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" 47eb60ceacSChris Mason 48d1310b2eSChris Mason static struct extent_io_ops btree_extent_io_ops; 498b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work); 504df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root); 51fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 52acce952bSliubo int read_only); 53143bede5SJeff Mahoney static void btrfs_destroy_ordered_operations(struct btrfs_root *root); 54143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root); 55acce952bSliubo static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 56acce952bSliubo struct btrfs_root *root); 57143bede5SJeff Mahoney static void btrfs_destroy_pending_snapshots(struct btrfs_transaction *t); 58143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); 59acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 60acce952bSliubo struct extent_io_tree *dirty_pages, 61acce952bSliubo int mark); 62acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 63acce952bSliubo struct extent_io_tree *pinned_extents); 64ce9adaa5SChris Mason 65d352ac68SChris Mason /* 66d352ac68SChris Mason * end_io_wq structs are used to do processing in task context when an IO is 67d352ac68SChris Mason * complete. This is used during reads to verify checksums, and it is used 68d352ac68SChris Mason * by writes to insert metadata for new file extents after IO is complete. 69d352ac68SChris Mason */ 70ce9adaa5SChris Mason struct end_io_wq { 71ce9adaa5SChris Mason struct bio *bio; 72ce9adaa5SChris Mason bio_end_io_t *end_io; 73ce9adaa5SChris Mason void *private; 74ce9adaa5SChris Mason struct btrfs_fs_info *info; 75ce9adaa5SChris Mason int error; 7622c59948SChris Mason int metadata; 77ce9adaa5SChris Mason struct list_head list; 788b712842SChris Mason struct btrfs_work work; 79ce9adaa5SChris Mason }; 800da5468fSChris Mason 81d352ac68SChris Mason /* 82d352ac68SChris Mason * async submit bios are used to offload expensive checksumming 83d352ac68SChris Mason * onto the worker threads. They checksum file and metadata bios 84d352ac68SChris Mason * just before they are sent down the IO stack. 85d352ac68SChris Mason */ 8644b8bd7eSChris Mason struct async_submit_bio { 8744b8bd7eSChris Mason struct inode *inode; 8844b8bd7eSChris Mason struct bio *bio; 8944b8bd7eSChris Mason struct list_head list; 904a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start; 914a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done; 9244b8bd7eSChris Mason int rw; 9344b8bd7eSChris Mason int mirror_num; 94c8b97818SChris Mason unsigned long bio_flags; 95eaf25d93SChris Mason /* 96eaf25d93SChris Mason * bio_offset is optional, can be used if the pages in the bio 97eaf25d93SChris Mason * can't tell us where in the file the bio should go 98eaf25d93SChris Mason */ 99eaf25d93SChris Mason u64 bio_offset; 1008b712842SChris Mason struct btrfs_work work; 10179787eaaSJeff Mahoney int error; 10244b8bd7eSChris Mason }; 10344b8bd7eSChris Mason 10485d4e461SChris Mason /* 10585d4e461SChris Mason * Lockdep class keys for extent_buffer->lock's in this root. For a given 10685d4e461SChris Mason * eb, the lockdep key is determined by the btrfs_root it belongs to and 10785d4e461SChris Mason * the level the eb occupies in the tree. 1084008c04aSChris Mason * 10985d4e461SChris Mason * Different roots are used for different purposes and may nest inside each 11085d4e461SChris Mason * other and they require separate keysets. As lockdep keys should be 11185d4e461SChris Mason * static, assign keysets according to the purpose of the root as indicated 11285d4e461SChris Mason * by btrfs_root->objectid. This ensures that all special purpose roots 11385d4e461SChris Mason * have separate keysets. 1144008c04aSChris Mason * 11585d4e461SChris Mason * Lock-nesting across peer nodes is always done with the immediate parent 11685d4e461SChris Mason * node locked thus preventing deadlock. As lockdep doesn't know this, use 11785d4e461SChris Mason * subclass to avoid triggering lockdep warning in such cases. 1184008c04aSChris Mason * 11985d4e461SChris Mason * The key is set by the readpage_end_io_hook after the buffer has passed 12085d4e461SChris Mason * csum validation but before the pages are unlocked. It is also set by 12185d4e461SChris Mason * btrfs_init_new_buffer on freshly allocated blocks. 12285d4e461SChris Mason * 12385d4e461SChris Mason * We also add a check to make sure the highest level of the tree is the 12485d4e461SChris Mason * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code 12585d4e461SChris Mason * needs update as well. 1264008c04aSChris Mason */ 1274008c04aSChris Mason #ifdef CONFIG_DEBUG_LOCK_ALLOC 1284008c04aSChris Mason # if BTRFS_MAX_LEVEL != 8 1294008c04aSChris Mason # error 1304008c04aSChris Mason # endif 13185d4e461SChris Mason 13285d4e461SChris Mason static struct btrfs_lockdep_keyset { 13385d4e461SChris Mason u64 id; /* root objectid */ 13485d4e461SChris Mason const char *name_stem; /* lock name stem */ 13585d4e461SChris Mason char names[BTRFS_MAX_LEVEL + 1][20]; 13685d4e461SChris Mason struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; 13785d4e461SChris Mason } btrfs_lockdep_keysets[] = { 13885d4e461SChris Mason { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, 13985d4e461SChris Mason { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, 14085d4e461SChris Mason { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, 14185d4e461SChris Mason { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, 14285d4e461SChris Mason { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, 14385d4e461SChris Mason { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, 14485d4e461SChris Mason { .id = BTRFS_ORPHAN_OBJECTID, .name_stem = "orphan" }, 14585d4e461SChris Mason { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, 14685d4e461SChris Mason { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, 14785d4e461SChris Mason { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, 14885d4e461SChris Mason { .id = 0, .name_stem = "tree" }, 1494008c04aSChris Mason }; 15085d4e461SChris Mason 15185d4e461SChris Mason void __init btrfs_init_lockdep(void) 15285d4e461SChris Mason { 15385d4e461SChris Mason int i, j; 15485d4e461SChris Mason 15585d4e461SChris Mason /* initialize lockdep class names */ 15685d4e461SChris Mason for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { 15785d4e461SChris Mason struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; 15885d4e461SChris Mason 15985d4e461SChris Mason for (j = 0; j < ARRAY_SIZE(ks->names); j++) 16085d4e461SChris Mason snprintf(ks->names[j], sizeof(ks->names[j]), 16185d4e461SChris Mason "btrfs-%s-%02d", ks->name_stem, j); 16285d4e461SChris Mason } 16385d4e461SChris Mason } 16485d4e461SChris Mason 16585d4e461SChris Mason void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, 16685d4e461SChris Mason int level) 16785d4e461SChris Mason { 16885d4e461SChris Mason struct btrfs_lockdep_keyset *ks; 16985d4e461SChris Mason 17085d4e461SChris Mason BUG_ON(level >= ARRAY_SIZE(ks->keys)); 17185d4e461SChris Mason 17285d4e461SChris Mason /* find the matching keyset, id 0 is the default entry */ 17385d4e461SChris Mason for (ks = btrfs_lockdep_keysets; ks->id; ks++) 17485d4e461SChris Mason if (ks->id == objectid) 17585d4e461SChris Mason break; 17685d4e461SChris Mason 17785d4e461SChris Mason lockdep_set_class_and_name(&eb->lock, 17885d4e461SChris Mason &ks->keys[level], ks->names[level]); 17985d4e461SChris Mason } 18085d4e461SChris Mason 1814008c04aSChris Mason #endif 1824008c04aSChris Mason 183d352ac68SChris Mason /* 184d352ac68SChris Mason * extents on the btree inode are pretty simple, there's one extent 185d352ac68SChris Mason * that covers the entire device 186d352ac68SChris Mason */ 187b2950863SChristoph Hellwig static struct extent_map *btree_get_extent(struct inode *inode, 188306e16ceSDavid Sterba struct page *page, size_t pg_offset, u64 start, u64 len, 1895f39d397SChris Mason int create) 1905f39d397SChris Mason { 1915f39d397SChris Mason struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; 1925f39d397SChris Mason struct extent_map *em; 1935f39d397SChris Mason int ret; 1945f39d397SChris Mason 195890871beSChris Mason read_lock(&em_tree->lock); 196d1310b2eSChris Mason em = lookup_extent_mapping(em_tree, start, len); 197a061fc8dSChris Mason if (em) { 198a061fc8dSChris Mason em->bdev = 199a061fc8dSChris Mason BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 200890871beSChris Mason read_unlock(&em_tree->lock); 2015f39d397SChris Mason goto out; 202a061fc8dSChris Mason } 203890871beSChris Mason read_unlock(&em_tree->lock); 2047b13b7b1SChris Mason 205172ddd60SDavid Sterba em = alloc_extent_map(); 2065f39d397SChris Mason if (!em) { 2075f39d397SChris Mason em = ERR_PTR(-ENOMEM); 2085f39d397SChris Mason goto out; 2095f39d397SChris Mason } 2105f39d397SChris Mason em->start = 0; 2110afbaf8cSChris Mason em->len = (u64)-1; 212c8b97818SChris Mason em->block_len = (u64)-1; 2135f39d397SChris Mason em->block_start = 0; 214a061fc8dSChris Mason em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 215d1310b2eSChris Mason 216890871beSChris Mason write_lock(&em_tree->lock); 2175f39d397SChris Mason ret = add_extent_mapping(em_tree, em); 2185f39d397SChris Mason if (ret == -EEXIST) { 2190afbaf8cSChris Mason u64 failed_start = em->start; 2200afbaf8cSChris Mason u64 failed_len = em->len; 2210afbaf8cSChris Mason 2225f39d397SChris Mason free_extent_map(em); 2237b13b7b1SChris Mason em = lookup_extent_mapping(em_tree, start, len); 2240afbaf8cSChris Mason if (em) { 2257b13b7b1SChris Mason ret = 0; 2260afbaf8cSChris Mason } else { 2270afbaf8cSChris Mason em = lookup_extent_mapping(em_tree, failed_start, 2280afbaf8cSChris Mason failed_len); 2297b13b7b1SChris Mason ret = -EIO; 2300afbaf8cSChris Mason } 2315f39d397SChris Mason } else if (ret) { 2327b13b7b1SChris Mason free_extent_map(em); 2337b13b7b1SChris Mason em = NULL; 2345f39d397SChris Mason } 235890871beSChris Mason write_unlock(&em_tree->lock); 2367b13b7b1SChris Mason 2377b13b7b1SChris Mason if (ret) 2387b13b7b1SChris Mason em = ERR_PTR(ret); 2395f39d397SChris Mason out: 2405f39d397SChris Mason return em; 2415f39d397SChris Mason } 2425f39d397SChris Mason 24319c00ddcSChris Mason u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len) 24419c00ddcSChris Mason { 245163e783eSDavid Woodhouse return crc32c(seed, data, len); 24619c00ddcSChris Mason } 24719c00ddcSChris Mason 24819c00ddcSChris Mason void btrfs_csum_final(u32 crc, char *result) 24919c00ddcSChris Mason { 2507e75bf3fSDavid Sterba put_unaligned_le32(~crc, result); 25119c00ddcSChris Mason } 25219c00ddcSChris Mason 253d352ac68SChris Mason /* 254d352ac68SChris Mason * compute the csum for a btree block, and either verify it or write it 255d352ac68SChris Mason * into the csum field of the block. 256d352ac68SChris Mason */ 25719c00ddcSChris Mason static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, 25819c00ddcSChris Mason int verify) 25919c00ddcSChris Mason { 2606c41761fSDavid Sterba u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy); 261607d432dSJosef Bacik char *result = NULL; 26219c00ddcSChris Mason unsigned long len; 26319c00ddcSChris Mason unsigned long cur_len; 26419c00ddcSChris Mason unsigned long offset = BTRFS_CSUM_SIZE; 26519c00ddcSChris Mason char *kaddr; 26619c00ddcSChris Mason unsigned long map_start; 26719c00ddcSChris Mason unsigned long map_len; 26819c00ddcSChris Mason int err; 26919c00ddcSChris Mason u32 crc = ~(u32)0; 270607d432dSJosef Bacik unsigned long inline_result; 27119c00ddcSChris Mason 27219c00ddcSChris Mason len = buf->len - offset; 27319c00ddcSChris Mason while (len > 0) { 27419c00ddcSChris Mason err = map_private_extent_buffer(buf, offset, 32, 275a6591715SChris Mason &kaddr, &map_start, &map_len); 276d397712bSChris Mason if (err) 27719c00ddcSChris Mason return 1; 27819c00ddcSChris Mason cur_len = min(len, map_len - (offset - map_start)); 27919c00ddcSChris Mason crc = btrfs_csum_data(root, kaddr + offset - map_start, 28019c00ddcSChris Mason crc, cur_len); 28119c00ddcSChris Mason len -= cur_len; 28219c00ddcSChris Mason offset += cur_len; 28319c00ddcSChris Mason } 284607d432dSJosef Bacik if (csum_size > sizeof(inline_result)) { 285607d432dSJosef Bacik result = kzalloc(csum_size * sizeof(char), GFP_NOFS); 286607d432dSJosef Bacik if (!result) 287607d432dSJosef Bacik return 1; 288607d432dSJosef Bacik } else { 289607d432dSJosef Bacik result = (char *)&inline_result; 290607d432dSJosef Bacik } 291607d432dSJosef Bacik 29219c00ddcSChris Mason btrfs_csum_final(crc, result); 29319c00ddcSChris Mason 29419c00ddcSChris Mason if (verify) { 295607d432dSJosef Bacik if (memcmp_extent_buffer(buf, result, 0, csum_size)) { 296e4204dedSChris Mason u32 val; 297e4204dedSChris Mason u32 found = 0; 298607d432dSJosef Bacik memcpy(&found, result, csum_size); 299e4204dedSChris Mason 300607d432dSJosef Bacik read_extent_buffer(buf, &val, 0, csum_size); 3017a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs: %s checksum verify " 302193f284dSChris Mason "failed on %llu wanted %X found %X " 303193f284dSChris Mason "level %d\n", 30419c00ddcSChris Mason root->fs_info->sb->s_id, 305193f284dSChris Mason (unsigned long long)buf->start, val, found, 306193f284dSChris Mason btrfs_header_level(buf)); 307607d432dSJosef Bacik if (result != (char *)&inline_result) 308607d432dSJosef Bacik kfree(result); 30919c00ddcSChris Mason return 1; 31019c00ddcSChris Mason } 31119c00ddcSChris Mason } else { 312607d432dSJosef Bacik write_extent_buffer(buf, result, 0, csum_size); 31319c00ddcSChris Mason } 314607d432dSJosef Bacik if (result != (char *)&inline_result) 315607d432dSJosef Bacik kfree(result); 31619c00ddcSChris Mason return 0; 31719c00ddcSChris Mason } 31819c00ddcSChris Mason 319d352ac68SChris Mason /* 320d352ac68SChris Mason * we can't consider a given block up to date unless the transid of the 321d352ac68SChris Mason * block matches the transid in the parent node's pointer. This is how we 322d352ac68SChris Mason * detect blocks that either didn't get written at all or got written 323d352ac68SChris Mason * in the wrong place. 324d352ac68SChris Mason */ 3251259ab75SChris Mason static int verify_parent_transid(struct extent_io_tree *io_tree, 3261259ab75SChris Mason struct extent_buffer *eb, u64 parent_transid) 3271259ab75SChris Mason { 3282ac55d41SJosef Bacik struct extent_state *cached_state = NULL; 3291259ab75SChris Mason int ret; 3301259ab75SChris Mason 3311259ab75SChris Mason if (!parent_transid || btrfs_header_generation(eb) == parent_transid) 3321259ab75SChris Mason return 0; 3331259ab75SChris Mason 3342ac55d41SJosef Bacik lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, 335d0082371SJeff Mahoney 0, &cached_state); 3360b32f4bbSJosef Bacik if (extent_buffer_uptodate(eb) && 3371259ab75SChris Mason btrfs_header_generation(eb) == parent_transid) { 3381259ab75SChris Mason ret = 0; 3391259ab75SChris Mason goto out; 3401259ab75SChris Mason } 3417a36ddecSDavid Sterba printk_ratelimited("parent transid verify failed on %llu wanted %llu " 342193f284dSChris Mason "found %llu\n", 3431259ab75SChris Mason (unsigned long long)eb->start, 3441259ab75SChris Mason (unsigned long long)parent_transid, 3451259ab75SChris Mason (unsigned long long)btrfs_header_generation(eb)); 3461259ab75SChris Mason ret = 1; 3470b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 34833958dc6SChris Mason out: 3492ac55d41SJosef Bacik unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, 3502ac55d41SJosef Bacik &cached_state, GFP_NOFS); 3511259ab75SChris Mason return ret; 3521259ab75SChris Mason } 3531259ab75SChris Mason 354d352ac68SChris Mason /* 355d352ac68SChris Mason * helper to read a given tree block, doing retries as required when 356d352ac68SChris Mason * the checksums don't match and we have alternate mirrors to try. 357d352ac68SChris Mason */ 358f188591eSChris Mason static int btree_read_extent_buffer_pages(struct btrfs_root *root, 359f188591eSChris Mason struct extent_buffer *eb, 360ca7a79adSChris Mason u64 start, u64 parent_transid) 361f188591eSChris Mason { 362f188591eSChris Mason struct extent_io_tree *io_tree; 363ea466794SJosef Bacik int failed = 0; 364f188591eSChris Mason int ret; 365f188591eSChris Mason int num_copies = 0; 366f188591eSChris Mason int mirror_num = 0; 367ea466794SJosef Bacik int failed_mirror = 0; 368f188591eSChris Mason 369a826d6dcSJosef Bacik clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 370f188591eSChris Mason io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; 371f188591eSChris Mason while (1) { 372bb82ab88SArne Jansen ret = read_extent_buffer_pages(io_tree, eb, start, 373bb82ab88SArne Jansen WAIT_COMPLETE, 374f188591eSChris Mason btree_get_extent, mirror_num); 375727011e0SChris Mason if (!ret && !verify_parent_transid(io_tree, eb, parent_transid)) 376ea466794SJosef Bacik break; 377d397712bSChris Mason 378a826d6dcSJosef Bacik /* 379a826d6dcSJosef Bacik * This buffer's crc is fine, but its contents are corrupted, so 380a826d6dcSJosef Bacik * there is no reason to read the other copies, they won't be 381a826d6dcSJosef Bacik * any less wrong. 382a826d6dcSJosef Bacik */ 383a826d6dcSJosef Bacik if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) 384ea466794SJosef Bacik break; 385ea466794SJosef Bacik 386f188591eSChris Mason num_copies = btrfs_num_copies(&root->fs_info->mapping_tree, 387f188591eSChris Mason eb->start, eb->len); 3884235298eSChris Mason if (num_copies == 1) 389ea466794SJosef Bacik break; 3904235298eSChris Mason 3915cf1ab56SJosef Bacik if (!failed_mirror) { 3925cf1ab56SJosef Bacik failed = 1; 3935cf1ab56SJosef Bacik failed_mirror = eb->read_mirror; 3945cf1ab56SJosef Bacik } 3955cf1ab56SJosef Bacik 396f188591eSChris Mason mirror_num++; 397ea466794SJosef Bacik if (mirror_num == failed_mirror) 398ea466794SJosef Bacik mirror_num++; 399ea466794SJosef Bacik 4004235298eSChris Mason if (mirror_num > num_copies) 401ea466794SJosef Bacik break; 402f188591eSChris Mason } 403ea466794SJosef Bacik 404ea466794SJosef Bacik if (failed && !ret) 405ea466794SJosef Bacik repair_eb_io_failure(root, eb, failed_mirror); 406ea466794SJosef Bacik 407ea466794SJosef Bacik return ret; 408f188591eSChris Mason } 40919c00ddcSChris Mason 410d352ac68SChris Mason /* 411d397712bSChris Mason * checksum a dirty tree block before IO. This has extra checks to make sure 412d397712bSChris Mason * we only fill in the checksum field in the first page of a multi-page block 413d352ac68SChris Mason */ 414d397712bSChris Mason 415b2950863SChristoph Hellwig static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) 41619c00ddcSChris Mason { 417d1310b2eSChris Mason struct extent_io_tree *tree; 41835ebb934SChris Mason u64 start = (u64)page->index << PAGE_CACHE_SHIFT; 41919c00ddcSChris Mason u64 found_start; 42019c00ddcSChris Mason struct extent_buffer *eb; 421f188591eSChris Mason 422d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 42319c00ddcSChris Mason 4244f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 4254f2de97aSJosef Bacik if (page != eb->pages[0]) 4264f2de97aSJosef Bacik return 0; 42719c00ddcSChris Mason found_start = btrfs_header_bytenr(eb); 42819c00ddcSChris Mason if (found_start != start) { 42955c69072SChris Mason WARN_ON(1); 4304f2de97aSJosef Bacik return 0; 43155c69072SChris Mason } 432727011e0SChris Mason if (eb->pages[0] != page) { 43355c69072SChris Mason WARN_ON(1); 4344f2de97aSJosef Bacik return 0; 43555c69072SChris Mason } 43655c69072SChris Mason if (!PageUptodate(page)) { 43755c69072SChris Mason WARN_ON(1); 4384f2de97aSJosef Bacik return 0; 43919c00ddcSChris Mason } 44019c00ddcSChris Mason csum_tree_block(root, eb, 0); 44119c00ddcSChris Mason return 0; 44219c00ddcSChris Mason } 44319c00ddcSChris Mason 4442b82032cSYan Zheng static int check_tree_block_fsid(struct btrfs_root *root, 4452b82032cSYan Zheng struct extent_buffer *eb) 4462b82032cSYan Zheng { 4472b82032cSYan Zheng struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; 4482b82032cSYan Zheng u8 fsid[BTRFS_UUID_SIZE]; 4492b82032cSYan Zheng int ret = 1; 4502b82032cSYan Zheng 4512b82032cSYan Zheng read_extent_buffer(eb, fsid, (unsigned long)btrfs_header_fsid(eb), 4522b82032cSYan Zheng BTRFS_FSID_SIZE); 4532b82032cSYan Zheng while (fs_devices) { 4542b82032cSYan Zheng if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { 4552b82032cSYan Zheng ret = 0; 4562b82032cSYan Zheng break; 4572b82032cSYan Zheng } 4582b82032cSYan Zheng fs_devices = fs_devices->seed; 4592b82032cSYan Zheng } 4602b82032cSYan Zheng return ret; 4612b82032cSYan Zheng } 4622b82032cSYan Zheng 463a826d6dcSJosef Bacik #define CORRUPT(reason, eb, root, slot) \ 464a826d6dcSJosef Bacik printk(KERN_CRIT "btrfs: corrupt leaf, %s: block=%llu," \ 465a826d6dcSJosef Bacik "root=%llu, slot=%d\n", reason, \ 466a826d6dcSJosef Bacik (unsigned long long)btrfs_header_bytenr(eb), \ 467a826d6dcSJosef Bacik (unsigned long long)root->objectid, slot) 468a826d6dcSJosef Bacik 469a826d6dcSJosef Bacik static noinline int check_leaf(struct btrfs_root *root, 470a826d6dcSJosef Bacik struct extent_buffer *leaf) 471a826d6dcSJosef Bacik { 472a826d6dcSJosef Bacik struct btrfs_key key; 473a826d6dcSJosef Bacik struct btrfs_key leaf_key; 474a826d6dcSJosef Bacik u32 nritems = btrfs_header_nritems(leaf); 475a826d6dcSJosef Bacik int slot; 476a826d6dcSJosef Bacik 477a826d6dcSJosef Bacik if (nritems == 0) 478a826d6dcSJosef Bacik return 0; 479a826d6dcSJosef Bacik 480a826d6dcSJosef Bacik /* Check the 0 item */ 481a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != 482a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 483a826d6dcSJosef Bacik CORRUPT("invalid item offset size pair", leaf, root, 0); 484a826d6dcSJosef Bacik return -EIO; 485a826d6dcSJosef Bacik } 486a826d6dcSJosef Bacik 487a826d6dcSJosef Bacik /* 488a826d6dcSJosef Bacik * Check to make sure each items keys are in the correct order and their 489a826d6dcSJosef Bacik * offsets make sense. We only have to loop through nritems-1 because 490a826d6dcSJosef Bacik * we check the current slot against the next slot, which verifies the 491a826d6dcSJosef Bacik * next slot's offset+size makes sense and that the current's slot 492a826d6dcSJosef Bacik * offset is correct. 