan Zheng ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 3297c146afadSYan Zheng (void **)gang, root_objectid, 3298c146afadSYan Zheng ARRAY_SIZE(gang)); 3299c146afadSYan Zheng if (!ret) 3300c146afadSYan Zheng break; 33015d4f98a2SYan Zheng 33025d4f98a2SYan Zheng root_objectid = gang[ret - 1]->root_key.objectid + 1; 3303c146afadSYan Zheng for (i = 0; i < ret; i++) { 330466b4ffd1SJosef Bacik int err; 330566b4ffd1SJosef Bacik 3306c146afadSYan Zheng root_objectid = gang[i]->root_key.objectid; 330766b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(gang[i]); 330866b4ffd1SJosef Bacik if (err) 330966b4ffd1SJosef Bacik return err; 3310c146afadSYan Zheng } 3311c146afadSYan Zheng root_objectid++; 3312c146afadSYan Zheng } 3313c146afadSYan Zheng return 0; 3314c146afadSYan Zheng } 3315c146afadSYan Zheng 3316c146afadSYan Zheng int btrfs_commit_super(struct btrfs_root *root) 3317c146afadSYan Zheng { 3318c146afadSYan Zheng struct btrfs_trans_handle *trans; 3319c146afadSYan Zheng int ret; 3320c146afadSYan Zheng 3321c146afadSYan Zheng mutex_lock(&root->fs_info->cleaner_mutex); 332224bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 3323c146afadSYan Zheng btrfs_clean_old_snapshots(root); 3324c146afadSYan Zheng mutex_unlock(&root->fs_info->cleaner_mutex); 3325c71bf099SYan, Zheng 3326c71bf099SYan, Zheng /* wait until ongoing cleanup work done */ 3327c71bf099SYan, Zheng down_write(&root->fs_info->cleanup_work_sem); 3328c71bf099SYan, Zheng up_write(&root->fs_info->cleanup_work_sem); 3329c71bf099SYan, Zheng 33307a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 33313612b495STsutomu Itoh if (IS_ERR(trans)) 33323612b495STsutomu Itoh return PTR_ERR(trans); 3333c146afadSYan Zheng ret = btrfs_commit_transaction(trans, root); 333479787eaaSJeff Mahoney if (ret) 333579787eaaSJeff Mahoney return ret; 3336c146afadSYan Zheng /* run commit again to drop the original snapshot */ 33377a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 33383612b495STsutomu Itoh if (IS_ERR(trans)) 33393612b495STsutomu Itoh return PTR_ERR(trans); 334079787eaaSJeff Mahoney ret = btrfs_commit_transaction(trans, root); 334179787eaaSJeff Mahoney if (ret) 334279787eaaSJeff Mahoney return ret; 3343c146afadSYan Zheng ret = btrfs_write_and_wait_transaction(NULL, root); 334479787eaaSJeff Mahoney if (ret) { 334579787eaaSJeff Mahoney btrfs_error(root->fs_info, ret, 334679787eaaSJeff Mahoney "Failed to sync btree inode to disk."); 334779787eaaSJeff Mahoney return ret; 334879787eaaSJeff Mahoney } 3349c146afadSYan Zheng 3350a512bbf8SYan Zheng ret = write_ctree_super(NULL, root, 0); 3351c146afadSYan Zheng return ret; 3352c146afadSYan Zheng } 3353c146afadSYan Zheng 3354e20d96d6SChris Mason int close_ctree(struct btrfs_root *root) 3355eb60ceacSChris Mason { 33560f7d52f4SChris Mason struct btrfs_fs_info *fs_info = root->fs_info; 3357c146afadSYan Zheng int ret; 3358e089f05cSChris Mason 3359facda1e7SChris Mason fs_info->closing = 1; 3360a2135011SChris Mason smp_mb(); 3361a2135011SChris Mason 3362837d5b6eSIlya Dryomov /* pause restriper - we want to resume on mount */ 3363aa1b8cd4SStefan Behrens btrfs_pause_balance(fs_info); 3364837d5b6eSIlya Dryomov 33658dabb742SStefan Behrens btrfs_dev_replace_suspend_for_unmount(fs_info); 33668dabb742SStefan Behrens 3367aa1b8cd4SStefan Behrens btrfs_scrub_cancel(fs_info); 33684cb5300bSChris Mason 33694cb5300bSChris Mason /* wait for any defraggers to finish */ 33704cb5300bSChris Mason wait_event(fs_info->transaction_wait, 33714cb5300bSChris Mason (atomic_read(&fs_info->defrag_running) == 0)); 33724cb5300bSChris Mason 33734cb5300bSChris Mason /* clear out the rbtree of defraggable inodes */ 337426176e7cSMiao Xie btrfs_cleanup_defrag_inodes(fs_info); 33754cb5300bSChris Mason 3376c146afadSYan Zheng if (!