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); 51acce952bSliubo static void 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; 10144b8bd7eSChris Mason }; 10244b8bd7eSChris Mason 10385d4e461SChris Mason /* 10485d4e461SChris Mason * Lockdep class keys for extent_buffer->lock's in this root. For a given 10585d4e461SChris Mason * eb, the lockdep key is determined by the btrfs_root it belongs to and 10685d4e461SChris Mason * the level the eb occupies in the tree. 1074008c04aSChris Mason * 10885d4e461SChris Mason * Different roots are used for different purposes and may nest inside each 10985d4e461SChris Mason * other and they require separate keysets. As lockdep keys should be 11085d4e461SChris Mason * static, assign keysets according to the purpose of the root as indicated 11185d4e461SChris Mason * by btrfs_root->objectid. This ensures that all special purpose roots 11285d4e461SChris Mason * have separate keysets. 1134008c04aSChris Mason * 11485d4e461SChris Mason * Lock-nesting across peer nodes is always done with the immediate parent 11585d4e461SChris Mason * node locked thus preventing deadlock. As lockdep doesn't know this, use 11685d4e461SChris Mason * subclass to avoid triggering lockdep warning in such cases. 1174008c04aSChris Mason * 11885d4e461SChris Mason * The key is set by the readpage_end_io_hook after the buffer has passed 11985d4e461SChris Mason * csum validation but before the pages are unlocked. It is also set by 12085d4e461SChris Mason * btrfs_init_new_buffer on freshly allocated blocks. 12185d4e461SChris Mason * 12285d4e461SChris Mason * We also add a check to make sure the highest level of the tree is the 12385d4e461SChris Mason * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code 12485d4e461SChris Mason * needs update as well. 1254008c04aSChris Mason */ 1264008c04aSChris Mason #ifdef CONFIG_DEBUG_LOCK_ALLOC 1274008c04aSChris Mason # if BTRFS_MAX_LEVEL != 8 1284008c04aSChris Mason # error 1294008c04aSChris Mason # endif 13085d4e461SChris Mason 13185d4e461SChris Mason static struct btrfs_lockdep_keyset { 13285d4e461SChris Mason u64 id; /* root objectid */ 13385d4e461SChris Mason const char *name_stem; /* lock name stem */ 13485d4e461SChris Mason char names[BTRFS_MAX_LEVEL + 1][20]; 13585d4e461SChris Mason struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; 13685d4e461SChris Mason } btrfs_lockdep_keysets[] = { 13785d4e461SChris Mason { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, 13885d4e461SChris Mason { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, 13985d4e461SChris Mason { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, 14085d4e461SChris Mason { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, 14185d4e461SChris Mason { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, 14285d4e461SChris Mason { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, 14385d4e461SChris Mason { .id = BTRFS_ORPHAN_OBJECTID, .name_stem = "orphan" }, 14485d4e461SChris Mason { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, 14585d4e461SChris Mason { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, 14685d4e461SChris Mason { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, 14785d4e461SChris Mason { .id = 0, .name_stem = "tree" }, 1484008c04aSChris Mason }; 14985d4e461SChris Mason 15085d4e461SChris Mason void __init btrfs_init_lockdep(void) 15185d4e461SChris Mason { 15285d4e461SChris Mason int i, j; 15385d4e461SChris Mason 15485d4e461SChris Mason /* initialize lockdep class names */ 15585d4e461SChris Mason for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { 15685d4e461SChris Mason struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; 15785d4e461SChris Mason 15885d4e461SChris Mason for (j = 0; j < ARRAY_SIZE(ks->names); j++) 15985d4e461SChris Mason snprintf(ks->names[j], sizeof(ks->names[j]), 16085d4e461SChris Mason "btrfs-%s-%02d", ks->name_stem, j); 16185d4e461SChris Mason } 16285d4e461SChris Mason } 16385d4e461SChris Mason 16485d4e461SChris Mason void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, 16585d4e461SChris Mason int level) 16685d4e461SChris Mason { 16785d4e461SChris Mason struct btrfs_lockdep_keyset *ks; 16885d4e461SChris Mason 16985d4e461SChris Mason BUG_ON(level >= ARRAY_SIZE(ks->keys)); 17085d4e461SChris Mason 17185d4e461SChris Mason /* find the matching keyset, id 0 is the default entry */ 17285d4e461SChris Mason for (ks = btrfs_lockdep_keysets; ks->id; ks++) 17385d4e461SChris Mason if (ks->id == objectid) 17485d4e461SChris Mason break; 17585d4e461SChris Mason 17685d4e461SChris Mason lockdep_set_class_and_name(&eb->lock, 17785d4e461SChris Mason &ks->keys[level], ks->names[level]); 17885d4e461SChris Mason } 17985d4e461SChris Mason 1804008c04aSChris Mason #endif 1814008c04aSChris Mason 182d352ac68SChris Mason /* 183d352ac68SChris Mason * extents on the btree inode are pretty simple, there's one extent 184d352ac68SChris Mason * that covers the entire device 185d352ac68SChris Mason */ 186b2950863SChristoph Hellwig static struct extent_map *btree_get_extent(struct inode *inode, 187306e16ceSDavid Sterba struct page *page, size_t pg_offset, u64 start, u64 len, 1885f39d397SChris Mason int create) 1895f39d397SChris Mason { 1905f39d397SChris Mason struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; 1915f39d397SChris Mason struct extent_map *em; 1925f39d397SChris Mason int ret; 1935f39d397SChris Mason 194890871beSChris Mason read_lock(&em_tree->lock); 195d1310b2eSChris Mason em = lookup_extent_mapping(em_tree, start, len); 196a061fc8dSChris Mason if (em) { 197a061fc8dSChris Mason em->bdev = 198a061fc8dSChris Mason BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 199890871beSChris Mason read_unlock(&em_tree->lock); 2005f39d397SChris Mason goto out; 201a061fc8dSChris Mason } 202890871beSChris Mason read_unlock(&em_tree->lock); 2037b13b7b1SChris Mason 204172ddd60SDavid Sterba em = alloc_extent_map(); 2055f39d397SChris Mason if (!em) { 2065f39d397SChris Mason em = ERR_PTR(-ENOMEM); 2075f39d397SChris Mason goto out; 2085f39d397SChris Mason } 2095f39d397SChris Mason em->start = 0; 2100afbaf8cSChris Mason em->len = (u64)-1; 211c8b97818SChris Mason em->block_len = (u64)-1; 2125f39d397SChris Mason em->block_start = 0; 213a061fc8dSChris Mason em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 214d1310b2eSChris Mason 215890871beSChris Mason write_lock(&em_tree->lock); 2165f39d397SChris Mason ret = add_extent_mapping(em_tree, em); 2175f39d397SChris Mason if (ret == -EEXIST) { 2180afbaf8cSChris Mason u64 failed_start = em->start; 2190afbaf8cSChris Mason u64 failed_len = em->len; 2200afbaf8cSChris Mason 2215f39d397SChris Mason free_extent_map(em); 2227b13b7b1SChris Mason em = lookup_extent_mapping(em_tree, start, len); 2230afbaf8cSChris Mason if (em) { 2247b13b7b1SChris Mason ret = 0; 2250afbaf8cSChris Mason } else { 2260afbaf8cSChris Mason em = lookup_extent_mapping(em_tree, failed_start, 2270afbaf8cSChris Mason failed_len); 2287b13b7b1SChris Mason ret = -EIO; 2290afbaf8cSChris Mason } 2305f39d397SChris Mason } else if (ret) { 2317b13b7b1SChris Mason free_extent_map(em); 2327b13b7b1SChris Mason em = NULL; 2335f39d397SChris Mason } 234890871beSChris Mason write_unlock(&em_tree->lock); 2357b13b7b1SChris Mason 2367b13b7b1SChris Mason if (ret) 2377b13b7b1SChris Mason em = ERR_PTR(ret); 2385f39d397SChris Mason out: 2395f39d397SChris Mason return em; 2405f39d397SChris Mason } 2415f39d397SChris Mason 24219c00ddcSChris Mason u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len) 24319c00ddcSChris Mason { 244163e783eSDavid Woodhouse return crc32c(seed, data, len); 24519c00ddcSChris Mason } 24619c00ddcSChris Mason 24719c00ddcSChris Mason void btrfs_csum_final(u32 crc, char *result) 24819c00ddcSChris Mason { 2497e75bf3fSDavid Sterba put_unaligned_le32(~crc, result); 25019c00ddcSChris Mason } 25119c00ddcSChris Mason 252d352ac68SChris Mason /* 253d352ac68SChris Mason * compute the csum for a btree block, and either verify it or write it 254d352ac68SChris Mason * into the csum field of the block. 255d352ac68SChris Mason */ 25619c00ddcSChris Mason static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, 25719c00ddcSChris Mason int verify) 25819c00ddcSChris Mason { 2596c41761fSDavid Sterba u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy); 260607d432dSJosef Bacik char *result = NULL; 26119c00ddcSChris Mason unsigned long len; 26219c00ddcSChris Mason unsigned long cur_len; 26319c00ddcSChris Mason unsigned long offset = BTRFS_CSUM_SIZE; 26419c00ddcSChris Mason char *kaddr; 26519c00ddcSChris Mason unsigned long map_start; 26619c00ddcSChris Mason unsigned long map_len; 26719c00ddcSChris Mason int err; 26819c00ddcSChris Mason u32 crc = ~(u32)0; 269607d432dSJosef Bacik unsigned long inline_result; 27019c00ddcSChris Mason 27119c00ddcSChris Mason len = buf->len - offset; 27219c00ddcSChris Mason while (len > 0) { 27319c00ddcSChris Mason err = map_private_extent_buffer(buf, offset, 32, 274a6591715SChris Mason &kaddr, &map_start, &map_len); 275d397712bSChris Mason if (err) 27619c00ddcSChris Mason return 1; 27719c00ddcSChris Mason cur_len = min(len, map_len - (offset - map_start)); 27819c00ddcSChris Mason crc = btrfs_csum_data(root, kaddr + offset - map_start, 27919c00ddcSChris Mason crc, cur_len); 28019c00ddcSChris Mason len -= cur_len; 28119c00ddcSChris Mason offset += cur_len; 28219c00ddcSChris Mason } 283607d432dSJosef Bacik if (csum_size > sizeof(inline_result)) { 284607d432dSJosef Bacik result = kzalloc(csum_size * sizeof(char), GFP_NOFS); 285607d432dSJosef Bacik if (!result) 286607d432dSJosef Bacik return 1; 287607d432dSJosef Bacik } else { 288607d432dSJosef Bacik result = (char *)&inline_result; 289607d432dSJosef Bacik } 290607d432dSJosef Bacik 29119c00ddcSChris Mason btrfs_csum_final(crc, result); 29219c00ddcSChris Mason 29319c00ddcSChris Mason if (verify) { 294607d432dSJosef Bacik if (memcmp_extent_buffer(buf, result, 0, csum_size)) { 295e4204dedSChris Mason u32 val; 296e4204dedSChris Mason u32 found = 0; 297607d432dSJosef Bacik memcpy(&found, result, csum_size); 298e4204dedSChris Mason 299607d432dSJosef Bacik read_extent_buffer(buf, &val, 0, csum_size); 3007a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs: %s checksum verify " 301193f284dSChris Mason "failed on %llu wanted %X found %X " 302193f284dSChris Mason "level %d\n", 30319c00ddcSChris Mason root->fs_info->sb->s_id, 304193f284dSChris Mason (unsigned long long)buf->start, val, found, 305193f284dSChris Mason btrfs_header_level(buf)); 306607d432dSJosef Bacik if (result != (char *)&inline_result) 307607d432dSJosef Bacik kfree(result); 30819c00ddcSChris Mason return 1; 30919c00ddcSChris Mason } 31019c00ddcSChris Mason } else { 311607d432dSJosef Bacik write_extent_buffer(buf, result, 0, csum_size); 31219c00ddcSChris Mason } 313607d432dSJosef Bacik if (result != (char *)&inline_result) 314607d432dSJosef Bacik kfree(result); 31519c00ddcSChris Mason return 0; 31619c00ddcSChris Mason } 31719c00ddcSChris Mason 318d352ac68SChris Mason /* 319d352ac68SChris Mason * we can't consider a given block up to date unless the transid of the 320d352ac68SChris Mason * block matches the transid in the parent node's pointer. This is how we 321d352ac68SChris Mason * detect blocks that either didn't get written at all or got written 322d352ac68SChris Mason * in the wrong place. 323d352ac68SChris Mason */ 3241259ab75SChris Mason static int verify_parent_transid(struct extent_io_tree *io_tree, 3251259ab75SChris Mason struct extent_buffer *eb, u64 parent_transid) 3261259ab75SChris Mason { 3272ac55d41SJosef Bacik struct extent_state *cached_state = NULL; 3281259ab75SChris Mason int ret; 3291259ab75SChris Mason 3301259ab75SChris Mason if (!parent_transid || btrfs_header_generation(eb) == parent_transid) 3311259ab75SChris Mason return 0; 3321259ab75SChris Mason 3332ac55d41SJosef Bacik lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, 334d0082371SJeff Mahoney 0, &cached_state); 3352ac55d41SJosef Bacik if (extent_buffer_uptodate(io_tree, eb, cached_state) && 3361259ab75SChris Mason btrfs_header_generation(eb) == parent_transid) { 3371259ab75SChris Mason ret = 0; 3381259ab75SChris Mason goto out; 3391259ab75SChris Mason } 3407a36ddecSDavid Sterba printk_ratelimited("parent transid verify failed on %llu wanted %llu " 341193f284dSChris Mason "found %llu\n", 3421259ab75SChris Mason (unsigned long long)eb->start, 3431259ab75SChris Mason (unsigned long long)parent_transid, 3441259ab75SChris Mason (unsigned long long)btrfs_header_generation(eb)); 3451259ab75SChris Mason ret = 1; 3462ac55d41SJosef Bacik clear_extent_buffer_uptodate(io_tree, eb, &cached_state); 34733958dc6SChris Mason out: 3482ac55d41SJosef Bacik unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, 3492ac55d41SJosef Bacik &cached_state, GFP_NOFS); 3501259ab75SChris Mason return ret; 3511259ab75SChris Mason } 3521259ab75SChris Mason 353d352ac68SChris Mason /* 354d352ac68SChris Mason * helper to read a given tree block, doing retries as required when 355d352ac68SChris Mason * the checksums don't match and we have alternate mirrors to try. 356d352ac68SChris Mason */ 357f188591eSChris Mason static int btree_read_extent_buffer_pages(struct btrfs_root *root, 358f188591eSChris Mason struct extent_buffer *eb, 359ca7a79adSChris Mason u64 start, u64 parent_transid) 360f188591eSChris Mason { 361f188591eSChris Mason struct extent_io_tree *io_tree; 362f188591eSChris Mason int ret; 363f188591eSChris Mason int num_copies = 0; 364f188591eSChris Mason int mirror_num = 0; 365f188591eSChris Mason 366a826d6dcSJosef Bacik clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 367f188591eSChris Mason io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; 368f188591eSChris Mason while (1) { 369bb82ab88SArne Jansen ret = read_extent_buffer_pages(io_tree, eb, start, 370bb82ab88SArne Jansen WAIT_COMPLETE, 371f188591eSChris Mason btree_get_extent, mirror_num); 3721259ab75SChris Mason if (!ret && 3731259ab75SChris Mason !verify_parent_transid(io_tree, eb, parent_transid)) 374f188591eSChris Mason return ret; 375d397712bSChris Mason 376a826d6dcSJosef Bacik /* 377a826d6dcSJosef Bacik * This buffer's crc is fine, but its contents are corrupted, so 378a826d6dcSJosef Bacik * there is no reason to read the other copies, they won't be 379a826d6dcSJosef Bacik * any less wrong. 380a826d6dcSJosef Bacik */ 381a826d6dcSJosef Bacik if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) 382a826d6dcSJosef Bacik return ret; 383a826d6dcSJosef Bacik 384f188591eSChris Mason num_copies = btrfs_num_copies(&root->fs_info->mapping_tree, 385f188591eSChris Mason eb->start, eb->len); 3864235298eSChris Mason if (num_copies == 1) 387f188591eSChris Mason return ret; 3884235298eSChris Mason 389f188591eSChris Mason mirror_num++; 3904235298eSChris Mason if (mirror_num > num_copies) 391f188591eSChris Mason return ret; 392f188591eSChris Mason } 393f188591eSChris Mason return -EIO; 394f188591eSChris Mason } 39519c00ddcSChris Mason 396d352ac68SChris Mason /* 397d397712bSChris Mason * checksum a dirty tree block before IO. This has extra checks to make sure 398d397712bSChris Mason * we only fill in the checksum field in the first page of a multi-page block 399d352ac68SChris Mason */ 400d397712bSChris Mason 401b2950863SChristoph Hellwig static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) 40219c00ddcSChris Mason { 403d1310b2eSChris Mason struct extent_io_tree *tree; 40435ebb934SChris Mason u64 start = (u64)page->index << PAGE_CACHE_SHIFT; 40519c00ddcSChris Mason u64 found_start; 40619c00ddcSChris Mason unsigned long len; 40719c00ddcSChris Mason struct extent_buffer *eb; 408f188591eSChris Mason int ret; 409f188591eSChris Mason 410d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 41119c00ddcSChris Mason 412eb14ab8eSChris Mason if (page->private == EXTENT_PAGE_PRIVATE) { 413eb14ab8eSChris Mason WARN_ON(1); 41419c00ddcSChris Mason goto out; 415eb14ab8eSChris Mason } 416eb14ab8eSChris Mason if (!page->private) { 417eb14ab8eSChris Mason WARN_ON(1); 41819c00ddcSChris Mason goto out; 419eb14ab8eSChris Mason } 42019c00ddcSChris Mason len = page->private >> 2; 421d397712bSChris Mason WARN_ON(len == 0); 422d397712bSChris Mason 423ba144192SDavid Sterba eb = alloc_extent_buffer(tree, start, len, page); 42491ca338dSTsutomu Itoh if (eb == NULL) { 42591ca338dSTsutomu Itoh WARN_ON(1); 42691ca338dSTsutomu Itoh goto out; 42791ca338dSTsutomu Itoh } 428ca7a79adSChris Mason ret = btree_read_extent_buffer_pages(root, eb, start + PAGE_CACHE_SIZE, 429ca7a79adSChris Mason btrfs_header_generation(eb)); 430f188591eSChris Mason BUG_ON(ret); 431784b4e29SChris Mason WARN_ON(!btrfs_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN)); 432784b4e29SChris Mason 43319c00ddcSChris Mason found_start = btrfs_header_bytenr(eb); 43419c00ddcSChris Mason if (found_start != start) { 43555c69072SChris Mason WARN_ON(1); 43655c69072SChris Mason goto err; 43755c69072SChris Mason } 43855c69072SChris Mason if (eb->first_page != page) { 43955c69072SChris Mason WARN_ON(1); 44055c69072SChris Mason goto err; 44155c69072SChris Mason } 44255c69072SChris Mason if (!PageUptodate(page)) { 44355c69072SChris Mason WARN_ON(1); 44455c69072SChris Mason goto err; 44519c00ddcSChris Mason } 44619c00ddcSChris Mason csum_tree_block(root, eb, 0); 44755c69072SChris Mason err: 44819c00ddcSChris Mason free_extent_buffer(eb); 44919c00ddcSChris Mason out: 45019c00ddcSChris Mason return 0; 45119c00ddcSChris Mason } 45219c00ddcSChris Mason 4532b82032cSYan Zheng static int check_tree_block_fsid(struct btrfs_root *root, 4542b82032cSYan Zheng struct extent_buffer *eb) 4552b82032cSYan Zheng { 4562b82032cSYan Zheng struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; 4572b82032cSYan Zheng u8 fsid[BTRFS_UUID_SIZE]; 4582b82032cSYan Zheng int ret = 1; 4592b82032cSYan Zheng 4602b82032cSYan Zheng read_extent_buffer(eb, fsid, (unsigned long)btrfs_header_fsid(eb), 4612b82032cSYan Zheng BTRFS_FSID_SIZE); 4622b82032cSYan Zheng while (fs_devices) { 4632b82032cSYan Zheng if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { 4642b82032cSYan Zheng ret = 0; 4652b82032cSYan Zheng break; 4662b82032cSYan Zheng } 4672b82032cSYan Zheng fs_devices = fs_devices->seed; 4682b82032cSYan Zheng } 4692b82032cSYan Zheng return ret; 4702b82032cSYan Zheng } 4712b82032cSYan Zheng 472a826d6dcSJosef Bacik #define CORRUPT(reason, eb, root, slot) \ 473a826d6dcSJosef Bacik printk(KERN_CRIT "btrfs: corrupt leaf, %s: block=%llu," \ 474a826d6dcSJosef Bacik "root=%llu, slot=%d\n", reason, \ 475a826d6dcSJosef Bacik (unsigned long long)btrfs_header_bytenr(eb), \ 476a826d6dcSJosef Bacik (unsigned long long)root->objectid, slot) 477a826d6dcSJosef Bacik 478a826d6dcSJosef Bacik static noinline int check_leaf(struct btrfs_root *root, 479a826d6dcSJosef Bacik struct extent_buffer *leaf) 480a826d6dcSJosef Bacik { 481a826d6dcSJosef Bacik struct btrfs_key key; 482a826d6dcSJosef Bacik struct btrfs_key leaf_key; 483a826d6dcSJosef Bacik u32 nritems = btrfs_header_nritems(leaf); 484a826d6dcSJosef Bacik int slot; 485a826d6dcSJosef Bacik 486a826d6dcSJosef Bacik if (nritems == 0) 487a826d6dcSJosef Bacik return 0; 488a826d6dcSJosef Bacik 489a826d6dcSJosef Bacik /* Check the 0 item */ 490a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != 491a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 492a826d6dcSJosef Bacik CORRUPT("invalid item offset size pair", leaf, root, 0); 493a826d6dcSJosef Bacik return -EIO; 494a826d6dcSJosef Bacik } 495a826d6dcSJosef Bacik 496a826d6dcSJosef Bacik /* 497a826d6dcSJosef Bacik * Check to make sure each items keys are in the correct order and their 498a826d6dcSJosef Bacik * offsets make sense. We only have to loop through nritems-1 because 499a826d6dcSJosef Bacik * we check the current slot against the next slot, which verifies the 500a826d6dcSJosef Bacik * next slot's offset+size makes sense and that the current's slot 501a826d6dcSJosef Bacik * offset is correct. 502a826d6dcSJosef Bacik */ 503a826d6dcSJosef Bacik for (slot = 0; slot < nritems - 1; slot++) { 504a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &leaf_key, slot); 505a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &key, slot + 1); 506a826d6dcSJosef Bacik 507a826d6dcSJosef Bacik /* Make sure the keys are in the right order */ 508a826d6dcSJosef Bacik if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { 509a826d6dcSJosef Bacik CORRUPT("bad key order", leaf, root, slot); 510a826d6dcSJosef Bacik return -EIO; 511a826d6dcSJosef Bacik } 512a826d6dcSJosef Bacik 513a826d6dcSJosef Bacik /* 514a826d6dcSJosef Bacik * Make sure the offset and ends are right, remember that the 515a826d6dcSJosef Bacik * item data starts at the end of the leaf and grows towards the 516a826d6dcSJosef Bacik * front. 517a826d6dcSJosef Bacik */ 518a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, slot) != 519a826d6dcSJosef Bacik btrfs_item_end_nr(leaf, slot + 1)) { 520a826d6dcSJosef Bacik CORRUPT("slot offset bad", leaf, root, slot); 521a826d6dcSJosef Bacik return -EIO; 522a826d6dcSJosef Bacik } 523a826d6dcSJosef Bacik 524a826d6dcSJosef Bacik /* 525a826d6dcSJosef Bacik * Check to make sure that we don't point outside of the leaf, 526a826d6dcSJosef Bacik * just incase all the items are consistent to eachother, but 527a826d6dcSJosef Bacik * all point outside of the leaf. 528a826d6dcSJosef Bacik */ 529a826d6dcSJosef Bacik if (btrfs_item_end_nr(leaf, slot) > 530a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 531a826d6dcSJosef Bacik CORRUPT("slot end outside of leaf", leaf, root, slot); 532a826d6dcSJosef Bacik return -EIO; 533a826d6dcSJosef Bacik } 534a826d6dcSJosef Bacik } 535a826d6dcSJosef Bacik 536a826d6dcSJosef Bacik return 0; 537a826d6dcSJosef Bacik } 538a826d6dcSJosef Bacik 539b2950863SChristoph Hellwig static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end, 540ce9adaa5SChris Mason struct extent_state *state) 541ce9adaa5SChris Mason { 542ce9adaa5SChris Mason struct extent_io_tree *tree; 543ce9adaa5SChris Mason u64 found_start; 544ce9adaa5SChris Mason int found_level; 545ce9adaa5SChris Mason unsigned long len; 546ce9adaa5SChris Mason struct extent_buffer *eb; 547ce9adaa5SChris Mason struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 548f188591eSChris Mason int ret = 0; 549ce9adaa5SChris Mason 550ce9adaa5SChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 551ce9adaa5SChris Mason if (page->private == EXTENT_PAGE_PRIVATE) 552ce9adaa5SChris Mason goto out; 553ce9adaa5SChris Mason if (!page->private) 554ce9adaa5SChris Mason goto out; 555d397712bSChris Mason 556ce9adaa5SChris Mason len = page->private >> 2; 557d397712bSChris Mason WARN_ON(len == 0); 558d397712bSChris Mason 559ba144192SDavid Sterba eb = alloc_extent_buffer(tree, start, len, page); 56091ca338dSTsutomu Itoh if (eb == NULL) { 56191ca338dSTsutomu Itoh ret = -EIO; 56291ca338dSTsutomu Itoh goto out; 56391ca338dSTsutomu Itoh } 564f188591eSChris Mason 565ce9adaa5SChris Mason found_start = btrfs_header_bytenr(eb); 56623a07867SChris Mason if (found_start != start) { 5677a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs bad tree block start " 568193f284dSChris Mason "%llu %llu\n", 569a1b32a59SChris Mason (unsigned long long)found_start, 570a1b32a59SChris Mason (unsigned long long)eb->start); 571f188591eSChris Mason ret = -EIO; 572ce9adaa5SChris Mason goto err; 573ce9adaa5SChris Mason } 574ce9adaa5SChris Mason if (eb->first_page != page) { 575d397712bSChris Mason printk(KERN_INFO "btrfs bad first page %lu %lu\n", 576d397712bSChris Mason eb->first_page->index, page->index); 577ce9adaa5SChris Mason WARN_ON(1); 578f188591eSChris Mason ret = -EIO; 579ce9adaa5SChris Mason goto err; 580ce9adaa5SChris Mason } 5812b82032cSYan Zheng if (check_tree_block_fsid(root, eb)) { 5827a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs bad fsid on block %llu\n", 583d397712bSChris Mason (unsigned long long)eb->start); 5841259ab75SChris Mason ret = -EIO; 5851259ab75SChris Mason goto err; 5861259ab75SChris Mason } 587ce9adaa5SChris Mason found_level = btrfs_header_level(eb); 588ce9adaa5SChris Mason 58985d4e461SChris Mason btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), 59085d4e461SChris Mason eb, found_level); 5914008c04aSChris Mason 592ce9adaa5SChris Mason ret = csum_tree_block(root, eb, 1); 593a826d6dcSJosef Bacik if (ret) { 594f188591eSChris Mason ret = -EIO; 595a826d6dcSJosef Bacik goto err; 596a826d6dcSJosef Bacik } 597a826d6dcSJosef Bacik 598a826d6dcSJosef Bacik /* 599a826d6dcSJosef Bacik * If this is a leaf block and it is corrupt, set the corrupt bit so 600a826d6dcSJosef Bacik * that we don't try and read the other copies of this block, just 601a826d6dcSJosef Bacik * return -EIO. 602a826d6dcSJosef Bacik */ 603a826d6dcSJosef Bacik if (found_level == 0 && check_leaf(root, eb)) { 604a826d6dcSJosef Bacik set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 605a826d6dcSJosef Bacik ret = -EIO; 606a826d6dcSJosef Bacik } 607ce9adaa5SChris Mason 608ce9adaa5SChris Mason end = min_t(u64, eb->len, PAGE_CACHE_SIZE); 609ce9adaa5SChris Mason end = eb->start + end - 1; 610ce9adaa5SChris Mason err: 6114bb31e92SArne Jansen if (test_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) { 6124bb31e92SArne Jansen clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags); 6134bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, ret); 6144bb31e92SArne Jansen } 6154bb31e92SArne Jansen 616ce9adaa5SChris Mason free_extent_buffer(eb); 617ce9adaa5SChris Mason out: 618f188591eSChris Mason return ret; 619ce9adaa5SChris Mason } 620ce9adaa5SChris Mason 6214bb31e92SArne Jansen static int btree_io_failed_hook(struct bio *failed_bio, 6224bb31e92SArne Jansen struct page *page, u64 start, u64 end, 62332240a91SJan Schmidt int mirror_num, struct extent_state *state) 6244bb31e92SArne Jansen { 6254bb31e92SArne Jansen struct extent_io_tree *tree; 6264bb31e92SArne Jansen unsigned long len; 6274bb31e92SArne Jansen struct extent_buffer *eb; 6284bb31e92SArne Jansen struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 6294bb31e92SArne Jansen 6304bb31e92SArne Jansen tree = &BTRFS_I(page->mapping->host)->io_tree; 6314bb31e92SArne Jansen if (page->private == EXTENT_PAGE_PRIVATE) 6324bb31e92SArne Jansen goto out; 6334bb31e92SArne Jansen if (!page->private) 6344bb31e92SArne Jansen goto out; 6354bb31e92SArne Jansen 6364bb31e92SArne Jansen len = page->private >> 2; 6374bb31e92SArne Jansen WARN_ON(len == 0); 6384bb31e92SArne Jansen 6394bb31e92SArne Jansen eb = alloc_extent_buffer(tree, start, len, page); 6404bb31e92SArne Jansen if (eb == NULL) 6414bb31e92SArne Jansen goto out; 6424bb31e92SArne Jansen 6434bb31e92SArne Jansen if (test_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) { 6444bb31e92SArne Jansen clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags); 6454bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, -EIO); 6464bb31e92SArne Jansen } 647c674e04eSChris Mason free_extent_buffer(eb); 6484bb31e92SArne Jansen 6494bb31e92SArne Jansen out: 6504bb31e92SArne Jansen return -EIO; /* we fixed nothing */ 6514bb31e92SArne Jansen } 6524bb31e92SArne Jansen 653ce9adaa5SChris Mason static void end_workqueue_bio(struct bio *bio, int err) 654ce9adaa5SChris Mason { 655ce9adaa5SChris Mason struct end_io_wq *end_io_wq = bio->bi_private; 656ce9adaa5SChris Mason struct btrfs_fs_info *fs_info; 657ce9adaa5SChris Mason 658ce9adaa5SChris Mason fs_info = end_io_wq->info; 659ce9adaa5SChris Mason end_io_wq->error = err; 6608b712842SChris Mason end_io_wq->work.func = end_workqueue_fn; 6618b712842SChris Mason end_io_wq->work.flags = 0; 662d20f7043SChris Mason 6637b6d91daSChristoph Hellwig if (bio->bi_rw & REQ_WRITE) { 6640cb59c99SJosef Bacik if (end_io_wq->metadata == 1) 665cad321adSChris Mason btrfs_queue_worker(&fs_info->endio_meta_write_workers, 666cad321adSChris Mason &end_io_wq->work); 6670cb59c99SJosef Bacik else if (end_io_wq->metadata == 2) 6680cb59c99SJosef Bacik btrfs_queue_worker(&fs_info->endio_freespace_worker, 6690cb59c99SJosef Bacik &end_io_wq->work); 670cad321adSChris Mason else 671e6dcd2dcSChris Mason btrfs_queue_worker(&fs_info->endio_write_workers, 672e6dcd2dcSChris Mason &end_io_wq->work); 673d20f7043SChris Mason } else { 674d20f7043SChris Mason if (end_io_wq->metadata) 675d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_meta_workers, 676d20f7043SChris Mason &end_io_wq->work); 677e6dcd2dcSChris Mason else 678d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_workers, 679d20f7043SChris Mason &end_io_wq->work); 680d20f7043SChris Mason } 681ce9adaa5SChris Mason } 682ce9adaa5SChris Mason 6830cb59c99SJosef Bacik /* 6840cb59c99SJosef Bacik * For the metadata arg you want 6850cb59c99SJosef Bacik * 6860cb59c99SJosef Bacik * 0 - if data 6870cb59c99SJosef Bacik * 1 - if normal metadta 6880cb59c99SJosef Bacik * 2 - if writing to the free space cache area 6890cb59c99SJosef Bacik */ 69022c59948SChris Mason int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, 69122c59948SChris Mason int metadata) 6920b86a832SChris Mason { 693ce9adaa5SChris Mason struct end_io_wq *end_io_wq; 694ce9adaa5SChris Mason end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); 695ce9adaa5SChris Mason if (!end_io_wq) 696ce9adaa5SChris Mason return -ENOMEM; 697ce9adaa5SChris Mason 698ce9adaa5SChris Mason end_io_wq->private = bio->bi_private; 699ce9adaa5SChris Mason end_io_wq->end_io = bio->bi_end_io; 70022c59948SChris Mason end_io_wq->info = info; 701ce9adaa5SChris Mason end_io_wq->error = 0; 702ce9adaa5SChris Mason end_io_wq->bio = bio; 70322c59948SChris Mason end_io_wq->metadata = metadata; 704ce9adaa5SChris Mason 705ce9adaa5SChris Mason bio->bi_private = end_io_wq; 706ce9adaa5SChris Mason bio->bi_end_io = end_workqueue_bio; 70722c59948SChris Mason return 0; 70822c59948SChris Mason } 70922c59948SChris Mason 710b64a2851SChris Mason unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) 7114854ddd0SChris Mason { 7124854ddd0SChris Mason unsigned long limit = min_t(unsigned long, 7134854ddd0SChris Mason info->workers.max_workers, 7144854ddd0SChris Mason info->fs_devices->open_devices); 7154854ddd0SChris Mason return 256 * limit; 7164854ddd0SChris Mason } 7174854ddd0SChris Mason 7184a69a410SChris Mason static void run_one_async_start(struct btrfs_work *work) 7194a69a410SChris Mason { 7204a69a410SChris Mason struct async_submit_bio *async; 7214a69a410SChris Mason 7224a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 7234a69a410SChris Mason async->submit_bio_start(async->inode, async->rw, async->bio, 724eaf25d93SChris Mason async->mirror_num, async->bio_flags, 725eaf25d93SChris Mason async->bio_offset); 7264a69a410SChris Mason } 7274a69a410SChris Mason 7284a69a410SChris Mason static void run_one_async_done(struct btrfs_work *work) 7298b712842SChris Mason { 7308b712842SChris Mason struct btrfs_fs_info *fs_info; 7318b712842SChris Mason struct async_submit_bio *async; 7324854ddd0SChris Mason int limit; 7338b712842SChris Mason 7348b712842SChris Mason async = container_of(work, struct async_submit_bio, work); 7358b712842SChris Mason fs_info = BTRFS_I(async->inode)->root->fs_info; 7364854ddd0SChris Mason 737b64a2851SChris Mason limit = btrfs_async_submit_limit(fs_info); 7384854ddd0SChris Mason limit = limit * 2 / 3; 7394854ddd0SChris Mason 7408b712842SChris Mason atomic_dec(&fs_info->nr_async_submits); 7410986fe9eSChris Mason 742b64a2851SChris Mason if (atomic_read(&fs_info->nr_async_submits) < limit && 743b64a2851SChris Mason waitqueue_active(&fs_info->async_submit_wait)) 7444854ddd0SChris Mason wake_up(&fs_info->async_submit_wait); 7454854ddd0SChris Mason 7464a69a410SChris Mason async->submit_bio_done(async->inode, async->rw, async->bio, 747eaf25d93SChris Mason async->mirror_num, async->bio_flags, 748eaf25d93SChris Mason async->bio_offset); 7494a69a410SChris Mason } 7504a69a410SChris Mason 7514a69a410SChris Mason static void run_one_async_free(struct btrfs_work *work) 7524a69a410SChris Mason { 7534a69a410SChris Mason struct async_submit_bio *async; 7544a69a410SChris Mason 7554a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 7568b712842SChris Mason kfree(async); 7578b712842SChris Mason } 7588b712842SChris Mason 75944b8bd7eSChris Mason int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, 76044b8bd7eSChris Mason int rw, struct bio *bio, int mirror_num, 761c8b97818SChris Mason unsigned long bio_flags, 762eaf25d93SChris Mason u64 bio_offset, 7634a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start, 7644a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done) 76544b8bd7eSChris Mason { 76644b8bd7eSChris Mason struct async_submit_bio *async; 76744b8bd7eSChris Mason 76844b8bd7eSChris Mason async = kmalloc(sizeof(*async), GFP_NOFS); 76944b8bd7eSChris Mason if (!async) 77044b8bd7eSChris Mason return -ENOMEM; 77144b8bd7eSChris Mason 77244b8bd7eSChris Mason async->inode = inode; 77344b8bd7eSChris Mason async->rw = rw; 77444b8bd7eSChris Mason async->bio = bio; 77544b8bd7eSChris Mason async->mirror_num = mirror_num; 7764a69a410SChris Mason async->submit_bio_start = submit_bio_start; 7774a69a410SChris Mason async->submit_bio_done = submit_bio_done; 7784a69a410SChris Mason 7794a69a410SChris Mason async->work.func = run_one_async_start; 7804a69a410SChris Mason async->work.ordered_func = run_one_async_done; 7814a69a410SChris Mason async->work.ordered_free = run_one_async_free; 7824a69a410SChris Mason 7838b712842SChris Mason async->work.flags = 0; 784c8b97818SChris Mason async->bio_flags = bio_flags; 785eaf25d93SChris Mason async->bio_offset = bio_offset; 7868c8bee1dSChris Mason 787cb03c743SChris Mason atomic_inc(&fs_info->nr_async_submits); 788d313d7a3SChris Mason 7897b6d91daSChristoph Hellwig if (rw & REQ_SYNC) 790d313d7a3SChris Mason btrfs_set_work_high_prio(&async->work); 791d313d7a3SChris Mason 7928b712842SChris Mason btrfs_queue_worker(&fs_info->workers, &async->work); 7939473f16cSChris Mason 794771ed689SChris Mason while (atomic_read(&fs_info->async_submit_draining) && 795771ed689SChris Mason atomic_read(&fs_info->nr_async_submits)) { 796771ed689SChris Mason wait_event(fs_info->async_submit_wait, 797771ed689SChris Mason (atomic_read(&fs_info->nr_async_submits) == 0)); 798771ed689SChris Mason } 799771ed689SChris Mason 80044b8bd7eSChris Mason return 0; 80144b8bd7eSChris Mason } 80244b8bd7eSChris Mason 803ce3ed71aSChris Mason static int btree_csum_one_bio(struct bio *bio) 804ce3ed71aSChris Mason { 805ce3ed71aSChris Mason struct bio_vec *bvec = bio->bi_io_vec; 806ce3ed71aSChris Mason int bio_index = 0; 807ce3ed71aSChris Mason struct btrfs_root *root; 808ce3ed71aSChris Mason 809ce3ed71aSChris Mason WARN_ON(bio->bi_vcnt <= 0); 810ce3ed71aSChris Mason while (bio_index < bio->bi_vcnt) { 811ce3ed71aSChris Mason root = BTRFS_I(bvec->bv_page->mapping->host)->root; 812ce3ed71aSChris Mason csum_dirty_buffer(root, bvec->bv_page); 813ce3ed71aSChris Mason bio_index++; 814ce3ed71aSChris Mason bvec++; 815ce3ed71aSChris Mason } 816ce3ed71aSChris Mason return 0; 817ce3ed71aSChris Mason } 818ce3ed71aSChris Mason 8194a69a410SChris Mason static int __btree_submit_bio_start(struct inode *inode, int rw, 8204a69a410SChris Mason struct bio *bio, int mirror_num, 821eaf25d93SChris Mason unsigned long bio_flags, 822eaf25d93SChris Mason u64 bio_offset) 82322c59948SChris Mason { 8248b712842SChris Mason /* 8258b712842SChris Mason * when we're called for a write, we're already in the async 8265443be45SChris Mason * submission context. Just jump into btrfs_map_bio 8278b712842SChris Mason */ 828ce3ed71aSChris Mason btree_csum_one_bio(bio); 8294a69a410SChris Mason return 0; 83022c59948SChris Mason } 83122c59948SChris Mason 8324a69a410SChris Mason static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, 833eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 834eaf25d93SChris Mason u64 bio_offset) 8354a69a410SChris Mason { 8368b712842SChris Mason /* 8374a69a410SChris Mason * when we're called for a write, we're already in the async 8384a69a410SChris Mason * submission context. Just jump into btrfs_map_bio 8398b712842SChris Mason */ 8408b712842SChris Mason return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); 8410b86a832SChris Mason } 8420b86a832SChris Mason 84344b8bd7eSChris Mason static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, 844eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 845eaf25d93SChris Mason u64 bio_offset) 84644b8bd7eSChris Mason { 8474a69a410SChris Mason int ret; 848cad321adSChris Mason 849355808c2SJeff Mahoney ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, bio, 1); 850355808c2SJeff Mahoney if (ret) 851355808c2SJeff Mahoney return ret; 8524a69a410SChris Mason 8537b6d91daSChristoph Hellwig if (!(rw & REQ_WRITE)) { 854cad321adSChris Mason /* 855cad321adSChris Mason * called for a read, do the setup so that checksum validation 856cad321adSChris Mason * can happen in the async kernel threads 857cad321adSChris Mason */ 8584a69a410SChris Mason return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 8596f3577bdSChris Mason mirror_num, 0); 86044b8bd7eSChris Mason } 861d313d7a3SChris Mason 862cad321adSChris Mason /* 863cad321adSChris Mason * kthread helpers are used to submit writes so that checksumming 864cad321adSChris Mason * can happen in parallel across all CPUs 865cad321adSChris Mason */ 86644b8bd7eSChris Mason return btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, 867c8b97818SChris Mason inode, rw, bio, mirror_num, 0, 868eaf25d93SChris Mason bio_offset, 8694a69a410SChris Mason __btree_submit_bio_start, 8704a69a410SChris Mason __btree_submit_bio_done); 87144b8bd7eSChris Mason } 87244b8bd7eSChris Mason 8733dd1462eSJan Beulich #ifdef CONFIG_MIGRATION 874784b4e29SChris Mason static int btree_migratepage(struct address_space *mapping, 875a6bc32b8SMel Gorman struct page *newpage, struct page *page, 876a6bc32b8SMel Gorman enum migrate_mode mode) 877784b4e29SChris Mason { 878784b4e29SChris Mason /* 879784b4e29SChris Mason * we can't safely write a btree page from here, 880784b4e29SChris Mason * we haven't done the locking hook 881784b4e29SChris Mason */ 882784b4e29SChris Mason if (PageDirty(page)) 883784b4e29SChris Mason return -EAGAIN; 884784b4e29SChris Mason /* 885784b4e29SChris Mason * Buffers may be managed in a filesystem specific way. 886784b4e29SChris Mason * We must have no buffers or drop them. 887784b4e29SChris Mason */ 888784b4e29SChris Mason if (page_has_private(page) && 889784b4e29SChris Mason !try_to_release_page(page, GFP_KERNEL)) 890784b4e29SChris Mason return -EAGAIN; 891a6bc32b8SMel Gorman return migrate_page(mapping, newpage, page, mode); 892784b4e29SChris Mason } 8933dd1462eSJan Beulich #endif 894784b4e29SChris Mason 8955f39d397SChris Mason static int btree_writepage(struct page *page, struct writeback_control *wbc) 8965f39d397SChris Mason { 897d1310b2eSChris Mason struct extent_io_tree *tree; 898b9473439SChris Mason struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 899b9473439SChris Mason struct extent_buffer *eb; 900b9473439SChris Mason int was_dirty; 9015443be45SChris Mason 902b9473439SChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 903b9473439SChris Mason if (!