16cbd5570SChris Mason /* 26cbd5570SChris Mason * Copyright (C) 2007 Oracle. All rights reserved. 36cbd5570SChris Mason * 46cbd5570SChris Mason * This program is free software; you can redistribute it and/or 56cbd5570SChris Mason * modify it under the terms of the GNU General Public 66cbd5570SChris Mason * License v2 as published by the Free Software Foundation. 76cbd5570SChris Mason * 86cbd5570SChris Mason * This program is distributed in the hope that it will be useful, 96cbd5570SChris Mason * but WITHOUT ANY WARRANTY; without even the implied warranty of 106cbd5570SChris Mason * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 116cbd5570SChris Mason * General Public License for more details. 126cbd5570SChris Mason * 136cbd5570SChris Mason * You should have received a copy of the GNU General Public 146cbd5570SChris Mason * License along with this program; if not, write to the 156cbd5570SChris Mason * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 166cbd5570SChris Mason * Boston, MA 021110-1307, USA. 176cbd5570SChris Mason */ 186cbd5570SChris Mason 19e20d96d6SChris Mason #include <linux/fs.h> 20d98237b3SChris Mason #include <linux/blkdev.h> 2187cbda5cSChris Mason #include <linux/scatterlist.h> 2222b0ebdaSChris Mason #include <linux/swap.h> 230f7d52f4SChris Mason #include <linux/radix-tree.h> 2435b7e476SChris Mason #include <linux/writeback.h> 25d397712bSChris Mason #include <linux/buffer_head.h> 26ce9adaa5SChris Mason #include <linux/workqueue.h> 27a74a4b97SChris Mason #include <linux/kthread.h> 28a74a4b97SChris Mason #include <linux/freezer.h> 29163e783eSDavid Woodhouse #include <linux/crc32c.h> 305a0e3ad6STejun Heo #include <linux/slab.h> 31784b4e29SChris Mason #include <linux/migrate.h> 327a36ddecSDavid Sterba #include <linux/ratelimit.h> 337e75bf3fSDavid Sterba #include <asm/unaligned.h> 344b4e25f2SChris Mason #include "compat.h" 35eb60ceacSChris Mason #include "ctree.h" 36eb60ceacSChris Mason #include "disk-io.h" 37e089f05cSChris Mason #include "transaction.h" 380f7d52f4SChris Mason #include "btrfs_inode.h" 390b86a832SChris Mason #include "volumes.h" 40db94535dSChris Mason #include "print-tree.h" 418b712842SChris Mason #include "async-thread.h" 42925baeddSChris Mason #include "locking.h" 43e02119d5SChris Mason #include "tree-log.h" 44fa9c0d79SChris Mason #include "free-space-cache.h" 45581bb050SLi Zefan #include "inode-map.h" 4621adbd5cSStefan Behrens #include "check-integrity.h" 47606686eeSJosef Bacik #include "rcu-string.h" 488dabb742SStefan Behrens #include "dev-replace.h" 49eb60ceacSChris Mason 50de0022b9SJosef Bacik #ifdef CONFIG_X86 51de0022b9SJosef Bacik #include <asm/cpufeature.h> 52de0022b9SJosef Bacik #endif 53de0022b9SJosef Bacik 54d1310b2eSChris Mason static struct extent_io_ops btree_extent_io_ops; 558b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work); 564df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root); 57fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 58acce952bSliubo int read_only); 59143bede5SJeff Mahoney static void btrfs_destroy_ordered_operations(struct btrfs_root *root); 60143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root); 61acce952bSliubo static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 62acce952bSliubo struct btrfs_root *root); 63143bede5SJeff Mahoney static void btrfs_destroy_pending_snapshots(struct btrfs_transaction *t); 64143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); 65acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 66acce952bSliubo struct extent_io_tree *dirty_pages, 67acce952bSliubo int mark); 68acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 69acce952bSliubo struct extent_io_tree *pinned_extents); 70ce9adaa5SChris Mason 71d352ac68SChris Mason /* 72d352ac68SChris Mason * end_io_wq structs are used to do processing in task context when an IO is 73d352ac68SChris Mason * complete. This is used during reads to verify checksums, and it is used 74d352ac68SChris Mason * by writes to insert metadata for new file extents after IO is complete. 75d352ac68SChris Mason */ 76ce9adaa5SChris Mason struct end_io_wq { 77ce9adaa5SChris Mason struct bio *bio; 78ce9adaa5SChris Mason bio_end_io_t *end_io; 79ce9adaa5SChris Mason void *private; 80ce9adaa5SChris Mason struct btrfs_fs_info *info; 81ce9adaa5SChris Mason int error; 8222c59948SChris Mason int metadata; 83ce9adaa5SChris Mason struct list_head list; 848b712842SChris Mason struct btrfs_work work; 85ce9adaa5SChris Mason }; 860da5468fSChris Mason 87d352ac68SChris Mason /* 88d352ac68SChris Mason * async submit bios are used to offload expensive checksumming 89d352ac68SChris Mason * onto the worker threads. They checksum file and metadata bios 90d352ac68SChris Mason * just before they are sent down the IO stack. 91d352ac68SChris Mason */ 9244b8bd7eSChris Mason struct async_submit_bio { 9344b8bd7eSChris Mason struct inode *inode; 9444b8bd7eSChris Mason struct bio *bio; 9544b8bd7eSChris Mason struct list_head list; 964a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start; 974a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done; 9844b8bd7eSChris Mason int rw; 9944b8bd7eSChris Mason int mirror_num; 100c8b97818SChris Mason unsigned long bio_flags; 101eaf25d93SChris Mason /* 102eaf25d93SChris Mason * bio_offset is optional, can be used if the pages in the bio 103eaf25d93SChris Mason * can't tell us where in the file the bio should go 104eaf25d93SChris Mason */ 105eaf25d93SChris Mason u64 bio_offset; 1068b712842SChris Mason struct btrfs_work work; 10779787eaaSJeff Mahoney int error; 10844b8bd7eSChris Mason }; 10944b8bd7eSChris Mason 11085d4e461SChris Mason /* 11185d4e461SChris Mason * Lockdep class keys for extent_buffer->lock's in this root. For a given 11285d4e461SChris Mason * eb, the lockdep key is determined by the btrfs_root it belongs to and 11385d4e461SChris Mason * the level the eb occupies in the tree. 1144008c04aSChris Mason * 11585d4e461SChris Mason * Different roots are used for different purposes and may nest inside each 11685d4e461SChris Mason * other and they require separate keysets. As lockdep keys should be 11785d4e461SChris Mason * static, assign keysets according to the purpose of the root as indicated 11885d4e461SChris Mason * by btrfs_root->objectid. This ensures that all special purpose roots 11985d4e461SChris Mason * have separate keysets. 1204008c04aSChris Mason * 12185d4e461SChris Mason * Lock-nesting across peer nodes is always done with the immediate parent 12285d4e461SChris Mason * node locked thus preventing deadlock. As lockdep doesn't know this, use 12385d4e461SChris Mason * subclass to avoid triggering lockdep warning in such cases. 1244008c04aSChris Mason * 12585d4e461SChris Mason * The key is set by the readpage_end_io_hook after the buffer has passed 12685d4e461SChris Mason * csum validation but before the pages are unlocked. It is also set by 12785d4e461SChris Mason * btrfs_init_new_buffer on freshly allocated blocks. 12885d4e461SChris Mason * 12985d4e461SChris Mason * We also add a check to make sure the highest level of the tree is the 13085d4e461SChris Mason * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code 13185d4e461SChris Mason * needs update as well. 1324008c04aSChris Mason */ 1334008c04aSChris Mason #ifdef CONFIG_DEBUG_LOCK_ALLOC 1344008c04aSChris Mason # if BTRFS_MAX_LEVEL != 8 1354008c04aSChris Mason # error 1364008c04aSChris Mason # endif 13785d4e461SChris Mason 13885d4e461SChris Mason static struct btrfs_lockdep_keyset { 13985d4e461SChris Mason u64 id; /* root objectid */ 14085d4e461SChris Mason const char *name_stem; /* lock name stem */ 14185d4e461SChris Mason char names[BTRFS_MAX_LEVEL + 1][20]; 14285d4e461SChris Mason struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; 14385d4e461SChris Mason } btrfs_lockdep_keysets[] = { 14485d4e461SChris Mason { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, 14585d4e461SChris Mason { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, 14685d4e461SChris Mason { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, 14785d4e461SChris Mason { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, 14885d4e461SChris Mason { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, 14985d4e461SChris Mason { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, 15085d4e461SChris Mason { .id = BTRFS_ORPHAN_OBJECTID, .name_stem = "orphan" }, 15185d4e461SChris Mason { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, 15285d4e461SChris Mason { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, 15385d4e461SChris Mason { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, 15485d4e461SChris Mason { .id = 0, .name_stem = "tree" }, 1554008c04aSChris Mason }; 15685d4e461SChris Mason 15785d4e461SChris Mason void __init btrfs_init_lockdep(void) 15885d4e461SChris Mason { 15985d4e461SChris Mason int i, j; 16085d4e461SChris Mason 16185d4e461SChris Mason /* initialize lockdep class names */ 16285d4e461SChris Mason for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { 16385d4e461SChris Mason struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; 16485d4e461SChris Mason 16585d4e461SChris Mason for (j = 0; j < ARRAY_SIZE(ks->names); j++) 16685d4e461SChris Mason snprintf(ks->names[j], sizeof(ks->names[j]), 16785d4e461SChris Mason "btrfs-%s-%02d", ks->name_stem, j); 16885d4e461SChris Mason } 16985d4e461SChris Mason } 17085d4e461SChris Mason 17185d4e461SChris Mason void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, 17285d4e461SChris Mason int level) 17385d4e461SChris Mason { 17485d4e461SChris Mason struct btrfs_lockdep_keyset *ks; 17585d4e461SChris Mason 17685d4e461SChris Mason BUG_ON(level >= ARRAY_SIZE(ks->keys)); 17785d4e461SChris Mason 17885d4e461SChris Mason /* find the matching keyset, id 0 is the default entry */ 17985d4e461SChris Mason for (ks = btrfs_lockdep_keysets; ks->id; ks++) 18085d4e461SChris Mason if (ks->id == objectid) 18185d4e461SChris Mason break; 18285d4e461SChris Mason 18385d4e461SChris Mason lockdep_set_class_and_name(&eb->lock, 18485d4e461SChris Mason &ks->keys[level], ks->names[level]); 18585d4e461SChris Mason } 18685d4e461SChris Mason 1874008c04aSChris Mason #endif 1884008c04aSChris Mason 189d352ac68SChris Mason /* 190d352ac68SChris Mason * extents on the btree inode are pretty simple, there's one extent 191d352ac68SChris Mason * that covers the entire device 192d352ac68SChris Mason */ 193b2950863SChristoph Hellwig static struct extent_map *btree_get_extent(struct inode *inode, 194306e16ceSDavid Sterba struct page *page, size_t pg_offset, u64 start, u64 len, 1955f39d397SChris Mason int create) 1965f39d397SChris Mason { 1975f39d397SChris Mason struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; 1985f39d397SChris Mason struct extent_map *em; 1995f39d397SChris Mason int ret; 2005f39d397SChris Mason 201890871beSChris Mason read_lock(&em_tree->lock); 202d1310b2eSChris Mason em = lookup_extent_mapping(em_tree, start, len); 203a061fc8dSChris Mason if (em) { 204a061fc8dSChris Mason em->bdev = 205a061fc8dSChris Mason BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 206890871beSChris Mason read_unlock(&em_tree->lock); 2075f39d397SChris Mason goto out; 208a061fc8dSChris Mason } 209890871beSChris Mason read_unlock(&em_tree->lock); 2107b13b7b1SChris Mason 211172ddd60SDavid Sterba em = alloc_extent_map(); 2125f39d397SChris Mason if (!em) { 2135f39d397SChris Mason em = ERR_PTR(-ENOMEM); 2145f39d397SChris Mason goto out; 2155f39d397SChris Mason } 2165f39d397SChris Mason em->start = 0; 2170afbaf8cSChris Mason em->len = (u64)-1; 218c8b97818SChris Mason em->block_len = (u64)-1; 2195f39d397SChris Mason em->block_start = 0; 220a061fc8dSChris Mason em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 221d1310b2eSChris Mason 222890871beSChris Mason write_lock(&em_tree->lock); 2235f39d397SChris Mason ret = add_extent_mapping(em_tree, em); 2245f39d397SChris Mason if (ret == -EEXIST) { 2255f39d397SChris Mason free_extent_map(em); 2267b13b7b1SChris Mason em = lookup_extent_mapping(em_tree, start, len); 227b4f359abSTsutomu Itoh if (!em) 2280433f20dSTsutomu Itoh em = ERR_PTR(-EIO); 2295f39d397SChris Mason } else if (ret) { 2307b13b7b1SChris Mason free_extent_map(em); 2310433f20dSTsutomu Itoh em = ERR_PTR(ret); 2325f39d397SChris Mason } 233890871beSChris Mason write_unlock(&em_tree->lock); 2347b13b7b1SChris Mason 2355f39d397SChris Mason out: 2365f39d397SChris Mason return em; 2375f39d397SChris Mason } 2385f39d397SChris Mason 23919c00ddcSChris Mason u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len) 24019c00ddcSChris Mason { 241163e783eSDavid Woodhouse return crc32c(seed, data, len); 24219c00ddcSChris Mason } 24319c00ddcSChris Mason 24419c00ddcSChris Mason void btrfs_csum_final(u32 crc, char *result) 24519c00ddcSChris Mason { 2467e75bf3fSDavid Sterba put_unaligned_le32(~crc, result); 24719c00ddcSChris Mason } 24819c00ddcSChris Mason 249d352ac68SChris Mason /* 250d352ac68SChris Mason * compute the csum for a btree block, and either verify it or write it 251d352ac68SChris Mason * into the csum field of the block. 252d352ac68SChris Mason */ 25319c00ddcSChris Mason static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, 25419c00ddcSChris Mason int verify) 25519c00ddcSChris Mason { 2566c41761fSDavid Sterba u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy); 257607d432dSJosef Bacik char *result = NULL; 25819c00ddcSChris Mason unsigned long len; 25919c00ddcSChris Mason unsigned long cur_len; 26019c00ddcSChris Mason unsigned long offset = BTRFS_CSUM_SIZE; 26119c00ddcSChris Mason char *kaddr; 26219c00ddcSChris Mason unsigned long map_start; 26319c00ddcSChris Mason unsigned long map_len; 26419c00ddcSChris Mason int err; 26519c00ddcSChris Mason u32 crc = ~(u32)0; 266607d432dSJosef Bacik unsigned long inline_result; 26719c00ddcSChris Mason 26819c00ddcSChris Mason len = buf->len - offset; 26919c00ddcSChris Mason while (len > 0) { 27019c00ddcSChris Mason err = map_private_extent_buffer(buf, offset, 32, 271a6591715SChris Mason &kaddr, &map_start, &map_len); 272d397712bSChris Mason if (err) 27319c00ddcSChris Mason return 1; 27419c00ddcSChris Mason cur_len = min(len, map_len - (offset - map_start)); 27519c00ddcSChris Mason crc = btrfs_csum_data(root, kaddr + offset - map_start, 27619c00ddcSChris Mason crc, cur_len); 27719c00ddcSChris Mason len -= cur_len; 27819c00ddcSChris Mason offset += cur_len; 27919c00ddcSChris Mason } 280607d432dSJosef Bacik if (csum_size > sizeof(inline_result)) { 281607d432dSJosef Bacik result = kzalloc(csum_size * sizeof(char), GFP_NOFS); 282607d432dSJosef Bacik if (!result) 283607d432dSJosef Bacik return 1; 284607d432dSJosef Bacik } else { 285607d432dSJosef Bacik result = (char *)&inline_result; 286607d432dSJosef Bacik } 287607d432dSJosef Bacik 28819c00ddcSChris Mason btrfs_csum_final(crc, result); 28919c00ddcSChris Mason 29019c00ddcSChris Mason if (verify) { 291607d432dSJosef Bacik if (memcmp_extent_buffer(buf, result, 0, csum_size)) { 292e4204dedSChris Mason u32 val; 293e4204dedSChris Mason u32 found = 0; 294607d432dSJosef Bacik memcpy(&found, result, csum_size); 295e4204dedSChris Mason 296607d432dSJosef Bacik read_extent_buffer(buf, &val, 0, csum_size); 2977a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs: %s checksum verify " 298193f284dSChris Mason "failed on %llu wanted %X found %X " 299193f284dSChris Mason "level %d\n", 30019c00ddcSChris Mason root->fs_info->sb->s_id, 301193f284dSChris Mason (unsigned long long)buf->start, val, found, 302193f284dSChris Mason btrfs_header_level(buf)); 303607d432dSJosef Bacik if (result != (char *)&inline_result) 304607d432dSJosef Bacik kfree(result); 30519c00ddcSChris Mason return 1; 30619c00ddcSChris Mason } 30719c00ddcSChris Mason } else { 308607d432dSJosef Bacik write_extent_buffer(buf, result, 0, csum_size); 30919c00ddcSChris Mason } 310607d432dSJosef Bacik if (result != (char *)&inline_result) 311607d432dSJosef Bacik kfree(result); 31219c00ddcSChris Mason return 0; 31319c00ddcSChris Mason } 31419c00ddcSChris Mason 315d352ac68SChris Mason /* 316d352ac68SChris Mason * we can't consider a given block up to date unless the transid of the 317d352ac68SChris Mason * block matches the transid in the parent node's pointer. This is how we 318d352ac68SChris Mason * detect blocks that either didn't get written at all or got written 319d352ac68SChris Mason * in the wrong place. 320d352ac68SChris Mason */ 3211259ab75SChris Mason static int verify_parent_transid(struct extent_io_tree *io_tree, 322b9fab919SChris Mason struct extent_buffer *eb, u64 parent_transid, 323b9fab919SChris Mason int atomic) 3241259ab75SChris Mason { 3252ac55d41SJosef Bacik struct extent_state *cached_state = NULL; 3261259ab75SChris Mason int ret; 3271259ab75SChris Mason 3281259ab75SChris Mason if (!parent_transid || btrfs_header_generation(eb) == parent_transid) 3291259ab75SChris Mason return 0; 3301259ab75SChris Mason 331b9fab919SChris Mason if (atomic) 332b9fab919SChris Mason return -EAGAIN; 333b9fab919SChris Mason 3342ac55d41SJosef Bacik lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, 335d0082371SJeff Mahoney 0, &cached_state); 3360b32f4bbSJosef Bacik if (extent_buffer_uptodate(eb) && 3371259ab75SChris Mason btrfs_header_generation(eb) == parent_transid) { 3381259ab75SChris Mason ret = 0; 3391259ab75SChris Mason goto out; 3401259ab75SChris Mason } 3417a36ddecSDavid Sterba printk_ratelimited("parent transid verify failed on %llu wanted %llu " 342193f284dSChris Mason "found %llu\n", 3431259ab75SChris Mason (unsigned long long)eb->start, 3441259ab75SChris Mason (unsigned long long)parent_transid, 3451259ab75SChris Mason (unsigned long long)btrfs_header_generation(eb)); 3461259ab75SChris Mason ret = 1; 3470b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 34833958dc6SChris Mason out: 3492ac55d41SJosef Bacik unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, 3502ac55d41SJosef Bacik &cached_state, GFP_NOFS); 3511259ab75SChris Mason return ret; 3521259ab75SChris Mason } 3531259ab75SChris Mason 354d352ac68SChris Mason /* 355d352ac68SChris Mason * helper to read a given tree block, doing retries as required when 356d352ac68SChris Mason * the checksums don't match and we have alternate mirrors to try. 357d352ac68SChris Mason */ 358f188591eSChris Mason static int btree_read_extent_buffer_pages(struct btrfs_root *root, 359f188591eSChris Mason struct extent_buffer *eb, 360ca7a79adSChris Mason u64 start, u64 parent_transid) 361f188591eSChris Mason { 362f188591eSChris Mason struct extent_io_tree *io_tree; 363ea466794SJosef Bacik int failed = 0; 364f188591eSChris Mason int ret; 365f188591eSChris Mason int num_copies = 0; 366f188591eSChris Mason int mirror_num = 0; 367ea466794SJosef Bacik int failed_mirror = 0; 368f188591eSChris Mason 369a826d6dcSJosef Bacik clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 370f188591eSChris Mason io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; 371f188591eSChris Mason while (1) { 372bb82ab88SArne Jansen ret = read_extent_buffer_pages(io_tree, eb, start, 373bb82ab88SArne Jansen WAIT_COMPLETE, 374f188591eSChris Mason btree_get_extent, mirror_num); 375256dd1bbSStefan Behrens if (!ret) { 376256dd1bbSStefan Behrens if (!verify_parent_transid(io_tree, eb, 377b9fab919SChris Mason parent_transid, 0)) 378ea466794SJosef Bacik break; 379256dd1bbSStefan Behrens else 380256dd1bbSStefan Behrens ret = -EIO; 381256dd1bbSStefan Behrens } 382d397712bSChris Mason 383a826d6dcSJosef Bacik /* 384a826d6dcSJosef Bacik * This buffer's crc is fine, but its contents are corrupted, so 385a826d6dcSJosef Bacik * there is no reason to read the other copies, they won't be 386a826d6dcSJosef Bacik * any less wrong. 