493a826d6dcSJosef Bacik */ 494a826d6dcSJosef Bacik for (slot = 0; slot < nritems - 1; slot++) { 495a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &leaf_key, slot); 496a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &key, slot + 1); 497a826d6dcSJosef Bacik 498a826d6dcSJosef Bacik /* Make sure the keys are in the right order */ 499a826d6dcSJosef Bacik if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { 500a826d6dcSJosef Bacik CORRUPT("bad key order", leaf, root, slot); 501a826d6dcSJosef Bacik return -EIO; 502a826d6dcSJosef Bacik } 503a826d6dcSJosef Bacik 504a826d6dcSJosef Bacik /* 505a826d6dcSJosef Bacik * Make sure the offset and ends are right, remember that the 506a826d6dcSJosef Bacik * item data starts at the end of the leaf and grows towards the 507a826d6dcSJosef Bacik * front. 508a826d6dcSJosef Bacik */ 509a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, slot) != 510a826d6dcSJosef Bacik btrfs_item_end_nr(leaf, slot + 1)) { 511a826d6dcSJosef Bacik CORRUPT("slot offset bad", leaf, root, slot); 512a826d6dcSJosef Bacik return -EIO; 513a826d6dcSJosef Bacik } 514a826d6dcSJosef Bacik 515a826d6dcSJosef Bacik /* 516a826d6dcSJosef Bacik * Check to make sure that we don't point outside of the leaf, 517a826d6dcSJosef Bacik * just incase all the items are consistent to eachother, but 518a826d6dcSJosef Bacik * all point outside of the leaf. 519a826d6dcSJosef Bacik */ 520a826d6dcSJosef Bacik if (btrfs_item_end_nr(leaf, slot) > 521a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 522a826d6dcSJosef Bacik CORRUPT("slot end outside of leaf", leaf, root, slot); 523a826d6dcSJosef Bacik return -EIO; 524a826d6dcSJosef Bacik } 525a826d6dcSJosef Bacik } 526a826d6dcSJosef Bacik 527a826d6dcSJosef Bacik return 0; 528a826d6dcSJosef Bacik } 529a826d6dcSJosef Bacik 530727011e0SChris Mason struct extent_buffer *find_eb_for_page(struct extent_io_tree *tree, 531727011e0SChris Mason struct page *page, int max_walk) 532727011e0SChris Mason { 533727011e0SChris Mason struct extent_buffer *eb; 534727011e0SChris Mason u64 start = page_offset(page); 535727011e0SChris Mason u64 target = start; 536727011e0SChris Mason u64 min_start; 537727011e0SChris Mason 538727011e0SChris Mason if (start < max_walk) 539727011e0SChris Mason min_start = 0; 540727011e0SChris Mason else 541727011e0SChris Mason min_start = start - max_walk; 542727011e0SChris Mason 543727011e0SChris Mason while (start >= min_start) { 544727011e0SChris Mason eb = find_extent_buffer(tree, start, 0); 545727011e0SChris Mason if (eb) { 546727011e0SChris Mason /* 547727011e0SChris Mason * we found an extent buffer and it contains our page 548727011e0SChris Mason * horray! 549727011e0SChris Mason */ 550727011e0SChris Mason if (eb->start <= target && 551727011e0SChris Mason eb->start + eb->len > target) 552727011e0SChris Mason return eb; 553727011e0SChris Mason 554727011e0SChris Mason /* we found an extent buffer that wasn't for us */ 555727011e0SChris Mason free_extent_buffer(eb); 556727011e0SChris Mason return NULL; 557727011e0SChris Mason } 558727011e0SChris Mason if (start == 0) 559727011e0SChris Mason break; 560727011e0SChris Mason start -= PAGE_CACHE_SIZE; 561727011e0SChris Mason } 562727011e0SChris Mason return NULL; 563727011e0SChris Mason } 564727011e0SChris Mason 565b2950863SChristoph Hellwig static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end, 5665cf1ab56SJosef Bacik struct extent_state *state, int mirror) 567ce9adaa5SChris Mason { 568ce9adaa5SChris Mason struct extent_io_tree *tree; 569ce9adaa5SChris Mason u64 found_start; 570ce9adaa5SChris Mason int found_level; 571ce9adaa5SChris Mason struct extent_buffer *eb; 572ce9adaa5SChris Mason struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 573f188591eSChris Mason int ret = 0; 574727011e0SChris Mason int reads_done; 575ce9adaa5SChris Mason 576ce9adaa5SChris Mason if (!page->private) 577ce9adaa5SChris Mason goto out; 578d397712bSChris Mason 579727011e0SChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 5804f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 581d397712bSChris Mason 5820b32f4bbSJosef Bacik /* the pending IO might have been the only thing that kept this buffer 5830b32f4bbSJosef Bacik * in memory. Make sure we have a ref for all this other checks 5840b32f4bbSJosef Bacik */ 5850b32f4bbSJosef Bacik extent_buffer_get(eb); 5860b32f4bbSJosef Bacik 5870b32f4bbSJosef Bacik reads_done = atomic_dec_and_test(&eb->io_pages); 588727011e0SChris Mason if (!reads_done) 589727011e0SChris Mason goto err; 590f188591eSChris Mason 5915cf1ab56SJosef Bacik eb->read_mirror = mirror; 592ea466794SJosef Bacik if (test_bit(EXTENT_BUFFER_IOERR, &eb->bflags)) { 593ea466794SJosef Bacik ret = -EIO; 594ea466794SJosef Bacik goto err; 595ea466794SJosef Bacik } 596ea466794SJosef Bacik 597ce9adaa5SChris Mason found_start = btrfs_header_bytenr(eb); 598727011e0SChris Mason if (found_start != eb->start) { 5997a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs bad tree block start " 600193f284dSChris Mason "%llu %llu\n", 601a1b32a59SChris Mason (unsigned long long)found_start, 602a1b32a59SChris Mason (unsigned long long)eb->start); 603f188591eSChris Mason ret = -EIO; 604ce9adaa5SChris Mason goto err; 605ce9adaa5SChris Mason } 6062b82032cSYan Zheng if (check_tree_block_fsid(root, eb)) { 6077a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs bad fsid on block %llu\n", 608d397712bSChris Mason (unsigned long long)eb->start); 6091259ab75SChris Mason ret = -EIO; 6101259ab75SChris Mason goto err; 6111259ab75SChris Mason } 612ce9adaa5SChris Mason found_level = btrfs_header_level(eb); 613ce9adaa5SChris Mason 61485d4e461SChris Mason btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), 61585d4e461SChris Mason eb, found_level); 6164008c04aSChris Mason 617ce9adaa5SChris Mason ret = csum_tree_block(root, eb, 1); 618a826d6dcSJosef Bacik if (ret) { 619f188591eSChris Mason ret = -EIO; 620a826d6dcSJosef Bacik goto err; 621a826d6dcSJosef Bacik } 622a826d6dcSJosef Bacik 623a826d6dcSJosef Bacik /* 624a826d6dcSJosef Bacik * If this is a leaf block and it is corrupt, set the corrupt bit so 625a826d6dcSJosef Bacik * that we don't try and read the other copies of this block, just 626a826d6dcSJosef Bacik * return -EIO. 627a826d6dcSJosef Bacik */ 628a826d6dcSJosef Bacik if (found_level == 0 && check_leaf(root, eb)) { 629a826d6dcSJosef Bacik set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 630a826d6dcSJosef Bacik ret = -EIO; 631a826d6dcSJosef Bacik } 632ce9adaa5SChris Mason 6330b32f4bbSJosef Bacik if (!ret) 6340b32f4bbSJosef Bacik set_extent_buffer_uptodate(eb); 635ce9adaa5SChris Mason err: 6364bb31e92SArne Jansen if (test_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) { 6374bb31e92SArne Jansen clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags); 6384bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, ret); 6394bb31e92SArne Jansen } 6404bb31e92SArne Jansen 6410b32f4bbSJosef Bacik if (ret) 6420b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 6430b32f4bbSJosef Bacik free_extent_buffer(eb); 644ce9adaa5SChris Mason out: 645f188591eSChris Mason return ret; 646ce9adaa5SChris Mason } 647ce9adaa5SChris Mason 648ea466794SJosef Bacik static int btree_io_failed_hook(struct page *page, int failed_mirror) 6494bb31e92SArne Jansen { 6504bb31e92SArne Jansen struct extent_buffer *eb; 6514bb31e92SArne Jansen struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 6524bb31e92SArne Jansen 6534f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 654ea466794SJosef Bacik set_bit(EXTENT_BUFFER_IOERR, &eb->bflags); 6555cf1ab56SJosef Bacik eb->read_mirror = failed_mirror; 656ea466794SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 6574bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, -EIO); 6584bb31e92SArne Jansen return -EIO; /* we fixed nothing */ 6594bb31e92SArne Jansen } 6604bb31e92SArne Jansen 661ce9adaa5SChris Mason static void end_workqueue_bio(struct bio *bio, int err) 662ce9adaa5SChris Mason { 663ce9adaa5SChris Mason struct end_io_wq *end_io_wq = bio->bi_private; 664ce9adaa5SChris Mason struct btrfs_fs_info *fs_info; 665ce9adaa5SChris Mason 666ce9adaa5SChris Mason fs_info = end_io_wq->info; 667ce9adaa5SChris Mason end_io_wq->error = err; 6688b712842SChris Mason end_io_wq->work.func = end_workqueue_fn; 6698b712842SChris Mason end_io_wq->work.flags = 0; 670d20f7043SChris Mason 6717b6d91daSChristoph Hellwig if (bio->bi_rw & REQ_WRITE) { 6720cb59c99SJosef Bacik if (end_io_wq->metadata == 1) 673cad321adSChris Mason btrfs_queue_worker(&fs_info->endio_meta_write_workers, 674cad321adSChris Mason &end_io_wq->work); 6750cb59c99SJosef Bacik else if (end_io_wq->metadata == 2) 6760cb59c99SJosef Bacik btrfs_queue_worker(&fs_info->endio_freespace_worker, 6770cb59c99SJosef Bacik &end_io_wq->work); 678cad321adSChris Mason else 679e6dcd2dcSChris Mason btrfs_queue_worker(&fs_info->endio_write_workers, 680e6dcd2dcSChris Mason &end_io_wq->work); 681d20f7043SChris Mason } else { 682d20f7043SChris Mason if (end_io_wq->metadata) 683d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_meta_workers, 684d20f7043SChris Mason &end_io_wq->work); 685e6dcd2dcSChris Mason else 686d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_workers, 687d20f7043SChris Mason &end_io_wq->work); 688d20f7043SChris Mason } 689ce9adaa5SChris Mason } 690ce9adaa5SChris Mason 6910cb59c99SJosef Bacik /* 6920cb59c99SJosef Bacik * For the metadata arg you want 6930cb59c99SJosef Bacik * 6940cb59c99SJosef Bacik * 0 - if data 6950cb59c99SJosef Bacik * 1 - if normal metadta 6960cb59c99SJosef Bacik * 2 - if writing to the free space cache area 6970cb59c99SJosef Bacik */ 69822c59948SChris Mason int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, 69922c59948SChris Mason int metadata) 7000b86a832SChris Mason { 701ce9adaa5SChris Mason struct end_io_wq *end_io_wq; 702ce9adaa5SChris Mason end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); 703ce9adaa5SChris Mason if (!end_io_wq) 704ce9adaa5SChris Mason return -ENOMEM; 705ce9adaa5SChris Mason 706ce9adaa5SChris Mason end_io_wq->private = bio->bi_private; 707ce9adaa5SChris Mason end_io_wq->end_io = bio->bi_end_io; 70822c59948SChris Mason end_io_wq->info = info; 709ce9adaa5SChris Mason end_io_wq->error = 0; 710ce9adaa5SChris Mason end_io_wq->bio = bio; 71122c59948SChris Mason end_io_wq->metadata = metadata; 712ce9adaa5SChris Mason 713ce9adaa5SChris Mason bio->bi_private = end_io_wq; 714ce9adaa5SChris Mason bio->bi_end_io = end_workqueue_bio; 71522c59948SChris Mason return 0; 71622c59948SChris Mason } 71722c59948SChris Mason 718b64a2851SChris Mason unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) 7194854ddd0SChris Mason { 7204854ddd0SChris Mason unsigned long limit = min_t(unsigned long, 7214854ddd0SChris Mason info->workers.max_workers, 7224854ddd0SChris Mason info->fs_devices->open_devices); 7234854ddd0SChris Mason return 256 * limit; 7244854ddd0SChris Mason } 7254854ddd0SChris Mason 7264a69a410SChris Mason static void run_one_async_start(struct btrfs_work *work) 7274a69a410SChris Mason { 7284a69a410SChris Mason struct async_submit_bio *async; 72979787eaaSJeff Mahoney int ret; 7304a69a410SChris Mason 7314a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 73279787eaaSJeff Mahoney ret = async->submit_bio_start(async->inode, async->rw, async->bio, 733eaf25d93SChris Mason async->mirror_num, async->bio_flags, 734eaf25d93SChris Mason async->bio_offset); 73579787eaaSJeff Mahoney if (ret) 73679787eaaSJeff Mahoney async->error = ret; 7374a69a410SChris Mason } 7384a69a410SChris Mason 7394a69a410SChris Mason static void run_one_async_done(struct btrfs_work *work) 7408b712842SChris Mason { 7418b712842SChris Mason struct btrfs_fs_info *fs_info; 7428b712842SChris Mason struct async_submit_bio *async; 7434854ddd0SChris Mason int limit; 7448b712842SChris Mason 7458b712842SChris Mason async = container_of(work, struct async_submit_bio, work); 7468b712842SChris Mason fs_info = BTRFS_I(async->inode)->root->fs_info; 7474854ddd0SChris Mason 748b64a2851SChris Mason limit = btrfs_async_submit_limit(fs_info); 7494854ddd0SChris Mason limit = limit * 2 / 3; 7504854ddd0SChris Mason 7518b712842SChris Mason atomic_dec(&fs_info->nr_async_submits); 7520986fe9eSChris Mason 753b64a2851SChris Mason if (atomic_read(&fs_info->nr_async_submits) < limit && 754b64a2851SChris Mason waitqueue_active(&fs_info->async_submit_wait)) 7554854ddd0SChris Mason wake_up(&fs_info->async_submit_wait); 7564854ddd0SChris Mason 75779787eaaSJeff Mahoney /* If an error occured we just want to clean up the bio and move on */ 75879787eaaSJeff Mahoney if (async->error) { 75979787eaaSJeff Mahoney bio_endio(async->bio, async->error); 76079787eaaSJeff Mahoney return; 76179787eaaSJeff Mahoney } 76279787eaaSJeff Mahoney 7634a69a410SChris Mason async->submit_bio_done(async->inode, async->rw, async->bio, 764eaf25d93SChris Mason async->mirror_num, async->bio_flags, 765eaf25d93SChris Mason async->bio_offset); 7664a69a410SChris Mason } 7674a69a410SChris Mason 7684a69a410SChris Mason static void run_one_async_free(struct btrfs_work *work) 7694a69a410SChris Mason { 7704a69a410SChris Mason struct async_submit_bio *async; 7714a69a410SChris Mason 7724a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 7738b712842SChris Mason kfree(async); 7748b712842SChris Mason } 7758b712842SChris Mason 77644b8bd7eSChris Mason int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, 77744b8bd7eSChris Mason int rw, struct bio *bio, int mirror_num, 778c8b97818SChris Mason unsigned long bio_flags, 779eaf25d93SChris Mason u64 bio_offset, 7804a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start, 7814a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done) 78244b8bd7eSChris Mason { 78344b8bd7eSChris Mason struct async_submit_bio *async; 78444b8bd7eSChris Mason 78544b8bd7eSChris Mason async = kmalloc(sizeof(*async), GFP_NOFS); 78644b8bd7eSChris Mason if (!async) 78744b8bd7eSChris Mason return -ENOMEM; 78844b8bd7eSChris Mason 78944b8bd7eSChris Mason async->inode = inode; 79044b8bd7eSChris Mason async->rw = rw; 79144b8bd7eSChris Mason async->bio = bio; 79244b8bd7eSChris Mason async->mirror_num = mirror_num; 7934a69a410SChris Mason async->submit_bio_start = submit_bio_start; 7944a69a410SChris Mason async->submit_bio_done = submit_bio_done; 7954a69a410SChris Mason 7964a69a410SChris Mason async->work.func = run_one_async_start; 7974a69a410SChris Mason async->work.ordered_func = run_one_async_done; 7984a69a410SChris Mason async->work.ordered_free = run_one_async_free; 7994a69a410SChris Mason 8008b712842SChris Mason async->work.flags = 0; 801c8b97818SChris Mason async->bio_flags = bio_flags; 802eaf25d93SChris Mason async->bio_offset = bio_offset; 8038c8bee1dSChris Mason 80479787eaaSJeff Mahoney async->error = 0; 80579787eaaSJeff Mahoney 806cb03c743SChris Mason atomic_inc(&fs_info->nr_async_submits); 807d313d7a3SChris Mason 8087b6d91daSChristoph Hellwig if (rw & REQ_SYNC) 809d313d7a3SChris Mason btrfs_set_work_high_prio(&async->work); 810d313d7a3SChris Mason 8118b712842SChris Mason btrfs_queue_worker(&fs_info->workers, &async->work); 8129473f16cSChris Mason 813771ed689SChris Mason while (atomic_read(&fs_info->async_submit_draining) && 814771ed689SChris Mason atomic_read(&fs_info->nr_async_submits)) { 815771ed689SChris Mason wait_event(fs_info->async_submit_wait, 816771ed689SChris Mason (atomic_read(&fs_info->nr_async_submits) == 0)); 817771ed689SChris Mason } 818771ed689SChris Mason 81944b8bd7eSChris Mason return 0; 82044b8bd7eSChris Mason } 82144b8bd7eSChris Mason 822ce3ed71aSChris Mason static int btree_csum_one_bio(struct bio *bio) 823ce3ed71aSChris Mason { 824ce3ed71aSChris Mason struct bio_vec *bvec = bio->bi_io_vec; 825ce3ed71aSChris Mason int bio_index = 0; 826ce3ed71aSChris Mason struct btrfs_root *root; 82779787eaaSJeff Mahoney int ret = 0; 828ce3ed71aSChris Mason 829ce3ed71aSChris Mason WARN_ON(bio->bi_vcnt <= 0); 830ce3ed71aSChris Mason while (bio_index < bio->bi_vcnt) { 831ce3ed71aSChris Mason root = BTRFS_I(bvec->bv_page->mapping->host)->root; 83279787eaaSJeff Mahoney ret = csum_dirty_buffer(root, bvec->bv_page); 83379787eaaSJeff Mahoney if (ret) 83479787eaaSJeff Mahoney break; 835ce3ed71aSChris Mason bio_index++; 836ce3ed71aSChris Mason bvec++; 837ce3ed71aSChris Mason } 83879787eaaSJeff Mahoney return ret; 839ce3ed71aSChris Mason } 840ce3ed71aSChris Mason 8414a69a410SChris Mason static int __btree_submit_bio_start(struct inode *inode, int rw, 8424a69a410SChris Mason struct bio *bio, int mirror_num, 843eaf25d93SChris Mason unsigned long bio_flags, 844eaf25d93SChris Mason u64 bio_offset) 84522c59948SChris Mason { 8468b712842SChris Mason /* 8478b712842SChris Mason * when we're called for a write, we're already in the async 8485443be45SChris Mason * submission context. Just jump into btrfs_map_bio 8498b712842SChris Mason */ 85079787eaaSJeff Mahoney return btree_csum_one_bio(bio); 85122c59948SChris Mason } 85222c59948SChris Mason 8534a69a410SChris Mason static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, 854eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 855eaf25d93SChris Mason u64 bio_offset) 8564a69a410SChris Mason { 8578b712842SChris Mason /* 8584a69a410SChris Mason * when we're called for a write, we're already in the async 8594a69a410SChris Mason * submission context. Just jump into btrfs_map_bio 8608b712842SChris Mason */ 8618b712842SChris Mason return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); 8620b86a832SChris Mason } 8630b86a832SChris Mason 86444b8bd7eSChris Mason static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, 865eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 866eaf25d93SChris Mason u64 bio_offset) 86744b8bd7eSChris Mason { 8684a69a410SChris Mason int ret; 869cad321adSChris Mason 8707b6d91daSChristoph Hellwig if (!(rw & REQ_WRITE)) { 871f3f266abSChris Mason 872cad321adSChris Mason /* 873cad321adSChris Mason * called for a read, do the setup so that checksum validation 874cad321adSChris Mason * can happen in the async kernel threads 875cad321adSChris Mason */ 876f3f266abSChris Mason ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, 877f3f266abSChris Mason bio, 1); 8781d4284bdSChris Mason if (ret) 8791d4284bdSChris Mason return ret; 8804a69a410SChris Mason return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 8816f3577bdSChris Mason mirror_num, 0); 88244b8bd7eSChris Mason } 883d313d7a3SChris Mason 884cad321adSChris Mason /* 885cad321adSChris Mason * kthread helpers are used to submit writes so that checksumming 886cad321adSChris Mason * can happen in parallel across all CPUs 887cad321adSChris Mason */ 88844b8bd7eSChris Mason return btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, 889c8b97818SChris Mason inode, rw, bio, mirror_num, 0, 890eaf25d93SChris Mason bio_offset, 8914a69a410SChris Mason __btree_submit_bio_start, 8924a69a410SChris Mason __btree_submit_bio_done); 89344b8bd7eSChris Mason } 89444b8bd7eSChris Mason 8953dd1462eSJan Beulich #ifdef CONFIG_MIGRATION 896784b4e29SChris Mason static int btree_migratepage(struct address_space *mapping, 897a6bc32b8SMel Gorman struct page *newpage, struct page *page, 898a6bc32b8SMel Gorman enum migrate_mode mode) 899784b4e29SChris Mason { 900784b4e29SChris Mason /* 901784b4e29SChris Mason * we can't safely write a btree page from here, 902784b4e29SChris Mason * we haven't done the locking hook 903784b4e29SChris Mason */ 904784b4e29SChris Mason if (PageDirty(page)) 905784b4e29SChris Mason return -EAGAIN; 906784b4e29SChris Mason /* 907784b4e29SChris Mason * Buffers may be managed in a filesystem specific way. 908784b4e29SChris Mason * We must have no buffers or drop them. 909784b4e29SChris Mason */ 910784b4e29SChris Mason if (page_has_private(page) && 911784b4e29SChris Mason !try_to_release_page(page, GFP_KERNEL)) 912784b4e29SChris Mason return -EAGAIN; 913a6bc32b8SMel Gorman return migrate_page(mapping, newpage, page, mode); 914784b4e29SChris Mason } 9153dd1462eSJan Beulich #endif 916784b4e29SChris Mason 9170da5468fSChris Mason 9180da5468fSChris Mason static int btree_writepages(struct address_space *mapping, 9190da5468fSChris Mason struct writeback_control *wbc) 9200da5468fSChris Mason { 921d1310b2eSChris Mason struct extent_io_tree *tree; 922d1310b2eSChris Mason tree = &BTRFS_I(mapping->host)->io_tree; 923d8d5f3e1SChris Mason if (wbc->sync_mode == WB_SYNC_NONE) { 924b9473439SChris Mason struct btrfs_root *root = BTRFS_I(mapping->host)->root; 925793955bcSChris Mason u64 num_dirty; 92624ab9cd8SChris Mason unsigned long thresh = 32 * 1024 * 1024; 927448d640bSChris Mason 928448d640bSChris Mason if (wbc->for_kupdate) 929448d640bSChris Mason return 0; 930448d640bSChris Mason 931b9473439SChris Mason /* this is a bit racy, but that's ok */ 932b9473439SChris Mason num_dirty = root->fs_info->dirty_metadata_bytes; 933d397712bSChris Mason if (num_dirty < thresh) 934793955bcSChris Mason return 0; 935793955bcSChris Mason } 9360b32f4bbSJosef Bacik return btree_write_cache_pages(mapping, wbc); 9370da5468fSChris Mason } 9380da5468fSChris Mason 939b2950863SChristoph Hellwig static int btree_readpage(struct file *file, struct page *page) 9405f39d397SChris Mason { 941d1310b2eSChris Mason struct extent_io_tree *tree; 942d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 9438ddc7d9cSJan Schmidt return extent_read_full_page(tree, page, btree_get_extent, 0); 9445f39d397SChris Mason } 9455f39d397SChris Mason 94670dec807SChris Mason static int btree_releasepage(struct page *page, gfp_t gfp_flags) 9475f39d397SChris Mason { 94898509cfcSChris Mason if (PageWriteback(page) || PageDirty(page)) 94998509cfcSChris Mason return 0; 9500c4e538bSDavid Sterba /* 9510c4e538bSDavid Sterba * We need to mask out eg. __GFP_HIGHMEM and __GFP_DMA32 as we're doing 9520c4e538bSDavid Sterba * slab allocation from alloc_extent_state down the callchain where 9530c4e538bSDavid Sterba * it'd hit a BUG_ON as those flags are not allowed. 