(fs_info->sb->s_flags & MS_RDONLY)) { 3377c146afadSYan Zheng ret = btrfs_commit_super(root); 3378d397712bSChris Mason if (ret) 3379d397712bSChris Mason printk(KERN_ERR "btrfs: commit super ret %d\n", ret); 3380c146afadSYan Zheng } 3381ed2ff2cbSChris Mason 338268ce9682SStefan Behrens if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) 338368ce9682SStefan Behrens btrfs_error_commit_super(root); 3384acce952bSliubo 3385300e4f8aSJosef Bacik btrfs_put_block_group_cache(fs_info); 3386300e4f8aSJosef Bacik 3387e3029d9fSAl Viro kthread_stop(fs_info->transaction_kthread); 3388e3029d9fSAl Viro kthread_stop(fs_info->cleaner_kthread); 33898929ecfaSYan, Zheng 3390f25784b3SYan Zheng fs_info->closing = 2; 3391f25784b3SYan Zheng smp_mb(); 3392f25784b3SYan Zheng 3393bcef60f2SArne Jansen btrfs_free_qgroup_config(root->fs_info); 3394bcef60f2SArne Jansen 3395b0c68f8bSChris Mason if (fs_info->delalloc_bytes) { 3396d397712bSChris Mason printk(KERN_INFO "btrfs: at unmount delalloc count %llu\n", 339721380931SJoel Becker (unsigned long long)fs_info->delalloc_bytes); 3398b0c68f8bSChris Mason } 339931153d81SYan Zheng 34005f39d397SChris Mason free_extent_buffer(fs_info->extent_root->node); 34015d4f98a2SYan Zheng free_extent_buffer(fs_info->extent_root->commit_root); 34025f39d397SChris Mason free_extent_buffer(fs_info->tree_root->node); 34035d4f98a2SYan Zheng free_extent_buffer(fs_info->tree_root->commit_root); 3404e3029d9fSAl Viro free_extent_buffer(fs_info->chunk_root->node); 3405e3029d9fSAl Viro free_extent_buffer(fs_info->chunk_root->commit_root); 3406e3029d9fSAl Viro free_extent_buffer(fs_info->dev_root->node); 3407e3029d9fSAl Viro free_extent_buffer(fs_info->dev_root->commit_root); 3408e3029d9fSAl Viro free_extent_buffer(fs_info->csum_root->node); 3409e3029d9fSAl Viro free_extent_buffer(fs_info->csum_root->commit_root); 3410bcef60f2SArne Jansen if (fs_info->quota_root) { 3411bcef60f2SArne Jansen free_extent_buffer(fs_info->quota_root->node); 3412bcef60f2SArne Jansen free_extent_buffer(fs_info->quota_root->commit_root); 3413bcef60f2SArne Jansen } 3414d20f7043SChris Mason 3415e3029d9fSAl Viro btrfs_free_block_groups(fs_info); 3416c146afadSYan Zheng 34170f7d52f4SChris Mason del_fs_roots(fs_info); 3418d10c5f31SChris Mason 3419c146afadSYan Zheng iput(fs_info->btree_inode); 34209ad6b7bcSChris Mason 342161d92c32SChris Mason btrfs_stop_workers(&fs_info->generic_worker); 3422247e743cSChris Mason btrfs_stop_workers(&fs_info->fixup_workers); 3423771ed689SChris Mason btrfs_stop_workers(&fs_info->delalloc_workers); 34248b712842SChris Mason btrfs_stop_workers(&fs_info->workers); 34258b712842SChris Mason btrfs_stop_workers(&fs_info->endio_workers); 3426d20f7043SChris Mason btrfs_stop_workers(&fs_info->endio_meta_workers); 342753b381b3SDavid Woodhouse btrfs_stop_workers(&fs_info->endio_raid56_workers); 342853b381b3SDavid Woodhouse btrfs_stop_workers(&fs_info->rmw_workers); 3429cad321adSChris Mason btrfs_stop_workers(&fs_info->endio_meta_write_workers); 3430e6dcd2dcSChris Mason btrfs_stop_workers(&fs_info->endio_write_workers); 34310cb59c99SJosef Bacik btrfs_stop_workers(&fs_info->endio_freespace_worker); 34321cc127b5SChris Mason btrfs_stop_workers(&fs_info->submit_workers); 343316cdcec7SMiao Xie btrfs_stop_workers(&fs_info->delayed_workers); 3434bab39bf9SJosef Bacik btrfs_stop_workers(&fs_info->caching_workers); 343590519d66SArne Jansen btrfs_stop_workers(&fs_info->readahead_workers); 34368ccf6f19SMiao Xie btrfs_stop_workers(&fs_info->flush_workers); 3437d6bfde87SChris Mason 343821adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 