387a826d6dcSJosef Bacik */ 388a826d6dcSJosef Bacik if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) 389ea466794SJosef Bacik break; 390ea466794SJosef Bacik 3915d964051SStefan Behrens num_copies = btrfs_num_copies(root->fs_info, 392f188591eSChris Mason eb->start, eb->len); 3934235298eSChris Mason if (num_copies == 1) 394ea466794SJosef Bacik break; 3954235298eSChris Mason 3965cf1ab56SJosef Bacik if (!failed_mirror) { 3975cf1ab56SJosef Bacik failed = 1; 3985cf1ab56SJosef Bacik failed_mirror = eb->read_mirror; 3995cf1ab56SJosef Bacik } 4005cf1ab56SJosef Bacik 401f188591eSChris Mason mirror_num++; 402ea466794SJosef Bacik if (mirror_num == failed_mirror) 403ea466794SJosef Bacik mirror_num++; 404ea466794SJosef Bacik 4054235298eSChris Mason if (mirror_num > num_copies) 406ea466794SJosef Bacik break; 407f188591eSChris Mason } 408ea466794SJosef Bacik 409c0901581SStefan Behrens if (failed && !ret && failed_mirror) 410ea466794SJosef Bacik repair_eb_io_failure(root, eb, failed_mirror); 411ea466794SJosef Bacik 412ea466794SJosef Bacik return ret; 413f188591eSChris Mason } 41419c00ddcSChris Mason 415d352ac68SChris Mason /* 416d397712bSChris Mason * checksum a dirty tree block before IO. This has extra checks to make sure 417d397712bSChris Mason * we only fill in the checksum field in the first page of a multi-page block 418d352ac68SChris Mason */ 419d397712bSChris Mason 420b2950863SChristoph Hellwig static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) 42119c00ddcSChris Mason { 422d1310b2eSChris Mason struct extent_io_tree *tree; 42335ebb934SChris Mason u64 start = (u64)page->index << PAGE_CACHE_SHIFT; 42419c00ddcSChris Mason u64 found_start; 42519c00ddcSChris Mason struct extent_buffer *eb; 426f188591eSChris Mason 427d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 42819c00ddcSChris Mason 4294f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 4304f2de97aSJosef Bacik if (page != eb->pages[0]) 4314f2de97aSJosef Bacik return 0; 43219c00ddcSChris Mason found_start = btrfs_header_bytenr(eb); 43319c00ddcSChris Mason if (found_start != start) { 43455c69072SChris Mason WARN_ON(1); 4354f2de97aSJosef Bacik return 0; 43655c69072SChris Mason } 43755c69072SChris Mason if (!PageUptodate(page)) { 43855c69072SChris Mason WARN_ON(1); 4394f2de97aSJosef Bacik return 0; 44019c00ddcSChris Mason } 44119c00ddcSChris Mason csum_tree_block(root, eb, 0); 44219c00ddcSChris Mason return 0; 44319c00ddcSChris Mason } 44419c00ddcSChris Mason 4452b82032cSYan Zheng static int check_tree_block_fsid(struct btrfs_root *root, 4462b82032cSYan Zheng struct extent_buffer *eb) 4472b82032cSYan Zheng { 4482b82032cSYan Zheng struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; 4492b82032cSYan Zheng u8 fsid[BTRFS_UUID_SIZE]; 4502b82032cSYan Zheng int ret = 1; 4512b82032cSYan Zheng 4522b82032cSYan Zheng read_extent_buffer(eb, fsid, (unsigned long)btrfs_header_fsid(eb), 4532b82032cSYan Zheng BTRFS_FSID_SIZE); 4542b82032cSYan Zheng while (fs_devices) { 4552b82032cSYan Zheng if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { 4562b82032cSYan Zheng ret = 0; 4572b82032cSYan Zheng break; 4582b82032cSYan Zheng } 4592b82032cSYan Zheng fs_devices = fs_devices->seed; 4602b82032cSYan Zheng } 4612b82032cSYan Zheng return ret; 4622b82032cSYan Zheng } 4632b82032cSYan Zheng 464a826d6dcSJosef Bacik #define CORRUPT(reason, eb, root, slot) \ 465a826d6dcSJosef Bacik printk(KERN_CRIT "btrfs: corrupt leaf, %s: block=%llu," \ 466a826d6dcSJosef Bacik "root=%llu, slot=%d\n", reason, \ 467a826d6dcSJosef Bacik (unsigned long long)btrfs_header_bytenr(eb), \ 468a826d6dcSJosef Bacik (unsigned long long)root->objectid, slot) 469a826d6dcSJosef Bacik 470a826d6dcSJosef Bacik static noinline int check_leaf(struct btrfs_root *root, 471a826d6dcSJosef Bacik struct extent_buffer *leaf) 472a826d6dcSJosef Bacik { 473a826d6dcSJosef Bacik struct btrfs_key key; 474a826d6dcSJosef Bacik struct btrfs_key leaf_key; 475a826d6dcSJosef Bacik u32 nritems = btrfs_header_nritems(leaf); 476a826d6dcSJosef Bacik int slot; 477a826d6dcSJosef Bacik 478a826d6dcSJosef Bacik if (nritems == 0) 479a826d6dcSJosef Bacik return 0; 480a826d6dcSJosef Bacik 481a826d6dcSJosef Bacik /* Check the 0 item */ 482a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != 483a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 484a826d6dcSJosef Bacik CORRUPT("invalid item offset size pair", leaf, root, 0); 485a826d6dcSJosef Bacik return -EIO; 486a826d6dcSJosef Bacik } 487a826d6dcSJosef Bacik 488a826d6dcSJosef Bacik /* 489a826d6dcSJosef Bacik * Check to make sure each items keys are in the correct order and their 490a826d6dcSJosef Bacik * offsets make sense. We only have to loop through nritems-1 because 491a826d6dcSJosef Bacik * we check the current slot against the next slot, which verifies the 492a826d6dcSJosef Bacik * next slot's offset+size makes sense and that the current's slot 493a826d6dcSJosef Bacik * offset is correct. 494a826d6dcSJosef Bacik */ 495a826d6dcSJosef Bacik for (slot = 0; slot < nritems - 1; slot++) { 496a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &leaf_key, slot); 497a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &key, slot + 1); 498a826d6dcSJosef Bacik 499a826d6dcSJosef Bacik /* Make sure the keys are in the right order */ 500a826d6dcSJosef Bacik if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { 501a826d6dcSJosef Bacik CORRUPT("bad key order", leaf, root, slot); 502a826d6dcSJosef Bacik return -EIO; 503a826d6dcSJosef Bacik } 504a826d6dcSJosef Bacik 505a826d6dcSJosef Bacik /* 506a826d6dcSJosef Bacik * Make sure the offset and ends are right, remember that the 507a826d6dcSJosef Bacik * item data starts at the end of the leaf and grows towards the 508a826d6dcSJosef Bacik * front. 509a826d6dcSJosef Bacik */ 510a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, slot) != 511a826d6dcSJosef Bacik btrfs_item_end_nr(leaf, slot + 1)) { 512a826d6dcSJosef Bacik CORRUPT("slot offset bad", leaf, root, slot); 513a826d6dcSJosef Bacik return -EIO; 514a826d6dcSJosef Bacik } 515a826d6dcSJosef Bacik 516a826d6dcSJosef Bacik /* 517a826d6dcSJosef Bacik * Check to make sure that we don't point outside of the leaf, 518a826d6dcSJosef Bacik * just incase all the items are consistent to eachother, but 519a826d6dcSJosef Bacik * all point outside of the leaf. 520a826d6dcSJosef Bacik */ 521a826d6dcSJosef Bacik if (btrfs_item_end_nr(leaf, slot) > 522a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 523a826d6dcSJosef Bacik CORRUPT("slot end outside of leaf", leaf, root, slot); 524a826d6dcSJosef Bacik return -EIO; 525a826d6dcSJosef Bacik } 526a826d6dcSJosef Bacik } 527a826d6dcSJosef Bacik 528a826d6dcSJosef Bacik return 0; 529a826d6dcSJosef Bacik } 530a826d6dcSJosef Bacik 531727011e0SChris Mason struct extent_buffer *find_eb_for_page(struct extent_io_tree *tree, 532727011e0SChris Mason struct page *page, int max_walk) 533727011e0SChris Mason { 534727011e0SChris Mason struct extent_buffer *eb; 535727011e0SChris Mason u64 start = page_offset(page); 536727011e0SChris Mason u64 target = start; 537727011e0SChris Mason u64 min_start; 538727011e0SChris Mason 539727011e0SChris Mason if (start < max_walk) 540727011e0SChris Mason min_start = 0; 541727011e0SChris Mason else 542727011e0SChris Mason min_start = start - max_walk; 543727011e0SChris Mason 544727011e0SChris Mason while (start >= min_start) { 545727011e0SChris Mason eb = find_extent_buffer(tree, start, 0); 546727011e0SChris Mason if (eb) { 547727011e0SChris Mason /* 548727011e0SChris Mason * we found an extent buffer and it contains our page 549727011e0SChris Mason * horray! 550727011e0SChris Mason */ 551727011e0SChris Mason if (eb->start <= target && 552727011e0SChris Mason eb->start + eb->len > target) 553727011e0SChris Mason return eb; 554727011e0SChris Mason 555727011e0SChris Mason /* we found an extent buffer that wasn't for us */ 556727011e0SChris Mason free_extent_buffer(eb); 557727011e0SChris Mason return NULL; 558727011e0SChris Mason } 559727011e0SChris Mason if (start == 0) 560727011e0SChris Mason break; 561727011e0SChris Mason start -= PAGE_CACHE_SIZE; 562727011e0SChris Mason } 563727011e0SChris Mason return NULL; 564727011e0SChris Mason } 565727011e0SChris Mason 566b2950863SChristoph Hellwig static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end, 5675cf1ab56SJosef Bacik struct extent_state *state, int mirror) 568ce9adaa5SChris Mason { 569ce9adaa5SChris Mason struct extent_io_tree *tree; 570ce9adaa5SChris Mason u64 found_start; 571ce9adaa5SChris Mason int found_level; 572ce9adaa5SChris Mason struct extent_buffer *eb; 573ce9adaa5SChris Mason struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 574f188591eSChris Mason int ret = 0; 575727011e0SChris Mason int reads_done; 576ce9adaa5SChris Mason 577ce9adaa5SChris Mason if (!page->private) 578ce9adaa5SChris Mason goto out; 579d397712bSChris Mason 580727011e0SChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 5814f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 582d397712bSChris Mason 5830b32f4bbSJosef Bacik /* the pending IO might have been the only thing that kept this buffer 5840b32f4bbSJosef Bacik * in memory. Make sure we have a ref for all this other checks 5850b32f4bbSJosef Bacik */ 5860b32f4bbSJosef Bacik extent_buffer_get(eb); 5870b32f4bbSJosef Bacik 5880b32f4bbSJosef Bacik reads_done = atomic_dec_and_test(&eb->io_pages); 589727011e0SChris Mason if (!reads_done) 590727011e0SChris Mason goto err; 591f188591eSChris Mason 5925cf1ab56SJosef Bacik eb->read_mirror = mirror; 593ea466794SJosef Bacik if (test_bit(EXTENT_BUFFER_IOERR, &eb->bflags)) { 594ea466794SJosef Bacik ret = -EIO; 595ea466794SJosef Bacik goto err; 596ea466794SJosef Bacik } 597ea466794SJosef Bacik 598ce9adaa5SChris Mason found_start = btrfs_header_bytenr(eb); 599727011e0SChris Mason if (found_start != eb->start) { 6007a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs bad tree block start " 601193f284dSChris Mason "%llu %llu\n", 602a1b32a59SChris Mason (unsigned long long)found_start, 603a1b32a59SChris Mason (unsigned long long)eb->start); 604f188591eSChris Mason ret = -EIO; 605ce9adaa5SChris Mason goto err; 606ce9adaa5SChris Mason } 6072b82032cSYan Zheng if (check_tree_block_fsid(root, eb)) { 6087a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs bad fsid on block %llu\n", 609d397712bSChris Mason (unsigned long long)eb->start); 6101259ab75SChris Mason ret = -EIO; 6111259ab75SChris Mason goto err; 6121259ab75SChris Mason } 613ce9adaa5SChris Mason found_level = btrfs_header_level(eb); 614ce9adaa5SChris Mason 61585d4e461SChris Mason btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), 61685d4e461SChris Mason eb, found_level); 6174008c04aSChris Mason 618ce9adaa5SChris Mason ret = csum_tree_block(root, eb, 1); 619a826d6dcSJosef Bacik if (ret) { 620f188591eSChris Mason ret = -EIO; 621a826d6dcSJosef Bacik goto err; 622a826d6dcSJosef Bacik } 623a826d6dcSJosef Bacik 624a826d6dcSJosef Bacik /* 625a826d6dcSJosef Bacik * If this is a leaf block and it is corrupt, set the corrupt bit so 626a826d6dcSJosef Bacik * that we don't try and read the other copies of this block, just 627a826d6dcSJosef Bacik * return -EIO. 628a826d6dcSJosef Bacik */ 629a826d6dcSJosef Bacik if (found_level == 0 && check_leaf(root, eb)) { 630a826d6dcSJosef Bacik set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 631a826d6dcSJosef Bacik ret = -EIO; 632a826d6dcSJosef Bacik } 633ce9adaa5SChris Mason 6340b32f4bbSJosef Bacik if (!ret) 6350b32f4bbSJosef Bacik set_extent_buffer_uptodate(eb); 636ce9adaa5SChris Mason err: 6374bb31e92SArne Jansen if (test_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) { 6384bb31e92SArne Jansen clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags); 6394bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, ret); 6404bb31e92SArne Jansen } 6414bb31e92SArne Jansen 6420b32f4bbSJosef Bacik if (ret) 6430b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 6440b32f4bbSJosef Bacik free_extent_buffer(eb); 645ce9adaa5SChris Mason out: 646f188591eSChris Mason return ret; 647ce9adaa5SChris Mason } 648ce9adaa5SChris Mason 649ea466794SJosef Bacik static int btree_io_failed_hook(struct page *page, int failed_mirror) 6504bb31e92SArne Jansen { 6514bb31e92SArne Jansen struct extent_buffer *eb; 6524bb31e92SArne Jansen struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 6534bb31e92SArne Jansen 6544f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 655ea466794SJosef Bacik set_bit(EXTENT_BUFFER_IOERR, &eb->bflags); 6565cf1ab56SJosef Bacik eb->read_mirror = failed_mirror; 657ea466794SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 6584bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, -EIO); 6594bb31e92SArne Jansen return -EIO; /* we fixed nothing */ 6604bb31e92SArne Jansen } 6614bb31e92SArne Jansen 662ce9adaa5SChris Mason static void end_workqueue_bio(struct bio *bio, int err) 663ce9adaa5SChris Mason { 664ce9adaa5SChris Mason struct end_io_wq *end_io_wq = bio->bi_private; 665ce9adaa5SChris Mason struct btrfs_fs_info *fs_info; 666ce9adaa5SChris Mason 667ce9adaa5SChris Mason fs_info = end_io_wq->info; 668ce9adaa5SChris Mason end_io_wq->error = err; 6698b712842SChris Mason end_io_wq->work.func = end_workqueue_fn; 6708b712842SChris Mason end_io_wq->work.flags = 0; 671d20f7043SChris Mason 6727b6d91daSChristoph Hellwig if (bio->bi_rw & REQ_WRITE) { 6730cb59c99SJosef Bacik if (end_io_wq->metadata == 1) 674cad321adSChris Mason btrfs_queue_worker(&fs_info->endio_meta_write_workers, 675cad321adSChris Mason &end_io_wq->work); 6760cb59c99SJosef Bacik else if (end_io_wq->metadata == 2) 6770cb59c99SJosef Bacik btrfs_queue_worker(&fs_info->endio_freespace_worker, 6780cb59c99SJosef Bacik &end_io_wq->work); 679cad321adSChris Mason else 680e6dcd2dcSChris Mason btrfs_queue_worker(&fs_info->endio_write_workers, 681e6dcd2dcSChris Mason &end_io_wq->work); 682d20f7043SChris Mason } else { 683d20f7043SChris Mason if (end_io_wq->metadata) 684d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_meta_workers, 685d20f7043SChris Mason &end_io_wq->work); 686e6dcd2dcSChris Mason else 687d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_workers, 688d20f7043SChris Mason &end_io_wq->work); 689d20f7043SChris Mason } 690ce9adaa5SChris Mason } 691ce9adaa5SChris Mason 6920cb59c99SJosef Bacik /* 6930cb59c99SJosef Bacik * For the metadata arg you want 6940cb59c99SJosef Bacik * 6950cb59c99SJosef Bacik * 0 - if data 6960cb59c99SJosef Bacik * 1 - if normal metadta 6970cb59c99SJosef Bacik * 2 - if writing to the free space cache area 6980cb59c99SJosef Bacik */ 69922c59948SChris Mason int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, 70022c59948SChris Mason int metadata) 7010b86a832SChris Mason { 702ce9adaa5SChris Mason struct end_io_wq *end_io_wq; 703ce9adaa5SChris Mason end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); 704ce9adaa5SChris Mason if (!end_io_wq) 705ce9adaa5SChris Mason return -ENOMEM; 706ce9adaa5SChris Mason 707ce9adaa5SChris Mason end_io_wq->private = bio->bi_private; 708ce9adaa5SChris Mason end_io_wq->end_io = bio->bi_end_io; 70922c59948SChris Mason end_io_wq->info = info; 710ce9adaa5SChris Mason end_io_wq->error = 0; 711ce9adaa5SChris Mason end_io_wq->bio = bio; 71222c59948SChris Mason end_io_wq->metadata = metadata; 713ce9adaa5SChris Mason 714ce9adaa5SChris Mason bio->bi_private = end_io_wq; 715ce9adaa5SChris Mason bio->bi_end_io = end_workqueue_bio; 71622c59948SChris Mason return 0; 71722c59948SChris Mason } 71822c59948SChris Mason 719b64a2851SChris Mason unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) 7204854ddd0SChris Mason { 7214854ddd0SChris Mason unsigned long limit = min_t(unsigned long, 7224854ddd0SChris Mason info->workers.max_workers, 7234854ddd0SChris Mason info->fs_devices->open_devices); 7244854ddd0SChris Mason return 256 * limit; 7254854ddd0SChris Mason } 7264854ddd0SChris Mason 7274a69a410SChris Mason static void run_one_async_start(struct btrfs_work *work) 7284a69a410SChris Mason { 7294a69a410SChris Mason struct async_submit_bio *async; 73079787eaaSJeff Mahoney int ret; 7314a69a410SChris Mason 7324a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 73379787eaaSJeff Mahoney ret = async->submit_bio_start(async->inode, async->rw, async->bio, 734eaf25d93SChris Mason async->mirror_num, async->bio_flags, 735eaf25d93SChris Mason async->bio_offset); 73679787eaaSJeff Mahoney if (ret) 73779787eaaSJeff Mahoney async->error = ret; 7384a69a410SChris Mason } 7394a69a410SChris Mason 7404a69a410SChris Mason static void run_one_async_done(struct btrfs_work *work) 7418b712842SChris Mason { 7428b712842SChris Mason struct btrfs_fs_info *fs_info; 7438b712842SChris Mason struct async_submit_bio *async; 7444854ddd0SChris Mason int limit; 7458b712842SChris Mason 7468b712842SChris Mason async = container_of(work, struct async_submit_bio, work); 7478b712842SChris Mason fs_info = BTRFS_I(async->inode)->root->fs_info; 7484854ddd0SChris Mason 749b64a2851SChris Mason limit = btrfs_async_submit_limit(fs_info); 7504854ddd0SChris Mason limit = limit * 2 / 3; 7514854ddd0SChris Mason 75266657b31SJosef Bacik if (atomic_dec_return(&fs_info->nr_async_submits) < limit && 753b64a2851SChris Mason waitqueue_active(&fs_info->async_submit_wait)) 7544854ddd0SChris Mason wake_up(&fs_info->async_submit_wait); 7554854ddd0SChris Mason 75679787eaaSJeff Mahoney /* If an error occured we just want to clean up the bio and move on */ 75779787eaaSJeff Mahoney if (async->error) { 75879787eaaSJeff Mahoney bio_endio(async->bio, async->error); 75979787eaaSJeff Mahoney return; 76079787eaaSJeff Mahoney } 76179787eaaSJeff Mahoney 7624a69a410SChris Mason async->submit_bio_done(async->inode, async->rw, async->bio, 763eaf25d93SChris Mason async->mirror_num, async->bio_flags, 764eaf25d93SChris Mason async->bio_offset); 7654a69a410SChris Mason } 7664a69a410SChris Mason 7674a69a410SChris Mason static void run_one_async_free(struct btrfs_work *work) 7684a69a410SChris Mason { 7694a69a410SChris Mason struct async_submit_bio *async; 7704a69a410SChris Mason 7714a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 7728b712842SChris Mason kfree(async); 7738b712842SChris Mason } 7748b712842SChris Mason 77544b8bd7eSChris Mason int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, 77644b8bd7eSChris Mason int rw, struct bio *bio, int mirror_num, 777c8b97818SChris Mason unsigned long bio_flags, 778eaf25d93SChris Mason u64 bio_offset, 7794a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start, 7804a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done) 78144b8bd7eSChris Mason { 78244b8bd7eSChris Mason struct async_submit_bio *async; 78344b8bd7eSChris Mason 78444b8bd7eSChris Mason async = kmalloc(sizeof(*async), GFP_NOFS); 78544b8bd7eSChris Mason if (!async) 78644b8bd7eSChris Mason return -ENOMEM; 78744b8bd7eSChris Mason 78844b8bd7eSChris Mason async->inode = inode; 78944b8bd7eSChris Mason async->rw = rw; 79044b8bd7eSChris Mason async->bio = bio; 79144b8bd7eSChris Mason async->mirror_num = mirror_num; 7924a69a410SChris Mason async->submit_bio_start = submit_bio_start; 7934a69a410SChris Mason async->submit_bio_done = submit_bio_done; 7944a69a410SChris Mason 7954a69a410SChris Mason async->work.func = run_one_async_start; 7964a69a410SChris Mason async->work.ordered_func = run_one_async_done; 7974a69a410SChris Mason async->work.ordered_free = run_one_async_free; 7984a69a410SChris Mason 7998b712842SChris Mason async->work.flags = 0; 800c8b97818SChris Mason async->bio_flags = bio_flags; 801eaf25d93SChris Mason async->bio_offset = bio_offset; 8028c8bee1dSChris Mason 80379787eaaSJeff Mahoney async->error = 0; 80479787eaaSJeff Mahoney 805cb03c743SChris Mason atomic_inc(&fs_info->nr_async_submits); 806d313d7a3SChris Mason 8077b6d91daSChristoph Hellwig if (rw & REQ_SYNC) 808d313d7a3SChris Mason btrfs_set_work_high_prio(&async->work); 809d313d7a3SChris Mason 8108b712842SChris Mason btrfs_queue_worker(&fs_info->workers, &async->work); 8119473f16cSChris Mason 812771ed689SChris Mason while (atomic_read(&fs_info->async_submit_draining) && 813771ed689SChris Mason atomic_read(&fs_info->nr_async_submits)) { 814771ed689SChris Mason wait_event(fs_info->async_submit_wait, 815771ed689SChris Mason (atomic_read(&fs_info->nr_async_submits) == 0)); 816771ed689SChris Mason } 817771ed689SChris Mason 81844b8bd7eSChris Mason return 0; 81944b8bd7eSChris Mason } 82044b8bd7eSChris Mason 821ce3ed71aSChris Mason static int btree_csum_one_bio(struct bio *bio) 822ce3ed71aSChris Mason { 823ce3ed71aSChris Mason struct bio_vec *bvec = bio->bi_io_vec; 824ce3ed71aSChris Mason int bio_index = 0; 825ce3ed71aSChris Mason struct btrfs_root *root; 82679787eaaSJeff Mahoney int ret = 0; 827ce3ed71aSChris Mason 828ce3ed71aSChris Mason WARN_ON(bio->bi_vcnt <= 0); 829ce3ed71aSChris Mason while (bio_index < bio->bi_vcnt) { 830ce3ed71aSChris Mason root = BTRFS_I(bvec->bv_page->mapping->host)->root; 83179787eaaSJeff Mahoney ret = csum_dirty_buffer(root, bvec->bv_page); 83279787eaaSJeff Mahoney if (ret) 83379787eaaSJeff Mahoney break; 834ce3ed71aSChris Mason bio_index++; 835ce3ed71aSChris Mason bvec++; 836ce3ed71aSChris Mason } 83779787eaaSJeff Mahoney return ret; 838ce3ed71aSChris Mason } 839ce3ed71aSChris Mason 8404a69a410SChris Mason static int __btree_submit_bio_start(struct inode *inode, int rw, 8414a69a410SChris Mason struct bio *bio, int mirror_num, 842eaf25d93SChris Mason unsigned long bio_flags, 843eaf25d93SChris Mason u64 bio_offset) 84422c59948SChris Mason { 8458b712842SChris Mason /* 8468b712842SChris Mason * when we're called for a write, we're already in the async 8475443be45SChris Mason * submission context. Just jump into btrfs_map_bio 8488b712842SChris Mason */ 84979787eaaSJeff Mahoney return btree_csum_one_bio(bio); 85022c59948SChris Mason } 85122c59948SChris Mason 8524a69a410SChris Mason static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, 853eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 854eaf25d93SChris Mason u64 bio_offset) 8554a69a410SChris Mason { 85661891923SStefan Behrens int ret; 85761891923SStefan Behrens 8588b712842SChris Mason /* 8594a69a410SChris Mason * when we're called for a write, we're already in the async 8604a69a410SChris Mason * submission context. Just jump into btrfs_map_bio 8618b712842SChris Mason */ 86261891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); 86361891923SStefan Behrens if (ret) 86461891923SStefan Behrens bio_endio(bio, ret); 86561891923SStefan Behrens return ret; 8660b86a832SChris Mason } 8670b86a832SChris Mason 868de0022b9SJosef Bacik static int check_async_write(struct inode *inode, unsigned long bio_flags) 869de0022b9SJosef Bacik { 870de0022b9SJosef Bacik if (bio_flags & EXTENT_BIO_TREE_LOG) 871de0022b9SJosef Bacik return 0; 872de0022b9SJosef Bacik #ifdef CONFIG_X86 873de0022b9SJosef Bacik if (cpu_has_xmm4_2) 874de0022b9SJosef Bacik return 0; 875de0022b9SJosef Bacik #endif 876de0022b9SJosef Bacik return 1; 877de0022b9SJosef Bacik } 878de0022b9SJosef Bacik 87944b8bd7eSChris Mason static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, 880eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 881eaf25d93SChris Mason u64 bio_offset) 88244b8bd7eSChris Mason { 883de0022b9SJosef Bacik int async = check_async_write(inode, bio_flags); 8844a69a410SChris Mason int ret; 885cad321adSChris Mason 8867b6d91daSChristoph Hellwig if (!