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); 53acce952bSliubo static int btrfs_destroy_ordered_operations(struct btrfs_root *root); 54acce952bSliubo static int btrfs_destroy_ordered_extents(struct btrfs_root *root); 55acce952bSliubo static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 56acce952bSliubo struct btrfs_root *root); 57acce952bSliubo static int btrfs_destroy_pending_snapshots(struct btrfs_transaction *t); 58acce952bSliubo static int 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); 64acce952bSliubo static int btrfs_cleanup_transaction(struct btrfs_root *root); 65ce9adaa5SChris Mason 66d352ac68SChris Mason /* 67d352ac68SChris Mason * end_io_wq structs are used to do processing in task context when an IO is 68d352ac68SChris Mason * complete. This is used during reads to verify checksums, and it is used 69d352ac68SChris Mason * by writes to insert metadata for new file extents after IO is complete. 70d352ac68SChris Mason */ 71ce9adaa5SChris Mason struct end_io_wq { 72ce9adaa5SChris Mason struct bio *bio; 73ce9adaa5SChris Mason bio_end_io_t *end_io; 74ce9adaa5SChris Mason void *private; 75ce9adaa5SChris Mason struct btrfs_fs_info *info; 76ce9adaa5SChris Mason int error; 7722c59948SChris Mason int metadata; 78ce9adaa5SChris Mason struct list_head list; 798b712842SChris Mason struct btrfs_work work; 80ce9adaa5SChris Mason }; 810da5468fSChris Mason 82d352ac68SChris Mason /* 83d352ac68SChris Mason * async submit bios are used to offload expensive checksumming 84d352ac68SChris Mason * onto the worker threads. They checksum file and metadata bios 85d352ac68SChris Mason * just before they are sent down the IO stack. 86d352ac68SChris Mason */ 8744b8bd7eSChris Mason struct async_submit_bio { 8844b8bd7eSChris Mason struct inode *inode; 8944b8bd7eSChris Mason struct bio *bio; 9044b8bd7eSChris Mason struct list_head list; 914a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start; 924a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done; 9344b8bd7eSChris Mason int rw; 9444b8bd7eSChris Mason int mirror_num; 95c8b97818SChris Mason unsigned long bio_flags; 96eaf25d93SChris Mason /* 97eaf25d93SChris Mason * bio_offset is optional, can be used if the pages in the bio 98eaf25d93SChris Mason * can't tell us where in the file the bio should go 99eaf25d93SChris Mason */ 100eaf25d93SChris Mason u64 bio_offset; 1018b712842SChris Mason struct btrfs_work work; 10244b8bd7eSChris Mason }; 10344b8bd7eSChris Mason 10485d4e461SChris Mason /* 10585d4e461SChris Mason * Lockdep class keys for extent_buffer->lock's in this root. For a given 10685d4e461SChris Mason * eb, the lockdep key is determined by the btrfs_root it belongs to and 10785d4e461SChris Mason * the level the eb occupies in the tree. 1084008c04aSChris Mason * 10985d4e461SChris Mason * Different roots are used for different purposes and may nest inside each 11085d4e461SChris Mason * other and they require separate keysets. As lockdep keys should be 11185d4e461SChris Mason * static, assign keysets according to the purpose of the root as indicated 11285d4e461SChris Mason * by btrfs_root->objectid. This ensures that all special purpose roots 11385d4e461SChris Mason * have separate keysets. 1144008c04aSChris Mason * 11585d4e461SChris Mason * Lock-nesting across peer nodes is always done with the immediate parent 11685d4e461SChris Mason * node locked thus preventing deadlock. As lockdep doesn't know this, use 11785d4e461SChris Mason * subclass to avoid triggering lockdep warning in such cases. 1184008c04aSChris Mason * 11985d4e461SChris Mason * The key is set by the readpage_end_io_hook after the buffer has passed 12085d4e461SChris Mason * csum validation but before the pages are unlocked. It is also set by 12185d4e461SChris Mason * btrfs_init_new_buffer on freshly allocated blocks. 12285d4e461SChris Mason * 12385d4e461SChris Mason * We also add a check to make sure the highest level of the tree is the 12485d4e461SChris Mason * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code 12585d4e461SChris Mason * needs update as well. 1264008c04aSChris Mason */ 1274008c04aSChris Mason #ifdef CONFIG_DEBUG_LOCK_ALLOC 1284008c04aSChris Mason # if BTRFS_MAX_LEVEL != 8 1294008c04aSChris Mason # error 1304008c04aSChris Mason # endif 13185d4e461SChris Mason 13285d4e461SChris Mason static struct btrfs_lockdep_keyset { 13385d4e461SChris Mason u64 id; /* root objectid */ 13485d4e461SChris Mason const char *name_stem; /* lock name stem */ 13585d4e461SChris Mason char names[BTRFS_MAX_LEVEL + 1][20]; 13685d4e461SChris Mason struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; 13785d4e461SChris Mason } btrfs_lockdep_keysets[] = { 13885d4e461SChris Mason { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, 13985d4e461SChris Mason { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, 14085d4e461SChris Mason { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, 14185d4e461SChris Mason { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, 14285d4e461SChris Mason { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, 14385d4e461SChris Mason { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, 14485d4e461SChris Mason { .id = BTRFS_ORPHAN_OBJECTID, .name_stem = "orphan" }, 14585d4e461SChris Mason { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, 14685d4e461SChris Mason { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, 14785d4e461SChris Mason { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, 14885d4e461SChris Mason { .id = 0, .name_stem = "tree" }, 1494008c04aSChris Mason }; 15085d4e461SChris Mason 15185d4e461SChris Mason void __init btrfs_init_lockdep(void) 15285d4e461SChris Mason { 15385d4e461SChris Mason int i, j; 15485d4e461SChris Mason 15585d4e461SChris Mason /* initialize lockdep class names */ 15685d4e461SChris Mason for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { 15785d4e461SChris Mason struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; 15885d4e461SChris Mason 15985d4e461SChris Mason for (j = 0; j < ARRAY_SIZE(ks->names); j++) 16085d4e461SChris Mason snprintf(ks->names[j], sizeof(ks->names[j]), 16185d4e461SChris Mason "btrfs-%s-%02d", ks->name_stem, j); 16285d4e461SChris Mason } 16385d4e461SChris Mason } 16485d4e461SChris Mason 16585d4e461SChris Mason void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, 16685d4e461SChris Mason int level) 16785d4e461SChris Mason { 16885d4e461SChris Mason struct btrfs_lockdep_keyset *ks; 16985d4e461SChris Mason 17085d4e461SChris Mason BUG_ON(level >= ARRAY_SIZE(ks->keys)); 17185d4e461SChris Mason 17285d4e461SChris Mason /* find the matching keyset, id 0 is the default entry */ 17385d4e461SChris Mason for (ks = btrfs_lockdep_keysets; ks->id; ks++) 17485d4e461SChris Mason if (ks->id == objectid) 17585d4e461SChris Mason break; 17685d4e461SChris Mason 17785d4e461SChris Mason lockdep_set_class_and_name(&eb->lock, 17885d4e461SChris Mason &ks->keys[level], ks->names[level]); 17985d4e461SChris Mason } 18085d4e461SChris Mason 1814008c04aSChris Mason #endif 1824008c04aSChris Mason 183d352ac68SChris Mason /* 184d352ac68SChris Mason * extents on the btree inode are pretty simple, there's one extent 185d352ac68SChris Mason * that covers the entire device 186d352ac68SChris Mason */ 187b2950863SChristoph Hellwig static struct extent_map *btree_get_extent(struct inode *inode, 188306e16ceSDavid Sterba struct page *page, size_t pg_offset, u64 start, u64 len, 1895f39d397SChris Mason int create) 1905f39d397SChris Mason { 1915f39d397SChris Mason struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; 1925f39d397SChris Mason struct extent_map *em; 1935f39d397SChris Mason int ret; 1945f39d397SChris Mason 195890871beSChris Mason read_lock(&em_tree->lock); 196d1310b2eSChris Mason em = lookup_extent_mapping(em_tree, start, len); 197a061fc8dSChris Mason if (em) { 198a061fc8dSChris Mason em->bdev = 199a061fc8dSChris Mason BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 200890871beSChris Mason read_unlock(&em_tree->lock); 2015f39d397SChris Mason goto out; 202a061fc8dSChris Mason } 203890871beSChris Mason read_unlock(&em_tree->lock); 2047b13b7b1SChris Mason 205172ddd60SDavid Sterba em = alloc_extent_map(); 2065f39d397SChris Mason if (!em) { 2075f39d397SChris Mason em = ERR_PTR(-ENOMEM); 2085f39d397SChris Mason goto out; 2095f39d397SChris Mason } 2105f39d397SChris Mason em->start = 0; 2110afbaf8cSChris Mason em->len = (u64)-1; 212c8b97818SChris Mason em->block_len = (u64)-1; 2135f39d397SChris Mason em->block_start = 0; 214a061fc8dSChris Mason em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 215d1310b2eSChris Mason 216890871beSChris Mason write_lock(&em_tree->lock); 2175f39d397SChris Mason ret = add_extent_mapping(em_tree, em); 2185f39d397SChris Mason if (ret == -EEXIST) { 2190afbaf8cSChris Mason u64 failed_start = em->start; 2200afbaf8cSChris Mason u64 failed_len = em->len; 2210afbaf8cSChris Mason 2225f39d397SChris Mason free_extent_map(em); 2237b13b7b1SChris Mason em = lookup_extent_mapping(em_tree, start, len); 2240afbaf8cSChris Mason if (em) { 2257b13b7b1SChris Mason ret = 0; 2260afbaf8cSChris Mason } else { 2270afbaf8cSChris Mason em = lookup_extent_mapping(em_tree, failed_start, 2280afbaf8cSChris Mason failed_len); 2297b13b7b1SChris Mason ret = -EIO; 2300afbaf8cSChris Mason } 2315f39d397SChris Mason } else if (ret) { 2327b13b7b1SChris Mason free_extent_map(em); 2337b13b7b1SChris Mason em = NULL; 2345f39d397SChris Mason } 235890871beSChris Mason write_unlock(&em_tree->lock); 2367b13b7b1SChris Mason 2377b13b7b1SChris Mason if (ret) 2387b13b7b1SChris Mason em = ERR_PTR(ret); 2395f39d397SChris Mason out: 2405f39d397SChris Mason return em; 2415f39d397SChris Mason } 2425f39d397SChris Mason 24319c00ddcSChris Mason u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len) 24419c00ddcSChris Mason { 245163e783eSDavid Woodhouse return crc32c(seed, data, len); 24619c00ddcSChris Mason } 24719c00ddcSChris Mason 24819c00ddcSChris Mason void btrfs_csum_final(u32 crc, char *result) 24919c00ddcSChris Mason { 2507e75bf3fSDavid Sterba put_unaligned_le32(~crc, result); 25119c00ddcSChris Mason } 25219c00ddcSChris Mason 253d352ac68SChris Mason /* 254d352ac68SChris Mason * compute the csum for a btree block, and either verify it or write it 255d352ac68SChris Mason * into the csum field of the block. 256d352ac68SChris Mason */ 25719c00ddcSChris Mason static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, 25819c00ddcSChris Mason int verify) 25919c00ddcSChris Mason { 2606c41761fSDavid Sterba u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy); 261607d432dSJosef Bacik char *result = NULL; 26219c00ddcSChris Mason unsigned long len; 26319c00ddcSChris Mason unsigned long cur_len; 26419c00ddcSChris Mason unsigned long offset = BTRFS_CSUM_SIZE; 26519c00ddcSChris Mason char *kaddr; 26619c00ddcSChris Mason unsigned long map_start; 26719c00ddcSChris Mason unsigned long map_len; 26819c00ddcSChris Mason int err; 26919c00ddcSChris Mason u32 crc = ~(u32)0; 270607d432dSJosef Bacik unsigned long inline_result; 27119c00ddcSChris Mason 27219c00ddcSChris Mason len = buf->len - offset; 27319c00ddcSChris Mason while (len > 0) { 27419c00ddcSChris Mason err = map_private_extent_buffer(buf, offset, 32, 275a6591715SChris Mason &kaddr, &map_start, &map_len); 276d397712bSChris Mason if (err) 27719c00ddcSChris Mason return 1; 27819c00ddcSChris Mason cur_len = min(len, map_len - (offset - map_start)); 27919c00ddcSChris Mason crc = btrfs_csum_data(root, kaddr + offset - map_start, 28019c00ddcSChris Mason crc, cur_len); 28119c00ddcSChris Mason len -= cur_len; 28219c00ddcSChris Mason offset += cur_len; 28319c00ddcSChris Mason } 284607d432dSJosef Bacik if (csum_size > sizeof(inline_result)) { 285607d432dSJosef Bacik result = kzalloc(csum_size * sizeof(char), GFP_NOFS); 286607d432dSJosef Bacik if (!result) 287607d432dSJosef Bacik return 1; 288607d432dSJosef Bacik } else { 289607d432dSJosef Bacik result = (char *)&inline_result; 290607d432dSJosef Bacik } 291607d432dSJosef Bacik 29219c00ddcSChris Mason btrfs_csum_final(crc, result); 29319c00ddcSChris Mason 29419c00ddcSChris Mason if (verify) { 295607d432dSJosef Bacik if (memcmp_extent_buffer(buf, result, 0, csum_size)) { 296e4204dedSChris Mason u32 val; 297e4204dedSChris Mason u32 found = 0; 298607d432dSJosef Bacik memcpy(&found, result, csum_size); 299e4204dedSChris Mason 300607d432dSJosef Bacik read_extent_buffer(buf, &val, 0, csum_size); 3017a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs: %s checksum verify " 302193f284dSChris Mason "failed on %llu wanted %X found %X " 303193f284dSChris Mason "level %d\n", 30419c00ddcSChris Mason root->fs_info->sb->s_id, 305193f284dSChris Mason (unsigned long long)buf->start, val, found, 306193f284dSChris Mason btrfs_header_level(buf)); 307607d432dSJosef Bacik if (result != (char *)&inline_result) 308607d432dSJosef Bacik kfree(result); 30919c00ddcSChris Mason return 1; 31019c00ddcSChris Mason } 31119c00ddcSChris Mason } else { 312607d432dSJosef Bacik write_extent_buffer(buf, result, 0, csum_size); 31319c00ddcSChris Mason } 314607d432dSJosef Bacik if (result != (char *)&inline_result) 315607d432dSJosef Bacik kfree(result); 31619c00ddcSChris Mason return 0; 31719c00ddcSChris Mason } 31819c00ddcSChris Mason 319d352ac68SChris Mason /* 320d352ac68SChris Mason * we can't consider a given block up to date unless the transid of the 321d352ac68SChris Mason * block matches the transid in the parent node's pointer. This is how we 322d352ac68SChris Mason * detect blocks that either didn't get written at all or got written 323d352ac68SChris Mason * in the wrong place. 324d352ac68SChris Mason */ 3251259ab75SChris Mason static int verify_parent_transid(struct extent_io_tree *io_tree, 3261259ab75SChris Mason struct extent_buffer *eb, u64 parent_transid) 3271259ab75SChris Mason { 3282ac55d41SJosef Bacik struct extent_state *cached_state = NULL; 3291259ab75SChris Mason int ret; 3301259ab75SChris Mason 3311259ab75SChris Mason if (!parent_transid || btrfs_header_generation(eb) == parent_transid) 3321259ab75SChris Mason return 0; 3331259ab75SChris Mason 3342ac55d41SJosef Bacik lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, 3352ac55d41SJosef Bacik 0, &cached_state, GFP_NOFS); 3362ac55d41SJosef Bacik if (extent_buffer_uptodate(io_tree, eb, cached_state) && 3371259ab75SChris Mason btrfs_header_generation(eb) == parent_transid) { 3381259ab75SChris Mason ret = 0; 3391259ab75SChris Mason goto out; 3401259ab75SChris Mason } 3417a36ddecSDavid Sterba printk_ratelimited("parent transid verify failed on %llu wanted %llu " 342193f284dSChris Mason "found %llu\n", 3431259ab75SChris Mason (unsigned long long)eb->start, 3441259ab75SChris Mason (unsigned long long)parent_transid, 3451259ab75SChris Mason (unsigned long long)btrfs_header_generation(eb)); 3461259ab75SChris Mason ret = 1; 3472ac55d41SJosef Bacik clear_extent_buffer_uptodate(io_tree, eb, &cached_state); 34833958dc6SChris Mason out: 3492ac55d41SJosef Bacik unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, 3502ac55d41SJosef Bacik &cached_state, GFP_NOFS); 3511259ab75SChris Mason return ret; 3521259ab75SChris Mason } 3531259ab75SChris Mason 354d352ac68SChris Mason /* 355d352ac68SChris Mason * helper to read a given tree block, doing retries as required when 356d352ac68SChris Mason * the checksums don't match and we have alternate mirrors to try. 357d352ac68SChris Mason */ 358f188591eSChris Mason static int btree_read_extent_buffer_pages(struct btrfs_root *root, 359f188591eSChris Mason struct extent_buffer *eb, 360ca7a79adSChris Mason u64 start, u64 parent_transid) 361f188591eSChris Mason { 362f188591eSChris Mason struct extent_io_tree *io_tree; 363f188591eSChris Mason int ret; 364f188591eSChris Mason int num_copies = 0; 365f188591eSChris Mason int mirror_num = 0; 366f188591eSChris Mason 367a826d6dcSJosef Bacik clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 368f188591eSChris Mason io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; 369f188591eSChris Mason while (1) { 370bb82ab88SArne Jansen ret = read_extent_buffer_pages(io_tree, eb, start, 371bb82ab88SArne Jansen WAIT_COMPLETE, 372f188591eSChris Mason btree_get_extent, mirror_num); 3731259ab75SChris Mason if (!ret && 3741259ab75SChris Mason !verify_parent_transid(io_tree, eb, parent_transid)) 375f188591eSChris Mason return ret; 376d397712bSChris Mason 377a826d6dcSJosef Bacik /* 378a826d6dcSJosef Bacik * This buffer's crc is fine, but its contents are corrupted, so 379a826d6dcSJosef Bacik * there is no reason to read the other copies, they won't be 380a826d6dcSJosef Bacik * any less wrong. 381a826d6dcSJosef Bacik */ 382a826d6dcSJosef Bacik if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) 383a826d6dcSJosef Bacik return ret; 384a826d6dcSJosef Bacik 385f188591eSChris Mason num_copies = btrfs_num_copies(&root->fs_info->mapping_tree, 386f188591eSChris Mason eb->start, eb->len); 3874235298eSChris Mason if (num_copies == 1) 388f188591eSChris Mason return ret; 3894235298eSChris Mason 390f188591eSChris Mason mirror_num++; 3914235298eSChris Mason if (mirror_num > num_copies) 392f188591eSChris Mason return ret; 393f188591eSChris Mason } 394f188591eSChris Mason return -EIO; 395f188591eSChris Mason } 39619c00ddcSChris Mason 397d352ac68SChris Mason /* 398d397712bSChris Mason * checksum a dirty tree block before IO. This has extra checks to make sure 399d397712bSChris Mason * we only fill in the checksum field in the first page of a multi-page block 400d352ac68SChris Mason */ 401d397712bSChris Mason 402b2950863SChristoph Hellwig static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) 40319c00ddcSChris Mason { 404d1310b2eSChris Mason struct extent_io_tree *tree; 40535ebb934SChris Mason u64 start = (u64)page->index << PAGE_CACHE_SHIFT; 40619c00ddcSChris Mason u64 found_start; 40719c00ddcSChris Mason unsigned long len; 40819c00ddcSChris Mason struct extent_buffer *eb; 409f188591eSChris Mason int ret; 410f188591eSChris Mason 411d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 41219c00ddcSChris Mason 413eb14ab8eSChris Mason if (page->private == EXTENT_PAGE_PRIVATE) { 414eb14ab8eSChris Mason WARN_ON(1); 41519c00ddcSChris Mason goto out; 416eb14ab8eSChris Mason } 417eb14ab8eSChris Mason if (!page->private) { 418eb14ab8eSChris Mason WARN_ON(1); 41919c00ddcSChris Mason goto out; 420eb14ab8eSChris Mason } 42119c00ddcSChris Mason len = page->private >> 2; 422d397712bSChris Mason WARN_ON(len == 0); 423d397712bSChris Mason 424ba144192SDavid Sterba eb = alloc_extent_buffer(tree, start, len, page); 42591ca338dSTsutomu Itoh if (eb == NULL) { 42691ca338dSTsutomu Itoh WARN_ON(1); 42791ca338dSTsutomu Itoh goto out; 42891ca338dSTsutomu Itoh } 429ca7a79adSChris Mason ret = btree_read_extent_buffer_pages(root, eb, start + PAGE_CACHE_SIZE, 430ca7a79adSChris Mason btrfs_header_generation(eb)); 431f188591eSChris Mason BUG_ON(ret); 432784b4e29SChris Mason WARN_ON(!btrfs_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN)); 433784b4e29SChris Mason 43419c00ddcSChris Mason found_start = btrfs_header_bytenr(eb); 43519c00ddcSChris Mason if (found_start != start) { 43655c69072SChris Mason WARN_ON(1); 43755c69072SChris Mason goto err; 43855c69072SChris Mason } 43955c69072SChris Mason if (eb->first_page != page) { 44055c69072SChris Mason WARN_ON(1); 44155c69072SChris Mason goto err; 44255c69072SChris Mason } 44355c69072SChris Mason if (!PageUptodate(page)) { 44455c69072SChris Mason WARN_ON(1); 44555c69072SChris Mason goto err; 44619c00ddcSChris Mason } 44719c00ddcSChris Mason csum_tree_block(root, eb, 0); 44855c69072SChris Mason err: 44919c00ddcSChris Mason free_extent_buffer(eb); 45019c00ddcSChris Mason out: 45119c00ddcSChris Mason return 0; 45219c00ddcSChris Mason } 45319c00ddcSChris Mason 4542b82032cSYan Zheng static int check_tree_block_fsid(struct btrfs_root *root, 4552b82032cSYan Zheng struct extent_buffer *eb) 4562b82032cSYan Zheng { 4572b82032cSYan Zheng struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; 4582b82032cSYan Zheng u8 fsid[BTRFS_UUID_SIZE]; 4592b82032cSYan Zheng int ret = 1; 4602b82032cSYan Zheng 4612b82032cSYan Zheng read_extent_buffer(eb, fsid, (unsigned long)btrfs_header_fsid(eb), 4622b82032cSYan Zheng BTRFS_FSID_SIZE); 4632b82032cSYan Zheng while (fs_devices) { 4642b82032cSYan Zheng if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { 4652b82032cSYan Zheng ret = 0; 4662b82032cSYan Zheng break; 4672b82032cSYan Zheng } 4682b82032cSYan Zheng fs_devices = fs_devices->seed; 4692b82032cSYan Zheng } 4702b82032cSYan Zheng return ret; 4712b82032cSYan Zheng } 4722b82032cSYan Zheng 473a826d6dcSJosef Bacik #define CORRUPT(reason, eb, root, slot) \ 474a826d6dcSJosef Bacik printk(KERN_CRIT "btrfs: corrupt leaf, %s: block=%llu," \ 475a826d6dcSJosef Bacik "root=%llu, slot=%d\n", reason, \ 476a826d6dcSJosef Bacik (unsigned long long)btrfs_header_bytenr(eb), \ 477a826d6dcSJosef Bacik (unsigned long long)root->objectid, slot) 478a826d6dcSJosef Bacik 479a826d6dcSJosef Bacik static noinline int check_leaf(struct btrfs_root *root, 480a826d6dcSJosef Bacik struct extent_buffer *leaf) 481a826d6dcSJosef Bacik { 482a826d6dcSJosef Bacik struct btrfs_key key; 483a826d6dcSJosef Bacik struct btrfs_key leaf_key; 484a826d6dcSJosef Bacik u32 nritems = btrfs_header_nritems(leaf); 485a826d6dcSJosef Bacik int slot; 486a826d6dcSJosef Bacik 487a826d6dcSJosef Bacik if (nritems == 0) 488a826d6dcSJosef Bacik return 0; 489a826d6dcSJosef Bacik 490a826d6dcSJosef Bacik /* Check the 0 item */ 491a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != 492a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 493a826d6dcSJosef Bacik CORRUPT("invalid item offset size pair", leaf, root, 0); 494a826d6dcSJosef Bacik return -EIO; 495a826d6dcSJosef Bacik } 496a826d6dcSJosef Bacik 497a826d6dcSJosef Bacik /* 498a826d6dcSJosef Bacik * Check to make sure each items keys are in the correct order and their 499a826d6dcSJosef Bacik * offsets make sense. We only have to loop through nritems-1 because 500a826d6dcSJosef Bacik * we check the current slot against the next slot, which verifies the 501a826d6dcSJosef Bacik * next slot's offset+size makes sense and that the current's slot 502a826d6dcSJosef Bacik * offset is correct. 503a826d6dcSJosef Bacik */ 504a826d6dcSJosef Bacik for (slot = 0; slot < nritems - 1; slot++) { 505a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &leaf_key, slot); 506a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &key, slot + 1); 507a826d6dcSJosef Bacik 508a826d6dcSJosef Bacik /* Make sure the keys are in the right order */ 509a826d6dcSJosef Bacik if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { 510a826d6dcSJosef Bacik CORRUPT("bad key order", leaf, root, slot); 511a826d6dcSJosef Bacik return -EIO; 512a826d6dcSJosef Bacik } 513a826d6dcSJosef Bacik 514a826d6dcSJosef Bacik /* 515a826d6dcSJosef Bacik * Make sure the offset and ends are right, remember that the 516a826d6dcSJosef Bacik * item data starts at the end of the leaf and grows towards the 517a826d6dcSJosef Bacik * front. 518a826d6dcSJosef Bacik */ 519a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, slot) != 520a826d6dcSJosef Bacik btrfs_item_end_nr(leaf, slot + 1)) { 521a826d6dcSJosef Bacik CORRUPT("slot offset bad", leaf, root, slot); 522a826d6dcSJosef Bacik return -EIO; 523a826d6dcSJosef Bacik } 524a826d6dcSJosef Bacik 525a826d6dcSJosef Bacik /* 526a826d6dcSJosef Bacik * Check to make sure that we don't point outside of the leaf, 527a826d6dcSJosef Bacik * just incase all the items are consistent to eachother, but 528a826d6dcSJosef Bacik * all point outside of the leaf. 529a826d6dcSJosef Bacik */ 530a826d6dcSJosef Bacik if (btrfs_item_end_nr(leaf, slot) > 531a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 532a826d6dcSJosef Bacik CORRUPT("slot end outside of leaf", leaf, root, slot); 533a826d6dcSJosef Bacik return -EIO; 534a826d6dcSJosef Bacik } 535a826d6dcSJosef Bacik } 536a826d6dcSJosef Bacik 537a826d6dcSJosef Bacik return 0; 538a826d6dcSJosef Bacik } 539a826d6dcSJosef Bacik 540b2950863SChristoph Hellwig static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end, 541ce9adaa5SChris Mason struct extent_state *state) 542ce9adaa5SChris Mason { 543ce9adaa5SChris Mason struct extent_io_tree *tree; 544ce9adaa5SChris Mason u64 found_start; 545ce9adaa5SChris Mason int found_level; 546ce9adaa5SChris Mason unsigned long len; 547ce9adaa5SChris Mason struct extent_buffer *eb; 548ce9adaa5SChris Mason struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 549f188591eSChris Mason int ret = 0; 550ce9adaa5SChris Mason 551ce9adaa5SChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 552ce9adaa5SChris Mason if (page->private == EXTENT_PAGE_PRIVATE) 553ce9adaa5SChris Mason goto out; 554ce9adaa5SChris Mason if (!page->private) 555ce9adaa5SChris Mason goto out; 556d397712bSChris Mason 557ce9adaa5SChris Mason len = page->private >> 2; 558d397712bSChris Mason WARN_ON(len == 0); 559d397712bSChris Mason 560ba144192SDavid Sterba eb = alloc_extent_buffer(tree, start, len, page); 56191ca338dSTsutomu Itoh if (eb == NULL) { 56291ca338dSTsutomu Itoh ret = -EIO; 56391ca338dSTsutomu Itoh goto out; 56491ca338dSTsutomu Itoh } 565f188591eSChris Mason 566ce9adaa5SChris Mason found_start = btrfs_header_bytenr(eb); 56723a07867SChris Mason if (found_start != start) { 5687a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs bad tree block start " 569193f284dSChris Mason "%llu %llu\n", 570a1b32a59SChris Mason (unsigned long long)found_start, 571a1b32a59SChris Mason (unsigned long long)eb->start); 572f188591eSChris Mason ret = -EIO; 573ce9adaa5SChris Mason goto err; 574ce9adaa5SChris Mason } 575ce9adaa5SChris Mason if (eb->first_page != page) { 576d397712bSChris Mason printk(KERN_INFO "btrfs bad first page %lu %lu\n", 577d397712bSChris Mason eb->first_page->index, page->index); 578ce9adaa5SChris Mason WARN_ON(1); 579f188591eSChris Mason ret = -EIO; 580ce9adaa5SChris Mason goto err; 581ce9adaa5SChris Mason } 5822b82032cSYan Zheng if (check_tree_block_fsid(root, eb)) { 5837a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs bad fsid on block %llu\n", 584d397712bSChris Mason (unsigned long long)eb->start); 5851259ab75SChris Mason ret = -EIO; 5861259ab75SChris Mason goto err; 5871259ab75SChris Mason } 588ce9adaa5SChris Mason found_level = btrfs_header_level(eb); 589ce9adaa5SChris Mason 59085d4e461SChris Mason btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), 59185d4e461SChris Mason eb, found_level); 5924008c04aSChris Mason 593ce9adaa5SChris Mason ret = csum_tree_block(root, eb, 1); 594a826d6dcSJosef Bacik if (ret) { 595f188591eSChris Mason ret = -EIO; 596a826d6dcSJosef Bacik goto err; 597a826d6dcSJosef Bacik } 598a826d6dcSJosef Bacik 599a826d6dcSJosef Bacik /* 600a826d6dcSJosef Bacik * If this is a leaf block and it is corrupt, set the corrupt bit so 601a826d6dcSJosef Bacik * that we don't try and read the other copies of this block, just 602a826d6dcSJosef Bacik * return -EIO. 603a826d6dcSJosef Bacik */ 604a826d6dcSJosef Bacik if (found_level == 0 && check_leaf(root, eb)) { 605a826d6dcSJosef Bacik set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 606a826d6dcSJosef Bacik ret = -EIO; 607a826d6dcSJosef Bacik } 608ce9adaa5SChris Mason 609ce9adaa5SChris Mason end = min_t(u64, eb->len, PAGE_CACHE_SIZE); 610ce9adaa5SChris Mason end = eb->start + end - 1; 611ce9adaa5SChris Mason err: 6124bb31e92SArne Jansen if (test_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) { 6134bb31e92SArne Jansen clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags); 6144bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, ret); 6154bb31e92SArne Jansen } 6164bb31e92SArne Jansen 617ce9adaa5SChris Mason free_extent_buffer(eb); 618ce9adaa5SChris Mason out: 619f188591eSChris Mason return ret; 620ce9adaa5SChris Mason } 621ce9adaa5SChris Mason 6224bb31e92SArne Jansen static int btree_io_failed_hook(struct bio *failed_bio, 6234bb31e92SArne Jansen struct page *page, u64 start, u64 end, 62432240a91SJan Schmidt int mirror_num, struct extent_state *state) 6254bb31e92SArne Jansen { 6264bb31e92SArne Jansen struct extent_io_tree *tree; 6274bb31e92SArne Jansen unsigned long len; 6284bb31e92SArne Jansen struct extent_buffer *eb; 6294bb31e92SArne Jansen struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 6304bb31e92SArne Jansen 6314bb31e92SArne Jansen tree = &BTRFS_I(page->mapping->host)->io_tree; 6324bb31e92SArne Jansen if (page->private == EXTENT_PAGE_PRIVATE) 6334bb31e92SArne Jansen goto out; 6344bb31e92SArne Jansen if (!page->private) 6354bb31e92SArne Jansen goto out; 6364bb31e92SArne Jansen 6374bb31e92SArne Jansen len = page->private >> 2; 6384bb31e92SArne Jansen WARN_ON(len == 0); 6394bb31e92SArne Jansen 6404bb31e92SArne Jansen eb = alloc_extent_buffer(tree, start, len, page); 6414bb31e92SArne Jansen if (eb == NULL) 6424bb31e92SArne Jansen goto out; 6434bb31e92SArne Jansen 6444bb31e92SArne Jansen if (test_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) { 6454bb31e92SArne Jansen clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags); 6464bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, -EIO); 6474bb31e92SArne Jansen } 648c674e04eSChris Mason free_extent_buffer(eb); 6494bb31e92SArne Jansen 6504bb31e92SArne Jansen out: 6514bb31e92SArne Jansen return -EIO; /* we fixed nothing */ 6524bb31e92SArne Jansen } 6534bb31e92SArne Jansen 654ce9adaa5SChris Mason static void end_workqueue_bio(struct bio *bio, int err) 655ce9adaa5SChris Mason { 656ce9adaa5SChris Mason struct end_io_wq *end_io_wq = bio->bi_private; 657ce9adaa5SChris Mason struct btrfs_fs_info *fs_info; 658ce9adaa5SChris Mason 659ce9adaa5SChris Mason fs_info = end_io_wq->info; 660ce9adaa5SChris Mason end_io_wq->error = err; 6618b712842SChris Mason end_io_wq->work.func = end_workqueue_fn; 6628b712842SChris Mason end_io_wq->work.flags = 0; 663d20f7043SChris Mason 6647b6d91daSChristoph Hellwig if (bio->bi_rw & REQ_WRITE) { 6650cb59c99SJosef Bacik if (end_io_wq->metadata == 1) 666cad321adSChris Mason btrfs_queue_worker(&fs_info->endio_meta_write_workers, 667cad321adSChris Mason &end_io_wq->work); 6680cb59c99SJosef Bacik else if (end_io_wq->metadata == 2) 6690cb59c99SJosef Bacik btrfs_queue_worker(&fs_info->endio_freespace_worker, 6700cb59c99SJosef Bacik &end_io_wq->work); 671cad321adSChris Mason else 672e6dcd2dcSChris Mason btrfs_queue_worker(&fs_info->endio_write_workers, 673e6dcd2dcSChris Mason &end_io_wq->work); 674d20f7043SChris Mason } else { 675d20f7043SChris Mason if (end_io_wq->metadata) 676d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_meta_workers, 677d20f7043SChris Mason &end_io_wq->work); 678e6dcd2dcSChris Mason else 679d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_workers, 680d20f7043SChris Mason &end_io_wq->work); 681d20f7043SChris Mason } 682ce9adaa5SChris Mason } 683ce9adaa5SChris Mason 6840cb59c99SJosef Bacik /* 6850cb59c99SJosef Bacik * For the metadata arg you want 6860cb59c99SJosef Bacik * 6870cb59c99SJosef Bacik * 0 - if data 6880cb59c99SJosef Bacik * 1 - if normal metadta 6890cb59c99SJosef Bacik * 2 - if writing to the free space cache area 6900cb59c99SJosef Bacik */ 69122c59948SChris Mason int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, 69222c59948SChris Mason int metadata) 6930b86a832SChris Mason { 694ce9adaa5SChris Mason struct end_io_wq *end_io_wq; 695ce9adaa5SChris Mason end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); 696ce9adaa5SChris Mason if (!end_io_wq) 697ce9adaa5SChris Mason return -ENOMEM; 698ce9adaa5SChris Mason 699ce9adaa5SChris Mason end_io_wq->private = bio->bi_private; 700ce9adaa5SChris Mason end_io_wq->end_io = bio->bi_end_io; 70122c59948SChris Mason end_io_wq->info = info; 702ce9adaa5SChris Mason end_io_wq->error = 0; 703ce9adaa5SChris Mason end_io_wq->bio = bio; 70422c59948SChris Mason end_io_wq->metadata = metadata; 705ce9adaa5SChris Mason 706ce9adaa5SChris Mason bio->bi_private = end_io_wq; 707ce9adaa5SChris Mason bio->bi_end_io = end_workqueue_bio; 70822c59948SChris Mason return 0; 70922c59948SChris Mason } 71022c59948SChris Mason 711b64a2851SChris Mason unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) 7124854ddd0SChris Mason { 7134854ddd0SChris Mason unsigned long limit = min_t(unsigned long, 7144854ddd0SChris Mason info->workers.max_workers, 7154854ddd0SChris Mason info->fs_devices->open_devices); 7164854ddd0SChris Mason return 256 * limit; 7174854ddd0SChris Mason } 7184854ddd0SChris Mason 7194a69a410SChris Mason static void run_one_async_start(struct btrfs_work *work) 7204a69a410SChris Mason { 7214a69a410SChris Mason struct async_submit_bio *async; 7224a69a410SChris Mason 7234a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 7244a69a410SChris Mason async->submit_bio_start(async->inode, async->rw, async->bio, 725eaf25d93SChris Mason async->mirror_num, async->bio_flags, 726eaf25d93SChris Mason async->bio_offset); 7274a69a410SChris Mason } 7284a69a410SChris Mason 7294a69a410SChris Mason static void run_one_async_done(struct btrfs_work *work) 7308b712842SChris Mason { 7318b712842SChris Mason struct btrfs_fs_info *fs_info; 7328b712842SChris Mason struct async_submit_bio *async; 7334854ddd0SChris Mason int limit; 7348b712842SChris Mason 7358b712842SChris Mason async = container_of(work, struct async_submit_bio, work); 7368b712842SChris Mason fs_info = BTRFS_I(async->inode)->root->fs_info; 7374854ddd0SChris Mason 738b64a2851SChris Mason limit = btrfs_async_submit_limit(fs_info); 7394854ddd0SChris Mason limit = limit * 2 / 3; 7404854ddd0SChris Mason 7418b712842SChris Mason atomic_dec(&fs_info->nr_async_submits); 7420986fe9eSChris Mason 743b64a2851SChris Mason if (atomic_read(&fs_info->nr_async_submits) < limit && 744b64a2851SChris Mason waitqueue_active(&fs_info->async_submit_wait)) 7454854ddd0SChris Mason wake_up(&fs_info->async_submit_wait); 7464854ddd0SChris Mason 7474a69a410SChris Mason async->submit_bio_done(async->inode, async->rw, async->bio, 748eaf25d93SChris Mason async->mirror_num, async->bio_flags, 749eaf25d93SChris Mason async->bio_offset); 7504a69a410SChris Mason } 7514a69a410SChris Mason 7524a69a410SChris Mason static void run_one_async_free(struct btrfs_work *work) 7534a69a410SChris Mason { 7544a69a410SChris Mason struct async_submit_bio *async; 7554a69a410SChris Mason 7564a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 7578b712842SChris Mason kfree(async); 7588b712842SChris Mason } 7598b712842SChris Mason 76044b8bd7eSChris Mason int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, 76144b8bd7eSChris Mason int rw, struct bio *bio, int mirror_num, 762c8b97818SChris Mason unsigned long bio_flags, 763eaf25d93SChris Mason u64 bio_offset, 7644a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start, 7654a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done) 76644b8bd7eSChris Mason { 76744b8bd7eSChris Mason struct async_submit_bio *async; 76844b8bd7eSChris Mason 76944b8bd7eSChris Mason async = kmalloc(sizeof(*async), GFP_NOFS); 77044b8bd7eSChris Mason if (!async) 77144b8bd7eSChris Mason return -ENOMEM; 77244b8bd7eSChris Mason 77344b8bd7eSChris Mason async->inode = inode; 77444b8bd7eSChris Mason async->rw = rw; 77544b8bd7eSChris Mason async->bio = bio; 77644b8bd7eSChris Mason async->mirror_num = mirror_num; 7774a69a410SChris Mason async->submit_bio_start = submit_bio_start; 7784a69a410SChris Mason async->submit_bio_done = submit_bio_done; 7794a69a410SChris Mason 7804a69a410SChris Mason async->work.func = run_one_async_start; 7814a69a410SChris Mason async->work.ordered_func = run_one_async_done; 7824a69a410SChris Mason async->work.ordered_free = run_one_async_free; 7834a69a410SChris Mason 7848b712842SChris Mason async->work.flags = 0; 785c8b97818SChris Mason async->bio_flags = bio_flags; 786eaf25d93SChris Mason async->bio_offset = bio_offset; 7878c8bee1dSChris Mason 788cb03c743SChris Mason atomic_inc(&fs_info->nr_async_submits); 789d313d7a3SChris Mason 7907b6d91daSChristoph Hellwig if (rw & REQ_SYNC) 791d313d7a3SChris Mason btrfs_set_work_high_prio(&async->work); 792d313d7a3SChris Mason 7938b712842SChris Mason btrfs_queue_worker(&fs_info->workers, &async->work); 7949473f16cSChris Mason 795771ed689SChris Mason while (atomic_read(&fs_info->async_submit_draining) && 796771ed689SChris Mason atomic_read(&fs_info->nr_async_submits)) { 797771ed689SChris Mason wait_event(fs_info->async_submit_wait, 798771ed689SChris Mason (atomic_read(&fs_info->nr_async_submits) == 0)); 799771ed689SChris Mason } 800771ed689SChris Mason 80144b8bd7eSChris Mason return 0; 80244b8bd7eSChris Mason } 80344b8bd7eSChris Mason 804ce3ed71aSChris Mason static int btree_csum_one_bio(struct bio *bio) 805ce3ed71aSChris Mason { 806ce3ed71aSChris Mason struct bio_vec *bvec = bio->bi_io_vec; 807ce3ed71aSChris Mason int bio_index = 0; 808ce3ed71aSChris Mason struct btrfs_root *root; 809ce3ed71aSChris Mason 810ce3ed71aSChris Mason WARN_ON(bio->bi_vcnt <= 0); 811ce3ed71aSChris Mason while (bio_index < bio->bi_vcnt) { 812ce3ed71aSChris Mason root = BTRFS_I(bvec->bv_page->mapping->host)->root; 813ce3ed71aSChris Mason csum_dirty_buffer(root, bvec->bv_page); 814ce3ed71aSChris Mason bio_index++; 815ce3ed71aSChris Mason bvec++; 816ce3ed71aSChris Mason } 817ce3ed71aSChris Mason return 0; 818ce3ed71aSChris Mason } 819ce3ed71aSChris Mason 8204a69a410SChris Mason static int __btree_submit_bio_start(struct inode *inode, int rw, 8214a69a410SChris Mason struct bio *bio, int mirror_num, 822eaf25d93SChris Mason unsigned long bio_flags, 823eaf25d93SChris Mason u64 bio_offset) 82422c59948SChris Mason { 8258b712842SChris Mason /* 8268b712842SChris Mason * when we're called for a write, we're already in the async 8275443be45SChris Mason * submission context. Just jump into btrfs_map_bio 8288b712842SChris Mason */ 829ce3ed71aSChris Mason btree_csum_one_bio(bio); 8304a69a410SChris Mason return 0; 83122c59948SChris Mason } 83222c59948SChris Mason 8334a69a410SChris Mason static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, 834eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 835eaf25d93SChris Mason u64 bio_offset) 8364a69a410SChris Mason { 8378b712842SChris Mason /* 8384a69a410SChris Mason * when we're called for a write, we're already in the async 8394a69a410SChris Mason * submission context. Just jump into btrfs_map_bio 8408b712842SChris Mason */ 8418b712842SChris Mason return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); 8420b86a832SChris Mason } 8430b86a832SChris Mason 84444b8bd7eSChris Mason static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, 845eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 846eaf25d93SChris Mason u64 bio_offset) 84744b8bd7eSChris Mason { 8484a69a410SChris Mason int ret; 849cad321adSChris Mason 8504a69a410SChris Mason ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, 8514a69a410SChris Mason bio, 1); 8524a69a410SChris Mason BUG_ON(ret); 8534a69a410SChris Mason 8547b6d91daSChristoph Hellwig if (!