343921adbd5cSStefan Behrens if (btrfs_test_opt(root, CHECK_INTEGRITY)) 344021adbd5cSStefan Behrens btrfsic_unmount(root, fs_info->fs_devices); 344121adbd5cSStefan Behrens #endif 344221adbd5cSStefan Behrens 3443dfe25020SChris Mason btrfs_close_devices(fs_info->fs_devices); 34440b86a832SChris Mason btrfs_mapping_tree_free(&fs_info->mapping_tree); 3445b248a415SChris Mason 344604160088SChris Mason bdi_destroy(&fs_info->bdi); 344776dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 34480b86a832SChris Mason 344953b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 345053b381b3SDavid Woodhouse 3451eb60ceacSChris Mason return 0; 3452eb60ceacSChris Mason } 3453eb60ceacSChris Mason 3454b9fab919SChris Mason int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, 3455b9fab919SChris Mason int atomic) 3456ccd467d6SChris Mason { 34571259ab75SChris Mason int ret; 3458727011e0SChris Mason struct inode *btree_inode = buf->pages[0]->mapping->host; 34591259ab75SChris Mason 34600b32f4bbSJosef Bacik ret = extent_buffer_uptodate(buf); 34611259ab75SChris Mason if (!ret) 34621259ab75SChris Mason return ret; 34631259ab75SChris Mason 34641259ab75SChris Mason ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, 3465b9fab919SChris Mason parent_transid, atomic); 3466b9fab919SChris Mason if (ret == -EAGAIN) 3467b9fab919SChris Mason return ret; 34681259ab75SChris Mason return !ret; 34695f39d397SChris Mason } 34706702ed49SChris Mason 34715f39d397SChris Mason int btrfs_set_buffer_uptodate(struct extent_buffer *buf) 34725f39d397SChris Mason { 34730b32f4bbSJosef Bacik return set_extent_buffer_uptodate(buf); 34745f39d397SChris Mason } 34755f39d397SChris Mason 34765f39d397SChris Mason void btrfs_mark_buffer_dirty(struct extent_buffer *buf) 34775f39d397SChris Mason { 3478727011e0SChris Mason struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; 34795f39d397SChris Mason u64 transid = btrfs_header_generation(buf); 3480b9473439SChris Mason int was_dirty; 3481b4ce94deSChris Mason 3482b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 348331b1a2bdSJulia Lawall if (transid != root->fs_info->generation) 348431b1a2bdSJulia Lawall WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, " 3485d397712bSChris Mason "found %llu running %llu\n", 3486db94535dSChris Mason (unsigned long long)buf->start, 3487d397712bSChris Mason (unsigned long long)transid, 3488d397712bSChris Mason (unsigned long long)root->fs_info->generation); 34890b32f4bbSJosef Bacik was_dirty = set_extent_buffer_dirty(buf); 3490b9473439SChris Mason if (!was_dirty) { 3491b9473439SChris Mason spin_lock(&root->fs_info->delalloc_lock); 3492b9473439SChris Mason root->fs_info->dirty_metadata_bytes += buf->len; 3493b9473439SChris Mason spin_unlock(&root->fs_info->delalloc_lock); 3494b9473439SChris Mason } 3495eb60ceacSChris Mason } 3496eb60ceacSChris Mason 3497b53d3f5dSLiu Bo static void __btrfs_btree_balance_dirty(struct btrfs_root *root, 3498b53d3f5dSLiu Bo int flush_delayed) 349935b7e476SChris Mason { 3500188de649SChris Mason /* 3501188de649SChris Mason * looks as though older kernels can get into trouble with 3502188de649SChris Mason * this code, they end up stuck in balance_dirty_pages forever 3503188de649SChris Mason */ 3504d6bfde87SChris Mason u64 num_dirty; 3505771ed689SChris Mason unsigned long thresh = 32 * 1024 * 1024; 3506d6bfde87SChris Mason 35076933c02eSJens Axboe if (current->flags & PF_MEMALLOC) 3508d6bfde87SChris Mason return; 3509d6bfde87SChris Mason 3510b53d3f5dSLiu Bo if (flush_delayed) 351116cdcec7SMiao Xie btrfs_balance_delayed_items(root); 351216cdcec7SMiao Xie 351316cdcec7SMiao Xie num_dirty = root->fs_info->dirty_metadata_bytes; 351416cdcec7SMiao Xie 351516cdcec7SMiao Xie if (num_dirty > thresh) { 351616cdcec7SMiao Xie balance_dirty_pages_ratelimited_nr( 351716cdcec7SMiao Xie root->fs_info->btree_inode->i_mapping, 1); 351816cdcec7SMiao Xie } 351916cdcec7SMiao Xie return; 352016cdcec7SMiao Xie } 352116cdcec7SMiao Xie 3522b53d3f5dSLiu Bo void btrfs_btree_balance_dirty(struct btrfs_root *root) 352316cdcec7SMiao Xie { 3524b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 1); 352535b7e476SChris Mason } 3526b53d3f5dSLiu Bo 3527b53d3f5dSLiu Bo void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root) 3528b53d3f5dSLiu Bo { 3529b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 0); 3530d6bfde87SChris Mason } 35316b80053dSChris Mason 3532ca7a79adSChris Mason int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) 35336b80053dSChris Mason { 3534727011e0SChris Mason struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; 35350b32f4bbSJosef Bacik return btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 35366b80053dSChris Mason } 35370da5468fSChris Mason 3538fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 3539acce952bSliubo int read_only) 3540acce952bSliubo { 3541fcd1f065SDavid Sterba if (btrfs_super_csum_type(fs_info->super_copy) >= ARRAY_SIZE(btrfs_csum_sizes)) { 3542fcd1f065SDavid Sterba printk(KERN_ERR "btrfs: unsupported checksum algorithm\n"); 3543fcd1f065SDavid Sterba return -EINVAL; 3544fcd1f065SDavid Sterba } 3545acce952bSliubo 3546fcd1f065SDavid Sterba if (read_only) 3547fcd1f065SDavid Sterba return 0; 3548fcd1f065SDavid Sterba 3549fcd1f065SDavid Sterba return 0; 3550fcd1f065SDavid Sterba } 3551fcd1f065SDavid Sterba 355268ce9682SStefan Behrens void btrfs_error_commit_super(struct btrfs_root *root) 3553acce952bSliubo { 3554acce952bSliubo mutex_lock(&root->fs_info->cleaner_mutex); 3555acce952bSliubo btrfs_run_delayed_iputs(root); 3556acce952bSliubo mutex_unlock(&root->fs_info->cleaner_mutex); 3557acce952bSliubo 3558acce952bSliubo down_write(&root->fs_info->cleanup_work_sem); 3559acce952bSliubo up_write(&root->fs_info->cleanup_work_sem); 3560acce952bSliubo 3561acce952bSliubo /* cleanup FS via transaction */ 3562acce952bSliubo btrfs_cleanup_transaction(root); 3563acce952bSliubo } 3564acce952bSliubo 3565143bede5SJeff Mahoney static void btrfs_destroy_ordered_operations(struct btrfs_root *root) 3566acce952bSliubo { 3567acce952bSliubo struct btrfs_inode *btrfs_inode; 3568acce952bSliubo struct list_head splice; 3569acce952bSliubo 3570acce952bSliubo INIT_LIST_HEAD(&splice); 3571acce952bSliubo 3572acce952bSliubo mutex_lock(&root->fs_info->ordered_operations_mutex); 3573acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3574acce952bSliubo 3575acce952bSliubo list_splice_init(&root->fs_info->ordered_operations, &splice); 3576acce952bSliubo while (!list_empty(&splice)) { 3577acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3578acce952bSliubo ordered_operations); 3579acce952bSliubo 3580acce952bSliubo list_del_init(&btrfs_inode->ordered_operations); 3581acce952bSliubo 3582acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3583acce952bSliubo } 3584acce952bSliubo 3585acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3586acce952bSliubo mutex_unlock(&root->fs_info->ordered_operations_mutex); 3587acce952bSliubo } 3588acce952bSliubo 3589143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root) 3590acce952bSliubo { 3591acce952bSliubo struct list_head splice; 3592acce952bSliubo struct btrfs_ordered_extent *ordered; 3593acce952bSliubo struct inode *inode; 3594acce952bSliubo 3595acce952bSliubo INIT_LIST_HEAD(&splice); 3596acce952bSliubo 