9540c4e538bSDavid Sterba */ 9550c4e538bSDavid Sterba gfp_flags &= ~GFP_SLAB_BUG_MASK; 9560c4e538bSDavid Sterba 9573083ee2eSJosef Bacik return try_release_extent_buffer(page, gfp_flags); 958d98237b3SChris Mason } 959d98237b3SChris Mason 9605f39d397SChris Mason static void btree_invalidatepage(struct page *page, unsigned long offset) 961d98237b3SChris Mason { 962d1310b2eSChris Mason struct extent_io_tree *tree; 963d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 9645f39d397SChris Mason extent_invalidatepage(tree, page, offset); 9655f39d397SChris Mason btree_releasepage(page, GFP_NOFS); 9669ad6b7bcSChris Mason if (PagePrivate(page)) { 967d397712bSChris Mason printk(KERN_WARNING "btrfs warning page private not zero " 968d397712bSChris Mason "on page %llu\n", (unsigned long long)page_offset(page)); 9699ad6b7bcSChris Mason ClearPagePrivate(page); 9709ad6b7bcSChris Mason set_page_private(page, 0); 9719ad6b7bcSChris Mason page_cache_release(page); 9729ad6b7bcSChris Mason } 973d98237b3SChris Mason } 974d98237b3SChris Mason 9750b32f4bbSJosef Bacik static int btree_set_page_dirty(struct page *page) 9760b32f4bbSJosef Bacik { 9770b32f4bbSJosef Bacik struct extent_buffer *eb; 9780b32f4bbSJosef Bacik 9790b32f4bbSJosef Bacik BUG_ON(!PagePrivate(page)); 9800b32f4bbSJosef Bacik eb = (struct extent_buffer *)page->private; 9810b32f4bbSJosef Bacik BUG_ON(!eb); 9820b32f4bbSJosef Bacik BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); 9830b32f4bbSJosef Bacik BUG_ON(!atomic_read(&eb->refs)); 9840b32f4bbSJosef Bacik btrfs_assert_tree_locked(eb); 9850b32f4bbSJosef Bacik return __set_page_dirty_nobuffers(page); 9860b32f4bbSJosef Bacik } 9870b32f4bbSJosef Bacik 9887f09410bSAlexey Dobriyan static const struct address_space_operations btree_aops = { 989d98237b3SChris Mason .readpage = btree_readpage, 9900da5468fSChris Mason .writepages = btree_writepages, 9915f39d397SChris Mason .releasepage = btree_releasepage, 9925f39d397SChris Mason .invalidatepage = btree_invalidatepage, 9935a92bc88SChris Mason #ifdef CONFIG_MIGRATION 994784b4e29SChris Mason .migratepage = btree_migratepage, 9955a92bc88SChris Mason #endif 9960b32f4bbSJosef Bacik .set_page_dirty = btree_set_page_dirty, 997d98237b3SChris Mason }; 998123abc88SChris Mason 999ca7a79adSChris Mason int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, 1000ca7a79adSChris Mason u64 parent_transid) 1001090d1875SChris Mason { 10025f39d397SChris Mason struct extent_buffer *buf = NULL; 10035f39d397SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 1004de428b63SChris Mason int ret = 0; 1005090d1875SChris Mason 1006db94535dSChris Mason buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 10075f39d397SChris Mason if (!buf) 1008090d1875SChris Mason return 0; 1009d1310b2eSChris Mason read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, 1010bb82ab88SArne Jansen buf, 0, WAIT_NONE, btree_get_extent, 0); 10115f39d397SChris Mason free_extent_buffer(buf); 1012de428b63SChris Mason return ret; 1013090d1875SChris Mason } 1014090d1875SChris Mason 1015ab0fff03SArne Jansen int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, 1016ab0fff03SArne Jansen int mirror_num, struct extent_buffer **eb) 1017ab0fff03SArne Jansen { 1018ab0fff03SArne Jansen struct extent_buffer *buf = NULL; 1019ab0fff03SArne Jansen struct inode *btree_inode = root->fs_info->btree_inode; 1020ab0fff03SArne Jansen struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; 1021ab0fff03SArne Jansen int ret; 1022ab0fff03SArne Jansen 1023ab0fff03SArne Jansen buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 1024ab0fff03SArne Jansen if (!buf) 1025ab0fff03SArne Jansen return 0; 1026ab0fff03SArne Jansen 1027ab0fff03SArne Jansen set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); 1028ab0fff03SArne Jansen 1029ab0fff03SArne Jansen ret = read_extent_buffer_pages(io_tree, buf, 0, WAIT_PAGE_LOCK, 1030ab0fff03SArne Jansen btree_get_extent, mirror_num); 1031ab0fff03SArne Jansen if (ret) { 1032ab0fff03SArne Jansen free_extent_buffer(buf); 1033ab0fff03SArne Jansen return ret; 1034ab0fff03SArne Jansen } 1035ab0fff03SArne Jansen 1036ab0fff03SArne Jansen if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { 1037ab0fff03SArne Jansen free_extent_buffer(buf); 1038ab0fff03SArne Jansen return -EIO; 10390b32f4bbSJosef Bacik } else if (extent_buffer_uptodate(buf)) { 1040ab0fff03SArne Jansen *eb = buf; 1041ab0fff03SArne Jansen } else { 1042ab0fff03SArne Jansen free_extent_buffer(buf); 1043ab0fff03SArne Jansen } 1044ab0fff03SArne Jansen return 0; 1045ab0fff03SArne Jansen } 1046ab0fff03SArne Jansen 10470999df54SChris Mason struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, 10480999df54SChris Mason u64 bytenr, u32 blocksize) 10490999df54SChris Mason { 10500999df54SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 10510999df54SChris Mason struct extent_buffer *eb; 10520999df54SChris Mason eb = find_extent_buffer(&BTRFS_I(btree_inode)->io_tree, 1053f09d1f60SDavid Sterba bytenr, blocksize); 10540999df54SChris Mason return eb; 10550999df54SChris Mason } 10560999df54SChris Mason 10570999df54SChris Mason struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, 10580999df54SChris Mason u64 bytenr, u32 blocksize) 10590999df54SChris Mason { 10600999df54SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 10610999df54SChris Mason struct extent_buffer *eb; 10620999df54SChris Mason 10630999df54SChris Mason eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree, 1064727011e0SChris Mason bytenr, blocksize); 10650999df54SChris Mason return eb; 10660999df54SChris Mason } 10670999df54SChris Mason 10680999df54SChris Mason 1069e02119d5SChris Mason int btrfs_write_tree_block(struct extent_buffer *buf) 1070e02119d5SChris Mason { 1071727011e0SChris Mason return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, 10728aa38c31SChristoph Hellwig buf->start + buf->len - 1); 1073e02119d5SChris Mason } 1074e02119d5SChris Mason 1075e02119d5SChris Mason int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) 1076e02119d5SChris Mason { 1077727011e0SChris Mason return filemap_fdatawait_range(buf->pages[0]->mapping, 10788aa38c31SChristoph Hellwig buf->start, buf->start + buf->len - 1); 1079e02119d5SChris Mason } 1080e02119d5SChris Mason 1081db94535dSChris Mason struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, 1082ca7a79adSChris Mason u32 blocksize, u64 parent_transid) 1083e20d96d6SChris Mason { 10845f39d397SChris Mason struct extent_buffer *buf = NULL; 108519c00ddcSChris Mason int ret; 108619c00ddcSChris Mason 1087db94535dSChris Mason buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 10885f39d397SChris Mason if (!buf) 1089d98237b3SChris Mason return NULL; 1090e4204dedSChris Mason 1091ca7a79adSChris Mason ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 10925f39d397SChris Mason return buf; 1093ce9adaa5SChris Mason 1094eb60ceacSChris Mason } 1095eb60ceacSChris Mason 1096d5c13f92SJeff Mahoney void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, 10975f39d397SChris Mason struct extent_buffer *buf) 1098ed2ff2cbSChris Mason { 109955c69072SChris Mason if (btrfs_header_generation(buf) == 1100925baeddSChris Mason root->fs_info->running_transaction->transid) { 1101b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 1102b4ce94deSChris Mason 1103b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { 1104b9473439SChris Mason spin_lock(&root->fs_info->delalloc_lock); 1105b9473439SChris Mason if (root->fs_info->dirty_metadata_bytes >= buf->len) 1106b9473439SChris Mason root->fs_info->dirty_metadata_bytes -= buf->len; 1107d5c13f92SJeff Mahoney else { 1108d5c13f92SJeff Mahoney spin_unlock(&root->fs_info->delalloc_lock); 1109d5c13f92SJeff Mahoney btrfs_panic(root->fs_info, -EOVERFLOW, 1110d5c13f92SJeff Mahoney "Can't clear %lu bytes from " 1111d5c13f92SJeff Mahoney " dirty_mdatadata_bytes (%lu)", 1112d5c13f92SJeff Mahoney buf->len, 1113d5c13f92SJeff Mahoney root->fs_info->dirty_metadata_bytes); 1114d5c13f92SJeff Mahoney } 1115b9473439SChris Mason spin_unlock(&root->fs_info->delalloc_lock); 1116b9473439SChris Mason } 1117b4ce94deSChris Mason 1118b9473439SChris Mason /* ugh, clear_extent_buffer_dirty needs to lock the page */ 1119b9473439SChris Mason btrfs_set_lock_blocking(buf); 11200b32f4bbSJosef Bacik clear_extent_buffer_dirty(buf); 1121925baeddSChris Mason } 11225f39d397SChris Mason } 11235f39d397SChris Mason 1124143bede5SJeff Mahoney static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, 112587ee04ebSChris Mason u32 stripesize, struct btrfs_root *root, 11269f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 1127e20d96d6SChris Mason u64 objectid) 1128d97e63b6SChris Mason { 1129cfaa7295SChris Mason root->node = NULL; 1130a28ec197SChris Mason root->commit_root = NULL; 1131db94535dSChris Mason root->sectorsize = sectorsize; 1132db94535dSChris Mason root->nodesize = nodesize; 1133db94535dSChris Mason root->leafsize = leafsize; 113487ee04ebSChris Mason root->stripesize = stripesize; 1135123abc88SChris Mason root->ref_cows = 0; 11360b86a832SChris Mason root->track_dirty = 0; 1137c71bf099SYan, Zheng root->in_radix = 0; 1138d68fc57bSYan, Zheng root->orphan_item_inserted = 0; 1139d68fc57bSYan, Zheng root->orphan_cleanup_state = 0; 11400b86a832SChris Mason 11410f7d52f4SChris Mason root->objectid = objectid; 11420f7d52f4SChris Mason root->last_trans = 0; 114313a8a7c8SYan, Zheng root->highest_objectid = 0; 114458176a96SJosef Bacik root->name = NULL; 11456bef4d31SEric Paris root->inode_tree = RB_ROOT; 114616cdcec7SMiao Xie INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); 1147f0486c68SYan, Zheng root->block_rsv = NULL; 1148d68fc57bSYan, Zheng root->orphan_block_rsv = NULL; 11490b86a832SChris Mason 11500b86a832SChris Mason INIT_LIST_HEAD(&root->dirty_list); 11517b128766SJosef Bacik INIT_LIST_HEAD(&root->orphan_list); 11525d4f98a2SYan Zheng INIT_LIST_HEAD(&root->root_list); 1153d68fc57bSYan, Zheng spin_lock_init(&root->orphan_lock); 11545d4f98a2SYan Zheng spin_lock_init(&root->inode_lock); 1155f0486c68SYan, Zheng spin_lock_init(&root->accounting_lock); 1156a2135011SChris Mason mutex_init(&root->objectid_mutex); 1157e02119d5SChris Mason mutex_init(&root->log_mutex); 11587237f183SYan Zheng init_waitqueue_head(&root->log_writer_wait); 11597237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[0]); 11607237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[1]); 11617237f183SYan Zheng atomic_set(&root->log_commit[0], 0); 11627237f183SYan Zheng atomic_set(&root->log_commit[1], 0); 11637237f183SYan Zheng atomic_set(&root->log_writers, 0); 11647237f183SYan Zheng root->log_batch = 0; 11657237f183SYan Zheng root->log_transid = 0; 1166257c62e1SChris Mason root->last_log_commit = 0; 1167d0c803c4SChris Mason extent_io_tree_init(&root->dirty_log_pages, 1168f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 1169017e5369SChris Mason 11703768f368SChris Mason memset(&root->root_key, 0, sizeof(root->root_key)); 11713768f368SChris Mason memset(&root->root_item, 0, sizeof(root->root_item)); 11726702ed49SChris Mason memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); 117358176a96SJosef Bacik memset(&root->root_kobj, 0, sizeof(root->root_kobj)); 11743f157a2fSChris Mason root->defrag_trans_start = fs_info->generation; 117558176a96SJosef Bacik init_completion(&root->kobj_unregister); 11766702ed49SChris Mason root->defrag_running = 0; 11774d775673SChris Mason root->root_key.objectid = objectid; 11780ee5dc67SAl Viro root->anon_dev = 0; 11793768f368SChris Mason } 11803768f368SChris Mason 1181200a5c17SJeff Mahoney static int __must_check find_and_setup_root(struct btrfs_root *tree_root, 11829f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 11839f5fae2fSChris Mason u64 objectid, 1184e20d96d6SChris Mason struct btrfs_root *root) 11853768f368SChris Mason { 11863768f368SChris Mason int ret; 1187db94535dSChris Mason u32 blocksize; 118884234f3aSYan Zheng u64 generation; 11893768f368SChris Mason 1190db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 119187ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 119287ee04ebSChris Mason root, fs_info, objectid); 11933768f368SChris Mason ret = btrfs_find_last_root(tree_root, objectid, 11943768f368SChris Mason &root->root_item, &root->root_key); 11954df27c4dSYan, Zheng if (ret > 0) 11964df27c4dSYan, Zheng return -ENOENT; 1197200a5c17SJeff Mahoney else if (ret < 0) 1198200a5c17SJeff Mahoney return ret; 11993768f368SChris Mason 120084234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1201db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1202af31f5e5SChris Mason root->commit_root = NULL; 1203db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 120484234f3aSYan Zheng blocksize, generation); 120568433b73SChris Mason if (!root->node || !btrfs_buffer_uptodate(root->node, generation)) { 120668433b73SChris Mason free_extent_buffer(root->node); 1207af31f5e5SChris Mason root->node = NULL; 120868433b73SChris Mason return -EIO; 120968433b73SChris Mason } 12104df27c4dSYan, Zheng root->commit_root = btrfs_root_node(root); 1211d97e63b6SChris Mason return 0; 1212d97e63b6SChris Mason } 1213d97e63b6SChris Mason 1214f84a8bd6SAl Viro static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info) 12156f07e42eSAl Viro { 12166f07e42eSAl Viro struct btrfs_root *root = kzalloc(sizeof(*root), GFP_NOFS); 12176f07e42eSAl Viro if (root) 12186f07e42eSAl Viro root->fs_info = fs_info; 12196f07e42eSAl Viro return root; 12206f07e42eSAl Viro } 12216f07e42eSAl Viro 12227237f183SYan Zheng static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, 1223e02119d5SChris Mason struct btrfs_fs_info *fs_info) 12240f7d52f4SChris Mason { 12250f7d52f4SChris Mason struct btrfs_root *root; 12260f7d52f4SChris Mason struct btrfs_root *tree_root = fs_info->tree_root; 12277237f183SYan Zheng struct extent_buffer *leaf; 1228e02119d5SChris Mason 12296f07e42eSAl Viro root = btrfs_alloc_root(fs_info); 1230e02119d5SChris Mason if (!root) 12317237f183SYan Zheng return ERR_PTR(-ENOMEM); 1232e02119d5SChris Mason 1233e02119d5SChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 1234e02119d5SChris Mason tree_root->sectorsize, tree_root->stripesize, 1235e02119d5SChris Mason root, fs_info, BTRFS_TREE_LOG_OBJECTID); 1236e02119d5SChris Mason 1237e02119d5SChris Mason root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 1238e02119d5SChris Mason root->root_key.type = BTRFS_ROOT_ITEM_KEY; 1239e02119d5SChris Mason root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 12407237f183SYan Zheng /* 12417237f183SYan Zheng * log trees do not get reference counted because they go away 12427237f183SYan Zheng * before a real commit is actually done. They do store pointers 12437237f183SYan Zheng * to file data extents, and those reference counts still get 12447237f183SYan Zheng * updated (along with back refs to the log tree). 12457237f183SYan Zheng */ 1246e02119d5SChris Mason root->ref_cows = 0; 1247e02119d5SChris Mason 12485d4f98a2SYan Zheng leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, 124966d7e7f0SArne Jansen BTRFS_TREE_LOG_OBJECTID, NULL, 125066d7e7f0SArne Jansen 0, 0, 0, 0); 12517237f183SYan Zheng if (IS_ERR(leaf)) { 12527237f183SYan Zheng kfree(root); 12537237f183SYan Zheng return ERR_CAST(leaf); 12547237f183SYan Zheng } 1255e02119d5SChris Mason 12565d4f98a2SYan Zheng memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 12575d4f98a2SYan Zheng btrfs_set_header_bytenr(leaf, leaf->start); 12585d4f98a2SYan Zheng btrfs_set_header_generation(leaf, trans->transid); 12595d4f98a2SYan Zheng btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 12605d4f98a2SYan Zheng btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); 12617237f183SYan Zheng root->node = leaf; 1262e02119d5SChris Mason 1263e02119d5SChris Mason write_extent_buffer(root->node, root->fs_info->fsid, 1264e02119d5SChris Mason (unsigned long)btrfs_header_fsid(root->node), 1265e02119d5SChris Mason BTRFS_FSID_SIZE); 1266e02119d5SChris Mason btrfs_mark_buffer_dirty(root->node); 1267e02119d5SChris Mason btrfs_tree_unlock(root->node); 12687237f183SYan Zheng return root; 12697237f183SYan Zheng } 12707237f183SYan Zheng 12717237f183SYan Zheng int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 12727237f183SYan Zheng struct btrfs_fs_info *fs_info) 12737237f183SYan Zheng { 12747237f183SYan Zheng struct btrfs_root *log_root; 12757237f183SYan Zheng 12767237f183SYan Zheng log_root = alloc_log_tree(trans, fs_info); 12777237f183SYan Zheng if (IS_ERR(log_root)) 12787237f183SYan Zheng return PTR_ERR(log_root); 12797237f183SYan Zheng WARN_ON(fs_info->log_root_tree); 12807237f183SYan Zheng fs_info->log_root_tree = log_root; 12817237f183SYan Zheng return 0; 12827237f183SYan Zheng } 12837237f183SYan Zheng 12847237f183SYan Zheng int btrfs_add_log_tree(struct btrfs_trans_handle *trans, 12857237f183SYan Zheng struct btrfs_root *root) 12867237f183SYan Zheng { 12877237f183SYan Zheng struct btrfs_root *log_root; 12887237f183SYan Zheng struct btrfs_inode_item *inode_item; 12897237f183SYan Zheng 12907237f183SYan Zheng log_root = alloc_log_tree(trans, root->fs_info); 12917237f183SYan Zheng if (IS_ERR(log_root)) 12927237f183SYan Zheng return PTR_ERR(log_root); 12937237f183SYan Zheng 12947237f183SYan Zheng log_root->last_trans = trans->transid; 12957237f183SYan Zheng log_root->root_key.offset = root->root_key.objectid; 12967237f183SYan Zheng 12977237f183SYan Zheng inode_item = &log_root->root_item.inode; 12987237f183SYan Zheng inode_item->generation = cpu_to_le64(1); 12997237f183SYan Zheng inode_item->size = cpu_to_le64(3); 13007237f183SYan Zheng inode_item->nlink = cpu_to_le32(1); 13017237f183SYan Zheng inode_item->nbytes = cpu_to_le64(root->leafsize); 13027237f183SYan Zheng inode_item->mode = cpu_to_le32(S_IFDIR | 0755); 13037237f183SYan Zheng 13045d4f98a2SYan Zheng btrfs_set_root_node(&log_root->root_item, log_root->node); 13057237f183SYan Zheng 13067237f183SYan Zheng WARN_ON(root->log_root); 13077237f183SYan Zheng root->log_root = log_root; 13087237f183SYan Zheng root->log_transid = 0; 1309257c62e1SChris Mason root->last_log_commit = 0; 1310e02119d5SChris Mason return 0; 1311e02119d5SChris Mason } 1312e02119d5SChris Mason 1313e02119d5SChris Mason struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, 1314e02119d5SChris Mason struct btrfs_key *location) 1315e02119d5SChris Mason { 1316e02119d5SChris Mason struct btrfs_root *root; 1317e02119d5SChris Mason struct btrfs_fs_info *fs_info = tree_root->fs_info; 13180f7d52f4SChris Mason struct btrfs_path *path; 13195f39d397SChris Mason struct extent_buffer *l; 132084234f3aSYan Zheng u64 generation; 1321db94535dSChris Mason u32 blocksize; 13220f7d52f4SChris Mason int ret = 0; 13230f7d52f4SChris Mason 13246f07e42eSAl Viro root = btrfs_alloc_root(fs_info); 13250cf6c620SChris Mason if (!root) 13260f7d52f4SChris Mason return ERR_PTR(-ENOMEM); 13270f7d52f4SChris Mason if (location->offset == (u64)-1) { 1328db94535dSChris Mason ret = find_and_setup_root(tree_root, fs_info, 13290f7d52f4SChris Mason location->objectid, root); 13300f7d52f4SChris Mason if (ret) { 13310f7d52f4SChris Mason kfree(root); 13320f7d52f4SChris Mason return ERR_PTR(ret); 13330f7d52f4SChris Mason } 133413a8a7c8SYan, Zheng goto out; 13350f7d52f4SChris Mason } 13360f7d52f4SChris Mason 1337db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 133887ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 133987ee04ebSChris Mason root, fs_info, location->objectid); 13400f7d52f4SChris Mason 13410f7d52f4SChris Mason path = btrfs_alloc_path(); 1342db5b493aSTsutomu Itoh if (!path) { 1343db5b493aSTsutomu Itoh kfree(root); 1344db5b493aSTsutomu Itoh return ERR_PTR(-ENOMEM); 1345db5b493aSTsutomu Itoh } 13460f7d52f4SChris Mason ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); 134713a8a7c8SYan, Zheng if (ret == 0) { 13485f39d397SChris Mason l = path->nodes[0]; 13495f39d397SChris Mason read_extent_buffer(l, &root->root_item, 13505f39d397SChris Mason btrfs_item_ptr_offset(l, path->slots[0]), 13510f7d52f4SChris Mason sizeof(root->root_item)); 135244b36eb2SYan Zheng memcpy(&root->root_key, location, sizeof(*location)); 135313a8a7c8SYan, Zheng } 13540f7d52f4SChris Mason btrfs_free_path(path); 13550f7d52f4SChris Mason if (ret) { 13565e540f77STsutomu Itoh kfree(root); 135713a8a7c8SYan, Zheng if (ret > 0) 135813a8a7c8SYan, Zheng ret = -ENOENT; 13590f7d52f4SChris Mason return ERR_PTR(ret); 13600f7d52f4SChris Mason } 136113a8a7c8SYan, Zheng 136284234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1363db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1364db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 136584234f3aSYan Zheng blocksize, generation); 13665d4f98a2SYan Zheng root->commit_root = btrfs_root_node(root); 136779787eaaSJeff Mahoney BUG_ON(!root->node); /* -ENOMEM */ 136813a8a7c8SYan, Zheng out: 136908fe4db1SLi Zefan if (location->objectid != BTRFS_TREE_LOG_OBJECTID) { 13700f7d52f4SChris Mason root->ref_cows = 1; 137108fe4db1SLi Zefan btrfs_check_and_init_root_item(&root->root_item); 137208fe4db1SLi Zefan } 137313a8a7c8SYan, Zheng 13745eda7b5eSChris Mason return root; 13755eda7b5eSChris Mason } 13765eda7b5eSChris Mason 1377edbd8d4eSChris Mason struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, 1378edbd8d4eSChris Mason struct btrfs_key *location) 13795eda7b5eSChris Mason { 13805eda7b5eSChris Mason struct btrfs_root *root; 13815eda7b5eSChris Mason int ret; 13825eda7b5eSChris Mason 1383edbd8d4eSChris Mason if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) 1384edbd8d4eSChris Mason return fs_info->tree_root; 1385edbd8d4eSChris Mason if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) 1386edbd8d4eSChris Mason return fs_info->extent_root; 13878f18cf13SChris Mason if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) 13888f18cf13SChris Mason return fs_info->chunk_root; 13898f18cf13SChris Mason if (location->objectid == BTRFS_DEV_TREE_OBJECTID) 13908f18cf13SChris Mason return fs_info->dev_root; 13910403e47eSYan Zheng if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) 13920403e47eSYan Zheng return fs_info->csum_root; 13934df27c4dSYan, Zheng again: 13944df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 13955eda7b5eSChris Mason root = radix_tree_lookup(&fs_info->fs_roots_radix, 13965eda7b5eSChris Mason (unsigned long)location->objectid); 13974df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 13985eda7b5eSChris Mason if (root) 13995eda7b5eSChris Mason return root; 14005eda7b5eSChris Mason 1401e02119d5SChris Mason root = btrfs_read_fs_root_no_radix(fs_info->tree_root, location); 14025eda7b5eSChris Mason if (IS_ERR(root)) 14035eda7b5eSChris Mason return root; 14043394e160SChris Mason 1405581bb050SLi Zefan root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); 1406581bb050SLi Zefan root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), 1407581bb050SLi Zefan GFP_NOFS); 140835a30d7cSDavid Sterba if (!root->free_ino_pinned || !root->free_ino_ctl) { 140935a30d7cSDavid Sterba ret = -ENOMEM; 1410581bb050SLi Zefan goto fail; 141135a30d7cSDavid Sterba } 1412581bb050SLi Zefan 1413581bb050SLi Zefan btrfs_init_free_ino_ctl(root); 1414581bb050SLi Zefan mutex_init(&root->fs_commit_mutex); 1415581bb050SLi Zefan spin_lock_init(&root->cache_lock); 1416581bb050SLi Zefan init_waitqueue_head(&root->cache_wait); 1417581bb050SLi Zefan 14180ee5dc67SAl Viro ret = get_anon_bdev(&root->anon_dev); 1419ac08aedfSChris Mason if (ret) 1420ac08aedfSChris Mason goto fail; 14213394e160SChris Mason 1422d68fc57bSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) { 1423d68fc57bSYan, Zheng ret = -ENOENT; 1424d68fc57bSYan, Zheng goto fail; 1425d68fc57bSYan, Zheng } 1426d68fc57bSYan, Zheng 1427d68fc57bSYan, Zheng ret = btrfs_find_orphan_item(fs_info->tree_root, location->objectid); 1428d68fc57bSYan, Zheng if (ret < 0) 1429d68fc57bSYan, Zheng goto fail; 1430d68fc57bSYan, Zheng if (ret == 0) 1431d68fc57bSYan, Zheng root->orphan_item_inserted = 1; 1432d68fc57bSYan, Zheng 14334df27c4dSYan, Zheng ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); 14344df27c4dSYan, Zheng if (ret) 14354df27c4dSYan, Zheng goto fail; 14364df27c4dSYan, Zheng 14374df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 14382619ba1fSChris Mason ret = radix_tree_insert(&fs_info->fs_roots_radix, 14392619ba1fSChris Mason (unsigned long)root->root_key.objectid, 14400f7d52f4SChris Mason root); 1441d68fc57bSYan, Zheng if (ret == 0) 14424df27c4dSYan, Zheng root->in_radix = 1; 1443d68fc57bSYan, Zheng 14444df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 14454df27c4dSYan, Zheng radix_tree_preload_end(); 14460f7d52f4SChris Mason if (ret) { 14474df27c4dSYan, Zheng if (ret == -EEXIST) { 14484df27c4dSYan, Zheng free_fs_root(root); 14494df27c4dSYan, Zheng goto again; 14500f7d52f4SChris Mason } 14514df27c4dSYan, Zheng goto fail; 14524df27c4dSYan, Zheng } 14534df27c4dSYan, Zheng 1454edbd8d4eSChris Mason ret = btrfs_find_dead_roots(fs_info->tree_root, 14555d4f98a2SYan Zheng root->root_key.objectid); 14564df27c4dSYan, Zheng WARN_ON(ret); 1457edbd8d4eSChris Mason return root; 14584df27c4dSYan, Zheng fail: 14594df27c4dSYan, Zheng free_fs_root(root); 14604df27c4dSYan, Zheng return ERR_PTR(ret); 1461edbd8d4eSChris Mason } 1462edbd8d4eSChris Mason 146304160088SChris Mason static int btrfs_congested_fn(void *congested_data, int bdi_bits) 146404160088SChris Mason { 146504160088SChris Mason struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; 146604160088SChris Mason int ret = 0; 146704160088SChris Mason struct btrfs_device *device; 146804160088SChris Mason struct backing_dev_info *bdi; 1469b7967db7SChris Mason 14701f78160cSXiao Guangrong rcu_read_lock(); 14711f78160cSXiao Guangrong list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { 1472dfe25020SChris Mason if (!device->bdev) 1473dfe25020SChris Mason continue; 147404160088SChris Mason bdi = blk_get_backing_dev_info(device->bdev); 147504160088SChris Mason if (bdi && bdi_congested(bdi, bdi_bits)) { 147604160088SChris Mason ret = 1; 147704160088SChris Mason break; 147804160088SChris Mason } 147904160088SChris Mason } 14801f78160cSXiao Guangrong rcu_read_unlock(); 148104160088SChris Mason return ret; 148204160088SChris Mason } 148304160088SChris Mason 148438b66988SChris Mason /* 1485ad081f14SJens Axboe * If this fails, caller must call bdi_destroy() to get rid of the 1486ad081f14SJens Axboe * bdi again. 