(current->flags & PF_MEMALLOC)) { 904b9473439SChris Mason return extent_write_full_page(tree, page, 905b9473439SChris Mason btree_get_extent, wbc); 906b9473439SChris Mason } 907b9473439SChris Mason 9085443be45SChris Mason redirty_page_for_writepage(wbc, page); 909784b4e29SChris Mason eb = btrfs_find_tree_block(root, page_offset(page), PAGE_CACHE_SIZE); 910b9473439SChris Mason WARN_ON(!eb); 911b9473439SChris Mason 912b9473439SChris Mason was_dirty = test_and_set_bit(EXTENT_BUFFER_DIRTY, &eb->bflags); 913b9473439SChris Mason if (!was_dirty) { 914b9473439SChris Mason spin_lock(&root->fs_info->delalloc_lock); 915b9473439SChris Mason root->fs_info->dirty_metadata_bytes += PAGE_CACHE_SIZE; 916b9473439SChris Mason spin_unlock(&root->fs_info->delalloc_lock); 917b9473439SChris Mason } 918b9473439SChris Mason free_extent_buffer(eb); 919b9473439SChris Mason 9205443be45SChris Mason unlock_page(page); 9215443be45SChris Mason return 0; 9225443be45SChris Mason } 9230da5468fSChris Mason 9240da5468fSChris Mason static int btree_writepages(struct address_space *mapping, 9250da5468fSChris Mason struct writeback_control *wbc) 9260da5468fSChris Mason { 927d1310b2eSChris Mason struct extent_io_tree *tree; 928d1310b2eSChris Mason tree = &BTRFS_I(mapping->host)->io_tree; 929d8d5f3e1SChris Mason if (wbc->sync_mode == WB_SYNC_NONE) { 930b9473439SChris Mason struct btrfs_root *root = BTRFS_I(mapping->host)->root; 931793955bcSChris Mason u64 num_dirty; 93224ab9cd8SChris Mason unsigned long thresh = 32 * 1024 * 1024; 933448d640bSChris Mason 934448d640bSChris Mason if (wbc->for_kupdate) 935448d640bSChris Mason return 0; 936448d640bSChris Mason 937b9473439SChris Mason /* this is a bit racy, but that's ok */ 938b9473439SChris Mason num_dirty = root->fs_info->dirty_metadata_bytes; 939d397712bSChris Mason if (num_dirty < thresh) 940793955bcSChris Mason return 0; 941793955bcSChris Mason } 9420da5468fSChris Mason return extent_writepages(tree, mapping, btree_get_extent, wbc); 9430da5468fSChris Mason } 9440da5468fSChris Mason 945b2950863SChristoph Hellwig static int btree_readpage(struct file *file, struct page *page) 9465f39d397SChris Mason { 947d1310b2eSChris Mason struct extent_io_tree *tree; 948d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 9498ddc7d9cSJan Schmidt return extent_read_full_page(tree, page, btree_get_extent, 0); 9505f39d397SChris Mason } 9515f39d397SChris Mason 95270dec807SChris Mason static int btree_releasepage(struct page *page, gfp_t gfp_flags) 9535f39d397SChris Mason { 954d1310b2eSChris Mason struct extent_io_tree *tree; 955d1310b2eSChris Mason struct extent_map_tree *map; 9565f39d397SChris Mason int ret; 9575f39d397SChris Mason 95898509cfcSChris Mason if (PageWriteback(page) || PageDirty(page)) 95998509cfcSChris Mason return 0; 96098509cfcSChris Mason 961d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 962d1310b2eSChris Mason map = &BTRFS_I(page->mapping->host)->extent_tree; 9636af118ceSChris Mason 9640c4e538bSDavid Sterba /* 9650c4e538bSDavid Sterba * We need to mask out eg. __GFP_HIGHMEM and __GFP_DMA32 as we're doing 9660c4e538bSDavid Sterba * slab allocation from alloc_extent_state down the callchain where 9670c4e538bSDavid Sterba * it'd hit a BUG_ON as those flags are not allowed. 9680c4e538bSDavid Sterba */ 9690c4e538bSDavid Sterba gfp_flags &= ~GFP_SLAB_BUG_MASK; 9700c4e538bSDavid Sterba 9717b13b7b1SChris Mason ret = try_release_extent_state(map, tree, page, gfp_flags); 972d397712bSChris Mason if (!ret) 9736af118ceSChris Mason return 0; 9746af118ceSChris Mason 9756af118ceSChris Mason ret = try_release_extent_buffer(tree, page); 9765f39d397SChris Mason if (ret == 1) { 9775f39d397SChris Mason ClearPagePrivate(page); 9785f39d397SChris Mason set_page_private(page, 0); 979d98237b3SChris Mason page_cache_release(page); 9805f39d397SChris Mason } 9816af118ceSChris Mason 982d98237b3SChris Mason return ret; 983d98237b3SChris Mason } 984d98237b3SChris Mason 9855f39d397SChris Mason static void btree_invalidatepage(struct page *page, unsigned long offset) 986d98237b3SChris Mason { 987d1310b2eSChris Mason struct extent_io_tree *tree; 988d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 9895f39d397SChris Mason extent_invalidatepage(tree, page, offset); 9905f39d397SChris Mason btree_releasepage(page, GFP_NOFS); 9919ad6b7bcSChris Mason if (PagePrivate(page)) { 992d397712bSChris Mason printk(KERN_WARNING "btrfs warning page private not zero " 993d397712bSChris Mason "on page %llu\n", (unsigned long long)page_offset(page)); 9949ad6b7bcSChris Mason ClearPagePrivate(page); 9959ad6b7bcSChris Mason set_page_private(page, 0); 9969ad6b7bcSChris Mason page_cache_release(page); 9979ad6b7bcSChris Mason } 998d98237b3SChris Mason } 999d98237b3SChris Mason 10007f09410bSAlexey Dobriyan static const struct address_space_operations btree_aops = { 1001d98237b3SChris Mason .readpage = btree_readpage, 1002d98237b3SChris Mason .writepage = btree_writepage, 10030da5468fSChris Mason .writepages = btree_writepages, 10045f39d397SChris Mason .releasepage = btree_releasepage, 10055f39d397SChris Mason .invalidatepage = btree_invalidatepage, 10065a92bc88SChris Mason #ifdef CONFIG_MIGRATION 1007784b4e29SChris Mason .migratepage = btree_migratepage, 10085a92bc88SChris Mason #endif 1009d98237b3SChris Mason }; 1010123abc88SChris Mason 1011ca7a79adSChris Mason int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, 1012ca7a79adSChris Mason u64 parent_transid) 1013090d1875SChris Mason { 10145f39d397SChris Mason struct extent_buffer *buf = NULL; 10155f39d397SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 1016de428b63SChris Mason int ret = 0; 1017090d1875SChris Mason 1018db94535dSChris Mason buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 10195f39d397SChris Mason if (!buf) 1020090d1875SChris Mason return 0; 1021d1310b2eSChris Mason read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, 1022bb82ab88SArne Jansen buf, 0, WAIT_NONE, btree_get_extent, 0); 10235f39d397SChris Mason free_extent_buffer(buf); 1024de428b63SChris Mason return ret; 1025090d1875SChris Mason } 1026090d1875SChris Mason 1027ab0fff03SArne Jansen int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, 1028ab0fff03SArne Jansen int mirror_num, struct extent_buffer **eb) 1029ab0fff03SArne Jansen { 1030ab0fff03SArne Jansen struct extent_buffer *buf = NULL; 1031ab0fff03SArne Jansen struct inode *btree_inode = root->fs_info->btree_inode; 1032ab0fff03SArne Jansen struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; 1033ab0fff03SArne Jansen int ret; 1034ab0fff03SArne Jansen 1035ab0fff03SArne Jansen buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 1036ab0fff03SArne Jansen if (!buf) 1037ab0fff03SArne Jansen return 0; 1038ab0fff03SArne Jansen 1039ab0fff03SArne Jansen set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); 1040ab0fff03SArne Jansen 1041ab0fff03SArne Jansen ret = read_extent_buffer_pages(io_tree, buf, 0, WAIT_PAGE_LOCK, 1042ab0fff03SArne Jansen btree_get_extent, mirror_num); 1043ab0fff03SArne Jansen if (ret) { 1044ab0fff03SArne Jansen free_extent_buffer(buf); 1045ab0fff03SArne Jansen return ret; 1046ab0fff03SArne Jansen } 1047ab0fff03SArne Jansen 1048ab0fff03SArne Jansen if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { 1049ab0fff03SArne Jansen free_extent_buffer(buf); 1050ab0fff03SArne Jansen return -EIO; 1051ab0fff03SArne Jansen } else if (extent_buffer_uptodate(io_tree, buf, NULL)) { 1052ab0fff03SArne Jansen *eb = buf; 1053ab0fff03SArne Jansen } else { 1054ab0fff03SArne Jansen free_extent_buffer(buf); 1055ab0fff03SArne Jansen } 1056ab0fff03SArne Jansen return 0; 1057ab0fff03SArne Jansen } 1058ab0fff03SArne Jansen 10590999df54SChris Mason struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, 10600999df54SChris Mason u64 bytenr, u32 blocksize) 10610999df54SChris Mason { 10620999df54SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 10630999df54SChris Mason struct extent_buffer *eb; 10640999df54SChris Mason eb = find_extent_buffer(&BTRFS_I(btree_inode)->io_tree, 1065f09d1f60SDavid Sterba bytenr, blocksize); 10660999df54SChris Mason return eb; 10670999df54SChris Mason } 10680999df54SChris Mason 10690999df54SChris Mason struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, 10700999df54SChris Mason u64 bytenr, u32 blocksize) 10710999df54SChris Mason { 10720999df54SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 10730999df54SChris Mason struct extent_buffer *eb; 10740999df54SChris Mason 10750999df54SChris Mason eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree, 1076ba144192SDavid Sterba bytenr, blocksize, NULL); 10770999df54SChris Mason return eb; 10780999df54SChris Mason } 10790999df54SChris Mason 10800999df54SChris Mason 1081e02119d5SChris Mason int btrfs_write_tree_block(struct extent_buffer *buf) 1082e02119d5SChris Mason { 10838aa38c31SChristoph Hellwig return filemap_fdatawrite_range(buf->first_page->mapping, buf->start, 10848aa38c31SChristoph Hellwig buf->start + buf->len - 1); 1085e02119d5SChris Mason } 1086e02119d5SChris Mason 1087e02119d5SChris Mason int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) 1088e02119d5SChris Mason { 10898aa38c31SChristoph Hellwig return filemap_fdatawait_range(buf->first_page->mapping, 10908aa38c31SChristoph Hellwig buf->start, buf->start + buf->len - 1); 1091e02119d5SChris Mason } 1092e02119d5SChris Mason 1093db94535dSChris Mason struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, 1094ca7a79adSChris Mason u32 blocksize, u64 parent_transid) 1095e20d96d6SChris Mason { 10965f39d397SChris Mason struct extent_buffer *buf = NULL; 109719c00ddcSChris Mason int ret; 109819c00ddcSChris Mason 1099db94535dSChris Mason buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 11005f39d397SChris Mason if (!buf) 1101d98237b3SChris Mason return NULL; 1102e4204dedSChris Mason 1103ca7a79adSChris Mason ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 1104ce9adaa5SChris Mason 1105d397712bSChris Mason if (ret == 0) 1106b4ce94deSChris Mason set_bit(EXTENT_BUFFER_UPTODATE, &buf->bflags); 11075f39d397SChris Mason return buf; 1108ce9adaa5SChris Mason 1109eb60ceacSChris Mason } 1110eb60ceacSChris Mason 1111d5c13f92SJeff Mahoney void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, 11125f39d397SChris Mason struct extent_buffer *buf) 1113ed2ff2cbSChris Mason { 11145f39d397SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 111555c69072SChris Mason if (btrfs_header_generation(buf) == 1116925baeddSChris Mason root->fs_info->running_transaction->transid) { 1117b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 1118b4ce94deSChris Mason 1119b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { 1120b9473439SChris Mason spin_lock(&root->fs_info->delalloc_lock); 1121b9473439SChris Mason if (root->fs_info->dirty_metadata_bytes >= buf->len) 1122b9473439SChris Mason root->fs_info->dirty_metadata_bytes -= buf->len; 1123d5c13f92SJeff Mahoney else { 1124d5c13f92SJeff Mahoney spin_unlock(&root->fs_info->delalloc_lock); 1125d5c13f92SJeff Mahoney btrfs_panic(root->fs_info, -EOVERFLOW, 1126d5c13f92SJeff Mahoney "Can't clear %lu bytes from " 1127d5c13f92SJeff Mahoney " dirty_mdatadata_bytes (%lu)", 1128d5c13f92SJeff Mahoney buf->len, 1129d5c13f92SJeff Mahoney root->fs_info->dirty_metadata_bytes); 1130d5c13f92SJeff Mahoney } 1131b9473439SChris Mason spin_unlock(&root->fs_info->delalloc_lock); 1132b9473439SChris Mason } 1133b4ce94deSChris Mason 1134b9473439SChris Mason /* ugh, clear_extent_buffer_dirty needs to lock the page */ 1135b9473439SChris Mason btrfs_set_lock_blocking(buf); 1136d1310b2eSChris Mason clear_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, 113755c69072SChris Mason buf); 1138925baeddSChris Mason } 11395f39d397SChris Mason } 11405f39d397SChris Mason 1141143bede5SJeff Mahoney static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, 114287ee04ebSChris Mason u32 stripesize, struct btrfs_root *root, 11439f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 1144e20d96d6SChris Mason u64 objectid) 1145d97e63b6SChris Mason { 1146cfaa7295SChris Mason root->node = NULL; 1147a28ec197SChris Mason root->commit_root = NULL; 1148db94535dSChris Mason root->sectorsize = sectorsize; 1149db94535dSChris Mason root->nodesize = nodesize; 1150db94535dSChris Mason root->leafsize = leafsize; 115187ee04ebSChris Mason root->stripesize = stripesize; 1152123abc88SChris Mason root->ref_cows = 0; 11530b86a832SChris Mason root->track_dirty = 0; 1154c71bf099SYan, Zheng root->in_radix = 0; 1155d68fc57bSYan, Zheng root->orphan_item_inserted = 0; 1156d68fc57bSYan, Zheng root->orphan_cleanup_state = 0; 11570b86a832SChris Mason 11580f7d52f4SChris Mason root->objectid = objectid; 11590f7d52f4SChris Mason root->last_trans = 0; 116013a8a7c8SYan, Zheng root->highest_objectid = 0; 116158176a96SJosef Bacik root->name = NULL; 11626bef4d31SEric Paris root->inode_tree = RB_ROOT; 116316cdcec7SMiao Xie INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); 1164f0486c68SYan, Zheng root->block_rsv = NULL; 1165d68fc57bSYan, Zheng root->orphan_block_rsv = NULL; 11660b86a832SChris Mason 11670b86a832SChris Mason INIT_LIST_HEAD(&root->dirty_list); 11687b128766SJosef Bacik INIT_LIST_HEAD(&root->orphan_list); 11695d4f98a2SYan Zheng INIT_LIST_HEAD(&root->root_list); 1170d68fc57bSYan, Zheng spin_lock_init(&root->orphan_lock); 11715d4f98a2SYan Zheng spin_lock_init(&root->inode_lock); 1172f0486c68SYan, Zheng spin_lock_init(&root->accounting_lock); 1173a2135011SChris Mason mutex_init(&root->objectid_mutex); 1174e02119d5SChris Mason mutex_init(&root->log_mutex); 11757237f183SYan Zheng init_waitqueue_head(&root->log_writer_wait); 11767237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[0]); 11777237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[1]); 11787237f183SYan Zheng atomic_set(&root->log_commit[0], 0); 11797237f183SYan Zheng atomic_set(&root->log_commit[1], 0); 11807237f183SYan Zheng atomic_set(&root->log_writers, 0); 11817237f183SYan Zheng root->log_batch = 0; 11827237f183SYan Zheng root->log_transid = 0; 1183257c62e1SChris Mason root->last_log_commit = 0; 1184d0c803c4SChris Mason extent_io_tree_init(&root->dirty_log_pages, 1185f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 1186017e5369SChris Mason 11873768f368SChris Mason memset(&root->root_key, 0, sizeof(root->root_key)); 11883768f368SChris Mason memset(&root->root_item, 0, sizeof(root->root_item)); 11896702ed49SChris Mason memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); 119058176a96SJosef Bacik memset(&root->root_kobj, 0, sizeof(root->root_kobj)); 11913f157a2fSChris Mason root->defrag_trans_start = fs_info->generation; 119258176a96SJosef Bacik init_completion(&root->kobj_unregister); 11936702ed49SChris Mason root->defrag_running = 0; 11944d775673SChris Mason root->root_key.objectid = objectid; 11950ee5dc67SAl Viro root->anon_dev = 0; 11963768f368SChris Mason } 11973768f368SChris Mason 1198200a5c17SJeff Mahoney static int __must_check find_and_setup_root(struct btrfs_root *tree_root, 11999f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 12009f5fae2fSChris Mason u64 objectid, 1201e20d96d6SChris Mason struct btrfs_root *root) 12023768f368SChris Mason { 12033768f368SChris Mason int ret; 1204db94535dSChris Mason u32 blocksize; 120584234f3aSYan Zheng u64 generation; 12063768f368SChris Mason 1207db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 120887ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 120987ee04ebSChris Mason root, fs_info, objectid); 12103768f368SChris Mason ret = btrfs_find_last_root(tree_root, objectid, 12113768f368SChris Mason &root->root_item, &root->root_key); 12124df27c4dSYan, Zheng if (ret > 0) 12134df27c4dSYan, Zheng return -ENOENT; 1214200a5c17SJeff Mahoney else if (ret < 0) 1215200a5c17SJeff Mahoney return ret; 12163768f368SChris Mason 121784234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1218db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1219af31f5e5SChris Mason root->commit_root = NULL; 1220db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 122184234f3aSYan Zheng blocksize, generation); 122268433b73SChris Mason if (!root->node || !btrfs_buffer_uptodate(root->node, generation)) { 122368433b73SChris Mason free_extent_buffer(root->node); 1224af31f5e5SChris Mason root->node = NULL; 122568433b73SChris Mason return -EIO; 122668433b73SChris Mason } 12274df27c4dSYan, Zheng root->commit_root = btrfs_root_node(root); 1228d97e63b6SChris Mason return 0; 1229d97e63b6SChris Mason } 1230d97e63b6SChris Mason 1231f84a8bd6SAl Viro static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info) 12326f07e42eSAl Viro { 12336f07e42eSAl Viro struct btrfs_root *root = kzalloc(sizeof(*root), GFP_NOFS); 12346f07e42eSAl Viro if (root) 12356f07e42eSAl Viro root->fs_info = fs_info; 12366f07e42eSAl Viro return root; 12376f07e42eSAl Viro } 12386f07e42eSAl Viro 12397237f183SYan Zheng static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, 1240e02119d5SChris Mason struct btrfs_fs_info *fs_info) 12410f7d52f4SChris Mason { 12420f7d52f4SChris Mason struct btrfs_root *root; 12430f7d52f4SChris Mason struct btrfs_root *tree_root = fs_info->tree_root; 12447237f183SYan Zheng struct extent_buffer *leaf; 1245e02119d5SChris Mason 12466f07e42eSAl Viro root = btrfs_alloc_root(fs_info); 1247e02119d5SChris Mason if (!root) 12487237f183SYan Zheng return ERR_PTR(-ENOMEM); 1249e02119d5SChris Mason 1250e02119d5SChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 1251e02119d5SChris Mason tree_root->sectorsize, tree_root->stripesize, 1252e02119d5SChris Mason root, fs_info, BTRFS_TREE_LOG_OBJECTID); 1253e02119d5SChris Mason 1254e02119d5SChris Mason root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 1255e02119d5SChris Mason root->root_key.type = BTRFS_ROOT_ITEM_KEY; 1256e02119d5SChris Mason root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 12577237f183SYan Zheng /* 12587237f183SYan Zheng * log trees do not get reference counted because they go away 12597237f183SYan Zheng * before a real commit is actually done. They do store pointers 12607237f183SYan Zheng * to file data extents, and those reference counts still get 12617237f183SYan Zheng * updated (along with back refs to the log tree). 