(rw & REQ_WRITE)) { 855cad321adSChris Mason /* 856cad321adSChris Mason * called for a read, do the setup so that checksum validation 857cad321adSChris Mason * can happen in the async kernel threads 858cad321adSChris Mason */ 8594a69a410SChris Mason return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 8606f3577bdSChris Mason mirror_num, 0); 86144b8bd7eSChris Mason } 862d313d7a3SChris Mason 863cad321adSChris Mason /* 864cad321adSChris Mason * kthread helpers are used to submit writes so that checksumming 865cad321adSChris Mason * can happen in parallel across all CPUs 866cad321adSChris Mason */ 86744b8bd7eSChris Mason return btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, 868c8b97818SChris Mason inode, rw, bio, mirror_num, 0, 869eaf25d93SChris Mason bio_offset, 8704a69a410SChris Mason __btree_submit_bio_start, 8714a69a410SChris Mason __btree_submit_bio_done); 87244b8bd7eSChris Mason } 87344b8bd7eSChris Mason 8743dd1462eSJan Beulich #ifdef CONFIG_MIGRATION 875784b4e29SChris Mason static int btree_migratepage(struct address_space *mapping, 876784b4e29SChris Mason struct page *newpage, struct page *page) 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; 891784b4e29SChris Mason return migrate_page(mapping, newpage, page); 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 1111e089f05cSChris Mason int 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; 1123b9473439SChris Mason else 1124b9473439SChris Mason WARN_ON(1); 1125b9473439SChris Mason spin_unlock(&root->fs_info->delalloc_lock); 1126b9473439SChris Mason } 1127b4ce94deSChris Mason 1128b9473439SChris Mason /* ugh, clear_extent_buffer_dirty needs to lock the page */ 1129b9473439SChris Mason btrfs_set_lock_blocking(buf); 1130d1310b2eSChris Mason clear_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, 113155c69072SChris Mason buf); 1132925baeddSChris Mason } 11335f39d397SChris Mason return 0; 11345f39d397SChris Mason } 11355f39d397SChris Mason 1136db94535dSChris Mason static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, 113787ee04ebSChris Mason u32 stripesize, struct btrfs_root *root, 11389f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 1139e20d96d6SChris Mason u64 objectid) 1140d97e63b6SChris Mason { 1141cfaa7295SChris Mason root->node = NULL; 1142a28ec197SChris Mason root->commit_root = NULL; 1143db94535dSChris Mason root->sectorsize = sectorsize; 1144db94535dSChris Mason root->nodesize = nodesize; 1145db94535dSChris Mason root->leafsize = leafsize; 114687ee04ebSChris Mason root->stripesize = stripesize; 1147123abc88SChris Mason root->ref_cows = 0; 11480b86a832SChris Mason root->track_dirty = 0; 1149c71bf099SYan, Zheng root->in_radix = 0; 1150d68fc57bSYan, Zheng root->orphan_item_inserted = 0; 1151d68fc57bSYan, Zheng root->orphan_cleanup_state = 0; 11520b86a832SChris Mason 11539f5fae2fSChris Mason root->fs_info = fs_info; 11540f7d52f4SChris Mason root->objectid = objectid; 11550f7d52f4SChris Mason root->last_trans = 0; 115613a8a7c8SYan, Zheng root->highest_objectid = 0; 115758176a96SJosef Bacik root->name = NULL; 11586bef4d31SEric Paris root->inode_tree = RB_ROOT; 115916cdcec7SMiao Xie INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); 1160f0486c68SYan, Zheng root->block_rsv = NULL; 1161d68fc57bSYan, Zheng root->orphan_block_rsv = NULL; 11620b86a832SChris Mason 11630b86a832SChris Mason INIT_LIST_HEAD(&root->dirty_list); 11647b128766SJosef Bacik INIT_LIST_HEAD(&root->orphan_list); 11655d4f98a2SYan Zheng INIT_LIST_HEAD(&root->root_list); 1166d68fc57bSYan, Zheng spin_lock_init(&root->orphan_lock); 11675d4f98a2SYan Zheng spin_lock_init(&root->inode_lock); 1168f0486c68SYan, Zheng spin_lock_init(&root->accounting_lock); 1169a2135011SChris Mason mutex_init(&root->objectid_mutex); 1170e02119d5SChris Mason mutex_init(&root->log_mutex); 11717237f183SYan Zheng init_waitqueue_head(&root->log_writer_wait); 11727237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[0]); 11737237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[1]); 11747237f183SYan Zheng atomic_set(&root->log_commit[0], 0); 11757237f183SYan Zheng atomic_set(&root->log_commit[1], 0); 11767237f183SYan Zheng atomic_set(&root->log_writers, 0); 11777237f183SYan Zheng root->log_batch = 0; 11787237f183SYan Zheng root->log_transid = 0; 1179257c62e1SChris Mason root->last_log_commit = 0; 1180d0c803c4SChris Mason extent_io_tree_init(&root->dirty_log_pages, 1181f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 1182017e5369SChris Mason 11833768f368SChris Mason memset(&root->root_key, 0, sizeof(root->root_key)); 11843768f368SChris Mason memset(&root->root_item, 0, sizeof(root->root_item)); 11856702ed49SChris Mason memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); 118658176a96SJosef Bacik memset(&root->root_kobj, 0, sizeof(root->root_kobj)); 11873f157a2fSChris Mason root->defrag_trans_start = fs_info->generation; 118858176a96SJosef Bacik init_completion(&root->kobj_unregister); 11896702ed49SChris Mason root->defrag_running = 0; 11904d775673SChris Mason root->root_key.objectid = objectid; 11910ee5dc67SAl Viro root->anon_dev = 0; 11923768f368SChris Mason return 0; 11933768f368SChris Mason } 11943768f368SChris Mason 1195db94535dSChris Mason static int find_and_setup_root(struct btrfs_root *tree_root, 11969f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 11979f5fae2fSChris Mason u64 objectid, 1198e20d96d6SChris Mason struct btrfs_root *root) 11993768f368SChris Mason { 12003768f368SChris Mason int ret; 1201db94535dSChris Mason u32 blocksize; 120284234f3aSYan Zheng u64 generation; 12033768f368SChris Mason 1204db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 120587ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 120687ee04ebSChris Mason root, fs_info, objectid); 12073768f368SChris Mason ret = btrfs_find_last_root(tree_root, objectid, 12083768f368SChris Mason &root->root_item, &root->root_key); 12094df27c4dSYan, Zheng if (ret > 0) 12104df27c4dSYan, Zheng return -ENOENT; 12113768f368SChris Mason BUG_ON(ret); 12123768f368SChris Mason 121384234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1214db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1215af31f5e5SChris Mason root->commit_root = NULL; 1216db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 121784234f3aSYan Zheng blocksize, generation); 121868433b73SChris Mason if (!root->node || !btrfs_buffer_uptodate(root->node, generation)) { 121968433b73SChris Mason free_extent_buffer(root->node); 1220af31f5e5SChris Mason root->node = NULL; 122168433b73SChris Mason return -EIO; 122268433b73SChris Mason } 12234df27c4dSYan, Zheng root->commit_root = btrfs_root_node(root); 1224d97e63b6SChris Mason return 0; 1225d97e63b6SChris Mason } 1226d97e63b6SChris Mason 12277237f183SYan Zheng static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, 1228e02119d5SChris Mason struct btrfs_fs_info *fs_info) 12290f7d52f4SChris Mason { 12300f7d52f4SChris Mason struct btrfs_root *root; 12310f7d52f4SChris Mason struct btrfs_root *tree_root = fs_info->tree_root; 12327237f183SYan Zheng struct extent_buffer *leaf; 1233e02119d5SChris Mason 1234e02119d5SChris Mason root = kzalloc(sizeof(*root), GFP_NOFS); 1235e02119d5SChris Mason if (!root) 12367237f183SYan Zheng return ERR_PTR(-ENOMEM); 1237e02119d5SChris Mason 1238e02119d5SChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 1239e02119d5SChris Mason tree_root->sectorsize, tree_root->stripesize, 1240e02119d5SChris Mason root, fs_info, BTRFS_TREE_LOG_OBJECTID); 1241e02119d5SChris Mason 1242e02119d5SChris Mason root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 1243e02119d5SChris Mason root->root_key.type = BTRFS_ROOT_ITEM_KEY; 1244e02119d5SChris Mason root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 12457237f183SYan Zheng /* 12467237f183SYan Zheng * log trees do not get reference counted because they go away 12477237f183SYan Zheng * before a real commit is actually done. They do store pointers 12487237f183SYan Zheng * to file data extents, and those reference counts still get 12497237f183SYan Zheng * updated (along with back refs to the log tree). 12507237f183SYan Zheng */ 1251e02119d5SChris Mason root->ref_cows = 0; 1252e02119d5SChris Mason 12535d4f98a2SYan Zheng leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, 125466d7e7f0SArne Jansen BTRFS_TREE_LOG_OBJECTID, NULL, 125566d7e7f0SArne Jansen 0, 0, 0, 0); 12567237f183SYan Zheng if (IS_ERR(leaf)) { 12577237f183SYan Zheng kfree(root); 12587237f183SYan Zheng return ERR_CAST(leaf); 12597237f183SYan Zheng } 1260e02119d5SChris Mason 12615d4f98a2SYan Zheng memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 12625d4f98a2SYan Zheng btrfs_set_header_bytenr(leaf, leaf->start); 12635d4f98a2SYan Zheng btrfs_set_header_generation(leaf, trans->transid); 12645d4f98a2SYan Zheng btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 12655d4f98a2SYan Zheng btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); 12667237f183SYan Zheng root->node = leaf; 1267e02119d5SChris Mason 1268e02119d5SChris Mason write_extent_buffer(root->node, root->fs_info->fsid, 1269e02119d5SChris Mason (unsigned long)btrfs_header_fsid(root->node), 1270e02119d5SChris Mason BTRFS_FSID_SIZE); 1271e02119d5SChris Mason btrfs_mark_buffer_dirty(root->node); 1272e02119d5SChris Mason btrfs_tree_unlock(root->node); 12737237f183SYan Zheng return root; 12747237f183SYan Zheng } 12757237f183SYan Zheng 12767237f183SYan Zheng int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 12777237f183SYan Zheng struct btrfs_fs_info *fs_info) 12787237f183SYan Zheng { 12797237f183SYan Zheng struct btrfs_root *log_root; 12807237f183SYan Zheng 12817237f183SYan Zheng log_root = alloc_log_tree(trans, fs_info); 12827237f183SYan Zheng if (IS_ERR(log_root)) 12837237f183SYan Zheng return PTR_ERR(log_root); 12847237f183SYan Zheng WARN_ON(fs_info->log_root_tree); 12857237f183SYan Zheng fs_info->log_root_tree = log_root; 12867237f183SYan Zheng return 0; 12877237f183SYan Zheng } 12887237f183SYan Zheng 12897237f183SYan Zheng int btrfs_add_log_tree(struct btrfs_trans_handle *trans, 12907237f183SYan Zheng struct btrfs_root *root) 12917237f183SYan Zheng { 12927237f183SYan Zheng struct btrfs_root *log_root; 12937237f183SYan Zheng struct btrfs_inode_item *inode_item; 12947237f183SYan Zheng 12957237f183SYan Zheng log_root = alloc_log_tree(trans, root->fs_info); 12967237f183SYan Zheng if (IS_ERR(log_root)) 12977237f183SYan Zheng return PTR_ERR(log_root); 12987237f183SYan Zheng 12997237f183SYan Zheng log_root->last_trans = trans->transid; 13007237f183SYan Zheng log_root->root_key.offset = root->root_key.objectid; 13017237f183SYan Zheng 13027237f183SYan Zheng inode_item = &log_root->root_item.inode; 13037237f183SYan Zheng inode_item->generation = cpu_to_le64(1); 13047237f183SYan Zheng inode_item->size = cpu_to_le64(3); 13057237f183SYan Zheng inode_item->nlink = cpu_to_le32(1); 13067237f183SYan Zheng inode_item->nbytes = cpu_to_le64(root->leafsize); 13077237f183SYan Zheng inode_item->mode = cpu_to_le32(S_IFDIR | 0755); 13087237f183SYan Zheng 13095d4f98a2SYan Zheng btrfs_set_root_node(&log_root->root_item, log_root->node); 13107237f183SYan Zheng 13117237f183SYan Zheng WARN_ON(root->log_root); 13127237f183SYan Zheng root->log_root = log_root; 13137237f183SYan Zheng root->log_transid = 0; 1314257c62e1SChris Mason root->last_log_commit = 0; 1315e02119d5SChris Mason return 0; 1316e02119d5SChris Mason } 1317e02119d5SChris Mason 1318e02119d5SChris Mason struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, 1319e02119d5SChris Mason struct btrfs_key *location) 1320e02119d5SChris Mason { 1321e02119d5SChris Mason struct btrfs_root *root; 1322e02119d5SChris Mason struct btrfs_fs_info *fs_info = tree_root->fs_info; 13230f7d52f4SChris Mason struct btrfs_path *path; 13245f39d397SChris Mason struct extent_buffer *l; 132584234f3aSYan Zheng u64 generation; 1326db94535dSChris Mason u32 blocksize; 13270f7d52f4SChris Mason int ret = 0; 13280f7d52f4SChris Mason 13295eda7b5eSChris Mason root = kzalloc(sizeof(*root), GFP_NOFS); 13300cf6c620SChris Mason if (!root) 13310f7d52f4SChris Mason return ERR_PTR(-ENOMEM); 13320f7d52f4SChris Mason if (location->offset == (u64)-1) { 1333db94535dSChris Mason ret = find_and_setup_root(tree_root, fs_info, 13340f7d52f4SChris Mason location->objectid, root); 13350f7d52f4SChris Mason if (ret) { 13360f7d52f4SChris Mason kfree(root); 13370f7d52f4SChris Mason return ERR_PTR(ret); 13380f7d52f4SChris Mason } 133913a8a7c8SYan, Zheng goto out; 13400f7d52f4SChris Mason } 13410f7d52f4SChris Mason 1342db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 134387ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 134487ee04ebSChris Mason root, fs_info, location->objectid); 13450f7d52f4SChris Mason 13460f7d52f4SChris Mason path = btrfs_alloc_path(); 1347db5b493aSTsutomu Itoh if (!path) { 1348db5b493aSTsutomu Itoh kfree(root); 1349db5b493aSTsutomu Itoh return ERR_PTR(-ENOMEM); 1350db5b493aSTsutomu Itoh } 13510f7d52f4SChris Mason ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); 135213a8a7c8SYan, Zheng if (ret == 0) { 13535f39d397SChris Mason l = path->nodes[0]; 13545f39d397SChris Mason read_extent_buffer(l, &root->root_item, 13555f39d397SChris Mason btrfs_item_ptr_offset(l, path->slots[0]), 13560f7d52f4SChris Mason sizeof(root->root_item)); 135744b36eb2SYan Zheng memcpy(&root->root_key, location, sizeof(*location)); 135813a8a7c8SYan, Zheng } 13590f7d52f4SChris Mason btrfs_free_path(path); 13600f7d52f4SChris Mason if (ret) { 13615e540f77STsutomu Itoh kfree(root); 136213a8a7c8SYan, Zheng if (ret > 0) 136313a8a7c8SYan, Zheng ret = -ENOENT; 13640f7d52f4SChris Mason return ERR_PTR(ret); 13650f7d52f4SChris Mason } 136613a8a7c8SYan, Zheng 136784234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1368db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1369db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 137084234f3aSYan Zheng blocksize, generation); 13715d4f98a2SYan Zheng root->commit_root = btrfs_root_node(root); 13720f7d52f4SChris Mason BUG_ON(!root->node); 137313a8a7c8SYan, Zheng out: 137408fe4db1SLi Zefan if (location->objectid != BTRFS_TREE_LOG_OBJECTID) { 13750f7d52f4SChris Mason root->ref_cows = 1; 137608fe4db1SLi Zefan btrfs_check_and_init_root_item(&root->root_item); 137708fe4db1SLi Zefan } 137813a8a7c8SYan, Zheng 13795eda7b5eSChris Mason return root; 13805eda7b5eSChris Mason } 13815eda7b5eSChris Mason 1382edbd8d4eSChris Mason struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, 1383edbd8d4eSChris Mason struct btrfs_key *location) 13845eda7b5eSChris Mason { 13855eda7b5eSChris Mason struct btrfs_root *root; 13865eda7b5eSChris Mason int ret; 13875eda7b5eSChris Mason 1388edbd8d4eSChris Mason if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) 1389edbd8d4eSChris Mason return fs_info->tree_root; 1390edbd8d4eSChris Mason if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) 1391edbd8d4eSChris Mason return fs_info->extent_root; 13928f18cf13SChris Mason if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) 13938f18cf13SChris Mason return fs_info->chunk_root; 13948f18cf13SChris Mason if (location->objectid == BTRFS_DEV_TREE_OBJECTID) 13958f18cf13SChris Mason return fs_info->dev_root; 13960403e47eSYan Zheng if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) 13970403e47eSYan Zheng return fs_info->csum_root; 13984df27c4dSYan, Zheng again: 13994df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 14005eda7b5eSChris Mason root = radix_tree_lookup(&fs_info->fs_roots_radix, 14015eda7b5eSChris Mason (unsigned long)location->objectid); 14024df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 14035eda7b5eSChris Mason if (root) 14045eda7b5eSChris Mason return root; 14055eda7b5eSChris Mason 1406e02119d5SChris Mason root = btrfs_read_fs_root_no_radix(fs_info->tree_root, location); 14075eda7b5eSChris Mason if (IS_ERR(root)) 14085eda7b5eSChris Mason return root; 14093394e160SChris Mason 1410581bb050SLi Zefan root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); 1411581bb050SLi Zefan root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), 1412581bb050SLi Zefan GFP_NOFS); 141335a30d7cSDavid Sterba if (!root->free_ino_pinned || !root->free_ino_ctl) { 141435a30d7cSDavid Sterba ret = -ENOMEM; 1415581bb050SLi Zefan goto fail; 141635a30d7cSDavid Sterba } 1417581bb050SLi Zefan 1418581bb050SLi Zefan btrfs_init_free_ino_ctl(root); 1419581bb050SLi Zefan mutex_init(&root->fs_commit_mutex); 1420581bb050SLi Zefan spin_lock_init(&root->cache_lock); 1421581bb050SLi Zefan init_waitqueue_head(&root->cache_wait); 1422581bb050SLi Zefan 14230ee5dc67SAl Viro ret = get_anon_bdev(&root->anon_dev); 1424ac08aedfSChris Mason if (ret) 1425ac08aedfSChris Mason goto fail; 14263394e160SChris Mason 1427d68fc57bSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) { 1428d68fc57bSYan, Zheng ret = -ENOENT; 1429d68fc57bSYan, Zheng goto fail; 1430d68fc57bSYan, Zheng } 1431d68fc57bSYan, Zheng 1432d68fc57bSYan, Zheng ret = btrfs_find_orphan_item(fs_info->tree_root, location->objectid); 1433d68fc57bSYan, Zheng if (ret < 0) 1434d68fc57bSYan, Zheng goto fail; 1435d68fc57bSYan, Zheng if (ret == 0) 1436d68fc57bSYan, Zheng root->orphan_item_inserted = 1; 1437d68fc57bSYan, Zheng 14384df27c4dSYan, Zheng ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); 14394df27c4dSYan, Zheng if (ret) 14404df27c4dSYan, Zheng goto fail; 14414df27c4dSYan, Zheng 14424df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 14432619ba1fSChris Mason ret = radix_tree_insert(&fs_info->fs_roots_radix, 14442619ba1fSChris Mason (unsigned long)root->root_key.objectid, 14450f7d52f4SChris Mason root); 1446d68fc57bSYan, Zheng if (ret == 0) 14474df27c4dSYan, Zheng root->in_radix = 1; 1448d68fc57bSYan, Zheng 14494df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 14504df27c4dSYan, Zheng radix_tree_preload_end(); 14510f7d52f4SChris Mason if (ret) { 14524df27c4dSYan, Zheng if (ret == -EEXIST) { 14534df27c4dSYan, Zheng free_fs_root(root); 14544df27c4dSYan, Zheng goto again; 14550f7d52f4SChris Mason } 14564df27c4dSYan, Zheng goto fail; 14574df27c4dSYan, Zheng } 14584df27c4dSYan, Zheng 1459edbd8d4eSChris Mason ret = btrfs_find_dead_roots(fs_info->tree_root, 14605d4f98a2SYan Zheng root->root_key.objectid); 14614df27c4dSYan, Zheng WARN_ON(ret); 1462edbd8d4eSChris Mason return root; 14634df27c4dSYan, Zheng fail: 14644df27c4dSYan, Zheng free_fs_root(root); 14654df27c4dSYan, Zheng return ERR_PTR(ret); 1466edbd8d4eSChris Mason } 1467edbd8d4eSChris Mason 146804160088SChris Mason static int btrfs_congested_fn(void *congested_data, int bdi_bits) 146904160088SChris Mason { 147004160088SChris Mason struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; 147104160088SChris Mason int ret = 0; 147204160088SChris Mason struct btrfs_device *device; 147304160088SChris Mason struct backing_dev_info *bdi; 1474b7967db7SChris Mason 14751f78160cSXiao Guangrong rcu_read_lock(); 14761f78160cSXiao Guangrong list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { 1477dfe25020SChris Mason if (!device->bdev) 1478dfe25020SChris Mason continue; 147904160088SChris Mason bdi = blk_get_backing_dev_info(device->bdev); 148004160088SChris Mason if (bdi && bdi_congested(bdi, bdi_bits)) { 148104160088SChris Mason ret = 1; 148204160088SChris Mason break; 148304160088SChris Mason } 148404160088SChris Mason } 14851f78160cSXiao Guangrong rcu_read_unlock(); 148604160088SChris Mason return ret; 148704160088SChris Mason } 148804160088SChris Mason 148938b66988SChris Mason /* 1490ad081f14SJens Axboe * If this fails, caller must call bdi_destroy() to get rid of the 1491ad081f14SJens Axboe * bdi again. 1492ad081f14SJens Axboe */ 149304160088SChris Mason static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) 149404160088SChris Mason { 1495ad081f14SJens Axboe int err; 1496ad081f14SJens Axboe 1497ad081f14SJens Axboe bdi->capabilities = BDI_CAP_MAP_COPY; 1498e6d086d8SJens Axboe err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY); 1499ad081f14SJens Axboe if (err) 1500ad081f14SJens Axboe return err; 1501ad081f14SJens Axboe 15024575c9ccSChris Mason bdi->ra_pages = default_backing_dev_info.ra_pages; 150304160088SChris Mason bdi->congested_fn = btrfs_congested_fn; 150404160088SChris Mason bdi->congested_data = info; 150504160088SChris Mason return 0; 150604160088SChris Mason } 150704160088SChris Mason 1508ce9adaa5SChris Mason static int bio_ready_for_csum(struct bio *bio) 1509ce9adaa5SChris Mason { 1510ce9adaa5SChris Mason u64 length = 0; 1511ce9adaa5SChris Mason u64 buf_len = 0; 1512ce9adaa5SChris Mason u64 start = 0; 1513ce9adaa5SChris Mason struct page *page; 1514ce9adaa5SChris Mason struct extent_io_tree *io_tree = NULL; 1515ce9adaa5SChris Mason struct bio_vec *bvec; 1516ce9adaa5SChris Mason int i; 1517ce9adaa5SChris Mason int ret; 1518ce9adaa5SChris Mason 1519ce9adaa5SChris Mason bio_for_each_segment(bvec, bio, i) { 1520ce9adaa5SChris Mason page = bvec->bv_page; 1521ce9adaa5SChris Mason if (page->private == EXTENT_PAGE_PRIVATE) { 1522ce9adaa5SChris Mason length += bvec->bv_len; 1523ce9adaa5SChris Mason continue; 1524ce9adaa5SChris Mason } 1525ce9adaa5SChris Mason if (!page->private) { 1526ce9adaa5SChris Mason length += bvec->bv_len; 1527ce9adaa5SChris Mason continue; 1528ce9adaa5SChris Mason } 1529ce9adaa5SChris Mason length = bvec->bv_len; 1530ce9adaa5SChris Mason buf_len = page->private >> 2; 1531ce9adaa5SChris Mason start = page_offset(page) + bvec->bv_offset; 1532ce9adaa5SChris Mason io_tree = &BTRFS_I(page->mapping->host)->io_tree; 1533ce9adaa5SChris Mason } 1534ce9adaa5SChris Mason /* are we fully contained in this bio? */ 1535ce9adaa5SChris Mason if (buf_len <= length) 1536ce9adaa5SChris Mason return 1; 1537ce9adaa5SChris Mason 1538ce9adaa5SChris Mason ret = extent_range_uptodate(io_tree, start + length, 1539ce9adaa5SChris Mason start + buf_len - 1); 1540ce9adaa5SChris Mason return ret; 1541ce9adaa5SChris Mason } 1542ce9adaa5SChris Mason 15438b712842SChris Mason /* 15448b712842SChris Mason * called by the kthread helper functions to finally call the bio end_io 15458b712842SChris Mason * functions. This is where read checksum verification actually happens 15468b712842SChris Mason */ 15478b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work) 1548ce9adaa5SChris Mason { 1549ce9adaa5SChris Mason struct bio *bio; 15508b712842SChris Mason struct end_io_wq *end_io_wq; 15518b712842SChris Mason struct btrfs_fs_info *fs_info; 1552ce9adaa5SChris Mason int error; 1553ce9adaa5SChris Mason 15548b712842SChris Mason end_io_wq = container_of(work, struct end_io_wq, work); 1555ce9adaa5SChris Mason bio = end_io_wq->bio; 15568b712842SChris Mason fs_info = end_io_wq->info; 15578b712842SChris Mason 1558cad321adSChris Mason /* metadata bio reads are special because the whole tree block must 15598b712842SChris Mason * be checksummed at once. This makes sure the entire block is in 15608b712842SChris Mason * ram and up to date before trying to verify things. For 15618b712842SChris Mason * blocksize <= pagesize, it is basically a noop 15628b712842SChris Mason */ 15637b6d91daSChristoph Hellwig if (!