1487ad081f14SJens Axboe */ 148804160088SChris Mason static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) 148904160088SChris Mason { 1490ad081f14SJens Axboe int err; 1491ad081f14SJens Axboe 1492ad081f14SJens Axboe bdi->capabilities = BDI_CAP_MAP_COPY; 1493e6d086d8SJens Axboe err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY); 1494ad081f14SJens Axboe if (err) 1495ad081f14SJens Axboe return err; 1496ad081f14SJens Axboe 14974575c9ccSChris Mason bdi->ra_pages = default_backing_dev_info.ra_pages; 149804160088SChris Mason bdi->congested_fn = btrfs_congested_fn; 149904160088SChris Mason bdi->congested_data = info; 150004160088SChris Mason return 0; 150104160088SChris Mason } 150204160088SChris Mason 15038b712842SChris Mason /* 15048b712842SChris Mason * called by the kthread helper functions to finally call the bio end_io 15058b712842SChris Mason * functions. This is where read checksum verification actually happens 15068b712842SChris Mason */ 15078b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work) 1508ce9adaa5SChris Mason { 1509ce9adaa5SChris Mason struct bio *bio; 15108b712842SChris Mason struct end_io_wq *end_io_wq; 15118b712842SChris Mason struct btrfs_fs_info *fs_info; 1512ce9adaa5SChris Mason int error; 1513ce9adaa5SChris Mason 15148b712842SChris Mason end_io_wq = container_of(work, struct end_io_wq, work); 1515ce9adaa5SChris Mason bio = end_io_wq->bio; 15168b712842SChris Mason fs_info = end_io_wq->info; 15178b712842SChris Mason 1518ce9adaa5SChris Mason error = end_io_wq->error; 1519ce9adaa5SChris Mason bio->bi_private = end_io_wq->private; 1520ce9adaa5SChris Mason bio->bi_end_io = end_io_wq->end_io; 1521ce9adaa5SChris Mason kfree(end_io_wq); 1522ce9adaa5SChris Mason bio_endio(bio, error); 1523ce9adaa5SChris Mason } 152444b8bd7eSChris Mason 1525a74a4b97SChris Mason static int cleaner_kthread(void *arg) 1526a74a4b97SChris Mason { 1527a74a4b97SChris Mason struct btrfs_root *root = arg; 1528a74a4b97SChris Mason 1529a74a4b97SChris Mason do { 1530a74a4b97SChris Mason vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE); 153176dda93cSYan, Zheng 153276dda93cSYan, Zheng if (!(root->fs_info->sb->s_flags & MS_RDONLY) && 153376dda93cSYan, Zheng mutex_trylock(&root->fs_info->cleaner_mutex)) { 153424bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 1535a74a4b97SChris Mason btrfs_clean_old_snapshots(root); 1536a74a4b97SChris Mason mutex_unlock(&root->fs_info->cleaner_mutex); 15374cb5300bSChris Mason btrfs_run_defrag_inodes(root->fs_info); 153876dda93cSYan, Zheng } 1539a74a4b97SChris Mason 1540a0acae0eSTejun Heo if (!try_to_freeze()) { 1541a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 15428929ecfaSYan, Zheng if (!kthread_should_stop()) 1543a74a4b97SChris Mason schedule(); 1544a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1545a74a4b97SChris Mason } 1546a74a4b97SChris Mason } while (!kthread_should_stop()); 1547a74a4b97SChris Mason return 0; 1548a74a4b97SChris Mason } 1549a74a4b97SChris Mason 1550a74a4b97SChris Mason static int transaction_kthread(void *arg) 1551a74a4b97SChris Mason { 1552a74a4b97SChris Mason struct btrfs_root *root = arg; 1553a74a4b97SChris Mason struct btrfs_trans_handle *trans; 1554a74a4b97SChris Mason struct btrfs_transaction *cur; 15558929ecfaSYan, Zheng u64 transid; 1556a74a4b97SChris Mason unsigned long now; 1557a74a4b97SChris Mason unsigned long delay; 1558914b2007SJan Kara bool cannot_commit; 1559a74a4b97SChris Mason 1560a74a4b97SChris Mason do { 1561914b2007SJan Kara cannot_commit = false; 1562a74a4b97SChris Mason delay = HZ * 30; 1563a74a4b97SChris Mason vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE); 1564a74a4b97SChris Mason mutex_lock(&root->fs_info->transaction_kthread_mutex); 1565a74a4b97SChris Mason 1566a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 1567a74a4b97SChris Mason cur = root->fs_info->running_transaction; 1568a74a4b97SChris Mason if (!cur) { 1569a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1570a74a4b97SChris Mason goto sleep; 1571a74a4b97SChris Mason } 157231153d81SYan Zheng 1573a74a4b97SChris Mason now = get_seconds(); 15748929ecfaSYan, Zheng if (!cur->blocked && 15758929ecfaSYan, Zheng (now < cur->start_time || now - cur->start_time < 30)) { 1576a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1577a74a4b97SChris Mason delay = HZ * 5; 1578a74a4b97SChris Mason goto sleep; 1579a74a4b97SChris Mason } 15808929ecfaSYan, Zheng transid = cur->transid; 1581a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 158256bec294SChris Mason 158379787eaaSJeff Mahoney /* If the file system is aborted, this will always fail. */ 15847a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 1585914b2007SJan Kara if (IS_ERR(trans)) { 1586914b2007SJan Kara cannot_commit = true; 158779787eaaSJeff Mahoney goto sleep; 1588914b2007SJan Kara } 15898929ecfaSYan, Zheng if (transid == trans->transid) { 159079787eaaSJeff Mahoney btrfs_commit_transaction(trans, root); 15918929ecfaSYan, Zheng } else { 15928929ecfaSYan, Zheng btrfs_end_transaction(trans, root); 15938929ecfaSYan, Zheng } 1594a74a4b97SChris Mason sleep: 1595a74a4b97SChris Mason wake_up_process(root->fs_info->cleaner_kthread); 1596a74a4b97SChris Mason mutex_unlock(&root->fs_info->transaction_kthread_mutex); 1597a74a4b97SChris Mason 1598a0acae0eSTejun Heo if (!try_to_freeze()) { 1599a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 16008929ecfaSYan, Zheng if (!kthread_should_stop() && 1601914b2007SJan Kara (!btrfs_transaction_blocked(root->fs_info) || 1602914b2007SJan Kara cannot_commit)) 1603a74a4b97SChris Mason schedule_timeout(delay); 1604a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1605a74a4b97SChris Mason } 1606a74a4b97SChris Mason } while (!kthread_should_stop()); 1607a74a4b97SChris Mason return 0; 1608a74a4b97SChris Mason } 1609a74a4b97SChris Mason 1610af31f5e5SChris Mason /* 1611af31f5e5SChris Mason * this will find the highest generation in the array of 1612af31f5e5SChris Mason * root backups. The index of the highest array is returned, 1613af31f5e5SChris Mason * or -1 if we can't find anything. 1614af31f5e5SChris Mason * 1615af31f5e5SChris Mason * We check to make sure the array is valid by comparing the 1616af31f5e5SChris Mason * generation of the latest root in the array with the generation 1617af31f5e5SChris Mason * in the super block. If they don't match we pitch it. 1618af31f5e5SChris Mason */ 1619af31f5e5SChris Mason static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) 1620af31f5e5SChris Mason { 1621af31f5e5SChris Mason u64 cur; 1622af31f5e5SChris Mason int newest_index = -1; 1623af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1624af31f5e5SChris Mason int i; 1625af31f5e5SChris Mason 1626af31f5e5SChris Mason for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 1627af31f5e5SChris Mason root_backup = info->super_copy->super_roots + i; 1628af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1629af31f5e5SChris Mason if (cur == newest_gen) 1630af31f5e5SChris Mason newest_index = i; 1631af31f5e5SChris Mason } 1632af31f5e5SChris Mason 1633af31f5e5SChris Mason /* check to see if we actually wrapped around */ 1634af31f5e5SChris Mason if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { 1635af31f5e5SChris Mason root_backup = info->super_copy->super_roots; 1636af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1637af31f5e5SChris Mason if (cur == newest_gen) 1638af31f5e5SChris Mason newest_index = 0; 1639af31f5e5SChris Mason } 1640af31f5e5SChris Mason return newest_index; 1641af31f5e5SChris Mason } 1642af31f5e5SChris Mason 1643af31f5e5SChris Mason 1644af31f5e5SChris Mason /* 1645af31f5e5SChris Mason * find the oldest backup so we know where to store new entries 1646af31f5e5SChris Mason * in the backup array. This will set the backup_root_index 1647af31f5e5SChris Mason * field in the fs_info struct 1648af31f5e5SChris Mason */ 1649af31f5e5SChris Mason static void find_oldest_super_backup(struct btrfs_fs_info *info, 1650af31f5e5SChris Mason u64 newest_gen) 1651af31f5e5SChris Mason { 1652af31f5e5SChris Mason int newest_index = -1; 1653af31f5e5SChris Mason 1654af31f5e5SChris Mason newest_index = find_newest_super_backup(info, newest_gen); 1655af31f5e5SChris Mason /* if there was garbage in there, just move along */ 1656af31f5e5SChris Mason if (newest_index == -1) { 1657af31f5e5SChris Mason info->backup_root_index = 0; 1658af31f5e5SChris Mason } else { 1659af31f5e5SChris Mason info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; 1660af31f5e5SChris Mason } 1661af31f5e5SChris Mason } 1662af31f5e5SChris Mason 1663af31f5e5SChris Mason /* 1664af31f5e5SChris Mason * copy all the root pointers into the super backup array. 1665af31f5e5SChris Mason * this will bump the backup pointer by one when it is 1666af31f5e5SChris Mason * done 1667af31f5e5SChris Mason */ 1668af31f5e5SChris Mason static void backup_super_roots(struct btrfs_fs_info *info) 1669af31f5e5SChris Mason { 1670af31f5e5SChris Mason int next_backup; 1671af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1672af31f5e5SChris Mason int last_backup; 1673af31f5e5SChris Mason 1674af31f5e5SChris Mason next_backup = info->backup_root_index; 1675af31f5e5SChris Mason last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % 1676af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1677af31f5e5SChris Mason 1678af31f5e5SChris Mason /* 1679af31f5e5SChris Mason * just overwrite the last backup if we're at the same generation 1680af31f5e5SChris Mason * this happens only at umount 1681af31f5e5SChris Mason */ 1682af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + last_backup; 1683af31f5e5SChris Mason if (btrfs_backup_tree_root_gen(root_backup) == 1684af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)) 1685af31f5e5SChris Mason next_backup = last_backup; 1686af31f5e5SChris Mason 1687af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + next_backup; 1688af31f5e5SChris Mason 1689af31f5e5SChris Mason /* 1690af31f5e5SChris Mason * make sure all of our padding and empty slots get zero filled 1691af31f5e5SChris Mason * regardless of which ones we use today 1692af31f5e5SChris Mason */ 1693af31f5e5SChris Mason memset(root_backup, 0, sizeof(*root_backup)); 1694af31f5e5SChris Mason 1695af31f5e5SChris Mason info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; 1696af31f5e5SChris Mason 1697af31f5e5SChris Mason btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); 1698af31f5e5SChris Mason btrfs_set_backup_tree_root_gen(root_backup, 1699af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)); 1700af31f5e5SChris Mason 1701af31f5e5SChris Mason btrfs_set_backup_tree_root_level(root_backup, 1702af31f5e5SChris Mason btrfs_header_level(info->tree_root->node)); 1703af31f5e5SChris Mason 1704af31f5e5SChris Mason btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); 1705af31f5e5SChris Mason btrfs_set_backup_chunk_root_gen(root_backup, 1706af31f5e5SChris Mason btrfs_header_generation(info->chunk_root->node)); 1707af31f5e5SChris Mason btrfs_set_backup_chunk_root_level(root_backup, 1708af31f5e5SChris Mason btrfs_header_level(info->chunk_root->node)); 1709af31f5e5SChris Mason 1710af31f5e5SChris Mason btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); 1711af31f5e5SChris Mason btrfs_set_backup_extent_root_gen(root_backup, 1712af31f5e5SChris Mason btrfs_header_generation(info->extent_root->node)); 1713af31f5e5SChris Mason btrfs_set_backup_extent_root_level(root_backup, 1714af31f5e5SChris Mason btrfs_header_level(info->extent_root->node)); 1715af31f5e5SChris Mason 17167c7e82a7SChris Mason /* 17177c7e82a7SChris Mason * we might commit during log recovery, which happens before we set 17187c7e82a7SChris Mason * the fs_root. Make sure it is valid before we fill it in. 17197c7e82a7SChris Mason */ 17207c7e82a7SChris Mason if (info->fs_root && info->fs_root->node) { 17217c7e82a7SChris Mason btrfs_set_backup_fs_root(root_backup, 17227c7e82a7SChris Mason info->fs_root->node->start); 1723af31f5e5SChris Mason btrfs_set_backup_fs_root_gen(root_backup, 1724af31f5e5SChris Mason btrfs_header_generation(info->fs_root->node)); 1725af31f5e5SChris Mason btrfs_set_backup_fs_root_level(root_backup, 1726af31f5e5SChris Mason btrfs_header_level(info->fs_root->node)); 17277c7e82a7SChris Mason } 1728af31f5e5SChris Mason 1729af31f5e5SChris Mason btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); 1730af31f5e5SChris Mason btrfs_set_backup_dev_root_gen(root_backup, 1731af31f5e5SChris Mason btrfs_header_generation(info->dev_root->node)); 1732af31f5e5SChris Mason btrfs_set_backup_dev_root_level(root_backup, 1733af31f5e5SChris Mason btrfs_header_level(info->dev_root->node)); 1734af31f5e5SChris Mason 1735af31f5e5SChris Mason btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); 1736af31f5e5SChris Mason btrfs_set_backup_csum_root_gen(root_backup, 1737af31f5e5SChris Mason btrfs_header_generation(info->csum_root->node)); 1738af31f5e5SChris Mason btrfs_set_backup_csum_root_level(root_backup, 1739af31f5e5SChris Mason btrfs_header_level(info->csum_root->node)); 1740af31f5e5SChris Mason 1741af31f5e5SChris Mason btrfs_set_backup_total_bytes(root_backup, 1742af31f5e5SChris Mason btrfs_super_total_bytes(info->super_copy)); 1743af31f5e5SChris Mason btrfs_set_backup_bytes_used(root_backup, 1744af31f5e5SChris Mason btrfs_super_bytes_used(info->super_copy)); 1745af31f5e5SChris Mason btrfs_set_backup_num_devices(root_backup, 1746af31f5e5SChris Mason btrfs_super_num_devices(info->super_copy)); 1747af31f5e5SChris Mason 1748af31f5e5SChris Mason /* 1749af31f5e5SChris Mason * if we don't copy this out to the super_copy, it won't get remembered 1750af31f5e5SChris Mason * for the next commit 1751af31f5e5SChris Mason */ 1752af31f5e5SChris Mason memcpy(&info->super_copy->super_roots, 1753af31f5e5SChris Mason &info->super_for_commit->super_roots, 1754af31f5e5SChris Mason sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); 1755af31f5e5SChris Mason } 1756af31f5e5SChris Mason 1757af31f5e5SChris Mason /* 1758af31f5e5SChris Mason * this copies info out of the root backup array and back into 1759af31f5e5SChris Mason * the in-memory super block. It is meant to help iterate through 1760af31f5e5SChris Mason * the array, so you send it the number of backups you've already 1761af31f5e5SChris Mason * tried and the last backup index you used. 1762af31f5e5SChris Mason * 1763af31f5e5SChris Mason * this returns -1 when it has tried all the backups 1764af31f5e5SChris Mason */ 1765af31f5e5SChris Mason static noinline int next_root_backup(struct btrfs_fs_info *info, 1766af31f5e5SChris Mason struct btrfs_super_block *super, 1767af31f5e5SChris Mason int *num_backups_tried, int *backup_index) 1768af31f5e5SChris Mason { 1769af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1770af31f5e5SChris Mason int newest = *backup_index; 1771af31f5e5SChris Mason 1772af31f5e5SChris Mason if (*num_backups_tried == 0) { 1773af31f5e5SChris Mason u64 gen = btrfs_super_generation(super); 1774af31f5e5SChris Mason 1775af31f5e5SChris Mason newest = find_newest_super_backup(info, gen); 1776af31f5e5SChris Mason if (newest == -1) 1777af31f5e5SChris Mason return -1; 1778af31f5e5SChris Mason 1779af31f5e5SChris Mason *backup_index = newest; 1780af31f5e5SChris Mason *num_backups_tried = 1; 1781af31f5e5SChris Mason } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { 1782af31f5e5SChris Mason /* we've tried all the backups, all done */ 1783af31f5e5SChris Mason return -1; 1784af31f5e5SChris Mason } else { 1785af31f5e5SChris Mason /* jump to the next oldest backup */ 1786af31f5e5SChris Mason newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % 1787af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1788af31f5e5SChris Mason *backup_index = newest; 1789af31f5e5SChris Mason *num_backups_tried += 1; 1790af31f5e5SChris Mason } 1791af31f5e5SChris Mason root_backup = super->super_roots + newest; 1792af31f5e5SChris Mason 1793af31f5e5SChris Mason btrfs_set_super_generation(super, 1794af31f5e5SChris Mason btrfs_backup_tree_root_gen(root_backup)); 1795af31f5e5SChris Mason btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); 1796af31f5e5SChris Mason btrfs_set_super_root_level(super, 1797af31f5e5SChris Mason btrfs_backup_tree_root_level(root_backup)); 1798af31f5e5SChris Mason btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); 1799af31f5e5SChris Mason 1800af31f5e5SChris Mason /* 1801af31f5e5SChris Mason * fixme: the total bytes and num_devices need to match or we should 1802af31f5e5SChris Mason * need a fsck 1803af31f5e5SChris Mason */ 1804af31f5e5SChris Mason btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); 1805af31f5e5SChris Mason btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); 1806af31f5e5SChris Mason return 0; 1807af31f5e5SChris Mason } 1808af31f5e5SChris Mason 1809af31f5e5SChris Mason /* helper to cleanup tree roots */ 1810af31f5e5SChris Mason static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) 1811af31f5e5SChris Mason { 1812af31f5e5SChris Mason free_extent_buffer(info->tree_root->node); 1813af31f5e5SChris Mason free_extent_buffer(info->tree_root->commit_root); 1814af31f5e5SChris Mason free_extent_buffer(info->dev_root->node); 1815af31f5e5SChris Mason free_extent_buffer(info->dev_root->commit_root); 1816af31f5e5SChris Mason free_extent_buffer(info->extent_root->node); 1817af31f5e5SChris Mason free_extent_buffer(info->extent_root->commit_root); 1818af31f5e5SChris Mason free_extent_buffer(info->csum_root->node); 1819af31f5e5SChris Mason free_extent_buffer(info->csum_root->commit_root); 1820af31f5e5SChris Mason 1821af31f5e5SChris Mason info->tree_root->node = NULL; 1822af31f5e5SChris Mason info->tree_root->commit_root = NULL; 1823af31f5e5SChris Mason info->dev_root->node = NULL; 1824af31f5e5SChris Mason info->dev_root->commit_root = NULL; 1825af31f5e5SChris Mason info->extent_root->node = NULL; 1826af31f5e5SChris Mason info->extent_root->commit_root = NULL; 1827af31f5e5SChris Mason info->csum_root->node = NULL; 1828af31f5e5SChris Mason info->csum_root->commit_root = NULL; 1829af31f5e5SChris Mason 1830af31f5e5SChris Mason if (chunk_root) { 1831af31f5e5SChris Mason free_extent_buffer(info->chunk_root->node); 1832af31f5e5SChris Mason free_extent_buffer(info->chunk_root->commit_root); 1833af31f5e5SChris Mason info->chunk_root->node = NULL; 1834af31f5e5SChris Mason info->chunk_root->commit_root = NULL; 1835af31f5e5SChris Mason } 1836af31f5e5SChris Mason } 1837af31f5e5SChris Mason 1838af31f5e5SChris Mason 1839ad2b2c80SAl Viro int open_ctree(struct super_block *sb, 1840dfe25020SChris Mason struct btrfs_fs_devices *fs_devices, 1841dfe25020SChris Mason char *options) 1842eb60ceacSChris Mason { 1843db94535dSChris Mason u32 sectorsize; 1844db94535dSChris Mason u32 nodesize; 1845db94535dSChris Mason u32 leafsize; 1846db94535dSChris Mason u32 blocksize; 184787ee04ebSChris Mason u32 stripesize; 184884234f3aSYan Zheng u64 generation; 1849f2b636e8SJosef Bacik u64 features; 18503de4586cSChris Mason struct btrfs_key location; 1851a061fc8dSChris Mason struct buffer_head *bh; 18524d34b278SIlya Dryomov struct btrfs_super_block *disk_super; 1853815745cfSAl Viro struct btrfs_fs_info *fs_info = btrfs_sb(sb); 1854f84a8bd6SAl Viro struct btrfs_root *tree_root; 18554d34b278SIlya Dryomov struct btrfs_root *extent_root; 18564d34b278SIlya Dryomov struct btrfs_root *csum_root; 18574d34b278SIlya Dryomov struct btrfs_root *chunk_root; 18584d34b278SIlya Dryomov struct btrfs_root *dev_root; 1859e02119d5SChris Mason struct btrfs_root *log_tree_root; 1860eb60ceacSChris Mason int ret; 1861e58ca020SYan int err = -EINVAL; 1862af31f5e5SChris Mason int num_backups_tried = 0; 1863af31f5e5SChris Mason int backup_index = 0; 18644543df7eSChris Mason 1865f84a8bd6SAl Viro tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info); 18666f07e42eSAl Viro extent_root = fs_info->extent_root = btrfs_alloc_root(fs_info); 18676f07e42eSAl Viro csum_root = fs_info->csum_root = btrfs_alloc_root(fs_info); 18686f07e42eSAl Viro chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info); 18696f07e42eSAl Viro dev_root = fs_info->dev_root = btrfs_alloc_root(fs_info); 18708790d502SChris Mason 1871f84a8bd6SAl Viro if (!tree_root || !extent_root || !csum_root || 1872f84a8bd6SAl Viro !chunk_root || !dev_root) { 187339279cc3SChris Mason err = -ENOMEM; 187439279cc3SChris Mason goto fail; 187539279cc3SChris Mason } 187676dda93cSYan, Zheng 187776dda93cSYan, Zheng ret = init_srcu_struct(&fs_info->subvol_srcu); 187876dda93cSYan, Zheng if (ret) { 187976dda93cSYan, Zheng err = ret; 188076dda93cSYan, Zheng goto fail; 188176dda93cSYan, Zheng } 188276dda93cSYan, Zheng 188376dda93cSYan, Zheng ret = setup_bdi(fs_info, &fs_info->bdi); 188476dda93cSYan, Zheng if (ret) { 188576dda93cSYan, Zheng err = ret; 188676dda93cSYan, Zheng goto fail_srcu; 188776dda93cSYan, Zheng } 188876dda93cSYan, Zheng 188976dda93cSYan, Zheng fs_info->btree_inode = new_inode(sb); 189076dda93cSYan, Zheng if (!fs_info->btree_inode) { 189176dda93cSYan, Zheng err = -ENOMEM; 189276dda93cSYan, Zheng goto fail_bdi; 189376dda93cSYan, Zheng } 189476dda93cSYan, Zheng 1895a6591715SChris Mason mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); 18961561dedaSMiao Xie 189776dda93cSYan, Zheng INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 18988fd17795SChris Mason INIT_LIST_HEAD(&fs_info->trans_list); 1899facda1e7SChris Mason INIT_LIST_HEAD(&fs_info->dead_roots); 190024bbcf04SYan, Zheng INIT_LIST_HEAD(&fs_info->delayed_iputs); 190119c00ddcSChris Mason INIT_LIST_HEAD(&fs_info->hashers); 1902ea8c2819SChris Mason INIT_LIST_HEAD(&fs_info->delalloc_inodes); 19035a3f23d5SChris Mason INIT_LIST_HEAD(&fs_info->ordered_operations); 190411833d66SYan Zheng INIT_LIST_HEAD(&fs_info->caching_block_groups); 19051832a6d5SChris Mason spin_lock_init(&fs_info->delalloc_lock); 1906a4abeea4SJosef Bacik spin_lock_init(&fs_info->trans_lock); 190731153d81SYan Zheng spin_lock_init(&fs_info->ref_cache_lock); 190876dda93cSYan, Zheng spin_lock_init(&fs_info->fs_roots_radix_lock); 190924bbcf04SYan, Zheng spin_lock_init(&fs_info->delayed_iput_lock); 19104cb5300bSChris Mason spin_lock_init(&fs_info->defrag_inodes_lock); 19112bf64758SJosef Bacik spin_lock_init(&fs_info->free_chunk_lock); 19127585717fSChris Mason mutex_init(&fs_info->reloc_mutex); 191319c00ddcSChris Mason 191458176a96SJosef Bacik init_completion(&fs_info->kobj_unregister); 19150b86a832SChris Mason INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); 19166324fbf3SChris Mason INIT_LIST_HEAD(&fs_info->space_info); 19170b86a832SChris Mason btrfs_mapping_init(&fs_info->mapping_tree); 1918f0486c68SYan, Zheng btrfs_init_block_rsv(&fs_info->global_block_rsv); 1919f0486c68SYan, Zheng btrfs_init_block_rsv(&fs_info->delalloc_block_rsv); 1920f0486c68SYan, Zheng btrfs_init_block_rsv(&fs_info->trans_block_rsv); 1921f0486c68SYan, Zheng btrfs_init_block_rsv(&fs_info->chunk_block_rsv); 1922f0486c68SYan, Zheng btrfs_init_block_rsv(&fs_info->empty_block_rsv); 19236d668ddaSJosef Bacik btrfs_init_block_rsv(&fs_info->delayed_block_rsv); 1924cb03c743SChris Mason atomic_set(&fs_info->nr_async_submits, 0); 1925771ed689SChris Mason atomic_set(&fs_info->async_delalloc_pages, 0); 19268c8bee1dSChris Mason atomic_set(&fs_info->async_submit_draining, 0); 19270986fe9eSChris Mason atomic_set(&fs_info->nr_async_bios, 0); 19284cb5300bSChris Mason atomic_set(&fs_info->defrag_running, 0); 1929e20d96d6SChris Mason fs_info->sb = sb; 19306f568d35SChris Mason fs_info->max_inline = 8192 * 1024; 19319ed74f2dSJosef Bacik fs_info->metadata_ratio = 0; 19324cb5300bSChris Mason fs_info->defrag_inodes = RB_ROOT; 1933a4abeea4SJosef Bacik fs_info->trans_no_join = 0; 19342bf64758SJosef Bacik fs_info->free_chunk_space = 0; 1935c8b97818SChris Mason 193690519d66SArne Jansen /* readahead state */ 193790519d66SArne Jansen INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT); 193890519d66SArne Jansen spin_lock_init(&fs_info->reada_lock); 19392c90e5d6SChris Mason 1940b34b086cSChris Mason fs_info->thread_pool_size = min_t(unsigned long, 1941b34b086cSChris Mason num_online_cpus() + 2, 8); 19420afbaf8cSChris Mason 19433eaa2885SChris Mason INIT_LIST_HEAD(&fs_info->ordered_extents); 19443eaa2885SChris Mason spin_lock_init(&fs_info->ordered_extent_lock); 194516cdcec7SMiao Xie fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), 194616cdcec7SMiao Xie GFP_NOFS); 194716cdcec7SMiao Xie if (!fs_info->delayed_root) { 194816cdcec7SMiao Xie err = -ENOMEM; 194916cdcec7SMiao Xie goto fail_iput; 195016cdcec7SMiao Xie } 195116cdcec7SMiao Xie btrfs_init_delayed_root(fs_info->delayed_root); 19523eaa2885SChris Mason 1953a2de733cSArne Jansen mutex_init(&fs_info->scrub_lock); 1954a2de733cSArne Jansen atomic_set(&fs_info->scrubs_running, 0); 1955a2de733cSArne Jansen atomic_set(&fs_info->scrub_pause_req, 0); 1956a2de733cSArne Jansen atomic_set(&fs_info->scrubs_paused, 0); 1957a2de733cSArne Jansen atomic_set(&fs_info->scrub_cancel_req, 0); 1958a2de733cSArne Jansen init_waitqueue_head(&fs_info->scrub_pause_wait); 1959a2de733cSArne Jansen init_rwsem(&fs_info->scrub_super_lock); 1960a2de733cSArne Jansen fs_info->scrub_workers_refcnt = 0; 196121adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 196221adbd5cSStefan Behrens fs_info->check_integrity_print_mask = 0; 196321adbd5cSStefan Behrens #endif 1964a2de733cSArne Jansen 1965c9e9f97bSIlya Dryomov spin_lock_init(&fs_info->balance_lock); 1966c9e9f97bSIlya Dryomov mutex_init(&fs_info->balance_mutex); 1967837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_running, 0); 1968837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_pause_req, 0); 1969a7e99c69SIlya Dryomov atomic_set(&fs_info->balance_cancel_req, 0); 1970c9e9f97bSIlya Dryomov fs_info->balance_ctl = NULL; 1971837d5b6eSIlya Dryomov init_waitqueue_head(&fs_info->balance_wait_q); 1972a061fc8dSChris Mason 19730afbaf8cSChris Mason sb->s_blocksize = 4096; 19740afbaf8cSChris Mason sb->s_blocksize_bits = blksize_bits(4096); 197532a88aa1SJens Axboe sb->s_bdi = &fs_info->bdi; 19760afbaf8cSChris Mason 197776dda93cSYan, Zheng fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; 1978bfe86848SMiklos Szeredi set_nlink(fs_info->btree_inode, 1); 19790afbaf8cSChris Mason /* 19800afbaf8cSChris Mason * we set the i_size on the btree inode to the max possible int. 19810afbaf8cSChris Mason * the real end of the address space is determined by all of 19820afbaf8cSChris Mason * the devices in the system 19830afbaf8cSChris Mason */ 19840afbaf8cSChris Mason fs_info->btree_inode->i_size = OFFSET_MAX; 1985d98237b3SChris Mason fs_info->btree_inode->i_mapping->a_ops = &btree_aops; 198604160088SChris Mason fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; 198704160088SChris Mason 19885d4f98a2SYan Zheng RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); 1989d1310b2eSChris Mason extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, 1990f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 19910b32f4bbSJosef Bacik BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; 1992a8067e02SDavid Sterba extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); 19930da5468fSChris Mason 1994d1310b2eSChris Mason BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; 1995d1310b2eSChris Mason 19960f7d52f4SChris Mason BTRFS_I(fs_info->btree_inode)->root = tree_root; 19970f7d52f4SChris Mason memset(&BTRFS_I(fs_info->btree_inode)->location, 0, 19980f7d52f4SChris Mason sizeof(struct btrfs_key)); 199976dda93cSYan, Zheng BTRFS_I(fs_info->btree_inode)->dummy_inode = 1; 200022b0ebdaSChris Mason insert_inode_hash(fs_info->btree_inode); 200139279cc3SChris Mason 2002e02119d5SChris Mason spin_lock_init(&fs_info->block_group_cache_lock); 20036bef4d31SEric Paris fs_info->block_group_cache_tree = RB_ROOT; 2004925baeddSChris Mason 200511833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[0], 2006f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 200711833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[1], 2008f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 200911833d66SYan Zheng fs_info->pinned_extents = &fs_info->freed_extents[0]; 2010e6dcd2dcSChris Mason fs_info->do_barriers = 1; 2011f9295749SChris Mason 2012d98237b3SChris Mason 20135a3f23d5SChris Mason mutex_init(&fs_info->ordered_operations_mutex); 201430ae8467SChris Mason mutex_init(&fs_info->tree_log_mutex); 2015925baeddSChris Mason mutex_init(&fs_info->chunk_mutex); 2016925baeddSChris Mason mutex_init(&fs_info->transaction_kthread_mutex); 2017a74a4b97SChris Mason mutex_init(&fs_info->cleaner_mutex); 2018a74a4b97SChris Mason mutex_init(&fs_info->volume_mutex); 2019276e680dSYan Zheng init_rwsem(&fs_info->extent_commit_sem); 2020c71bf099SYan, Zheng init_rwsem(&fs_info->cleanup_work_sem); 202176dda93cSYan, Zheng init_rwsem(&fs_info->subvol_sem); 2022fa9c0d79SChris Mason 2023fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); 2024fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->data_alloc_cluster); 2025fa9c0d79SChris Mason 20267d9eb12cSChris Mason init_waitqueue_head(&fs_info->transaction_throttle); 20273768f368SChris Mason init_waitqueue_head(&fs_info->transaction_wait); 2028bb9c12c9SSage Weil init_waitqueue_head(&fs_info->transaction_blocked_wait); 20294854ddd0SChris Mason init_waitqueue_head(&fs_info->async_submit_wait); 20309a8dd150SChris Mason 20310b86a832SChris Mason __setup_root(4096, 4096, 4096, 4096, tree_root, 20322c90e5d6SChris Mason fs_info, BTRFS_ROOT_TREE_OBJECTID); 20337eccb903SChris Mason 20343c4bb26bSChris Mason invalidate_bdev(fs_devices->latest_bdev); 2035a512bbf8SYan Zheng bh = btrfs_read_dev_super(fs_devices->latest_bdev); 203620b45077SDave Young if (!bh) { 203720b45077SDave Young err = -EINVAL; 203816cdcec7SMiao Xie goto fail_alloc; 203920b45077SDave Young } 204039279cc3SChris Mason 20416c41761fSDavid Sterba memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); 20426c41761fSDavid Sterba memcpy(fs_info->super_for_commit, fs_info->super_copy, 20436c41761fSDavid Sterba sizeof(*fs_info->super_for_commit)); 2044a061fc8dSChris Mason brelse(bh); 20455f39d397SChris Mason 20466c41761fSDavid Sterba memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); 20470b86a832SChris Mason 20486c41761fSDavid Sterba disk_super = fs_info->super_copy; 20490f7d52f4SChris Mason if (!btrfs_super_root(disk_super)) 205016cdcec7SMiao Xie goto fail_alloc; 20510f7d52f4SChris Mason 2052acce952bSliubo /* check FS state, whether FS is broken. */ 2053acce952bSliubo fs_info->fs_state |= btrfs_super_flags(disk_super); 2054acce952bSliubo 2055fcd1f065SDavid Sterba ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); 2056fcd1f065SDavid Sterba if (ret) { 2057fcd1f065SDavid Sterba printk(KERN_ERR "btrfs: superblock contains fatal errors\n"); 2058fcd1f065SDavid Sterba err = ret; 2059fcd1f065SDavid Sterba goto fail_alloc; 2060fcd1f065SDavid Sterba } 2061acce952bSliubo 206275e7cb7fSLiu Bo /* 2063af31f5e5SChris Mason * run through our array of backup supers and setup 2064af31f5e5SChris Mason * our ring pointer to the oldest one 2065af31f5e5SChris Mason */ 2066af31f5e5SChris Mason generation = btrfs_super_generation(disk_super); 2067af31f5e5SChris Mason find_oldest_super_backup(fs_info, generation); 2068af31f5e5SChris Mason 2069af31f5e5SChris Mason /* 207075e7cb7fSLiu Bo * In the long term, we'll store the compression type in the super 207175e7cb7fSLiu Bo * block, and it'll be used for per file compression control. 207275e7cb7fSLiu Bo */ 207375e7cb7fSLiu Bo fs_info->compress_type = BTRFS_COMPRESS_ZLIB; 207475e7cb7fSLiu Bo 20752b82032cSYan Zheng ret = btrfs_parse_options(tree_root, options); 20762b82032cSYan Zheng if (ret) { 20772b82032cSYan Zheng err = ret; 207816cdcec7SMiao Xie goto fail_alloc; 20792b82032cSYan Zheng } 2080dfe25020SChris Mason 2081f2b636e8SJosef Bacik features = btrfs_super_incompat_flags(disk_super) & 2082f2b636e8SJosef Bacik ~BTRFS_FEATURE_INCOMPAT_SUPP; 2083f2b636e8SJosef Bacik if (features) { 2084f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount because of " 2085f2b636e8SJosef Bacik "unsupported optional features (%Lx).\n", 208621380931SJoel Becker (unsigned long long)features); 2087f2b636e8SJosef Bacik err = -EINVAL; 208816cdcec7SMiao Xie goto fail_alloc; 2089f2b636e8SJosef Bacik } 2090f2b636e8SJosef Bacik 2091727011e0SChris Mason if (btrfs_super_leafsize(disk_super) != 2092727011e0SChris Mason btrfs_super_nodesize(disk_super)) { 2093727011e0SChris Mason printk(KERN_ERR "BTRFS: couldn't mount because metadata " 2094727011e0SChris Mason "blocksizes don't match. node %d leaf %d\n", 2095727011e0SChris Mason btrfs_super_nodesize(disk_super), 2096727011e0SChris Mason btrfs_super_leafsize(disk_super)); 2097727011e0SChris Mason err = -EINVAL; 2098727011e0SChris Mason goto fail_alloc; 2099727011e0SChris Mason } 2100727011e0SChris Mason if (btrfs_super_leafsize(disk_super) > BTRFS_MAX_METADATA_BLOCKSIZE) { 2101727011e0SChris Mason printk(KERN_ERR "BTRFS: couldn't mount because metadata " 2102727011e0SChris Mason "blocksize (%d) was too large\n", 2103727011e0SChris Mason btrfs_super_leafsize(disk_super)); 2104727011e0SChris Mason err = -EINVAL; 2105727011e0SChris Mason goto fail_alloc; 2106727011e0SChris Mason } 2107727011e0SChris Mason 21085d4f98a2SYan Zheng features = btrfs_super_incompat_flags(disk_super); 21095d4f98a2SYan Zheng features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; 2110a6fa6faeSLi Zefan if (tree_root->fs_info->compress_type & BTRFS_COMPRESS_LZO) 2111a6fa6faeSLi Zefan features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; 2112727011e0SChris Mason 2113727011e0SChris Mason /* 2114727011e0SChris Mason * flag our filesystem as having big metadata blocks if 2115727011e0SChris Mason * they are bigger than the page size 2116727011e0SChris Mason */ 2117727011e0SChris Mason if (btrfs_super_leafsize(disk_super) > PAGE_CACHE_SIZE) { 2118727011e0SChris Mason if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) 2119727011e0SChris Mason printk(KERN_INFO "btrfs flagging fs with big metadata feature\n"); 2120727011e0SChris Mason features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; 2121727011e0SChris Mason } 2122727011e0SChris Mason 2123bc3f116fSChris Mason nodesize = btrfs_super_nodesize(disk_super); 2124bc3f116fSChris Mason leafsize = btrfs_super_leafsize(disk_super); 2125bc3f116fSChris Mason sectorsize = btrfs_super_sectorsize(disk_super); 2126bc3f116fSChris Mason stripesize = btrfs_super_stripesize(disk_super); 2127bc3f116fSChris Mason 2128bc3f116fSChris Mason /* 2129bc3f116fSChris Mason * mixed block groups end up with duplicate but slightly offset 2130bc3f116fSChris Mason * extent buffers for the same range. It leads to corruptions 2131bc3f116fSChris Mason */ 2132bc3f116fSChris Mason if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && 2133bc3f116fSChris Mason (sectorsize != leafsize)) { 2134bc3f116fSChris Mason printk(KERN_WARNING "btrfs: unequal leaf/node/sector sizes " 2135bc3f116fSChris Mason "are not allowed for mixed block groups on %s\n", 2136bc3f116fSChris Mason sb->s_id); 2137bc3f116fSChris Mason goto fail_alloc; 2138bc3f116fSChris Mason } 2139bc3f116fSChris Mason 21405d4f98a2SYan Zheng btrfs_set_super_incompat_flags(disk_super, features); 21415d4f98a2SYan Zheng 2142f2b636e8SJosef Bacik features = btrfs_super_compat_ro_flags(disk_super) & 2143f2b636e8SJosef Bacik ~BTRFS_FEATURE_COMPAT_RO_SUPP; 2144f2b636e8SJosef Bacik if (!(sb->s_flags & MS_RDONLY) && features) { 2145f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount RDWR because of " 2146f2b636e8SJosef Bacik "unsupported option features (%Lx).\n", 214721380931SJoel Becker (unsigned long long)features); 2148f2b636e8SJosef Bacik err = -EINVAL; 214916cdcec7SMiao Xie goto fail_alloc; 2150f2b636e8SJosef Bacik } 215161d92c32SChris Mason 215261d92c32SChris Mason btrfs_init_workers(&fs_info->generic_worker, 215361d92c32SChris Mason "genwork", 1, NULL); 215461d92c32SChris Mason 21555443be45SChris Mason btrfs_init_workers(&fs_info->workers, "worker", 215661d92c32SChris Mason fs_info->thread_pool_size, 215761d92c32SChris Mason &fs_info->generic_worker); 2158c8b97818SChris Mason 2159771ed689SChris Mason btrfs_init_workers(&fs_info->delalloc_workers, "delalloc", 216061d92c32SChris Mason fs_info->thread_pool_size, 216161d92c32SChris Mason &fs_info->generic_worker); 2162771ed689SChris Mason 21635443be45SChris Mason btrfs_init_workers(&fs_info->submit_workers, "submit", 2164b720d209SChris Mason min_t(u64, fs_devices->num_devices, 216561d92c32SChris Mason fs_info->thread_pool_size), 216661d92c32SChris Mason &fs_info->generic_worker); 216761b49440SChris Mason 2168bab39bf9SJosef Bacik btrfs_init_workers(&fs_info->caching_workers, "cache", 2169bab39bf9SJosef Bacik 2, &fs_info->generic_worker); 2170bab39bf9SJosef Bacik 217161b49440SChris Mason /* a higher idle thresh on the submit workers makes it much more 217261b49440SChris Mason * likely that bios will be send down in a sane order to the 217361b49440SChris Mason * devices 217461b49440SChris Mason */ 217561b49440SChris Mason fs_info->submit_workers.idle_thresh = 64; 217653863232SChris Mason 2177771ed689SChris Mason fs_info->workers.idle_thresh = 16; 21784a69a410SChris Mason fs_info->workers.ordered = 1; 217961b49440SChris Mason 2180771ed689SChris Mason fs_info->delalloc_workers.idle_thresh = 2; 2181771ed689SChris Mason fs_info->delalloc_workers.ordered = 1; 2182771ed689SChris Mason 218361d92c32SChris Mason btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1, 218461d92c32SChris Mason &fs_info->generic_worker); 21855443be45SChris Mason btrfs_init_workers(&fs_info->endio_workers, "endio", 218661d92c32SChris Mason fs_info->thread_pool_size, 218761d92c32SChris Mason &fs_info->generic_worker); 2188d20f7043SChris Mason btrfs_init_workers(&fs_info->endio_meta_workers, "endio-meta", 218961d92c32SChris Mason fs_info->thread_pool_size, 219061d92c32SChris Mason &fs_info->generic_worker); 2191cad321adSChris Mason btrfs_init_workers(&fs_info->endio_meta_write_workers, 219261d92c32SChris Mason "endio-meta-write", fs_info->thread_pool_size, 219361d92c32SChris Mason &fs_info->generic_worker); 21945443be45SChris Mason btrfs_init_workers(&fs_info->endio_write_workers, "endio-write", 219561d92c32SChris Mason fs_info->thread_pool_size, 219661d92c32SChris Mason &fs_info->generic_worker); 21970cb59c99SJosef Bacik btrfs_init_workers(&fs_info->endio_freespace_worker, "freespace-write", 21980cb59c99SJosef Bacik 1, &fs_info->generic_worker); 219916cdcec7SMiao Xie btrfs_init_workers(&fs_info->delayed_workers, "delayed-meta", 220016cdcec7SMiao Xie fs_info->thread_pool_size, 220116cdcec7SMiao Xie &fs_info->generic_worker); 220290519d66SArne Jansen btrfs_init_workers(&fs_info->readahead_workers, "readahead", 220390519d66SArne Jansen fs_info->thread_pool_size, 220490519d66SArne Jansen &fs_info->generic_worker); 220561b49440SChris Mason 220661b49440SChris Mason /* 220761b49440SChris Mason * endios are largely parallel and should have a very 220861b49440SChris Mason * low idle thresh 220961b49440SChris Mason */ 221061b49440SChris Mason fs_info->endio_workers.idle_thresh = 4; 2211b51912c9SChris Mason fs_info->endio_meta_workers.idle_thresh = 4; 2212b51912c9SChris Mason 22139042846bSChris Mason fs_info->endio_write_workers.idle_thresh = 2; 22149042846bSChris Mason fs_info->endio_meta_write_workers.idle_thresh = 2; 221590519d66SArne Jansen fs_info->readahead_workers.idle_thresh = 2; 22169042846bSChris Mason 22170dc3b84aSJosef Bacik /* 22180dc3b84aSJosef Bacik * btrfs_start_workers can really only fail because of ENOMEM so just 22190dc3b84aSJosef Bacik * return -ENOMEM if any of these fail. 22200dc3b84aSJosef Bacik */ 22210dc3b84aSJosef Bacik ret = btrfs_start_workers(&fs_info->workers); 22220dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->generic_worker); 22230dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->submit_workers); 22240dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delalloc_workers); 22250dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->fixup_workers); 22260dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_workers); 22270dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_workers); 22280dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_write_workers); 22290dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_write_workers); 22300dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_freespace_worker); 22310dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delayed_workers); 22320dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->caching_workers); 22330dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->readahead_workers); 22340dc3b84aSJosef Bacik if (ret) { 22350dc3b84aSJosef Bacik ret = -ENOMEM; 22360dc3b84aSJosef Bacik goto fail_sb_buffer; 22370dc3b84aSJosef Bacik } 22384543df7eSChris Mason 22394575c9ccSChris Mason fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); 2240c8b97818SChris Mason fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, 2241c8b97818SChris Mason 4 * 1024 * 1024 / PAGE_CACHE_SIZE); 22424575c9ccSChris Mason 2243db94535dSChris Mason tree_root->nodesize = nodesize; 2244db94535dSChris Mason tree_root->leafsize = leafsize; 2245db94535dSChris Mason tree_root->sectorsize = sectorsize; 224687ee04ebSChris Mason tree_root->stripesize = stripesize; 2247a061fc8dSChris Mason 2248a061fc8dSChris Mason sb->s_blocksize = sectorsize; 2249a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(sectorsize); 2250db94535dSChris Mason 225139279cc3SChris Mason if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC, 225239279cc3SChris Mason sizeof(disk_super->magic))) { 2253d397712bSChris Mason printk(KERN_INFO "btrfs: valid FS not found on %s\n", sb->s_id); 225439279cc3SChris Mason goto fail_sb_buffer; 225539279cc3SChris Mason } 225619c00ddcSChris Mason 22578d082fb7SLiu Bo if (sectorsize != PAGE_SIZE) { 22588d082fb7SLiu Bo printk(KERN_WARNING "btrfs: Incompatible sector size(%lu) " 22598d082fb7SLiu Bo "found on %s\n", (unsigned long)sectorsize, sb->s_id); 2260941b2ddfSKeith Mannthey goto fail_sb_buffer; 2261941b2ddfSKeith Mannthey } 2262941b2ddfSKeith Mannthey 2263925baeddSChris Mason mutex_lock(&fs_info->chunk_mutex); 2264e4404d6eSYan Zheng ret = btrfs_read_sys_array(tree_root); 2265925baeddSChris Mason mutex_unlock(&fs_info->chunk_mutex); 226684eed90fSChris Mason if (ret) { 2267d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read the system " 2268d397712bSChris Mason "array on %s\n", sb->s_id); 22695d4f98a2SYan Zheng goto fail_sb_buffer; 227084eed90fSChris Mason } 22710b86a832SChris Mason 22720b86a832SChris Mason blocksize = btrfs_level_size(tree_root, 22730b86a832SChris Mason btrfs_super_chunk_root_level(disk_super)); 227484234f3aSYan Zheng generation = btrfs_super_chunk_root_generation(disk_super); 22750b86a832SChris Mason 22760b86a832SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 22770b86a832SChris Mason chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); 22780b86a832SChris Mason 22790b86a832SChris Mason chunk_root->node = read_tree_block(chunk_root, 22800b86a832SChris Mason btrfs_super_chunk_root(disk_super), 228184234f3aSYan Zheng blocksize, generation); 228279787eaaSJeff Mahoney BUG_ON(!chunk_root->node); /* -ENOMEM */ 228383121942SDavid Woodhouse if (!test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { 228483121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n", 228583121942SDavid Woodhouse sb->s_id); 2286af31f5e5SChris Mason goto fail_tree_roots; 228783121942SDavid Woodhouse } 22885d4f98a2SYan Zheng btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); 22895d4f98a2SYan Zheng chunk_root->commit_root = btrfs_root_node(chunk_root); 22900b86a832SChris Mason 2291e17cade2SChris Mason read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, 2292e17cade2SChris Mason (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node), 2293e17cade2SChris Mason BTRFS_UUID_SIZE); 2294e17cade2SChris Mason 22950b86a832SChris Mason ret = btrfs_read_chunk_tree(chunk_root); 22962b82032cSYan Zheng if (ret) { 2297d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read chunk tree on %s\n", 2298d397712bSChris Mason sb->s_id); 2299af31f5e5SChris Mason goto fail_tree_roots; 23002b82032cSYan Zheng } 23010b86a832SChris Mason 2302dfe25020SChris Mason btrfs_close_extra_devices(fs_devices); 2303dfe25020SChris Mason 2304a6b0d5c8SChris Mason if (!fs_devices->latest_bdev) { 2305a6b0d5c8SChris Mason printk(KERN_CRIT "btrfs: failed to read devices on %s\n", 2306a6b0d5c8SChris Mason sb->s_id); 2307a6b0d5c8SChris Mason goto fail_tree_roots; 2308a6b0d5c8SChris Mason } 2309a6b0d5c8SChris Mason 2310af31f5e5SChris Mason retry_root_backup: 2311db94535dSChris Mason blocksize = btrfs_level_size(tree_root, 2312db94535dSChris Mason btrfs_super_root_level(disk_super)); 231384234f3aSYan Zheng generation = btrfs_super_generation(disk_super); 23140b86a832SChris Mason 2315e20d96d6SChris Mason tree_root->node = read_tree_block(tree_root, 2316db94535dSChris Mason btrfs_super_root(disk_super), 231784234f3aSYan Zheng blocksize, generation); 2318af31f5e5SChris Mason if (!tree_root->node || 2319af31f5e5SChris Mason !test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) { 232083121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read tree root on %s\n", 232183121942SDavid Woodhouse sb->s_id); 2322af31f5e5SChris Mason 2323af31f5e5SChris Mason goto recovery_tree_root; 232483121942SDavid Woodhouse } 2325af31f5e5SChris Mason 23265d4f98a2SYan Zheng btrfs_set_root_node(&tree_root->root_item, tree_root->node); 23275d4f98a2SYan Zheng tree_root->commit_root = btrfs_root_node(tree_root); 2328db94535dSChris Mason 2329db94535dSChris Mason ret = find_and_setup_root(tree_root, fs_info, 2330e20d96d6SChris Mason BTRFS_EXTENT_TREE_OBJECTID, extent_root); 23310b86a832SChris Mason if (ret) 2332af31f5e5SChris Mason goto recovery_tree_root; 23330b86a832SChris Mason extent_root->track_dirty = 1; 23340b86a832SChris Mason 23350b86a832SChris Mason ret = find_and_setup_root(tree_root, fs_info, 23360b86a832SChris Mason BTRFS_DEV_TREE_OBJECTID, dev_root); 23370b86a832SChris Mason if (ret) 2338af31f5e5SChris Mason goto recovery_tree_root; 23395d4f98a2SYan Zheng dev_root->track_dirty = 1; 23403768f368SChris Mason 2341d20f7043SChris Mason ret = find_and_setup_root(tree_root, fs_info, 2342d20f7043SChris Mason BTRFS_CSUM_TREE_OBJECTID, csum_root); 2343d20f7043SChris Mason if (ret) 2344af31f5e5SChris Mason goto recovery_tree_root; 2345d20f7043SChris Mason 2346d20f7043SChris Mason csum_root->track_dirty = 1; 2347d20f7043SChris Mason 23488929ecfaSYan, Zheng fs_info->generation = generation; 23498929ecfaSYan, Zheng fs_info->last_trans_committed = generation; 23508929ecfaSYan, Zheng 2351c59021f8Sliubo ret = btrfs_init_space_info(fs_info); 2352c59021f8Sliubo if (ret) { 2353c59021f8Sliubo printk(KERN_ERR "Failed to initial space info: %d\n", ret); 2354c59021f8Sliubo goto fail_block_groups; 2355c59021f8Sliubo } 2356c59021f8Sliubo 23571b1d1f66SJosef Bacik ret = btrfs_read_block_groups(extent_root); 23581b1d1f66SJosef Bacik if (ret) { 23591b1d1f66SJosef Bacik printk(KERN_ERR "Failed to read block groups: %d\n", ret); 23601b1d1f66SJosef Bacik goto fail_block_groups; 23611b1d1f66SJosef Bacik } 23629078a3e1SChris Mason 2363a74a4b97SChris Mason fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 2364a74a4b97SChris Mason "btrfs-cleaner"); 236557506d50SQinghuang Feng if (IS_ERR(fs_info->cleaner_kthread)) 23661b1d1f66SJosef Bacik goto fail_block_groups; 2367a74a4b97SChris Mason 2368a74a4b97SChris Mason fs_info->transaction_kthread = kthread_run(transaction_kthread, 2369a74a4b97SChris Mason tree_root, 2370a74a4b97SChris Mason "btrfs-transaction"); 237157506d50SQinghuang Feng if (IS_ERR(fs_info->transaction_kthread)) 23723f157a2fSChris Mason goto fail_cleaner; 2373a74a4b97SChris Mason 2374c289811cSChris Mason if (!btrfs_test_opt(tree_root, SSD) && 2375c289811cSChris Mason !btrfs_test_opt(tree_root, NOSSD) && 2376c289811cSChris Mason !fs_info->fs_devices->rotating) { 2377c289811cSChris Mason printk(KERN_INFO "Btrfs detected SSD devices, enabling SSD " 2378c289811cSChris Mason "mode\n"); 2379c289811cSChris Mason btrfs_set_opt(fs_info->mount_opt, SSD); 2380c289811cSChris Mason } 2381c289811cSChris Mason 238221adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 238321adbd5cSStefan Behrens if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { 238421adbd5cSStefan Behrens ret = btrfsic_mount(tree_root, fs_devices, 238521adbd5cSStefan Behrens btrfs_test_opt(tree_root, 238621adbd5cSStefan Behrens CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? 238721adbd5cSStefan Behrens 1 : 0, 238821adbd5cSStefan Behrens fs_info->check_integrity_print_mask); 238921adbd5cSStefan Behrens if (ret) 239021adbd5cSStefan Behrens printk(KERN_WARNING "btrfs: failed to initialize" 239121adbd5cSStefan Behrens " integrity check module %s\n", sb->s_id); 239221adbd5cSStefan Behrens } 239321adbd5cSStefan Behrens #endif 239421adbd5cSStefan Behrens 2395acce952bSliubo /* do not make disk changes in broken FS */ 2396acce952bSliubo if (btrfs_super_log_root(disk_super) != 0 && 2397acce952bSliubo !(fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR)) { 2398e02119d5SChris Mason u64 bytenr = btrfs_super_log_root(disk_super); 2399d18a2c44SChris Mason 24007c2ca468SChris Mason if (fs_devices->rw_devices == 0) { 2401d397712bSChris Mason printk(KERN_WARNING "Btrfs log replay required " 2402d397712bSChris Mason "on RO media\n"); 24037c2ca468SChris Mason err = -EIO; 24047c2ca468SChris Mason goto fail_trans_kthread; 24057c2ca468SChris Mason } 2406e02119d5SChris Mason blocksize = 2407e02119d5SChris Mason btrfs_level_size(tree_root, 2408e02119d5SChris Mason btrfs_super_log_root_level(disk_super)); 2409e02119d5SChris Mason 24106f07e42eSAl Viro log_tree_root = btrfs_alloc_root(fs_info); 2411676e4c86SDan Carpenter if (!log_tree_root) { 2412676e4c86SDan Carpenter err = -ENOMEM; 2413676e4c86SDan Carpenter goto fail_trans_kthread; 2414676e4c86SDan Carpenter } 2415e02119d5SChris Mason 2416e02119d5SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 2417e02119d5SChris Mason log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); 2418e02119d5SChris Mason 2419e02119d5SChris Mason log_tree_root->node = read_tree_block(tree_root, bytenr, 242084234f3aSYan Zheng blocksize, 242184234f3aSYan Zheng generation + 1); 242279787eaaSJeff Mahoney /* returns with log_tree_root freed on success */ 2423e02119d5SChris Mason ret = btrfs_recover_log_trees(log_tree_root); 242479787eaaSJeff Mahoney if (ret) { 242579787eaaSJeff Mahoney btrfs_error(tree_root->fs_info, ret, 242679787eaaSJeff Mahoney "Failed to recover log tree"); 242779787eaaSJeff Mahoney free_extent_buffer(log_tree_root->node); 242879787eaaSJeff Mahoney kfree(log_tree_root); 242979787eaaSJeff Mahoney goto fail_trans_kthread; 243079787eaaSJeff Mahoney } 2431e556ce2cSYan Zheng 2432e556ce2cSYan Zheng if (sb->s_flags & MS_RDONLY) { 2433e556ce2cSYan Zheng ret = btrfs_commit_super(tree_root); 243479787eaaSJeff Mahoney if (ret) 243579787eaaSJeff Mahoney goto fail_trans_kthread; 2436e556ce2cSYan Zheng } 2437e02119d5SChris Mason } 24381a40e23bSZheng Yan 243976dda93cSYan, Zheng ret = btrfs_find_orphan_roots(tree_root); 244079787eaaSJeff Mahoney if (ret) 244179787eaaSJeff Mahoney goto fail_trans_kthread; 244276dda93cSYan, Zheng 24437c2ca468SChris Mason if (!(sb->s_flags & MS_RDONLY)) { 2444d68fc57bSYan, Zheng ret = btrfs_cleanup_fs_roots(fs_info); 244579787eaaSJeff Mahoney if (ret) { 244679787eaaSJeff Mahoney } 2447d68fc57bSYan, Zheng 24485d4f98a2SYan Zheng ret = btrfs_recover_relocation(tree_root); 2449d7ce5843SMiao Xie if (ret < 0) { 2450d7ce5843SMiao Xie printk(KERN_WARNING 2451d7ce5843SMiao Xie "btrfs: failed to recover relocation\n"); 2452d7ce5843SMiao Xie err = -EINVAL; 2453d7ce5843SMiao Xie goto fail_trans_kthread; 2454d7ce5843SMiao Xie } 24557c2ca468SChris Mason } 24561a40e23bSZheng Yan 24573de4586cSChris Mason location.objectid = BTRFS_FS_TREE_OBJECTID; 24583de4586cSChris Mason location.type = BTRFS_ROOT_ITEM_KEY; 24593de4586cSChris Mason location.offset = (u64)-1; 24603de4586cSChris Mason 24613de4586cSChris Mason fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); 24623de4586cSChris Mason if (!fs_info->fs_root) 24637c2ca468SChris Mason goto fail_trans_kthread; 24643140c9a3SDan Carpenter if (IS_ERR(fs_info->fs_root)) { 24653140c9a3SDan Carpenter err = PTR_ERR(fs_info->fs_root); 24663140c9a3SDan Carpenter goto fail_trans_kthread; 24673140c9a3SDan Carpenter } 2468c289811cSChris Mason 2469e3acc2a6SJosef Bacik if (!(sb->s_flags & MS_RDONLY)) { 2470e3acc2a6SJosef Bacik down_read(&fs_info->cleanup_work_sem); 247166b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(fs_info->fs_root); 247266b4ffd1SJosef Bacik if (!err) 247366b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(fs_info->tree_root); 2474e3acc2a6SJosef Bacik up_read(&fs_info->cleanup_work_sem); 247559641015SIlya Dryomov 247659641015SIlya Dryomov if (!err) 247759641015SIlya Dryomov err = btrfs_recover_balance(fs_info->tree_root); 247859641015SIlya Dryomov 247966b4ffd1SJosef Bacik if (err) { 248066b4ffd1SJosef Bacik close_ctree(tree_root); 2481ad2b2c80SAl Viro return err; 248266b4ffd1SJosef Bacik } 2483e3acc2a6SJosef Bacik } 2484e3acc2a6SJosef Bacik 2485ad2b2c80SAl Viro return 0; 248639279cc3SChris Mason 24877c2ca468SChris Mason fail_trans_kthread: 24887c2ca468SChris Mason kthread_stop(fs_info->transaction_kthread); 24893f157a2fSChris Mason fail_cleaner: 2490a74a4b97SChris Mason kthread_stop(fs_info->cleaner_kthread); 24917c2ca468SChris Mason 24927c2ca468SChris Mason /* 24937c2ca468SChris Mason * make sure we're done with the btree inode before we stop our 24947c2ca468SChris Mason * kthreads 24957c2ca468SChris Mason */ 24967c2ca468SChris Mason filemap_write_and_wait(fs_info->btree_inode->i_mapping); 24977c2ca468SChris Mason invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 24987c2ca468SChris Mason 24991b1d1f66SJosef Bacik fail_block_groups: 25001b1d1f66SJosef Bacik btrfs_free_block_groups(fs_info); 2501af31f5e5SChris Mason 2502af31f5e5SChris Mason fail_tree_roots: 2503af31f5e5SChris Mason free_root_pointers(fs_info, 1); 2504af31f5e5SChris Mason 250539279cc3SChris Mason fail_sb_buffer: 250661d92c32SChris Mason btrfs_stop_workers(&fs_info->generic_worker); 2507306c8b68SChris Mason btrfs_stop_workers(&fs_info->readahead_workers); 2508247e743cSChris Mason btrfs_stop_workers(&fs_info->fixup_workers); 2509771ed689SChris Mason btrfs_stop_workers(&fs_info->delalloc_workers); 25108b712842SChris Mason btrfs_stop_workers(&fs_info->workers); 25118b712842SChris Mason btrfs_stop_workers(&fs_info->endio_workers); 2512d20f7043SChris Mason btrfs_stop_workers(&fs_info->endio_meta_workers); 2513cad321adSChris Mason btrfs_stop_workers(&fs_info->endio_meta_write_workers); 2514e6dcd2dcSChris Mason btrfs_stop_workers(&fs_info->endio_write_workers); 25150cb59c99SJosef Bacik btrfs_stop_workers(&fs_info->endio_freespace_worker); 25161cc127b5SChris Mason btrfs_stop_workers(&fs_info->submit_workers); 251716cdcec7SMiao Xie btrfs_stop_workers(&fs_info->delayed_workers); 2518bab39bf9SJosef Bacik btrfs_stop_workers(&fs_info->caching_workers); 251916cdcec7SMiao Xie fail_alloc: 25204543df7eSChris Mason fail_iput: 2521586e46e2SIlya Dryomov btrfs_mapping_tree_free(&fs_info->mapping_tree); 2522586e46e2SIlya Dryomov 25237c2ca468SChris Mason invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 25244543df7eSChris Mason iput(fs_info->btree_inode); 2525ad081f14SJens Axboe fail_bdi: 25267e662854SQinghuang Feng bdi_destroy(&fs_info->bdi); 252776dda93cSYan, Zheng fail_srcu: 252876dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 25297e662854SQinghuang Feng fail: 2530586e46e2SIlya Dryomov btrfs_close_devices(fs_info->fs_devices); 2531ad2b2c80SAl Viro return err; 2532af31f5e5SChris Mason 2533af31f5e5SChris Mason recovery_tree_root: 2534af31f5e5SChris Mason if (!btrfs_test_opt(tree_root, RECOVERY)) 2535af31f5e5SChris Mason goto fail_tree_roots; 2536af31f5e5SChris Mason 2537af31f5e5SChris Mason free_root_pointers(fs_info, 0); 2538af31f5e5SChris Mason 2539af31f5e5SChris Mason /* don't use the log in recovery mode, it won't be valid */ 2540af31f5e5SChris Mason btrfs_set_super_log_root(disk_super, 0); 2541af31f5e5SChris Mason 2542af31f5e5SChris Mason /* we can't trust the free space cache either */ 2543af31f5e5SChris Mason btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); 2544af31f5e5SChris Mason 2545af31f5e5SChris Mason ret = next_root_backup(fs_info, fs_info->super_copy, 2546af31f5e5SChris Mason &num_backups_tried, &backup_index); 2547af31f5e5SChris Mason if (ret == -1) 2548af31f5e5SChris Mason goto fail_block_groups; 2549af31f5e5SChris Mason goto retry_root_backup; 2550eb60ceacSChris Mason } 2551eb60ceacSChris Mason 2552f2984462SChris Mason static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) 2553f2984462SChris Mason { 2554f2984462SChris Mason char b[BDEVNAME_SIZE]; 2555f2984462SChris Mason 2556f2984462SChris Mason if (uptodate) { 2557f2984462SChris Mason set_buffer_uptodate(bh); 2558f2984462SChris Mason } else { 25597a36ddecSDavid Sterba printk_ratelimited(KERN_WARNING "lost page write due to " 2560f2984462SChris Mason "I/O error on %s\n", 2561f2984462SChris Mason bdevname(bh->b_bdev, b)); 25621259ab75SChris Mason /* note, we dont' set_buffer_write_io_error because we have 25631259ab75SChris Mason * our own ways of dealing with the IO errors 25641259ab75SChris Mason */ 2565f2984462SChris Mason clear_buffer_uptodate(bh); 2566f2984462SChris Mason } 2567f2984462SChris Mason unlock_buffer(bh); 2568f2984462SChris Mason put_bh(bh); 2569f2984462SChris Mason } 2570f2984462SChris Mason 2571a512bbf8SYan Zheng struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) 2572a512bbf8SYan Zheng { 2573a512bbf8SYan Zheng struct buffer_head *bh; 2574a512bbf8SYan Zheng struct buffer_head *latest = NULL; 2575a512bbf8SYan Zheng struct btrfs_super_block *super; 2576a512bbf8SYan Zheng int i; 2577a512bbf8SYan Zheng u64 transid = 0; 2578a512bbf8SYan Zheng u64 bytenr; 2579a512bbf8SYan Zheng 2580a512bbf8SYan Zheng /* we would like to check all the supers, but that would make 2581a512bbf8SYan Zheng * a btrfs mount succeed after a mkfs from a different FS. 2582a512bbf8SYan Zheng * So, we need to add a special mount option to scan for 2583a512bbf8SYan Zheng * later supers, using BTRFS_SUPER_MIRROR_MAX instead 2584a512bbf8SYan Zheng */ 2585a512bbf8SYan Zheng for (i = 0; i < 1; i++) { 2586a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 2587a512bbf8SYan Zheng if (bytenr + 4096 >= i_size_read(bdev->bd_inode)) 2588a512bbf8SYan Zheng break; 2589a512bbf8SYan Zheng bh = __bread(bdev, bytenr / 4096, 4096); 2590a512bbf8SYan Zheng if (!bh) 2591a512bbf8SYan Zheng continue; 2592a512bbf8SYan Zheng 2593a512bbf8SYan Zheng super = (struct btrfs_super_block *)bh->b_data; 2594a512bbf8SYan Zheng if (btrfs_super_bytenr(super) != bytenr || 2595a512bbf8SYan Zheng strncmp((char *)(&super->magic), BTRFS_MAGIC, 2596a512bbf8SYan Zheng sizeof(super->magic))) { 2597a512bbf8SYan Zheng brelse(bh); 2598a512bbf8SYan Zheng continue; 2599a512bbf8SYan Zheng } 2600a512bbf8SYan Zheng 2601a512bbf8SYan Zheng if (!latest || btrfs_super_generation(super) > transid) { 2602a512bbf8SYan Zheng brelse(latest); 2603a512bbf8SYan Zheng latest = bh; 2604a512bbf8SYan Zheng transid = btrfs_super_generation(super); 2605a512bbf8SYan Zheng } else { 2606a512bbf8SYan Zheng brelse(bh); 2607a512bbf8SYan Zheng } 2608a512bbf8SYan Zheng } 2609a512bbf8SYan Zheng return latest; 2610a512bbf8SYan Zheng } 2611a512bbf8SYan Zheng 26124eedeb75SHisashi Hifumi /* 26134eedeb75SHisashi Hifumi * this should be called twice, once with wait == 0 and 26144eedeb75SHisashi Hifumi * once with wait == 1. When wait == 0 is done, all the buffer heads 26154eedeb75SHisashi Hifumi * we write are pinned. 26164eedeb75SHisashi Hifumi * 26174eedeb75SHisashi Hifumi * They are released when wait == 1 is done. 26184eedeb75SHisashi Hifumi * max_mirrors must be the same for both runs, and it indicates how 26194eedeb75SHisashi Hifumi * many supers on this one device should be written. 26204eedeb75SHisashi Hifumi * 26214eedeb75SHisashi Hifumi * max_mirrors == 0 means to write them all. 26224eedeb75SHisashi Hifumi */ 2623a512bbf8SYan Zheng static int write_dev_supers(struct btrfs_device *device, 2624a512bbf8SYan Zheng struct btrfs_super_block *sb, 2625a512bbf8SYan Zheng int do_barriers, int wait, int max_mirrors) 2626a512bbf8SYan Zheng { 2627a512bbf8SYan Zheng struct buffer_head *bh; 2628a512bbf8SYan Zheng int i; 2629a512bbf8SYan Zheng int ret; 2630a512bbf8SYan Zheng int errors = 0; 2631a512bbf8SYan Zheng u32 crc; 2632a512bbf8SYan Zheng u64 bytenr; 2633a512bbf8SYan Zheng 2634a512bbf8SYan Zheng if (max_mirrors == 0) 2635a512bbf8SYan Zheng max_mirrors = BTRFS_SUPER_MIRROR_MAX; 2636a512bbf8SYan Zheng 2637a512bbf8SYan Zheng for (i = 0; i < max_mirrors; i++) { 2638a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 2639a512bbf8SYan Zheng if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes) 2640a512bbf8SYan Zheng break; 2641a512bbf8SYan Zheng 2642a512bbf8SYan Zheng if (wait) { 2643a512bbf8SYan Zheng bh = __find_get_block(device->bdev, bytenr / 4096, 2644a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 2645a512bbf8SYan Zheng BUG_ON(!bh); 2646a512bbf8SYan Zheng wait_on_buffer(bh); 26474eedeb75SHisashi Hifumi if (!buffer_uptodate(bh)) 26484eedeb75SHisashi Hifumi errors++; 26494eedeb75SHisashi Hifumi 26504eedeb75SHisashi Hifumi /* drop our reference */ 26514eedeb75SHisashi Hifumi brelse(bh); 26524eedeb75SHisashi Hifumi 26534eedeb75SHisashi Hifumi /* drop the reference from the wait == 0 run */ 2654a512bbf8SYan Zheng brelse(bh); 2655a512bbf8SYan Zheng continue; 2656a512bbf8SYan Zheng } else { 2657a512bbf8SYan Zheng btrfs_set_super_bytenr(sb, bytenr); 2658a512bbf8SYan Zheng 2659a512bbf8SYan Zheng crc = ~(u32)0; 2660a512bbf8SYan Zheng crc = btrfs_csum_data(NULL, (char *)sb + 2661a512bbf8SYan Zheng BTRFS_CSUM_SIZE, crc, 2662a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE - 2663a512bbf8SYan Zheng BTRFS_CSUM_SIZE); 2664a512bbf8SYan Zheng btrfs_csum_final(crc, sb->csum); 2665a512bbf8SYan Zheng 26664eedeb75SHisashi Hifumi /* 26674eedeb75SHisashi Hifumi * one reference for us, and we leave it for the 26684eedeb75SHisashi Hifumi * caller 26694eedeb75SHisashi Hifumi */ 2670a512bbf8SYan Zheng bh = __getblk(device->bdev, bytenr / 4096, 2671a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 2672a512bbf8SYan Zheng memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); 2673a512bbf8SYan Zheng 26744eedeb75SHisashi Hifumi /* one reference for submit_bh */ 2675a512bbf8SYan Zheng get_bh(bh); 26764eedeb75SHisashi Hifumi 26774eedeb75SHisashi Hifumi set_buffer_uptodate(bh); 2678a512bbf8SYan Zheng lock_buffer(bh); 2679a512bbf8SYan Zheng bh->b_end_io = btrfs_end_buffer_write_sync; 2680a512bbf8SYan Zheng } 2681a512bbf8SYan Zheng 2682387125fcSChris Mason /* 2683387125fcSChris Mason * we fua the first super. The others we allow 2684387125fcSChris Mason * to go down lazy. 2685387125fcSChris Mason */ 268621adbd5cSStefan Behrens ret = btrfsic_submit_bh(WRITE_FUA, bh); 26874eedeb75SHisashi Hifumi if (ret) 2688a512bbf8SYan Zheng errors++; 2689a512bbf8SYan Zheng } 2690a512bbf8SYan Zheng return errors < i ? 0 : -1; 2691a512bbf8SYan Zheng } 2692a512bbf8SYan Zheng 2693387125fcSChris Mason /* 2694387125fcSChris Mason * endio for the write_dev_flush, this will wake anyone waiting 2695387125fcSChris Mason * for the barrier when it is done 2696387125fcSChris Mason */ 2697387125fcSChris Mason static void btrfs_end_empty_barrier(struct bio *bio, int err) 2698387125fcSChris Mason { 2699387125fcSChris Mason if (err) { 2700387125fcSChris Mason if (err == -EOPNOTSUPP) 2701387125fcSChris Mason set_bit(BIO_EOPNOTSUPP, &bio->bi_flags); 2702387125fcSChris Mason clear_bit(BIO_UPTODATE, &bio->bi_flags); 2703387125fcSChris Mason } 2704387125fcSChris Mason if (bio->bi_private) 2705387125fcSChris Mason complete(bio->bi_private); 2706387125fcSChris Mason bio_put(bio); 2707387125fcSChris Mason } 2708387125fcSChris Mason 2709387125fcSChris Mason /* 2710387125fcSChris Mason * trigger flushes for one the devices. If you pass wait == 0, the flushes are 2711387125fcSChris Mason * sent down. With wait == 1, it waits for the previous flush. 