3597acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3598acce952bSliubo 3599acce952bSliubo list_splice_init(&root->fs_info->ordered_extents, &splice); 3600acce952bSliubo while (!list_empty(&splice)) { 3601acce952bSliubo ordered = list_entry(splice.next, struct btrfs_ordered_extent, 3602acce952bSliubo root_extent_list); 3603acce952bSliubo 3604acce952bSliubo list_del_init(&ordered->root_extent_list); 3605acce952bSliubo atomic_inc(&ordered->refs); 3606acce952bSliubo 3607acce952bSliubo /* the inode may be getting freed (in sys_unlink path). */ 3608acce952bSliubo inode = igrab(ordered->inode); 3609acce952bSliubo 3610acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3611acce952bSliubo if (inode) 3612acce952bSliubo iput(inode); 3613acce952bSliubo 3614acce952bSliubo atomic_set(&ordered->refs, 1); 3615acce952bSliubo btrfs_put_ordered_extent(ordered); 3616acce952bSliubo 3617acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3618acce952bSliubo } 3619acce952bSliubo 3620acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3621acce952bSliubo } 3622acce952bSliubo 362379787eaaSJeff Mahoney int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 3624acce952bSliubo struct btrfs_root *root) 3625acce952bSliubo { 3626acce952bSliubo struct rb_node *node; 3627acce952bSliubo struct btrfs_delayed_ref_root *delayed_refs; 3628acce952bSliubo struct btrfs_delayed_ref_node *ref; 3629acce952bSliubo int ret = 0; 3630acce952bSliubo 3631acce952bSliubo delayed_refs = &trans->delayed_refs; 3632acce952bSliubo 3633acce952bSliubo spin_lock(&delayed_refs->lock); 3634acce952bSliubo if (delayed_refs->num_entries == 0) { 3635cfece4dbSDavid Sterba spin_unlock(&delayed_refs->lock); 3636acce952bSliubo printk(KERN_INFO "delayed_refs has NO entry\n"); 3637acce952bSliubo return ret; 3638acce952bSliubo } 3639acce952bSliubo 3640b939d1abSJosef Bacik while ((node = rb_first(&delayed_refs->root)) != NULL) { 3641acce952bSliubo ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node); 3642acce952bSliubo 3643acce952bSliubo atomic_set(&ref->refs, 1); 3644acce952bSliubo if (btrfs_delayed_ref_is_head(ref)) { 3645acce952bSliubo struct btrfs_delayed_ref_head *head; 3646acce952bSliubo 3647acce952bSliubo head = btrfs_delayed_node_to_head(ref); 3648b939d1abSJosef Bacik if (!mutex_trylock(&head->mutex)) { 3649b939d1abSJosef Bacik atomic_inc(&ref->refs); 365079787eaaSJeff Mahoney spin_unlock(&delayed_refs->lock); 3651b939d1abSJosef Bacik 3652b939d1abSJosef Bacik /* Need to wait for the delayed ref to run */ 3653acce952bSliubo mutex_lock(&head->mutex); 3654b939d1abSJosef Bacik mutex_unlock(&head->mutex); 3655b939d1abSJosef Bacik btrfs_put_delayed_ref(ref); 3656b939d1abSJosef Bacik 3657e18fca73SJosef Bacik spin_lock(&delayed_refs->lock); 3658b939d1abSJosef Bacik continue; 3659b939d1abSJosef Bacik } 3660b939d1abSJosef Bacik 3661acce952bSliubo kfree(head->extent_op); 3662acce952bSliubo delayed_refs->num_heads--; 3663acce952bSliubo if (list_empty(&head->cluster)) 3664acce952bSliubo delayed_refs->num_heads_ready--; 3665acce952bSliubo list_del_init(&head->cluster); 3666acce952bSliubo } 3667b939d1abSJosef Bacik ref->in_tree = 0; 3668b939d1abSJosef Bacik rb_erase(&ref->rb_node, &delayed_refs->root); 3669b939d1abSJosef Bacik delayed_refs->num_entries--; 3670b939d1abSJosef Bacik 3671acce952bSliubo spin_unlock(&delayed_refs->lock); 3672acce952bSliubo btrfs_put_delayed_ref(ref); 3673acce952bSliubo 3674acce952bSliubo cond_resched(); 3675acce952bSliubo spin_lock(&delayed_refs->lock); 3676acce952bSliubo } 3677acce952bSliubo 3678acce952bSliubo spin_unlock(&delayed_refs->lock); 3679acce952bSliubo 3680acce952bSliubo return ret; 3681acce952bSliubo } 3682acce952bSliubo 