12627237f183SYan Zheng */ 1263e02119d5SChris Mason root->ref_cows = 0; 1264e02119d5SChris Mason 12655d4f98a2SYan Zheng leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, 126666d7e7f0SArne Jansen BTRFS_TREE_LOG_OBJECTID, NULL, 126766d7e7f0SArne Jansen 0, 0, 0, 0); 12687237f183SYan Zheng if (IS_ERR(leaf)) { 12697237f183SYan Zheng kfree(root); 12707237f183SYan Zheng return ERR_CAST(leaf); 12717237f183SYan Zheng } 1272e02119d5SChris Mason 12735d4f98a2SYan Zheng memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 12745d4f98a2SYan Zheng btrfs_set_header_bytenr(leaf, leaf->start); 12755d4f98a2SYan Zheng btrfs_set_header_generation(leaf, trans->transid); 12765d4f98a2SYan Zheng btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 12775d4f98a2SYan Zheng btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); 12787237f183SYan Zheng root->node = leaf; 1279e02119d5SChris Mason 1280e02119d5SChris Mason write_extent_buffer(root->node, root->fs_info->fsid, 1281e02119d5SChris Mason (unsigned long)btrfs_header_fsid(root->node), 1282e02119d5SChris Mason BTRFS_FSID_SIZE); 1283e02119d5SChris Mason btrfs_mark_buffer_dirty(root->node); 1284e02119d5SChris Mason btrfs_tree_unlock(root->node); 12857237f183SYan Zheng return root; 12867237f183SYan Zheng } 12877237f183SYan Zheng 12887237f183SYan Zheng int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 12897237f183SYan Zheng struct btrfs_fs_info *fs_info) 12907237f183SYan Zheng { 12917237f183SYan Zheng struct btrfs_root *log_root; 12927237f183SYan Zheng 12937237f183SYan Zheng log_root = alloc_log_tree(trans, fs_info); 12947237f183SYan Zheng if (IS_ERR(log_root)) 12957237f183SYan Zheng return PTR_ERR(log_root); 12967237f183SYan Zheng WARN_ON(fs_info->log_root_tree); 12977237f183SYan Zheng fs_info->log_root_tree = log_root; 12987237f183SYan Zheng return 0; 12997237f183SYan Zheng } 13007237f183SYan Zheng 13017237f183SYan Zheng int btrfs_add_log_tree(struct btrfs_trans_handle *trans, 13027237f183SYan Zheng struct btrfs_root *root) 13037237f183SYan Zheng { 13047237f183SYan Zheng struct btrfs_root *log_root; 13057237f183SYan Zheng struct btrfs_inode_item *inode_item; 13067237f183SYan Zheng 13077237f183SYan Zheng log_root = alloc_log_tree(trans, root->fs_info); 13087237f183SYan Zheng if (IS_ERR(log_root)) 13097237f183SYan Zheng return PTR_ERR(log_root); 13107237f183SYan Zheng 13117237f183SYan Zheng log_root->last_trans = trans->transid; 13127237f183SYan Zheng log_root->root_key.offset = root->root_key.objectid; 13137237f183SYan Zheng 13147237f183SYan Zheng inode_item = &log_root->root_item.inode; 13157237f183SYan Zheng inode_item->generation = cpu_to_le64(1); 13167237f183SYan Zheng inode_item->size = cpu_to_le64(3); 13177237f183SYan Zheng inode_item->nlink = cpu_to_le32(1); 13187237f183SYan Zheng inode_item->nbytes = cpu_to_le64(root->leafsize); 13197237f183SYan Zheng inode_item->mode = cpu_to_le32(S_IFDIR | 0755); 13207237f183SYan Zheng 13215d4f98a2SYan Zheng btrfs_set_root_node(&log_root->root_item, log_root->node); 13227237f183SYan Zheng 13237237f183SYan Zheng WARN_ON(root->log_root); 13247237f183SYan Zheng root->log_root = log_root; 13257237f183SYan Zheng root->log_transid = 0; 1326257c62e1SChris Mason root->last_log_commit = 0; 1327e02119d5SChris Mason return 0; 1328e02119d5SChris Mason } 1329e02119d5SChris Mason 1330e02119d5SChris Mason struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, 1331e02119d5SChris Mason struct btrfs_key *location) 1332e02119d5SChris Mason { 1333e02119d5SChris Mason struct btrfs_root *root; 1334e02119d5SChris Mason struct btrfs_fs_info *fs_info = tree_root->fs_info; 13350f7d52f4SChris Mason struct btrfs_path *path; 13365f39d397SChris Mason struct extent_buffer *l; 133784234f3aSYan Zheng u64 generation; 1338db94535dSChris Mason u32 blocksize; 13390f7d52f4SChris Mason int ret = 0; 13400f7d52f4SChris Mason 13416f07e42eSAl Viro root = btrfs_alloc_root(fs_info); 13420cf6c620SChris Mason if (!root) 13430f7d52f4SChris Mason return ERR_PTR(-ENOMEM); 13440f7d52f4SChris Mason if (location->offset == (u64)-1) { 1345db94535dSChris Mason ret = find_and_setup_root(tree_root, fs_info, 13460f7d52f4SChris Mason location->objectid, root); 13470f7d52f4SChris Mason if (ret) { 13480f7d52f4SChris Mason kfree(root); 13490f7d52f4SChris Mason return ERR_PTR(ret); 13500f7d52f4SChris Mason } 135113a8a7c8SYan, Zheng goto out; 13520f7d52f4SChris Mason } 13530f7d52f4SChris Mason 1354db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 135587ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 135687ee04ebSChris Mason root, fs_info, location->objectid); 13570f7d52f4SChris Mason 13580f7d52f4SChris Mason path = btrfs_alloc_path(); 1359db5b493aSTsutomu Itoh if (!path) { 1360db5b493aSTsutomu Itoh kfree(root); 1361db5b493aSTsutomu Itoh return ERR_PTR(-ENOMEM); 1362db5b493aSTsutomu Itoh } 13630f7d52f4SChris Mason ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); 136413a8a7c8SYan, Zheng if (ret == 0) { 13655f39d397SChris Mason l = path->nodes[0]; 13665f39d397SChris Mason read_extent_buffer(l, &root->root_item, 13675f39d397SChris Mason btrfs_item_ptr_offset(l, path->slots[0]), 13680f7d52f4SChris Mason sizeof(root->root_item)); 136944b36eb2SYan Zheng memcpy(&root->root_key, location, sizeof(*location)); 137013a8a7c8SYan, Zheng } 13710f7d52f4SChris Mason btrfs_free_path(path); 13720f7d52f4SChris Mason if (ret) { 13735e540f77STsutomu Itoh kfree(root); 137413a8a7c8SYan, Zheng if (ret > 0) 137513a8a7c8SYan, Zheng ret = -ENOENT; 13760f7d52f4SChris Mason return ERR_PTR(ret); 13770f7d52f4SChris Mason } 137813a8a7c8SYan, Zheng 137984234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1380db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1381db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 138284234f3aSYan Zheng blocksize, generation); 13835d4f98a2SYan Zheng root->commit_root = btrfs_root_node(root); 13840f7d52f4SChris Mason BUG_ON(!root->node); 138513a8a7c8SYan, Zheng out: 138608fe4db1SLi Zefan if (location->objectid != BTRFS_TREE_LOG_OBJECTID) { 13870f7d52f4SChris Mason root->ref_cows = 1; 138808fe4db1SLi Zefan btrfs_check_and_init_root_item(&root->root_item); 138908fe4db1SLi Zefan } 139013a8a7c8SYan, Zheng 13915eda7b5eSChris Mason return root; 13925eda7b5eSChris Mason } 13935eda7b5eSChris Mason 1394edbd8d4eSChris Mason struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, 1395edbd8d4eSChris Mason struct btrfs_key *location) 13965eda7b5eSChris Mason { 13975eda7b5eSChris Mason struct btrfs_root *root; 13985eda7b5eSChris Mason int ret; 13995eda7b5eSChris Mason 1400edbd8d4eSChris Mason if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) 1401edbd8d4eSChris Mason return fs_info->tree_root; 1402edbd8d4eSChris Mason if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) 1403edbd8d4eSChris Mason return fs_info->extent_root; 14048f18cf13SChris Mason if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) 14058f18cf13SChris Mason return fs_info->chunk_root; 14068f18cf13SChris Mason if (location->objectid == BTRFS_DEV_TREE_OBJECTID) 14078f18cf13SChris Mason return fs_info->dev_root; 14080403e47eSYan Zheng if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) 14090403e47eSYan Zheng return fs_info->csum_root; 14104df27c4dSYan, Zheng again: 14114df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 14125eda7b5eSChris Mason root = radix_tree_lookup(&fs_info->fs_roots_radix, 14135eda7b5eSChris Mason (unsigned long)location->objectid); 14144df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 14155eda7b5eSChris Mason if (root) 14165eda7b5eSChris Mason return root; 14175eda7b5eSChris Mason 1418e02119d5SChris Mason root = btrfs_read_fs_root_no_radix(fs_info->tree_root, location); 14195eda7b5eSChris Mason if (IS_ERR(root)) 14205eda7b5eSChris Mason return root; 14213394e160SChris Mason 1422581bb050SLi Zefan root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); 1423581bb050SLi Zefan root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), 1424581bb050SLi Zefan GFP_NOFS); 142535a30d7cSDavid Sterba if (!root->free_ino_pinned || !root->free_ino_ctl) { 142635a30d7cSDavid Sterba ret = -ENOMEM; 1427581bb050SLi Zefan goto fail; 142835a30d7cSDavid Sterba } 1429581bb050SLi Zefan 1430581bb050SLi Zefan btrfs_init_free_ino_ctl(root); 1431581bb050SLi Zefan mutex_init(&root->fs_commit_mutex); 1432581bb050SLi Zefan spin_lock_init(&root->cache_lock); 1433581bb050SLi Zefan init_waitqueue_head(&root->cache_wait); 1434581bb050SLi Zefan 14350ee5dc67SAl Viro ret = get_anon_bdev(&root->anon_dev); 1436ac08aedfSChris Mason if (ret) 1437ac08aedfSChris Mason goto fail; 14383394e160SChris Mason 1439d68fc57bSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) { 1440d68fc57bSYan, Zheng ret = -ENOENT; 1441d68fc57bSYan, Zheng goto fail; 1442d68fc57bSYan, Zheng } 1443d68fc57bSYan, Zheng 1444d68fc57bSYan, Zheng ret = btrfs_find_orphan_item(fs_info->tree_root, location->objectid); 1445d68fc57bSYan, Zheng if (ret < 0) 1446d68fc57bSYan, Zheng goto fail; 1447d68fc57bSYan, Zheng if (ret == 0) 1448d68fc57bSYan, Zheng root->orphan_item_inserted = 1; 1449d68fc57bSYan, Zheng 14504df27c4dSYan, Zheng ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); 14514df27c4dSYan, Zheng if (ret) 14524df27c4dSYan, Zheng goto fail; 14534df27c4dSYan, Zheng 14544df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 14552619ba1fSChris Mason ret = radix_tree_insert(&fs_info->fs_roots_radix, 14562619ba1fSChris Mason (unsigned long)root->root_key.objectid, 14570f7d52f4SChris Mason root); 1458d68fc57bSYan, Zheng if (ret == 0) 14594df27c4dSYan, Zheng root->in_radix = 1; 1460d68fc57bSYan, Zheng 14614df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 14624df27c4dSYan, Zheng radix_tree_preload_end(); 14630f7d52f4SChris Mason if (ret) { 14644df27c4dSYan, Zheng if (ret == -EEXIST) { 14654df27c4dSYan, Zheng free_fs_root(root); 14664df27c4dSYan, Zheng goto again; 14670f7d52f4SChris Mason } 14684df27c4dSYan, Zheng goto fail; 14694df27c4dSYan, Zheng } 14704df27c4dSYan, Zheng 1471edbd8d4eSChris Mason ret = btrfs_find_dead_roots(fs_info->tree_root, 14725d4f98a2SYan Zheng root->root_key.objectid); 14734df27c4dSYan, Zheng WARN_ON(ret); 1474edbd8d4eSChris Mason return root; 14754df27c4dSYan, Zheng fail: 14764df27c4dSYan, Zheng free_fs_root(root); 14774df27c4dSYan, Zheng return ERR_PTR(ret); 1478edbd8d4eSChris Mason } 1479edbd8d4eSChris Mason 148004160088SChris Mason static int btrfs_congested_fn(void *congested_data, int bdi_bits) 148104160088SChris Mason { 148204160088SChris Mason struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; 148304160088SChris Mason int ret = 0; 148404160088SChris Mason struct btrfs_device *device; 148504160088SChris Mason struct backing_dev_info *bdi; 1486b7967db7SChris Mason 14871f78160cSXiao Guangrong rcu_read_lock(); 14881f78160cSXiao Guangrong list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { 1489dfe25020SChris Mason if (!device->bdev) 1490dfe25020SChris Mason continue; 149104160088SChris Mason bdi = blk_get_backing_dev_info(device->bdev); 149204160088SChris Mason if (bdi && bdi_congested(bdi, bdi_bits)) { 149304160088SChris Mason ret = 1; 149404160088SChris Mason break; 149504160088SChris Mason } 149604160088SChris Mason } 14971f78160cSXiao Guangrong rcu_read_unlock(); 149804160088SChris Mason return ret; 149904160088SChris Mason } 150004160088SChris Mason 150138b66988SChris Mason /* 1502ad081f14SJens Axboe * If this fails, caller must call bdi_destroy() to get rid of the 1503ad081f14SJens Axboe * bdi again. 1504ad081f14SJens Axboe */ 150504160088SChris Mason static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) 150604160088SChris Mason { 1507ad081f14SJens Axboe int err; 1508ad081f14SJens Axboe 1509ad081f14SJens Axboe bdi->capabilities = BDI_CAP_MAP_COPY; 1510e6d086d8SJens Axboe err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY); 1511ad081f14SJens Axboe if (err) 1512ad081f14SJens Axboe return err; 1513ad081f14SJens Axboe 15144575c9ccSChris Mason bdi->ra_pages = default_backing_dev_info.ra_pages; 151504160088SChris Mason bdi->congested_fn = btrfs_congested_fn; 151604160088SChris Mason bdi->congested_data = info; 151704160088SChris Mason return 0; 151804160088SChris Mason } 151904160088SChris Mason 1520ce9adaa5SChris Mason static int bio_ready_for_csum(struct bio *bio) 1521ce9adaa5SChris Mason { 1522ce9adaa5SChris Mason u64 length = 0; 1523ce9adaa5SChris Mason u64 buf_len = 0; 1524ce9adaa5SChris Mason u64 start = 0; 1525ce9adaa5SChris Mason struct page *page; 1526ce9adaa5SChris Mason struct extent_io_tree *io_tree = NULL; 1527ce9adaa5SChris Mason struct bio_vec *bvec; 1528ce9adaa5SChris Mason int i; 1529ce9adaa5SChris Mason int ret; 1530ce9adaa5SChris Mason 1531ce9adaa5SChris Mason bio_for_each_segment(bvec, bio, i) { 1532ce9adaa5SChris Mason page = bvec->bv_page; 1533ce9adaa5SChris Mason if (page->private == EXTENT_PAGE_PRIVATE) { 1534ce9adaa5SChris Mason length += bvec->bv_len; 1535ce9adaa5SChris Mason continue; 1536ce9adaa5SChris Mason } 1537ce9adaa5SChris Mason if (!page->private) { 1538ce9adaa5SChris Mason length += bvec->bv_len; 1539ce9adaa5SChris Mason continue; 1540ce9adaa5SChris Mason } 1541ce9adaa5SChris Mason length = bvec->bv_len; 1542ce9adaa5SChris Mason buf_len = page->private >> 2; 1543ce9adaa5SChris Mason start = page_offset(page) + bvec->bv_offset; 1544ce9adaa5SChris Mason io_tree = &BTRFS_I(page->mapping->host)->io_tree; 1545ce9adaa5SChris Mason } 1546ce9adaa5SChris Mason /* are we fully contained in this bio? */ 1547ce9adaa5SChris Mason if (buf_len <= length) 1548ce9adaa5SChris Mason return 1; 1549ce9adaa5SChris Mason 1550ce9adaa5SChris Mason ret = extent_range_uptodate(io_tree, start + length, 1551ce9adaa5SChris Mason start + buf_len - 1); 1552ce9adaa5SChris Mason return ret; 1553ce9adaa5SChris Mason } 1554ce9adaa5SChris Mason 15558b712842SChris Mason /* 15568b712842SChris Mason * called by the kthread helper functions to finally call the bio end_io 15578b712842SChris Mason * functions. This is where read checksum verification actually happens 15588b712842SChris Mason */ 15598b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work) 1560ce9adaa5SChris Mason { 1561ce9adaa5SChris Mason struct bio *bio; 15628b712842SChris Mason struct end_io_wq *end_io_wq; 15638b712842SChris Mason struct btrfs_fs_info *fs_info; 1564ce9adaa5SChris Mason int error; 1565ce9adaa5SChris Mason 15668b712842SChris Mason end_io_wq = container_of(work, struct end_io_wq, work); 1567ce9adaa5SChris Mason bio = end_io_wq->bio; 15688b712842SChris Mason fs_info = end_io_wq->info; 15698b712842SChris Mason 1570cad321adSChris Mason /* metadata bio reads are special because the whole tree block must 15718b712842SChris Mason * be checksummed at once. This makes sure the entire block is in 15728b712842SChris Mason * ram and up to date before trying to verify things. For 15738b712842SChris Mason * blocksize <= pagesize, it is basically a noop 15748b712842SChris Mason */ 15757b6d91daSChristoph Hellwig if (!(bio->bi_rw & REQ_WRITE) && end_io_wq->metadata && 1576cad321adSChris Mason !bio_ready_for_csum(bio)) { 1577d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_meta_workers, 15788b712842SChris Mason &end_io_wq->work); 1579ce9adaa5SChris Mason return; 1580ce9adaa5SChris Mason } 1581ce9adaa5SChris Mason error = end_io_wq->error; 1582ce9adaa5SChris Mason bio->bi_private = end_io_wq->private; 1583ce9adaa5SChris Mason bio->bi_end_io = end_io_wq->end_io; 1584ce9adaa5SChris Mason kfree(end_io_wq); 1585ce9adaa5SChris Mason bio_endio(bio, error); 1586ce9adaa5SChris Mason } 158744b8bd7eSChris Mason 1588a74a4b97SChris Mason static int cleaner_kthread(void *arg) 1589a74a4b97SChris Mason { 1590a74a4b97SChris Mason struct btrfs_root *root = arg; 1591a74a4b97SChris Mason 1592a74a4b97SChris Mason do { 1593a74a4b97SChris Mason vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE); 159476dda93cSYan, Zheng 159576dda93cSYan, Zheng if (!(root->fs_info->sb->s_flags & MS_RDONLY) && 159676dda93cSYan, Zheng mutex_trylock(&root->fs_info->cleaner_mutex)) { 159724bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 1598a74a4b97SChris Mason btrfs_clean_old_snapshots(root); 1599a74a4b97SChris Mason mutex_unlock(&root->fs_info->cleaner_mutex); 16004cb5300bSChris Mason btrfs_run_defrag_inodes(root->fs_info); 160176dda93cSYan, Zheng } 1602a74a4b97SChris Mason 1603a0acae0eSTejun Heo if (!try_to_freeze()) { 1604a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 16058929ecfaSYan, Zheng if (!kthread_should_stop()) 1606a74a4b97SChris Mason schedule(); 1607a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1608a74a4b97SChris Mason } 1609a74a4b97SChris Mason } while (!kthread_should_stop()); 1610a74a4b97SChris Mason return 0; 1611a74a4b97SChris Mason } 1612a74a4b97SChris Mason 1613a74a4b97SChris Mason static int transaction_kthread(void *arg) 1614a74a4b97SChris Mason { 1615a74a4b97SChris Mason struct btrfs_root *root = arg; 1616a74a4b97SChris Mason struct btrfs_trans_handle *trans; 1617a74a4b97SChris Mason struct btrfs_transaction *cur; 16188929ecfaSYan, Zheng u64 transid; 1619a74a4b97SChris Mason unsigned long now; 1620a74a4b97SChris Mason unsigned long delay; 1621a74a4b97SChris Mason int ret; 1622a74a4b97SChris Mason 1623a74a4b97SChris Mason do { 1624a74a4b97SChris Mason delay = HZ * 30; 1625a74a4b97SChris Mason vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE); 1626a74a4b97SChris Mason mutex_lock(&root->fs_info->transaction_kthread_mutex); 1627a74a4b97SChris Mason 1628a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 1629a74a4b97SChris Mason cur = root->fs_info->running_transaction; 1630a74a4b97SChris Mason if (!cur) { 1631a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1632a74a4b97SChris Mason goto sleep; 1633a74a4b97SChris Mason } 163431153d81SYan Zheng 1635a74a4b97SChris Mason now = get_seconds(); 16368929ecfaSYan, Zheng if (!cur->blocked && 16378929ecfaSYan, Zheng (now < cur->start_time || now - cur->start_time < 30)) { 1638a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1639a74a4b97SChris Mason delay = HZ * 5; 1640a74a4b97SChris Mason goto sleep; 1641a74a4b97SChris Mason } 16428929ecfaSYan, Zheng transid = cur->transid; 1643a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 164456bec294SChris Mason 16457a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 16463612b495STsutomu Itoh BUG_ON(IS_ERR(trans)); 16478929ecfaSYan, Zheng if (transid == trans->transid) { 16488929ecfaSYan, Zheng ret = btrfs_commit_transaction(trans, root); 16498929ecfaSYan, Zheng BUG_ON(ret); 16508929ecfaSYan, Zheng } else { 16518929ecfaSYan, Zheng btrfs_end_transaction(trans, root); 16528929ecfaSYan, Zheng } 1653a74a4b97SChris Mason sleep: 1654a74a4b97SChris Mason wake_up_process(root->fs_info->cleaner_kthread); 1655a74a4b97SChris Mason mutex_unlock(&root->fs_info->transaction_kthread_mutex); 1656a74a4b97SChris Mason 1657a0acae0eSTejun Heo if (!try_to_freeze()) { 1658a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 16598929ecfaSYan, Zheng if (!kthread_should_stop() && 16608929ecfaSYan, Zheng !btrfs_transaction_blocked(root->fs_info)) 1661a74a4b97SChris Mason schedule_timeout(delay); 1662a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1663a74a4b97SChris Mason } 1664a74a4b97SChris Mason } while (!kthread_should_stop()); 1665a74a4b97SChris Mason return 0; 1666a74a4b97SChris Mason } 1667a74a4b97SChris Mason 1668af31f5e5SChris Mason /* 1669af31f5e5SChris Mason * this will find the highest generation in the array of 1670af31f5e5SChris Mason * root backups. The index of the highest array is returned, 1671af31f5e5SChris Mason * or -1 if we can't find anything. 