2712387125fcSChris Mason * 2713387125fcSChris Mason * any device where the flush fails with eopnotsupp are flagged as not-barrier 2714387125fcSChris Mason * capable 2715387125fcSChris Mason */ 2716387125fcSChris Mason static int write_dev_flush(struct btrfs_device *device, int wait) 2717387125fcSChris Mason { 2718387125fcSChris Mason struct bio *bio; 2719387125fcSChris Mason int ret = 0; 2720387125fcSChris Mason 2721387125fcSChris Mason if (device->nobarriers) 2722387125fcSChris Mason return 0; 2723387125fcSChris Mason 2724387125fcSChris Mason if (wait) { 2725387125fcSChris Mason bio = device->flush_bio; 2726387125fcSChris Mason if (!bio) 2727387125fcSChris Mason return 0; 2728387125fcSChris Mason 2729387125fcSChris Mason wait_for_completion(&device->flush_wait); 2730387125fcSChris Mason 2731387125fcSChris Mason if (bio_flagged(bio, BIO_EOPNOTSUPP)) { 2732387125fcSChris Mason printk("btrfs: disabling barriers on dev %s\n", 2733387125fcSChris Mason device->name); 2734387125fcSChris Mason device->nobarriers = 1; 2735387125fcSChris Mason } 2736387125fcSChris Mason if (!bio_flagged(bio, BIO_UPTODATE)) { 2737387125fcSChris Mason ret = -EIO; 2738387125fcSChris Mason } 2739387125fcSChris Mason 2740387125fcSChris Mason /* drop the reference from the wait == 0 run */ 2741387125fcSChris Mason bio_put(bio); 2742387125fcSChris Mason device->flush_bio = NULL; 2743387125fcSChris Mason 2744387125fcSChris Mason return ret; 2745387125fcSChris Mason } 2746387125fcSChris Mason 2747387125fcSChris Mason /* 2748387125fcSChris Mason * one reference for us, and we leave it for the 2749387125fcSChris Mason * caller 2750387125fcSChris Mason */ 2751387125fcSChris Mason device->flush_bio = NULL;; 2752387125fcSChris Mason bio = bio_alloc(GFP_NOFS, 0); 2753387125fcSChris Mason if (!bio) 2754387125fcSChris Mason return -ENOMEM; 2755387125fcSChris Mason 2756387125fcSChris Mason bio->bi_end_io = btrfs_end_empty_barrier; 2757387125fcSChris Mason bio->bi_bdev = device->bdev; 2758387125fcSChris Mason init_completion(&device->flush_wait); 2759387125fcSChris Mason bio->bi_private = &device->flush_wait; 2760387125fcSChris Mason device->flush_bio = bio; 2761387125fcSChris Mason 2762387125fcSChris Mason bio_get(bio); 276321adbd5cSStefan Behrens btrfsic_submit_bio(WRITE_FLUSH, bio); 2764387125fcSChris Mason 2765387125fcSChris Mason return 0; 2766387125fcSChris Mason } 2767387125fcSChris Mason 2768387125fcSChris Mason /* 2769387125fcSChris Mason * send an empty flush down to each device in parallel, 2770387125fcSChris Mason * then wait for them 2771387125fcSChris Mason */ 2772387125fcSChris Mason static int barrier_all_devices(struct btrfs_fs_info *info) 2773387125fcSChris Mason { 2774387125fcSChris Mason struct list_head *head; 2775387125fcSChris Mason struct btrfs_device *dev; 2776387125fcSChris Mason int errors = 0; 2777387125fcSChris Mason int ret; 2778387125fcSChris Mason 2779387125fcSChris Mason /* send down all the barriers */ 2780387125fcSChris Mason head = &info->fs_devices->devices; 2781387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 2782387125fcSChris Mason if (!dev->bdev) { 2783387125fcSChris Mason errors++; 2784387125fcSChris Mason continue; 2785387125fcSChris Mason } 2786387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 2787387125fcSChris Mason continue; 2788387125fcSChris Mason 2789387125fcSChris Mason ret = write_dev_flush(dev, 0); 2790387125fcSChris Mason if (ret) 2791387125fcSChris Mason errors++; 2792387125fcSChris Mason } 2793387125fcSChris Mason 2794387125fcSChris Mason /* wait for all the barriers */ 2795387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 2796387125fcSChris Mason if (!dev->bdev) { 2797387125fcSChris Mason errors++; 2798387125fcSChris Mason continue; 2799387125fcSChris Mason } 2800387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 2801387125fcSChris Mason continue; 2802387125fcSChris Mason 2803387125fcSChris Mason ret = write_dev_flush(dev, 1); 2804387125fcSChris Mason if (ret) 2805387125fcSChris Mason errors++; 2806387125fcSChris Mason } 2807387125fcSChris Mason if (errors) 2808387125fcSChris Mason return -EIO; 2809387125fcSChris Mason return 0; 2810387125fcSChris Mason } 2811387125fcSChris Mason 2812a512bbf8SYan Zheng int write_all_supers(struct btrfs_root *root, int max_mirrors) 2813f2984462SChris Mason { 2814e5e9a520SChris Mason struct list_head *head; 2815f2984462SChris Mason struct btrfs_device *dev; 2816a061fc8dSChris Mason struct btrfs_super_block *sb; 2817f2984462SChris Mason struct btrfs_dev_item *dev_item; 2818f2984462SChris Mason int ret; 2819f2984462SChris Mason int do_barriers; 2820a236aed1SChris Mason int max_errors; 2821a236aed1SChris Mason int total_errors = 0; 2822a061fc8dSChris Mason u64 flags; 2823f2984462SChris Mason 28246c41761fSDavid Sterba max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; 2825f2984462SChris Mason do_barriers = !btrfs_test_opt(root, NOBARRIER); 2826af31f5e5SChris Mason backup_super_roots(root->fs_info); 2827f2984462SChris Mason 28286c41761fSDavid Sterba sb = root->fs_info->super_for_commit; 2829a061fc8dSChris Mason dev_item = &sb->dev_item; 2830e5e9a520SChris Mason 2831174ba509SChris Mason mutex_lock(&root->fs_info->fs_devices->device_list_mutex); 2832e5e9a520SChris Mason head = &root->fs_info->fs_devices->devices; 2833387125fcSChris Mason 2834387125fcSChris Mason if (do_barriers) 2835387125fcSChris Mason barrier_all_devices(root->fs_info); 2836387125fcSChris Mason 28371f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 2838dfe25020SChris Mason if (!dev->bdev) { 2839dfe25020SChris Mason total_errors++; 2840dfe25020SChris Mason continue; 2841dfe25020SChris Mason } 28422b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 2843dfe25020SChris Mason continue; 2844dfe25020SChris Mason 28452b82032cSYan Zheng btrfs_set_stack_device_generation(dev_item, 0); 2846a061fc8dSChris Mason btrfs_set_stack_device_type(dev_item, dev->type); 2847a061fc8dSChris Mason btrfs_set_stack_device_id(dev_item, dev->devid); 2848a061fc8dSChris Mason btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes); 2849a061fc8dSChris Mason btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used); 2850a061fc8dSChris Mason btrfs_set_stack_device_io_align(dev_item, dev->io_align); 2851a061fc8dSChris Mason btrfs_set_stack_device_io_width(dev_item, dev->io_width); 2852a061fc8dSChris Mason btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); 2853a061fc8dSChris Mason memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); 28542b82032cSYan Zheng memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); 2855a512bbf8SYan Zheng 2856a061fc8dSChris Mason flags = btrfs_super_flags(sb); 2857a061fc8dSChris Mason btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); 2858f2984462SChris Mason 2859a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); 2860a236aed1SChris Mason if (ret) 2861a236aed1SChris Mason total_errors++; 2862f2984462SChris Mason } 2863a236aed1SChris Mason if (total_errors > max_errors) { 2864d397712bSChris Mason printk(KERN_ERR "btrfs: %d errors while writing supers\n", 2865d397712bSChris Mason total_errors); 286679787eaaSJeff Mahoney 286779787eaaSJeff Mahoney /* This shouldn't happen. FUA is masked off if unsupported */ 2868a236aed1SChris Mason BUG(); 2869a236aed1SChris Mason } 2870f2984462SChris Mason 2871a512bbf8SYan Zheng total_errors = 0; 28721f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 2873dfe25020SChris Mason if (!dev->bdev) 2874dfe25020SChris Mason continue; 28752b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 2876dfe25020SChris Mason continue; 2877dfe25020SChris Mason 2878a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); 2879a512bbf8SYan Zheng if (ret) 28801259ab75SChris Mason total_errors++; 2881f2984462SChris Mason } 2882174ba509SChris Mason mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 2883a236aed1SChris Mason if (total_errors > max_errors) { 288479787eaaSJeff Mahoney btrfs_error(root->fs_info, -EIO, 288579787eaaSJeff Mahoney "%d errors while writing supers", total_errors); 288679787eaaSJeff Mahoney return -EIO; 2887a236aed1SChris Mason } 2888f2984462SChris Mason return 0; 2889f2984462SChris Mason } 2890f2984462SChris Mason 2891a512bbf8SYan Zheng int write_ctree_super(struct btrfs_trans_handle *trans, 2892a512bbf8SYan Zheng struct btrfs_root *root, int max_mirrors) 2893cfaa7295SChris Mason { 2894e66f709bSChris Mason int ret; 28952c90e5d6SChris Mason 2896a512bbf8SYan Zheng ret = write_all_supers(root, max_mirrors); 28975f39d397SChris Mason return ret; 2898cfaa7295SChris Mason } 2899cfaa7295SChris Mason 290049b25e05SJeff Mahoney /* Kill all outstanding I/O */ 290149b25e05SJeff Mahoney void btrfs_abort_devices(struct btrfs_root *root) 290249b25e05SJeff Mahoney { 290349b25e05SJeff Mahoney struct list_head *head; 290449b25e05SJeff Mahoney struct btrfs_device *dev; 290549b25e05SJeff Mahoney mutex_lock(&root->fs_info->fs_devices->device_list_mutex); 290649b25e05SJeff Mahoney head = &root->fs_info->fs_devices->devices; 290749b25e05SJeff Mahoney list_for_each_entry_rcu(dev, head, dev_list) { 290849b25e05SJeff Mahoney blk_abort_queue(dev->bdev->bd_disk->queue); 290949b25e05SJeff Mahoney } 291049b25e05SJeff Mahoney mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 291149b25e05SJeff Mahoney } 291249b25e05SJeff Mahoney 2913143bede5SJeff Mahoney void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) 29142619ba1fSChris Mason { 29154df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 29162619ba1fSChris Mason radix_tree_delete(&fs_info->fs_roots_radix, 29172619ba1fSChris Mason (unsigned long)root->root_key.objectid); 29184df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 291976dda93cSYan, Zheng 292076dda93cSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) 292176dda93cSYan, Zheng synchronize_srcu(&fs_info->subvol_srcu); 292276dda93cSYan, Zheng 2923581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_pinned); 2924581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_ctl); 29254df27c4dSYan, Zheng free_fs_root(root); 29264df27c4dSYan, Zheng } 29274df27c4dSYan, Zheng 29284df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root) 29294df27c4dSYan, Zheng { 293082d5902dSLi Zefan iput(root->cache_inode); 29314df27c4dSYan, Zheng WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); 29320ee5dc67SAl Viro if (root->anon_dev) 29330ee5dc67SAl Viro free_anon_bdev(root->anon_dev); 29345f39d397SChris Mason free_extent_buffer(root->node); 29355f39d397SChris Mason free_extent_buffer(root->commit_root); 2936581bb050SLi Zefan kfree(root->free_ino_ctl); 2937581bb050SLi Zefan kfree(root->free_ino_pinned); 293858176a96SJosef Bacik kfree(root->name); 29392619ba1fSChris Mason kfree(root); 29402619ba1fSChris Mason } 29412619ba1fSChris Mason 2942143bede5SJeff Mahoney static void del_fs_roots(struct btrfs_fs_info *fs_info) 29430f7d52f4SChris Mason { 29440f7d52f4SChris Mason int ret; 29450f7d52f4SChris Mason struct btrfs_root *gang[8]; 29460f7d52f4SChris Mason int i; 29470f7d52f4SChris Mason 294876dda93cSYan, Zheng while (!list_empty(&fs_info->dead_roots)) { 294976dda93cSYan, Zheng gang[0] = list_entry(fs_info->dead_roots.next, 295076dda93cSYan, Zheng struct btrfs_root, root_list); 295176dda93cSYan, Zheng list_del(&gang[0]->root_list); 295276dda93cSYan, Zheng 295376dda93cSYan, Zheng if (gang[0]->in_radix) { 295476dda93cSYan, Zheng btrfs_free_fs_root(fs_info, gang[0]); 295576dda93cSYan, Zheng } else { 295676dda93cSYan, Zheng free_extent_buffer(gang[0]->node); 295776dda93cSYan, Zheng free_extent_buffer(gang[0]->commit_root); 295876dda93cSYan, Zheng kfree(gang[0]); 295976dda93cSYan, Zheng } 296076dda93cSYan, Zheng } 296176dda93cSYan, Zheng 29620f7d52f4SChris Mason while (1) { 29630f7d52f4SChris Mason ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 29640f7d52f4SChris Mason (void **)gang, 0, 29650f7d52f4SChris Mason ARRAY_SIZE(gang)); 29660f7d52f4SChris Mason if (!ret) 29670f7d52f4SChris Mason break; 29682619ba1fSChris Mason for (i = 0; i < ret; i++) 29695eda7b5eSChris Mason btrfs_free_fs_root(fs_info, gang[i]); 29700f7d52f4SChris Mason } 29710f7d52f4SChris Mason } 2972b4100d64SChris Mason 2973c146afadSYan Zheng int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) 2974c146afadSYan Zheng { 2975c146afadSYan Zheng u64 root_objectid = 0; 2976c146afadSYan Zheng struct btrfs_root *gang[8]; 2977c146afadSYan Zheng int i; 2978c146afadSYan Zheng int ret; 2979c146afadSYan Zheng 2980c146afadSYan Zheng while (1) { 2981c146afadSYan Zheng ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 2982c146afadSYan Zheng (void **)gang, root_objectid, 2983c146afadSYan Zheng ARRAY_SIZE(gang)); 2984c146afadSYan Zheng if (!ret) 2985c146afadSYan Zheng break; 29865d4f98a2SYan Zheng 29875d4f98a2SYan Zheng root_objectid = gang[ret - 1]->root_key.objectid + 1; 2988c146afadSYan Zheng for (i = 0; i < ret; i++) { 298966b4ffd1SJosef Bacik int err; 299066b4ffd1SJosef Bacik 2991c146afadSYan Zheng root_objectid = gang[i]->root_key.objectid; 299266b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(gang[i]); 299366b4ffd1SJosef Bacik if (err) 299466b4ffd1SJosef Bacik return err; 2995c146afadSYan Zheng } 2996c146afadSYan Zheng root_objectid++; 2997c146afadSYan Zheng } 2998c146afadSYan Zheng return 0; 2999c146afadSYan Zheng } 3000c146afadSYan Zheng 3001c146afadSYan Zheng int btrfs_commit_super(struct btrfs_root *root) 3002c146afadSYan Zheng { 3003c146afadSYan Zheng struct btrfs_trans_handle *trans; 3004c146afadSYan Zheng int ret; 3005c146afadSYan Zheng 3006c146afadSYan Zheng mutex_lock(&root->fs_info->cleaner_mutex); 300724bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 3008c146afadSYan Zheng btrfs_clean_old_snapshots(root); 3009c146afadSYan Zheng mutex_unlock(&root->fs_info->cleaner_mutex); 3010c71bf099SYan, Zheng 3011c71bf099SYan, Zheng /* wait until ongoing cleanup work done */ 3012c71bf099SYan, Zheng down_write(&root->fs_info->cleanup_work_sem); 3013c71bf099SYan, Zheng up_write(&root->fs_info->cleanup_work_sem); 3014c71bf099SYan, Zheng 30157a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 30163612b495STsutomu Itoh if (IS_ERR(trans)) 30173612b495STsutomu Itoh return PTR_ERR(trans); 3018c146afadSYan Zheng ret = btrfs_commit_transaction(trans, root); 301979787eaaSJeff Mahoney if (ret) 302079787eaaSJeff Mahoney return ret; 3021c146afadSYan Zheng /* run commit again to drop the original snapshot */ 30227a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 30233612b495STsutomu Itoh if (IS_ERR(trans)) 30243612b495STsutomu Itoh return PTR_ERR(trans); 302579787eaaSJeff Mahoney ret = btrfs_commit_transaction(trans, root); 302679787eaaSJeff Mahoney if (ret) 302779787eaaSJeff Mahoney return ret; 3028c146afadSYan Zheng ret = btrfs_write_and_wait_transaction(NULL, root); 302979787eaaSJeff Mahoney if (ret) { 303079787eaaSJeff Mahoney btrfs_error(root->fs_info, ret, 303179787eaaSJeff Mahoney "Failed to sync btree inode to disk."); 303279787eaaSJeff Mahoney return ret; 303379787eaaSJeff Mahoney } 3034c146afadSYan Zheng 3035a512bbf8SYan Zheng ret = write_ctree_super(NULL, root, 0); 3036c146afadSYan Zheng return ret; 3037c146afadSYan Zheng } 3038c146afadSYan Zheng 3039e20d96d6SChris Mason int close_ctree(struct btrfs_root *root) 3040eb60ceacSChris Mason { 30410f7d52f4SChris Mason struct btrfs_fs_info *fs_info = root->fs_info; 3042c146afadSYan Zheng int ret; 3043e089f05cSChris Mason 3044facda1e7SChris Mason fs_info->closing = 1; 3045a2135011SChris Mason smp_mb(); 3046a2135011SChris Mason 3047837d5b6eSIlya Dryomov /* pause restriper - we want to resume on mount */ 3048837d5b6eSIlya Dryomov btrfs_pause_balance(root->fs_info); 3049837d5b6eSIlya Dryomov 3050a2de733cSArne Jansen btrfs_scrub_cancel(root); 30514cb5300bSChris Mason 30524cb5300bSChris Mason /* wait for any defraggers to finish */ 30534cb5300bSChris Mason wait_event(fs_info->transaction_wait, 30544cb5300bSChris Mason (atomic_read(&fs_info->defrag_running) == 0)); 30554cb5300bSChris Mason 30564cb5300bSChris Mason /* clear out the rbtree of defraggable inodes */ 3057e3029d9fSAl Viro btrfs_run_defrag_inodes(fs_info); 30584cb5300bSChris Mason 3059acce952bSliubo /* 3060acce952bSliubo * Here come 2 situations when btrfs is broken to flip readonly: 3061acce952bSliubo * 3062acce952bSliubo * 1. when btrfs flips readonly somewhere else before 3063acce952bSliubo * btrfs_commit_super, sb->s_flags has MS_RDONLY flag, 3064acce952bSliubo * and btrfs will skip to write sb directly to keep 3065acce952bSliubo * ERROR state on disk. 3066acce952bSliubo * 3067acce952bSliubo * 2. when btrfs flips readonly just in btrfs_commit_super, 3068ae0e47f0SJustin P. Mattock * and in such case, btrfs cannot write sb via btrfs_commit_super, 3069acce952bSliubo * and since fs_state has been set BTRFS_SUPER_FLAG_ERROR flag, 3070acce952bSliubo * btrfs will cleanup all FS resources first and write sb then. 3071acce952bSliubo */ 3072c146afadSYan Zheng if (!(fs_info->sb->s_flags & MS_RDONLY)) { 3073c146afadSYan Zheng ret = btrfs_commit_super(root); 3074d397712bSChris Mason if (ret) 3075d397712bSChris Mason printk(KERN_ERR "btrfs: commit super ret %d\n", ret); 3076c146afadSYan Zheng } 3077ed2ff2cbSChris Mason 3078acce952bSliubo if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { 3079acce952bSliubo ret = btrfs_error_commit_super(root); 3080acce952bSliubo if (ret) 3081acce952bSliubo printk(KERN_ERR "btrfs: commit super ret %d\n", ret); 3082acce952bSliubo } 3083acce952bSliubo 3084300e4f8aSJosef Bacik btrfs_put_block_group_cache(fs_info); 3085300e4f8aSJosef Bacik 3086e3029d9fSAl Viro kthread_stop(fs_info->transaction_kthread); 3087e3029d9fSAl Viro kthread_stop(fs_info->cleaner_kthread); 30888929ecfaSYan, Zheng 3089f25784b3SYan Zheng fs_info->closing = 2; 3090f25784b3SYan Zheng smp_mb(); 3091f25784b3SYan Zheng 3092b0c68f8bSChris Mason if (fs_info->delalloc_bytes) { 3093d397712bSChris Mason printk(KERN_INFO "btrfs: at unmount delalloc count %llu\n", 309421380931SJoel Becker (unsigned long long)fs_info->delalloc_bytes); 3095b0c68f8bSChris Mason } 309631153d81SYan Zheng if (fs_info->total_ref_cache_size) { 3097d397712bSChris Mason printk(KERN_INFO "btrfs: at umount reference cache size %llu\n", 3098d397712bSChris Mason (unsigned long long)fs_info->total_ref_cache_size); 309931153d81SYan Zheng } 310031153d81SYan Zheng 31015f39d397SChris Mason free_extent_buffer(fs_info->extent_root->node); 31025d4f98a2SYan Zheng free_extent_buffer(fs_info->extent_root->commit_root); 31035f39d397SChris Mason free_extent_buffer(fs_info->tree_root->node); 31045d4f98a2SYan Zheng free_extent_buffer(fs_info->tree_root->commit_root); 3105e3029d9fSAl Viro free_extent_buffer(fs_info->chunk_root->node); 3106e3029d9fSAl Viro free_extent_buffer(fs_info->chunk_root->commit_root); 3107e3029d9fSAl Viro free_extent_buffer(fs_info->dev_root->node); 3108e3029d9fSAl Viro free_extent_buffer(fs_info->dev_root->commit_root); 3109e3029d9fSAl Viro free_extent_buffer(fs_info->csum_root->node); 3110e3029d9fSAl Viro free_extent_buffer(fs_info->csum_root->commit_root); 3111d20f7043SChris Mason 3112e3029d9fSAl Viro btrfs_free_block_groups(fs_info); 3113c146afadSYan Zheng 31140f7d52f4SChris Mason del_fs_roots(fs_info); 3115d10c5f31SChris Mason 3116c146afadSYan Zheng iput(fs_info->btree_inode); 31179ad6b7bcSChris Mason 311861d92c32SChris Mason btrfs_stop_workers(&fs_info->generic_worker); 3119247e743cSChris Mason btrfs_stop_workers(&fs_info->fixup_workers); 3120771ed689SChris Mason btrfs_stop_workers(&fs_info->delalloc_workers); 31218b712842SChris Mason btrfs_stop_workers(&fs_info->workers); 31228b712842SChris Mason btrfs_stop_workers(&fs_info->endio_workers); 3123d20f7043SChris Mason btrfs_stop_workers(&fs_info->endio_meta_workers); 3124cad321adSChris Mason btrfs_stop_workers(&fs_info->endio_meta_write_workers); 3125e6dcd2dcSChris Mason btrfs_stop_workers(&fs_info->endio_write_workers); 31260cb59c99SJosef Bacik btrfs_stop_workers(&fs_info->endio_freespace_worker); 31271cc127b5SChris Mason btrfs_stop_workers(&fs_info->submit_workers); 312816cdcec7SMiao Xie btrfs_stop_workers(&fs_info->delayed_workers); 3129bab39bf9SJosef Bacik btrfs_stop_workers(&fs_info->caching_workers); 313090519d66SArne Jansen btrfs_stop_workers(&fs_info->readahead_workers); 3131d6bfde87SChris Mason 313221adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 313321adbd5cSStefan Behrens if (btrfs_test_opt(root, CHECK_INTEGRITY)) 313421adbd5cSStefan Behrens btrfsic_unmount(root, fs_info->fs_devices); 313521adbd5cSStefan Behrens #endif 313621adbd5cSStefan Behrens 3137dfe25020SChris Mason btrfs_close_devices(fs_info->fs_devices); 31380b86a832SChris Mason btrfs_mapping_tree_free(&fs_info->mapping_tree); 3139b248a415SChris Mason 314004160088SChris Mason bdi_destroy(&fs_info->bdi); 314176dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 31420b86a832SChris Mason 3143eb60ceacSChris Mason return 0; 3144eb60ceacSChris Mason } 3145eb60ceacSChris Mason 31461259ab75SChris Mason int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid) 3147ccd467d6SChris Mason { 31481259ab75SChris Mason int ret; 3149727011e0SChris Mason struct inode *btree_inode = buf->pages[0]->mapping->host; 31501259ab75SChris Mason 31510b32f4bbSJosef Bacik ret = extent_buffer_uptodate(buf); 31521259ab75SChris Mason if (!ret) 31531259ab75SChris Mason return ret; 31541259ab75SChris Mason 31551259ab75SChris Mason ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, 31561259ab75SChris Mason parent_transid); 31571259ab75SChris Mason return !ret; 31585f39d397SChris Mason } 31596702ed49SChris Mason 31605f39d397SChris Mason int btrfs_set_buffer_uptodate(struct extent_buffer *buf) 31615f39d397SChris Mason { 31620b32f4bbSJosef Bacik return set_extent_buffer_uptodate(buf); 31635f39d397SChris Mason } 31645f39d397SChris Mason 31655f39d397SChris Mason void btrfs_mark_buffer_dirty(struct extent_buffer *buf) 31665f39d397SChris Mason { 3167727011e0SChris Mason struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; 31685f39d397SChris Mason u64 transid = btrfs_header_generation(buf); 3169b9473439SChris Mason int was_dirty; 3170b4ce94deSChris Mason 3171b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 3172ccd467d6SChris Mason if (transid != root->fs_info->generation) { 3173d397712bSChris Mason printk(KERN_CRIT "btrfs transid mismatch buffer %llu, " 3174d397712bSChris Mason "found %llu running %llu\n", 3175db94535dSChris Mason (unsigned long long)buf->start, 3176d397712bSChris