3683143bede5SJeff Mahoney static void btrfs_destroy_pending_snapshots(struct btrfs_transaction *t) 3684acce952bSliubo { 3685acce952bSliubo struct btrfs_pending_snapshot *snapshot; 3686acce952bSliubo struct list_head splice; 3687acce952bSliubo 3688acce952bSliubo INIT_LIST_HEAD(&splice); 3689acce952bSliubo 3690acce952bSliubo list_splice_init(&t->pending_snapshots, &splice); 3691acce952bSliubo 3692acce952bSliubo while (!list_empty(&splice)) { 3693acce952bSliubo snapshot = list_entry(splice.next, 3694acce952bSliubo struct btrfs_pending_snapshot, 3695acce952bSliubo list); 3696acce952bSliubo 3697acce952bSliubo list_del_init(&snapshot->list); 3698acce952bSliubo 3699acce952bSliubo kfree(snapshot); 3700acce952bSliubo } 3701acce952bSliubo } 3702acce952bSliubo 3703143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) 3704acce952bSliubo { 3705acce952bSliubo struct btrfs_inode *btrfs_inode; 3706acce952bSliubo struct list_head splice; 3707acce952bSliubo 3708acce952bSliubo INIT_LIST_HEAD(&splice); 3709acce952bSliubo 3710acce952bSliubo spin_lock(&root->fs_info->delalloc_lock); 37115be76758SDavid Sterba list_splice_init(&root->fs_info->delalloc_inodes, &splice); 3712acce952bSliubo 3713acce952bSliubo while (!list_empty(&splice)) { 3714acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3715acce952bSliubo delalloc_inodes); 3716acce952bSliubo 3717acce952bSliubo list_del_init(&btrfs_inode->delalloc_inodes); 3718acce952bSliubo 3719acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3720acce952bSliubo } 3721acce952bSliubo 3722acce952bSliubo spin_unlock(&root->fs_info->delalloc_lock); 3723acce952bSliubo } 3724acce952bSliubo 3725acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 3726acce952bSliubo struct extent_io_tree *dirty_pages, 3727acce952bSliubo int mark) 3728acce952bSliubo { 3729acce952bSliubo int ret; 3730acce952bSliubo struct page *page; 3731acce952bSliubo struct inode *btree_inode = root->fs_info->btree_inode; 3732acce952bSliubo struct extent_buffer *eb; 3733acce952bSliubo u64 start = 0; 3734acce952bSliubo u64 end; 3735acce952bSliubo u64 offset; 3736acce952bSliubo unsigned long index; 3737acce952bSliubo 3738acce952bSliubo while (1) { 3739acce952bSliubo ret = find_first_extent_bit(dirty_pages, start, &start, &end, 3740e6138876SJosef Bacik mark, NULL); 3741acce952bSliubo if (ret) 3742acce952bSliubo break; 3743acce952bSliubo 3744acce952bSliubo clear_extent_bits(dirty_pages, start, end, mark, GFP_NOFS); 3745acce952bSliubo while (start <= end) { 3746acce952bSliubo index = start >> PAGE_CACHE_SHIFT; 3747acce952bSliubo start = (u64)(index + 1) << PAGE_CACHE_SHIFT; 3748acce952bSliubo page = find_get_page(btree_inode->i_mapping, index); 3749acce952bSliubo if (!page) 3750acce952bSliubo continue; 3751acce952bSliubo offset = page_offset(page); 3752acce952bSliubo 3753acce952bSliubo spin_lock(&dirty_pages->buffer_lock); 3754acce952bSliubo eb = radix_tree_lookup( 3755acce952bSliubo &(&BTRFS_I(page->mapping->host)->io_tree)->buffer, 3756acce952bSliubo offset >> PAGE_CACHE_SHIFT); 3757acce952bSliubo spin_unlock(&dirty_pages->buffer_lock); 3758ee670f0aSJosef Bacik if (eb) 3759acce952bSliubo ret = test_and_clear_bit(EXTENT_BUFFER_DIRTY, 3760acce952bSliubo &eb->bflags); 3761acce952bSliubo if (PageWriteback(page)) 3762acce952bSliubo end_page_writeback(page); 3763acce952bSliubo 3764acce952bSliubo lock_page(page); 3765acce952bSliubo if (PageDirty(page)) { 3766acce952bSliubo clear_page_dirty_for_io(page); 3767acce952bSliubo spin_lock_irq(&page->mapping->tree_lock); 3768acce952bSliubo radix_tree_tag_clear(&page->mapping->page_tree, 3769acce952bSliubo page_index(page), 3770acce952bSliubo PAGECACHE_TAG_DIRTY); 