1672af31f5e5SChris Mason * 1673af31f5e5SChris Mason * We check to make sure the array is valid by comparing the 1674af31f5e5SChris Mason * generation of the latest root in the array with the generation 1675af31f5e5SChris Mason * in the super block. If they don't match we pitch it. 1676af31f5e5SChris Mason */ 1677af31f5e5SChris Mason static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) 1678af31f5e5SChris Mason { 1679af31f5e5SChris Mason u64 cur; 1680af31f5e5SChris Mason int newest_index = -1; 1681af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1682af31f5e5SChris Mason int i; 1683af31f5e5SChris Mason 1684af31f5e5SChris Mason for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 1685af31f5e5SChris Mason root_backup = info->super_copy->super_roots + i; 1686af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1687af31f5e5SChris Mason if (cur == newest_gen) 1688af31f5e5SChris Mason newest_index = i; 1689af31f5e5SChris Mason } 1690af31f5e5SChris Mason 1691af31f5e5SChris Mason /* check to see if we actually wrapped around */ 1692af31f5e5SChris Mason if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { 1693af31f5e5SChris Mason root_backup = info->super_copy->super_roots; 1694af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1695af31f5e5SChris Mason if (cur == newest_gen) 1696af31f5e5SChris Mason newest_index = 0; 1697af31f5e5SChris Mason } 1698af31f5e5SChris Mason return newest_index; 1699af31f5e5SChris Mason } 1700af31f5e5SChris Mason 1701af31f5e5SChris Mason 1702af31f5e5SChris Mason /* 1703af31f5e5SChris Mason * find the oldest backup so we know where to store new entries 1704af31f5e5SChris Mason * in the backup array. This will set the backup_root_index 1705af31f5e5SChris Mason * field in the fs_info struct 1706af31f5e5SChris Mason */ 1707af31f5e5SChris Mason static void find_oldest_super_backup(struct btrfs_fs_info *info, 1708af31f5e5SChris Mason u64 newest_gen) 1709af31f5e5SChris Mason { 1710af31f5e5SChris Mason int newest_index = -1; 1711af31f5e5SChris Mason 1712af31f5e5SChris Mason newest_index = find_newest_super_backup(info, newest_gen); 1713af31f5e5SChris Mason /* if there was garbage in there, just move along */ 1714af31f5e5SChris Mason if (newest_index == -1) { 1715af31f5e5SChris Mason info->backup_root_index = 0; 1716af31f5e5SChris Mason } else { 1717af31f5e5SChris Mason info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; 1718af31f5e5SChris Mason } 1719af31f5e5SChris Mason } 1720af31f5e5SChris Mason 1721af31f5e5SChris Mason /* 1722af31f5e5SChris Mason * copy all the root pointers into the super backup array. 1723af31f5e5SChris Mason * this will bump the backup pointer by one when it is 1724af31f5e5SChris Mason * done 1725af31f5e5SChris Mason */ 1726af31f5e5SChris Mason static void backup_super_roots(struct btrfs_fs_info *info) 1727af31f5e5SChris Mason { 1728af31f5e5SChris Mason int next_backup; 1729af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1730af31f5e5SChris Mason int last_backup; 1731af31f5e5SChris Mason 1732af31f5e5SChris Mason next_backup = info->backup_root_index; 1733af31f5e5SChris Mason last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % 1734af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1735af31f5e5SChris Mason 1736af31f5e5SChris Mason /* 1737af31f5e5SChris Mason * just overwrite the last backup if we're at the same generation 1738af31f5e5SChris Mason * this happens only at umount 1739af31f5e5SChris Mason */ 1740af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + last_backup; 1741af31f5e5SChris Mason if (btrfs_backup_tree_root_gen(root_backup) == 1742af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)) 1743af31f5e5SChris Mason next_backup = last_backup; 1744af31f5e5SChris Mason 1745af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + next_backup; 1746af31f5e5SChris Mason 1747af31f5e5SChris Mason /* 1748af31f5e5SChris Mason * make sure all of our padding and empty slots get zero filled 1749af31f5e5SChris Mason * regardless of which ones we use today 1750af31f5e5SChris Mason */ 1751af31f5e5SChris Mason memset(root_backup, 0, sizeof(*root_backup)); 1752af31f5e5SChris Mason 1753af31f5e5SChris Mason info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; 1754af31f5e5SChris Mason 1755af31f5e5SChris Mason btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); 1756af31f5e5SChris Mason btrfs_set_backup_tree_root_gen(root_backup, 1757af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)); 1758af31f5e5SChris Mason 1759af31f5e5SChris Mason btrfs_set_backup_tree_root_level(root_backup, 1760af31f5e5SChris Mason btrfs_header_level(info->tree_root->node)); 1761af31f5e5SChris Mason 1762af31f5e5SChris Mason btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); 1763af31f5e5SChris Mason btrfs_set_backup_chunk_root_gen(root_backup, 1764af31f5e5SChris Mason btrfs_header_generation(info->chunk_root->node)); 1765af31f5e5SChris Mason btrfs_set_backup_chunk_root_level(root_backup, 1766af31f5e5SChris Mason btrfs_header_level(info->chunk_root->node)); 1767af31f5e5SChris Mason 1768af31f5e5SChris Mason btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); 1769af31f5e5SChris Mason btrfs_set_backup_extent_root_gen(root_backup, 1770af31f5e5SChris Mason btrfs_header_generation(info->extent_root->node)); 1771af31f5e5SChris Mason btrfs_set_backup_extent_root_level(root_backup, 1772af31f5e5SChris Mason btrfs_header_level(info->extent_root->node)); 1773af31f5e5SChris Mason 17747c7e82a7SChris Mason /* 17757c7e82a7SChris Mason * we might commit during log recovery, which happens before we set 17767c7e82a7SChris Mason * the fs_root. Make sure it is valid before we fill it in. 17777c7e82a7SChris Mason */ 17787c7e82a7SChris Mason if (info->fs_root && info->fs_root->node) { 17797c7e82a7SChris Mason btrfs_set_backup_fs_root(root_backup, 17807c7e82a7SChris Mason info->fs_root->node->start); 1781af31f5e5SChris Mason btrfs_set_backup_fs_root_gen(root_backup, 1782af31f5e5SChris Mason btrfs_header_generation(info->fs_root->node)); 1783af31f5e5SChris Mason btrfs_set_backup_fs_root_level(root_backup, 1784af31f5e5SChris Mason btrfs_header_level(info->fs_root->node)); 17857c7e82a7SChris Mason } 1786af31f5e5SChris Mason 1787af31f5e5SChris Mason btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); 1788af31f5e5SChris Mason btrfs_set_backup_dev_root_gen(root_backup, 1789af31f5e5SChris Mason btrfs_header_generation(info->dev_root->node)); 1790af31f5e5SChris Mason btrfs_set_backup_dev_root_level(root_backup, 1791af31f5e5SChris Mason btrfs_header_level(info->dev_root->node)); 1792af31f5e5SChris Mason 1793af31f5e5SChris Mason btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); 1794af31f5e5SChris Mason btrfs_set_backup_csum_root_gen(root_backup, 1795af31f5e5SChris Mason btrfs_header_generation(info->csum_root->node)); 1796af31f5e5SChris Mason btrfs_set_backup_csum_root_level(root_backup, 1797af31f5e5SChris Mason btrfs_header_level(info->csum_root->node)); 1798af31f5e5SChris Mason 1799af31f5e5SChris Mason btrfs_set_backup_total_bytes(root_backup, 1800af31f5e5SChris Mason btrfs_super_total_bytes(info->super_copy)); 1801af31f5e5SChris Mason btrfs_set_backup_bytes_used(root_backup, 1802af31f5e5SChris Mason btrfs_super_bytes_used(info->super_copy)); 1803af31f5e5SChris Mason btrfs_set_backup_num_devices(root_backup, 1804af31f5e5SChris Mason btrfs_super_num_devices(info->super_copy)); 1805af31f5e5SChris Mason 1806af31f5e5SChris Mason /* 1807af31f5e5SChris Mason * if we don't copy this out to the super_copy, it won't get remembered 1808af31f5e5SChris Mason * for the next commit 1809af31f5e5SChris Mason */ 1810af31f5e5SChris Mason memcpy(&info->super_copy->super_roots, 1811af31f5e5SChris Mason &info->super_for_commit->super_roots, 1812af31f5e5SChris Mason sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); 1813af31f5e5SChris Mason } 1814af31f5e5SChris Mason 1815af31f5e5SChris Mason /* 1816af31f5e5SChris Mason * this copies info out of the root backup array and back into 1817af31f5e5SChris Mason * the in-memory super block. It is meant to help iterate through 1818af31f5e5SChris Mason * the array, so you send it the number of backups you've already 1819af31f5e5SChris Mason * tried and the last backup index you used. 1820af31f5e5SChris Mason * 1821af31f5e5SChris Mason * this returns -1 when it has tried all the backups 1822af31f5e5SChris Mason */ 1823af31f5e5SChris Mason static noinline int next_root_backup(struct btrfs_fs_info *info, 1824af31f5e5SChris Mason struct btrfs_super_block *super, 1825af31f5e5SChris Mason int *num_backups_tried, int *backup_index) 1826af31f5e5SChris Mason { 1827af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1828af31f5e5SChris Mason int newest = *backup_index; 1829af31f5e5SChris Mason 1830af31f5e5SChris Mason if (*num_backups_tried == 0) { 1831af31f5e5SChris Mason u64 gen = btrfs_super_generation(super); 1832af31f5e5SChris Mason 1833af31f5e5SChris Mason newest = find_newest_super_backup(info, gen); 1834af31f5e5SChris Mason if (newest == -1) 1835af31f5e5SChris Mason return -1; 1836af31f5e5SChris Mason 1837af31f5e5SChris Mason *backup_index = newest; 1838af31f5e5SChris Mason *num_backups_tried = 1; 1839af31f5e5SChris Mason } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { 1840af31f5e5SChris Mason /* we've tried all the backups, all done */ 1841af31f5e5SChris Mason return -1; 1842af31f5e5SChris Mason } else { 1843af31f5e5SChris Mason /* jump to the next oldest backup */ 1844af31f5e5SChris Mason newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % 1845af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1846af31f5e5SChris Mason *backup_index = newest; 1847af31f5e5SChris Mason *num_backups_tried += 1; 1848af31f5e5SChris Mason } 1849af31f5e5SChris Mason root_backup = super->super_roots + newest; 1850af31f5e5SChris Mason 1851af31f5e5SChris Mason btrfs_set_super_generation(super, 1852af31f5e5SChris Mason btrfs_backup_tree_root_gen(root_backup)); 1853af31f5e5SChris Mason btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); 1854af31f5e5SChris Mason btrfs_set_super_root_level(super, 1855af31f5e5SChris Mason btrfs_backup_tree_root_level(root_backup)); 1856af31f5e5SChris Mason btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); 1857af31f5e5SChris Mason 1858af31f5e5SChris Mason /* 1859af31f5e5SChris Mason * fixme: the total bytes and num_devices need to match or we should 1860af31f5e5SChris Mason * need a fsck 1861af31f5e5SChris Mason */ 1862af31f5e5SChris Mason btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); 1863af31f5e5SChris Mason btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); 1864af31f5e5SChris Mason return 0; 1865af31f5e5SChris Mason } 1866af31f5e5SChris Mason 1867af31f5e5SChris Mason /* helper to cleanup tree roots */ 1868af31f5e5SChris Mason static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) 1869af31f5e5SChris Mason { 1870af31f5e5SChris Mason free_extent_buffer(info->tree_root->node); 1871af31f5e5SChris Mason free_extent_buffer(info->tree_root->commit_root); 1872af31f5e5SChris Mason free_extent_buffer(info->dev_root->node); 1873af31f5e5SChris Mason free_extent_buffer(info->dev_root->commit_root); 1874af31f5e5SChris Mason free_extent_buffer(info->extent_root->node); 1875af31f5e5SChris Mason free_extent_buffer(info->extent_root->commit_root); 1876af31f5e5SChris Mason free_extent_buffer(info->csum_root->node); 1877af31f5e5SChris Mason free_extent_buffer(info->csum_root->commit_root); 1878af31f5e5SChris Mason 1879af31f5e5SChris Mason info->tree_root->node = NULL; 1880af31f5e5SChris Mason info->tree_root->commit_root = NULL; 1881af31f5e5SChris Mason info->dev_root->node = NULL; 1882af31f5e5SChris Mason info->dev_root->commit_root = NULL; 1883af31f5e5SChris Mason info->extent_root->node = NULL; 1884af31f5e5SChris Mason info->extent_root->commit_root = NULL; 1885af31f5e5SChris Mason info->csum_root->node = NULL; 1886af31f5e5SChris Mason info->csum_root->commit_root = NULL; 1887af31f5e5SChris Mason 1888af31f5e5SChris Mason if (chunk_root) { 1889af31f5e5SChris Mason free_extent_buffer(info->chunk_root->node); 1890af31f5e5SChris Mason free_extent_buffer(info->chunk_root->commit_root); 1891af31f5e5SChris Mason info->chunk_root->node = NULL; 1892af31f5e5SChris Mason info->chunk_root->commit_root = NULL; 1893af31f5e5SChris Mason } 1894af31f5e5SChris Mason } 1895af31f5e5SChris Mason 1896af31f5e5SChris Mason 1897ad2b2c80SAl Viro int open_ctree(struct super_block *sb, 1898dfe25020SChris Mason struct btrfs_fs_devices *fs_devices, 1899dfe25020SChris Mason char *options) 1900eb60ceacSChris Mason { 1901db94535dSChris Mason u32 sectorsize; 1902db94535dSChris Mason u32 nodesize; 1903db94535dSChris Mason u32 leafsize; 1904db94535dSChris Mason u32 blocksize; 190587ee04ebSChris Mason u32 stripesize; 190684234f3aSYan Zheng u64 generation; 1907f2b636e8SJosef Bacik u64 features; 19083de4586cSChris Mason struct btrfs_key location; 1909a061fc8dSChris Mason struct buffer_head *bh; 19104d34b278SIlya Dryomov struct btrfs_super_block *disk_super; 1911815745cfSAl Viro struct btrfs_fs_info *fs_info = btrfs_sb(sb); 1912f84a8bd6SAl Viro struct btrfs_root *tree_root; 19134d34b278SIlya Dryomov struct btrfs_root *extent_root; 19144d34b278SIlya Dryomov struct btrfs_root *csum_root; 19154d34b278SIlya Dryomov struct btrfs_root *chunk_root; 19164d34b278SIlya Dryomov struct btrfs_root *dev_root; 1917e02119d5SChris Mason struct btrfs_root *log_tree_root; 1918eb60ceacSChris Mason int ret; 1919e58ca020SYan int err = -EINVAL; 1920af31f5e5SChris Mason int num_backups_tried = 0; 1921af31f5e5SChris Mason int backup_index = 0; 19224543df7eSChris Mason 1923f84a8bd6SAl Viro tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info); 19246f07e42eSAl Viro extent_root = fs_info->extent_root = btrfs_alloc_root(fs_info); 19256f07e42eSAl Viro csum_root = fs_info->csum_root = btrfs_alloc_root(fs_info); 19266f07e42eSAl Viro chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info); 19276f07e42eSAl Viro dev_root = fs_info->dev_root = btrfs_alloc_root(fs_info); 19288790d502SChris Mason 1929f84a8bd6SAl Viro if (!tree_root || !extent_root || !csum_root || 1930f84a8bd6SAl Viro !chunk_root || !dev_root) { 193139279cc3SChris Mason err = -ENOMEM; 193239279cc3SChris Mason goto fail; 193339279cc3SChris Mason } 193476dda93cSYan, Zheng 193576dda93cSYan, Zheng ret = init_srcu_struct(&fs_info->subvol_srcu); 193676dda93cSYan, Zheng if (ret) { 193776dda93cSYan, Zheng err = ret; 193876dda93cSYan, Zheng goto fail; 193976dda93cSYan, Zheng } 194076dda93cSYan, Zheng 194176dda93cSYan, Zheng ret = setup_bdi(fs_info, &fs_info->bdi); 194276dda93cSYan, Zheng if (ret) { 194376dda93cSYan, Zheng err = ret; 194476dda93cSYan, Zheng goto fail_srcu; 194576dda93cSYan, Zheng } 194676dda93cSYan, Zheng 194776dda93cSYan, Zheng fs_info->btree_inode = new_inode(sb); 194876dda93cSYan, Zheng if (!fs_info->btree_inode) { 194976dda93cSYan, Zheng err = -ENOMEM; 195076dda93cSYan, Zheng goto fail_bdi; 195176dda93cSYan, Zheng } 195276dda93cSYan, Zheng 1953a6591715SChris Mason mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); 19541561dedaSMiao Xie 195576dda93cSYan, Zheng INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 19568fd17795SChris Mason INIT_LIST_HEAD(&fs_info->trans_list); 1957facda1e7SChris Mason INIT_LIST_HEAD(&fs_info->dead_roots); 195824bbcf04SYan, Zheng INIT_LIST_HEAD(&fs_info->delayed_iputs); 195919c00ddcSChris Mason INIT_LIST_HEAD(&fs_info->hashers); 1960ea8c2819SChris Mason INIT_LIST_HEAD(&fs_info->delalloc_inodes); 19615a3f23d5SChris Mason INIT_LIST_HEAD(&fs_info->ordered_operations); 196211833d66SYan Zheng INIT_LIST_HEAD(&fs_info->caching_block_groups); 19631832a6d5SChris Mason spin_lock_init(&fs_info->delalloc_lock); 1964a4abeea4SJosef Bacik spin_lock_init(&fs_info->trans_lock); 196531153d81SYan Zheng spin_lock_init(&fs_info->ref_cache_lock); 196676dda93cSYan, Zheng spin_lock_init(&fs_info->fs_roots_radix_lock); 196724bbcf04SYan, Zheng spin_lock_init(&fs_info->delayed_iput_lock); 19684cb5300bSChris Mason spin_lock_init(&fs_info->defrag_inodes_lock); 19692bf64758SJosef Bacik spin_lock_init(&fs_info->free_chunk_lock); 19707585717fSChris Mason mutex_init(&fs_info->reloc_mutex); 197119c00ddcSChris Mason 197258176a96SJosef Bacik init_completion(&fs_info->kobj_unregister); 19730b86a832SChris Mason INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); 19746324fbf3SChris Mason INIT_LIST_HEAD(&fs_info->space_info); 19750b86a832SChris Mason btrfs_mapping_init(&fs_info->mapping_tree); 1976f0486c68SYan, Zheng btrfs_init_block_rsv(&fs_info->global_block_rsv); 1977f0486c68SYan, Zheng btrfs_init_block_rsv(&fs_info->delalloc_block_rsv); 1978f0486c68SYan, Zheng btrfs_init_block_rsv(&fs_info->trans_block_rsv); 1979f0486c68SYan, Zheng btrfs_init_block_rsv(&fs_info->chunk_block_rsv); 1980f0486c68SYan, Zheng btrfs_init_block_rsv(&fs_info->empty_block_rsv); 19816d668ddaSJosef Bacik btrfs_init_block_rsv(&fs_info->delayed_block_rsv); 1982cb03c743SChris Mason atomic_set(&fs_info->nr_async_submits, 0); 1983771ed689SChris Mason atomic_set(&fs_info->async_delalloc_pages, 0); 19848c8bee1dSChris Mason atomic_set(&fs_info->async_submit_draining, 0); 19850986fe9eSChris Mason atomic_set(&fs_info->nr_async_bios, 0); 19864cb5300bSChris Mason atomic_set(&fs_info->defrag_running, 0); 1987e20d96d6SChris Mason fs_info->sb = sb; 19886f568d35SChris Mason fs_info->max_inline = 8192 * 1024; 19899ed74f2dSJosef Bacik fs_info->metadata_ratio = 0; 19904cb5300bSChris Mason fs_info->defrag_inodes = RB_ROOT; 1991a4abeea4SJosef Bacik fs_info->trans_no_join = 0; 19922bf64758SJosef Bacik fs_info->free_chunk_space = 0; 1993c8b97818SChris Mason 199490519d66SArne Jansen /* readahead state */ 199590519d66SArne Jansen INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT); 199690519d66SArne Jansen spin_lock_init(&fs_info->reada_lock); 19972c90e5d6SChris Mason 1998b34b086cSChris Mason fs_info->thread_pool_size = min_t(unsigned long, 1999b34b086cSChris Mason num_online_cpus() + 2, 8); 20000afbaf8cSChris Mason 20013eaa2885SChris Mason INIT_LIST_HEAD(&fs_info->ordered_extents); 20023eaa2885SChris Mason spin_lock_init(&fs_info->ordered_extent_lock); 200316cdcec7SMiao Xie fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), 200416cdcec7SMiao Xie GFP_NOFS); 200516cdcec7SMiao Xie if (!fs_info->delayed_root) { 200616cdcec7SMiao Xie err = -ENOMEM; 200716cdcec7SMiao Xie goto fail_iput; 200816cdcec7SMiao Xie } 200916cdcec7SMiao Xie btrfs_init_delayed_root(fs_info->delayed_root); 20103eaa2885SChris Mason 2011a2de733cSArne Jansen mutex_init(&fs_info->scrub_lock); 2012a2de733cSArne Jansen atomic_set(&fs_info->scrubs_running, 0); 2013a2de733cSArne Jansen atomic_set(&fs_info->scrub_pause_req, 0); 2014a2de733cSArne Jansen atomic_set(&fs_info->scrubs_paused, 0); 2015a2de733cSArne Jansen atomic_set(&fs_info->scrub_cancel_req, 0); 2016a2de733cSArne Jansen init_waitqueue_head(&fs_info->scrub_pause_wait); 2017a2de733cSArne Jansen init_rwsem(&fs_info->scrub_super_lock); 2018a2de733cSArne Jansen fs_info->scrub_workers_refcnt = 0; 201921adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 202021adbd5cSStefan Behrens fs_info->check_integrity_print_mask = 0; 202121adbd5cSStefan Behrens #endif 2022a2de733cSArne Jansen 2023c9e9f97bSIlya Dryomov spin_lock_init(&fs_info->balance_lock); 2024c9e9f97bSIlya Dryomov mutex_init(&fs_info->balance_mutex); 2025837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_running, 0); 2026837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_pause_req, 0); 2027a7e99c69SIlya Dryomov atomic_set(&fs_info->balance_cancel_req, 0); 2028c9e9f97bSIlya Dryomov fs_info->balance_ctl = NULL; 2029837d5b6eSIlya Dryomov init_waitqueue_head(&fs_info->balance_wait_q); 2030a061fc8dSChris Mason 20310afbaf8cSChris Mason sb->s_blocksize = 4096; 20320afbaf8cSChris Mason sb->s_blocksize_bits = blksize_bits(4096); 203332a88aa1SJens Axboe sb->s_bdi = &fs_info->bdi; 20340afbaf8cSChris Mason 203576dda93cSYan, Zheng fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; 2036bfe86848SMiklos Szeredi set_nlink(fs_info->btree_inode, 1); 20370afbaf8cSChris Mason /* 20380afbaf8cSChris Mason * we set the i_size on the btree inode to the max possible int. 