Mason (unsigned long long)transid, 3177d397712bSChris Mason (unsigned long long)root->fs_info->generation); 3178ccd467d6SChris Mason WARN_ON(1); 3179ccd467d6SChris Mason } 31800b32f4bbSJosef Bacik was_dirty = set_extent_buffer_dirty(buf); 3181b9473439SChris Mason if (!was_dirty) { 3182b9473439SChris Mason spin_lock(&root->fs_info->delalloc_lock); 3183b9473439SChris Mason root->fs_info->dirty_metadata_bytes += buf->len; 3184b9473439SChris Mason spin_unlock(&root->fs_info->delalloc_lock); 3185b9473439SChris Mason } 3186eb60ceacSChris Mason } 3187eb60ceacSChris Mason 3188d3c2fdcfSChris Mason void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) 318935b7e476SChris Mason { 3190188de649SChris Mason /* 3191188de649SChris Mason * looks as though older kernels can get into trouble with 3192188de649SChris Mason * this code, they end up stuck in balance_dirty_pages forever 3193188de649SChris Mason */ 3194d6bfde87SChris Mason u64 num_dirty; 3195771ed689SChris Mason unsigned long thresh = 32 * 1024 * 1024; 3196d6bfde87SChris Mason 31976933c02eSJens Axboe if (current->flags & PF_MEMALLOC) 3198d6bfde87SChris Mason return; 3199d6bfde87SChris Mason 320016cdcec7SMiao Xie btrfs_balance_delayed_items(root); 320116cdcec7SMiao Xie 320216cdcec7SMiao Xie num_dirty = root->fs_info->dirty_metadata_bytes; 320316cdcec7SMiao Xie 320416cdcec7SMiao Xie if (num_dirty > thresh) { 320516cdcec7SMiao Xie balance_dirty_pages_ratelimited_nr( 320616cdcec7SMiao Xie root->fs_info->btree_inode->i_mapping, 1); 320716cdcec7SMiao Xie } 320816cdcec7SMiao Xie return; 320916cdcec7SMiao Xie } 321016cdcec7SMiao Xie 321116cdcec7SMiao Xie void __btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) 321216cdcec7SMiao Xie { 321316cdcec7SMiao Xie /* 321416cdcec7SMiao Xie * looks as though older kernels can get into trouble with 321516cdcec7SMiao Xie * this code, they end up stuck in balance_dirty_pages forever 321616cdcec7SMiao Xie */ 321716cdcec7SMiao Xie u64 num_dirty; 321816cdcec7SMiao Xie unsigned long thresh = 32 * 1024 * 1024; 321916cdcec7SMiao Xie 322016cdcec7SMiao Xie if (current->flags & PF_MEMALLOC) 322116cdcec7SMiao Xie return; 322216cdcec7SMiao Xie 3223585ad2c3SChris Mason num_dirty = root->fs_info->dirty_metadata_bytes; 3224585ad2c3SChris Mason 3225d6bfde87SChris Mason if (num_dirty > thresh) { 3226d3c2fdcfSChris Mason balance_dirty_pages_ratelimited_nr( 3227304fced6SChris Mason root->fs_info->btree_inode->i_mapping, 1); 322835b7e476SChris Mason } 3229188de649SChris Mason return; 3230d6bfde87SChris Mason } 32316b80053dSChris Mason 3232ca7a79adSChris Mason int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) 32336b80053dSChris Mason { 3234727011e0SChris Mason struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; 32350b32f4bbSJosef Bacik return btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 32366b80053dSChris Mason } 32370da5468fSChris Mason 323801d658f2SChris Mason static int btree_lock_page_hook(struct page *page, void *data, 323901d658f2SChris Mason void (*flush_fn)(void *)) 32404bef0848SChris Mason { 32414bef0848SChris Mason struct inode *inode = page->mapping->host; 3242b9473439SChris Mason struct btrfs_root *root = BTRFS_I(inode)->root; 32434bef0848SChris Mason struct extent_buffer *eb; 32444bef0848SChris Mason 32454f2de97aSJosef Bacik /* 32464f2de97aSJosef Bacik * We culled this eb but the page is still hanging out on the mapping, 32474f2de97aSJosef Bacik * carry on. 32484f2de97aSJosef Bacik */ 32494f2de97aSJosef Bacik if (!PagePrivate(page)) 32504bef0848SChris Mason goto out; 32514bef0848SChris Mason 32524f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 32534f2de97aSJosef Bacik if (!eb) { 32544f2de97aSJosef Bacik WARN_ON(1); 32554f2de97aSJosef Bacik goto out; 32564f2de97aSJosef Bacik } 32574f2de97aSJosef Bacik if (page != eb->pages[0]) 32584bef0848SChris Mason goto out; 32594bef0848SChris Mason 326001d658f2SChris Mason if (!btrfs_try_tree_write_lock(eb)) { 326101d658f2SChris Mason flush_fn(data); 32624bef0848SChris Mason btrfs_tree_lock(eb); 326301d658f2SChris Mason } 32644bef0848SChris Mason btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN); 3265b9473439SChris Mason 3266b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)) { 3267b9473439SChris Mason spin_lock(&root->fs_info->delalloc_lock); 3268b9473439SChris Mason if (root->fs_info->dirty_metadata_bytes >= eb->len) 3269b9473439SChris Mason root->fs_info->dirty_metadata_bytes -= eb->len; 3270b9473439SChris Mason else 3271b9473439SChris Mason WARN_ON(1); 3272b9473439SChris Mason spin_unlock(&root->fs_info->delalloc_lock); 3273b9473439SChris Mason } 3274b9473439SChris Mason 32754bef0848SChris Mason btrfs_tree_unlock(eb); 32764bef0848SChris Mason out: 327701d658f2SChris Mason if (!trylock_page(page)) { 327801d658f2SChris Mason flush_fn(data); 32794bef0848SChris Mason lock_page(page); 328001d658f2SChris Mason } 32814bef0848SChris Mason return 0; 32824bef0848SChris Mason } 32834bef0848SChris Mason 3284fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 3285acce952bSliubo int read_only) 3286acce952bSliubo { 3287fcd1f065SDavid Sterba if (btrfs_super_csum_type(fs_info->super_copy) >= ARRAY_SIZE(btrfs_csum_sizes)) { 3288fcd1f065SDavid Sterba printk(KERN_ERR "btrfs: unsupported checksum algorithm\n"); 3289fcd1f065SDavid Sterba return -EINVAL; 3290fcd1f065SDavid Sterba } 3291acce952bSliubo 3292fcd1f065SDavid Sterba if (read_only) 3293fcd1f065SDavid Sterba return 0; 3294fcd1f065SDavid Sterba 3295fcd1f065SDavid Sterba if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { 3296acce952bSliubo printk(KERN_WARNING "warning: mount fs with errors, " 3297acce952bSliubo "running btrfsck is recommended\n"); 3298acce952bSliubo } 3299acce952bSliubo 3300fcd1f065SDavid Sterba return 0; 3301fcd1f065SDavid Sterba } 3302fcd1f065SDavid Sterba 3303acce952bSliubo int btrfs_error_commit_super(struct btrfs_root *root) 3304acce952bSliubo { 3305acce952bSliubo int ret; 3306acce952bSliubo 3307acce952bSliubo mutex_lock(&root->fs_info->cleaner_mutex); 3308acce952bSliubo btrfs_run_delayed_iputs(root); 3309acce952bSliubo mutex_unlock(&root->fs_info->cleaner_mutex); 3310acce952bSliubo 3311acce952bSliubo down_write(&root->fs_info->cleanup_work_sem); 3312acce952bSliubo up_write(&root->fs_info->cleanup_work_sem); 3313acce952bSliubo 3314acce952bSliubo /* cleanup FS via transaction */ 3315acce952bSliubo btrfs_cleanup_transaction(root); 3316acce952bSliubo 3317acce952bSliubo ret = write_ctree_super(NULL, root, 0); 3318acce952bSliubo 3319acce952bSliubo return ret; 3320acce952bSliubo } 3321acce952bSliubo 3322143bede5SJeff Mahoney static void btrfs_destroy_ordered_operations(struct btrfs_root *root) 3323acce952bSliubo { 3324acce952bSliubo struct btrfs_inode *btrfs_inode; 3325acce952bSliubo struct list_head splice; 3326acce952bSliubo 3327acce952bSliubo INIT_LIST_HEAD(&splice); 3328acce952bSliubo 3329acce952bSliubo mutex_lock(&root->fs_info->ordered_operations_mutex); 3330acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3331acce952bSliubo 3332acce952bSliubo list_splice_init(&root->fs_info->ordered_operations, &splice); 3333acce952bSliubo while (!list_empty(&splice)) { 3334acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3335acce952bSliubo ordered_operations); 3336acce952bSliubo 3337acce952bSliubo list_del_init(&btrfs_inode->ordered_operations); 3338acce952bSliubo 3339acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3340acce952bSliubo } 3341acce952bSliubo 3342acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3343acce952bSliubo mutex_unlock(&root->fs_info->ordered_operations_mutex); 3344acce952bSliubo } 3345acce952bSliubo 3346143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root) 3347acce952bSliubo { 3348acce952bSliubo struct list_head splice; 3349acce952bSliubo struct btrfs_ordered_extent *ordered; 3350acce952bSliubo struct inode *inode; 3351acce952bSliubo 3352acce952bSliubo INIT_LIST_HEAD(&splice); 3353acce952bSliubo 3354acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3355acce952bSliubo 3356acce952bSliubo list_splice_init(&root->fs_info->ordered_extents, &splice); 3357acce952bSliubo while (!list_empty(&splice)) { 3358acce952bSliubo ordered = list_entry(splice.next, struct btrfs_ordered_extent, 3359acce952bSliubo root_extent_list); 3360acce952bSliubo 3361acce952bSliubo list_del_init(&ordered->root_extent_list); 3362acce952bSliubo atomic_inc(&ordered->refs); 3363acce952bSliubo 3364acce952bSliubo /* the inode may be getting freed (in sys_unlink path). */ 3365acce952bSliubo inode = igrab(ordered->inode); 3366acce952bSliubo 3367acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3368acce952bSliubo if (inode) 3369acce952bSliubo iput(inode); 3370acce952bSliubo 3371acce952bSliubo atomic_set(&ordered->refs, 1); 3372acce952bSliubo btrfs_put_ordered_extent(ordered); 3373acce952bSliubo 3374acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3375acce952bSliubo } 3376acce952bSliubo 3377acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3378acce952bSliubo } 3379acce952bSliubo 338079787eaaSJeff Mahoney int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 3381acce952bSliubo struct btrfs_root *root) 3382acce952bSliubo { 3383acce952bSliubo struct rb_node *node; 3384acce952bSliubo struct btrfs_delayed_ref_root *delayed_refs; 3385acce952bSliubo struct btrfs_delayed_ref_node *ref; 3386acce952bSliubo int ret = 0; 3387acce952bSliubo 3388acce952bSliubo delayed_refs = &trans->delayed_refs; 3389acce952bSliubo 339079787eaaSJeff Mahoney again: 3391acce952bSliubo spin_lock(&delayed_refs->lock); 3392acce952bSliubo if (delayed_refs->num_entries == 0) { 3393cfece4dbSDavid Sterba spin_unlock(&delayed_refs->lock); 3394acce952bSliubo printk(KERN_INFO "delayed_refs has NO entry\n"); 3395acce952bSliubo return ret; 3396acce952bSliubo } 3397acce952bSliubo 3398acce952bSliubo node = rb_first(&delayed_refs->root); 3399acce952bSliubo while (node) { 3400acce952bSliubo ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node); 3401acce952bSliubo node = rb_next(node); 3402acce952bSliubo 3403acce952bSliubo ref->in_tree = 0; 3404acce952bSliubo rb_erase(&ref->rb_node, &delayed_refs->root); 3405acce952bSliubo delayed_refs->num_entries--; 3406acce952bSliubo 3407acce952bSliubo atomic_set(&ref->refs, 1); 3408acce952bSliubo if (btrfs_delayed_ref_is_head(ref)) { 3409acce952bSliubo struct btrfs_delayed_ref_head *head; 3410acce952bSliubo 3411acce952bSliubo head = btrfs_delayed_node_to_head(ref); 341279787eaaSJeff Mahoney spin_unlock(&delayed_refs->lock); 3413acce952bSliubo mutex_lock(&head->mutex); 3414acce952bSliubo kfree(head->extent_op); 3415acce952bSliubo delayed_refs->num_heads--; 3416acce952bSliubo if (list_empty(&head->cluster)) 3417acce952bSliubo delayed_refs->num_heads_ready--; 3418acce952bSliubo list_del_init(&head->cluster); 3419acce952bSliubo mutex_unlock(&head->mutex); 342079787eaaSJeff Mahoney btrfs_put_delayed_ref(ref); 342179787eaaSJeff Mahoney goto again; 3422acce952bSliubo } 3423acce952bSliubo spin_unlock(&delayed_refs->lock); 3424acce952bSliubo btrfs_put_delayed_ref(ref); 3425acce952bSliubo 3426acce952bSliubo cond_resched(); 3427acce952bSliubo spin_lock(&delayed_refs->lock); 3428acce952bSliubo } 3429acce952bSliubo 3430acce952bSliubo spin_unlock(&delayed_refs->lock); 3431acce952bSliubo 3432acce952bSliubo return ret; 3433acce952bSliubo } 3434acce952bSliubo 3435143bede5SJeff Mahoney static void btrfs_destroy_pending_snapshots(struct btrfs_transaction *t) 3436acce952bSliubo { 3437acce952bSliubo struct btrfs_pending_snapshot *snapshot; 3438acce952bSliubo struct list_head splice; 3439acce952bSliubo 3440acce952bSliubo INIT_LIST_HEAD(&splice); 3441acce952bSliubo 3442acce952bSliubo list_splice_init(&t->pending_snapshots, &splice); 3443acce952bSliubo 3444acce952bSliubo while (!list_empty(&splice)) { 3445acce952bSliubo snapshot = list_entry(splice.next, 3446acce952bSliubo struct btrfs_pending_snapshot, 3447acce952bSliubo list); 3448acce952bSliubo 3449acce952bSliubo list_del_init(&snapshot->list); 3450acce952bSliubo 3451acce952bSliubo kfree(snapshot); 3452acce952bSliubo } 3453acce952bSliubo } 3454acce952bSliubo 3455143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) 3456acce952bSliubo { 3457acce952bSliubo struct btrfs_inode *btrfs_inode; 3458acce952bSliubo struct list_head splice; 3459acce952bSliubo 3460acce952bSliubo INIT_LIST_HEAD(&splice); 3461acce952bSliubo 3462acce952bSliubo spin_lock(&root->fs_info->delalloc_lock); 34635be76758SDavid Sterba list_splice_init(&root->fs_info->delalloc_inodes, &splice); 3464acce952bSliubo 3465acce952bSliubo while (!list_empty(&splice)) { 3466acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3467acce952bSliubo delalloc_inodes); 3468acce952bSliubo 3469acce952bSliubo list_del_init(&btrfs_inode->delalloc_inodes); 3470acce952bSliubo 3471acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3472acce952bSliubo } 3473acce952bSliubo 3474acce952bSliubo spin_unlock(&root->fs_info->delalloc_lock); 3475acce952bSliubo } 3476acce952bSliubo 3477acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 3478acce952bSliubo struct extent_io_tree *dirty_pages, 3479acce952bSliubo int mark) 3480acce952bSliubo { 3481acce952bSliubo int ret; 3482acce952bSliubo struct page *page; 3483acce952bSliubo struct inode *btree_inode = root->fs_info->btree_inode; 3484acce952bSliubo struct extent_buffer *eb; 3485acce952bSliubo u64 start = 0; 3486acce952bSliubo u64 end; 3487acce952bSliubo u64 offset; 3488acce952bSliubo unsigned long index; 3489acce952bSliubo 3490acce952bSliubo while (1) { 3491acce952bSliubo ret = find_first_extent_bit(dirty_pages, start, &start, &end, 3492acce952bSliubo mark); 3493acce952bSliubo if (ret) 3494acce952bSliubo break; 3495acce952bSliubo 3496acce952bSliubo clear_extent_bits(dirty_pages, start, end, mark, GFP_NOFS); 3497acce952bSliubo while (start <= end) { 3498acce952bSliubo index = start >> PAGE_CACHE_SHIFT; 3499acce952bSliubo start = (u64)(index + 1) << PAGE_CACHE_SHIFT; 3500acce952bSliubo page = find_get_page(btree_inode->i_mapping, index); 3501acce952bSliubo if (!page) 3502acce952bSliubo continue; 3503acce952bSliubo offset = page_offset(page); 3504acce952bSliubo 3505acce952bSliubo spin_lock(&dirty_pages->buffer_lock); 3506acce952bSliubo eb = radix_tree_lookup( 3507acce952bSliubo &(&BTRFS_I(page->mapping->host)->io_tree)->buffer, 3508acce952bSliubo offset >> PAGE_CACHE_SHIFT); 3509acce952bSliubo spin_unlock(&dirty_pages->buffer_lock); 3510acce952bSliubo if (eb) { 3511acce952bSliubo ret = test_and_clear_bit(EXTENT_BUFFER_DIRTY, 3512acce952bSliubo &eb->bflags); 3513acce952bSliubo atomic_set(&eb->refs, 1); 3514acce952bSliubo } 3515acce952bSliubo if (PageWriteback(page)) 3516acce952bSliubo end_page_writeback(page); 3517acce952bSliubo 3518acce952bSliubo lock_page(page); 3519acce952bSliubo if (PageDirty(page)) { 3520acce952bSliubo clear_page_dirty_for_io(page); 3521acce952bSliubo spin_lock_irq(&page->mapping->tree_lock); 3522acce952bSliubo radix_tree_tag_clear(&page->mapping->page_tree, 3523acce952bSliubo page_index(page), 3524acce952bSliubo PAGECACHE_TAG_DIRTY); 3525acce952bSliubo spin_unlock_irq(&page->mapping->tree_lock); 3526acce952bSliubo } 3527acce952bSliubo 3528acce952bSliubo page->mapping->a_ops->invalidatepage(page, 0); 3529acce952bSliubo unlock_page(page); 3530acce952bSliubo } 3531acce952bSliubo } 3532acce952bSliubo 3533acce952bSliubo return ret; 3534acce952bSliubo } 3535acce952bSliubo 3536acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 3537acce952bSliubo struct extent_io_tree *pinned_extents) 3538acce952bSliubo { 3539acce952bSliubo struct extent_io_tree *unpin; 3540acce952bSliubo u64 start; 3541acce952bSliubo u64 end; 3542acce952bSliubo int ret; 3543acce952bSliubo 3544acce952bSliubo unpin = pinned_extents; 3545acce952bSliubo while (1) { 3546acce952bSliubo ret = find_first_extent_bit(unpin, 0, &start, &end, 3547acce952bSliubo EXTENT_DIRTY); 3548acce952bSliubo if (ret) 3549acce952bSliubo break; 3550acce952bSliubo 3551acce952bSliubo /* opt_discard */ 35525378e607SLi Dongyang if (btrfs_test_opt(root, DISCARD)) 35535378e607SLi Dongyang ret = btrfs_error_discard_extent(root, start, 35545378e607SLi Dongyang end + 1 - start, 35555378e607SLi Dongyang NULL); 3556acce952bSliubo 3557acce952bSliubo clear_extent_dirty(unpin, start, end, GFP_NOFS); 3558acce952bSliubo btrfs_error_unpin_extent_range(root, start, end); 3559acce952bSliubo cond_resched(); 3560acce952bSliubo } 3561acce952bSliubo 3562acce952bSliubo return 0; 3563acce952bSliubo } 3564acce952bSliubo 356549b25e05SJeff Mahoney void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, 356649b25e05SJeff Mahoney struct btrfs_root *root) 356749b25e05SJeff Mahoney { 356849b25e05SJeff Mahoney btrfs_destroy_delayed_refs(cur_trans, root); 356949b25e05SJeff Mahoney btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv, 357049b25e05SJeff Mahoney cur_trans->dirty_pages.dirty_bytes); 357149b25e05SJeff Mahoney 357249b25e05SJeff Mahoney /* FIXME: cleanup wait for commit */ 357349b25e05SJeff Mahoney cur_trans->in_commit = 1; 357449b25e05SJeff Mahoney cur_trans->blocked = 1; 357549b25e05SJeff Mahoney if (waitqueue_active(&root->fs_info->transaction_blocked_wait)) 357649b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_blocked_wait); 357749b25e05SJeff Mahoney 357849b25e05SJeff Mahoney cur_trans->blocked = 0; 357949b25e05SJeff Mahoney if (waitqueue_active(&root->fs_info->transaction_wait)) 358049b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_wait); 358149b25e05SJeff Mahoney 358249b25e05SJeff Mahoney cur_trans->commit_done = 1; 358349b25e05SJeff Mahoney if (waitqueue_active(&cur_trans->commit_wait)) 358449b25e05SJeff Mahoney wake_up(&cur_trans->commit_wait); 358549b25e05SJeff Mahoney 358649b25e05SJeff Mahoney btrfs_destroy_pending_snapshots(cur_trans); 358749b25e05SJeff Mahoney 358849b25e05SJeff Mahoney btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, 358949b25e05SJeff Mahoney EXTENT_DIRTY); 359049b25e05SJeff Mahoney 359149b25e05SJeff Mahoney /* 359249b25e05SJeff Mahoney memset(cur_trans, 0, sizeof(*cur_trans)); 359349b25e05SJeff Mahoney kmem_cache_free(btrfs_transaction_cachep, cur_trans); 359449b25e05SJeff Mahoney */ 359549b25e05SJeff Mahoney } 359649b25e05SJeff Mahoney 359749b25e05SJeff Mahoney int btrfs_cleanup_transaction(struct btrfs_root *root) 3598acce952bSliubo { 3599acce952bSliubo struct btrfs_transaction *t; 3600acce952bSliubo LIST_HEAD(list); 3601acce952bSliubo 3602acce952bSliubo mutex_lock(&root->fs_info->transaction_kthread_mutex); 3603acce952bSliubo 3604a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3605acce952bSliubo list_splice_init(&root->fs_info->trans_list, &list); 3606a4abeea4SJosef Bacik root->fs_info->trans_no_join = 1; 3607a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3608a4abeea4SJosef Bacik 3609acce952bSliubo while (!list_empty(&list)) { 3610acce952bSliubo t = list_entry(list.next, struct btrfs_transaction, list); 3611acce952bSliubo if (!t) 3612acce952bSliubo break; 3613acce952bSliubo 3614acce952bSliubo btrfs_destroy_ordered_operations(root); 3615acce952bSliubo 3616acce952bSliubo btrfs_destroy_ordered_extents(root); 3617acce952bSliubo 3618acce952bSliubo btrfs_destroy_delayed_refs(t, root); 3619acce952bSliubo 3620acce952bSliubo btrfs_block_rsv_release(root, 3621acce952bSliubo &root->fs_info->trans_block_rsv, 3622acce952bSliubo t->dirty_pages.dirty_bytes); 3623acce952bSliubo 3624acce952bSliubo /* FIXME: cleanup wait for commit */ 3625acce952bSliubo t->in_commit = 1; 3626acce952bSliubo t->blocked = 1; 3627acce952bSliubo if (waitqueue_active(&root->fs_info->transaction_blocked_wait)) 3628acce952bSliubo wake_up(&root->fs_info->transaction_blocked_wait); 3629acce952bSliubo 3630acce952bSliubo t->blocked = 0; 3631acce952bSliubo if (waitqueue_active(&root->fs_info->transaction_wait)) 3632acce952bSliubo wake_up(&root->fs_info->transaction_wait); 3633acce952bSliubo 3634acce952bSliubo t->commit_done = 1; 3635acce952bSliubo if (waitqueue_active(&t->commit_wait)) 3636acce952bSliubo wake_up(&t->commit_wait); 3637acce952bSliubo 3638acce952bSliubo btrfs_destroy_pending_snapshots(t); 3639acce952bSliubo 3640acce952bSliubo btrfs_destroy_delalloc_inodes(root); 3641acce952bSliubo 3642a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3643acce952bSliubo root->fs_info->running_transaction = NULL; 3644a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3645acce952bSliubo 3646acce952bSliubo btrfs_destroy_marked_extents(root, &t->dirty_pages, 3647acce952bSliubo EXTENT_DIRTY); 3648acce952bSliubo 3649acce952bSliubo btrfs_destroy_pinned_extent(root, 3650acce952bSliubo root->fs_info->pinned_extents); 3651acce952bSliubo 365213c5a93eSJosef Bacik atomic_set(&t->use_count, 0); 3653acce952bSliubo list_del_init(&t->list); 3654acce952bSliubo memset(t, 0, sizeof(*t)); 3655acce952bSliubo kmem_cache_free(btrfs_transaction_cachep, t); 3656acce952bSliubo } 3657acce952bSliubo 3658a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3659a4abeea4SJosef Bacik root->fs_info->trans_no_join = 0; 3660a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3661acce952bSliubo mutex_unlock(&root->fs_info->transaction_kthread_mutex); 3662acce952bSliubo 3663acce952bSliubo return 0; 3664acce952bSliubo } 3665acce952bSliubo 366679787eaaSJeff Mahoney static int btree_writepage_io_failed_hook(struct bio *bio, struct page *page, 366779787eaaSJeff Mahoney u64 start, u64 end, 366879787eaaSJeff Mahoney struct extent_state *state) 366979787eaaSJeff Mahoney { 367079787eaaSJeff Mahoney struct super_block *sb = page->mapping->host->i_sb; 367179787eaaSJeff Mahoney struct btrfs_fs_info *fs_info = btrfs_sb(sb); 367279787eaaSJeff Mahoney btrfs_error(fs_info, -EIO, 367379787eaaSJeff Mahoney "Error occured while writing out btree at %llu", start); 367479787eaaSJeff Mahoney return -EIO; 367579787eaaSJeff Mahoney } 367679787eaaSJeff Mahoney 3677d1310b2eSChris Mason static struct extent_io_ops btree_extent_io_ops = { 36784bef0848SChris Mason .write_cache_pages_lock_hook = btree_lock_page_hook, 3679ce9adaa5SChris Mason .readpage_end_io_hook = btree_readpage_end_io_hook, 36804bb31e92SArne Jansen .readpage_io_failed_hook = btree_io_failed_hook, 36810b86a832SChris Mason .submit_bio_hook = btree_submit_bio_hook, 3682239b14b3SChris Mason /* note we're sharing with inode.c for the merge bio hook */ 3683239b14b3SChris Mason .merge_bio_hook = btrfs_merge_bio_hook, 368479787eaaSJeff Mahoney .writepage_io_failed_hook = btree_writepage_io_failed_hook, 36850da5468fSChris Mason }; 3686