3771acce952bSliubo spin_unlock_irq(&page->mapping->tree_lock); 3772acce952bSliubo } 3773acce952bSliubo 3774acce952bSliubo unlock_page(page); 3775ee670f0aSJosef Bacik page_cache_release(page); 3776acce952bSliubo } 3777acce952bSliubo } 3778acce952bSliubo 3779acce952bSliubo return ret; 3780acce952bSliubo } 3781acce952bSliubo 3782acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 3783acce952bSliubo struct extent_io_tree *pinned_extents) 3784acce952bSliubo { 3785acce952bSliubo struct extent_io_tree *unpin; 3786acce952bSliubo u64 start; 3787acce952bSliubo u64 end; 3788acce952bSliubo int ret; 3789ed0eaa14SLiu Bo bool loop = true; 3790acce952bSliubo 3791acce952bSliubo unpin = pinned_extents; 3792ed0eaa14SLiu Bo again: 3793acce952bSliubo while (1) { 3794acce952bSliubo ret = find_first_extent_bit(unpin, 0, &start, &end, 3795e6138876SJosef Bacik EXTENT_DIRTY, NULL); 3796acce952bSliubo if (ret) 3797acce952bSliubo break; 3798acce952bSliubo 3799acce952bSliubo /* opt_discard */ 38005378e607SLi Dongyang if (btrfs_test_opt(root, DISCARD)) 38015378e607SLi Dongyang ret = btrfs_error_discard_extent(root, start, 38025378e607SLi Dongyang end + 1 - start, 38035378e607SLi Dongyang NULL); 3804acce952bSliubo 3805acce952bSliubo clear_extent_dirty(unpin, start, end, GFP_NOFS); 3806acce952bSliubo btrfs_error_unpin_extent_range(root, start, end); 3807acce952bSliubo cond_resched(); 3808acce952bSliubo } 3809acce952bSliubo 3810ed0eaa14SLiu Bo if (loop) { 3811ed0eaa14SLiu Bo if (unpin == &root->fs_info->freed_extents[0]) 3812ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[1]; 3813ed0eaa14SLiu Bo else 3814ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[0]; 3815ed0eaa14SLiu Bo loop = false; 3816ed0eaa14SLiu Bo goto again; 3817ed0eaa14SLiu Bo } 3818ed0eaa14SLiu Bo 3819acce952bSliubo return 0; 3820acce952bSliubo } 3821acce952bSliubo 382249b25e05SJeff Mahoney void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, 382349b25e05SJeff Mahoney struct btrfs_root *root) 382449b25e05SJeff Mahoney { 382549b25e05SJeff Mahoney btrfs_destroy_delayed_refs(cur_trans, root); 382649b25e05SJeff Mahoney btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv, 382749b25e05SJeff Mahoney cur_trans->dirty_pages.dirty_bytes); 382849b25e05SJeff Mahoney 382949b25e05SJeff Mahoney /* FIXME: cleanup wait for commit */ 383049b25e05SJeff Mahoney cur_trans->in_commit = 1; 383149b25e05SJeff Mahoney cur_trans->blocked = 1; 383249b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_blocked_wait); 383349b25e05SJeff Mahoney 383449b25e05SJeff Mahoney cur_trans->blocked = 0; 383549b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_wait); 383649b25e05SJeff Mahoney 383749b25e05SJeff Mahoney cur_trans->commit_done = 1; 383849b25e05SJeff Mahoney wake_up(&cur_trans->commit_wait); 383949b25e05SJeff Mahoney 384067cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 384167cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 384267cde344SMiao Xie 384349b25e05SJeff Mahoney btrfs_destroy_pending_snapshots(cur_trans); 384449b25e05SJeff Mahoney 384549b25e05SJeff Mahoney btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, 384649b25e05SJeff Mahoney EXTENT_DIRTY); 38476e841e32SLiu Bo btrfs_destroy_pinned_extent(root, 38486e841e32SLiu Bo root->fs_info->pinned_extents); 384949b25e05SJeff Mahoney 385049b25e05SJeff Mahoney /* 385149b25e05SJeff Mahoney memset(cur_trans, 0, sizeof(*cur_trans)); 385249b25e05SJeff Mahoney kmem_cache_free(btrfs_transaction_cachep, cur_trans); 385349b25e05SJeff Mahoney */ 385449b25e05SJeff Mahoney } 385549b25e05SJeff Mahoney 385649b25e05SJeff Mahoney int btrfs_cleanup_transaction(struct btrfs_root *root) 3857acce952bSliubo { 3858acce952bSliubo struct btrfs_transaction *t; 3859acce952bSliubo LIST_HEAD(list); 3860acce952bSliubo 3861acce952bSliubo mutex_lock(&root->fs_info->transaction_kthread_mutex); 3862acce952bSliubo 3863a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3864acce952bSliubo list_splice_init(&root->fs_info->trans_list, &list); 3865a4abeea4SJosef Bacik root->fs_info->trans_no_join = 1; 3866a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3867a4abeea4SJosef Bacik 3868acce952bSliubo while (!list_empty(&list)) { 3869acce952bSliubo t = list_entry(list.next, struct btrfs_transaction, list); 3870acce952bSliubo if (!t) 3871acce952bSliubo break; 3872acce952bSliubo 3873acce952bSliubo btrfs_destroy_ordered_operations(root); 3874acce952bSliubo 3875acce952bSliubo btrfs_destroy_ordered_extents(root); 3876acce952bSliubo 3877acce952bSliubo btrfs_destroy_delayed_refs(t, root); 3878acce952bSliubo 3879acce952bSliubo btrfs_block_rsv_release(root, 3880acce952bSliubo &root->fs_info->trans_block_rsv, 3881acce952bSliubo t->dirty_pages.dirty_bytes); 3882acce952bSliubo 3883acce952bSliubo /* FIXME: cleanup wait for commit */ 3884acce952bSliubo t->in_commit = 1; 3885acce952bSliubo t->blocked = 1; 388666657b31SJosef Bacik smp_mb(); 3887acce952bSliubo if (waitqueue_active(&root->fs_info->transaction_blocked_wait)) 3888acce952bSliubo wake_up(&root->fs_info->transaction_blocked_wait); 3889acce952bSliubo 3890acce952bSliubo t->blocked = 0; 389166657b31SJosef Bacik smp_mb(); 3892acce952bSliubo if (waitqueue_active(&root->fs_info->transaction_wait)) 3893acce952bSliubo wake_up(&root->fs_info->transaction_wait); 3894acce952bSliubo 3895acce952bSliubo t->commit_done = 1; 389666657b31SJosef Bacik smp_mb(); 3897acce952bSliubo if (waitqueue_active(&t->commit_wait)) 3898acce952bSliubo wake_up(&t->commit_wait); 3899acce952bSliubo 390067cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 390167cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 390267cde344SMiao Xie 3903acce952bSliubo btrfs_destroy_pending_snapshots(t); 3904acce952bSliubo 3905acce952bSliubo btrfs_destroy_delalloc_inodes(root); 3906acce952bSliubo 3907a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3908acce952bSliubo root->fs_info->running_transaction = NULL; 3909a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3910acce952bSliubo 3911acce952bSliubo btrfs_destroy_marked_extents(root, &t->dirty_pages, 3912acce952bSliubo EXTENT_DIRTY); 3913acce952bSliubo 3914acce952bSliubo btrfs_destroy_pinned_extent(root, 3915acce952bSliubo root->fs_info->pinned_extents); 3916acce952bSliubo 391713c5a93eSJosef Bacik atomic_set(&t->use_count, 0); 3918acce952bSliubo list_del_init(&t->list); 3919acce952bSliubo memset(t, 0, sizeof(*t)); 3920acce952bSliubo kmem_cache_free(btrfs_transaction_cachep, t); 3921acce952bSliubo } 3922acce952bSliubo 3923a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3924a4abeea4SJosef Bacik root->fs_info->trans_no_join = 0; 3925a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3926acce952bSliubo mutex_unlock(&root->fs_info->transaction_kthread_mutex); 3927acce952bSliubo 3928acce952bSliubo return 0; 3929acce952bSliubo } 3930acce952bSliubo 3931d1310b2eSChris Mason static struct extent_io_ops btree_extent_io_ops = { 3932ce9adaa5SChris Mason .readpage_end_io_hook = btree_readpage_end_io_hook, 39334bb31e92SArne Jansen .readpage_io_failed_hook = btree_io_failed_hook, 39340b86a832SChris Mason .submit_bio_hook = btree_submit_bio_hook, 3935239b14b3SChris Mason /* note we're sharing with inode.c for the merge bio hook */ 3936239b14b3SChris Mason .merge_bio_hook = btrfs_merge_bio_hook, 39370da5468fSChris Mason }; 3938