20390afbaf8cSChris Mason * the real end of the address space is determined by all of 20400afbaf8cSChris Mason * the devices in the system 20410afbaf8cSChris Mason */ 20420afbaf8cSChris Mason fs_info->btree_inode->i_size = OFFSET_MAX; 2043d98237b3SChris Mason fs_info->btree_inode->i_mapping->a_ops = &btree_aops; 204404160088SChris Mason fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; 204504160088SChris Mason 20465d4f98a2SYan Zheng RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); 2047d1310b2eSChris Mason extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, 2048f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 2049a8067e02SDavid Sterba extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); 20500da5468fSChris Mason 2051d1310b2eSChris Mason BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; 2052d1310b2eSChris Mason 20530f7d52f4SChris Mason BTRFS_I(fs_info->btree_inode)->root = tree_root; 20540f7d52f4SChris Mason memset(&BTRFS_I(fs_info->btree_inode)->location, 0, 20550f7d52f4SChris Mason sizeof(struct btrfs_key)); 205676dda93cSYan, Zheng BTRFS_I(fs_info->btree_inode)->dummy_inode = 1; 205722b0ebdaSChris Mason insert_inode_hash(fs_info->btree_inode); 205839279cc3SChris Mason 2059e02119d5SChris Mason spin_lock_init(&fs_info->block_group_cache_lock); 20606bef4d31SEric Paris fs_info->block_group_cache_tree = RB_ROOT; 2061925baeddSChris Mason 206211833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[0], 2063f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 206411833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[1], 2065f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 206611833d66SYan Zheng fs_info->pinned_extents = &fs_info->freed_extents[0]; 2067e6dcd2dcSChris Mason fs_info->do_barriers = 1; 2068f9295749SChris Mason 2069d98237b3SChris Mason 20705a3f23d5SChris Mason mutex_init(&fs_info->ordered_operations_mutex); 207130ae8467SChris Mason mutex_init(&fs_info->tree_log_mutex); 2072925baeddSChris Mason mutex_init(&fs_info->chunk_mutex); 2073925baeddSChris Mason mutex_init(&fs_info->transaction_kthread_mutex); 2074a74a4b97SChris Mason mutex_init(&fs_info->cleaner_mutex); 2075a74a4b97SChris Mason mutex_init(&fs_info->volume_mutex); 2076276e680dSYan Zheng init_rwsem(&fs_info->extent_commit_sem); 2077c71bf099SYan, Zheng init_rwsem(&fs_info->cleanup_work_sem); 207876dda93cSYan, Zheng init_rwsem(&fs_info->subvol_sem); 2079fa9c0d79SChris Mason 2080fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); 2081fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->data_alloc_cluster); 2082fa9c0d79SChris Mason 20837d9eb12cSChris Mason init_waitqueue_head(&fs_info->transaction_throttle); 20843768f368SChris Mason init_waitqueue_head(&fs_info->transaction_wait); 2085bb9c12c9SSage Weil init_waitqueue_head(&fs_info->transaction_blocked_wait); 20864854ddd0SChris Mason init_waitqueue_head(&fs_info->async_submit_wait); 20879a8dd150SChris Mason 20880b86a832SChris Mason __setup_root(4096, 4096, 4096, 4096, tree_root, 20892c90e5d6SChris Mason fs_info, BTRFS_ROOT_TREE_OBJECTID); 20907eccb903SChris Mason 2091a512bbf8SYan Zheng bh = btrfs_read_dev_super(fs_devices->latest_bdev); 209220b45077SDave Young if (!bh) { 209320b45077SDave Young err = -EINVAL; 209416cdcec7SMiao Xie goto fail_alloc; 209520b45077SDave Young } 209639279cc3SChris Mason 20976c41761fSDavid Sterba memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); 20986c41761fSDavid Sterba memcpy(fs_info->super_for_commit, fs_info->super_copy, 20996c41761fSDavid Sterba sizeof(*fs_info->super_for_commit)); 2100a061fc8dSChris Mason brelse(bh); 21015f39d397SChris Mason 21026c41761fSDavid Sterba memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); 21030b86a832SChris Mason 21046c41761fSDavid Sterba disk_super = fs_info->super_copy; 21050f7d52f4SChris Mason if (!btrfs_super_root(disk_super)) 210616cdcec7SMiao Xie goto fail_alloc; 21070f7d52f4SChris Mason 2108acce952bSliubo /* check FS state, whether FS is broken. */ 2109acce952bSliubo fs_info->fs_state |= btrfs_super_flags(disk_super); 2110acce952bSliubo 2111acce952bSliubo btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); 2112acce952bSliubo 211375e7cb7fSLiu Bo /* 2114af31f5e5SChris Mason * run through our array of backup supers and setup 2115af31f5e5SChris Mason * our ring pointer to the oldest one 2116af31f5e5SChris Mason */ 2117af31f5e5SChris Mason generation = btrfs_super_generation(disk_super); 2118af31f5e5SChris Mason find_oldest_super_backup(fs_info, generation); 2119af31f5e5SChris Mason 2120af31f5e5SChris Mason /* 212175e7cb7fSLiu Bo * In the long term, we'll store the compression type in the super 212275e7cb7fSLiu Bo * block, and it'll be used for per file compression control. 212375e7cb7fSLiu Bo */ 212475e7cb7fSLiu Bo fs_info->compress_type = BTRFS_COMPRESS_ZLIB; 212575e7cb7fSLiu Bo 21262b82032cSYan Zheng ret = btrfs_parse_options(tree_root, options); 21272b82032cSYan Zheng if (ret) { 21282b82032cSYan Zheng err = ret; 212916cdcec7SMiao Xie goto fail_alloc; 21302b82032cSYan Zheng } 2131dfe25020SChris Mason 2132f2b636e8SJosef Bacik features = btrfs_super_incompat_flags(disk_super) & 2133f2b636e8SJosef Bacik ~BTRFS_FEATURE_INCOMPAT_SUPP; 2134f2b636e8SJosef Bacik if (features) { 2135f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount because of " 2136f2b636e8SJosef Bacik "unsupported optional features (%Lx).\n", 213721380931SJoel Becker (unsigned long long)features); 2138f2b636e8SJosef Bacik err = -EINVAL; 213916cdcec7SMiao Xie goto fail_alloc; 2140f2b636e8SJosef Bacik } 2141f2b636e8SJosef Bacik 21425d4f98a2SYan Zheng features = btrfs_super_incompat_flags(disk_super); 21435d4f98a2SYan Zheng features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; 2144a6fa6faeSLi Zefan if (tree_root->fs_info->compress_type & BTRFS_COMPRESS_LZO) 2145a6fa6faeSLi Zefan features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; 21465d4f98a2SYan Zheng btrfs_set_super_incompat_flags(disk_super, features); 21475d4f98a2SYan Zheng 2148f2b636e8SJosef Bacik features = btrfs_super_compat_ro_flags(disk_super) & 2149f2b636e8SJosef Bacik ~BTRFS_FEATURE_COMPAT_RO_SUPP; 2150f2b636e8SJosef Bacik if (!(sb->s_flags & MS_RDONLY) && features) { 2151f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount RDWR because of " 2152f2b636e8SJosef Bacik "unsupported option features (%Lx).\n", 215321380931SJoel Becker (unsigned long long)features); 2154f2b636e8SJosef Bacik err = -EINVAL; 215516cdcec7SMiao Xie goto fail_alloc; 2156f2b636e8SJosef Bacik } 215761d92c32SChris Mason 215861d92c32SChris Mason btrfs_init_workers(&fs_info->generic_worker, 215961d92c32SChris Mason "genwork", 1, NULL); 216061d92c32SChris Mason 21615443be45SChris Mason btrfs_init_workers(&fs_info->workers, "worker", 216261d92c32SChris Mason fs_info->thread_pool_size, 216361d92c32SChris Mason &fs_info->generic_worker); 2164c8b97818SChris Mason 2165771ed689SChris Mason btrfs_init_workers(&fs_info->delalloc_workers, "delalloc", 216661d92c32SChris Mason fs_info->thread_pool_size, 216761d92c32SChris Mason &fs_info->generic_worker); 2168771ed689SChris Mason 21695443be45SChris Mason btrfs_init_workers(&fs_info->submit_workers, "submit", 2170b720d209SChris Mason min_t(u64, fs_devices->num_devices, 217161d92c32SChris Mason fs_info->thread_pool_size), 217261d92c32SChris Mason &fs_info->generic_worker); 217361b49440SChris Mason 2174bab39bf9SJosef Bacik btrfs_init_workers(&fs_info->caching_workers, "cache", 2175bab39bf9SJosef Bacik 2, &fs_info->generic_worker); 2176bab39bf9SJosef Bacik 217761b49440SChris Mason /* a higher idle thresh on the submit workers makes it much more 217861b49440SChris Mason * likely that bios will be send down in a sane order to the 217961b49440SChris Mason * devices 218061b49440SChris Mason */ 218161b49440SChris Mason fs_info->submit_workers.idle_thresh = 64; 218253863232SChris Mason 2183771ed689SChris Mason fs_info->workers.idle_thresh = 16; 21844a69a410SChris Mason fs_info->workers.ordered = 1; 218561b49440SChris Mason 2186771ed689SChris Mason fs_info->delalloc_workers.idle_thresh = 2; 2187771ed689SChris Mason fs_info->delalloc_workers.ordered = 1; 2188771ed689SChris Mason 218961d92c32SChris Mason btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1, 219061d92c32SChris Mason &fs_info->generic_worker); 21915443be45SChris Mason btrfs_init_workers(&fs_info->endio_workers, "endio", 219261d92c32SChris Mason fs_info->thread_pool_size, 219361d92c32SChris Mason &fs_info->generic_worker); 2194d20f7043SChris Mason btrfs_init_workers(&fs_info->endio_meta_workers, "endio-meta", 219561d92c32SChris Mason fs_info->thread_pool_size, 219661d92c32SChris Mason &fs_info->generic_worker); 2197cad321adSChris Mason btrfs_init_workers(&fs_info->endio_meta_write_workers, 219861d92c32SChris Mason "endio-meta-write", fs_info->thread_pool_size, 219961d92c32SChris Mason &fs_info->generic_worker); 22005443be45SChris Mason btrfs_init_workers(&fs_info->endio_write_workers, "endio-write", 220161d92c32SChris Mason fs_info->thread_pool_size, 220261d92c32SChris Mason &fs_info->generic_worker); 22030cb59c99SJosef Bacik btrfs_init_workers(&fs_info->endio_freespace_worker, "freespace-write", 22040cb59c99SJosef Bacik 1, &fs_info->generic_worker); 220516cdcec7SMiao Xie btrfs_init_workers(&fs_info->delayed_workers, "delayed-meta", 220616cdcec7SMiao Xie fs_info->thread_pool_size, 220716cdcec7SMiao Xie &fs_info->generic_worker); 220890519d66SArne Jansen btrfs_init_workers(&fs_info->readahead_workers, "readahead", 220990519d66SArne Jansen fs_info->thread_pool_size, 221090519d66SArne Jansen &fs_info->generic_worker); 221161b49440SChris Mason 221261b49440SChris Mason /* 221361b49440SChris Mason * endios are largely parallel and should have a very 221461b49440SChris Mason * low idle thresh 221561b49440SChris Mason */ 221661b49440SChris Mason fs_info->endio_workers.idle_thresh = 4; 2217b51912c9SChris Mason fs_info->endio_meta_workers.idle_thresh = 4; 2218b51912c9SChris Mason 22199042846bSChris Mason fs_info->endio_write_workers.idle_thresh = 2; 22209042846bSChris Mason fs_info->endio_meta_write_workers.idle_thresh = 2; 222190519d66SArne Jansen fs_info->readahead_workers.idle_thresh = 2; 22229042846bSChris Mason 22230dc3b84aSJosef Bacik /* 22240dc3b84aSJosef Bacik * btrfs_start_workers can really only fail because of ENOMEM so just 22250dc3b84aSJosef Bacik * return -ENOMEM if any of these fail. 22260dc3b84aSJosef Bacik */ 22270dc3b84aSJosef Bacik ret = btrfs_start_workers(&fs_info->workers); 22280dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->generic_worker); 22290dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->submit_workers); 22300dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delalloc_workers); 22310dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->fixup_workers); 22320dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_workers); 22330dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_workers); 22340dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_write_workers); 22350dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_write_workers); 22360dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_freespace_worker); 22370dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delayed_workers); 22380dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->caching_workers); 22390dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->readahead_workers); 22400dc3b84aSJosef Bacik if (ret) { 22410dc3b84aSJosef Bacik ret = -ENOMEM; 22420dc3b84aSJosef Bacik goto fail_sb_buffer; 22430dc3b84aSJosef Bacik } 22444543df7eSChris Mason 22454575c9ccSChris Mason fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); 2246c8b97818SChris Mason fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, 2247c8b97818SChris Mason 4 * 1024 * 1024 / PAGE_CACHE_SIZE); 22484575c9ccSChris Mason 2249db94535dSChris Mason nodesize = btrfs_super_nodesize(disk_super); 2250db94535dSChris Mason leafsize = btrfs_super_leafsize(disk_super); 2251db94535dSChris Mason sectorsize = btrfs_super_sectorsize(disk_super); 225287ee04ebSChris Mason stripesize = btrfs_super_stripesize(disk_super); 2253db94535dSChris Mason tree_root->nodesize = nodesize; 2254db94535dSChris Mason tree_root->leafsize = leafsize; 2255db94535dSChris Mason tree_root->sectorsize = sectorsize; 225687ee04ebSChris Mason tree_root->stripesize = stripesize; 2257a061fc8dSChris Mason 2258a061fc8dSChris Mason sb->s_blocksize = sectorsize; 2259a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(sectorsize); 2260db94535dSChris Mason 226139279cc3SChris Mason if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC, 226239279cc3SChris Mason sizeof(disk_super->magic))) { 2263d397712bSChris Mason printk(KERN_INFO "btrfs: valid FS not found on %s\n", sb->s_id); 226439279cc3SChris Mason goto fail_sb_buffer; 226539279cc3SChris Mason } 226619c00ddcSChris Mason 2267941b2ddfSKeith Mannthey if (sectorsize < PAGE_SIZE) { 2268941b2ddfSKeith Mannthey printk(KERN_WARNING "btrfs: Incompatible sector size " 2269941b2ddfSKeith Mannthey "found on %s\n", sb->s_id); 2270941b2ddfSKeith Mannthey goto fail_sb_buffer; 2271941b2ddfSKeith Mannthey } 2272941b2ddfSKeith Mannthey 2273925baeddSChris Mason mutex_lock(&fs_info->chunk_mutex); 2274e4404d6eSYan Zheng ret = btrfs_read_sys_array(tree_root); 2275925baeddSChris Mason mutex_unlock(&fs_info->chunk_mutex); 227684eed90fSChris Mason if (ret) { 2277d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read the system " 2278d397712bSChris Mason "array on %s\n", sb->s_id); 22795d4f98a2SYan Zheng goto fail_sb_buffer; 228084eed90fSChris Mason } 22810b86a832SChris Mason 22820b86a832SChris Mason blocksize = btrfs_level_size(tree_root, 22830b86a832SChris Mason btrfs_super_chunk_root_level(disk_super)); 228484234f3aSYan Zheng generation = btrfs_super_chunk_root_generation(disk_super); 22850b86a832SChris Mason 22860b86a832SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 22870b86a832SChris Mason chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); 22880b86a832SChris Mason 22890b86a832SChris Mason chunk_root->node = read_tree_block(chunk_root, 22900b86a832SChris Mason btrfs_super_chunk_root(disk_super), 229184234f3aSYan Zheng blocksize, generation); 22920b86a832SChris Mason BUG_ON(!chunk_root->node); 229383121942SDavid Woodhouse if (!test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { 229483121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n", 229583121942SDavid Woodhouse sb->s_id); 2296af31f5e5SChris Mason goto fail_tree_roots; 229783121942SDavid Woodhouse } 22985d4f98a2SYan Zheng btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); 22995d4f98a2SYan Zheng chunk_root->commit_root = btrfs_root_node(chunk_root); 23000b86a832SChris Mason 2301e17cade2SChris Mason read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, 2302e17cade2SChris Mason (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node), 2303e17cade2SChris Mason BTRFS_UUID_SIZE); 2304e17cade2SChris Mason 23050b86a832SChris Mason ret = btrfs_read_chunk_tree(chunk_root); 23062b82032cSYan Zheng if (ret) { 2307d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read chunk tree on %s\n", 2308d397712bSChris Mason sb->s_id); 2309af31f5e5SChris Mason goto fail_tree_roots; 23102b82032cSYan Zheng } 23110b86a832SChris Mason 2312dfe25020SChris Mason btrfs_close_extra_devices(fs_devices); 2313dfe25020SChris Mason 2314a6b0d5c8SChris Mason if (!fs_devices->latest_bdev) { 2315a6b0d5c8SChris Mason printk(KERN_CRIT "btrfs: failed to read devices on %s\n", 2316a6b0d5c8SChris Mason sb->s_id); 2317a6b0d5c8SChris Mason goto fail_tree_roots; 2318a6b0d5c8SChris Mason } 2319a6b0d5c8SChris Mason 2320af31f5e5SChris Mason retry_root_backup: 2321db94535dSChris Mason blocksize = btrfs_level_size(tree_root, 2322db94535dSChris Mason btrfs_super_root_level(disk_super)); 232384234f3aSYan Zheng generation = btrfs_super_generation(disk_super); 23240b86a832SChris Mason 2325e20d96d6SChris Mason tree_root->node = read_tree_block(tree_root, 2326db94535dSChris Mason btrfs_super_root(disk_super), 232784234f3aSYan Zheng blocksize, generation); 2328af31f5e5SChris Mason if (!tree_root->node || 2329af31f5e5SChris Mason !test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) { 233083121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read tree root on %s\n", 233183121942SDavid Woodhouse sb->s_id); 2332af31f5e5SChris Mason 2333af31f5e5SChris Mason goto recovery_tree_root; 233483121942SDavid Woodhouse } 2335af31f5e5SChris Mason 23365d4f98a2SYan Zheng btrfs_set_root_node(&tree_root->root_item, tree_root->node); 23375d4f98a2SYan Zheng tree_root->commit_root = btrfs_root_node(tree_root); 2338db94535dSChris Mason 2339db94535dSChris Mason ret = find_and_setup_root(tree_root, fs_info, 2340e20d96d6SChris Mason BTRFS_EXTENT_TREE_OBJECTID, extent_root); 23410b86a832SChris Mason if (ret) 2342af31f5e5SChris Mason goto recovery_tree_root; 23430b86a832SChris Mason extent_root->track_dirty = 1; 23440b86a832SChris Mason 23450b86a832SChris Mason ret = find_and_setup_root(tree_root, fs_info, 23460b86a832SChris Mason BTRFS_DEV_TREE_OBJECTID, dev_root); 23470b86a832SChris Mason if (ret) 2348af31f5e5SChris Mason goto recovery_tree_root; 23495d4f98a2SYan Zheng dev_root->track_dirty = 1; 23503768f368SChris Mason 2351d20f7043SChris Mason ret = find_and_setup_root(tree_root, fs_info, 2352d20f7043SChris Mason BTRFS_CSUM_TREE_OBJECTID, csum_root); 2353d20f7043SChris Mason if (ret) 2354af31f5e5SChris Mason goto recovery_tree_root; 2355d20f7043SChris Mason 2356d20f7043SChris Mason csum_root->track_dirty = 1; 2357d20f7043SChris Mason 23588929ecfaSYan, Zheng fs_info->generation = generation; 23598929ecfaSYan, Zheng fs_info->last_trans_committed = generation; 23608929ecfaSYan, Zheng 2361c59021f8Sliubo ret = btrfs_init_space_info(fs_info); 2362c59021f8Sliubo if (ret) { 2363c59021f8Sliubo printk(KERN_ERR "Failed to initial space info: %d\n", ret); 2364c59021f8Sliubo goto fail_block_groups; 2365c59021f8Sliubo } 2366c59021f8Sliubo 23671b1d1f66SJosef Bacik ret = btrfs_read_block_groups(extent_root); 23681b1d1f66SJosef Bacik if (ret) { 23691b1d1f66SJosef Bacik printk(KERN_ERR "Failed to read block groups: %d\n", ret); 23701b1d1f66SJosef Bacik goto fail_block_groups; 23711b1d1f66SJosef Bacik } 23729078a3e1SChris Mason 2373a74a4b97SChris Mason fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 2374a74a4b97SChris Mason "btrfs-cleaner"); 237557506d50SQinghuang Feng if (IS_ERR(fs_info->cleaner_kthread)) 23761b1d1f66SJosef Bacik goto fail_block_groups; 2377a74a4b97SChris Mason 2378a74a4b97SChris Mason fs_info->transaction_kthread = kthread_run(transaction_kthread, 2379a74a4b97SChris Mason tree_root, 2380a74a4b97SChris Mason "btrfs-transaction"); 238157506d50SQinghuang Feng if (IS_ERR(fs_info->transaction_kthread)) 23823f157a2fSChris Mason goto fail_cleaner; 2383a74a4b97SChris Mason 2384c289811cSChris Mason if (!btrfs_test_opt(tree_root, SSD) && 2385c289811cSChris Mason !btrfs_test_opt(tree_root, NOSSD) && 2386c289811cSChris Mason !fs_info->fs_devices->rotating) { 2387c289811cSChris Mason printk(KERN_INFO "Btrfs detected SSD devices, enabling SSD " 2388c289811cSChris Mason "mode\n"); 2389c289811cSChris Mason btrfs_set_opt(fs_info->mount_opt, SSD); 2390c289811cSChris Mason } 2391c289811cSChris Mason 239221adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 239321adbd5cSStefan Behrens if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { 239421adbd5cSStefan Behrens ret = btrfsic_mount(tree_root, fs_devices, 239521adbd5cSStefan Behrens btrfs_test_opt(tree_root, 239621adbd5cSStefan Behrens CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? 