(rw & REQ_WRITE)) { 887cad321adSChris Mason /* 888cad321adSChris Mason * called for a read, do the setup so that checksum validation 889cad321adSChris Mason * can happen in the async kernel threads 890cad321adSChris Mason */ 891f3f266abSChris Mason ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, 892f3f266abSChris Mason bio, 1); 8931d4284bdSChris Mason if (ret) 89461891923SStefan Behrens goto out_w_error; 89561891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 8966f3577bdSChris Mason mirror_num, 0); 897de0022b9SJosef Bacik } else if (!async) { 898de0022b9SJosef Bacik ret = btree_csum_one_bio(bio); 899de0022b9SJosef Bacik if (ret) 90061891923SStefan Behrens goto out_w_error; 90161891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 902de0022b9SJosef Bacik mirror_num, 0); 90361891923SStefan Behrens } else { 904cad321adSChris Mason /* 90561891923SStefan Behrens * kthread helpers are used to submit writes so that 90661891923SStefan Behrens * checksumming can happen in parallel across all CPUs 907cad321adSChris Mason */ 90861891923SStefan Behrens ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, 909c8b97818SChris Mason inode, rw, bio, mirror_num, 0, 910eaf25d93SChris Mason bio_offset, 9114a69a410SChris Mason __btree_submit_bio_start, 9124a69a410SChris Mason __btree_submit_bio_done); 91344b8bd7eSChris Mason } 91444b8bd7eSChris Mason 91561891923SStefan Behrens if (ret) { 91661891923SStefan Behrens out_w_error: 91761891923SStefan Behrens bio_endio(bio, ret); 91861891923SStefan Behrens } 91961891923SStefan Behrens return ret; 92061891923SStefan Behrens } 92161891923SStefan Behrens 9223dd1462eSJan Beulich #ifdef CONFIG_MIGRATION 923784b4e29SChris Mason static int btree_migratepage(struct address_space *mapping, 924a6bc32b8SMel Gorman struct page *newpage, struct page *page, 925a6bc32b8SMel Gorman enum migrate_mode mode) 926784b4e29SChris Mason { 927784b4e29SChris Mason /* 928784b4e29SChris Mason * we can't safely write a btree page from here, 929784b4e29SChris Mason * we haven't done the locking hook 930784b4e29SChris Mason */ 931784b4e29SChris Mason if (PageDirty(page)) 932784b4e29SChris Mason return -EAGAIN; 933784b4e29SChris Mason /* 934784b4e29SChris Mason * Buffers may be managed in a filesystem specific way. 935784b4e29SChris Mason * We must have no buffers or drop them. 936784b4e29SChris Mason */ 937784b4e29SChris Mason if (page_has_private(page) && 938784b4e29SChris Mason !try_to_release_page(page, GFP_KERNEL)) 939784b4e29SChris Mason return -EAGAIN; 940a6bc32b8SMel Gorman return migrate_page(mapping, newpage, page, mode); 941784b4e29SChris Mason } 9423dd1462eSJan Beulich #endif 943784b4e29SChris Mason 9440da5468fSChris Mason 9450da5468fSChris Mason static int btree_writepages(struct address_space *mapping, 9460da5468fSChris Mason struct writeback_control *wbc) 9470da5468fSChris Mason { 948d1310b2eSChris Mason struct extent_io_tree *tree; 949d1310b2eSChris Mason tree = &BTRFS_I(mapping->host)->io_tree; 950d8d5f3e1SChris Mason if (wbc->sync_mode == WB_SYNC_NONE) { 951b9473439SChris Mason struct btrfs_root *root = BTRFS_I(mapping->host)->root; 952793955bcSChris Mason u64 num_dirty; 95324ab9cd8SChris Mason unsigned long thresh = 32 * 1024 * 1024; 954448d640bSChris Mason 955448d640bSChris Mason if (wbc->for_kupdate) 956448d640bSChris Mason return 0; 957448d640bSChris Mason 958b9473439SChris Mason /* this is a bit racy, but that's ok */ 959b9473439SChris Mason num_dirty = root->fs_info->dirty_metadata_bytes; 960d397712bSChris Mason if (num_dirty < thresh) 961793955bcSChris Mason return 0; 962793955bcSChris Mason } 9630b32f4bbSJosef Bacik return btree_write_cache_pages(mapping, wbc); 9640da5468fSChris Mason } 9650da5468fSChris Mason 966b2950863SChristoph Hellwig static int btree_readpage(struct file *file, struct page *page) 9675f39d397SChris Mason { 968d1310b2eSChris Mason struct extent_io_tree *tree; 969d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 9708ddc7d9cSJan Schmidt return extent_read_full_page(tree, page, btree_get_extent, 0); 9715f39d397SChris Mason } 9725f39d397SChris Mason 97370dec807SChris Mason static int btree_releasepage(struct page *page, gfp_t gfp_flags) 9745f39d397SChris Mason { 97598509cfcSChris Mason if (PageWriteback(page) || PageDirty(page)) 97698509cfcSChris Mason return 0; 9770c4e538bSDavid Sterba /* 9780c4e538bSDavid Sterba * We need to mask out eg. __GFP_HIGHMEM and __GFP_DMA32 as we're doing 9790c4e538bSDavid Sterba * slab allocation from alloc_extent_state down the callchain where 9800c4e538bSDavid Sterba * it'd hit a BUG_ON as those flags are not allowed. 9810c4e538bSDavid Sterba */ 9820c4e538bSDavid Sterba gfp_flags &= ~GFP_SLAB_BUG_MASK; 9830c4e538bSDavid Sterba 9843083ee2eSJosef Bacik return try_release_extent_buffer(page, gfp_flags); 985d98237b3SChris Mason } 986d98237b3SChris Mason 9875f39d397SChris Mason static void btree_invalidatepage(struct page *page, unsigned long offset) 988d98237b3SChris Mason { 989d1310b2eSChris Mason struct extent_io_tree *tree; 990d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 9915f39d397SChris Mason extent_invalidatepage(tree, page, offset); 9925f39d397SChris Mason btree_releasepage(page, GFP_NOFS); 9939ad6b7bcSChris Mason if (PagePrivate(page)) { 994d397712bSChris Mason printk(KERN_WARNING "btrfs warning page private not zero " 995d397712bSChris Mason "on page %llu\n", (unsigned long long)page_offset(page)); 9969ad6b7bcSChris Mason ClearPagePrivate(page); 9979ad6b7bcSChris Mason set_page_private(page, 0); 9989ad6b7bcSChris Mason page_cache_release(page); 9999ad6b7bcSChris Mason } 1000d98237b3SChris Mason } 1001d98237b3SChris Mason 10020b32f4bbSJosef Bacik static int btree_set_page_dirty(struct page *page) 10030b32f4bbSJosef Bacik { 1004bb146eb2SJosef Bacik #ifdef DEBUG 10050b32f4bbSJosef Bacik struct extent_buffer *eb; 10060b32f4bbSJosef Bacik 10070b32f4bbSJosef Bacik BUG_ON(!PagePrivate(page)); 10080b32f4bbSJosef Bacik eb = (struct extent_buffer *)page->private; 10090b32f4bbSJosef Bacik BUG_ON(!eb); 10100b32f4bbSJosef Bacik BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); 10110b32f4bbSJosef Bacik BUG_ON(!atomic_read(&eb->refs)); 10120b32f4bbSJosef Bacik btrfs_assert_tree_locked(eb); 1013bb146eb2SJosef Bacik #endif 10140b32f4bbSJosef Bacik return __set_page_dirty_nobuffers(page); 10150b32f4bbSJosef Bacik } 10160b32f4bbSJosef Bacik 10177f09410bSAlexey Dobriyan static const struct address_space_operations btree_aops = { 1018d98237b3SChris Mason .readpage = btree_readpage, 10190da5468fSChris Mason .writepages = btree_writepages, 10205f39d397SChris Mason .releasepage = btree_releasepage, 10215f39d397SChris Mason .invalidatepage = btree_invalidatepage, 10225a92bc88SChris Mason #ifdef CONFIG_MIGRATION 1023784b4e29SChris Mason .migratepage = btree_migratepage, 10245a92bc88SChris Mason #endif 10250b32f4bbSJosef Bacik .set_page_dirty = btree_set_page_dirty, 1026d98237b3SChris Mason }; 1027123abc88SChris Mason 1028ca7a79adSChris Mason int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, 1029ca7a79adSChris Mason u64 parent_transid) 1030090d1875SChris Mason { 10315f39d397SChris Mason struct extent_buffer *buf = NULL; 10325f39d397SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 1033de428b63SChris Mason int ret = 0; 1034090d1875SChris Mason 1035db94535dSChris Mason buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 10365f39d397SChris Mason if (!buf) 1037090d1875SChris Mason return 0; 1038d1310b2eSChris Mason read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, 1039bb82ab88SArne Jansen buf, 0, WAIT_NONE, btree_get_extent, 0); 10405f39d397SChris Mason free_extent_buffer(buf); 1041de428b63SChris Mason return ret; 1042090d1875SChris Mason } 1043090d1875SChris Mason 1044ab0fff03SArne Jansen int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, 1045ab0fff03SArne Jansen int mirror_num, struct extent_buffer **eb) 1046ab0fff03SArne Jansen { 1047ab0fff03SArne Jansen struct extent_buffer *buf = NULL; 1048ab0fff03SArne Jansen struct inode *btree_inode = root->fs_info->btree_inode; 1049ab0fff03SArne Jansen struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; 1050ab0fff03SArne Jansen int ret; 1051ab0fff03SArne Jansen 1052ab0fff03SArne Jansen buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 1053ab0fff03SArne Jansen if (!buf) 1054ab0fff03SArne Jansen return 0; 1055ab0fff03SArne Jansen 1056ab0fff03SArne Jansen set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); 1057ab0fff03SArne Jansen 1058ab0fff03SArne Jansen ret = read_extent_buffer_pages(io_tree, buf, 0, WAIT_PAGE_LOCK, 1059ab0fff03SArne Jansen btree_get_extent, mirror_num); 1060ab0fff03SArne Jansen if (ret) { 1061ab0fff03SArne Jansen free_extent_buffer(buf); 1062ab0fff03SArne Jansen return ret; 1063ab0fff03SArne Jansen } 1064ab0fff03SArne Jansen 1065ab0fff03SArne Jansen if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { 1066ab0fff03SArne Jansen free_extent_buffer(buf); 1067ab0fff03SArne Jansen return -EIO; 10680b32f4bbSJosef Bacik } else if (extent_buffer_uptodate(buf)) { 1069ab0fff03SArne Jansen *eb = buf; 1070ab0fff03SArne Jansen } else { 1071ab0fff03SArne Jansen free_extent_buffer(buf); 1072ab0fff03SArne Jansen } 1073ab0fff03SArne Jansen return 0; 1074ab0fff03SArne Jansen } 1075ab0fff03SArne Jansen 10760999df54SChris Mason struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, 10770999df54SChris Mason u64 bytenr, u32 blocksize) 10780999df54SChris Mason { 10790999df54SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 10800999df54SChris Mason struct extent_buffer *eb; 10810999df54SChris Mason eb = find_extent_buffer(&BTRFS_I(btree_inode)->io_tree, 1082f09d1f60SDavid Sterba bytenr, blocksize); 10830999df54SChris Mason return eb; 10840999df54SChris Mason } 10850999df54SChris Mason 10860999df54SChris Mason struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, 10870999df54SChris Mason u64 bytenr, u32 blocksize) 10880999df54SChris Mason { 10890999df54SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 10900999df54SChris Mason struct extent_buffer *eb; 10910999df54SChris Mason 10920999df54SChris Mason eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree, 1093727011e0SChris Mason bytenr, blocksize); 10940999df54SChris Mason return eb; 10950999df54SChris Mason } 10960999df54SChris Mason 10970999df54SChris Mason 1098e02119d5SChris Mason int btrfs_write_tree_block(struct extent_buffer *buf) 1099e02119d5SChris Mason { 1100727011e0SChris Mason return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, 11018aa38c31SChristoph Hellwig buf->start + buf->len - 1); 1102e02119d5SChris Mason } 1103e02119d5SChris Mason 1104e02119d5SChris Mason int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) 1105e02119d5SChris Mason { 1106727011e0SChris Mason return filemap_fdatawait_range(buf->pages[0]->mapping, 11078aa38c31SChristoph Hellwig buf->start, buf->start + buf->len - 1); 1108e02119d5SChris Mason } 1109e02119d5SChris Mason 1110db94535dSChris Mason struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, 1111ca7a79adSChris Mason u32 blocksize, u64 parent_transid) 1112e20d96d6SChris Mason { 11135f39d397SChris Mason struct extent_buffer *buf = NULL; 111419c00ddcSChris Mason int ret; 111519c00ddcSChris Mason 1116db94535dSChris Mason buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 11175f39d397SChris Mason if (!buf) 1118d98237b3SChris Mason return NULL; 1119e4204dedSChris Mason 1120ca7a79adSChris Mason ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 11215f39d397SChris Mason return buf; 1122ce9adaa5SChris Mason 1123eb60ceacSChris Mason } 1124eb60ceacSChris Mason 1125d5c13f92SJeff Mahoney void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, 11265f39d397SChris Mason struct extent_buffer *buf) 1127ed2ff2cbSChris Mason { 112855c69072SChris Mason if (btrfs_header_generation(buf) == 1129925baeddSChris Mason root->fs_info->running_transaction->transid) { 1130b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 1131b4ce94deSChris Mason 1132b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { 1133b9473439SChris Mason spin_lock(&root->fs_info->delalloc_lock); 1134b9473439SChris Mason if (root->fs_info->dirty_metadata_bytes >= buf->len) 1135b9473439SChris Mason root->fs_info->dirty_metadata_bytes -= buf->len; 1136d5c13f92SJeff Mahoney else { 1137d5c13f92SJeff Mahoney spin_unlock(&root->fs_info->delalloc_lock); 1138d5c13f92SJeff Mahoney btrfs_panic(root->fs_info, -EOVERFLOW, 1139d5c13f92SJeff Mahoney "Can't clear %lu bytes from " 1140533574c6SJoe Perches " dirty_mdatadata_bytes (%llu)", 1141d5c13f92SJeff Mahoney buf->len, 1142d5c13f92SJeff Mahoney root->fs_info->dirty_metadata_bytes); 1143d5c13f92SJeff Mahoney } 1144b9473439SChris Mason spin_unlock(&root->fs_info->delalloc_lock); 1145b4ce94deSChris Mason 1146b9473439SChris Mason /* ugh, clear_extent_buffer_dirty needs to lock the page */ 1147b9473439SChris Mason btrfs_set_lock_blocking(buf); 11480b32f4bbSJosef Bacik clear_extent_buffer_dirty(buf); 1149925baeddSChris Mason } 11505f39d397SChris Mason } 1151ed7b63ebSJosef Bacik } 11525f39d397SChris Mason 1153143bede5SJeff Mahoney static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, 115487ee04ebSChris Mason u32 stripesize, struct btrfs_root *root, 11559f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 1156e20d96d6SChris Mason u64 objectid) 1157d97e63b6SChris Mason { 1158cfaa7295SChris Mason root->node = NULL; 1159a28ec197SChris Mason root->commit_root = NULL; 1160db94535dSChris Mason root->sectorsize = sectorsize; 1161db94535dSChris Mason root->nodesize = nodesize; 1162db94535dSChris Mason root->leafsize = leafsize; 116387ee04ebSChris Mason root->stripesize = stripesize; 1164123abc88SChris Mason root->ref_cows = 0; 11650b86a832SChris Mason root->track_dirty = 0; 1166c71bf099SYan, Zheng root->in_radix = 0; 1167d68fc57bSYan, Zheng root->orphan_item_inserted = 0; 1168d68fc57bSYan, Zheng root->orphan_cleanup_state = 0; 11690b86a832SChris Mason 11700f7d52f4SChris Mason root->objectid = objectid; 11710f7d52f4SChris Mason root->last_trans = 0; 117213a8a7c8SYan, Zheng root->highest_objectid = 0; 117358176a96SJosef Bacik root->name = NULL; 11746bef4d31SEric Paris root->inode_tree = RB_ROOT; 117516cdcec7SMiao Xie INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); 1176f0486c68SYan, Zheng root->block_rsv = NULL; 1177d68fc57bSYan, Zheng root->orphan_block_rsv = NULL; 11780b86a832SChris Mason 11790b86a832SChris Mason INIT_LIST_HEAD(&root->dirty_list); 11805d4f98a2SYan Zheng INIT_LIST_HEAD(&root->root_list); 1181d68fc57bSYan, Zheng spin_lock_init(&root->orphan_lock); 11825d4f98a2SYan Zheng spin_lock_init(&root->inode_lock); 1183f0486c68SYan, Zheng spin_lock_init(&root->accounting_lock); 1184a2135011SChris Mason mutex_init(&root->objectid_mutex); 1185e02119d5SChris Mason mutex_init(&root->log_mutex); 11867237f183SYan Zheng init_waitqueue_head(&root->log_writer_wait); 11877237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[0]); 11887237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[1]); 11897237f183SYan Zheng atomic_set(&root->log_commit[0], 0); 11907237f183SYan Zheng atomic_set(&root->log_commit[1], 0); 11917237f183SYan Zheng atomic_set(&root->log_writers, 0); 11922ecb7923SMiao Xie atomic_set(&root->log_batch, 0); 11938a35d95fSJosef Bacik atomic_set(&root->orphan_inodes, 0); 11947237f183SYan Zheng root->log_transid = 0; 1195257c62e1SChris Mason root->last_log_commit = 0; 1196d0c803c4SChris Mason extent_io_tree_init(&root->dirty_log_pages, 1197f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 1198017e5369SChris Mason 11993768f368SChris Mason memset(&root->root_key, 0, sizeof(root->root_key)); 12003768f368SChris Mason memset(&root->root_item, 0, sizeof(root->root_item)); 12016702ed49SChris Mason memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); 120258176a96SJosef Bacik memset(&root->root_kobj, 0, sizeof(root->root_kobj)); 12033f157a2fSChris Mason root->defrag_trans_start = fs_info->generation; 120458176a96SJosef Bacik init_completion(&root->kobj_unregister); 12056702ed49SChris Mason root->defrag_running = 0; 12064d775673SChris Mason root->root_key.objectid = objectid; 12070ee5dc67SAl Viro root->anon_dev = 0; 12088ea05e3aSAlexander Block 12095f3ab90aSAnand Jain spin_lock_init(&root->root_item_lock); 12103768f368SChris Mason } 12113768f368SChris Mason 1212200a5c17SJeff Mahoney static int __must_check find_and_setup_root(struct btrfs_root *tree_root, 12139f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 12149f5fae2fSChris Mason u64 objectid, 1215e20d96d6SChris Mason struct btrfs_root *root) 12163768f368SChris Mason { 12173768f368SChris Mason int ret; 1218db94535dSChris Mason u32 blocksize; 121984234f3aSYan Zheng u64 generation; 12203768f368SChris Mason 1221db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 122287ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 122387ee04ebSChris Mason root, fs_info, objectid); 12243768f368SChris Mason ret = btrfs_find_last_root(tree_root, objectid, 12253768f368SChris Mason &root->root_item, &root->root_key); 12264df27c4dSYan, Zheng if (ret > 0) 12274df27c4dSYan, Zheng return -ENOENT; 1228200a5c17SJeff