(bio->bi_rw & REQ_WRITE) && end_io_wq->metadata && 1564cad321adSChris Mason !bio_ready_for_csum(bio)) { 1565d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_meta_workers, 15668b712842SChris Mason &end_io_wq->work); 1567ce9adaa5SChris Mason return; 1568ce9adaa5SChris Mason } 1569ce9adaa5SChris Mason error = end_io_wq->error; 1570ce9adaa5SChris Mason bio->bi_private = end_io_wq->private; 1571ce9adaa5SChris Mason bio->bi_end_io = end_io_wq->end_io; 1572ce9adaa5SChris Mason kfree(end_io_wq); 1573ce9adaa5SChris Mason bio_endio(bio, error); 1574ce9adaa5SChris Mason } 157544b8bd7eSChris Mason 1576a74a4b97SChris Mason static int cleaner_kthread(void *arg) 1577a74a4b97SChris Mason { 1578a74a4b97SChris Mason struct btrfs_root *root = arg; 1579a74a4b97SChris Mason 1580a74a4b97SChris Mason do { 1581a74a4b97SChris Mason vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE); 158276dda93cSYan, Zheng 158376dda93cSYan, Zheng if (!(root->fs_info->sb->s_flags & MS_RDONLY) && 158476dda93cSYan, Zheng mutex_trylock(&root->fs_info->cleaner_mutex)) { 158524bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 1586a74a4b97SChris Mason btrfs_clean_old_snapshots(root); 1587a74a4b97SChris Mason mutex_unlock(&root->fs_info->cleaner_mutex); 15884cb5300bSChris Mason btrfs_run_defrag_inodes(root->fs_info); 158976dda93cSYan, Zheng } 1590a74a4b97SChris Mason 1591a74a4b97SChris Mason if (freezing(current)) { 1592a74a4b97SChris Mason refrigerator(); 1593a74a4b97SChris Mason } else { 1594a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 15958929ecfaSYan, Zheng if (!kthread_should_stop()) 1596a74a4b97SChris Mason schedule(); 1597a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1598a74a4b97SChris Mason } 1599a74a4b97SChris Mason } while (!kthread_should_stop()); 1600a74a4b97SChris Mason return 0; 1601a74a4b97SChris Mason } 1602a74a4b97SChris Mason 1603a74a4b97SChris Mason static int transaction_kthread(void *arg) 1604a74a4b97SChris Mason { 1605a74a4b97SChris Mason struct btrfs_root *root = arg; 1606a74a4b97SChris Mason struct btrfs_trans_handle *trans; 1607a74a4b97SChris Mason struct btrfs_transaction *cur; 16088929ecfaSYan, Zheng u64 transid; 1609a74a4b97SChris Mason unsigned long now; 1610a74a4b97SChris Mason unsigned long delay; 1611a74a4b97SChris Mason int ret; 1612a74a4b97SChris Mason 1613a74a4b97SChris Mason do { 1614a74a4b97SChris Mason delay = HZ * 30; 1615a74a4b97SChris Mason vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE); 1616a74a4b97SChris Mason mutex_lock(&root->fs_info->transaction_kthread_mutex); 1617a74a4b97SChris Mason 1618a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 1619a74a4b97SChris Mason cur = root->fs_info->running_transaction; 1620a74a4b97SChris Mason if (!cur) { 1621a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1622a74a4b97SChris Mason goto sleep; 1623a74a4b97SChris Mason } 162431153d81SYan Zheng 1625a74a4b97SChris Mason now = get_seconds(); 16268929ecfaSYan, Zheng if (!cur->blocked && 16278929ecfaSYan, Zheng (now < cur->start_time || now - cur->start_time < 30)) { 1628a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1629a74a4b97SChris Mason delay = HZ * 5; 1630a74a4b97SChris Mason goto sleep; 1631a74a4b97SChris Mason } 16328929ecfaSYan, Zheng transid = cur->transid; 1633a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 163456bec294SChris Mason 16357a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 16363612b495STsutomu Itoh BUG_ON(IS_ERR(trans)); 16378929ecfaSYan, Zheng if (transid == trans->transid) { 16388929ecfaSYan, Zheng ret = btrfs_commit_transaction(trans, root); 16398929ecfaSYan, Zheng BUG_ON(ret); 16408929ecfaSYan, Zheng } else { 16418929ecfaSYan, Zheng btrfs_end_transaction(trans, root); 16428929ecfaSYan, Zheng } 1643a74a4b97SChris Mason sleep: 1644a74a4b97SChris Mason wake_up_process(root->fs_info->cleaner_kthread); 1645a74a4b97SChris Mason mutex_unlock(&root->fs_info->transaction_kthread_mutex); 1646a74a4b97SChris Mason 1647a74a4b97SChris Mason if (freezing(current)) { 1648a74a4b97SChris Mason refrigerator(); 1649a74a4b97SChris Mason } else { 1650a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 16518929ecfaSYan, Zheng if (!kthread_should_stop() && 16528929ecfaSYan, Zheng !btrfs_transaction_blocked(root->fs_info)) 1653a74a4b97SChris Mason schedule_timeout(delay); 1654a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1655a74a4b97SChris Mason } 1656a74a4b97SChris Mason } while (!kthread_should_stop()); 1657a74a4b97SChris Mason return 0; 1658a74a4b97SChris Mason } 1659a74a4b97SChris Mason 1660af31f5e5SChris Mason /* 1661af31f5e5SChris Mason * this will find the highest generation in the array of 1662af31f5e5SChris Mason * root backups. The index of the highest array is returned, 1663af31f5e5SChris Mason * or -1 if we can't find anything. 1664af31f5e5SChris Mason * 1665af31f5e5SChris Mason * We check to make sure the array is valid by comparing the 1666af31f5e5SChris Mason * generation of the latest root in the array with the generation 1667af31f5e5SChris Mason * in the super block. If they don't match we pitch it. 1668af31f5e5SChris Mason */ 1669af31f5e5SChris Mason static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) 1670af31f5e5SChris Mason { 1671af31f5e5SChris Mason u64 cur; 1672af31f5e5SChris Mason int newest_index = -1; 1673af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1674af31f5e5SChris Mason int i; 1675af31f5e5SChris Mason 1676af31f5e5SChris Mason for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 1677af31f5e5SChris Mason root_backup = info->super_copy->super_roots + i; 1678af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1679af31f5e5SChris Mason if (cur == newest_gen) 1680af31f5e5SChris Mason newest_index = i; 1681af31f5e5SChris Mason } 1682af31f5e5SChris Mason 1683af31f5e5SChris Mason /* check to see if we actually wrapped around */ 1684af31f5e5SChris Mason if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { 1685af31f5e5SChris Mason root_backup = info->super_copy->super_roots; 1686af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1687af31f5e5SChris Mason if (cur == newest_gen) 1688af31f5e5SChris Mason newest_index = 0; 1689af31f5e5SChris Mason } 1690af31f5e5SChris Mason return newest_index; 1691af31f5e5SChris Mason } 1692af31f5e5SChris Mason 1693af31f5e5SChris Mason 1694af31f5e5SChris Mason /* 1695af31f5e5SChris Mason * find the oldest backup so we know where to store new entries 1696af31f5e5SChris Mason * in the backup array. This will set the backup_root_index 1697af31f5e5SChris Mason * field in the fs_info struct 1698af31f5e5SChris Mason */ 1699af31f5e5SChris Mason static void find_oldest_super_backup(struct btrfs_fs_info *info, 1700af31f5e5SChris Mason u64 newest_gen) 1701af31f5e5SChris Mason { 1702af31f5e5SChris Mason int newest_index = -1; 1703af31f5e5SChris Mason 1704af31f5e5SChris Mason newest_index = find_newest_super_backup(info, newest_gen); 1705af31f5e5SChris Mason /* if there was garbage in there, just move along */ 1706af31f5e5SChris Mason if (newest_index == -1) { 1707af31f5e5SChris Mason info->backup_root_index = 0; 1708af31f5e5SChris Mason } else { 1709af31f5e5SChris Mason info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; 1710af31f5e5SChris Mason } 1711af31f5e5SChris Mason } 1712af31f5e5SChris Mason 1713af31f5e5SChris Mason /* 1714af31f5e5SChris Mason * copy all the root pointers into the super backup array. 1715af31f5e5SChris Mason * this will bump the backup pointer by one when it is 1716af31f5e5SChris Mason * done 1717af31f5e5SChris Mason */ 1718af31f5e5SChris Mason static void backup_super_roots(struct btrfs_fs_info *info) 1719af31f5e5SChris Mason { 1720af31f5e5SChris Mason int next_backup; 1721af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1722af31f5e5SChris Mason int last_backup; 1723af31f5e5SChris Mason 1724af31f5e5SChris Mason next_backup = info->backup_root_index; 1725af31f5e5SChris Mason last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % 1726af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1727af31f5e5SChris Mason 1728af31f5e5SChris Mason /* 1729af31f5e5SChris Mason * just overwrite the last backup if we're at the same generation 1730af31f5e5SChris Mason * this happens only at umount 1731af31f5e5SChris Mason */ 1732af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + last_backup; 1733af31f5e5SChris Mason if (btrfs_backup_tree_root_gen(root_backup) == 1734af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)) 1735af31f5e5SChris Mason next_backup = last_backup; 1736af31f5e5SChris Mason 1737af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + next_backup; 1738af31f5e5SChris Mason 1739af31f5e5SChris Mason /* 1740af31f5e5SChris Mason * make sure all of our padding and empty slots get zero filled 1741af31f5e5SChris Mason * regardless of which ones we use today 1742af31f5e5SChris Mason */ 1743af31f5e5SChris Mason memset(root_backup, 0, sizeof(*root_backup)); 1744af31f5e5SChris Mason 1745af31f5e5SChris Mason info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; 1746af31f5e5SChris Mason 1747af31f5e5SChris Mason btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); 1748af31f5e5SChris Mason btrfs_set_backup_tree_root_gen(root_backup, 1749af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)); 1750af31f5e5SChris Mason 1751af31f5e5SChris Mason btrfs_set_backup_tree_root_level(root_backup, 1752af31f5e5SChris Mason btrfs_header_level(info->tree_root->node)); 1753af31f5e5SChris Mason 1754af31f5e5SChris Mason btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); 1755af31f5e5SChris Mason btrfs_set_backup_chunk_root_gen(root_backup, 1756af31f5e5SChris Mason btrfs_header_generation(info->chunk_root->node)); 1757af31f5e5SChris Mason btrfs_set_backup_chunk_root_level(root_backup, 1758af31f5e5SChris Mason btrfs_header_level(info->chunk_root->node)); 1759af31f5e5SChris Mason 1760af31f5e5SChris Mason btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); 1761af31f5e5SChris Mason btrfs_set_backup_extent_root_gen(root_backup, 1762af31f5e5SChris Mason btrfs_header_generation(info->extent_root->node)); 1763af31f5e5SChris Mason btrfs_set_backup_extent_root_level(root_backup, 1764af31f5e5SChris Mason btrfs_header_level(info->extent_root->node)); 1765af31f5e5SChris Mason 17667c7e82a7SChris Mason /* 17677c7e82a7SChris Mason * we might commit during log recovery, which happens before we set 17687c7e82a7SChris Mason * the fs_root. Make sure it is valid before we fill it in. 17697c7e82a7SChris Mason */ 17707c7e82a7SChris Mason if (info->fs_root && info->fs_root->node) { 17717c7e82a7SChris Mason btrfs_set_backup_fs_root(root_backup, 17727c7e82a7SChris Mason info->fs_root->node->start); 1773af31f5e5SChris Mason btrfs_set_backup_fs_root_gen(root_backup, 1774af31f5e5SChris Mason btrfs_header_generation(info->fs_root->node)); 1775af31f5e5SChris Mason btrfs_set_backup_fs_root_level(root_backup, 1776af31f5e5SChris Mason btrfs_header_level(info->fs_root->node)); 17777c7e82a7SChris Mason } 1778af31f5e5SChris Mason 1779af31f5e5SChris Mason btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); 1780af31f5e5SChris Mason btrfs_set_backup_dev_root_gen(root_backup, 1781af31f5e5SChris Mason btrfs_header_generation(info->dev_root->node)); 1782af31f5e5SChris Mason btrfs_set_backup_dev_root_level(root_backup, 1783af31f5e5SChris Mason btrfs_header_level(info->dev_root->node)); 1784af31f5e5SChris Mason 1785af31f5e5SChris Mason btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); 1786af31f5e5SChris Mason btrfs_set_backup_csum_root_gen(root_backup, 1787af31f5e5SChris Mason btrfs_header_generation(info->csum_root->node)); 1788af31f5e5SChris Mason btrfs_set_backup_csum_root_level(root_backup, 1789af31f5e5SChris Mason btrfs_header_level(info->csum_root->node)); 1790af31f5e5SChris Mason 1791af31f5e5SChris Mason btrfs_set_backup_total_bytes(root_backup, 1792af31f5e5SChris Mason btrfs_super_total_bytes(info->super_copy)); 1793af31f5e5SChris Mason btrfs_set_backup_bytes_used(root_backup, 1794af31f5e5SChris Mason btrfs_super_bytes_used(info->super_copy)); 1795af31f5e5SChris Mason btrfs_set_backup_num_devices(root_backup, 1796af31f5e5SChris Mason btrfs_super_num_devices(info->super_copy)); 1797af31f5e5SChris Mason 1798af31f5e5SChris Mason /* 1799af31f5e5SChris Mason * if we don't copy this out to the super_copy, it won't get remembered 1800af31f5e5SChris Mason * for the next commit 1801af31f5e5SChris Mason */ 1802af31f5e5SChris Mason memcpy(&info->super_copy->super_roots, 1803af31f5e5SChris Mason &info->super_for_commit->super_roots, 1804af31f5e5SChris Mason sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); 1805af31f5e5SChris Mason } 1806af31f5e5SChris Mason 1807af31f5e5SChris Mason /* 1808af31f5e5SChris Mason * this copies info out of the root backup array and back into 1809af31f5e5SChris Mason * the in-memory super block. It is meant to help iterate through 1810af31f5e5SChris Mason * the array, so you send it the number of backups you've already 1811af31f5e5SChris Mason * tried and the last backup index you used. 1812af31f5e5SChris Mason * 1813af31f5e5SChris Mason * this returns -1 when it has tried all the backups 1814af31f5e5SChris Mason */ 1815af31f5e5SChris Mason static noinline int next_root_backup(struct btrfs_fs_info *info, 1816af31f5e5SChris Mason struct btrfs_super_block *super, 1817af31f5e5SChris Mason int *num_backups_tried, int *backup_index) 1818af31f5e5SChris Mason { 1819af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1820af31f5e5SChris Mason int newest = *backup_index; 1821af31f5e5SChris Mason 1822af31f5e5SChris Mason if (*num_backups_tried == 0) { 1823af31f5e5SChris Mason u64 gen = btrfs_super_generation(super); 1824af31f5e5SChris Mason 1825af31f5e5SChris Mason newest = find_newest_super_backup(info, gen); 1826af31f5e5SChris Mason if (newest == -1) 1827af31f5e5SChris Mason return -1; 1828af31f5e5SChris Mason 1829af31f5e5SChris Mason *backup_index = newest; 1830af31f5e5SChris Mason *num_backups_tried = 1; 1831af31f5e5SChris Mason } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { 1832af31f5e5SChris Mason /* we've tried all the backups, all done */ 1833af31f5e5SChris Mason return -1; 1834af31f5e5SChris Mason } else { 1835af31f5e5SChris Mason /* jump to the next oldest backup */ 1836af31f5e5SChris Mason newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % 1837af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1838af31f5e5SChris Mason *backup_index = newest; 1839af31f5e5SChris Mason *num_backups_tried += 1; 1840af31f5e5SChris Mason } 1841af31f5e5SChris Mason root_backup = super->super_roots + newest; 1842af31f5e5SChris Mason 1843af31f5e5SChris Mason btrfs_set_super_generation(super, 1844af31f5e5SChris Mason btrfs_backup_tree_root_gen(root_backup)); 1845af31f5e5SChris Mason btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); 1846af31f5e5SChris Mason btrfs_set_super_root_level(super, 1847af31f5e5SChris Mason btrfs_backup_tree_root_level(root_backup)); 1848af31f5e5SChris Mason btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); 1849af31f5e5SChris Mason 1850af31f5e5SChris Mason /* 1851af31f5e5SChris Mason * fixme: the total bytes and num_devices need to match or we should 1852af31f5e5SChris Mason * need a fsck 1853af31f5e5SChris Mason */ 1854af31f5e5SChris Mason btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); 1855af31f5e5SChris Mason btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); 1856af31f5e5SChris Mason return 0; 1857af31f5e5SChris Mason } 1858af31f5e5SChris Mason 1859af31f5e5SChris Mason /* helper to cleanup tree roots */ 1860af31f5e5SChris Mason static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) 1861af31f5e5SChris Mason { 1862af31f5e5SChris Mason free_extent_buffer(info->tree_root->node); 1863af31f5e5SChris Mason free_extent_buffer(info->tree_root->commit_root); 1864af31f5e5SChris Mason free_extent_buffer(info->dev_root->node); 1865af31f5e5SChris Mason free_extent_buffer(info->dev_root->commit_root); 1866af31f5e5SChris Mason free_extent_buffer(info->extent_root->node); 1867af31f5e5SChris Mason free_extent_buffer(info->extent_root->commit_root); 1868af31f5e5SChris Mason free_extent_buffer(info->csum_root->node); 1869af31f5e5SChris Mason free_extent_buffer(info->csum_root->commit_root); 1870af31f5e5SChris Mason 1871af31f5e5SChris Mason info->tree_root->node = NULL; 1872af31f5e5SChris Mason info->tree_root->commit_root = NULL; 1873af31f5e5SChris Mason info->dev_root->node = NULL; 1874af31f5e5SChris Mason info->dev_root->commit_root = NULL; 1875af31f5e5SChris Mason info->extent_root->node = NULL; 1876af31f5e5SChris Mason info->extent_root->commit_root = NULL; 1877af31f5e5SChris Mason info->csum_root->node = NULL; 1878af31f5e5SChris Mason info->csum_root->commit_root = NULL; 1879af31f5e5SChris Mason 1880af31f5e5SChris Mason if (chunk_root) { 1881af31f5e5SChris Mason free_extent_buffer(info->chunk_root->node); 1882af31f5e5SChris Mason free_extent_buffer(info->chunk_root->commit_root); 1883af31f5e5SChris Mason info->chunk_root->node = NULL; 1884af31f5e5SChris Mason info->chunk_root->commit_root = NULL; 1885af31f5e5SChris Mason } 1886af31f5e5SChris Mason } 1887af31f5e5SChris Mason 1888af31f5e5SChris Mason 18898a4b83ccSChris Mason struct btrfs_root *open_ctree(struct super_block *sb, 1890dfe25020SChris Mason struct btrfs_fs_devices *fs_devices, 1891dfe25020SChris Mason char *options) 1892eb60ceacSChris Mason { 1893db94535dSChris Mason u32 sectorsize; 1894db94535dSChris Mason u32 nodesize; 1895db94535dSChris Mason u32 leafsize; 1896db94535dSChris Mason u32 blocksize; 189787ee04ebSChris Mason u32 stripesize; 189884234f3aSYan Zheng u64 generation; 1899f2b636e8SJosef Bacik u64 features; 19003de4586cSChris Mason struct btrfs_key location; 1901a061fc8dSChris Mason struct buffer_head *bh; 19024d34b278SIlya Dryomov struct btrfs_super_block *disk_super; 1903450ba0eaSJosef Bacik struct btrfs_root *tree_root = btrfs_sb(sb); 19044d34b278SIlya Dryomov struct btrfs_fs_info *fs_info = tree_root->fs_info; 19054d34b278SIlya Dryomov struct btrfs_root *extent_root; 19064d34b278SIlya Dryomov struct btrfs_root *csum_root; 19074d34b278SIlya Dryomov struct btrfs_root *chunk_root; 19084d34b278SIlya Dryomov struct btrfs_root *dev_root; 1909e02119d5SChris Mason struct btrfs_root *log_tree_root; 1910eb60ceacSChris Mason int ret; 1911e58ca020SYan int err = -EINVAL; 1912af31f5e5SChris Mason int num_backups_tried = 0; 1913af31f5e5SChris Mason int backup_index = 0; 19144543df7eSChris Mason 19154d34b278SIlya Dryomov extent_root = fs_info->extent_root = 19164d34b278SIlya Dryomov kzalloc(sizeof(struct btrfs_root), GFP_NOFS); 19174d34b278SIlya Dryomov csum_root = fs_info->csum_root = 19184d34b278SIlya Dryomov kzalloc(sizeof(struct btrfs_root), GFP_NOFS); 19194d34b278SIlya Dryomov chunk_root = fs_info->chunk_root = 19204d34b278SIlya Dryomov kzalloc(sizeof(struct btrfs_root), GFP_NOFS); 19214d34b278SIlya Dryomov dev_root = fs_info->dev_root = 19224d34b278SIlya Dryomov kzalloc(sizeof(struct btrfs_root), GFP_NOFS); 19238790d502SChris Mason 19244d34b278SIlya Dryomov if (!extent_root || !csum_root || !chunk_root || !dev_root) { 192539279cc3SChris Mason err = -ENOMEM; 192639279cc3SChris Mason goto fail; 192739279cc3SChris Mason } 192876dda93cSYan, Zheng 192976dda93cSYan, Zheng ret = init_srcu_struct(&fs_info->subvol_srcu); 193076dda93cSYan, Zheng if (ret) { 193176dda93cSYan, Zheng err = ret; 193276dda93cSYan, Zheng goto fail; 193376dda93cSYan, Zheng } 193476dda93cSYan, Zheng 193576dda93cSYan, Zheng ret = setup_bdi(fs_info, &fs_info->bdi); 193676dda93cSYan, Zheng if (ret) { 193776dda93cSYan, Zheng err = ret; 193876dda93cSYan, Zheng goto fail_srcu; 193976dda93cSYan, Zheng } 194076dda93cSYan, Zheng 194176dda93cSYan, Zheng fs_info->btree_inode = new_inode(sb); 194276dda93cSYan, Zheng if (!fs_info->btree_inode) { 194376dda93cSYan, Zheng err = -ENOMEM; 194476dda93cSYan, Zheng goto