239721adbd5cSStefan Behrens 1 : 0, 239821adbd5cSStefan Behrens fs_info->check_integrity_print_mask); 239921adbd5cSStefan Behrens if (ret) 240021adbd5cSStefan Behrens printk(KERN_WARNING "btrfs: failed to initialize" 240121adbd5cSStefan Behrens " integrity check module %s\n", sb->s_id); 240221adbd5cSStefan Behrens } 240321adbd5cSStefan Behrens #endif 240421adbd5cSStefan Behrens 2405acce952bSliubo /* do not make disk changes in broken FS */ 2406acce952bSliubo if (btrfs_super_log_root(disk_super) != 0 && 2407acce952bSliubo !(fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR)) { 2408e02119d5SChris Mason u64 bytenr = btrfs_super_log_root(disk_super); 2409d18a2c44SChris Mason 24107c2ca468SChris Mason if (fs_devices->rw_devices == 0) { 2411d397712bSChris Mason printk(KERN_WARNING "Btrfs log replay required " 2412d397712bSChris Mason "on RO media\n"); 24137c2ca468SChris Mason err = -EIO; 24147c2ca468SChris Mason goto fail_trans_kthread; 24157c2ca468SChris Mason } 2416e02119d5SChris Mason blocksize = 2417e02119d5SChris Mason btrfs_level_size(tree_root, 2418e02119d5SChris Mason btrfs_super_log_root_level(disk_super)); 2419e02119d5SChris Mason 24206f07e42eSAl Viro log_tree_root = btrfs_alloc_root(fs_info); 2421676e4c86SDan Carpenter if (!log_tree_root) { 2422676e4c86SDan Carpenter err = -ENOMEM; 2423676e4c86SDan Carpenter goto fail_trans_kthread; 2424676e4c86SDan Carpenter } 2425e02119d5SChris Mason 2426e02119d5SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 2427e02119d5SChris Mason log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); 2428e02119d5SChris Mason 2429e02119d5SChris Mason log_tree_root->node = read_tree_block(tree_root, bytenr, 243084234f3aSYan Zheng blocksize, 243184234f3aSYan Zheng generation + 1); 2432e02119d5SChris Mason ret = btrfs_recover_log_trees(log_tree_root); 2433e02119d5SChris Mason BUG_ON(ret); 2434e556ce2cSYan Zheng 2435e556ce2cSYan Zheng if (sb->s_flags & MS_RDONLY) { 2436e556ce2cSYan Zheng ret = btrfs_commit_super(tree_root); 2437e556ce2cSYan Zheng BUG_ON(ret); 2438e556ce2cSYan Zheng } 2439e02119d5SChris Mason } 24401a40e23bSZheng Yan 244176dda93cSYan, Zheng ret = btrfs_find_orphan_roots(tree_root); 244276dda93cSYan, Zheng BUG_ON(ret); 244376dda93cSYan, Zheng 24447c2ca468SChris Mason if (!(sb->s_flags & MS_RDONLY)) { 2445d68fc57bSYan, Zheng ret = btrfs_cleanup_fs_roots(fs_info); 2446d68fc57bSYan, Zheng BUG_ON(ret); 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); 2866a236aed1SChris Mason BUG(); 2867a236aed1SChris Mason } 2868f2984462SChris Mason 2869a512bbf8SYan Zheng total_errors = 0; 28701f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 2871dfe25020SChris Mason if (!dev->bdev) 2872dfe25020SChris Mason continue; 28732b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 2874dfe25020SChris Mason continue; 2875dfe25020SChris Mason 2876a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); 2877a512bbf8SYan Zheng if (ret) 28781259ab75SChris Mason total_errors++; 2879f2984462SChris Mason } 2880174ba509SChris Mason mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 2881a236aed1SChris Mason if (total_errors > max_errors) { 2882d397712bSChris Mason printk(KERN_ERR "btrfs: %d errors while writing supers\n", 2883d397712bSChris Mason total_errors); 2884a236aed1SChris Mason BUG(); 2885a236aed1SChris Mason } 2886f2984462SChris Mason return 0; 2887f2984462SChris Mason } 2888f2984462SChris Mason 2889a512bbf8SYan Zheng int write_ctree_super(struct btrfs_trans_handle *trans, 2890a512bbf8SYan Zheng struct btrfs_root *root, int max_mirrors) 2891cfaa7295SChris Mason { 2892e66f709bSChris Mason int ret; 28932c90e5d6SChris Mason 2894a512bbf8SYan Zheng ret = write_all_supers(root, max_mirrors); 28955f39d397SChris Mason return ret; 2896cfaa7295SChris Mason } 2897cfaa7295SChris Mason 289849b25e05SJeff Mahoney /* Kill all outstanding I/O */ 289949b25e05SJeff Mahoney void btrfs_abort_devices(struct btrfs_root *root) 290049b25e05SJeff Mahoney { 290149b25e05SJeff Mahoney struct list_head *head; 290249b25e05SJeff Mahoney struct btrfs_device *dev; 290349b25e05SJeff Mahoney mutex_lock(&root->fs_info->fs_devices->device_list_mutex); 290449b25e05SJeff Mahoney head = &root->fs_info->fs_devices->devices; 290549b25e05SJeff Mahoney list_for_each_entry_rcu(dev, head, dev_list) { 290649b25e05SJeff Mahoney blk_abort_queue(dev->bdev->bd_disk->queue); 290749b25e05SJeff Mahoney } 290849b25e05SJeff Mahoney mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 290949b25e05SJeff Mahoney } 291049b25e05SJeff Mahoney 2911143bede5SJeff Mahoney void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) 29122619ba1fSChris Mason { 29134df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 29142619ba1fSChris Mason radix_tree_delete(&fs_info->fs_roots_radix, 29152619ba1fSChris Mason (unsigned long)root->root_key.objectid); 29164df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 291776dda93cSYan, Zheng 291876dda93cSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) 291976dda93cSYan, Zheng synchronize_srcu(&fs_info->subvol_srcu); 292076dda93cSYan, Zheng 2921581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_pinned); 2922581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_ctl); 29234df27c4dSYan, Zheng free_fs_root(root); 29244df27c4dSYan, Zheng } 29254df27c4dSYan, Zheng 29264df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root) 29274df27c4dSYan, Zheng { 292882d5902dSLi Zefan iput(root->cache_inode); 29294df27c4dSYan, Zheng WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); 29300ee5dc67SAl Viro if (root->anon_dev) 29310ee5dc67SAl Viro free_anon_bdev(root->anon_dev); 29325f39d397SChris Mason free_extent_buffer(root->node); 29335f39d397SChris Mason free_extent_buffer(root->commit_root); 2934581bb050SLi Zefan kfree(root->free_ino_ctl); 2935581bb050SLi Zefan kfree(root->free_ino_pinned); 293658176a96SJosef Bacik kfree(root->name); 29372619ba1fSChris Mason kfree(root); 29382619ba1fSChris Mason } 29392619ba1fSChris Mason 2940143bede5SJeff Mahoney static void del_fs_roots(struct btrfs_fs_info *fs_info) 29410f7d52f4SChris Mason { 29420f7d52f4SChris Mason int ret; 29430f7d52f4SChris Mason struct btrfs_root *gang[8]; 29440f7d52f4SChris Mason int i; 29450f7d52f4SChris Mason 294676dda93cSYan, Zheng while (!list_empty(&fs_info->dead_roots)) { 294776dda93cSYan, Zheng gang[0] = list_entry(fs_info->dead_roots.next, 294876dda93cSYan, Zheng struct btrfs_root, root_list); 294976dda93cSYan, Zheng list_del(&gang[0]->root_list); 295076dda93cSYan, Zheng 295176dda93cSYan, Zheng if (gang[0]->in_radix) { 295276dda93cSYan, Zheng btrfs_free_fs_root(fs_info, gang[0]); 295376dda93cSYan, Zheng } else { 295476dda93cSYan, Zheng free_extent_buffer(gang[0]->node); 295576dda93cSYan, Zheng free_extent_buffer(gang[0]->commit_root); 295676dda93cSYan, Zheng kfree(gang[0]); 295776dda93cSYan, Zheng } 295876dda93cSYan, Zheng } 295976dda93cSYan, Zheng 29600f7d52f4SChris Mason while (1) { 29610f7d52f4SChris Mason ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 29620f7d52f4SChris Mason (void **)gang, 0, 29630f7d52f4SChris Mason ARRAY_SIZE(gang)); 29640f7d52f4SChris Mason if (!ret) 29650f7d52f4SChris Mason break; 29662619ba1fSChris Mason for (i = 0; i < ret; i++) 29675eda7b5eSChris Mason btrfs_free_fs_root(fs_info, gang[i]); 29680f7d52f4SChris Mason } 29690f7d52f4SChris Mason } 2970b4100d64SChris Mason 2971c146afadSYan Zheng int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) 2972c146afadSYan Zheng { 2973c146afadSYan Zheng u64 root_objectid = 0; 2974c146afadSYan Zheng struct btrfs_root *gang[8]; 2975c146afadSYan Zheng int i; 2976c146afadSYan Zheng int ret; 2977c146afadSYan Zheng 2978c146afadSYan Zheng while (1) { 2979c146afadSYan Zheng ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 2980c146afadSYan Zheng (void **)gang, root_objectid, 2981c146afadSYan Zheng ARRAY_SIZE(gang)); 2982c146afadSYan Zheng if (!ret) 2983c146afadSYan Zheng break; 29845d4f98a2SYan Zheng 29855d4f98a2SYan Zheng root_objectid = gang[ret - 1]->root_key.objectid + 1; 2986c146afadSYan Zheng for (i = 0; i < ret; i++) { 298766b4ffd1SJosef Bacik int err; 298866b4ffd1SJosef Bacik 2989c146afadSYan Zheng root_objectid = gang[i]->root_key.objectid; 299066b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(gang[i]); 299166b4ffd1SJosef Bacik if (err) 299266b4ffd1SJosef Bacik return err; 2993c146afadSYan Zheng } 2994c146afadSYan Zheng root_objectid++; 2995c146afadSYan Zheng } 2996c146afadSYan Zheng return 0; 2997c146afadSYan Zheng } 2998c146afadSYan Zheng 2999c146afadSYan Zheng int btrfs_commit_super(struct btrfs_root *root) 3000c146afadSYan Zheng { 3001c146afadSYan Zheng struct btrfs_trans_handle *trans; 3002c146afadSYan Zheng int ret; 3003c146afadSYan Zheng 3004c146afadSYan Zheng mutex_lock(&root->fs_info->cleaner_mutex); 300524bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 3006c146afadSYan Zheng btrfs_clean_old_snapshots(root); 3007c146afadSYan Zheng mutex_unlock(&root->fs_info->cleaner_mutex); 3008c71bf099SYan, Zheng 3009c71bf099SYan, Zheng /* wait until ongoing cleanup work done */ 3010c71bf099SYan, Zheng down_write(&root->fs_info->cleanup_work_sem); 3011c71bf099SYan, Zheng up_write(&root->fs_info->cleanup_work_sem); 3012c71bf099SYan, Zheng 30137a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 30143612b495STsutomu Itoh if (IS_ERR(trans)) 30153612b495STsutomu Itoh return PTR_ERR(trans); 3016c146afadSYan Zheng ret = btrfs_commit_transaction(trans, root); 3017c146afadSYan Zheng BUG_ON(ret); 3018c146afadSYan Zheng /* run commit again to drop the original snapshot */ 30197a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 30203612b495STsutomu Itoh if (IS_ERR(trans)) 30213612b495STsutomu Itoh return PTR_ERR(trans); 3022c146afadSYan Zheng btrfs_commit_transaction(trans, root); 3023c146afadSYan Zheng ret = btrfs_write_and_wait_transaction(NULL, root); 3024c146afadSYan Zheng BUG_ON(ret); 3025c146afadSYan Zheng 3026a512bbf8SYan Zheng ret = write_ctree_super(NULL, root, 0); 3027c146afadSYan Zheng return ret; 3028c146afadSYan Zheng } 3029c146afadSYan Zheng 3030e20d96d6SChris Mason int close_ctree(struct btrfs_root *root) 3031eb60ceacSChris Mason { 30320f7d52f4SChris Mason struct btrfs_fs_info *fs_info = root->fs_info; 3033c146afadSYan Zheng int ret; 3034e089f05cSChris Mason 3035facda1e7SChris Mason fs_info->closing = 1; 3036a2135011SChris Mason smp_mb(); 3037a2135011SChris Mason 3038837d5b6eSIlya Dryomov /* pause restriper - we want to resume on mount */ 3039837d5b6eSIlya Dryomov btrfs_pause_balance(root->fs_info); 3040837d5b6eSIlya Dryomov 3041a2de733cSArne Jansen btrfs_scrub_cancel(root); 30424cb5300bSChris Mason 30434cb5300bSChris Mason /* wait for any defraggers to finish */ 30444cb5300bSChris Mason wait_event(fs_info->transaction_wait, 30454cb5300bSChris Mason (atomic_read(&fs_info->defrag_running) == 0)); 30464cb5300bSChris Mason 30474cb5300bSChris Mason /* clear out the rbtree of defraggable inodes */ 3048e3029d9fSAl Viro btrfs_run_defrag_inodes(fs_info); 30494cb5300bSChris Mason 3050acce952bSliubo /* 3051acce952bSliubo * Here come 2 situations when btrfs is broken to flip readonly: 3052acce952bSliubo * 3053acce952bSliubo * 1. when btrfs flips readonly somewhere else before 3054acce952bSliubo * btrfs_commit_super, sb->s_flags has MS_RDONLY flag, 3055acce952bSliubo * and btrfs will skip to write sb directly to keep 3056acce952bSliubo * ERROR state on disk. 3057acce952bSliubo * 3058acce952bSliubo * 2. when btrfs flips readonly just in btrfs_commit_super, 3059ae0e47f0SJustin P. Mattock * and in such case, btrfs cannot write sb via btrfs_commit_super, 3060acce952bSliubo * and since fs_state has been set BTRFS_SUPER_FLAG_ERROR flag, 3061acce952bSliubo * btrfs will cleanup all FS resources first and write sb then. 3062acce952bSliubo */ 3063c146afadSYan Zheng if (!(fs_info->sb->s_flags & MS_RDONLY)) { 3064c146afadSYan Zheng ret = btrfs_commit_super(root); 3065d397712bSChris Mason if (ret) 3066d397712bSChris Mason printk(KERN_ERR "btrfs: commit super ret %d\n", ret); 3067c146afadSYan Zheng } 3068ed2ff2cbSChris Mason 3069acce952bSliubo if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { 3070acce952bSliubo ret = btrfs_error_commit_super(root); 3071acce952bSliubo if (ret) 3072acce952bSliubo printk(KERN_ERR "btrfs: commit super ret %d\n", ret); 3073acce952bSliubo } 3074acce952bSliubo 3075300e4f8aSJosef Bacik btrfs_put_block_group_cache(fs_info); 3076300e4f8aSJosef Bacik 3077e3029d9fSAl Viro kthread_stop(fs_info->transaction_kthread); 3078e3029d9fSAl Viro kthread_stop(fs_info->cleaner_kthread); 30798929ecfaSYan, Zheng 3080f25784b3SYan Zheng fs_info->closing = 2; 3081f25784b3SYan Zheng smp_mb(); 3082f25784b3SYan Zheng 3083b0c68f8bSChris Mason if (fs_info->delalloc_bytes) { 3084d397712bSChris Mason printk(KERN_INFO "btrfs: at unmount delalloc count %llu\n", 308521380931SJoel Becker (unsigned long long)fs_info->delalloc_bytes); 3086b0c68f8bSChris Mason } 308731153d81SYan Zheng if (fs_info->total_ref_cache_size) { 3088d397712bSChris Mason printk(KERN_INFO "btrfs: at umount reference cache size %llu\n", 3089d397712bSChris Mason (unsigned long long)fs_info->total_ref_cache_size); 309031153d81SYan Zheng } 309131153d81SYan Zheng 30925f39d397SChris Mason free_extent_buffer(fs_info->extent_root->node); 30935d4f98a2SYan Zheng free_extent_buffer(fs_info->extent_root->commit_root); 30945f39d397SChris Mason free_extent_buffer(fs_info->tree_root->node); 30955d4f98a2SYan Zheng free_extent_buffer(fs_info->tree_root->commit_root); 3096e3029d9fSAl Viro free_extent_buffer(fs_info->chunk_root->node); 3097e3029d9fSAl Viro free_extent_buffer(fs_info->chunk_root->commit_root); 3098e3029d9fSAl Viro free_extent_buffer(fs_info->dev_root->node); 3099e3029d9fSAl Viro free_extent_buffer(fs_info->dev_root->commit_root); 3100e3029d9fSAl Viro free_extent_buffer(fs_info->csum_root->node); 3101e3029d9fSAl Viro free_extent_buffer(fs_info->csum_root->commit_root); 3102d20f7043SChris Mason 3103e3029d9fSAl Viro btrfs_free_block_groups(fs_info); 3104c146afadSYan Zheng 31050f7d52f4SChris Mason del_fs_roots(fs_info); 3106d10c5f31SChris Mason 3107c146afadSYan Zheng iput(fs_info->btree_inode); 31089ad6b7bcSChris Mason 310961d92c32SChris Mason btrfs_stop_workers(&fs_info->generic_worker); 3110247e743cSChris Mason btrfs_stop_workers(&fs_info->fixup_workers); 3111771ed689SChris Mason btrfs_stop_workers(&fs_info->delalloc_workers); 31128b712842SChris Mason btrfs_stop_workers(&fs_info->workers); 31138b712842SChris Mason btrfs_stop_workers(&fs_info->endio_workers); 3114d20f7043SChris Mason btrfs_stop_workers(&fs_info->endio_meta_workers); 3115cad321adSChris Mason btrfs_stop_workers(&fs_info->endio_meta_write_workers); 3116e6dcd2dcSChris Mason btrfs_stop_workers(&fs_info->endio_write_workers); 31170cb59c99SJosef Bacik btrfs_stop_workers(&fs_info->endio_freespace_worker); 31181cc127b5SChris Mason btrfs_stop_workers(&fs_info->submit_workers); 311916cdcec7SMiao Xie btrfs_stop_workers(&fs_info->delayed_workers); 3120bab39bf9SJosef Bacik btrfs_stop_workers(&fs_info->caching_workers); 312190519d66SArne Jansen btrfs_stop_workers(&fs_info->readahead_workers); 3122d6bfde87SChris Mason 312321adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 312421adbd5cSStefan Behrens if (btrfs_test_opt(root, CHECK_INTEGRITY)) 312521adbd5cSStefan Behrens btrfsic_unmount(root, fs_info->fs_devices); 312621adbd5cSStefan Behrens #endif 312721adbd5cSStefan Behrens 3128dfe25020SChris Mason btrfs_close_devices(fs_info->fs_devices); 31290b86a832SChris Mason btrfs_mapping_tree_free(&fs_info->mapping_tree); 3130b248a415SChris Mason 313104160088SChris Mason bdi_destroy(&fs_info->bdi); 313276dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 31330b86a832SChris Mason 3134eb60ceacSChris Mason return 0; 3135eb60ceacSChris Mason } 3136eb60ceacSChris Mason 31371259ab75SChris Mason int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid) 3138ccd467d6SChris Mason { 31391259ab75SChris Mason int ret; 3140810191ffSChris Mason struct inode *btree_inode = buf->first_page->mapping->host; 31411259ab75SChris Mason 31422ac55d41SJosef Bacik ret = extent_buffer_uptodate(&BTRFS_I(btree_inode)->io_tree, buf, 31432ac55d41SJosef Bacik NULL); 31441259ab75SChris Mason if (!ret) 31451259ab75SChris Mason return ret; 31461259ab75SChris Mason 31471259ab75SChris Mason ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, 31481259ab75SChris Mason parent_transid); 31491259ab75SChris Mason return !ret; 31505f39d397SChris Mason } 31516702ed49SChris Mason 31525f39d397SChris Mason int btrfs_set_buffer_uptodate(struct extent_buffer *buf) 31535f39d397SChris Mason { 3154810191ffSChris Mason struct inode *btree_inode = buf->first_page->mapping->host; 3155d1310b2eSChris Mason return set_extent_buffer_uptodate(&BTRFS_I(btree_inode)->io_tree, 31565f39d397SChris Mason buf); 31575f39d397SChris Mason } 31585f39d397SChris Mason 31595f39d397SChris Mason void btrfs_mark_buffer_dirty(struct extent_buffer *buf) 31605f39d397SChris Mason { 3161810191ffSChris Mason struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; 31625f39d397SChris Mason u64 transid = btrfs_header_generation(buf); 31635f39d397SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 3164b9473439SChris Mason int was_dirty; 3165b4ce94deSChris Mason 3166b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 3167ccd467d6SChris Mason if (transid != root->fs_info->generation) { 3168d397712bSChris Mason printk(KERN_CRIT "btrfs transid mismatch buffer %llu, " 3169d397712bSChris Mason "found %llu running %llu\n", 3170db94535dSChris Mason (unsigned long long)buf->start, 3171d397712bSChris Mason (unsigned long long)transid, 3172d397712bSChris Mason (unsigned long long)root->fs_info->generation); 3173ccd467d6SChris Mason WARN_ON(1); 3174ccd467d6SChris Mason } 3175b9473439SChris Mason was_dirty = set_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, 3176b9473439SChris Mason buf); 3177b9473439SChris Mason if (!was_dirty) { 3178b9473439SChris Mason spin_lock(&root->fs_info->delalloc_lock); 3179b9473439SChris Mason root->fs_info->dirty_metadata_bytes += buf->len; 3180b9473439SChris Mason spin_unlock(&root->fs_info->delalloc_lock); 3181b9473439SChris Mason } 3182eb60ceacSChris Mason } 3183eb60ceacSChris Mason 3184d3c2fdcfSChris Mason void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) 318535b7e476SChris Mason { 3186188de649SChris Mason /* 3187188de649SChris Mason * looks as though older kernels can get into trouble with 3188188de649SChris Mason * this code, they end up stuck in balance_dirty_pages forever 3189188de649SChris Mason */ 3190d6bfde87SChris Mason u64 num_dirty; 3191771ed689SChris Mason unsigned long thresh = 32 * 1024 * 1024; 3192d6bfde87SChris Mason 31936933c02eSJens Axboe if (current->flags & PF_MEMALLOC) 3194d6bfde87SChris Mason return; 3195d6bfde87SChris Mason 319616cdcec7SMiao Xie btrfs_balance_delayed_items(root); 319716cdcec7SMiao Xie 319816cdcec7SMiao Xie num_dirty = root->fs_info->dirty_metadata_bytes; 319916cdcec7SMiao Xie 320016cdcec7SMiao Xie if (num_dirty > thresh) { 320116cdcec7SMiao Xie balance_dirty_pages_ratelimited_nr( 320216cdcec7SMiao Xie root->fs_info->btree_inode->i_mapping, 1); 320316cdcec7SMiao Xie } 320416cdcec7SMiao Xie return; 320516cdcec7SMiao Xie } 