Mahoney else if (ret < 0) 1229200a5c17SJeff Mahoney return ret; 12303768f368SChris Mason 123184234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1232db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1233af31f5e5SChris Mason root->commit_root = NULL; 1234db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 123584234f3aSYan Zheng blocksize, generation); 1236b9fab919SChris Mason if (!root->node || !btrfs_buffer_uptodate(root->node, generation, 0)) { 123768433b73SChris Mason free_extent_buffer(root->node); 1238af31f5e5SChris Mason root->node = NULL; 123968433b73SChris Mason return -EIO; 124068433b73SChris Mason } 12414df27c4dSYan, Zheng root->commit_root = btrfs_root_node(root); 1242d97e63b6SChris Mason return 0; 1243d97e63b6SChris Mason } 1244d97e63b6SChris Mason 1245f84a8bd6SAl Viro static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info) 12466f07e42eSAl Viro { 12476f07e42eSAl Viro struct btrfs_root *root = kzalloc(sizeof(*root), GFP_NOFS); 12486f07e42eSAl Viro if (root) 12496f07e42eSAl Viro root->fs_info = fs_info; 12506f07e42eSAl Viro return root; 12516f07e42eSAl Viro } 12526f07e42eSAl Viro 125320897f5cSArne Jansen struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, 125420897f5cSArne Jansen struct btrfs_fs_info *fs_info, 125520897f5cSArne Jansen u64 objectid) 125620897f5cSArne Jansen { 125720897f5cSArne Jansen struct extent_buffer *leaf; 125820897f5cSArne Jansen struct btrfs_root *tree_root = fs_info->tree_root; 125920897f5cSArne Jansen struct btrfs_root *root; 126020897f5cSArne Jansen struct btrfs_key key; 126120897f5cSArne Jansen int ret = 0; 126220897f5cSArne Jansen u64 bytenr; 126320897f5cSArne Jansen 126420897f5cSArne Jansen root = btrfs_alloc_root(fs_info); 126520897f5cSArne Jansen if (!root) 126620897f5cSArne Jansen return ERR_PTR(-ENOMEM); 126720897f5cSArne Jansen 126820897f5cSArne Jansen __setup_root(tree_root->nodesize, tree_root->leafsize, 126920897f5cSArne Jansen tree_root->sectorsize, tree_root->stripesize, 127020897f5cSArne Jansen root, fs_info, objectid); 127120897f5cSArne Jansen root->root_key.objectid = objectid; 127220897f5cSArne Jansen root->root_key.type = BTRFS_ROOT_ITEM_KEY; 127320897f5cSArne Jansen root->root_key.offset = 0; 127420897f5cSArne Jansen 127520897f5cSArne Jansen leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 127620897f5cSArne Jansen 0, objectid, NULL, 0, 0, 0); 127720897f5cSArne Jansen if (IS_ERR(leaf)) { 127820897f5cSArne Jansen ret = PTR_ERR(leaf); 127920897f5cSArne Jansen goto fail; 128020897f5cSArne Jansen } 128120897f5cSArne Jansen 128220897f5cSArne Jansen bytenr = leaf->start; 128320897f5cSArne Jansen memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 128420897f5cSArne Jansen btrfs_set_header_bytenr(leaf, leaf->start); 128520897f5cSArne Jansen btrfs_set_header_generation(leaf, trans->transid); 128620897f5cSArne Jansen btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 128720897f5cSArne Jansen btrfs_set_header_owner(leaf, objectid); 128820897f5cSArne Jansen root->node = leaf; 128920897f5cSArne Jansen 129020897f5cSArne Jansen write_extent_buffer(leaf, fs_info->fsid, 129120897f5cSArne Jansen (unsigned long)btrfs_header_fsid(leaf), 129220897f5cSArne Jansen BTRFS_FSID_SIZE); 129320897f5cSArne Jansen write_extent_buffer(leaf, fs_info->chunk_tree_uuid, 129420897f5cSArne Jansen (unsigned long)btrfs_header_chunk_tree_uuid(leaf), 129520897f5cSArne Jansen BTRFS_UUID_SIZE); 129620897f5cSArne Jansen btrfs_mark_buffer_dirty(leaf); 129720897f5cSArne Jansen 129820897f5cSArne Jansen root->commit_root = btrfs_root_node(root); 129920897f5cSArne Jansen root->track_dirty = 1; 130020897f5cSArne Jansen 130120897f5cSArne Jansen 130220897f5cSArne Jansen root->root_item.flags = 0; 130320897f5cSArne Jansen root->root_item.byte_limit = 0; 130420897f5cSArne Jansen btrfs_set_root_bytenr(&root->root_item, leaf->start); 130520897f5cSArne Jansen btrfs_set_root_generation(&root->root_item, trans->transid); 130620897f5cSArne Jansen btrfs_set_root_level(&root->root_item, 0); 130720897f5cSArne Jansen btrfs_set_root_refs(&root->root_item, 1); 130820897f5cSArne Jansen btrfs_set_root_used(&root->root_item, leaf->len); 130920897f5cSArne Jansen btrfs_set_root_last_snapshot(&root->root_item, 0); 131020897f5cSArne Jansen btrfs_set_root_dirid(&root->root_item, 0); 131120897f5cSArne Jansen root->root_item.drop_level = 0; 131220897f5cSArne Jansen 131320897f5cSArne Jansen key.objectid = objectid; 131420897f5cSArne Jansen key.type = BTRFS_ROOT_ITEM_KEY; 131520897f5cSArne Jansen key.offset = 0; 131620897f5cSArne Jansen ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); 131720897f5cSArne Jansen if (ret) 131820897f5cSArne Jansen goto fail; 131920897f5cSArne Jansen 132020897f5cSArne Jansen btrfs_tree_unlock(leaf); 132120897f5cSArne Jansen 132220897f5cSArne Jansen fail: 132320897f5cSArne Jansen if (ret) 132420897f5cSArne Jansen return ERR_PTR(ret); 132520897f5cSArne Jansen 132620897f5cSArne Jansen return root; 132720897f5cSArne Jansen } 132820897f5cSArne Jansen 13297237f183SYan Zheng static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, 1330e02119d5SChris Mason struct btrfs_fs_info *fs_info) 13310f7d52f4SChris Mason { 13320f7d52f4SChris Mason struct btrfs_root *root; 13330f7d52f4SChris Mason struct btrfs_root *tree_root = fs_info->tree_root; 13347237f183SYan Zheng struct extent_buffer *leaf; 1335e02119d5SChris Mason 13366f07e42eSAl Viro root = btrfs_alloc_root(fs_info); 1337e02119d5SChris Mason if (!root) 13387237f183SYan Zheng return ERR_PTR(-ENOMEM); 1339e02119d5SChris Mason 1340e02119d5SChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 1341e02119d5SChris Mason tree_root->sectorsize, tree_root->stripesize, 1342e02119d5SChris Mason root, fs_info, BTRFS_TREE_LOG_OBJECTID); 1343e02119d5SChris Mason 1344e02119d5SChris Mason root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 1345e02119d5SChris Mason root->root_key.type = BTRFS_ROOT_ITEM_KEY; 1346e02119d5SChris Mason root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 13477237f183SYan Zheng /* 13487237f183SYan Zheng * log trees do not get reference counted because they go away 13497237f183SYan Zheng * before a real commit is actually done. They do store pointers 13507237f183SYan Zheng * to file data extents, and those reference counts still get 13517237f183SYan Zheng * updated (along with back refs to the log tree). 13527237f183SYan Zheng */ 1353e02119d5SChris Mason root->ref_cows = 0; 1354e02119d5SChris Mason 13555d4f98a2SYan Zheng leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, 135666d7e7f0SArne Jansen BTRFS_TREE_LOG_OBJECTID, NULL, 13575581a51aSJan Schmidt 0, 0, 0); 13587237f183SYan Zheng if (IS_ERR(leaf)) { 13597237f183SYan Zheng kfree(root); 13607237f183SYan Zheng return ERR_CAST(leaf); 13617237f183SYan Zheng } 1362e02119d5SChris Mason 13635d4f98a2SYan Zheng memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 13645d4f98a2SYan Zheng btrfs_set_header_bytenr(leaf, leaf->start); 13655d4f98a2SYan Zheng btrfs_set_header_generation(leaf, trans->transid); 13665d4f98a2SYan Zheng btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 13675d4f98a2SYan Zheng btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); 13687237f183SYan Zheng root->node = leaf; 1369e02119d5SChris Mason 1370e02119d5SChris Mason write_extent_buffer(root->node, root->fs_info->fsid, 1371e02119d5SChris Mason (unsigned long)btrfs_header_fsid(root->node), 1372e02119d5SChris Mason BTRFS_FSID_SIZE); 1373e02119d5SChris Mason btrfs_mark_buffer_dirty(root->node); 1374e02119d5SChris Mason btrfs_tree_unlock(root->node); 13757237f183SYan Zheng return root; 13767237f183SYan Zheng } 13777237f183SYan Zheng 13787237f183SYan Zheng int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 13797237f183SYan Zheng struct btrfs_fs_info *fs_info) 13807237f183SYan Zheng { 13817237f183SYan Zheng struct btrfs_root *log_root; 13827237f183SYan Zheng 13837237f183SYan Zheng log_root = alloc_log_tree(trans, fs_info); 13847237f183SYan Zheng if (IS_ERR(log_root)) 13857237f183SYan Zheng return PTR_ERR(log_root); 13867237f183SYan Zheng WARN_ON(fs_info->log_root_tree); 13877237f183SYan Zheng fs_info->log_root_tree = log_root; 13887237f183SYan Zheng return 0; 13897237f183SYan Zheng } 13907237f183SYan Zheng 13917237f183SYan Zheng int btrfs_add_log_tree(struct btrfs_trans_handle *trans, 13927237f183SYan Zheng struct btrfs_root *root) 13937237f183SYan Zheng { 13947237f183SYan Zheng struct btrfs_root *log_root; 13957237f183SYan Zheng struct btrfs_inode_item *inode_item; 13967237f183SYan Zheng 13977237f183SYan Zheng log_root = alloc_log_tree(trans, root->fs_info); 13987237f183SYan Zheng if (IS_ERR(log_root)) 13997237f183SYan Zheng return PTR_ERR(log_root); 14007237f183SYan Zheng 14017237f183SYan Zheng log_root->last_trans = trans->transid; 14027237f183SYan Zheng log_root->root_key.offset = root->root_key.objectid; 14037237f183SYan Zheng 14047237f183SYan Zheng inode_item = &log_root->root_item.inode; 14057237f183SYan Zheng inode_item->generation = cpu_to_le64(1); 14067237f183SYan Zheng inode_item->size = cpu_to_le64(3); 14077237f183SYan Zheng inode_item->nlink = cpu_to_le32(1); 14087237f183SYan Zheng inode_item->nbytes = cpu_to_le64(root->leafsize); 14097237f183SYan Zheng inode_item->mode = cpu_to_le32(S_IFDIR | 0755); 14107237f183SYan Zheng 14115d4f98a2SYan Zheng btrfs_set_root_node(&log_root->root_item, log_root->node); 14127237f183SYan Zheng 14137237f183SYan Zheng WARN_ON(root->log_root); 14147237f183SYan Zheng root->log_root = log_root; 14157237f183SYan Zheng root->log_transid = 0; 1416257c62e1SChris Mason root->last_log_commit = 0; 1417e02119d5SChris Mason return 0; 1418e02119d5SChris Mason } 1419e02119d5SChris Mason 1420e02119d5SChris Mason struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, 1421e02119d5SChris Mason struct btrfs_key *location) 1422e02119d5SChris Mason { 1423e02119d5SChris Mason struct btrfs_root *root; 1424e02119d5SChris Mason struct btrfs_fs_info *fs_info = tree_root->fs_info; 14250f7d52f4SChris Mason struct btrfs_path *path; 14265f39d397SChris Mason struct extent_buffer *l; 142784234f3aSYan Zheng u64 generation; 1428db94535dSChris Mason u32 blocksize; 14290f7d52f4SChris Mason int ret = 0; 14308ea05e3aSAlexander Block int slot; 14310f7d52f4SChris Mason 14326f07e42eSAl Viro root = btrfs_alloc_root(fs_info); 14330cf6c620SChris Mason if (!root) 14340f7d52f4SChris Mason return ERR_PTR(-ENOMEM); 14350f7d52f4SChris Mason if (location->offset == (u64)-1) { 1436db94535dSChris Mason ret = find_and_setup_root(tree_root, fs_info, 14370f7d52f4SChris Mason location->objectid, root); 14380f7d52f4SChris Mason if (ret) { 14390f7d52f4SChris Mason kfree(root); 14400f7d52f4SChris Mason return ERR_PTR(ret); 14410f7d52f4SChris Mason } 144213a8a7c8SYan, Zheng goto out; 14430f7d52f4SChris Mason } 14440f7d52f4SChris Mason 1445db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 144687ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 144787ee04ebSChris Mason root, fs_info, location->objectid); 14480f7d52f4SChris Mason 14490f7d52f4SChris Mason path = btrfs_alloc_path(); 1450db5b493aSTsutomu Itoh if (!path) { 1451db5b493aSTsutomu Itoh kfree(root); 1452db5b493aSTsutomu Itoh return ERR_PTR(-ENOMEM); 1453db5b493aSTsutomu Itoh } 14540f7d52f4SChris Mason ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); 145513a8a7c8SYan, Zheng if (ret == 0) { 14565f39d397SChris Mason l = path->nodes[0]; 14578ea05e3aSAlexander Block slot = path->slots[0]; 14588ea05e3aSAlexander Block btrfs_read_root_item(tree_root, l, slot, &root->root_item); 145944b36eb2SYan Zheng memcpy(&root->root_key, location, sizeof(*location)); 146013a8a7c8SYan, Zheng } 14610f7d52f4SChris Mason btrfs_free_path(path); 14620f7d52f4SChris Mason if (ret) { 14635e540f77STsutomu Itoh kfree(root); 146413a8a7c8SYan, Zheng if (ret > 0) 146513a8a7c8SYan, Zheng ret = -ENOENT; 14660f7d52f4SChris Mason return ERR_PTR(ret); 14670f7d52f4SChris Mason } 146813a8a7c8SYan, Zheng 146984234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1470db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1471db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 147284234f3aSYan Zheng blocksize, generation); 14735d4f98a2SYan Zheng root->commit_root = btrfs_root_node(root); 147479787eaaSJeff Mahoney BUG_ON(!root->node); /* -ENOMEM */ 147513a8a7c8SYan, Zheng out: 147608fe4db1SLi Zefan if (location->objectid != BTRFS_TREE_LOG_OBJECTID) { 14770f7d52f4SChris Mason root->ref_cows = 1; 147808fe4db1SLi Zefan btrfs_check_and_init_root_item(&root->root_item); 147908fe4db1SLi Zefan } 148013a8a7c8SYan, Zheng 14815eda7b5eSChris Mason return root; 14825eda7b5eSChris Mason } 14835eda7b5eSChris Mason 1484edbd8d4eSChris Mason struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, 1485edbd8d4eSChris Mason struct btrfs_key *location) 14865eda7b5eSChris Mason { 14875eda7b5eSChris Mason struct btrfs_root *root; 14885eda7b5eSChris Mason int ret; 14895eda7b5eSChris Mason 1490edbd8d4eSChris Mason if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) 1491edbd8d4eSChris Mason return fs_info->tree_root; 1492edbd8d4eSChris Mason if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) 1493edbd8d4eSChris Mason return fs_info->extent_root; 14948f18cf13SChris Mason if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) 14958f18cf13SChris Mason return fs_info->chunk_root; 14968f18cf13SChris Mason if (location->objectid == BTRFS_DEV_TREE_OBJECTID) 14978f18cf13SChris Mason return fs_info->dev_root; 14980403e47eSYan Zheng if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) 14990403e47eSYan Zheng return fs_info->csum_root; 1500bcef60f2SArne Jansen if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) 1501bcef60f2SArne Jansen return fs_info->quota_root ? fs_info->quota_root : 1502bcef60f2SArne Jansen ERR_PTR(-ENOENT); 15034df27c4dSYan, Zheng again: 15044df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 15055eda7b5eSChris Mason root = radix_tree_lookup(&fs_info->fs_roots_radix, 15065eda7b5eSChris Mason (unsigned long)location->objectid); 15074df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 15085eda7b5eSChris Mason if (root) 15095eda7b5eSChris Mason return root; 15105eda7b5eSChris Mason 1511e02119d5SChris Mason root = btrfs_read_fs_root_no_radix(fs_info->tree_root, location); 15125eda7b5eSChris Mason if (IS_ERR(root)) 15135eda7b5eSChris Mason return root; 15143394e160SChris Mason 1515581bb050SLi Zefan root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); 1516581bb050SLi Zefan root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), 1517581bb050SLi Zefan GFP_NOFS); 151835a30d7cSDavid Sterba if (!root->free_ino_pinned || !root->free_ino_ctl) { 151935a30d7cSDavid Sterba ret = -ENOMEM; 1520581bb050SLi Zefan goto fail; 152135a30d7cSDavid Sterba } 1522581bb050SLi Zefan 1523581bb050SLi Zefan btrfs_init_free_ino_ctl(root); 1524581bb050SLi Zefan mutex_init(&root->fs_commit_mutex); 1525581bb050SLi Zefan spin_lock_init(&root->cache_lock); 1526581bb050SLi Zefan init_waitqueue_head(&root->cache_wait); 1527581bb050SLi Zefan 15280ee5dc67SAl Viro ret = get_anon_bdev(&root->anon_dev); 1529ac08aedfSChris Mason if (ret) 1530ac08aedfSChris Mason goto fail; 15313394e160SChris Mason 1532d68fc57bSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) { 1533d68fc57bSYan, Zheng ret = -ENOENT; 1534d68fc57bSYan, Zheng goto fail; 1535d68fc57bSYan, Zheng } 1536d68fc57bSYan, Zheng 1537d68fc57bSYan, Zheng ret = btrfs_find_orphan_item(fs_info->tree_root, location->objectid); 1538d68fc57bSYan, Zheng if (ret < 0) 1539d68fc57bSYan, Zheng goto fail; 1540d68fc57bSYan, Zheng if (ret == 0) 1541d68fc57bSYan, Zheng root->orphan_item_inserted = 1; 1542d68fc57bSYan, Zheng 15434df27c4dSYan, Zheng ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); 15444df27c4dSYan, Zheng if (ret) 15454df27c4dSYan, Zheng goto fail; 15464df27c4dSYan, Zheng 15474df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 15482619ba1fSChris Mason ret = radix_tree_insert(&fs_info->fs_roots_radix, 15492619ba1fSChris Mason (unsigned long)root->root_key.objectid, 15500f7d52f4SChris Mason root); 1551d68fc57bSYan, Zheng if (ret == 0) 15524df27c4dSYan, Zheng root->in_radix = 1; 1553d68fc57bSYan, Zheng 15544df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 15554df27c4dSYan, Zheng radix_tree_preload_end(); 15560f7d52f4SChris Mason if (ret) { 15574df27c4dSYan, Zheng if (ret == -EEXIST) { 15584df27c4dSYan, Zheng free_fs_root(root); 15594df27c4dSYan, Zheng goto again; 15600f7d52f4SChris Mason } 15614df27c4dSYan, Zheng goto fail; 15624df27c4dSYan, Zheng } 15634df27c4dSYan, Zheng 1564edbd8d4eSChris Mason ret = btrfs_find_dead_roots(fs_info->tree_root, 15655d4f98a2SYan Zheng root->root_key.objectid); 15664df27c4dSYan, Zheng WARN_ON(ret); 1567edbd8d4eSChris Mason return root; 15684df27c4dSYan, Zheng fail: 15694df27c4dSYan, Zheng free_fs_root(root); 15704df27c4dSYan, Zheng return ERR_PTR(ret); 1571edbd8d4eSChris Mason } 1572edbd8d4eSChris Mason 157304160088SChris Mason static int btrfs_congested_fn(void *congested_data, int bdi_bits) 157404160088SChris Mason { 157504160088SChris Mason struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; 157604160088SChris Mason int ret = 0; 157704160088SChris Mason struct btrfs_device *device; 157804160088SChris Mason struct backing_dev_info *bdi; 1579b7967db7SChris Mason 15801f78160cSXiao Guangrong rcu_read_lock(); 15811f78160cSXiao Guangrong list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { 1582dfe25020SChris Mason if (!device->bdev) 1583dfe25020SChris Mason continue; 158404160088SChris Mason bdi = blk_get_backing_dev_info(device->bdev); 158504160088SChris Mason if (bdi && bdi_congested(bdi, bdi_bits)) { 158604160088SChris Mason ret = 1; 158704160088SChris Mason break; 158804160088SChris Mason } 158904160088SChris Mason } 15901f78160cSXiao Guangrong rcu_read_unlock(); 159104160088SChris Mason return ret; 159204160088SChris Mason } 159304160088SChris Mason 159438b66988SChris Mason /* 1595ad081f14SJens Axboe * If this fails, caller must call bdi_destroy() to get rid of the 1596ad081f14SJens Axboe * bdi again. 1597ad081f14SJens Axboe */ 159804160088SChris Mason static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) 159904160088SChris Mason { 1600ad081f14SJens Axboe int err; 1601ad081f14SJens Axboe 1602ad081f14SJens Axboe bdi->capabilities = BDI_CAP_MAP_COPY; 1603e6d086d8SJens Axboe err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY); 1604ad081f14SJens Axboe if (err) 1605ad081f14SJens Axboe return err; 1606ad081f14SJens Axboe 16074575c9ccSChris Mason bdi->ra_pages = default_backing_dev_info.ra_pages; 160804160088SChris Mason bdi->congested_fn = btrfs_congested_fn; 160904160088SChris Mason bdi->congested_data = info; 161004160088SChris Mason return 0; 161104160088SChris Mason } 161204160088SChris Mason 16138b712842SChris Mason /* 16148b712842SChris Mason * called by the kthread helper functions to finally call the bio end_io 16158b712842SChris Mason * functions. This is where read checksum verification actually happens 16168b712842SChris Mason */ 16178b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work) 1618ce9adaa5SChris Mason { 1619ce9adaa5SChris Mason struct bio *bio; 16208b712842SChris Mason struct end_io_wq *end_io_wq; 16218b712842SChris Mason struct btrfs_fs_info *fs_info; 1622ce9adaa5SChris Mason int error; 1623ce9adaa5SChris Mason 16248b712842SChris Mason end_io_wq = container_of(work, struct end_io_wq, work); 1625ce9adaa5SChris Mason bio = end_io_wq->bio; 16268b712842SChris Mason fs_info = end_io_wq->info; 16278b712842SChris Mason 1628ce9adaa5SChris Mason error = end_io_wq->error; 1629ce9adaa5SChris Mason bio->bi_private = end_io_wq->private; 1630ce9adaa5SChris Mason bio->bi_end_io = end_io_wq->end_io; 1631ce9adaa5SChris Mason kfree(end_io_wq); 1632ce9adaa5SChris Mason bio_endio(bio, error); 1633ce9adaa5SChris Mason } 163444b8bd7eSChris Mason 1635a74a4b97SChris Mason static int cleaner_kthread(void *arg) 1636a74a4b97SChris Mason { 1637a74a4b97SChris Mason struct btrfs_root *root = arg; 1638a74a4b97SChris Mason 1639a74a4b97SChris Mason do { 164076dda93cSYan, Zheng if (!