fail_bdi; 194576dda93cSYan, Zheng } 194676dda93cSYan, Zheng 1947a6591715SChris Mason mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); 19481561dedaSMiao Xie 194976dda93cSYan, Zheng INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 19508fd17795SChris Mason INIT_LIST_HEAD(&fs_info->trans_list); 1951facda1e7SChris Mason INIT_LIST_HEAD(&fs_info->dead_roots); 195224bbcf04SYan, Zheng INIT_LIST_HEAD(&fs_info->delayed_iputs); 195319c00ddcSChris Mason INIT_LIST_HEAD(&fs_info->hashers); 1954ea8c2819SChris Mason INIT_LIST_HEAD(&fs_info->delalloc_inodes); 19555a3f23d5SChris Mason INIT_LIST_HEAD(&fs_info->ordered_operations); 195611833d66SYan Zheng INIT_LIST_HEAD(&fs_info->caching_block_groups); 19571832a6d5SChris Mason spin_lock_init(&fs_info->delalloc_lock); 1958a4abeea4SJosef Bacik spin_lock_init(&fs_info->trans_lock); 195931153d81SYan Zheng spin_lock_init(&fs_info->ref_cache_lock); 196076dda93cSYan, Zheng spin_lock_init(&fs_info->fs_roots_radix_lock); 196124bbcf04SYan, Zheng spin_lock_init(&fs_info->delayed_iput_lock); 19624cb5300bSChris Mason spin_lock_init(&fs_info->defrag_inodes_lock); 19632bf64758SJosef Bacik spin_lock_init(&fs_info->free_chunk_lock); 19647585717fSChris Mason mutex_init(&fs_info->reloc_mutex); 196519c00ddcSChris Mason 196658176a96SJosef Bacik init_completion(&fs_info->kobj_unregister); 19670b86a832SChris Mason INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); 19686324fbf3SChris Mason INIT_LIST_HEAD(&fs_info->space_info); 19690b86a832SChris Mason btrfs_mapping_init(&fs_info->mapping_tree); 1970f0486c68SYan, Zheng btrfs_init_block_rsv(&fs_info->global_block_rsv); 1971f0486c68SYan, Zheng btrfs_init_block_rsv(&fs_info->delalloc_block_rsv); 1972f0486c68SYan, Zheng btrfs_init_block_rsv(&fs_info->trans_block_rsv); 1973f0486c68SYan, Zheng btrfs_init_block_rsv(&fs_info->chunk_block_rsv); 1974f0486c68SYan, Zheng btrfs_init_block_rsv(&fs_info->empty_block_rsv); 19756d668ddaSJosef Bacik btrfs_init_block_rsv(&fs_info->delayed_block_rsv); 1976cb03c743SChris Mason atomic_set(&fs_info->nr_async_submits, 0); 1977771ed689SChris Mason atomic_set(&fs_info->async_delalloc_pages, 0); 19788c8bee1dSChris Mason atomic_set(&fs_info->async_submit_draining, 0); 19790986fe9eSChris Mason atomic_set(&fs_info->nr_async_bios, 0); 19804cb5300bSChris Mason atomic_set(&fs_info->defrag_running, 0); 1981e20d96d6SChris Mason fs_info->sb = sb; 19826f568d35SChris Mason fs_info->max_inline = 8192 * 1024; 19839ed74f2dSJosef Bacik fs_info->metadata_ratio = 0; 19844cb5300bSChris Mason fs_info->defrag_inodes = RB_ROOT; 1985a4abeea4SJosef Bacik fs_info->trans_no_join = 0; 19862bf64758SJosef Bacik fs_info->free_chunk_space = 0; 1987c8b97818SChris Mason 198890519d66SArne Jansen /* readahead state */ 198990519d66SArne Jansen INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT); 199090519d66SArne Jansen spin_lock_init(&fs_info->reada_lock); 19912c90e5d6SChris Mason 1992b34b086cSChris Mason fs_info->thread_pool_size = min_t(unsigned long, 1993b34b086cSChris Mason num_online_cpus() + 2, 8); 19940afbaf8cSChris Mason 19953eaa2885SChris Mason INIT_LIST_HEAD(&fs_info->ordered_extents); 19963eaa2885SChris Mason spin_lock_init(&fs_info->ordered_extent_lock); 199716cdcec7SMiao Xie fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), 199816cdcec7SMiao Xie GFP_NOFS); 199916cdcec7SMiao Xie if (!fs_info->delayed_root) { 200016cdcec7SMiao Xie err = -ENOMEM; 200116cdcec7SMiao Xie goto fail_iput; 200216cdcec7SMiao Xie } 200316cdcec7SMiao Xie btrfs_init_delayed_root(fs_info->delayed_root); 20043eaa2885SChris Mason 2005a2de733cSArne Jansen mutex_init(&fs_info->scrub_lock); 2006a2de733cSArne Jansen atomic_set(&fs_info->scrubs_running, 0); 2007a2de733cSArne Jansen atomic_set(&fs_info->scrub_pause_req, 0); 2008a2de733cSArne Jansen atomic_set(&fs_info->scrubs_paused, 0); 2009a2de733cSArne Jansen atomic_set(&fs_info->scrub_cancel_req, 0); 2010a2de733cSArne Jansen init_waitqueue_head(&fs_info->scrub_pause_wait); 2011a2de733cSArne Jansen init_rwsem(&fs_info->scrub_super_lock); 2012a2de733cSArne Jansen fs_info->scrub_workers_refcnt = 0; 201321adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 201421adbd5cSStefan Behrens fs_info->check_integrity_print_mask = 0; 201521adbd5cSStefan Behrens #endif 2016a2de733cSArne Jansen 2017c9e9f97bSIlya Dryomov spin_lock_init(&fs_info->balance_lock); 2018c9e9f97bSIlya Dryomov mutex_init(&fs_info->balance_mutex); 2019837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_running, 0); 2020837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_pause_req, 0); 2021a7e99c69SIlya Dryomov atomic_set(&fs_info->balance_cancel_req, 0); 2022c9e9f97bSIlya Dryomov fs_info->balance_ctl = NULL; 2023837d5b6eSIlya Dryomov init_waitqueue_head(&fs_info->balance_wait_q); 2024c9e9f97bSIlya Dryomov 2025a061fc8dSChris Mason sb->s_blocksize = 4096; 2026a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(4096); 202732a88aa1SJens Axboe sb->s_bdi = &fs_info->bdi; 2028a061fc8dSChris Mason 202976dda93cSYan, Zheng fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; 2030bfe86848SMiklos Szeredi set_nlink(fs_info->btree_inode, 1); 20310afbaf8cSChris Mason /* 20320afbaf8cSChris Mason * we set the i_size on the btree inode to the max possible int. 20330afbaf8cSChris Mason * the real end of the address space is determined by all of 20340afbaf8cSChris Mason * the devices in the system 20350afbaf8cSChris Mason */ 20360afbaf8cSChris Mason fs_info->btree_inode->i_size = OFFSET_MAX; 2037d98237b3SChris Mason fs_info->btree_inode->i_mapping->a_ops = &btree_aops; 203804160088SChris Mason fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; 203904160088SChris Mason 20405d4f98a2SYan Zheng RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); 2041d1310b2eSChris Mason extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, 2042f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 2043a8067e02SDavid Sterba extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); 20440da5468fSChris Mason 2045d1310b2eSChris Mason BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; 2046d1310b2eSChris Mason 20470f7d52f4SChris Mason BTRFS_I(fs_info->btree_inode)->root = tree_root; 20480f7d52f4SChris Mason memset(&BTRFS_I(fs_info->btree_inode)->location, 0, 20490f7d52f4SChris Mason sizeof(struct btrfs_key)); 205076dda93cSYan, Zheng BTRFS_I(fs_info->btree_inode)->dummy_inode = 1; 205122b0ebdaSChris Mason insert_inode_hash(fs_info->btree_inode); 205239279cc3SChris Mason 2053e02119d5SChris Mason spin_lock_init(&fs_info->block_group_cache_lock); 20546bef4d31SEric Paris fs_info->block_group_cache_tree = RB_ROOT; 2055925baeddSChris Mason 205611833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[0], 2057f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 205811833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[1], 2059f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 206011833d66SYan Zheng fs_info->pinned_extents = &fs_info->freed_extents[0]; 2061e6dcd2dcSChris Mason fs_info->do_barriers = 1; 2062f9295749SChris Mason 2063d98237b3SChris Mason 20645a3f23d5SChris Mason mutex_init(&fs_info->ordered_operations_mutex); 206530ae8467SChris Mason mutex_init(&fs_info->tree_log_mutex); 2066925baeddSChris Mason mutex_init(&fs_info->chunk_mutex); 2067925baeddSChris Mason mutex_init(&fs_info->transaction_kthread_mutex); 2068a74a4b97SChris Mason mutex_init(&fs_info->cleaner_mutex); 2069a74a4b97SChris Mason mutex_init(&fs_info->volume_mutex); 2070276e680dSYan Zheng init_rwsem(&fs_info->extent_commit_sem); 2071c71bf099SYan, Zheng init_rwsem(&fs_info->cleanup_work_sem); 207276dda93cSYan, Zheng init_rwsem(&fs_info->subvol_sem); 2073fa9c0d79SChris Mason 2074fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); 2075fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->data_alloc_cluster); 2076fa9c0d79SChris Mason 20777d9eb12cSChris Mason init_waitqueue_head(&fs_info->transaction_throttle); 20783768f368SChris Mason init_waitqueue_head(&fs_info->transaction_wait); 2079bb9c12c9SSage Weil init_waitqueue_head(&fs_info->transaction_blocked_wait); 20804854ddd0SChris Mason init_waitqueue_head(&fs_info->async_submit_wait); 20819a8dd150SChris Mason 20820b86a832SChris Mason __setup_root(4096, 4096, 4096, 4096, tree_root, 20832c90e5d6SChris Mason fs_info, BTRFS_ROOT_TREE_OBJECTID); 20847eccb903SChris Mason 2085a512bbf8SYan Zheng bh = btrfs_read_dev_super(fs_devices->latest_bdev); 208620b45077SDave Young if (!bh) { 208720b45077SDave Young err = -EINVAL; 208816cdcec7SMiao Xie goto fail_alloc; 208920b45077SDave Young } 209039279cc3SChris Mason 20916c41761fSDavid Sterba memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); 20926c41761fSDavid Sterba memcpy(fs_info->super_for_commit, fs_info->super_copy, 20936c41761fSDavid Sterba sizeof(*fs_info->super_for_commit)); 2094a061fc8dSChris Mason brelse(bh); 20955f39d397SChris Mason 20966c41761fSDavid Sterba memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); 20970b86a832SChris Mason 20986c41761fSDavid Sterba disk_super = fs_info->super_copy; 20990f7d52f4SChris Mason if (!btrfs_super_root(disk_super)) 210016cdcec7SMiao Xie goto fail_alloc; 21010f7d52f4SChris Mason 2102acce952bSliubo /* check FS state, whether FS is broken. */ 2103acce952bSliubo fs_info->fs_state |= btrfs_super_flags(disk_super); 2104acce952bSliubo 2105acce952bSliubo btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); 2106acce952bSliubo 210775e7cb7fSLiu Bo /* 2108af31f5e5SChris Mason * run through our array of backup supers and setup 2109af31f5e5SChris Mason * our ring pointer to the oldest one 2110af31f5e5SChris Mason */ 2111af31f5e5SChris Mason generation = btrfs_super_generation(disk_super); 2112af31f5e5SChris Mason find_oldest_super_backup(fs_info, generation); 2113af31f5e5SChris Mason 2114af31f5e5SChris Mason /* 211575e7cb7fSLiu Bo * In the long term, we'll store the compression type in the super 211675e7cb7fSLiu Bo * block, and it'll be used for per file compression control. 211775e7cb7fSLiu Bo */ 211875e7cb7fSLiu Bo fs_info->compress_type = BTRFS_COMPRESS_ZLIB; 211975e7cb7fSLiu Bo 21202b82032cSYan Zheng ret = btrfs_parse_options(tree_root, options); 21212b82032cSYan Zheng if (ret) { 21222b82032cSYan Zheng err = ret; 212316cdcec7SMiao Xie goto fail_alloc; 21242b82032cSYan Zheng } 2125dfe25020SChris Mason 2126f2b636e8SJosef Bacik features = btrfs_super_incompat_flags(disk_super) & 2127f2b636e8SJosef Bacik ~BTRFS_FEATURE_INCOMPAT_SUPP; 2128f2b636e8SJosef Bacik if (features) { 2129f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount because of " 2130f2b636e8SJosef Bacik "unsupported optional features (%Lx).\n", 213121380931SJoel Becker (unsigned long long)features); 2132f2b636e8SJosef Bacik err = -EINVAL; 213316cdcec7SMiao Xie goto fail_alloc; 2134f2b636e8SJosef Bacik } 2135f2b636e8SJosef Bacik 21365d4f98a2SYan Zheng features = btrfs_super_incompat_flags(disk_super); 21375d4f98a2SYan Zheng features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; 2138a6fa6faeSLi Zefan if (tree_root->fs_info->compress_type & BTRFS_COMPRESS_LZO) 2139a6fa6faeSLi Zefan features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; 21405d4f98a2SYan Zheng btrfs_set_super_incompat_flags(disk_super, features); 21415d4f98a2SYan Zheng 2142f2b636e8SJosef Bacik features = btrfs_super_compat_ro_flags(disk_super) & 2143f2b636e8SJosef Bacik ~BTRFS_FEATURE_COMPAT_RO_SUPP; 2144f2b636e8SJosef Bacik if (!(sb->s_flags & MS_RDONLY) && features) { 2145f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount RDWR because of " 2146f2b636e8SJosef Bacik "unsupported option features (%Lx).\n", 214721380931SJoel Becker (unsigned long long)features); 2148f2b636e8SJosef Bacik err = -EINVAL; 214916cdcec7SMiao Xie goto fail_alloc; 2150f2b636e8SJosef Bacik } 215161d92c32SChris Mason 215261d92c32SChris Mason btrfs_init_workers(&fs_info->generic_worker, 215361d92c32SChris Mason "genwork", 1, NULL); 215461d92c32SChris Mason 21555443be45SChris Mason btrfs_init_workers(&fs_info->workers, "worker", 215661d92c32SChris Mason fs_info->thread_pool_size, 215761d92c32SChris Mason &fs_info->generic_worker); 2158c8b97818SChris Mason 2159771ed689SChris Mason btrfs_init_workers(&fs_info->delalloc_workers, "delalloc", 216061d92c32SChris Mason fs_info->thread_pool_size, 216161d92c32SChris Mason &fs_info->generic_worker); 2162771ed689SChris Mason 21635443be45SChris Mason btrfs_init_workers(&fs_info->submit_workers, "submit", 2164b720d209SChris Mason min_t(u64, fs_devices->num_devices, 216561d92c32SChris Mason fs_info->thread_pool_size), 216661d92c32SChris Mason &fs_info->generic_worker); 216761b49440SChris Mason 2168bab39bf9SJosef Bacik btrfs_init_workers(&fs_info->caching_workers, "cache", 2169bab39bf9SJosef Bacik 2, &fs_info->generic_worker); 2170bab39bf9SJosef Bacik 217161b49440SChris Mason /* a higher idle thresh on the submit workers makes it much more 217261b49440SChris Mason * likely that bios will be send down in a sane order to the 217361b49440SChris Mason * devices 217461b49440SChris Mason */ 217561b49440SChris Mason fs_info->submit_workers.idle_thresh = 64; 217653863232SChris Mason 2177771ed689SChris Mason fs_info->workers.idle_thresh = 16; 21784a69a410SChris Mason fs_info->workers.ordered = 1; 217961b49440SChris Mason 2180771ed689SChris Mason fs_info->delalloc_workers.idle_thresh = 2; 2181771ed689SChris Mason fs_info->delalloc_workers.ordered = 1; 2182771ed689SChris Mason 218361d92c32SChris Mason btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1, 218461d92c32SChris Mason &fs_info->generic_worker); 21855443be45SChris Mason btrfs_init_workers(&fs_info->endio_workers, "endio", 218661d92c32SChris Mason fs_info->thread_pool_size, 218761d92c32SChris Mason &fs_info->generic_worker); 2188d20f7043SChris Mason btrfs_init_workers(&fs_info->endio_meta_workers, "endio-meta", 218961d92c32SChris Mason fs_info->thread_pool_size, 219061d92c32SChris Mason &fs_info->generic_worker); 2191cad321adSChris Mason btrfs_init_workers(&fs_info->endio_meta_write_workers, 219261d92c32SChris Mason "endio-meta-write", fs_info->thread_pool_size, 219361d92c32SChris Mason &fs_info->generic_worker); 21945443be45SChris Mason btrfs_init_workers(&fs_info->endio_write_workers, "endio-write", 219561d92c32SChris Mason fs_info->thread_pool_size, 219661d92c32SChris Mason &fs_info->generic_worker); 21970cb59c99SJosef Bacik btrfs_init_workers(&fs_info->endio_freespace_worker, "freespace-write", 21980cb59c99SJosef Bacik 1, &fs_info->generic_worker); 219916cdcec7SMiao Xie btrfs_init_workers(&fs_info->delayed_workers, "delayed-meta", 220016cdcec7SMiao Xie fs_info->thread_pool_size, 220116cdcec7SMiao Xie &fs_info->generic_worker); 220290519d66SArne Jansen btrfs_init_workers(&fs_info->readahead_workers, "readahead", 220390519d66SArne Jansen fs_info->thread_pool_size, 220490519d66SArne Jansen &fs_info->generic_worker); 220561b49440SChris Mason 220661b49440SChris Mason /* 220761b49440SChris Mason * endios are largely parallel and should have a very 220861b49440SChris Mason * low idle thresh 220961b49440SChris Mason */ 221061b49440SChris Mason fs_info->endio_workers.idle_thresh = 4; 2211b51912c9SChris Mason fs_info->endio_meta_workers.idle_thresh = 4; 2212b51912c9SChris Mason 22139042846bSChris Mason fs_info->endio_write_workers.idle_thresh = 2; 22149042846bSChris Mason fs_info->endio_meta_write_workers.idle_thresh = 2; 221590519d66SArne Jansen fs_info->readahead_workers.idle_thresh = 2; 22169042846bSChris Mason 22170dc3b84aSJosef Bacik /* 22180dc3b84aSJosef Bacik * btrfs_start_workers can really only fail because of ENOMEM so just 22190dc3b84aSJosef Bacik * return -ENOMEM if any of these fail. 22200dc3b84aSJosef Bacik */ 22210dc3b84aSJosef Bacik ret = btrfs_start_workers(&fs_info->workers); 22220dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->generic_worker); 22230dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->submit_workers); 22240dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delalloc_workers); 22250dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->fixup_workers); 22260dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_workers); 22270dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_workers); 22280dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_write_workers); 22290dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_write_workers); 22300dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_freespace_worker); 22310dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delayed_workers); 22320dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->caching_workers); 22330dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->readahead_workers); 22340dc3b84aSJosef Bacik if (ret) { 22350dc3b84aSJosef Bacik ret = -ENOMEM; 22360dc3b84aSJosef Bacik goto fail_sb_buffer; 22370dc3b84aSJosef Bacik } 22384543df7eSChris Mason 22394575c9ccSChris Mason fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); 2240c8b97818SChris Mason fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, 2241c8b97818SChris Mason 4 * 1024 * 1024 / PAGE_CACHE_SIZE); 22424575c9ccSChris Mason 2243db94535dSChris Mason nodesize = btrfs_super_nodesize(disk_super); 2244db94535dSChris Mason leafsize = btrfs_super_leafsize(disk_super); 2245db94535dSChris Mason sectorsize = btrfs_super_sectorsize(disk_super); 224687ee04ebSChris Mason stripesize = btrfs_super_stripesize(disk_super); 2247db94535dSChris Mason tree_root->nodesize = nodesize; 2248db94535dSChris Mason tree_root->leafsize = leafsize; 2249db94535dSChris Mason tree_root->sectorsize = sectorsize; 225087ee04ebSChris Mason tree_root->stripesize = stripesize; 2251a061fc8dSChris Mason 2252a061fc8dSChris Mason sb->s_blocksize = sectorsize; 2253a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(sectorsize); 2254db94535dSChris Mason 225539279cc3SChris Mason if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC, 225639279cc3SChris Mason sizeof(disk_super->magic))) { 2257d397712bSChris Mason printk(KERN_INFO "btrfs: valid FS not found on %s\n", sb->s_id); 225839279cc3SChris Mason goto fail_sb_buffer; 225939279cc3SChris Mason } 226019c00ddcSChris Mason 2261941b2ddfSKeith Mannthey if (sectorsize < PAGE_SIZE) { 2262941b2ddfSKeith Mannthey printk(KERN_WARNING "btrfs: Incompatible sector size " 2263941b2ddfSKeith Mannthey "found on %s\n", sb->s_id); 2264941b2ddfSKeith Mannthey goto fail_sb_buffer; 2265941b2ddfSKeith Mannthey } 2266941b2ddfSKeith Mannthey 2267925baeddSChris Mason mutex_lock(&fs_info->chunk_mutex); 2268e4404d6eSYan Zheng ret = btrfs_read_sys_array(tree_root); 2269925baeddSChris Mason mutex_unlock(&fs_info->chunk_mutex); 227084eed90fSChris Mason if (ret) { 2271d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read the system " 2272d397712bSChris Mason "array on %s\n", sb->s_id); 22735d4f98a2SYan Zheng goto fail_sb_buffer; 227484eed90fSChris Mason } 22750b86a832SChris Mason 22760b86a832SChris Mason blocksize = btrfs_level_size(tree_root, 22770b86a832SChris Mason btrfs_super_chunk_root_level(disk_super)); 227884234f3aSYan Zheng generation = btrfs_super_chunk_root_generation(disk_super); 22790b86a832SChris Mason 22800b86a832SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 22810b86a832SChris Mason chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); 22820b86a832SChris Mason 22830b86a832SChris Mason chunk_root->node = read_tree_block(chunk_root, 22840b86a832SChris Mason btrfs_super_chunk_root(disk_super), 228584234f3aSYan Zheng blocksize, generation); 22860b86a832SChris Mason BUG_ON(!chunk_root->node); 228783121942SDavid Woodhouse if (!test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { 228883121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n", 228983121942SDavid Woodhouse sb->s_id); 2290af31f5e5SChris Mason goto fail_tree_roots; 229183121942SDavid Woodhouse } 22925d4f98a2SYan Zheng btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); 22935d4f98a2SYan Zheng chunk_root->commit_root = btrfs_root_node(chunk_root); 22940b86a832SChris Mason 2295e17cade2SChris Mason read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, 2296e17cade2SChris Mason (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node), 2297e17cade2SChris Mason BTRFS_UUID_SIZE); 2298e17cade2SChris Mason 22990b86a832SChris Mason ret = btrfs_read_chunk_tree(chunk_root); 23002b82032cSYan Zheng if (ret) { 2301d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read chunk tree on %s\n", 2302d397712bSChris Mason sb->s_id); 2303af31f5e5SChris Mason goto fail_tree_roots; 23042b82032cSYan