320616cdcec7SMiao Xie 320716cdcec7SMiao Xie void __btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) 320816cdcec7SMiao Xie { 320916cdcec7SMiao Xie /* 321016cdcec7SMiao Xie * looks as though older kernels can get into trouble with 321116cdcec7SMiao Xie * this code, they end up stuck in balance_dirty_pages forever 321216cdcec7SMiao Xie */ 321316cdcec7SMiao Xie u64 num_dirty; 321416cdcec7SMiao Xie unsigned long thresh = 32 * 1024 * 1024; 321516cdcec7SMiao Xie 321616cdcec7SMiao Xie if (current->flags & PF_MEMALLOC) 321716cdcec7SMiao Xie return; 321816cdcec7SMiao Xie 3219585ad2c3SChris Mason num_dirty = root->fs_info->dirty_metadata_bytes; 3220585ad2c3SChris Mason 3221d6bfde87SChris Mason if (num_dirty > thresh) { 3222d3c2fdcfSChris Mason balance_dirty_pages_ratelimited_nr( 3223304fced6SChris Mason root->fs_info->btree_inode->i_mapping, 1); 322435b7e476SChris Mason } 3225188de649SChris Mason return; 3226d6bfde87SChris Mason } 32276b80053dSChris Mason 3228ca7a79adSChris Mason int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) 32296b80053dSChris Mason { 3230810191ffSChris Mason struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; 3231ce9adaa5SChris Mason int ret; 3232ca7a79adSChris Mason ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 3233d397712bSChris Mason if (ret == 0) 3234b4ce94deSChris Mason set_bit(EXTENT_BUFFER_UPTODATE, &buf->bflags); 3235ce9adaa5SChris Mason return ret; 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_io_tree *io_tree = &BTRFS_I(inode)->io_tree; 32444bef0848SChris Mason struct extent_buffer *eb; 32454bef0848SChris Mason unsigned long len; 32464bef0848SChris Mason u64 bytenr = page_offset(page); 32474bef0848SChris Mason 32484bef0848SChris Mason if (page->private == EXTENT_PAGE_PRIVATE) 32494bef0848SChris Mason goto out; 32504bef0848SChris Mason 32514bef0848SChris Mason len = page->private >> 2; 3252f09d1f60SDavid Sterba eb = find_extent_buffer(io_tree, bytenr, len); 32534bef0848SChris Mason if (!eb) 32544bef0848SChris Mason goto out; 32554bef0848SChris Mason 325601d658f2SChris Mason if (!btrfs_try_tree_write_lock(eb)) { 325701d658f2SChris Mason flush_fn(data); 32584bef0848SChris Mason btrfs_tree_lock(eb); 325901d658f2SChris Mason } 32604bef0848SChris Mason btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN); 3261b9473439SChris Mason 3262b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)) { 3263b9473439SChris Mason spin_lock(&root->fs_info->delalloc_lock); 3264b9473439SChris Mason if (root->fs_info->dirty_metadata_bytes >= eb->len) 3265b9473439SChris Mason root->fs_info->dirty_metadata_bytes -= eb->len; 3266b9473439SChris Mason else 3267b9473439SChris Mason WARN_ON(1); 3268b9473439SChris Mason spin_unlock(&root->fs_info->delalloc_lock); 3269b9473439SChris Mason } 3270b9473439SChris Mason 32714bef0848SChris Mason btrfs_tree_unlock(eb); 32724bef0848SChris Mason free_extent_buffer(eb); 32734bef0848SChris Mason out: 327401d658f2SChris Mason if (!trylock_page(page)) { 327501d658f2SChris Mason flush_fn(data); 32764bef0848SChris Mason lock_page(page); 327701d658f2SChris Mason } 32784bef0848SChris Mason return 0; 32794bef0848SChris Mason } 32804bef0848SChris Mason 3281acce952bSliubo static void btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 3282acce952bSliubo int read_only) 3283acce952bSliubo { 3284acce952bSliubo if (read_only) 3285acce952bSliubo return; 3286acce952bSliubo 3287acce952bSliubo if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) 3288acce952bSliubo printk(KERN_WARNING "warning: mount fs with errors, " 3289acce952bSliubo "running btrfsck is recommended\n"); 3290acce952bSliubo } 3291acce952bSliubo 3292acce952bSliubo int btrfs_error_commit_super(struct btrfs_root *root) 3293acce952bSliubo { 3294acce952bSliubo int ret; 3295acce952bSliubo 3296acce952bSliubo mutex_lock(&root->fs_info->cleaner_mutex); 3297acce952bSliubo btrfs_run_delayed_iputs(root); 3298acce952bSliubo mutex_unlock(&root->fs_info->cleaner_mutex); 3299acce952bSliubo 3300acce952bSliubo down_write(&root->fs_info->cleanup_work_sem); 3301acce952bSliubo up_write(&root->fs_info->cleanup_work_sem); 3302acce952bSliubo 3303acce952bSliubo /* cleanup FS via transaction */ 3304acce952bSliubo btrfs_cleanup_transaction(root); 3305acce952bSliubo 3306acce952bSliubo ret = write_ctree_super(NULL, root, 0); 3307acce952bSliubo 3308acce952bSliubo return ret; 3309acce952bSliubo } 3310acce952bSliubo 3311143bede5SJeff Mahoney static void btrfs_destroy_ordered_operations(struct btrfs_root *root) 3312acce952bSliubo { 3313acce952bSliubo struct btrfs_inode *btrfs_inode; 3314acce952bSliubo struct list_head splice; 3315acce952bSliubo 3316acce952bSliubo INIT_LIST_HEAD(&splice); 3317acce952bSliubo 3318acce952bSliubo mutex_lock(&root->fs_info->ordered_operations_mutex); 3319acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3320acce952bSliubo 3321acce952bSliubo list_splice_init(&root->fs_info->ordered_operations, &splice); 3322acce952bSliubo while (!list_empty(&splice)) { 3323acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3324acce952bSliubo ordered_operations); 3325acce952bSliubo 3326acce952bSliubo list_del_init(&btrfs_inode->ordered_operations); 3327acce952bSliubo 3328acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3329acce952bSliubo } 3330acce952bSliubo 3331acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3332acce952bSliubo mutex_unlock(&root->fs_info->ordered_operations_mutex); 3333acce952bSliubo } 3334acce952bSliubo 3335143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root) 3336acce952bSliubo { 3337acce952bSliubo struct list_head splice; 3338acce952bSliubo struct btrfs_ordered_extent *ordered; 3339acce952bSliubo struct inode *inode; 3340acce952bSliubo 3341acce952bSliubo INIT_LIST_HEAD(&splice); 3342acce952bSliubo 3343acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3344acce952bSliubo 3345acce952bSliubo list_splice_init(&root->fs_info->ordered_extents, &splice); 3346acce952bSliubo while (!list_empty(&splice)) { 3347acce952bSliubo ordered = list_entry(splice.next, struct btrfs_ordered_extent, 3348acce952bSliubo root_extent_list); 3349acce952bSliubo 3350acce952bSliubo list_del_init(&ordered->root_extent_list); 3351acce952bSliubo atomic_inc(&ordered->refs); 3352acce952bSliubo 3353acce952bSliubo /* the inode may be getting freed (in sys_unlink path). */ 3354acce952bSliubo inode = igrab(ordered->inode); 3355acce952bSliubo 3356acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3357acce952bSliubo if (inode) 3358acce952bSliubo iput(inode); 3359acce952bSliubo 3360acce952bSliubo atomic_set(&ordered->refs, 1); 3361acce952bSliubo btrfs_put_ordered_extent(ordered); 3362acce952bSliubo 3363acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3364acce952bSliubo } 3365acce952bSliubo 3366acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3367acce952bSliubo } 3368acce952bSliubo 3369acce952bSliubo static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 3370acce952bSliubo struct btrfs_root *root) 3371acce952bSliubo { 3372acce952bSliubo struct rb_node *node; 3373acce952bSliubo struct btrfs_delayed_ref_root *delayed_refs; 3374acce952bSliubo struct btrfs_delayed_ref_node *ref; 3375acce952bSliubo int ret = 0; 3376acce952bSliubo 3377acce952bSliubo delayed_refs = &trans->delayed_refs; 3378acce952bSliubo 3379acce952bSliubo spin_lock(&delayed_refs->lock); 3380acce952bSliubo if (delayed_refs->num_entries == 0) { 3381cfece4dbSDavid Sterba spin_unlock(&delayed_refs->lock); 3382acce952bSliubo printk(KERN_INFO "delayed_refs has NO entry\n"); 3383acce952bSliubo return ret; 3384acce952bSliubo } 3385acce952bSliubo 3386acce952bSliubo node = rb_first(&delayed_refs->root); 3387acce952bSliubo while (node) { 3388acce952bSliubo ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node); 3389acce952bSliubo node = rb_next(node); 3390acce952bSliubo 3391acce952bSliubo ref->in_tree = 0; 3392acce952bSliubo rb_erase(&ref->rb_node, &delayed_refs->root); 3393acce952bSliubo delayed_refs->num_entries--; 3394acce952bSliubo 3395acce952bSliubo atomic_set(&ref->refs, 1); 3396acce952bSliubo if (btrfs_delayed_ref_is_head(ref)) { 3397acce952bSliubo struct btrfs_delayed_ref_head *head; 3398acce952bSliubo 3399acce952bSliubo head = btrfs_delayed_node_to_head(ref); 3400acce952bSliubo mutex_lock(&head->mutex); 3401acce952bSliubo kfree(head->extent_op); 3402acce952bSliubo delayed_refs->num_heads--; 3403acce952bSliubo if (list_empty(&head->cluster)) 3404acce952bSliubo delayed_refs->num_heads_ready--; 3405acce952bSliubo list_del_init(&head->cluster); 3406acce952bSliubo mutex_unlock(&head->mutex); 3407acce952bSliubo } 3408acce952bSliubo 3409acce952bSliubo spin_unlock(&delayed_refs->lock); 3410acce952bSliubo btrfs_put_delayed_ref(ref); 3411acce952bSliubo 3412acce952bSliubo cond_resched(); 3413acce952bSliubo spin_lock(&delayed_refs->lock); 3414acce952bSliubo } 3415acce952bSliubo 3416acce952bSliubo spin_unlock(&delayed_refs->lock); 3417acce952bSliubo 3418acce952bSliubo return ret; 3419acce952bSliubo } 3420acce952bSliubo 3421143bede5SJeff Mahoney static void btrfs_destroy_pending_snapshots(struct btrfs_transaction *t) 3422acce952bSliubo { 3423acce952bSliubo struct btrfs_pending_snapshot *snapshot; 3424acce952bSliubo struct list_head splice; 3425acce952bSliubo 3426acce952bSliubo INIT_LIST_HEAD(&splice); 3427acce952bSliubo 3428acce952bSliubo list_splice_init(&t->pending_snapshots, &splice); 3429acce952bSliubo 3430acce952bSliubo while (!list_empty(&splice)) { 3431acce952bSliubo snapshot = list_entry(splice.next, 3432acce952bSliubo struct btrfs_pending_snapshot, 3433acce952bSliubo list); 3434acce952bSliubo 3435acce952bSliubo list_del_init(&snapshot->list); 3436acce952bSliubo 3437acce952bSliubo kfree(snapshot); 3438acce952bSliubo } 3439acce952bSliubo } 3440acce952bSliubo 3441143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) 3442acce952bSliubo { 3443acce952bSliubo struct btrfs_inode *btrfs_inode; 3444acce952bSliubo struct list_head splice; 3445acce952bSliubo 3446acce952bSliubo INIT_LIST_HEAD(&splice); 3447acce952bSliubo 3448acce952bSliubo spin_lock(&root->fs_info->delalloc_lock); 34495be76758SDavid Sterba list_splice_init(&root->fs_info->delalloc_inodes, &splice); 3450acce952bSliubo 3451acce952bSliubo while (!list_empty(&splice)) { 3452acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3453acce952bSliubo delalloc_inodes); 3454acce952bSliubo 3455acce952bSliubo list_del_init(&btrfs_inode->delalloc_inodes); 3456acce952bSliubo 3457acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3458acce952bSliubo } 3459acce952bSliubo 3460acce952bSliubo spin_unlock(&root->fs_info->delalloc_lock); 3461acce952bSliubo } 3462acce952bSliubo 3463acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 3464acce952bSliubo struct extent_io_tree *dirty_pages, 3465acce952bSliubo int mark) 3466acce952bSliubo { 3467acce952bSliubo int ret; 3468acce952bSliubo struct page *page; 3469acce952bSliubo struct inode *btree_inode = root->fs_info->btree_inode; 3470acce952bSliubo struct extent_buffer *eb; 3471acce952bSliubo u64 start = 0; 3472acce952bSliubo u64 end; 3473acce952bSliubo u64 offset; 3474acce952bSliubo unsigned long index; 3475acce952bSliubo 3476acce952bSliubo while (1) { 3477acce952bSliubo ret = find_first_extent_bit(dirty_pages, start, &start, &end, 3478acce952bSliubo mark); 3479acce952bSliubo if (ret) 3480acce952bSliubo break; 3481acce952bSliubo 3482acce952bSliubo clear_extent_bits(dirty_pages, start, end, mark, GFP_NOFS); 3483acce952bSliubo while (start <= end) { 3484acce952bSliubo index = start >> PAGE_CACHE_SHIFT; 3485acce952bSliubo start = (u64)(index + 1) << PAGE_CACHE_SHIFT; 3486acce952bSliubo page = find_get_page(btree_inode->i_mapping, index); 3487acce952bSliubo if (!page) 3488acce952bSliubo continue; 3489acce952bSliubo offset = page_offset(page); 3490acce952bSliubo 3491acce952bSliubo spin_lock(&dirty_pages->buffer_lock); 3492acce952bSliubo eb = radix_tree_lookup( 3493acce952bSliubo &(&BTRFS_I(page->mapping->host)->io_tree)->buffer, 3494acce952bSliubo offset >> PAGE_CACHE_SHIFT); 3495acce952bSliubo spin_unlock(&dirty_pages->buffer_lock); 3496acce952bSliubo if (eb) { 3497acce952bSliubo ret = test_and_clear_bit(EXTENT_BUFFER_DIRTY, 3498acce952bSliubo &eb->bflags); 3499acce952bSliubo atomic_set(&eb->refs, 1); 3500acce952bSliubo } 3501acce952bSliubo if (PageWriteback(page)) 3502acce952bSliubo end_page_writeback(page); 3503acce952bSliubo 3504acce952bSliubo lock_page(page); 3505acce952bSliubo if (PageDirty(page)) { 3506acce952bSliubo clear_page_dirty_for_io(page); 3507acce952bSliubo spin_lock_irq(&page->mapping->tree_lock); 3508acce952bSliubo radix_tree_tag_clear(&page->mapping->page_tree, 3509acce952bSliubo page_index(page), 3510acce952bSliubo PAGECACHE_TAG_DIRTY); 3511acce952bSliubo spin_unlock_irq(&page->mapping->tree_lock); 3512acce952bSliubo } 3513acce952bSliubo 3514acce952bSliubo page->mapping->a_ops->invalidatepage(page, 0); 3515acce952bSliubo unlock_page(page); 3516acce952bSliubo } 3517acce952bSliubo } 3518acce952bSliubo 3519acce952bSliubo return ret; 3520acce952bSliubo } 3521acce952bSliubo 3522acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 3523acce952bSliubo struct extent_io_tree *pinned_extents) 3524acce952bSliubo { 3525acce952bSliubo struct extent_io_tree *unpin; 3526acce952bSliubo u64 start; 3527acce952bSliubo u64 end; 3528acce952bSliubo int ret; 3529acce952bSliubo 3530acce952bSliubo unpin = pinned_extents; 3531acce952bSliubo while (1) { 3532acce952bSliubo ret = find_first_extent_bit(unpin, 0, &start, &end, 3533acce952bSliubo EXTENT_DIRTY); 3534acce952bSliubo if (ret) 3535acce952bSliubo break; 3536acce952bSliubo 3537acce952bSliubo /* opt_discard */ 35385378e607SLi Dongyang if (btrfs_test_opt(root, DISCARD)) 35395378e607SLi Dongyang ret = btrfs_error_discard_extent(root, start, 35405378e607SLi Dongyang end + 1 - start, 35415378e607SLi Dongyang NULL); 3542acce952bSliubo 3543acce952bSliubo clear_extent_dirty(unpin, start, end, GFP_NOFS); 3544acce952bSliubo btrfs_error_unpin_extent_range(root, start, end); 3545acce952bSliubo cond_resched(); 3546acce952bSliubo } 3547acce952bSliubo 3548acce952bSliubo return 0; 3549acce952bSliubo } 3550acce952bSliubo 355149b25e05SJeff Mahoney void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, 355249b25e05SJeff Mahoney struct btrfs_root *root) 355349b25e05SJeff Mahoney { 355449b25e05SJeff Mahoney btrfs_destroy_delayed_refs(cur_trans, root); 355549b25e05SJeff Mahoney btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv, 355649b25e05SJeff Mahoney cur_trans->dirty_pages.dirty_bytes); 355749b25e05SJeff Mahoney 355849b25e05SJeff Mahoney /* FIXME: cleanup wait for commit */ 355949b25e05SJeff Mahoney cur_trans->in_commit = 1; 356049b25e05SJeff Mahoney cur_trans->blocked = 1; 356149b25e05SJeff Mahoney if (waitqueue_active(&root->fs_info->transaction_blocked_wait)) 356249b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_blocked_wait); 356349b25e05SJeff Mahoney 356449b25e05SJeff Mahoney cur_trans->blocked = 0; 356549b25e05SJeff Mahoney if (waitqueue_active(&root->fs_info->transaction_wait)) 356649b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_wait); 356749b25e05SJeff Mahoney 356849b25e05SJeff Mahoney cur_trans->commit_done = 1; 356949b25e05SJeff Mahoney if (waitqueue_active(&cur_trans->commit_wait)) 357049b25e05SJeff Mahoney wake_up(&cur_trans->commit_wait); 357149b25e05SJeff Mahoney 357249b25e05SJeff Mahoney btrfs_destroy_pending_snapshots(cur_trans); 357349b25e05SJeff Mahoney 357449b25e05SJeff Mahoney btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, 357549b25e05SJeff Mahoney EXTENT_DIRTY); 357649b25e05SJeff Mahoney 357749b25e05SJeff Mahoney /* 357849b25e05SJeff Mahoney memset(cur_trans, 0, sizeof(*cur_trans)); 357949b25e05SJeff Mahoney kmem_cache_free(btrfs_transaction_cachep, cur_trans); 358049b25e05SJeff Mahoney */ 358149b25e05SJeff Mahoney } 358249b25e05SJeff Mahoney 358349b25e05SJeff Mahoney int btrfs_cleanup_transaction(struct btrfs_root *root) 3584acce952bSliubo { 3585acce952bSliubo struct btrfs_transaction *t; 3586acce952bSliubo LIST_HEAD(list); 3587acce952bSliubo 3588acce952bSliubo mutex_lock(&root->fs_info->transaction_kthread_mutex); 3589acce952bSliubo 3590a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3591acce952bSliubo list_splice_init(&root->fs_info->trans_list, &list); 3592a4abeea4SJosef Bacik root->fs_info->trans_no_join = 1; 3593a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3594a4abeea4SJosef Bacik 3595acce952bSliubo while (!list_empty(&list)) { 3596acce952bSliubo t = list_entry(list.next, struct btrfs_transaction, list); 3597acce952bSliubo if (!t) 3598acce952bSliubo break; 3599acce952bSliubo 3600acce952bSliubo btrfs_destroy_ordered_operations(root); 3601acce952bSliubo 3602acce952bSliubo btrfs_destroy_ordered_extents(root); 3603acce952bSliubo 3604acce952bSliubo btrfs_destroy_delayed_refs(t, root); 3605acce952bSliubo 3606acce952bSliubo btrfs_block_rsv_release(root, 3607acce952bSliubo &root->fs_info->trans_block_rsv, 3608acce952bSliubo t->dirty_pages.dirty_bytes); 3609acce952bSliubo 3610acce952bSliubo /* FIXME: cleanup wait for commit */ 3611acce952bSliubo t->in_commit = 1; 3612acce952bSliubo t->blocked = 1; 3613acce952bSliubo if (waitqueue_active(&root->fs_info->transaction_blocked_wait)) 3614acce952bSliubo wake_up(&root->fs_info->transaction_blocked_wait); 3615acce952bSliubo 3616acce952bSliubo t->blocked = 0; 3617acce952bSliubo if (waitqueue_active(&root->fs_info->transaction_wait)) 3618acce952bSliubo wake_up(&root->fs_info->transaction_wait); 3619acce952bSliubo 3620acce952bSliubo t->commit_done = 1; 3621acce952bSliubo if (waitqueue_active(&t->commit_wait)) 3622acce952bSliubo wake_up(&t->commit_wait); 3623acce952bSliubo 3624acce952bSliubo btrfs_destroy_pending_snapshots(t); 3625acce952bSliubo 3626acce952bSliubo btrfs_destroy_delalloc_inodes(root); 3627acce952bSliubo 3628a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3629acce952bSliubo root->fs_info->running_transaction = NULL; 3630a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3631acce952bSliubo 3632acce952bSliubo btrfs_destroy_marked_extents(root, &t->dirty_pages, 3633acce952bSliubo EXTENT_DIRTY); 3634acce952bSliubo 3635acce952bSliubo btrfs_destroy_pinned_extent(root, 3636acce952bSliubo root->fs_info->pinned_extents); 3637acce952bSliubo 363813c5a93eSJosef Bacik atomic_set(&t->use_count, 0); 3639acce952bSliubo list_del_init(&t->list); 3640acce952bSliubo memset(t, 0, sizeof(*t)); 3641acce952bSliubo kmem_cache_free(btrfs_transaction_cachep, t); 3642acce952bSliubo } 3643acce952bSliubo 3644a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3645a4abeea4SJosef Bacik root->fs_info->trans_no_join = 0; 3646a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3647acce952bSliubo mutex_unlock(&root->fs_info->transaction_kthread_mutex); 3648acce952bSliubo 3649acce952bSliubo return 0; 3650acce952bSliubo } 3651acce952bSliubo 3652d1310b2eSChris Mason static struct extent_io_ops btree_extent_io_ops = { 36534bef0848SChris Mason .write_cache_pages_lock_hook = btree_lock_page_hook, 3654ce9adaa5SChris Mason .readpage_end_io_hook = btree_readpage_end_io_hook, 36554bb31e92SArne Jansen .readpage_io_failed_hook = btree_io_failed_hook, 36560b86a832SChris Mason .submit_bio_hook = btree_submit_bio_hook, 3657239b14b3SChris Mason /* note we're sharing with inode.c for the merge bio hook */ 3658239b14b3SChris Mason .merge_bio_hook = btrfs_merge_bio_hook, 36590da5468fSChris Mason }; 3660