(root->fs_info->sb->s_flags & MS_RDONLY) && 164176dda93cSYan, Zheng mutex_trylock(&root->fs_info->cleaner_mutex)) { 164224bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 1643a74a4b97SChris Mason btrfs_clean_old_snapshots(root); 1644a74a4b97SChris Mason mutex_unlock(&root->fs_info->cleaner_mutex); 16454cb5300bSChris Mason btrfs_run_defrag_inodes(root->fs_info); 164676dda93cSYan, Zheng } 1647a74a4b97SChris Mason 1648a0acae0eSTejun Heo if (!try_to_freeze()) { 1649a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 16508929ecfaSYan, Zheng if (!kthread_should_stop()) 1651a74a4b97SChris Mason schedule(); 1652a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1653a74a4b97SChris Mason } 1654a74a4b97SChris Mason } while (!kthread_should_stop()); 1655a74a4b97SChris Mason return 0; 1656a74a4b97SChris Mason } 1657a74a4b97SChris Mason 1658a74a4b97SChris Mason static int transaction_kthread(void *arg) 1659a74a4b97SChris Mason { 1660a74a4b97SChris Mason struct btrfs_root *root = arg; 1661a74a4b97SChris Mason struct btrfs_trans_handle *trans; 1662a74a4b97SChris Mason struct btrfs_transaction *cur; 16638929ecfaSYan, Zheng u64 transid; 1664a74a4b97SChris Mason unsigned long now; 1665a74a4b97SChris Mason unsigned long delay; 1666914b2007SJan Kara bool cannot_commit; 1667a74a4b97SChris Mason 1668a74a4b97SChris Mason do { 1669914b2007SJan Kara cannot_commit = false; 1670a74a4b97SChris Mason delay = HZ * 30; 1671a74a4b97SChris Mason mutex_lock(&root->fs_info->transaction_kthread_mutex); 1672a74a4b97SChris Mason 1673a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 1674a74a4b97SChris Mason cur = root->fs_info->running_transaction; 1675a74a4b97SChris Mason if (!cur) { 1676a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1677a74a4b97SChris Mason goto sleep; 1678a74a4b97SChris Mason } 167931153d81SYan Zheng 1680a74a4b97SChris Mason now = get_seconds(); 16818929ecfaSYan, Zheng if (!cur->blocked && 16828929ecfaSYan, Zheng (now < cur->start_time || now - cur->start_time < 30)) { 1683a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1684a74a4b97SChris Mason delay = HZ * 5; 1685a74a4b97SChris Mason goto sleep; 1686a74a4b97SChris Mason } 16878929ecfaSYan, Zheng transid = cur->transid; 1688a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 168956bec294SChris Mason 169079787eaaSJeff Mahoney /* If the file system is aborted, this will always fail. */ 1691354aa0fbSMiao Xie trans = btrfs_attach_transaction(root); 1692914b2007SJan Kara if (IS_ERR(trans)) { 1693354aa0fbSMiao Xie if (PTR_ERR(trans) != -ENOENT) 1694914b2007SJan Kara cannot_commit = true; 169579787eaaSJeff Mahoney goto sleep; 1696914b2007SJan Kara } 16978929ecfaSYan, Zheng if (transid == trans->transid) { 169879787eaaSJeff Mahoney btrfs_commit_transaction(trans, root); 16998929ecfaSYan, Zheng } else { 17008929ecfaSYan, Zheng btrfs_end_transaction(trans, root); 17018929ecfaSYan, Zheng } 1702a74a4b97SChris Mason sleep: 1703a74a4b97SChris Mason wake_up_process(root->fs_info->cleaner_kthread); 1704a74a4b97SChris Mason mutex_unlock(&root->fs_info->transaction_kthread_mutex); 1705a74a4b97SChris Mason 1706a0acae0eSTejun Heo if (!try_to_freeze()) { 1707a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 17088929ecfaSYan, Zheng if (!kthread_should_stop() && 1709914b2007SJan Kara (!btrfs_transaction_blocked(root->fs_info) || 1710914b2007SJan Kara cannot_commit)) 1711a74a4b97SChris Mason schedule_timeout(delay); 1712a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1713a74a4b97SChris Mason } 1714a74a4b97SChris Mason } while (!kthread_should_stop()); 1715a74a4b97SChris Mason return 0; 1716a74a4b97SChris Mason } 1717a74a4b97SChris Mason 1718af31f5e5SChris Mason /* 1719af31f5e5SChris Mason * this will find the highest generation in the array of 1720af31f5e5SChris Mason * root backups. The index of the highest array is returned, 1721af31f5e5SChris Mason * or -1 if we can't find anything. 1722af31f5e5SChris Mason * 1723af31f5e5SChris Mason * We check to make sure the array is valid by comparing the 1724af31f5e5SChris Mason * generation of the latest root in the array with the generation 1725af31f5e5SChris Mason * in the super block. If they don't match we pitch it. 1726af31f5e5SChris Mason */ 1727af31f5e5SChris Mason static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) 1728af31f5e5SChris Mason { 1729af31f5e5SChris Mason u64 cur; 1730af31f5e5SChris Mason int newest_index = -1; 1731af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1732af31f5e5SChris Mason int i; 1733af31f5e5SChris Mason 1734af31f5e5SChris Mason for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 1735af31f5e5SChris Mason root_backup = info->super_copy->super_roots + i; 1736af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1737af31f5e5SChris Mason if (cur == newest_gen) 1738af31f5e5SChris Mason newest_index = i; 1739af31f5e5SChris Mason } 1740af31f5e5SChris Mason 1741af31f5e5SChris Mason /* check to see if we actually wrapped around */ 1742af31f5e5SChris Mason if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { 1743af31f5e5SChris Mason root_backup = info->super_copy->super_roots; 1744af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1745af31f5e5SChris Mason if (cur == newest_gen) 1746af31f5e5SChris Mason newest_index = 0; 1747af31f5e5SChris Mason } 1748af31f5e5SChris Mason return newest_index; 1749af31f5e5SChris Mason } 1750af31f5e5SChris Mason 1751af31f5e5SChris Mason 1752af31f5e5SChris Mason /* 1753af31f5e5SChris Mason * find the oldest backup so we know where to store new entries 1754af31f5e5SChris Mason * in the backup array. This will set the backup_root_index 1755af31f5e5SChris Mason * field in the fs_info struct 1756af31f5e5SChris Mason */ 1757af31f5e5SChris Mason static void find_oldest_super_backup(struct btrfs_fs_info *info, 1758af31f5e5SChris Mason u64 newest_gen) 1759af31f5e5SChris Mason { 1760af31f5e5SChris Mason int newest_index = -1; 1761af31f5e5SChris Mason 1762af31f5e5SChris Mason newest_index = find_newest_super_backup(info, newest_gen); 1763af31f5e5SChris Mason /* if there was garbage in there, just move along */ 1764af31f5e5SChris Mason if (newest_index == -1) { 1765af31f5e5SChris Mason info->backup_root_index = 0; 1766af31f5e5SChris Mason } else { 1767af31f5e5SChris Mason info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; 1768af31f5e5SChris Mason } 1769af31f5e5SChris Mason } 1770af31f5e5SChris Mason 1771af31f5e5SChris Mason /* 1772af31f5e5SChris Mason * copy all the root pointers into the super backup array. 1773af31f5e5SChris Mason * this will bump the backup pointer by one when it is 1774af31f5e5SChris Mason * done 1775af31f5e5SChris Mason */ 1776af31f5e5SChris Mason static void backup_super_roots(struct btrfs_fs_info *info) 1777af31f5e5SChris Mason { 1778af31f5e5SChris Mason int next_backup; 1779af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1780af31f5e5SChris Mason int last_backup; 1781af31f5e5SChris Mason 1782af31f5e5SChris Mason next_backup = info->backup_root_index; 1783af31f5e5SChris Mason last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % 1784af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1785af31f5e5SChris Mason 1786af31f5e5SChris Mason /* 1787af31f5e5SChris Mason * just overwrite the last backup if we're at the same generation 1788af31f5e5SChris Mason * this happens only at umount 1789af31f5e5SChris Mason */ 1790af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + last_backup; 1791af31f5e5SChris Mason if (btrfs_backup_tree_root_gen(root_backup) == 1792af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)) 1793af31f5e5SChris Mason next_backup = last_backup; 1794af31f5e5SChris Mason 1795af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + next_backup; 1796af31f5e5SChris Mason 1797af31f5e5SChris Mason /* 1798af31f5e5SChris Mason * make sure all of our padding and empty slots get zero filled 1799af31f5e5SChris Mason * regardless of which ones we use today 1800af31f5e5SChris Mason */ 1801af31f5e5SChris Mason memset(root_backup, 0, sizeof(*root_backup)); 1802af31f5e5SChris Mason 1803af31f5e5SChris Mason info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; 1804af31f5e5SChris Mason 1805af31f5e5SChris Mason btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); 1806af31f5e5SChris Mason btrfs_set_backup_tree_root_gen(root_backup, 1807af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)); 1808af31f5e5SChris Mason 1809af31f5e5SChris Mason btrfs_set_backup_tree_root_level(root_backup, 1810af31f5e5SChris Mason btrfs_header_level(info->tree_root->node)); 1811af31f5e5SChris Mason 1812af31f5e5SChris Mason btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); 1813af31f5e5SChris Mason btrfs_set_backup_chunk_root_gen(root_backup, 1814af31f5e5SChris Mason btrfs_header_generation(info->chunk_root->node)); 1815af31f5e5SChris Mason btrfs_set_backup_chunk_root_level(root_backup, 1816af31f5e5SChris Mason btrfs_header_level(info->chunk_root->node)); 1817af31f5e5SChris Mason 1818af31f5e5SChris Mason btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); 1819af31f5e5SChris Mason btrfs_set_backup_extent_root_gen(root_backup, 1820af31f5e5SChris Mason btrfs_header_generation(info->extent_root->node)); 1821af31f5e5SChris Mason btrfs_set_backup_extent_root_level(root_backup, 1822af31f5e5SChris Mason btrfs_header_level(info->extent_root->node)); 1823af31f5e5SChris Mason 18247c7e82a7SChris Mason /* 18257c7e82a7SChris Mason * we might commit during log recovery, which happens before we set 18267c7e82a7SChris Mason * the fs_root. Make sure it is valid before we fill it in. 18277c7e82a7SChris Mason */ 18287c7e82a7SChris Mason if (info->fs_root && info->fs_root->node) { 18297c7e82a7SChris Mason btrfs_set_backup_fs_root(root_backup, 18307c7e82a7SChris Mason info->fs_root->node->start); 1831af31f5e5SChris Mason btrfs_set_backup_fs_root_gen(root_backup, 1832af31f5e5SChris Mason btrfs_header_generation(info->fs_root->node)); 1833af31f5e5SChris Mason btrfs_set_backup_fs_root_level(root_backup, 1834af31f5e5SChris Mason btrfs_header_level(info->fs_root->node)); 18357c7e82a7SChris Mason } 1836af31f5e5SChris Mason 1837af31f5e5SChris Mason btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); 1838af31f5e5SChris Mason btrfs_set_backup_dev_root_gen(root_backup, 1839af31f5e5SChris Mason btrfs_header_generation(info->dev_root->node)); 1840af31f5e5SChris Mason btrfs_set_backup_dev_root_level(root_backup, 1841af31f5e5SChris Mason btrfs_header_level(info->dev_root->node)); 1842af31f5e5SChris Mason 1843af31f5e5SChris Mason btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); 1844af31f5e5SChris Mason btrfs_set_backup_csum_root_gen(root_backup, 1845af31f5e5SChris Mason btrfs_header_generation(info->csum_root->node)); 1846af31f5e5SChris Mason btrfs_set_backup_csum_root_level(root_backup, 1847af31f5e5SChris Mason btrfs_header_level(info->csum_root->node)); 1848af31f5e5SChris Mason 1849af31f5e5SChris Mason btrfs_set_backup_total_bytes(root_backup, 1850af31f5e5SChris Mason btrfs_super_total_bytes(info->super_copy)); 1851af31f5e5SChris Mason btrfs_set_backup_bytes_used(root_backup, 1852af31f5e5SChris Mason btrfs_super_bytes_used(info->super_copy)); 1853af31f5e5SChris Mason btrfs_set_backup_num_devices(root_backup, 1854af31f5e5SChris Mason btrfs_super_num_devices(info->super_copy)); 1855af31f5e5SChris Mason 1856af31f5e5SChris Mason /* 1857af31f5e5SChris Mason * if we don't copy this out to the super_copy, it won't get remembered 1858af31f5e5SChris Mason * for the next commit 1859af31f5e5SChris Mason */ 1860af31f5e5SChris Mason memcpy(&info->super_copy->super_roots, 1861af31f5e5SChris Mason &info->super_for_commit->super_roots, 1862af31f5e5SChris Mason sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); 1863af31f5e5SChris Mason } 1864af31f5e5SChris Mason 1865af31f5e5SChris Mason /* 1866af31f5e5SChris Mason * this copies info out of the root backup array and back into 1867af31f5e5SChris Mason * the in-memory super block. It is meant to help iterate through 1868af31f5e5SChris Mason * the array, so you send it the number of backups you've already 1869af31f5e5SChris Mason * tried and the last backup index you used. 1870af31f5e5SChris Mason * 1871af31f5e5SChris Mason * this returns -1 when it has tried all the backups 1872af31f5e5SChris Mason */ 1873af31f5e5SChris Mason static noinline int next_root_backup(struct btrfs_fs_info *info, 1874af31f5e5SChris Mason struct btrfs_super_block *super, 1875af31f5e5SChris Mason int *num_backups_tried, int *backup_index) 1876af31f5e5SChris Mason { 1877af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1878af31f5e5SChris Mason int newest = *backup_index; 1879af31f5e5SChris Mason 1880af31f5e5SChris Mason if (*num_backups_tried == 0) { 1881af31f5e5SChris Mason u64 gen = btrfs_super_generation(super); 1882af31f5e5SChris Mason 1883af31f5e5SChris Mason newest = find_newest_super_backup(info, gen); 1884af31f5e5SChris Mason if (newest == -1) 1885af31f5e5SChris Mason return -1; 1886af31f5e5SChris Mason 1887af31f5e5SChris Mason *backup_index = newest; 1888af31f5e5SChris Mason *num_backups_tried = 1; 1889af31f5e5SChris Mason } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { 1890af31f5e5SChris Mason /* we've tried all the backups, all done */ 1891af31f5e5SChris Mason return -1; 1892af31f5e5SChris Mason } else { 1893af31f5e5SChris Mason /* jump to the next oldest backup */ 1894af31f5e5SChris Mason newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % 1895af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1896af31f5e5SChris Mason *backup_index = newest; 1897af31f5e5SChris Mason *num_backups_tried += 1; 1898af31f5e5SChris Mason } 1899af31f5e5SChris Mason root_backup = super->super_roots + newest; 1900af31f5e5SChris Mason 1901af31f5e5SChris Mason btrfs_set_super_generation(super, 1902af31f5e5SChris Mason btrfs_backup_tree_root_gen(root_backup)); 1903af31f5e5SChris Mason btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); 1904af31f5e5SChris Mason btrfs_set_super_root_level(super, 1905af31f5e5SChris Mason btrfs_backup_tree_root_level(root_backup)); 1906af31f5e5SChris Mason btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); 1907af31f5e5SChris Mason 1908af31f5e5SChris Mason /* 1909af31f5e5SChris Mason * fixme: the total bytes and num_devices need to match or we should 1910af31f5e5SChris Mason * need a fsck 1911af31f5e5SChris Mason */ 1912af31f5e5SChris Mason btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); 1913af31f5e5SChris Mason btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); 1914af31f5e5SChris Mason return 0; 1915af31f5e5SChris Mason } 1916af31f5e5SChris Mason 1917af31f5e5SChris Mason /* helper to cleanup tree roots */ 1918af31f5e5SChris Mason static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) 1919af31f5e5SChris Mason { 1920af31f5e5SChris Mason free_extent_buffer(info->tree_root->node); 1921af31f5e5SChris Mason free_extent_buffer(info->tree_root->commit_root); 1922af31f5e5SChris Mason free_extent_buffer(info->dev_root->node); 1923af31f5e5SChris Mason free_extent_buffer(info->dev_root->commit_root); 1924af31f5e5SChris Mason free_extent_buffer(info->extent_root->node); 1925af31f5e5SChris Mason free_extent_buffer(info->extent_root->commit_root); 1926af31f5e5SChris Mason free_extent_buffer(info->csum_root->node); 1927af31f5e5SChris Mason free_extent_buffer(info->csum_root->commit_root); 1928bcef60f2SArne Jansen if (info->quota_root) { 1929bcef60f2SArne Jansen free_extent_buffer(info->quota_root->node); 1930bcef60f2SArne Jansen free_extent_buffer(info->quota_root->commit_root); 1931bcef60f2SArne Jansen } 1932af31f5e5SChris Mason 1933af31f5e5SChris Mason info->tree_root->node = NULL; 1934af31f5e5SChris Mason info->tree_root->commit_root = NULL; 1935af31f5e5SChris Mason info->dev_root->node = NULL; 1936af31f5e5SChris Mason info->dev_root->commit_root = NULL; 1937af31f5e5SChris Mason info->extent_root->node = NULL; 1938af31f5e5SChris Mason info->extent_root->commit_root = NULL; 1939af31f5e5SChris Mason info->csum_root->node = NULL; 1940af31f5e5SChris Mason info->csum_root->commit_root = NULL; 1941bcef60f2SArne Jansen if (info->quota_root) { 1942bcef60f2SArne Jansen info->quota_root->node = NULL; 1943bcef60f2SArne Jansen info->quota_root->commit_root = NULL; 1944bcef60f2SArne Jansen } 1945af31f5e5SChris Mason 1946af31f5e5SChris Mason if (chunk_root) { 1947af31f5e5SChris Mason free_extent_buffer(info->chunk_root->node); 1948af31f5e5SChris Mason free_extent_buffer(info->chunk_root->commit_root); 1949af31f5e5SChris Mason info->chunk_root->node = NULL; 1950af31f5e5SChris Mason info->chunk_root->commit_root = NULL; 1951af31f5e5SChris Mason } 1952af31f5e5SChris Mason } 1953af31f5e5SChris Mason 1954af31f5e5SChris Mason 1955ad2b2c80SAl Viro int open_ctree(struct super_block *sb, 1956dfe25020SChris Mason struct btrfs_fs_devices *fs_devices, 1957dfe25020SChris Mason char *options) 1958eb60ceacSChris Mason { 1959db94535dSChris Mason u32 sectorsize; 1960db94535dSChris Mason u32 nodesize; 1961db94535dSChris Mason u32 leafsize; 1962db94535dSChris Mason u32 blocksize; 196387ee04ebSChris Mason u32 stripesize; 196484234f3aSYan Zheng u64 generation; 1965f2b636e8SJosef Bacik u64 features; 19663de4586cSChris Mason struct btrfs_key location; 1967a061fc8dSChris Mason struct buffer_head *bh; 19684d34b278SIlya Dryomov struct btrfs_super_block *disk_super; 1969815745cfSAl Viro struct btrfs_fs_info *fs_info = btrfs_sb(sb); 1970f84a8bd6SAl Viro struct btrfs_root *tree_root; 19714d34b278SIlya Dryomov struct btrfs_root *extent_root; 19724d34b278SIlya Dryomov struct btrfs_root *csum_root; 19734d34b278SIlya Dryomov struct btrfs_root *chunk_root; 19744d34b278SIlya Dryomov struct btrfs_root *dev_root; 1975bcef60f2SArne Jansen struct btrfs_root *quota_root; 1976e02119d5SChris Mason struct btrfs_root *log_tree_root; 1977eb60ceacSChris Mason int ret; 1978e58ca020SYan int err = -EINVAL; 1979af31f5e5SChris Mason int num_backups_tried = 0; 1980af31f5e5SChris Mason int backup_index = 0; 19814543df7eSChris Mason 1982f84a8bd6SAl Viro tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info); 19836f07e42eSAl Viro extent_root = fs_info->extent_root = btrfs_alloc_root(fs_info); 19846f07e42eSAl Viro csum_root = fs_info->csum_root = btrfs_alloc_root(fs_info); 19856f07e42eSAl Viro chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info); 19866f07e42eSAl Viro dev_root = fs_info->dev_root = btrfs_alloc_root(fs_info); 1987bcef60f2SArne Jansen quota_root = fs_info->quota_root = btrfs_alloc_root(fs_info); 19888790d502SChris Mason 1989f84a8bd6SAl Viro if (!tree_root || !extent_root || !csum_root || 1990bcef60f2SArne Jansen !chunk_root || !dev_root || !quota_root) { 199139279cc3SChris Mason err = -ENOMEM; 199239279cc3SChris Mason goto fail; 199339279cc3SChris Mason } 199476dda93cSYan, Zheng 199576dda93cSYan, Zheng ret = init_srcu_struct(&fs_info->subvol_srcu); 199676dda93cSYan, Zheng if (ret) { 199776dda93cSYan, Zheng err = ret; 199876dda93cSYan, Zheng goto fail; 199976dda93cSYan, Zheng } 200076dda93cSYan, Zheng 200176dda93cSYan, Zheng ret = setup_bdi(fs_info, &fs_info->bdi); 200276dda93cSYan, Zheng if (ret) { 200376dda93cSYan, Zheng err = ret; 200476dda93cSYan, Zheng goto fail_srcu; 200576dda93cSYan, Zheng } 200676dda93cSYan, Zheng 200776dda93cSYan, Zheng fs_info->btree_inode = new_inode(sb); 200876dda93cSYan, Zheng if (!fs_info->btree_inode) { 200976dda93cSYan, Zheng err = -ENOMEM; 201076dda93cSYan, Zheng goto fail_bdi; 201176dda93cSYan, Zheng } 201276dda93cSYan, Zheng 2013a6591715SChris Mason mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); 20141561dedaSMiao Xie 201576dda93cSYan, Zheng INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 20168fd17795SChris Mason INIT_LIST_HEAD(&fs_info->trans_list); 2017facda1e7SChris Mason INIT_LIST_HEAD(&fs_info->dead_roots); 201824bbcf04SYan, Zheng INIT_LIST_HEAD(&fs_info->delayed_iputs); 2019ea8c2819SChris Mason INIT_LIST_HEAD(&fs_info->delalloc_inodes); 20205a3f23d5SChris Mason INIT_LIST_HEAD(&fs_info->ordered_operations); 