Zheng } 23050b86a832SChris Mason 2306dfe25020SChris Mason btrfs_close_extra_devices(fs_devices); 2307dfe25020SChris Mason 2308a6b0d5c8SChris Mason if (!fs_devices->latest_bdev) { 2309a6b0d5c8SChris Mason printk(KERN_CRIT "btrfs: failed to read devices on %s\n", 2310a6b0d5c8SChris Mason sb->s_id); 2311a6b0d5c8SChris Mason goto fail_tree_roots; 2312a6b0d5c8SChris Mason } 2313a6b0d5c8SChris Mason 2314af31f5e5SChris Mason retry_root_backup: 2315db94535dSChris Mason blocksize = btrfs_level_size(tree_root, 2316db94535dSChris Mason btrfs_super_root_level(disk_super)); 231784234f3aSYan Zheng generation = btrfs_super_generation(disk_super); 23180b86a832SChris Mason 2319e20d96d6SChris Mason tree_root->node = read_tree_block(tree_root, 2320db94535dSChris Mason btrfs_super_root(disk_super), 232184234f3aSYan Zheng blocksize, generation); 2322af31f5e5SChris Mason if (!tree_root->node || 2323af31f5e5SChris Mason !test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) { 232483121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read tree root on %s\n", 232583121942SDavid Woodhouse sb->s_id); 2326af31f5e5SChris Mason 2327af31f5e5SChris Mason goto recovery_tree_root; 232883121942SDavid Woodhouse } 2329af31f5e5SChris Mason 23305d4f98a2SYan Zheng btrfs_set_root_node(&tree_root->root_item, tree_root->node); 23315d4f98a2SYan Zheng tree_root->commit_root = btrfs_root_node(tree_root); 2332db94535dSChris Mason 2333db94535dSChris Mason ret = find_and_setup_root(tree_root, fs_info, 2334e20d96d6SChris Mason BTRFS_EXTENT_TREE_OBJECTID, extent_root); 23350b86a832SChris Mason if (ret) 2336af31f5e5SChris Mason goto recovery_tree_root; 23370b86a832SChris Mason extent_root->track_dirty = 1; 23380b86a832SChris Mason 23390b86a832SChris Mason ret = find_and_setup_root(tree_root, fs_info, 23400b86a832SChris Mason BTRFS_DEV_TREE_OBJECTID, dev_root); 23410b86a832SChris Mason if (ret) 2342af31f5e5SChris Mason goto recovery_tree_root; 23435d4f98a2SYan Zheng dev_root->track_dirty = 1; 23443768f368SChris Mason 2345d20f7043SChris Mason ret = find_and_setup_root(tree_root, fs_info, 2346d20f7043SChris Mason BTRFS_CSUM_TREE_OBJECTID, csum_root); 2347d20f7043SChris Mason if (ret) 2348af31f5e5SChris Mason goto recovery_tree_root; 2349d20f7043SChris Mason 2350d20f7043SChris Mason csum_root->track_dirty = 1; 2351d20f7043SChris Mason 23528929ecfaSYan, Zheng fs_info->generation = generation; 23538929ecfaSYan, Zheng fs_info->last_trans_committed = generation; 23548929ecfaSYan, Zheng 2355c59021f8Sliubo ret = btrfs_init_space_info(fs_info); 2356c59021f8Sliubo if (ret) { 2357c59021f8Sliubo printk(KERN_ERR "Failed to initial space info: %d\n", ret); 2358c59021f8Sliubo goto fail_block_groups; 2359c59021f8Sliubo } 2360c59021f8Sliubo 23611b1d1f66SJosef Bacik ret = btrfs_read_block_groups(extent_root); 23621b1d1f66SJosef Bacik if (ret) { 23631b1d1f66SJosef Bacik printk(KERN_ERR "Failed to read block groups: %d\n", ret); 23641b1d1f66SJosef Bacik goto fail_block_groups; 23651b1d1f66SJosef Bacik } 23669078a3e1SChris Mason 2367a74a4b97SChris Mason fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 2368a74a4b97SChris Mason "btrfs-cleaner"); 236957506d50SQinghuang Feng if (IS_ERR(fs_info->cleaner_kthread)) 23701b1d1f66SJosef Bacik goto fail_block_groups; 2371a74a4b97SChris Mason 2372a74a4b97SChris Mason fs_info->transaction_kthread = kthread_run(transaction_kthread, 2373a74a4b97SChris Mason tree_root, 2374a74a4b97SChris Mason "btrfs-transaction"); 237557506d50SQinghuang Feng if (IS_ERR(fs_info->transaction_kthread)) 23763f157a2fSChris Mason goto fail_cleaner; 2377a74a4b97SChris Mason 2378c289811cSChris Mason if (!btrfs_test_opt(tree_root, SSD) && 2379c289811cSChris Mason !btrfs_test_opt(tree_root, NOSSD) && 2380c289811cSChris Mason !fs_info->fs_devices->rotating) { 2381c289811cSChris Mason printk(KERN_INFO "Btrfs detected SSD devices, enabling SSD " 2382c289811cSChris Mason "mode\n"); 2383c289811cSChris Mason btrfs_set_opt(fs_info->mount_opt, SSD); 2384c289811cSChris Mason } 2385c289811cSChris Mason 238621adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 238721adbd5cSStefan Behrens if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { 238821adbd5cSStefan Behrens ret = btrfsic_mount(tree_root, fs_devices, 238921adbd5cSStefan Behrens btrfs_test_opt(tree_root, 239021adbd5cSStefan Behrens CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? 239121adbd5cSStefan Behrens 1 : 0, 239221adbd5cSStefan Behrens fs_info->check_integrity_print_mask); 239321adbd5cSStefan Behrens if (ret) 239421adbd5cSStefan Behrens printk(KERN_WARNING "btrfs: failed to initialize" 239521adbd5cSStefan Behrens " integrity check module %s\n", sb->s_id); 239621adbd5cSStefan Behrens } 239721adbd5cSStefan Behrens #endif 239821adbd5cSStefan Behrens 2399acce952bSliubo /* do not make disk changes in broken FS */ 2400acce952bSliubo if (btrfs_super_log_root(disk_super) != 0 && 2401acce952bSliubo !(fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR)) { 2402e02119d5SChris Mason u64 bytenr = btrfs_super_log_root(disk_super); 2403d18a2c44SChris Mason 24047c2ca468SChris Mason if (fs_devices->rw_devices == 0) { 2405d397712bSChris Mason printk(KERN_WARNING "Btrfs log replay required " 2406d397712bSChris Mason "on RO media\n"); 24077c2ca468SChris Mason err = -EIO; 24087c2ca468SChris Mason goto fail_trans_kthread; 24097c2ca468SChris Mason } 2410e02119d5SChris Mason blocksize = 2411e02119d5SChris Mason btrfs_level_size(tree_root, 2412e02119d5SChris Mason btrfs_super_log_root_level(disk_super)); 2413e02119d5SChris Mason 2414676e4c86SDan Carpenter log_tree_root = kzalloc(sizeof(struct btrfs_root), GFP_NOFS); 2415676e4c86SDan Carpenter if (!log_tree_root) { 2416676e4c86SDan Carpenter err = -ENOMEM; 2417676e4c86SDan Carpenter goto fail_trans_kthread; 2418676e4c86SDan Carpenter } 2419e02119d5SChris Mason 2420e02119d5SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 2421e02119d5SChris Mason log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); 2422e02119d5SChris Mason 2423e02119d5SChris Mason log_tree_root->node = read_tree_block(tree_root, bytenr, 242484234f3aSYan Zheng blocksize, 242584234f3aSYan Zheng generation + 1); 2426e02119d5SChris Mason ret = btrfs_recover_log_trees(log_tree_root); 2427e02119d5SChris Mason BUG_ON(ret); 2428e556ce2cSYan Zheng 2429e556ce2cSYan Zheng if (sb->s_flags & MS_RDONLY) { 2430e556ce2cSYan Zheng ret = btrfs_commit_super(tree_root); 2431e556ce2cSYan Zheng BUG_ON(ret); 2432e556ce2cSYan Zheng } 2433e02119d5SChris Mason } 24341a40e23bSZheng Yan 243576dda93cSYan, Zheng ret = btrfs_find_orphan_roots(tree_root); 243676dda93cSYan, Zheng BUG_ON(ret); 243776dda93cSYan, Zheng 24387c2ca468SChris Mason if (!(sb->s_flags & MS_RDONLY)) { 2439d68fc57bSYan, Zheng ret = btrfs_cleanup_fs_roots(fs_info); 2440d68fc57bSYan, Zheng BUG_ON(ret); 2441d68fc57bSYan, Zheng 24425d4f98a2SYan Zheng ret = btrfs_recover_relocation(tree_root); 2443d7ce5843SMiao Xie if (ret < 0) { 2444d7ce5843SMiao Xie printk(KERN_WARNING 2445d7ce5843SMiao Xie "btrfs: failed to recover relocation\n"); 2446d7ce5843SMiao Xie err = -EINVAL; 2447d7ce5843SMiao Xie goto fail_trans_kthread; 2448d7ce5843SMiao Xie } 24497c2ca468SChris Mason } 24501a40e23bSZheng Yan 24513de4586cSChris Mason location.objectid = BTRFS_FS_TREE_OBJECTID; 24523de4586cSChris Mason location.type = BTRFS_ROOT_ITEM_KEY; 24533de4586cSChris Mason location.offset = (u64)-1; 24543de4586cSChris Mason 24553de4586cSChris Mason fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); 24563de4586cSChris Mason if (!fs_info->fs_root) 24577c2ca468SChris Mason goto fail_trans_kthread; 24583140c9a3SDan Carpenter if (IS_ERR(fs_info->fs_root)) { 24593140c9a3SDan Carpenter err = PTR_ERR(fs_info->fs_root); 24603140c9a3SDan Carpenter goto fail_trans_kthread; 24613140c9a3SDan Carpenter } 2462c289811cSChris Mason 2463e3acc2a6SJosef Bacik if (!(sb->s_flags & MS_RDONLY)) { 2464e3acc2a6SJosef Bacik down_read(&fs_info->cleanup_work_sem); 246566b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(fs_info->fs_root); 246666b4ffd1SJosef Bacik if (!err) 246766b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(fs_info->tree_root); 2468e3acc2a6SJosef Bacik up_read(&fs_info->cleanup_work_sem); 246959641015SIlya Dryomov 247059641015SIlya Dryomov if (!err) 247159641015SIlya Dryomov err = btrfs_recover_balance(fs_info->tree_root); 247259641015SIlya Dryomov 247366b4ffd1SJosef Bacik if (err) { 247466b4ffd1SJosef Bacik close_ctree(tree_root); 247566b4ffd1SJosef Bacik return ERR_PTR(err); 247666b4ffd1SJosef Bacik } 2477e3acc2a6SJosef Bacik } 2478e3acc2a6SJosef Bacik 24790f7d52f4SChris Mason return tree_root; 248039279cc3SChris Mason 24817c2ca468SChris Mason fail_trans_kthread: 24827c2ca468SChris Mason kthread_stop(fs_info->transaction_kthread); 24833f157a2fSChris Mason fail_cleaner: 2484a74a4b97SChris Mason kthread_stop(fs_info->cleaner_kthread); 24857c2ca468SChris Mason 24867c2ca468SChris Mason /* 24877c2ca468SChris Mason * make sure we're done with the btree inode before we stop our 24887c2ca468SChris Mason * kthreads 24897c2ca468SChris Mason */ 24907c2ca468SChris Mason filemap_write_and_wait(fs_info->btree_inode->i_mapping); 24917c2ca468SChris Mason invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 24927c2ca468SChris Mason 24931b1d1f66SJosef Bacik fail_block_groups: 24941b1d1f66SJosef Bacik btrfs_free_block_groups(fs_info); 2495af31f5e5SChris Mason 2496af31f5e5SChris Mason fail_tree_roots: 2497af31f5e5SChris Mason free_root_pointers(fs_info, 1); 2498af31f5e5SChris Mason 249939279cc3SChris Mason fail_sb_buffer: 250061d92c32SChris Mason btrfs_stop_workers(&fs_info->generic_worker); 2501306c8b68SChris Mason btrfs_stop_workers(&fs_info->readahead_workers); 2502247e743cSChris Mason btrfs_stop_workers(&fs_info->fixup_workers); 2503771ed689SChris Mason btrfs_stop_workers(&fs_info->delalloc_workers); 25048b712842SChris Mason btrfs_stop_workers(&fs_info->workers); 25058b712842SChris Mason btrfs_stop_workers(&fs_info->endio_workers); 2506d20f7043SChris Mason btrfs_stop_workers(&fs_info->endio_meta_workers); 2507cad321adSChris Mason btrfs_stop_workers(&fs_info->endio_meta_write_workers); 2508e6dcd2dcSChris Mason btrfs_stop_workers(&fs_info->endio_write_workers); 25090cb59c99SJosef Bacik btrfs_stop_workers(&fs_info->endio_freespace_worker); 25101cc127b5SChris Mason btrfs_stop_workers(&fs_info->submit_workers); 251116cdcec7SMiao Xie btrfs_stop_workers(&fs_info->delayed_workers); 2512bab39bf9SJosef Bacik btrfs_stop_workers(&fs_info->caching_workers); 251316cdcec7SMiao Xie fail_alloc: 25144543df7eSChris Mason fail_iput: 2515586e46e2SIlya Dryomov btrfs_mapping_tree_free(&fs_info->mapping_tree); 2516586e46e2SIlya Dryomov 25177c2ca468SChris Mason invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 25184543df7eSChris Mason iput(fs_info->btree_inode); 2519ad081f14SJens Axboe fail_bdi: 25207e662854SQinghuang Feng bdi_destroy(&fs_info->bdi); 252176dda93cSYan, Zheng fail_srcu: 252276dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 25237e662854SQinghuang Feng fail: 2524586e46e2SIlya Dryomov btrfs_close_devices(fs_info->fs_devices); 25256c41761fSDavid Sterba free_fs_info(fs_info); 252639279cc3SChris Mason return ERR_PTR(err); 2527af31f5e5SChris Mason 2528af31f5e5SChris Mason recovery_tree_root: 2529af31f5e5SChris Mason if (!btrfs_test_opt(tree_root, RECOVERY)) 2530af31f5e5SChris Mason goto fail_tree_roots; 2531af31f5e5SChris Mason 2532af31f5e5SChris Mason free_root_pointers(fs_info, 0); 2533af31f5e5SChris Mason 2534af31f5e5SChris Mason /* don't use the log in recovery mode, it won't be valid */ 2535af31f5e5SChris Mason btrfs_set_super_log_root(disk_super, 0); 2536af31f5e5SChris Mason 2537af31f5e5SChris Mason /* we can't trust the free space cache either */ 2538af31f5e5SChris Mason btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); 2539af31f5e5SChris Mason 2540af31f5e5SChris Mason ret = next_root_backup(fs_info, fs_info->super_copy, 2541af31f5e5SChris Mason &num_backups_tried, &backup_index); 2542af31f5e5SChris Mason if (ret == -1) 2543af31f5e5SChris Mason goto fail_block_groups; 2544af31f5e5SChris Mason goto retry_root_backup; 2545eb60ceacSChris Mason } 2546eb60ceacSChris Mason 2547f2984462SChris Mason static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) 2548f2984462SChris Mason { 2549f2984462SChris Mason char b[BDEVNAME_SIZE]; 2550f2984462SChris Mason 2551f2984462SChris Mason if (uptodate) { 2552f2984462SChris Mason set_buffer_uptodate(bh); 2553f2984462SChris Mason } else { 25547a36ddecSDavid Sterba printk_ratelimited(KERN_WARNING "lost page write due to " 2555f2984462SChris Mason "I/O error on %s\n", 2556f2984462SChris Mason bdevname(bh->b_bdev, b)); 25571259ab75SChris Mason /* note, we dont' set_buffer_write_io_error because we have 25581259ab75SChris Mason * our own ways of dealing with the IO errors 25591259ab75SChris Mason */ 2560f2984462SChris Mason clear_buffer_uptodate(bh); 2561f2984462SChris Mason } 2562f2984462SChris Mason unlock_buffer(bh); 2563f2984462SChris Mason put_bh(bh); 2564f2984462SChris Mason } 2565f2984462SChris Mason 2566a512bbf8SYan Zheng struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) 2567a512bbf8SYan Zheng { 2568a512bbf8SYan Zheng struct buffer_head *bh; 2569a512bbf8SYan Zheng struct buffer_head *latest = NULL; 2570a512bbf8SYan Zheng struct btrfs_super_block *super; 2571a512bbf8SYan Zheng int i; 2572a512bbf8SYan Zheng u64 transid = 0; 2573a512bbf8SYan Zheng u64 bytenr; 2574a512bbf8SYan Zheng 2575a512bbf8SYan Zheng /* we would like to check all the supers, but that would make 2576a512bbf8SYan Zheng * a btrfs mount succeed after a mkfs from a different FS. 2577a512bbf8SYan Zheng * So, we need to add a special mount option to scan for 2578a512bbf8SYan Zheng * later supers, using BTRFS_SUPER_MIRROR_MAX instead 2579a512bbf8SYan Zheng */ 2580a512bbf8SYan Zheng for (i = 0; i < 1; i++) { 2581a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 2582a512bbf8SYan Zheng if (bytenr + 4096 >= i_size_read(bdev->bd_inode)) 2583a512bbf8SYan Zheng break; 2584a512bbf8SYan Zheng bh = __bread(bdev, bytenr / 4096, 4096); 2585a512bbf8SYan Zheng if (!bh) 2586a512bbf8SYan Zheng continue; 2587a512bbf8SYan Zheng 2588a512bbf8SYan Zheng super = (struct btrfs_super_block *)bh->b_data; 2589a512bbf8SYan Zheng if (btrfs_super_bytenr(super) != bytenr || 2590a512bbf8SYan Zheng strncmp((char *)(&super->magic), BTRFS_MAGIC, 2591a512bbf8SYan Zheng sizeof(super->magic))) { 2592a512bbf8SYan Zheng brelse(bh); 2593a512bbf8SYan Zheng continue; 2594a512bbf8SYan Zheng } 2595a512bbf8SYan Zheng 2596a512bbf8SYan Zheng if (!latest || btrfs_super_generation(super) > transid) { 2597a512bbf8SYan Zheng brelse(latest); 2598a512bbf8SYan Zheng latest = bh; 2599a512bbf8SYan Zheng transid = btrfs_super_generation(super); 2600a512bbf8SYan Zheng } else { 2601a512bbf8SYan Zheng brelse(bh); 2602a512bbf8SYan Zheng } 2603a512bbf8SYan Zheng } 2604a512bbf8SYan Zheng return latest; 2605a512bbf8SYan Zheng } 2606a512bbf8SYan Zheng 26074eedeb75SHisashi Hifumi /* 26084eedeb75SHisashi Hifumi * this should be called twice, once with wait == 0 and 26094eedeb75SHisashi Hifumi * once with wait == 1. When wait == 0 is done, all the buffer heads 26104eedeb75SHisashi Hifumi * we write are pinned. 26114eedeb75SHisashi Hifumi * 26124eedeb75SHisashi Hifumi * They are released when wait == 1 is done. 26134eedeb75SHisashi Hifumi * max_mirrors must be the same for both runs, and it indicates how 26144eedeb75SHisashi Hifumi * many supers on this one device should be written. 26154eedeb75SHisashi Hifumi * 26164eedeb75SHisashi Hifumi * max_mirrors == 0 means to write them all. 26174eedeb75SHisashi Hifumi */ 2618a512bbf8SYan Zheng static int write_dev_supers(struct btrfs_device *device, 2619a512bbf8SYan Zheng struct btrfs_super_block *sb, 2620a512bbf8SYan Zheng int do_barriers, int wait, int max_mirrors) 2621a512bbf8SYan Zheng { 2622a512bbf8SYan Zheng struct buffer_head *bh; 2623a512bbf8SYan Zheng int i; 2624a512bbf8SYan Zheng int ret; 2625a512bbf8SYan Zheng int errors = 0; 2626a512bbf8SYan Zheng u32 crc; 2627a512bbf8SYan Zheng u64 bytenr; 2628a512bbf8SYan Zheng 2629a512bbf8SYan Zheng if (max_mirrors == 0) 2630a512bbf8SYan Zheng max_mirrors = BTRFS_SUPER_MIRROR_MAX; 2631a512bbf8SYan Zheng 2632a512bbf8SYan Zheng for (i = 0; i < max_mirrors; i++) { 2633a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 2634a512bbf8SYan Zheng if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes) 2635a512bbf8SYan Zheng break; 2636a512bbf8SYan Zheng 2637a512bbf8SYan Zheng if (wait) { 2638a512bbf8SYan Zheng bh = __find_get_block(device->bdev, bytenr / 4096, 2639a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 2640a512bbf8SYan Zheng BUG_ON(!bh); 2641a512bbf8SYan Zheng wait_on_buffer(bh); 26424eedeb75SHisashi Hifumi if (!buffer_uptodate(bh)) 26434eedeb75SHisashi Hifumi errors++; 26444eedeb75SHisashi Hifumi 26454eedeb75SHisashi Hifumi /* drop our reference */ 26464eedeb75SHisashi Hifumi brelse(bh); 26474eedeb75SHisashi Hifumi 26484eedeb75SHisashi Hifumi /* drop the reference from the wait == 0 run */ 2649a512bbf8SYan Zheng brelse(bh); 2650a512bbf8SYan Zheng continue; 2651a512bbf8SYan Zheng } else { 2652a512bbf8SYan Zheng btrfs_set_super_bytenr(sb, bytenr); 2653a512bbf8SYan Zheng 2654a512bbf8SYan Zheng crc = ~(u32)0; 2655a512bbf8SYan Zheng crc = btrfs_csum_data(NULL, (char *)sb + 2656a512bbf8SYan Zheng BTRFS_CSUM_SIZE, crc, 2657a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE - 2658a512bbf8SYan Zheng BTRFS_CSUM_SIZE); 2659a512bbf8SYan Zheng btrfs_csum_final(crc, sb->csum); 2660a512bbf8SYan Zheng 26614eedeb75SHisashi Hifumi /* 26624eedeb75SHisashi Hifumi * one reference for us, and we leave it for the 26634eedeb75SHisashi Hifumi * caller 26644eedeb75SHisashi Hifumi */ 2665a512bbf8SYan Zheng bh = __getblk(device->bdev, bytenr / 4096, 2666a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 2667a512bbf8SYan Zheng memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); 2668a512bbf8SYan Zheng 26694eedeb75SHisashi Hifumi /* one reference for submit_bh */ 2670a512bbf8SYan Zheng get_bh(bh); 26714eedeb75SHisashi Hifumi 26724eedeb75SHisashi Hifumi set_buffer_uptodate(bh); 2673a512bbf8SYan Zheng lock_buffer(bh); 2674a512bbf8SYan Zheng bh->b_end_io = btrfs_end_buffer_write_sync; 2675a512bbf8SYan Zheng } 2676a512bbf8SYan Zheng 2677387125fcSChris Mason /* 2678387125fcSChris Mason * we fua the first super. The others we allow 2679387125fcSChris Mason * to go down lazy. 2680387125fcSChris Mason */ 268121adbd5cSStefan Behrens ret = btrfsic_submit_bh(WRITE_FUA, bh); 26824eedeb75SHisashi Hifumi if (ret) 2683a512bbf8SYan Zheng errors++; 2684a512bbf8SYan Zheng } 2685a512bbf8SYan Zheng return errors < i ? 0 : -1; 2686a512bbf8SYan Zheng } 2687a512bbf8SYan Zheng 2688387125fcSChris Mason /* 2689387125fcSChris Mason * endio for the write_dev_flush, this will wake anyone waiting 2690387125fcSChris Mason * for the barrier when it is done 2691387125fcSChris Mason */ 2692387125fcSChris Mason static void btrfs_end_empty_barrier(struct bio *bio, int err) 2693387125fcSChris Mason { 2694387125fcSChris Mason if (err) { 2695387125fcSChris Mason if (err == -EOPNOTSUPP) 2696387125fcSChris Mason set_bit(BIO_EOPNOTSUPP, &bio->bi_flags); 2697387125fcSChris Mason clear_bit(BIO_UPTODATE, &bio->bi_flags); 2698387125fcSChris Mason } 2699387125fcSChris Mason if (bio->bi_private) 2700387125fcSChris Mason complete(bio->bi_private); 2701387125fcSChris Mason bio_put(bio); 2702387125fcSChris Mason } 2703387125fcSChris Mason 2704387125fcSChris Mason /* 2705387125fcSChris Mason * trigger flushes for one the devices. If you pass wait == 0, the flushes are 2706387125fcSChris Mason * sent down. With wait == 1, it waits for the previous flush. 