202111833d66SYan Zheng INIT_LIST_HEAD(&fs_info->caching_block_groups); 20221832a6d5SChris Mason spin_lock_init(&fs_info->delalloc_lock); 2023a4abeea4SJosef Bacik spin_lock_init(&fs_info->trans_lock); 202476dda93cSYan, Zheng spin_lock_init(&fs_info->fs_roots_radix_lock); 202524bbcf04SYan, Zheng spin_lock_init(&fs_info->delayed_iput_lock); 20264cb5300bSChris Mason spin_lock_init(&fs_info->defrag_inodes_lock); 20272bf64758SJosef Bacik spin_lock_init(&fs_info->free_chunk_lock); 2028f29021b2SJan Schmidt spin_lock_init(&fs_info->tree_mod_seq_lock); 2029f29021b2SJan Schmidt rwlock_init(&fs_info->tree_mod_log_lock); 20307585717fSChris Mason mutex_init(&fs_info->reloc_mutex); 203119c00ddcSChris Mason 203258176a96SJosef Bacik init_completion(&fs_info->kobj_unregister); 20330b86a832SChris Mason INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); 20346324fbf3SChris Mason INIT_LIST_HEAD(&fs_info->space_info); 2035f29021b2SJan Schmidt INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); 20360b86a832SChris Mason btrfs_mapping_init(&fs_info->mapping_tree); 203766d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->global_block_rsv, 203866d8f3ddSMiao Xie BTRFS_BLOCK_RSV_GLOBAL); 203966d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delalloc_block_rsv, 204066d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELALLOC); 204166d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); 204266d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); 204366d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); 204466d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delayed_block_rsv, 204566d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELOPS); 2046cb03c743SChris Mason atomic_set(&fs_info->nr_async_submits, 0); 2047771ed689SChris Mason atomic_set(&fs_info->async_delalloc_pages, 0); 20488c8bee1dSChris Mason atomic_set(&fs_info->async_submit_draining, 0); 20490986fe9eSChris Mason atomic_set(&fs_info->nr_async_bios, 0); 20504cb5300bSChris Mason atomic_set(&fs_info->defrag_running, 0); 2051f29021b2SJan Schmidt atomic_set(&fs_info->tree_mod_seq, 0); 2052e20d96d6SChris Mason fs_info->sb = sb; 20536f568d35SChris Mason fs_info->max_inline = 8192 * 1024; 20549ed74f2dSJosef Bacik fs_info->metadata_ratio = 0; 20554cb5300bSChris Mason fs_info->defrag_inodes = RB_ROOT; 2056a4abeea4SJosef Bacik fs_info->trans_no_join = 0; 20572bf64758SJosef Bacik fs_info->free_chunk_space = 0; 2058f29021b2SJan Schmidt fs_info->tree_mod_log = RB_ROOT; 2059c8b97818SChris Mason 206090519d66SArne Jansen /* readahead state */ 206190519d66SArne Jansen INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT); 206290519d66SArne Jansen spin_lock_init(&fs_info->reada_lock); 20632c90e5d6SChris Mason 2064b34b086cSChris Mason fs_info->thread_pool_size = min_t(unsigned long, 2065b34b086cSChris Mason num_online_cpus() + 2, 8); 20660afbaf8cSChris Mason 20673eaa2885SChris Mason INIT_LIST_HEAD(&fs_info->ordered_extents); 20683eaa2885SChris Mason spin_lock_init(&fs_info->ordered_extent_lock); 206916cdcec7SMiao Xie fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), 207016cdcec7SMiao Xie GFP_NOFS); 207116cdcec7SMiao Xie if (!fs_info->delayed_root) { 207216cdcec7SMiao Xie err = -ENOMEM; 207316cdcec7SMiao Xie goto fail_iput; 207416cdcec7SMiao Xie } 207516cdcec7SMiao Xie btrfs_init_delayed_root(fs_info->delayed_root); 20763eaa2885SChris Mason 2077a2de733cSArne Jansen mutex_init(&fs_info->scrub_lock); 2078a2de733cSArne Jansen atomic_set(&fs_info->scrubs_running, 0); 2079a2de733cSArne Jansen atomic_set(&fs_info->scrub_pause_req, 0); 2080a2de733cSArne Jansen atomic_set(&fs_info->scrubs_paused, 0); 2081a2de733cSArne Jansen atomic_set(&fs_info->scrub_cancel_req, 0); 2082a2de733cSArne Jansen init_waitqueue_head(&fs_info->scrub_pause_wait); 2083a2de733cSArne Jansen init_rwsem(&fs_info->scrub_super_lock); 2084a2de733cSArne Jansen fs_info->scrub_workers_refcnt = 0; 208521adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 208621adbd5cSStefan Behrens fs_info->check_integrity_print_mask = 0; 208721adbd5cSStefan Behrens #endif 2088a2de733cSArne Jansen 2089c9e9f97bSIlya Dryomov spin_lock_init(&fs_info->balance_lock); 2090c9e9f97bSIlya Dryomov mutex_init(&fs_info->balance_mutex); 2091837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_running, 0); 2092837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_pause_req, 0); 2093a7e99c69SIlya Dryomov atomic_set(&fs_info->balance_cancel_req, 0); 2094c9e9f97bSIlya Dryomov fs_info->balance_ctl = NULL; 2095837d5b6eSIlya Dryomov init_waitqueue_head(&fs_info->balance_wait_q); 2096a061fc8dSChris Mason 20970afbaf8cSChris Mason sb->s_blocksize = 4096; 20980afbaf8cSChris Mason sb->s_blocksize_bits = blksize_bits(4096); 209932a88aa1SJens Axboe sb->s_bdi = &fs_info->bdi; 21000afbaf8cSChris Mason 210176dda93cSYan, Zheng fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; 2102bfe86848SMiklos Szeredi set_nlink(fs_info->btree_inode, 1); 21030afbaf8cSChris Mason /* 21040afbaf8cSChris Mason * we set the i_size on the btree inode to the max possible int. 21050afbaf8cSChris Mason * the real end of the address space is determined by all of 21060afbaf8cSChris Mason * the devices in the system 21070afbaf8cSChris Mason */ 21080afbaf8cSChris Mason fs_info->btree_inode->i_size = OFFSET_MAX; 2109d98237b3SChris Mason fs_info->btree_inode->i_mapping->a_ops = &btree_aops; 211004160088SChris Mason fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; 211104160088SChris Mason 21125d4f98a2SYan Zheng RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); 2113d1310b2eSChris Mason extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, 2114f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 21150b32f4bbSJosef Bacik BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; 2116a8067e02SDavid Sterba extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); 21170da5468fSChris Mason 2118d1310b2eSChris Mason BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; 2119d1310b2eSChris Mason 21200f7d52f4SChris Mason BTRFS_I(fs_info->btree_inode)->root = tree_root; 21210f7d52f4SChris Mason memset(&BTRFS_I(fs_info->btree_inode)->location, 0, 21220f7d52f4SChris Mason sizeof(struct btrfs_key)); 212372ac3c0dSJosef Bacik set_bit(BTRFS_INODE_DUMMY, 212472ac3c0dSJosef Bacik &BTRFS_I(fs_info->btree_inode)->runtime_flags); 212522b0ebdaSChris Mason insert_inode_hash(fs_info->btree_inode); 212639279cc3SChris Mason 2127e02119d5SChris Mason spin_lock_init(&fs_info->block_group_cache_lock); 21286bef4d31SEric Paris fs_info->block_group_cache_tree = RB_ROOT; 2129925baeddSChris Mason 213011833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[0], 2131f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 213211833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[1], 2133f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 213411833d66SYan Zheng fs_info->pinned_extents = &fs_info->freed_extents[0]; 2135e6dcd2dcSChris Mason fs_info->do_barriers = 1; 2136f9295749SChris Mason 2137d98237b3SChris Mason 21385a3f23d5SChris Mason mutex_init(&fs_info->ordered_operations_mutex); 213930ae8467SChris Mason mutex_init(&fs_info->tree_log_mutex); 2140925baeddSChris Mason mutex_init(&fs_info->chunk_mutex); 2141925baeddSChris Mason mutex_init(&fs_info->transaction_kthread_mutex); 2142a74a4b97SChris Mason mutex_init(&fs_info->cleaner_mutex); 2143a74a4b97SChris Mason mutex_init(&fs_info->volume_mutex); 2144276e680dSYan Zheng init_rwsem(&fs_info->extent_commit_sem); 2145c71bf099SYan, Zheng init_rwsem(&fs_info->cleanup_work_sem); 214676dda93cSYan, Zheng init_rwsem(&fs_info->subvol_sem); 2147e922e087SStefan Behrens fs_info->dev_replace.lock_owner = 0; 2148e922e087SStefan Behrens atomic_set(&fs_info->dev_replace.nesting_level, 0); 2149e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); 2150e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock_management_lock); 2151e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock); 2152fa9c0d79SChris Mason 2153416ac51dSArne Jansen spin_lock_init(&fs_info->qgroup_lock); 2154416ac51dSArne Jansen fs_info->qgroup_tree = RB_ROOT; 2155416ac51dSArne Jansen INIT_LIST_HEAD(&fs_info->dirty_qgroups); 2156416ac51dSArne Jansen fs_info->qgroup_seq = 1; 2157416ac51dSArne Jansen fs_info->quota_enabled = 0; 2158416ac51dSArne Jansen fs_info->pending_quota_state = 0; 2159416ac51dSArne Jansen 2160fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); 2161fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->data_alloc_cluster); 2162fa9c0d79SChris Mason 21637d9eb12cSChris Mason init_waitqueue_head(&fs_info->transaction_throttle); 21643768f368SChris Mason init_waitqueue_head(&fs_info->transaction_wait); 2165bb9c12c9SSage Weil init_waitqueue_head(&fs_info->transaction_blocked_wait); 21664854ddd0SChris Mason init_waitqueue_head(&fs_info->async_submit_wait); 21679a8dd150SChris Mason 21680b86a832SChris Mason __setup_root(4096, 4096, 4096, 4096, tree_root, 21692c90e5d6SChris Mason fs_info, BTRFS_ROOT_TREE_OBJECTID); 21707eccb903SChris Mason 21713c4bb26bSChris Mason invalidate_bdev(fs_devices->latest_bdev); 2172a512bbf8SYan Zheng bh = btrfs_read_dev_super(fs_devices->latest_bdev); 217320b45077SDave Young if (!bh) { 217420b45077SDave Young err = -EINVAL; 217516cdcec7SMiao Xie goto fail_alloc; 217620b45077SDave Young } 217739279cc3SChris Mason 21786c41761fSDavid Sterba memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); 21796c41761fSDavid Sterba memcpy(fs_info->super_for_commit, fs_info->super_copy, 21806c41761fSDavid Sterba sizeof(*fs_info->super_for_commit)); 2181a061fc8dSChris Mason brelse(bh); 21825f39d397SChris Mason 21836c41761fSDavid Sterba memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); 21840b86a832SChris Mason 21856c41761fSDavid Sterba disk_super = fs_info->super_copy; 21860f7d52f4SChris Mason if (!btrfs_super_root(disk_super)) 218716cdcec7SMiao Xie goto fail_alloc; 21880f7d52f4SChris Mason 2189acce952bSliubo /* check FS state, whether FS is broken. */ 2190acce952bSliubo fs_info->fs_state |= btrfs_super_flags(disk_super); 2191acce952bSliubo 2192fcd1f065SDavid Sterba ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); 2193fcd1f065SDavid Sterba if (ret) { 2194fcd1f065SDavid Sterba printk(KERN_ERR "btrfs: superblock contains fatal errors\n"); 2195fcd1f065SDavid Sterba err = ret; 2196fcd1f065SDavid Sterba goto fail_alloc; 2197fcd1f065SDavid Sterba } 2198acce952bSliubo 219975e7cb7fSLiu Bo /* 2200af31f5e5SChris Mason * run through our array of backup supers and setup 2201af31f5e5SChris Mason * our ring pointer to the oldest one 2202af31f5e5SChris Mason */ 2203af31f5e5SChris Mason generation = btrfs_super_generation(disk_super); 2204af31f5e5SChris Mason find_oldest_super_backup(fs_info, generation); 2205af31f5e5SChris Mason 2206af31f5e5SChris Mason /* 220775e7cb7fSLiu Bo * In the long term, we'll store the compression type in the super 220875e7cb7fSLiu Bo * block, and it'll be used for per file compression control. 220975e7cb7fSLiu Bo */ 221075e7cb7fSLiu Bo fs_info->compress_type = BTRFS_COMPRESS_ZLIB; 221175e7cb7fSLiu Bo 22122b82032cSYan Zheng ret = btrfs_parse_options(tree_root, options); 22132b82032cSYan Zheng if (ret) { 22142b82032cSYan Zheng err = ret; 221516cdcec7SMiao Xie goto fail_alloc; 22162b82032cSYan Zheng } 2217dfe25020SChris Mason 2218f2b636e8SJosef Bacik features = btrfs_super_incompat_flags(disk_super) & 2219f2b636e8SJosef Bacik ~BTRFS_FEATURE_INCOMPAT_SUPP; 2220f2b636e8SJosef Bacik if (features) { 2221f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount because of " 2222f2b636e8SJosef Bacik "unsupported optional features (%Lx).\n", 222321380931SJoel Becker (unsigned long long)features); 2224f2b636e8SJosef Bacik err = -EINVAL; 222516cdcec7SMiao Xie goto fail_alloc; 2226f2b636e8SJosef Bacik } 2227f2b636e8SJosef Bacik 2228727011e0SChris Mason if (btrfs_super_leafsize(disk_super) != 2229727011e0SChris Mason btrfs_super_nodesize(disk_super)) { 2230727011e0SChris Mason printk(KERN_ERR "BTRFS: couldn't mount because metadata " 2231727011e0SChris Mason "blocksizes don't match. node %d leaf %d\n", 2232727011e0SChris Mason btrfs_super_nodesize(disk_super), 2233727011e0SChris Mason btrfs_super_leafsize(disk_super)); 2234727011e0SChris Mason err = -EINVAL; 2235727011e0SChris Mason goto fail_alloc; 2236727011e0SChris Mason } 2237727011e0SChris Mason if (btrfs_super_leafsize(disk_super) > BTRFS_MAX_METADATA_BLOCKSIZE) { 2238727011e0SChris Mason printk(KERN_ERR "BTRFS: couldn't mount because metadata " 2239727011e0SChris Mason "blocksize (%d) was too large\n", 2240727011e0SChris Mason btrfs_super_leafsize(disk_super)); 2241727011e0SChris Mason err = -EINVAL; 2242727011e0SChris Mason goto fail_alloc; 2243727011e0SChris Mason } 2244727011e0SChris Mason 22455d4f98a2SYan Zheng features = btrfs_super_incompat_flags(disk_super); 22465d4f98a2SYan Zheng features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; 224769e380d1SLi Zefan if (tree_root->fs_info->compress_type == BTRFS_COMPRESS_LZO) 2248a6fa6faeSLi Zefan features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; 2249727011e0SChris Mason 2250727011e0SChris Mason /* 2251727011e0SChris Mason * flag our filesystem as having big metadata blocks if 2252727011e0SChris Mason * they are bigger than the page size 2253727011e0SChris Mason */ 2254727011e0SChris Mason if (btrfs_super_leafsize(disk_super) > PAGE_CACHE_SIZE) { 2255727011e0SChris Mason if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) 2256727011e0SChris Mason printk(KERN_INFO "btrfs flagging fs with big metadata feature\n"); 2257727011e0SChris Mason features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; 2258727011e0SChris Mason } 2259727011e0SChris Mason 2260bc3f116fSChris Mason nodesize = btrfs_super_nodesize(disk_super); 2261bc3f116fSChris Mason leafsize = btrfs_super_leafsize(disk_super); 2262bc3f116fSChris Mason sectorsize = btrfs_super_sectorsize(disk_super); 2263bc3f116fSChris Mason stripesize = btrfs_super_stripesize(disk_super); 2264bc3f116fSChris Mason 2265bc3f116fSChris Mason /* 2266bc3f116fSChris Mason * mixed block groups end up with duplicate but slightly offset 2267bc3f116fSChris Mason * extent buffers for the same range. It leads to corruptions 2268bc3f116fSChris Mason */ 2269bc3f116fSChris Mason if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && 2270bc3f116fSChris Mason (sectorsize != leafsize)) { 2271bc3f116fSChris Mason printk(KERN_WARNING "btrfs: unequal leaf/node/sector sizes " 2272bc3f116fSChris Mason "are not allowed for mixed block groups on %s\n", 2273bc3f116fSChris Mason sb->s_id); 2274bc3f116fSChris Mason goto fail_alloc; 2275bc3f116fSChris Mason } 2276bc3f116fSChris Mason 22775d4f98a2SYan Zheng btrfs_set_super_incompat_flags(disk_super, features); 22785d4f98a2SYan Zheng 2279f2b636e8SJosef Bacik features = btrfs_super_compat_ro_flags(disk_super) & 2280f2b636e8SJosef Bacik ~BTRFS_FEATURE_COMPAT_RO_SUPP; 2281f2b636e8SJosef Bacik if (!(sb->s_flags & MS_RDONLY) && features) { 2282f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount RDWR because of " 2283f2b636e8SJosef Bacik "unsupported option features (%Lx).\n", 228421380931SJoel Becker (unsigned long long)features); 2285f2b636e8SJosef Bacik err = -EINVAL; 228616cdcec7SMiao Xie goto fail_alloc; 2287f2b636e8SJosef Bacik } 228861d92c32SChris Mason 228961d92c32SChris Mason btrfs_init_workers(&fs_info->generic_worker, 229061d92c32SChris Mason "genwork", 1, NULL); 229161d92c32SChris Mason 22925443be45SChris Mason btrfs_init_workers(&fs_info->workers, "worker", 229361d92c32SChris Mason fs_info->thread_pool_size, 229461d92c32SChris Mason &fs_info->generic_worker); 2295c8b97818SChris Mason 2296771ed689SChris Mason btrfs_init_workers(&fs_info->delalloc_workers, "delalloc", 229761d92c32SChris Mason fs_info->thread_pool_size, 229861d92c32SChris Mason &fs_info->generic_worker); 2299771ed689SChris Mason 23008ccf6f19SMiao Xie btrfs_init_workers(&fs_info->flush_workers, "flush_delalloc", 23018ccf6f19SMiao Xie fs_info->thread_pool_size, 23028ccf6f19SMiao Xie &fs_info->generic_worker); 23038ccf6f19SMiao Xie 23045443be45SChris Mason btrfs_init_workers(&fs_info->submit_workers, "submit", 2305b720d209SChris Mason min_t(u64, fs_devices->num_devices, 230661d92c32SChris Mason fs_info->thread_pool_size), 230761d92c32SChris Mason &fs_info->generic_worker); 230861b49440SChris Mason 2309bab39bf9SJosef Bacik btrfs_init_workers(&fs_info->caching_workers, "cache", 2310bab39bf9SJosef Bacik 2, &fs_info->generic_worker); 2311bab39bf9SJosef Bacik 231261b49440SChris Mason /* a higher idle thresh on the submit workers makes it much more 231361b49440SChris Mason * likely that bios will be send down in a sane order to the 231461b49440SChris Mason * devices 231561b49440SChris Mason */ 231661b49440SChris Mason fs_info->submit_workers.idle_thresh = 64; 231753863232SChris Mason 2318771ed689SChris Mason fs_info->workers.idle_thresh = 16; 23194a69a410SChris Mason fs_info->workers.ordered = 1; 232061b49440SChris Mason 2321771ed689SChris Mason fs_info->delalloc_workers.idle_thresh = 2; 2322771ed689SChris Mason fs_info->delalloc_workers.ordered = 1; 2323771ed689SChris Mason 232461d92c32SChris Mason btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1, 232561d92c32SChris Mason &fs_info->generic_worker); 23265443be45SChris Mason btrfs_init_workers(&fs_info->endio_workers, "endio", 232761d92c32SChris Mason fs_info->thread_pool_size, 232861d92c32SChris Mason &fs_info->generic_worker); 2329d20f7043SChris Mason btrfs_init_workers(&fs_info->endio_meta_workers, "endio-meta", 233061d92c32SChris Mason fs_info->thread_pool_size, 233161d92c32SChris Mason &fs_info->generic_worker); 2332cad321adSChris Mason btrfs_init_workers(&fs_info->endio_meta_write_workers, 233361d92c32SChris Mason "endio-meta-write", fs_info->thread_pool_size, 233461d92c32SChris Mason &fs_info->generic_worker); 23355443be45SChris Mason btrfs_init_workers(&fs_info->endio_write_workers, "endio-write", 233661d92c32SChris Mason fs_info->thread_pool_size, 233761d92c32SChris Mason &fs_info->generic_worker); 23380cb59c99SJosef Bacik btrfs_init_workers(&fs_info->endio_freespace_worker, "freespace-write", 23390cb59c99SJosef Bacik 1, &fs_info->generic_worker); 234016cdcec7SMiao Xie btrfs_init_workers(&fs_info->delayed_workers, "delayed-meta", 234116cdcec7SMiao Xie fs_info->thread_pool_size, 234216cdcec7SMiao Xie &fs_info->generic_worker); 234390519d66SArne Jansen btrfs_init_workers(&fs_info->readahead_workers, "readahead", 234490519d66SArne Jansen fs_info->thread_pool_size, 234590519d66SArne Jansen &fs_info->generic_worker); 234661b49440SChris Mason 234761b49440SChris Mason /* 234861b49440SChris Mason * endios are largely parallel and should have a very 234961b49440SChris Mason * low idle thresh 235061b49440SChris Mason */ 235161b49440SChris Mason fs_info->endio_workers.idle_thresh = 4; 2352b51912c9SChris Mason fs_info->endio_meta_workers.idle_thresh = 4; 2353b51912c9SChris Mason 23549042846bSChris Mason fs_info->endio_write_workers.idle_thresh = 2; 23559042846bSChris Mason fs_info->endio_meta_write_workers.idle_thresh = 2; 235690519d66SArne Jansen fs_info->readahead_workers.idle_thresh = 2; 23579042846bSChris Mason 23580dc3b84aSJosef Bacik /* 23590dc3b84aSJosef Bacik * btrfs_start_workers can really only fail because of ENOMEM so just 23600dc3b84aSJosef Bacik * return -ENOMEM if any of these fail. 23610dc3b84aSJosef Bacik */ 23620dc3b84aSJosef Bacik ret = btrfs_start_workers(&fs_info->workers); 23630dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->generic_worker); 23640dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->submit_workers); 23650dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delalloc_workers); 23660dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->fixup_workers); 23670dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_workers); 23680dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_workers); 23690dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_write_workers); 23700dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_write_workers); 