2707387125fcSChris Mason * 2708387125fcSChris Mason * any device where the flush fails with eopnotsupp are flagged as not-barrier 2709387125fcSChris Mason * capable 2710387125fcSChris Mason */ 2711387125fcSChris Mason static int write_dev_flush(struct btrfs_device *device, int wait) 2712387125fcSChris Mason { 2713387125fcSChris Mason struct bio *bio; 2714387125fcSChris Mason int ret = 0; 2715387125fcSChris Mason 2716387125fcSChris Mason if (device->nobarriers) 2717387125fcSChris Mason return 0; 2718387125fcSChris Mason 2719387125fcSChris Mason if (wait) { 2720387125fcSChris Mason bio = device->flush_bio; 2721387125fcSChris Mason if (!bio) 2722387125fcSChris Mason return 0; 2723387125fcSChris Mason 2724387125fcSChris Mason wait_for_completion(&device->flush_wait); 2725387125fcSChris Mason 2726387125fcSChris Mason if (bio_flagged(bio, BIO_EOPNOTSUPP)) { 2727387125fcSChris Mason printk("btrfs: disabling barriers on dev %s\n", 2728387125fcSChris Mason device->name); 2729387125fcSChris Mason device->nobarriers = 1; 2730387125fcSChris Mason } 2731387125fcSChris Mason if (!bio_flagged(bio, BIO_UPTODATE)) { 2732387125fcSChris Mason ret = -EIO; 2733387125fcSChris Mason } 2734387125fcSChris Mason 2735387125fcSChris Mason /* drop the reference from the wait == 0 run */ 2736387125fcSChris Mason bio_put(bio); 2737387125fcSChris Mason device->flush_bio = NULL; 2738387125fcSChris Mason 2739387125fcSChris Mason return ret; 2740387125fcSChris Mason } 2741387125fcSChris Mason 2742387125fcSChris Mason /* 2743387125fcSChris Mason * one reference for us, and we leave it for the 2744387125fcSChris Mason * caller 2745387125fcSChris Mason */ 2746387125fcSChris Mason device->flush_bio = NULL;; 2747387125fcSChris Mason bio = bio_alloc(GFP_NOFS, 0); 2748387125fcSChris Mason if (!bio) 2749387125fcSChris Mason return -ENOMEM; 2750387125fcSChris Mason 2751387125fcSChris Mason bio->bi_end_io = btrfs_end_empty_barrier; 2752387125fcSChris Mason bio->bi_bdev = device->bdev; 2753387125fcSChris Mason init_completion(&device->flush_wait); 2754387125fcSChris Mason bio->bi_private = &device->flush_wait; 2755387125fcSChris Mason device->flush_bio = bio; 2756387125fcSChris Mason 2757387125fcSChris Mason bio_get(bio); 275821adbd5cSStefan Behrens btrfsic_submit_bio(WRITE_FLUSH, bio); 2759387125fcSChris Mason 2760387125fcSChris Mason return 0; 2761387125fcSChris Mason } 2762387125fcSChris Mason 2763387125fcSChris Mason /* 2764387125fcSChris Mason * send an empty flush down to each device in parallel, 2765387125fcSChris Mason * then wait for them 2766387125fcSChris Mason */ 2767387125fcSChris Mason static int barrier_all_devices(struct btrfs_fs_info *info) 2768387125fcSChris Mason { 2769387125fcSChris Mason struct list_head *head; 2770387125fcSChris Mason struct btrfs_device *dev; 2771387125fcSChris Mason int errors = 0; 2772387125fcSChris Mason int ret; 2773387125fcSChris Mason 2774387125fcSChris Mason /* send down all the barriers */ 2775387125fcSChris Mason head = &info->fs_devices->devices; 2776387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 2777387125fcSChris Mason if (!dev->bdev) { 2778387125fcSChris Mason errors++; 2779387125fcSChris Mason continue; 2780387125fcSChris Mason } 2781387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 2782387125fcSChris Mason continue; 2783387125fcSChris Mason 2784387125fcSChris Mason ret = write_dev_flush(dev, 0); 2785387125fcSChris Mason if (ret) 2786387125fcSChris Mason errors++; 2787387125fcSChris Mason } 2788387125fcSChris Mason 2789387125fcSChris Mason /* wait for all the barriers */ 2790387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 2791387125fcSChris Mason if (!dev->bdev) { 2792387125fcSChris Mason errors++; 2793387125fcSChris Mason continue; 2794387125fcSChris Mason } 2795387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 2796387125fcSChris Mason continue; 2797387125fcSChris Mason 2798387125fcSChris Mason ret = write_dev_flush(dev, 1); 2799387125fcSChris Mason if (ret) 2800387125fcSChris Mason errors++; 2801387125fcSChris Mason } 2802387125fcSChris Mason if (errors) 2803387125fcSChris Mason return -EIO; 2804387125fcSChris Mason return 0; 2805387125fcSChris Mason } 2806387125fcSChris Mason 2807a512bbf8SYan Zheng int write_all_supers(struct btrfs_root *root, int max_mirrors) 2808f2984462SChris Mason { 2809e5e9a520SChris Mason struct list_head *head; 2810f2984462SChris Mason struct btrfs_device *dev; 2811a061fc8dSChris Mason struct btrfs_super_block *sb; 2812f2984462SChris Mason struct btrfs_dev_item *dev_item; 2813f2984462SChris Mason int ret; 2814f2984462SChris Mason int do_barriers; 2815a236aed1SChris Mason int max_errors; 2816a236aed1SChris Mason int total_errors = 0; 2817a061fc8dSChris Mason u64 flags; 2818f2984462SChris Mason 28196c41761fSDavid Sterba max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; 2820f2984462SChris Mason do_barriers = !btrfs_test_opt(root, NOBARRIER); 2821af31f5e5SChris Mason backup_super_roots(root->fs_info); 2822f2984462SChris Mason 28236c41761fSDavid Sterba sb = root->fs_info->super_for_commit; 2824a061fc8dSChris Mason dev_item = &sb->dev_item; 2825e5e9a520SChris Mason 2826174ba509SChris Mason mutex_lock(&root->fs_info->fs_devices->device_list_mutex); 2827e5e9a520SChris Mason head = &root->fs_info->fs_devices->devices; 2828387125fcSChris Mason 2829387125fcSChris Mason if (do_barriers) 2830387125fcSChris Mason barrier_all_devices(root->fs_info); 2831387125fcSChris Mason 28321f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 2833dfe25020SChris Mason if (!dev->bdev) { 2834dfe25020SChris Mason total_errors++; 2835dfe25020SChris Mason continue; 2836dfe25020SChris Mason } 28372b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 2838dfe25020SChris Mason continue; 2839dfe25020SChris Mason 28402b82032cSYan Zheng btrfs_set_stack_device_generation(dev_item, 0); 2841a061fc8dSChris Mason btrfs_set_stack_device_type(dev_item, dev->type); 2842a061fc8dSChris Mason btrfs_set_stack_device_id(dev_item, dev->devid); 2843a061fc8dSChris Mason btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes); 2844a061fc8dSChris Mason btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used); 2845a061fc8dSChris Mason btrfs_set_stack_device_io_align(dev_item, dev->io_align); 2846a061fc8dSChris Mason btrfs_set_stack_device_io_width(dev_item, dev->io_width); 2847a061fc8dSChris Mason btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); 2848a061fc8dSChris Mason memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); 28492b82032cSYan Zheng memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); 2850a512bbf8SYan Zheng 2851a061fc8dSChris Mason flags = btrfs_super_flags(sb); 2852a061fc8dSChris Mason btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); 2853f2984462SChris Mason 2854a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); 2855a236aed1SChris Mason if (ret) 2856a236aed1SChris Mason total_errors++; 2857f2984462SChris Mason } 2858a236aed1SChris Mason if (total_errors > max_errors) { 2859d397712bSChris Mason printk(KERN_ERR "btrfs: %d errors while writing supers\n", 2860d397712bSChris Mason total_errors); 2861a236aed1SChris Mason BUG(); 2862a236aed1SChris Mason } 2863f2984462SChris Mason 2864a512bbf8SYan Zheng total_errors = 0; 28651f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 2866dfe25020SChris Mason if (!dev->bdev) 2867dfe25020SChris Mason continue; 28682b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 2869dfe25020SChris Mason continue; 2870dfe25020SChris Mason 2871a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); 2872a512bbf8SYan Zheng if (ret) 28731259ab75SChris Mason total_errors++; 2874f2984462SChris Mason } 2875174ba509SChris Mason mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 2876a236aed1SChris Mason if (total_errors > max_errors) { 2877d397712bSChris Mason printk(KERN_ERR "btrfs: %d errors while writing supers\n", 2878d397712bSChris Mason total_errors); 2879a236aed1SChris Mason BUG(); 2880a236aed1SChris Mason } 2881f2984462SChris Mason return 0; 2882f2984462SChris Mason } 2883f2984462SChris Mason 2884a512bbf8SYan Zheng int write_ctree_super(struct btrfs_trans_handle *trans, 2885a512bbf8SYan Zheng struct btrfs_root *root, int max_mirrors) 2886cfaa7295SChris Mason { 2887e66f709bSChris Mason int ret; 28882c90e5d6SChris Mason 2889a512bbf8SYan Zheng ret = write_all_supers(root, max_mirrors); 28905f39d397SChris Mason return ret; 2891cfaa7295SChris Mason } 2892cfaa7295SChris Mason 28935eda7b5eSChris Mason int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) 28942619ba1fSChris Mason { 28954df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 28962619ba1fSChris Mason radix_tree_delete(&fs_info->fs_roots_radix, 28972619ba1fSChris Mason (unsigned long)root->root_key.objectid); 28984df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 289976dda93cSYan, Zheng 290076dda93cSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) 290176dda93cSYan, Zheng synchronize_srcu(&fs_info->subvol_srcu); 290276dda93cSYan, Zheng 2903581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_pinned); 2904581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_ctl); 29054df27c4dSYan, Zheng free_fs_root(root); 29064df27c4dSYan, Zheng return 0; 29074df27c4dSYan, Zheng } 29084df27c4dSYan, Zheng 29094df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root) 29104df27c4dSYan, Zheng { 291182d5902dSLi Zefan iput(root->cache_inode); 29124df27c4dSYan, Zheng WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); 29130ee5dc67SAl Viro if (root->anon_dev) 29140ee5dc67SAl Viro free_anon_bdev(root->anon_dev); 29155f39d397SChris Mason free_extent_buffer(root->node); 29165f39d397SChris Mason free_extent_buffer(root->commit_root); 2917581bb050SLi Zefan kfree(root->free_ino_ctl); 2918581bb050SLi Zefan kfree(root->free_ino_pinned); 291958176a96SJosef Bacik kfree(root->name); 29202619ba1fSChris Mason kfree(root); 29212619ba1fSChris Mason } 29222619ba1fSChris Mason 292335b7e476SChris Mason static int del_fs_roots(struct btrfs_fs_info *fs_info) 29240f7d52f4SChris Mason { 29250f7d52f4SChris Mason int ret; 29260f7d52f4SChris Mason struct btrfs_root *gang[8]; 29270f7d52f4SChris Mason int i; 29280f7d52f4SChris Mason 292976dda93cSYan, Zheng while (!list_empty(&fs_info->dead_roots)) { 293076dda93cSYan, Zheng gang[0] = list_entry(fs_info->dead_roots.next, 293176dda93cSYan, Zheng struct btrfs_root, root_list); 293276dda93cSYan, Zheng list_del(&gang[0]->root_list); 293376dda93cSYan, Zheng 293476dda93cSYan, Zheng if (gang[0]->in_radix) { 293576dda93cSYan, Zheng btrfs_free_fs_root(fs_info, gang[0]); 293676dda93cSYan, Zheng } else { 293776dda93cSYan, Zheng free_extent_buffer(gang[0]->node); 293876dda93cSYan, Zheng free_extent_buffer(gang[0]->commit_root); 293976dda93cSYan, Zheng kfree(gang[0]); 294076dda93cSYan, Zheng } 294176dda93cSYan, Zheng } 294276dda93cSYan, Zheng 29430f7d52f4SChris Mason while (1) { 29440f7d52f4SChris Mason ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 29450f7d52f4SChris Mason (void **)gang, 0, 29460f7d52f4SChris Mason ARRAY_SIZE(gang)); 29470f7d52f4SChris Mason if (!ret) 29480f7d52f4SChris Mason break; 29492619ba1fSChris Mason for (i = 0; i < ret; i++) 29505eda7b5eSChris Mason btrfs_free_fs_root(fs_info, gang[i]); 29510f7d52f4SChris Mason } 29520f7d52f4SChris Mason return 0; 29530f7d52f4SChris Mason } 2954b4100d64SChris Mason 2955c146afadSYan Zheng int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) 2956c146afadSYan Zheng { 2957c146afadSYan Zheng u64 root_objectid = 0; 2958c146afadSYan Zheng struct btrfs_root *gang[8]; 2959c146afadSYan Zheng int i; 2960c146afadSYan Zheng int ret; 2961c146afadSYan Zheng 2962c146afadSYan Zheng while (1) { 2963c146afadSYan Zheng ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 2964c146afadSYan Zheng (void **)gang, root_objectid, 2965c146afadSYan Zheng ARRAY_SIZE(gang)); 2966c146afadSYan Zheng if (!ret) 2967c146afadSYan Zheng break; 29685d4f98a2SYan Zheng 29695d4f98a2SYan Zheng root_objectid = gang[ret - 1]->root_key.objectid + 1; 2970c146afadSYan Zheng for (i = 0; i < ret; i++) { 297166b4ffd1SJosef Bacik int err; 297266b4ffd1SJosef Bacik 2973c146afadSYan Zheng root_objectid = gang[i]->root_key.objectid; 297466b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(gang[i]); 297566b4ffd1SJosef Bacik if (err) 297666b4ffd1SJosef Bacik return err; 2977c146afadSYan Zheng } 2978c146afadSYan Zheng root_objectid++; 2979c146afadSYan Zheng } 2980c146afadSYan Zheng return 0; 2981c146afadSYan Zheng } 2982c146afadSYan Zheng 2983c146afadSYan Zheng int btrfs_commit_super(struct btrfs_root *root) 2984c146afadSYan Zheng { 2985c146afadSYan Zheng struct btrfs_trans_handle *trans; 2986c146afadSYan Zheng int ret; 2987c146afadSYan Zheng 2988c146afadSYan Zheng mutex_lock(&root->fs_info->cleaner_mutex); 298924bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 2990c146afadSYan Zheng btrfs_clean_old_snapshots(root); 2991c146afadSYan Zheng mutex_unlock(&root->fs_info->cleaner_mutex); 2992c71bf099SYan, Zheng 2993c71bf099SYan, Zheng /* wait until ongoing cleanup work done */ 2994c71bf099SYan, Zheng down_write(&root->fs_info->cleanup_work_sem); 2995c71bf099SYan, Zheng up_write(&root->fs_info->cleanup_work_sem); 2996c71bf099SYan, Zheng 29977a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 29983612b495STsutomu Itoh if (IS_ERR(trans)) 29993612b495STsutomu Itoh return PTR_ERR(trans); 3000c146afadSYan Zheng ret = btrfs_commit_transaction(trans, root); 3001c146afadSYan Zheng BUG_ON(ret); 3002c146afadSYan Zheng /* run commit again to drop the original snapshot */ 30037a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 30043612b495STsutomu Itoh if (IS_ERR(trans)) 30053612b495STsutomu Itoh return PTR_ERR(trans); 3006c146afadSYan Zheng btrfs_commit_transaction(trans, root); 3007c146afadSYan Zheng ret = btrfs_write_and_wait_transaction(NULL, root); 3008c146afadSYan Zheng BUG_ON(ret); 3009c146afadSYan Zheng 3010a512bbf8SYan Zheng ret = write_ctree_super(NULL, root, 0); 3011c146afadSYan Zheng return ret; 3012c146afadSYan Zheng } 3013c146afadSYan Zheng 3014e20d96d6SChris Mason int close_ctree(struct btrfs_root *root) 3015eb60ceacSChris Mason { 30160f7d52f4SChris Mason struct btrfs_fs_info *fs_info = root->fs_info; 3017c146afadSYan Zheng int ret; 3018e089f05cSChris Mason 3019facda1e7SChris Mason fs_info->closing = 1; 3020a2135011SChris Mason smp_mb(); 3021a2135011SChris Mason 3022837d5b6eSIlya Dryomov /* pause restriper - we want to resume on mount */ 3023837d5b6eSIlya Dryomov btrfs_pause_balance(root->fs_info); 3024837d5b6eSIlya Dryomov 3025a2de733cSArne Jansen btrfs_scrub_cancel(root); 30264cb5300bSChris Mason 30274cb5300bSChris Mason /* wait for any defraggers to finish */ 30284cb5300bSChris Mason wait_event(fs_info->transaction_wait, 30294cb5300bSChris Mason (atomic_read(&fs_info->defrag_running) == 0)); 30304cb5300bSChris Mason 30314cb5300bSChris Mason /* clear out the rbtree of defraggable inodes */ 30324cb5300bSChris Mason btrfs_run_defrag_inodes(root->fs_info); 30334cb5300bSChris Mason 3034acce952bSliubo /* 3035acce952bSliubo * Here come 2 situations when btrfs is broken to flip readonly: 3036acce952bSliubo * 3037acce952bSliubo * 1. when btrfs flips readonly somewhere else before 3038acce952bSliubo * btrfs_commit_super, sb->s_flags has MS_RDONLY flag, 3039acce952bSliubo * and btrfs will skip to write sb directly to keep 3040acce952bSliubo * ERROR state on disk. 3041acce952bSliubo * 3042acce952bSliubo * 2. when btrfs flips readonly just in btrfs_commit_super, 3043ae0e47f0SJustin P. Mattock * and in such case, btrfs cannot write sb via btrfs_commit_super, 3044acce952bSliubo * and since fs_state has been set BTRFS_SUPER_FLAG_ERROR flag, 3045acce952bSliubo * btrfs will cleanup all FS resources first and write sb then. 3046acce952bSliubo */ 3047c146afadSYan Zheng if (!(fs_info->sb->s_flags & MS_RDONLY)) { 3048c146afadSYan Zheng ret = btrfs_commit_super(root); 3049d397712bSChris Mason if (ret) 3050d397712bSChris Mason printk(KERN_ERR "btrfs: commit super ret %d\n", ret); 3051c146afadSYan Zheng } 3052ed2ff2cbSChris Mason 3053acce952bSliubo if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { 3054acce952bSliubo ret = btrfs_error_commit_super(root); 3055acce952bSliubo if (ret) 3056acce952bSliubo printk(KERN_ERR "btrfs: commit super ret %d\n", ret); 3057acce952bSliubo } 3058acce952bSliubo 3059300e4f8aSJosef Bacik btrfs_put_block_group_cache(fs_info); 3060300e4f8aSJosef Bacik 30618929ecfaSYan, Zheng kthread_stop(root->fs_info->transaction_kthread); 30628929ecfaSYan, Zheng kthread_stop(root->fs_info->cleaner_kthread); 30638929ecfaSYan, Zheng 3064f25784b3SYan Zheng fs_info->closing = 2; 3065f25784b3SYan Zheng smp_mb(); 3066f25784b3SYan Zheng 3067b0c68f8bSChris Mason if (fs_info->delalloc_bytes) { 3068d397712bSChris Mason printk(KERN_INFO "btrfs: at unmount delalloc count %llu\n", 306921380931SJoel Becker (unsigned long long)fs_info->delalloc_bytes); 3070b0c68f8bSChris Mason } 307131153d81SYan Zheng if (fs_info->total_ref_cache_size) { 3072d397712bSChris Mason printk(KERN_INFO "btrfs: at umount reference cache size %llu\n", 3073d397712bSChris Mason (unsigned long long)fs_info->total_ref_cache_size); 307431153d81SYan Zheng } 307531153d81SYan Zheng 30765f39d397SChris Mason free_extent_buffer(fs_info->extent_root->node); 30775d4f98a2SYan Zheng free_extent_buffer(fs_info->extent_root->commit_root); 30785f39d397SChris Mason free_extent_buffer(fs_info->tree_root->node); 30795d4f98a2SYan Zheng free_extent_buffer(fs_info->tree_root->commit_root); 30800b86a832SChris Mason free_extent_buffer(root->fs_info->chunk_root->node); 30815d4f98a2SYan Zheng free_extent_buffer(root->fs_info->chunk_root->commit_root); 30820b86a832SChris Mason free_extent_buffer(root->fs_info->dev_root->node); 30835d4f98a2SYan Zheng free_extent_buffer(root->fs_info->dev_root->commit_root); 3084d20f7043SChris Mason free_extent_buffer(root->fs_info->csum_root->node); 30855d4f98a2SYan Zheng free_extent_buffer(root->fs_info->csum_root->commit_root); 3086d20f7043SChris Mason 30879078a3e1SChris Mason btrfs_free_block_groups(root->fs_info); 3088c146afadSYan Zheng 30890f7d52f4SChris Mason del_fs_roots(fs_info); 3090d10c5f31SChris Mason 3091c146afadSYan Zheng iput(fs_info->btree_inode); 30929ad6b7bcSChris Mason 309361d92c32SChris Mason btrfs_stop_workers(&fs_info->generic_worker); 3094247e743cSChris Mason btrfs_stop_workers(&fs_info->fixup_workers); 3095771ed689SChris Mason btrfs_stop_workers(&fs_info->delalloc_workers); 30968b712842SChris Mason btrfs_stop_workers(&fs_info->workers); 30978b712842SChris Mason btrfs_stop_workers(&fs_info->endio_workers); 3098d20f7043SChris Mason btrfs_stop_workers(&fs_info->endio_meta_workers); 3099cad321adSChris Mason btrfs_stop_workers(&fs_info->endio_meta_write_workers); 3100e6dcd2dcSChris Mason btrfs_stop_workers(&fs_info->endio_write_workers); 31010cb59c99SJosef Bacik btrfs_stop_workers(&fs_info->endio_freespace_worker); 31021cc127b5SChris Mason btrfs_stop_workers(&fs_info->submit_workers); 310316cdcec7SMiao Xie btrfs_stop_workers(&fs_info->delayed_workers); 3104bab39bf9SJosef Bacik btrfs_stop_workers(&fs_info->caching_workers); 310590519d66SArne Jansen btrfs_stop_workers(&fs_info->readahead_workers); 3106d6bfde87SChris Mason 310721adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 310821adbd5cSStefan Behrens if (btrfs_test_opt(root, CHECK_INTEGRITY)) 310921adbd5cSStefan Behrens btrfsic_unmount(root, fs_info->fs_devices); 311021adbd5cSStefan Behrens #endif 311121adbd5cSStefan Behrens 3112dfe25020SChris Mason btrfs_close_devices(fs_info->fs_devices); 31130b86a832SChris Mason btrfs_mapping_tree_free(&fs_info->mapping_tree); 3114b248a415SChris Mason 311504160088SChris Mason bdi_destroy(&fs_info->bdi); 311676dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 31170b86a832SChris Mason 31186c41761fSDavid Sterba free_fs_info(fs_info); 311983a4d548SLi Zefan 3120eb60ceacSChris Mason return 0; 3121eb60ceacSChris Mason } 3122eb60ceacSChris Mason 31231259ab75SChris Mason int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid) 3124ccd467d6SChris Mason { 31251259ab75SChris Mason int ret; 3126810191ffSChris Mason struct inode *btree_inode = buf->first_page->mapping->host; 31271259ab75SChris Mason 31282ac55d41SJosef Bacik ret = extent_buffer_uptodate(&BTRFS_I(btree_inode)->io_tree, buf, 31292ac55d41SJosef Bacik NULL); 31301259ab75SChris Mason if (!ret) 31311259ab75SChris Mason return ret; 31321259ab75SChris Mason 31331259ab75SChris Mason ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, 31341259ab75SChris Mason parent_transid); 31351259ab75SChris Mason return !ret; 31365f39d397SChris Mason } 31376702ed49SChris Mason 31385f39d397SChris Mason int btrfs_set_buffer_uptodate(struct extent_buffer *buf) 31395f39d397SChris Mason { 3140810191ffSChris Mason struct inode *btree_inode = buf->first_page->mapping->host; 3141d1310b2eSChris Mason return set_extent_buffer_uptodate(&BTRFS_I(btree_inode)->io_tree, 31425f39d397SChris Mason buf); 31435f39d397SChris Mason } 31445f39d397SChris Mason 31455f39d397SChris Mason void btrfs_mark_buffer_dirty(struct extent_buffer *buf) 31465f39d397SChris Mason { 3147810191ffSChris Mason struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; 31485f39d397SChris Mason u64 