23710dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_freespace_worker); 23720dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delayed_workers); 23730dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->caching_workers); 23740dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->readahead_workers); 23758ccf6f19SMiao Xie ret |= btrfs_start_workers(&fs_info->flush_workers); 23760dc3b84aSJosef Bacik if (ret) { 2377fed425c7SIlya Dryomov err = -ENOMEM; 23780dc3b84aSJosef Bacik goto fail_sb_buffer; 23790dc3b84aSJosef Bacik } 23804543df7eSChris Mason 23814575c9ccSChris Mason fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); 2382c8b97818SChris Mason fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, 2383c8b97818SChris Mason 4 * 1024 * 1024 / PAGE_CACHE_SIZE); 23844575c9ccSChris Mason 2385db94535dSChris Mason tree_root->nodesize = nodesize; 2386db94535dSChris Mason tree_root->leafsize = leafsize; 2387db94535dSChris Mason tree_root->sectorsize = sectorsize; 238887ee04ebSChris Mason tree_root->stripesize = stripesize; 2389a061fc8dSChris Mason 2390a061fc8dSChris Mason sb->s_blocksize = sectorsize; 2391a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(sectorsize); 2392db94535dSChris Mason 239339279cc3SChris Mason if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC, 239439279cc3SChris Mason sizeof(disk_super->magic))) { 2395d397712bSChris Mason printk(KERN_INFO "btrfs: valid FS not found on %s\n", sb->s_id); 239639279cc3SChris Mason goto fail_sb_buffer; 239739279cc3SChris Mason } 239819c00ddcSChris Mason 23998d082fb7SLiu Bo if (sectorsize != PAGE_SIZE) { 24008d082fb7SLiu Bo printk(KERN_WARNING "btrfs: Incompatible sector size(%lu) " 24018d082fb7SLiu Bo "found on %s\n", (unsigned long)sectorsize, sb->s_id); 2402941b2ddfSKeith Mannthey goto fail_sb_buffer; 2403941b2ddfSKeith Mannthey } 2404941b2ddfSKeith Mannthey 2405925baeddSChris Mason mutex_lock(&fs_info->chunk_mutex); 2406e4404d6eSYan Zheng ret = btrfs_read_sys_array(tree_root); 2407925baeddSChris Mason mutex_unlock(&fs_info->chunk_mutex); 240884eed90fSChris Mason if (ret) { 2409d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read the system " 2410d397712bSChris Mason "array on %s\n", sb->s_id); 24115d4f98a2SYan Zheng goto fail_sb_buffer; 241284eed90fSChris Mason } 24130b86a832SChris Mason 24140b86a832SChris Mason blocksize = btrfs_level_size(tree_root, 24150b86a832SChris Mason btrfs_super_chunk_root_level(disk_super)); 241684234f3aSYan Zheng generation = btrfs_super_chunk_root_generation(disk_super); 24170b86a832SChris Mason 24180b86a832SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 24190b86a832SChris Mason chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); 24200b86a832SChris Mason 24210b86a832SChris Mason chunk_root->node = read_tree_block(chunk_root, 24220b86a832SChris Mason btrfs_super_chunk_root(disk_super), 242384234f3aSYan Zheng blocksize, generation); 242479787eaaSJeff Mahoney BUG_ON(!chunk_root->node); /* -ENOMEM */ 242583121942SDavid Woodhouse if (!test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { 242683121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n", 242783121942SDavid Woodhouse sb->s_id); 2428af31f5e5SChris Mason goto fail_tree_roots; 242983121942SDavid Woodhouse } 24305d4f98a2SYan Zheng btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); 24315d4f98a2SYan Zheng chunk_root->commit_root = btrfs_root_node(chunk_root); 24320b86a832SChris Mason 2433e17cade2SChris Mason read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, 2434e17cade2SChris Mason (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node), 2435e17cade2SChris Mason BTRFS_UUID_SIZE); 2436e17cade2SChris Mason 24370b86a832SChris Mason ret = btrfs_read_chunk_tree(chunk_root); 24382b82032cSYan Zheng if (ret) { 2439d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read chunk tree on %s\n", 2440d397712bSChris Mason sb->s_id); 2441af31f5e5SChris Mason goto fail_tree_roots; 24422b82032cSYan Zheng } 24430b86a832SChris Mason 24448dabb742SStefan Behrens /* 24458dabb742SStefan Behrens * keep the device that is marked to be the target device for the 24468dabb742SStefan Behrens * dev_replace procedure 24478dabb742SStefan Behrens */ 24488dabb742SStefan Behrens btrfs_close_extra_devices(fs_info, fs_devices, 0); 2449dfe25020SChris Mason 2450a6b0d5c8SChris Mason if (!fs_devices->latest_bdev) { 2451a6b0d5c8SChris Mason printk(KERN_CRIT "btrfs: failed to read devices on %s\n", 2452a6b0d5c8SChris Mason sb->s_id); 2453a6b0d5c8SChris Mason goto fail_tree_roots; 2454a6b0d5c8SChris Mason } 2455a6b0d5c8SChris Mason 2456af31f5e5SChris Mason retry_root_backup: 2457db94535dSChris Mason blocksize = btrfs_level_size(tree_root, 2458db94535dSChris Mason btrfs_super_root_level(disk_super)); 245984234f3aSYan Zheng generation = btrfs_super_generation(disk_super); 24600b86a832SChris Mason 2461e20d96d6SChris Mason tree_root->node = read_tree_block(tree_root, 2462db94535dSChris Mason btrfs_super_root(disk_super), 246384234f3aSYan Zheng blocksize, generation); 2464af31f5e5SChris Mason if (!tree_root->node || 2465af31f5e5SChris Mason !test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) { 246683121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read tree root on %s\n", 246783121942SDavid Woodhouse sb->s_id); 2468af31f5e5SChris Mason 2469af31f5e5SChris Mason goto recovery_tree_root; 247083121942SDavid Woodhouse } 2471af31f5e5SChris Mason 24725d4f98a2SYan Zheng btrfs_set_root_node(&tree_root->root_item, tree_root->node); 24735d4f98a2SYan Zheng tree_root->commit_root = btrfs_root_node(tree_root); 2474db94535dSChris Mason 2475db94535dSChris Mason ret = find_and_setup_root(tree_root, fs_info, 2476e20d96d6SChris Mason BTRFS_EXTENT_TREE_OBJECTID, extent_root); 24770b86a832SChris Mason if (ret) 2478af31f5e5SChris Mason goto recovery_tree_root; 24790b86a832SChris Mason extent_root->track_dirty = 1; 24800b86a832SChris Mason 24810b86a832SChris Mason ret = find_and_setup_root(tree_root, fs_info, 24820b86a832SChris Mason BTRFS_DEV_TREE_OBJECTID, dev_root); 24830b86a832SChris Mason if (ret) 2484af31f5e5SChris Mason goto recovery_tree_root; 24855d4f98a2SYan Zheng dev_root->track_dirty = 1; 24863768f368SChris Mason 2487d20f7043SChris Mason ret = find_and_setup_root(tree_root, fs_info, 2488d20f7043SChris Mason BTRFS_CSUM_TREE_OBJECTID, csum_root); 2489d20f7043SChris Mason if (ret) 2490af31f5e5SChris Mason goto recovery_tree_root; 2491d20f7043SChris Mason csum_root->track_dirty = 1; 2492d20f7043SChris Mason 2493bcef60f2SArne Jansen ret = find_and_setup_root(tree_root, fs_info, 2494bcef60f2SArne Jansen BTRFS_QUOTA_TREE_OBJECTID, quota_root); 2495bcef60f2SArne Jansen if (ret) { 2496bcef60f2SArne Jansen kfree(quota_root); 2497bcef60f2SArne Jansen quota_root = fs_info->quota_root = NULL; 2498bcef60f2SArne Jansen } else { 2499bcef60f2SArne Jansen quota_root->track_dirty = 1; 2500bcef60f2SArne Jansen fs_info->quota_enabled = 1; 2501bcef60f2SArne Jansen fs_info->pending_quota_state = 1; 2502bcef60f2SArne Jansen } 2503bcef60f2SArne Jansen 25048929ecfaSYan, Zheng fs_info->generation = generation; 25058929ecfaSYan, Zheng fs_info->last_trans_committed = generation; 25068929ecfaSYan, Zheng 250768310a5eSIlya Dryomov ret = btrfs_recover_balance(fs_info); 250868310a5eSIlya Dryomov if (ret) { 250968310a5eSIlya Dryomov printk(KERN_WARNING "btrfs: failed to recover balance\n"); 251068310a5eSIlya Dryomov goto fail_block_groups; 251168310a5eSIlya Dryomov } 251268310a5eSIlya Dryomov 2513733f4fbbSStefan Behrens ret = btrfs_init_dev_stats(fs_info); 2514733f4fbbSStefan Behrens if (ret) { 2515733f4fbbSStefan Behrens printk(KERN_ERR "btrfs: failed to init dev_stats: %d\n", 2516733f4fbbSStefan Behrens ret); 2517733f4fbbSStefan Behrens goto fail_block_groups; 2518733f4fbbSStefan Behrens } 2519733f4fbbSStefan Behrens 25208dabb742SStefan Behrens ret = btrfs_init_dev_replace(fs_info); 25218dabb742SStefan Behrens if (ret) { 25228dabb742SStefan Behrens pr_err("btrfs: failed to init dev_replace: %d\n", ret); 25238dabb742SStefan Behrens goto fail_block_groups; 25248dabb742SStefan Behrens } 25258dabb742SStefan Behrens 25268dabb742SStefan Behrens btrfs_close_extra_devices(fs_info, fs_devices, 1); 25278dabb742SStefan Behrens 2528c59021f8Sliubo ret = btrfs_init_space_info(fs_info); 2529c59021f8Sliubo if (ret) { 2530c59021f8Sliubo printk(KERN_ERR "Failed to initial space info: %d\n", ret); 2531c59021f8Sliubo goto fail_block_groups; 2532c59021f8Sliubo } 2533c59021f8Sliubo 25341b1d1f66SJosef Bacik ret = btrfs_read_block_groups(extent_root); 25351b1d1f66SJosef Bacik if (ret) { 25361b1d1f66SJosef Bacik printk(KERN_ERR "Failed to read block groups: %d\n", ret); 25371b1d1f66SJosef Bacik goto fail_block_groups; 25381b1d1f66SJosef Bacik } 25395af3e8ccSStefan Behrens fs_info->num_tolerated_disk_barrier_failures = 25405af3e8ccSStefan Behrens btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); 2541292fd7fcSStefan Behrens if (fs_info->fs_devices->missing_devices > 2542292fd7fcSStefan Behrens fs_info->num_tolerated_disk_barrier_failures && 2543292fd7fcSStefan Behrens !(sb->s_flags & MS_RDONLY)) { 2544292fd7fcSStefan Behrens printk(KERN_WARNING 2545292fd7fcSStefan Behrens "Btrfs: too many missing devices, writeable mount is not allowed\n"); 2546292fd7fcSStefan Behrens goto fail_block_groups; 2547292fd7fcSStefan Behrens } 25489078a3e1SChris Mason 2549a74a4b97SChris Mason fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 2550a74a4b97SChris Mason "btrfs-cleaner"); 255157506d50SQinghuang Feng if (IS_ERR(fs_info->cleaner_kthread)) 25521b1d1f66SJosef Bacik goto fail_block_groups; 2553a74a4b97SChris Mason 2554a74a4b97SChris Mason fs_info->transaction_kthread = kthread_run(transaction_kthread, 2555a74a4b97SChris Mason tree_root, 2556a74a4b97SChris Mason "btrfs-transaction"); 255757506d50SQinghuang Feng if (IS_ERR(fs_info->transaction_kthread)) 25583f157a2fSChris Mason goto fail_cleaner; 2559a74a4b97SChris Mason 2560c289811cSChris Mason if (!btrfs_test_opt(tree_root, SSD) && 2561c289811cSChris Mason !btrfs_test_opt(tree_root, NOSSD) && 2562c289811cSChris Mason !fs_info->fs_devices->rotating) { 2563c289811cSChris Mason printk(KERN_INFO "Btrfs detected SSD devices, enabling SSD " 2564c289811cSChris Mason "mode\n"); 2565c289811cSChris Mason btrfs_set_opt(fs_info->mount_opt, SSD); 2566c289811cSChris Mason } 2567c289811cSChris Mason 256821adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 256921adbd5cSStefan Behrens if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { 257021adbd5cSStefan Behrens ret = btrfsic_mount(tree_root, fs_devices, 257121adbd5cSStefan Behrens btrfs_test_opt(tree_root, 257221adbd5cSStefan Behrens CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? 257321adbd5cSStefan Behrens 1 : 0, 257421adbd5cSStefan Behrens fs_info->check_integrity_print_mask); 257521adbd5cSStefan Behrens if (ret) 257621adbd5cSStefan Behrens printk(KERN_WARNING "btrfs: failed to initialize" 257721adbd5cSStefan Behrens " integrity check module %s\n", sb->s_id); 257821adbd5cSStefan Behrens } 257921adbd5cSStefan Behrens #endif 2580bcef60f2SArne Jansen ret = btrfs_read_qgroup_config(fs_info); 2581bcef60f2SArne Jansen if (ret) 2582bcef60f2SArne Jansen goto fail_trans_kthread; 258321adbd5cSStefan Behrens 2584acce952bSliubo /* do not make disk changes in broken FS */ 258568ce9682SStefan Behrens if (btrfs_super_log_root(disk_super) != 0) { 2586e02119d5SChris Mason u64 bytenr = btrfs_super_log_root(disk_super); 2587d18a2c44SChris Mason 25887c2ca468SChris Mason if (fs_devices->rw_devices == 0) { 2589d397712bSChris Mason printk(KERN_WARNING "Btrfs log replay required " 2590d397712bSChris Mason "on RO media\n"); 25917c2ca468SChris Mason err = -EIO; 2592bcef60f2SArne Jansen goto fail_qgroup; 25937c2ca468SChris Mason } 2594e02119d5SChris Mason blocksize = 2595e02119d5SChris Mason btrfs_level_size(tree_root, 2596e02119d5SChris Mason btrfs_super_log_root_level(disk_super)); 2597e02119d5SChris Mason 25986f07e42eSAl Viro log_tree_root = btrfs_alloc_root(fs_info); 2599676e4c86SDan Carpenter if (!log_tree_root) { 2600676e4c86SDan Carpenter err = -ENOMEM; 2601bcef60f2SArne Jansen goto fail_qgroup; 2602676e4c86SDan Carpenter } 2603e02119d5SChris Mason 2604e02119d5SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 2605e02119d5SChris Mason log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); 2606e02119d5SChris Mason 2607e02119d5SChris Mason log_tree_root->node = read_tree_block(tree_root, bytenr, 260884234f3aSYan Zheng blocksize, 260984234f3aSYan Zheng generation + 1); 261079787eaaSJeff Mahoney /* returns with log_tree_root freed on success */ 2611e02119d5SChris Mason ret = btrfs_recover_log_trees(log_tree_root); 261279787eaaSJeff Mahoney if (ret) { 261379787eaaSJeff Mahoney btrfs_error(tree_root->fs_info, ret, 261479787eaaSJeff Mahoney "Failed to recover log tree"); 261579787eaaSJeff Mahoney free_extent_buffer(log_tree_root->node); 261679787eaaSJeff Mahoney kfree(log_tree_root); 261779787eaaSJeff Mahoney goto fail_trans_kthread; 261879787eaaSJeff Mahoney } 2619e556ce2cSYan Zheng 2620e556ce2cSYan Zheng if (sb->s_flags & MS_RDONLY) { 2621e556ce2cSYan Zheng ret = btrfs_commit_super(tree_root); 262279787eaaSJeff Mahoney if (ret) 262379787eaaSJeff Mahoney goto fail_trans_kthread; 2624e556ce2cSYan Zheng } 2625e02119d5SChris Mason } 26261a40e23bSZheng Yan 262776dda93cSYan, Zheng ret = btrfs_find_orphan_roots(tree_root); 262879787eaaSJeff Mahoney if (ret) 262979787eaaSJeff Mahoney goto fail_trans_kthread; 263076dda93cSYan, Zheng 26317c2ca468SChris Mason if (!(sb->s_flags & MS_RDONLY)) { 2632d68fc57bSYan, Zheng ret = btrfs_cleanup_fs_roots(fs_info); 263344c44af2SIlya Dryomov if (ret) 263444c44af2SIlya Dryomov goto fail_trans_kthread; 2635d68fc57bSYan, Zheng 26365d4f98a2SYan Zheng ret = btrfs_recover_relocation(tree_root); 2637d7ce5843SMiao Xie if (ret < 0) { 2638d7ce5843SMiao Xie printk(KERN_WARNING 2639d7ce5843SMiao Xie "btrfs: failed to recover relocation\n"); 2640d7ce5843SMiao Xie err = -EINVAL; 2641bcef60f2SArne Jansen goto fail_qgroup; 2642d7ce5843SMiao Xie } 26437c2ca468SChris Mason } 26441a40e23bSZheng Yan 26453de4586cSChris Mason location.objectid = BTRFS_FS_TREE_OBJECTID; 26463de4586cSChris Mason location.type = BTRFS_ROOT_ITEM_KEY; 26473de4586cSChris Mason location.offset = (u64)-1; 26483de4586cSChris Mason 26493de4586cSChris Mason fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); 26503de4586cSChris Mason if (!fs_info->fs_root) 2651bcef60f2SArne Jansen goto fail_qgroup; 26523140c9a3SDan Carpenter if (IS_ERR(fs_info->fs_root)) { 26533140c9a3SDan Carpenter err = PTR_ERR(fs_info->fs_root); 2654bcef60f2SArne Jansen goto fail_qgroup; 26553140c9a3SDan Carpenter } 2656c289811cSChris Mason 26572b6ba629SIlya Dryomov if (sb->s_flags & MS_RDONLY) 26582b6ba629SIlya Dryomov return 0; 26592b6ba629SIlya Dryomov 2660e3acc2a6SJosef Bacik down_read(&fs_info->cleanup_work_sem); 26612b6ba629SIlya Dryomov if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || 26622b6ba629SIlya Dryomov (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { 26632b6ba629SIlya Dryomov up_read(&fs_info->cleanup_work_sem); 26642b6ba629SIlya Dryomov close_ctree(tree_root); 26652b6ba629SIlya Dryomov return ret; 26662b6ba629SIlya Dryomov } 2667e3acc2a6SJosef Bacik up_read(&fs_info->cleanup_work_sem); 266859641015SIlya Dryomov 26692b6ba629SIlya Dryomov ret = btrfs_resume_balance_async(fs_info); 26702b6ba629SIlya Dryomov if (ret) { 26712b6ba629SIlya Dryomov printk(KERN_WARNING "btrfs: failed to resume balance\n"); 267266b4ffd1SJosef Bacik close_ctree(tree_root); 26732b6ba629SIlya Dryomov return ret; 2674e3acc2a6SJosef Bacik } 2675e3acc2a6SJosef Bacik 26768dabb742SStefan Behrens ret = btrfs_resume_dev_replace_async(fs_info); 26778dabb742SStefan Behrens if (ret) { 26788dabb742SStefan Behrens pr_warn("btrfs: failed to resume dev_replace\n"); 26798dabb742SStefan Behrens close_ctree(tree_root); 26808dabb742SStefan Behrens return ret; 26818dabb742SStefan Behrens } 26828dabb742SStefan Behrens 2683ad2b2c80SAl Viro return 0; 268439279cc3SChris Mason 2685bcef60f2SArne Jansen fail_qgroup: 2686bcef60f2SArne Jansen btrfs_free_qgroup_config(fs_info); 26877c2ca468SChris Mason fail_trans_kthread: 26887c2ca468SChris Mason kthread_stop(fs_info->transaction_kthread); 26893f157a2fSChris Mason fail_cleaner: 2690a74a4b97SChris Mason kthread_stop(fs_info->cleaner_kthread); 26917c2ca468SChris Mason 26927c2ca468SChris Mason /* 26937c2ca468SChris Mason * make sure we're done with the btree inode before we stop our 26947c2ca468SChris Mason * kthreads 26957c2ca468SChris Mason */ 26967c2ca468SChris Mason filemap_write_and_wait(fs_info->btree_inode->i_mapping); 26977c2ca468SChris Mason invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 26987c2ca468SChris Mason 26991b1d1f66SJosef Bacik fail_block_groups: 27001b1d1f66SJosef Bacik btrfs_free_block_groups(fs_info); 2701af31f5e5SChris Mason 2702af31f5e5SChris Mason fail_tree_roots: 2703af31f5e5SChris Mason free_root_pointers(fs_info, 1); 2704af31f5e5SChris Mason 270539279cc3SChris Mason fail_sb_buffer: 270661d92c32SChris Mason btrfs_stop_workers(&fs_info->generic_worker); 2707306c8b68SChris Mason btrfs_stop_workers(&fs_info->readahead_workers); 2708247e743cSChris Mason btrfs_stop_workers(&fs_info->fixup_workers); 2709771ed689SChris Mason btrfs_stop_workers(&fs_info->delalloc_workers); 27108b712842SChris Mason btrfs_stop_workers(&fs_info->workers); 27118b712842SChris Mason btrfs_stop_workers(&fs_info->endio_workers); 2712d20f7043SChris Mason btrfs_stop_workers(&fs_info->endio_meta_workers); 2713cad321adSChris Mason btrfs_stop_workers(&fs_info->endio_meta_write_workers); 2714e6dcd2dcSChris Mason btrfs_stop_workers(&fs_info->endio_write_workers); 27150cb59c99SJosef Bacik btrfs_stop_workers(&fs_info->endio_freespace_worker); 27161cc127b5SChris Mason btrfs_stop_workers(&fs_info->submit_workers); 271716cdcec7SMiao Xie btrfs_stop_workers(&fs_info->delayed_workers); 2718bab39bf9SJosef Bacik btrfs_stop_workers(&fs_info->caching_workers); 27198ccf6f19SMiao Xie btrfs_stop_workers(&fs_info->flush_workers); 272016cdcec7SMiao Xie fail_alloc: 27214543df7eSChris Mason fail_iput: 2722586e46e2SIlya Dryomov btrfs_mapping_tree_free(&fs_info->mapping_tree); 2723586e46e2SIlya Dryomov 27247c2ca468SChris Mason invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 27254543df7eSChris Mason iput(fs_info->btree_inode); 2726ad081f14SJens Axboe fail_bdi: 27277e662854SQinghuang Feng bdi_destroy(&fs_info->bdi); 272876dda93cSYan, Zheng fail_srcu: 272976dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 27307e662854SQinghuang Feng fail: 2731586e46e2SIlya Dryomov btrfs_close_devices(fs_info->fs_devices); 2732ad2b2c80SAl Viro return err; 2733af31f5e5SChris Mason 2734af31f5e5SChris Mason recovery_tree_root: 2735af31f5e5SChris Mason if (!btrfs_test_opt(tree_root, RECOVERY)) 2736af31f5e5SChris Mason goto fail_tree_roots; 2737af31f5e5SChris Mason 2738af31f5e5SChris Mason free_root_pointers(fs_info, 0); 2739af31f5e5SChris Mason 2740af31f5e5SChris Mason /* don't use the log in recovery mode, it won't be valid */ 2741af31f5e5SChris Mason btrfs_set_super_log_root(disk_super, 0); 2742af31f5e5SChris Mason 2743af31f5e5SChris Mason /* we can't trust the free space cache either */ 2744af31f5e5SChris Mason btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); 2745af31f5e5SChris Mason 2746af31f5e5SChris Mason ret = next_root_backup(fs_info, fs_info->super_copy, 2747af31f5e5SChris Mason &num_backups_tried, &backup_index); 2748af31f5e5SChris Mason if (ret == -1) 2749af31f5e5SChris Mason goto fail_block_groups; 2750af31f5e5SChris Mason goto retry_root_backup; 2751eb60ceacSChris Mason } 2752eb60ceacSChris Mason 2753f2984462SChris Mason static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) 2754f2984462SChris Mason { 2755f2984462SChris Mason if (uptodate) { 2756f2984462SChris Mason set_buffer_uptodate(bh); 2757f2984462SChris Mason } else { 2758442a4f63SStefan Behrens struct btrfs_device *device = (struct btrfs_device *) 2759442a4f63SStefan Behrens bh->b_private; 2760442a4f63SStefan Behrens 2761606686eeSJosef Bacik printk_ratelimited_in_rcu(KERN_WARNING "lost page write due to " 2762606686eeSJosef Bacik "I/O error on %s\n", 2763606686eeSJosef Bacik rcu_str_deref(device->name)); 27641259ab75SChris Mason /* note, we dont' set_buffer_write_io_error because we have 27651259ab75SChris Mason * our own ways of dealing with the IO errors 27661259ab75SChris Mason */ 2767f2984462SChris Mason clear_buffer_uptodate(bh); 2768442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); 2769f2984462SChris Mason } 2770f2984462SChris Mason unlock_buffer(bh); 2771f2984462SChris Mason put_bh(bh); 2772f2984462SChris Mason } 2773f2984462SChris Mason 2774a512bbf8SYan Zheng struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) 2775a512bbf8SYan Zheng { 2776a512bbf8SYan Zheng struct buffer_head *bh; 2777a512bbf8SYan Zheng struct buffer_head *latest = NULL; 2778a512bbf8SYan Zheng struct btrfs_super_block *super; 2779a512bbf8SYan Zheng int i; 2780a512bbf8SYan Zheng u64 transid = 0; 2781a512bbf8SYan Zheng u64 bytenr; 2782a512bbf8SYan Zheng 2783a512bbf8SYan Zheng /* we would like to check all the supers, but that would make 2784a512bbf8SYan Zheng * a btrfs mount succeed after a mkfs from a different FS. 2785a512bbf8SYan Zheng * So, we need to add a special mount option to scan for 2786a512bbf8SYan Zheng * later supers, using BTRFS_SUPER_MIRROR_MAX instead 2787a512bbf8SYan Zheng */ 2788a512bbf8SYan Zheng for (i = 0; i < 1; i++) { 2789a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 2790a512bbf8SYan Zheng if (bytenr + 4096 >= i_size_read(bdev->bd_inode)) 2791a512bbf8SYan Zheng break; 2792a512bbf8SYan Zheng bh = __bread(bdev, bytenr / 4096, 4096); 2793a512bbf8SYan Zheng if (!bh) 2794a512bbf8SYan Zheng continue; 2795a512bbf8SYan Zheng 2796a512bbf8SYan Zheng super = (struct btrfs_super_block *)bh->b_data; 2797a512bbf8SYan Zheng if (btrfs_super_bytenr(super) != bytenr || 2798a512bbf8SYan Zheng strncmp((char *)(&super->magic), BTRFS_MAGIC, 2799a512bbf8SYan Zheng sizeof(super->magic))) { 2800a512bbf8SYan Zheng brelse(bh); 2801a512bbf8SYan Zheng continue; 2802a512bbf8SYan Zheng } 2803a512bbf8SYan Zheng 2804a512bbf8SYan Zheng if (!latest || btrfs_super_generation(super) > transid) { 2805a512bbf8SYan Zheng brelse(latest); 2806a512bbf8SYan Zheng latest = bh; 2807a512bbf8SYan Zheng transid = btrfs_super_generation(super); 2808a512bbf8SYan Zheng } else { 2809a512bbf8SYan Zheng brelse(bh); 2810a512bbf8SYan Zheng } 2811a512bbf8SYan Zheng } 2812a512bbf8SYan Zheng return latest; 2813a512bbf8SYan Zheng } 2814a512bbf8SYan Zheng 28154eedeb75SHisashi Hifumi /* 28164eedeb75SHisashi Hifumi * this should be called twice, once with wait == 0 and 28174eedeb75SHisashi Hifumi * once with wait == 1. When wait == 0 is done, all the buffer heads 28184eedeb75SHisashi Hifumi * we write are pinned. 