transid = btrfs_header_generation(buf); 31495f39d397SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 3150b9473439SChris Mason int was_dirty; 3151b4ce94deSChris Mason 3152b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 3153ccd467d6SChris Mason if (transid != root->fs_info->generation) { 3154d397712bSChris Mason printk(KERN_CRIT "btrfs transid mismatch buffer %llu, " 3155d397712bSChris Mason "found %llu running %llu\n", 3156db94535dSChris Mason (unsigned long long)buf->start, 3157d397712bSChris Mason (unsigned long long)transid, 3158d397712bSChris Mason (unsigned long long)root->fs_info->generation); 3159ccd467d6SChris Mason WARN_ON(1); 3160ccd467d6SChris Mason } 3161b9473439SChris Mason was_dirty = set_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, 3162b9473439SChris Mason buf); 3163b9473439SChris Mason if (!was_dirty) { 3164b9473439SChris Mason spin_lock(&root->fs_info->delalloc_lock); 3165b9473439SChris Mason root->fs_info->dirty_metadata_bytes += buf->len; 3166b9473439SChris Mason spin_unlock(&root->fs_info->delalloc_lock); 3167b9473439SChris Mason } 3168eb60ceacSChris Mason } 3169eb60ceacSChris Mason 3170d3c2fdcfSChris Mason void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) 317135b7e476SChris Mason { 3172188de649SChris Mason /* 3173188de649SChris Mason * looks as though older kernels can get into trouble with 3174188de649SChris Mason * this code, they end up stuck in balance_dirty_pages forever 3175188de649SChris Mason */ 3176d6bfde87SChris Mason u64 num_dirty; 3177771ed689SChris Mason unsigned long thresh = 32 * 1024 * 1024; 3178d6bfde87SChris Mason 31796933c02eSJens Axboe if (current->flags & PF_MEMALLOC) 3180d6bfde87SChris Mason return; 3181d6bfde87SChris Mason 318216cdcec7SMiao Xie btrfs_balance_delayed_items(root); 318316cdcec7SMiao Xie 318416cdcec7SMiao Xie num_dirty = root->fs_info->dirty_metadata_bytes; 318516cdcec7SMiao Xie 318616cdcec7SMiao Xie if (num_dirty > thresh) { 318716cdcec7SMiao Xie balance_dirty_pages_ratelimited_nr( 318816cdcec7SMiao Xie root->fs_info->btree_inode->i_mapping, 1); 318916cdcec7SMiao Xie } 319016cdcec7SMiao Xie return; 319116cdcec7SMiao Xie } 319216cdcec7SMiao Xie 319316cdcec7SMiao Xie void __btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) 319416cdcec7SMiao Xie { 319516cdcec7SMiao Xie /* 319616cdcec7SMiao Xie * looks as though older kernels can get into trouble with 319716cdcec7SMiao Xie * this code, they end up stuck in balance_dirty_pages forever 319816cdcec7SMiao Xie */ 319916cdcec7SMiao Xie u64 num_dirty; 320016cdcec7SMiao Xie unsigned long thresh = 32 * 1024 * 1024; 320116cdcec7SMiao Xie 320216cdcec7SMiao Xie if (current->flags & PF_MEMALLOC) 320316cdcec7SMiao Xie return; 320416cdcec7SMiao Xie 3205585ad2c3SChris Mason num_dirty = root->fs_info->dirty_metadata_bytes; 3206585ad2c3SChris Mason 3207d6bfde87SChris Mason if (num_dirty > thresh) { 3208d3c2fdcfSChris Mason balance_dirty_pages_ratelimited_nr( 3209304fced6SChris Mason root->fs_info->btree_inode->i_mapping, 1); 321035b7e476SChris Mason } 3211188de649SChris Mason return; 3212d6bfde87SChris Mason } 32136b80053dSChris Mason 3214ca7a79adSChris Mason int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) 32156b80053dSChris Mason { 3216810191ffSChris Mason struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; 3217ce9adaa5SChris Mason int ret; 3218ca7a79adSChris Mason ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 3219d397712bSChris Mason if (ret == 0) 3220b4ce94deSChris Mason set_bit(EXTENT_BUFFER_UPTODATE, &buf->bflags); 3221ce9adaa5SChris Mason return ret; 32226b80053dSChris Mason } 32230da5468fSChris Mason 322401d658f2SChris Mason static int btree_lock_page_hook(struct page *page, void *data, 322501d658f2SChris Mason void (*flush_fn)(void *)) 32264bef0848SChris Mason { 32274bef0848SChris Mason struct inode *inode = page->mapping->host; 3228b9473439SChris Mason struct btrfs_root *root = BTRFS_I(inode)->root; 32294bef0848SChris Mason struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; 32304bef0848SChris Mason struct extent_buffer *eb; 32314bef0848SChris Mason unsigned long len; 32324bef0848SChris Mason u64 bytenr = page_offset(page); 32334bef0848SChris Mason 32344bef0848SChris Mason if (page->private == EXTENT_PAGE_PRIVATE) 32354bef0848SChris Mason goto out; 32364bef0848SChris Mason 32374bef0848SChris Mason len = page->private >> 2; 3238f09d1f60SDavid Sterba eb = find_extent_buffer(io_tree, bytenr, len); 32394bef0848SChris Mason if (!eb) 32404bef0848SChris Mason goto out; 32414bef0848SChris Mason 324201d658f2SChris Mason if (!btrfs_try_tree_write_lock(eb)) { 324301d658f2SChris Mason flush_fn(data); 32444bef0848SChris Mason btrfs_tree_lock(eb); 324501d658f2SChris Mason } 32464bef0848SChris Mason btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN); 3247b9473439SChris Mason 3248b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)) { 3249b9473439SChris Mason spin_lock(&root->fs_info->delalloc_lock); 3250b9473439SChris Mason if (root->fs_info->dirty_metadata_bytes >= eb->len) 3251b9473439SChris Mason root->fs_info->dirty_metadata_bytes -= eb->len; 3252b9473439SChris Mason else 3253b9473439SChris Mason WARN_ON(1); 3254b9473439SChris Mason spin_unlock(&root->fs_info->delalloc_lock); 3255b9473439SChris Mason } 3256b9473439SChris Mason 32574bef0848SChris Mason btrfs_tree_unlock(eb); 32584bef0848SChris Mason free_extent_buffer(eb); 32594bef0848SChris Mason out: 326001d658f2SChris Mason if (!trylock_page(page)) { 326101d658f2SChris Mason flush_fn(data); 32624bef0848SChris Mason lock_page(page); 326301d658f2SChris Mason } 32644bef0848SChris Mason return 0; 32654bef0848SChris Mason } 32664bef0848SChris Mason 3267acce952bSliubo static void btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 3268acce952bSliubo int read_only) 3269acce952bSliubo { 3270acce952bSliubo if (read_only) 3271acce952bSliubo return; 3272acce952bSliubo 3273acce952bSliubo if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) 3274acce952bSliubo printk(KERN_WARNING "warning: mount fs with errors, " 3275acce952bSliubo "running btrfsck is recommended\n"); 3276acce952bSliubo } 3277acce952bSliubo 3278acce952bSliubo int btrfs_error_commit_super(struct btrfs_root *root) 3279acce952bSliubo { 3280acce952bSliubo int ret; 3281acce952bSliubo 3282acce952bSliubo mutex_lock(&root->fs_info->cleaner_mutex); 3283acce952bSliubo btrfs_run_delayed_iputs(root); 3284acce952bSliubo mutex_unlock(&root->fs_info->cleaner_mutex); 3285acce952bSliubo 3286acce952bSliubo down_write(&root->fs_info->cleanup_work_sem); 3287acce952bSliubo up_write(&root->fs_info->cleanup_work_sem); 3288acce952bSliubo 3289acce952bSliubo /* cleanup FS via transaction */ 3290acce952bSliubo btrfs_cleanup_transaction(root); 3291acce952bSliubo 3292acce952bSliubo ret = write_ctree_super(NULL, root, 0); 3293acce952bSliubo 3294acce952bSliubo return ret; 3295acce952bSliubo } 3296acce952bSliubo 3297acce952bSliubo static int btrfs_destroy_ordered_operations(struct btrfs_root *root) 3298acce952bSliubo { 3299acce952bSliubo struct btrfs_inode *btrfs_inode; 3300acce952bSliubo struct list_head splice; 3301acce952bSliubo 3302acce952bSliubo INIT_LIST_HEAD(&splice); 3303acce952bSliubo 3304acce952bSliubo mutex_lock(&root->fs_info->ordered_operations_mutex); 3305acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3306acce952bSliubo 3307acce952bSliubo list_splice_init(&root->fs_info->ordered_operations, &splice); 3308acce952bSliubo while (!list_empty(&splice)) { 3309acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3310acce952bSliubo ordered_operations); 3311acce952bSliubo 3312acce952bSliubo list_del_init(&btrfs_inode->ordered_operations); 3313acce952bSliubo 3314acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3315acce952bSliubo } 3316acce952bSliubo 3317acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3318acce952bSliubo mutex_unlock(&root->fs_info->ordered_operations_mutex); 3319acce952bSliubo 3320acce952bSliubo return 0; 3321acce952bSliubo } 3322acce952bSliubo 3323acce952bSliubo static int btrfs_destroy_ordered_extents(struct btrfs_root *root) 3324acce952bSliubo { 3325acce952bSliubo struct list_head splice; 3326acce952bSliubo struct btrfs_ordered_extent *ordered; 3327acce952bSliubo struct inode *inode; 3328acce952bSliubo 3329acce952bSliubo INIT_LIST_HEAD(&splice); 3330acce952bSliubo 3331acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3332acce952bSliubo 3333acce952bSliubo list_splice_init(&root->fs_info->ordered_extents, &splice); 3334acce952bSliubo while (!list_empty(&splice)) { 3335acce952bSliubo ordered = list_entry(splice.next, struct btrfs_ordered_extent, 3336acce952bSliubo root_extent_list); 3337acce952bSliubo 3338acce952bSliubo list_del_init(&ordered->root_extent_list); 3339acce952bSliubo atomic_inc(&ordered->refs); 3340acce952bSliubo 3341acce952bSliubo /* the inode may be getting freed (in sys_unlink path). */ 3342acce952bSliubo inode = igrab(ordered->inode); 3343acce952bSliubo 3344acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3345acce952bSliubo if (inode) 3346acce952bSliubo iput(inode); 3347acce952bSliubo 3348acce952bSliubo atomic_set(&ordered->refs, 1); 3349acce952bSliubo btrfs_put_ordered_extent(ordered); 3350acce952bSliubo 3351acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3352acce952bSliubo } 3353acce952bSliubo 3354acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3355acce952bSliubo 3356acce952bSliubo return 0; 3357acce952bSliubo } 3358acce952bSliubo 3359acce952bSliubo static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 3360acce952bSliubo struct btrfs_root *root) 3361acce952bSliubo { 3362acce952bSliubo struct rb_node *node; 3363acce952bSliubo struct btrfs_delayed_ref_root *delayed_refs; 3364acce952bSliubo struct btrfs_delayed_ref_node *ref; 3365acce952bSliubo int ret = 0; 3366acce952bSliubo 3367acce952bSliubo delayed_refs = &trans->delayed_refs; 3368acce952bSliubo 3369acce952bSliubo spin_lock(&delayed_refs->lock); 3370acce952bSliubo if (delayed_refs->num_entries == 0) { 3371cfece4dbSDavid Sterba spin_unlock(&delayed_refs->lock); 3372acce952bSliubo printk(KERN_INFO "delayed_refs has NO entry\n"); 3373acce952bSliubo return ret; 3374acce952bSliubo } 3375acce952bSliubo 3376acce952bSliubo node = rb_first(&delayed_refs->root); 3377acce952bSliubo while (node) { 3378acce952bSliubo ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node); 3379acce952bSliubo node = rb_next(node); 3380acce952bSliubo 3381acce952bSliubo ref->in_tree = 0; 3382acce952bSliubo rb_erase(&ref->rb_node, &delayed_refs->root); 3383acce952bSliubo delayed_refs->num_entries--; 3384acce952bSliubo 3385acce952bSliubo atomic_set(&ref->refs, 1); 3386acce952bSliubo if (btrfs_delayed_ref_is_head(ref)) { 3387acce952bSliubo struct btrfs_delayed_ref_head *head; 3388acce952bSliubo 3389acce952bSliubo head = btrfs_delayed_node_to_head(ref); 3390acce952bSliubo mutex_lock(&head->mutex); 3391acce952bSliubo kfree(head->extent_op); 3392acce952bSliubo delayed_refs->num_heads--; 3393acce952bSliubo if (list_empty(&head->cluster)) 3394acce952bSliubo delayed_refs->num_heads_ready--; 3395acce952bSliubo list_del_init(&head->cluster); 3396acce952bSliubo mutex_unlock(&head->mutex); 3397acce952bSliubo } 3398acce952bSliubo 3399acce952bSliubo spin_unlock(&delayed_refs->lock); 3400acce952bSliubo btrfs_put_delayed_ref(ref); 3401acce952bSliubo 3402acce952bSliubo cond_resched(); 3403acce952bSliubo spin_lock(&delayed_refs->lock); 3404acce952bSliubo } 3405acce952bSliubo 3406acce952bSliubo spin_unlock(&delayed_refs->lock); 3407acce952bSliubo 3408acce952bSliubo return ret; 3409acce952bSliubo } 3410acce952bSliubo 3411acce952bSliubo static int btrfs_destroy_pending_snapshots(struct btrfs_transaction *t) 3412acce952bSliubo { 3413acce952bSliubo struct btrfs_pending_snapshot *snapshot; 3414acce952bSliubo struct list_head splice; 3415acce952bSliubo 3416acce952bSliubo INIT_LIST_HEAD(&splice); 3417acce952bSliubo 3418acce952bSliubo list_splice_init(&t->pending_snapshots, &splice); 3419acce952bSliubo 3420acce952bSliubo while (!list_empty(&splice)) { 3421acce952bSliubo snapshot = list_entry(splice.next, 3422acce952bSliubo struct btrfs_pending_snapshot, 3423acce952bSliubo list); 3424acce952bSliubo 3425acce952bSliubo list_del_init(&snapshot->list); 3426acce952bSliubo 3427acce952bSliubo kfree(snapshot); 3428acce952bSliubo } 3429acce952bSliubo 3430acce952bSliubo return 0; 3431acce952bSliubo } 3432acce952bSliubo 3433acce952bSliubo static int btrfs_destroy_delalloc_inodes(struct btrfs_root *root) 3434acce952bSliubo { 3435acce952bSliubo struct btrfs_inode *btrfs_inode; 3436acce952bSliubo struct list_head splice; 3437acce952bSliubo 3438acce952bSliubo INIT_LIST_HEAD(&splice); 3439acce952bSliubo 3440acce952bSliubo spin_lock(&root->fs_info->delalloc_lock); 34415be76758SDavid Sterba list_splice_init(&root->fs_info->delalloc_inodes, &splice); 3442acce952bSliubo 3443acce952bSliubo while (!list_empty(&splice)) { 3444acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3445acce952bSliubo delalloc_inodes); 3446acce952bSliubo 3447acce952bSliubo list_del_init(&btrfs_inode->delalloc_inodes); 3448acce952bSliubo 3449acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3450acce952bSliubo } 3451acce952bSliubo 3452acce952bSliubo spin_unlock(&root->fs_info->delalloc_lock); 3453acce952bSliubo 3454acce952bSliubo return 0; 3455acce952bSliubo } 3456acce952bSliubo 3457acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 3458acce952bSliubo struct extent_io_tree *dirty_pages, 3459acce952bSliubo int mark) 3460acce952bSliubo { 3461acce952bSliubo int ret; 3462acce952bSliubo struct page *page; 3463acce952bSliubo struct inode *btree_inode = root->fs_info->btree_inode; 3464acce952bSliubo struct extent_buffer *eb; 3465acce952bSliubo u64 start = 0; 3466acce952bSliubo u64 end; 3467acce952bSliubo u64 offset; 3468acce952bSliubo unsigned long index; 3469acce952bSliubo 3470acce952bSliubo while (1) { 3471acce952bSliubo ret = find_first_extent_bit(dirty_pages, start, &start, &end, 3472acce952bSliubo mark); 3473acce952bSliubo if (ret) 3474acce952bSliubo break; 3475acce952bSliubo 3476acce952bSliubo clear_extent_bits(dirty_pages, start, end, mark, GFP_NOFS); 3477acce952bSliubo while (start <= end) { 3478acce952bSliubo index = start >> PAGE_CACHE_SHIFT; 3479acce952bSliubo start = (u64)(index + 1) << PAGE_CACHE_SHIFT; 3480acce952bSliubo page = find_get_page(btree_inode->i_mapping, index); 3481acce952bSliubo if (!page) 3482acce952bSliubo continue; 3483acce952bSliubo offset = page_offset(page); 3484acce952bSliubo 3485acce952bSliubo spin_lock(&dirty_pages->buffer_lock); 3486acce952bSliubo eb = radix_tree_lookup( 3487acce952bSliubo &(&BTRFS_I(page->mapping->host)->io_tree)->buffer, 3488acce952bSliubo offset >> PAGE_CACHE_SHIFT); 3489acce952bSliubo spin_unlock(&dirty_pages->buffer_lock); 3490acce952bSliubo if (eb) { 3491acce952bSliubo ret = test_and_clear_bit(EXTENT_BUFFER_DIRTY, 3492acce952bSliubo &eb->bflags); 3493acce952bSliubo atomic_set(&eb->refs, 1); 3494acce952bSliubo } 3495acce952bSliubo if (PageWriteback(page)) 3496acce952bSliubo end_page_writeback(page); 3497acce952bSliubo 3498acce952bSliubo lock_page(page); 3499acce952bSliubo if (PageDirty(page)) { 3500acce952bSliubo clear_page_dirty_for_io(page); 3501acce952bSliubo spin_lock_irq(&page->mapping->tree_lock); 3502acce952bSliubo radix_tree_tag_clear(&page->mapping->page_tree, 3503acce952bSliubo page_index(page), 3504acce952bSliubo PAGECACHE_TAG_DIRTY); 3505acce952bSliubo spin_unlock_irq(&page->mapping->tree_lock); 3506acce952bSliubo } 3507acce952bSliubo 3508acce952bSliubo page->mapping->a_ops->invalidatepage(page, 0); 3509acce952bSliubo unlock_page(page); 3510acce952bSliubo } 3511acce952bSliubo } 3512acce952bSliubo 3513acce952bSliubo return ret; 3514acce952bSliubo } 3515acce952bSliubo 3516acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 3517acce952bSliubo struct extent_io_tree *pinned_extents) 3518acce952bSliubo { 3519acce952bSliubo struct extent_io_tree *unpin; 3520acce952bSliubo u64 start; 3521acce952bSliubo u64 end; 3522acce952bSliubo int ret; 3523acce952bSliubo 3524acce952bSliubo unpin = pinned_extents; 3525acce952bSliubo while (1) { 3526acce952bSliubo ret = find_first_extent_bit(unpin, 0, &start, &end, 3527acce952bSliubo EXTENT_DIRTY); 3528acce952bSliubo if (ret) 3529acce952bSliubo break; 3530acce952bSliubo 3531acce952bSliubo /* opt_discard */ 35325378e607SLi Dongyang if (btrfs_test_opt(root, DISCARD)) 35335378e607SLi Dongyang ret = btrfs_error_discard_extent(root, start, 35345378e607SLi Dongyang end + 1 - start, 35355378e607SLi Dongyang NULL); 3536acce952bSliubo 3537acce952bSliubo clear_extent_dirty(unpin, start, end, GFP_NOFS); 3538acce952bSliubo btrfs_error_unpin_extent_range(root, start, end); 3539acce952bSliubo cond_resched(); 3540acce952bSliubo } 3541acce952bSliubo 3542acce952bSliubo return 0; 3543acce952bSliubo } 3544acce952bSliubo 3545acce952bSliubo static int btrfs_cleanup_transaction(struct btrfs_root *root) 3546acce952bSliubo { 3547acce952bSliubo struct btrfs_transaction *t; 3548acce952bSliubo LIST_HEAD(list); 3549acce952bSliubo 3550acce952bSliubo WARN_ON(1); 3551acce952bSliubo 3552acce952bSliubo mutex_lock(&root->fs_info->transaction_kthread_mutex); 3553acce952bSliubo 3554a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3555acce952bSliubo list_splice_init(&root->fs_info->trans_list, &list); 3556a4abeea4SJosef Bacik root->fs_info->trans_no_join = 1; 3557a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3558a4abeea4SJosef Bacik 3559acce952bSliubo while (!list_empty(&list)) { 3560acce952bSliubo t = list_entry(list.next, struct btrfs_transaction, list); 3561acce952bSliubo if (!t) 3562acce952bSliubo break; 3563acce952bSliubo 3564acce952bSliubo btrfs_destroy_ordered_operations(root); 3565acce952bSliubo 3566acce952bSliubo btrfs_destroy_ordered_extents(root); 3567acce952bSliubo 3568acce952bSliubo btrfs_destroy_delayed_refs(t, root); 3569acce952bSliubo 3570acce952bSliubo btrfs_block_rsv_release(root, 3571acce952bSliubo &root->fs_info->trans_block_rsv, 3572acce952bSliubo t->dirty_pages.dirty_bytes); 3573acce952bSliubo 3574acce952bSliubo /* FIXME: cleanup wait for commit */ 3575acce952bSliubo t->in_commit = 1; 3576acce952bSliubo t->blocked = 1; 3577acce952bSliubo if (waitqueue_active(&root->fs_info->transaction_blocked_wait)) 3578acce952bSliubo wake_up(&root->fs_info->transaction_blocked_wait); 3579acce952bSliubo 3580acce952bSliubo t->blocked = 0; 3581acce952bSliubo if (waitqueue_active(&root->fs_info->transaction_wait)) 3582acce952bSliubo wake_up(&root->fs_info->transaction_wait); 3583acce952bSliubo 3584acce952bSliubo t->commit_done = 1; 3585acce952bSliubo if (waitqueue_active(&t->commit_wait)) 3586acce952bSliubo wake_up(&t->commit_wait); 3587acce952bSliubo 3588acce952bSliubo btrfs_destroy_pending_snapshots(t); 3589acce952bSliubo 3590acce952bSliubo btrfs_destroy_delalloc_inodes(root); 3591acce952bSliubo 3592a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3593acce952bSliubo root->fs_info->running_transaction = NULL; 3594a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3595acce952bSliubo 3596acce952bSliubo btrfs_destroy_marked_extents(root, &t->dirty_pages, 3597acce952bSliubo EXTENT_DIRTY); 3598acce952bSliubo 3599acce952bSliubo btrfs_destroy_pinned_extent(root, 3600acce952bSliubo root->fs_info->pinned_extents); 3601acce952bSliubo 360213c5a93eSJosef Bacik atomic_set(&t->use_count, 0); 3603acce952bSliubo list_del_init(&t->list); 3604acce952bSliubo memset(t, 0, sizeof(*t)); 3605acce952bSliubo kmem_cache_free(btrfs_transaction_cachep, t); 3606acce952bSliubo } 3607acce952bSliubo 3608a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3609a4abeea4SJosef Bacik root->fs_info->trans_no_join = 0; 3610a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3611acce952bSliubo mutex_unlock(&root->fs_info->transaction_kthread_mutex); 3612acce952bSliubo 3613acce952bSliubo return 0; 3614acce952bSliubo } 3615acce952bSliubo 3616d1310b2eSChris Mason static struct extent_io_ops btree_extent_io_ops = { 36174bef0848SChris Mason .write_cache_pages_lock_hook = btree_lock_page_hook, 3618ce9adaa5SChris Mason .readpage_end_io_hook = btree_readpage_end_io_hook, 36194bb31e92SArne Jansen .readpage_io_failed_hook = btree_io_failed_hook, 36200b86a832SChris Mason .submit_bio_hook = btree_submit_bio_hook, 3621239b14b3SChris Mason /* note we're sharing with inode.c for the merge bio hook */ 3622239b14b3SChris Mason .merge_bio_hook = btrfs_merge_bio_hook, 36230da5468fSChris Mason }; 3624