28194eedeb75SHisashi Hifumi * 28204eedeb75SHisashi Hifumi * They are released when wait == 1 is done. 28214eedeb75SHisashi Hifumi * max_mirrors must be the same for both runs, and it indicates how 28224eedeb75SHisashi Hifumi * many supers on this one device should be written. 28234eedeb75SHisashi Hifumi * 28244eedeb75SHisashi Hifumi * max_mirrors == 0 means to write them all. 28254eedeb75SHisashi Hifumi */ 2826a512bbf8SYan Zheng static int write_dev_supers(struct btrfs_device *device, 2827a512bbf8SYan Zheng struct btrfs_super_block *sb, 2828a512bbf8SYan Zheng int do_barriers, int wait, int max_mirrors) 2829a512bbf8SYan Zheng { 2830a512bbf8SYan Zheng struct buffer_head *bh; 2831a512bbf8SYan Zheng int i; 2832a512bbf8SYan Zheng int ret; 2833a512bbf8SYan Zheng int errors = 0; 2834a512bbf8SYan Zheng u32 crc; 2835a512bbf8SYan Zheng u64 bytenr; 2836a512bbf8SYan Zheng 2837a512bbf8SYan Zheng if (max_mirrors == 0) 2838a512bbf8SYan Zheng max_mirrors = BTRFS_SUPER_MIRROR_MAX; 2839a512bbf8SYan Zheng 2840a512bbf8SYan Zheng for (i = 0; i < max_mirrors; i++) { 2841a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 2842a512bbf8SYan Zheng if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes) 2843a512bbf8SYan Zheng break; 2844a512bbf8SYan Zheng 2845a512bbf8SYan Zheng if (wait) { 2846a512bbf8SYan Zheng bh = __find_get_block(device->bdev, bytenr / 4096, 2847a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 2848a512bbf8SYan Zheng BUG_ON(!bh); 2849a512bbf8SYan Zheng wait_on_buffer(bh); 28504eedeb75SHisashi Hifumi if (!buffer_uptodate(bh)) 28514eedeb75SHisashi Hifumi errors++; 28524eedeb75SHisashi Hifumi 28534eedeb75SHisashi Hifumi /* drop our reference */ 28544eedeb75SHisashi Hifumi brelse(bh); 28554eedeb75SHisashi Hifumi 28564eedeb75SHisashi Hifumi /* drop the reference from the wait == 0 run */ 2857a512bbf8SYan Zheng brelse(bh); 2858a512bbf8SYan Zheng continue; 2859a512bbf8SYan Zheng } else { 2860a512bbf8SYan Zheng btrfs_set_super_bytenr(sb, bytenr); 2861a512bbf8SYan Zheng 2862a512bbf8SYan Zheng crc = ~(u32)0; 2863a512bbf8SYan Zheng crc = btrfs_csum_data(NULL, (char *)sb + 2864a512bbf8SYan Zheng BTRFS_CSUM_SIZE, crc, 2865a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE - 2866a512bbf8SYan Zheng BTRFS_CSUM_SIZE); 2867a512bbf8SYan Zheng btrfs_csum_final(crc, sb->csum); 2868a512bbf8SYan Zheng 28694eedeb75SHisashi Hifumi /* 28704eedeb75SHisashi Hifumi * one reference for us, and we leave it for the 28714eedeb75SHisashi Hifumi * caller 28724eedeb75SHisashi Hifumi */ 2873a512bbf8SYan Zheng bh = __getblk(device->bdev, bytenr / 4096, 2874a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 2875a512bbf8SYan Zheng memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); 2876a512bbf8SYan Zheng 28774eedeb75SHisashi Hifumi /* one reference for submit_bh */ 2878a512bbf8SYan Zheng get_bh(bh); 28794eedeb75SHisashi Hifumi 28804eedeb75SHisashi Hifumi set_buffer_uptodate(bh); 2881a512bbf8SYan Zheng lock_buffer(bh); 2882a512bbf8SYan Zheng bh->b_end_io = btrfs_end_buffer_write_sync; 2883442a4f63SStefan Behrens bh->b_private = device; 2884a512bbf8SYan Zheng } 2885a512bbf8SYan Zheng 2886387125fcSChris Mason /* 2887387125fcSChris Mason * we fua the first super. The others we allow 2888387125fcSChris Mason * to go down lazy. 2889387125fcSChris Mason */ 289021adbd5cSStefan Behrens ret = btrfsic_submit_bh(WRITE_FUA, bh); 28914eedeb75SHisashi Hifumi if (ret) 2892a512bbf8SYan Zheng errors++; 2893a512bbf8SYan Zheng } 2894a512bbf8SYan Zheng return errors < i ? 0 : -1; 2895a512bbf8SYan Zheng } 2896a512bbf8SYan Zheng 2897387125fcSChris Mason /* 2898387125fcSChris Mason * endio for the write_dev_flush, this will wake anyone waiting 2899387125fcSChris Mason * for the barrier when it is done 2900387125fcSChris Mason */ 2901387125fcSChris Mason static void btrfs_end_empty_barrier(struct bio *bio, int err) 2902387125fcSChris Mason { 2903387125fcSChris Mason if (err) { 2904387125fcSChris Mason if (err == -EOPNOTSUPP) 2905387125fcSChris Mason set_bit(BIO_EOPNOTSUPP, &bio->bi_flags); 2906387125fcSChris Mason clear_bit(BIO_UPTODATE, &bio->bi_flags); 2907387125fcSChris Mason } 2908387125fcSChris Mason if (bio->bi_private) 2909387125fcSChris Mason complete(bio->bi_private); 2910387125fcSChris Mason bio_put(bio); 2911387125fcSChris Mason } 2912387125fcSChris Mason 2913387125fcSChris Mason /* 2914387125fcSChris Mason * trigger flushes for one the devices. If you pass wait == 0, the flushes are 2915387125fcSChris Mason * sent down. With wait == 1, it waits for the previous flush. 2916387125fcSChris Mason * 2917387125fcSChris Mason * any device where the flush fails with eopnotsupp are flagged as not-barrier 2918387125fcSChris Mason * capable 2919387125fcSChris Mason */ 2920387125fcSChris Mason static int write_dev_flush(struct btrfs_device *device, int wait) 2921387125fcSChris Mason { 2922387125fcSChris Mason struct bio *bio; 2923387125fcSChris Mason int ret = 0; 2924387125fcSChris Mason 2925387125fcSChris Mason if (device->nobarriers) 2926387125fcSChris Mason return 0; 2927387125fcSChris Mason 2928387125fcSChris Mason if (wait) { 2929387125fcSChris Mason bio = device->flush_bio; 2930387125fcSChris Mason if (!bio) 2931387125fcSChris Mason return 0; 2932387125fcSChris Mason 2933387125fcSChris Mason wait_for_completion(&device->flush_wait); 2934387125fcSChris Mason 2935387125fcSChris Mason if (bio_flagged(bio, BIO_EOPNOTSUPP)) { 2936606686eeSJosef Bacik printk_in_rcu("btrfs: disabling barriers on dev %s\n", 2937606686eeSJosef Bacik rcu_str_deref(device->name)); 2938387125fcSChris Mason device->nobarriers = 1; 29395af3e8ccSStefan Behrens } else if (!bio_flagged(bio, BIO_UPTODATE)) { 2940387125fcSChris Mason ret = -EIO; 2941442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, 2942442a4f63SStefan Behrens BTRFS_DEV_STAT_FLUSH_ERRS); 2943387125fcSChris Mason } 2944387125fcSChris Mason 2945387125fcSChris Mason /* drop the reference from the wait == 0 run */ 2946387125fcSChris Mason bio_put(bio); 2947387125fcSChris Mason device->flush_bio = NULL; 2948387125fcSChris Mason 2949387125fcSChris Mason return ret; 2950387125fcSChris Mason } 2951387125fcSChris Mason 2952387125fcSChris Mason /* 2953387125fcSChris Mason * one reference for us, and we leave it for the 2954387125fcSChris Mason * caller 2955387125fcSChris Mason */ 29569c017abcSJesper Juhl device->flush_bio = NULL; 2957387125fcSChris Mason bio = bio_alloc(GFP_NOFS, 0); 2958387125fcSChris Mason if (!bio) 2959387125fcSChris Mason return -ENOMEM; 2960387125fcSChris Mason 2961387125fcSChris Mason bio->bi_end_io = btrfs_end_empty_barrier; 2962387125fcSChris Mason bio->bi_bdev = device->bdev; 2963387125fcSChris Mason init_completion(&device->flush_wait); 2964387125fcSChris Mason bio->bi_private = &device->flush_wait; 2965387125fcSChris Mason device->flush_bio = bio; 2966387125fcSChris Mason 2967387125fcSChris Mason bio_get(bio); 296821adbd5cSStefan Behrens btrfsic_submit_bio(WRITE_FLUSH, bio); 2969387125fcSChris Mason 2970387125fcSChris Mason return 0; 2971387125fcSChris Mason } 2972387125fcSChris Mason 2973387125fcSChris Mason /* 2974387125fcSChris Mason * send an empty flush down to each device in parallel, 2975387125fcSChris Mason * then wait for them 2976387125fcSChris Mason */ 2977387125fcSChris Mason static int barrier_all_devices(struct btrfs_fs_info *info) 2978387125fcSChris Mason { 2979387125fcSChris Mason struct list_head *head; 2980387125fcSChris Mason struct btrfs_device *dev; 29815af3e8ccSStefan Behrens int errors_send = 0; 29825af3e8ccSStefan Behrens int errors_wait = 0; 2983387125fcSChris Mason int ret; 2984387125fcSChris Mason 2985387125fcSChris Mason /* send down all the barriers */ 2986387125fcSChris Mason head = &info->fs_devices->devices; 2987387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 2988387125fcSChris Mason if (!dev->bdev) { 29895af3e8ccSStefan Behrens errors_send++; 2990387125fcSChris Mason continue; 2991387125fcSChris Mason } 2992387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 2993387125fcSChris Mason continue; 2994387125fcSChris Mason 2995387125fcSChris Mason ret = write_dev_flush(dev, 0); 2996387125fcSChris Mason if (ret) 29975af3e8ccSStefan Behrens errors_send++; 2998387125fcSChris Mason } 2999387125fcSChris Mason 3000387125fcSChris Mason /* wait for all the barriers */ 3001387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3002387125fcSChris Mason if (!dev->bdev) { 30035af3e8ccSStefan Behrens errors_wait++; 3004387125fcSChris Mason continue; 3005387125fcSChris Mason } 3006387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3007387125fcSChris Mason continue; 3008387125fcSChris Mason 3009387125fcSChris Mason ret = write_dev_flush(dev, 1); 3010387125fcSChris Mason if (ret) 30115af3e8ccSStefan Behrens errors_wait++; 3012387125fcSChris Mason } 30135af3e8ccSStefan Behrens if (errors_send > info->num_tolerated_disk_barrier_failures || 30145af3e8ccSStefan Behrens errors_wait > info->num_tolerated_disk_barrier_failures) 3015387125fcSChris Mason return -EIO; 3016387125fcSChris Mason return 0; 3017387125fcSChris Mason } 3018387125fcSChris Mason 30195af3e8ccSStefan Behrens int btrfs_calc_num_tolerated_disk_barrier_failures( 30205af3e8ccSStefan Behrens struct btrfs_fs_info *fs_info) 30215af3e8ccSStefan Behrens { 30225af3e8ccSStefan Behrens struct btrfs_ioctl_space_info space; 30235af3e8ccSStefan Behrens struct btrfs_space_info *sinfo; 30245af3e8ccSStefan Behrens u64 types[] = {BTRFS_BLOCK_GROUP_DATA, 30255af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_SYSTEM, 30265af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_METADATA, 30275af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; 30285af3e8ccSStefan Behrens int num_types = 4; 30295af3e8ccSStefan Behrens int i; 30305af3e8ccSStefan Behrens int c; 30315af3e8ccSStefan Behrens int num_tolerated_disk_barrier_failures = 30325af3e8ccSStefan Behrens (int)fs_info->fs_devices->num_devices; 30335af3e8ccSStefan Behrens 30345af3e8ccSStefan Behrens for (i = 0; i < num_types; i++) { 30355af3e8ccSStefan Behrens struct btrfs_space_info *tmp; 30365af3e8ccSStefan Behrens 30375af3e8ccSStefan Behrens sinfo = NULL; 30385af3e8ccSStefan Behrens rcu_read_lock(); 30395af3e8ccSStefan Behrens list_for_each_entry_rcu(tmp, &fs_info->space_info, list) { 30405af3e8ccSStefan Behrens if (tmp->flags == types[i]) { 30415af3e8ccSStefan Behrens sinfo = tmp; 30425af3e8ccSStefan Behrens break; 30435af3e8ccSStefan Behrens } 30445af3e8ccSStefan Behrens } 30455af3e8ccSStefan Behrens rcu_read_unlock(); 30465af3e8ccSStefan Behrens 30475af3e8ccSStefan Behrens if (!sinfo) 30485af3e8ccSStefan Behrens continue; 30495af3e8ccSStefan Behrens 30505af3e8ccSStefan Behrens down_read(&sinfo->groups_sem); 30515af3e8ccSStefan Behrens for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { 30525af3e8ccSStefan Behrens if (!list_empty(&sinfo->block_groups[c])) { 30535af3e8ccSStefan Behrens u64 flags; 30545af3e8ccSStefan Behrens 30555af3e8ccSStefan Behrens btrfs_get_block_group_info( 30565af3e8ccSStefan Behrens &sinfo->block_groups[c], &space); 30575af3e8ccSStefan Behrens if (space.total_bytes == 0 || 30585af3e8ccSStefan Behrens space.used_bytes == 0) 30595af3e8ccSStefan Behrens continue; 30605af3e8ccSStefan Behrens flags = space.flags; 30615af3e8ccSStefan Behrens /* 30625af3e8ccSStefan Behrens * return 30635af3e8ccSStefan Behrens * 0: if dup, single or RAID0 is configured for 30645af3e8ccSStefan Behrens * any of metadata, system or data, else 30655af3e8ccSStefan Behrens * 1: if RAID5 is configured, or if RAID1 or 30665af3e8ccSStefan Behrens * RAID10 is configured and only two mirrors 30675af3e8ccSStefan Behrens * are used, else 30685af3e8ccSStefan Behrens * 2: if RAID6 is configured, else 30695af3e8ccSStefan Behrens * num_mirrors - 1: if RAID1 or RAID10 is 30705af3e8ccSStefan Behrens * configured and more than 30715af3e8ccSStefan Behrens * 2 mirrors are used. 30725af3e8ccSStefan Behrens */ 30735af3e8ccSStefan Behrens if (num_tolerated_disk_barrier_failures > 0 && 30745af3e8ccSStefan Behrens ((flags & (BTRFS_BLOCK_GROUP_DUP | 30755af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_RAID0)) || 30765af3e8ccSStefan Behrens ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) 30775af3e8ccSStefan Behrens == 0))) 30785af3e8ccSStefan Behrens num_tolerated_disk_barrier_failures = 0; 30795af3e8ccSStefan Behrens else if (num_tolerated_disk_barrier_failures > 1 30805af3e8ccSStefan Behrens && 30815af3e8ccSStefan Behrens (flags & (BTRFS_BLOCK_GROUP_RAID1 | 30825af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_RAID10))) 30835af3e8ccSStefan Behrens num_tolerated_disk_barrier_failures = 1; 30845af3e8ccSStefan Behrens } 30855af3e8ccSStefan Behrens } 30865af3e8ccSStefan Behrens up_read(&sinfo->groups_sem); 30875af3e8ccSStefan Behrens } 30885af3e8ccSStefan Behrens 30895af3e8ccSStefan Behrens return num_tolerated_disk_barrier_failures; 30905af3e8ccSStefan Behrens } 30915af3e8ccSStefan Behrens 3092a512bbf8SYan Zheng int write_all_supers(struct btrfs_root *root, int max_mirrors) 3093f2984462SChris Mason { 3094e5e9a520SChris Mason struct list_head *head; 3095f2984462SChris Mason struct btrfs_device *dev; 3096a061fc8dSChris Mason struct btrfs_super_block *sb; 3097f2984462SChris Mason struct btrfs_dev_item *dev_item; 3098f2984462SChris Mason int ret; 3099f2984462SChris Mason int do_barriers; 3100a236aed1SChris Mason int max_errors; 3101a236aed1SChris Mason int total_errors = 0; 3102a061fc8dSChris Mason u64 flags; 3103f2984462SChris Mason 31046c41761fSDavid Sterba max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; 3105f2984462SChris Mason do_barriers = !btrfs_test_opt(root, NOBARRIER); 3106af31f5e5SChris Mason backup_super_roots(root->fs_info); 3107f2984462SChris Mason 31086c41761fSDavid Sterba sb = root->fs_info->super_for_commit; 3109a061fc8dSChris Mason dev_item = &sb->dev_item; 3110e5e9a520SChris Mason 3111174ba509SChris Mason mutex_lock(&root->fs_info->fs_devices->device_list_mutex); 3112e5e9a520SChris Mason head = &root->fs_info->fs_devices->devices; 3113387125fcSChris Mason 31145af3e8ccSStefan Behrens if (do_barriers) { 31155af3e8ccSStefan Behrens ret = barrier_all_devices(root->fs_info); 31165af3e8ccSStefan Behrens if (ret) { 31175af3e8ccSStefan Behrens mutex_unlock( 31185af3e8ccSStefan Behrens &root->fs_info->fs_devices->device_list_mutex); 31195af3e8ccSStefan Behrens btrfs_error(root->fs_info, ret, 31205af3e8ccSStefan Behrens "errors while submitting device barriers."); 31215af3e8ccSStefan Behrens return ret; 31225af3e8ccSStefan Behrens } 31235af3e8ccSStefan Behrens } 3124387125fcSChris Mason 31251f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3126dfe25020SChris Mason if (!dev->bdev) { 3127dfe25020SChris Mason total_errors++; 3128dfe25020SChris Mason continue; 3129dfe25020SChris Mason } 31302b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3131dfe25020SChris Mason continue; 3132dfe25020SChris Mason 31332b82032cSYan Zheng btrfs_set_stack_device_generation(dev_item, 0); 3134a061fc8dSChris Mason btrfs_set_stack_device_type(dev_item, dev->type); 3135a061fc8dSChris Mason btrfs_set_stack_device_id(dev_item, dev->devid); 3136a061fc8dSChris Mason btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes); 3137a061fc8dSChris Mason btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used); 3138a061fc8dSChris Mason btrfs_set_stack_device_io_align(dev_item, dev->io_align); 3139a061fc8dSChris Mason btrfs_set_stack_device_io_width(dev_item, dev->io_width); 3140a061fc8dSChris Mason btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); 3141a061fc8dSChris Mason memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); 31422b82032cSYan Zheng memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); 3143a512bbf8SYan Zheng 3144a061fc8dSChris Mason flags = btrfs_super_flags(sb); 3145a061fc8dSChris Mason btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); 3146f2984462SChris Mason 3147a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); 3148a236aed1SChris Mason if (ret) 3149a236aed1SChris Mason total_errors++; 3150f2984462SChris Mason } 3151a236aed1SChris Mason if (total_errors > max_errors) { 3152d397712bSChris Mason printk(KERN_ERR "btrfs: %d errors while writing supers\n", 3153d397712bSChris Mason total_errors); 315479787eaaSJeff Mahoney 315579787eaaSJeff Mahoney /* This shouldn't happen. FUA is masked off if unsupported */ 3156a236aed1SChris Mason BUG(); 3157a236aed1SChris Mason } 3158f2984462SChris Mason 3159a512bbf8SYan Zheng total_errors = 0; 31601f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3161dfe25020SChris Mason if (!dev->bdev) 3162dfe25020SChris Mason continue; 31632b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3164dfe25020SChris Mason continue; 3165dfe25020SChris Mason 3166a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); 3167a512bbf8SYan Zheng if (ret) 31681259ab75SChris Mason total_errors++; 3169f2984462SChris Mason } 3170174ba509SChris Mason mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 3171a236aed1SChris Mason if (total_errors > max_errors) { 317279787eaaSJeff Mahoney btrfs_error(root->fs_info, -EIO, 317379787eaaSJeff Mahoney "%d errors while writing supers", total_errors); 317479787eaaSJeff Mahoney return -EIO; 3175a236aed1SChris Mason } 3176f2984462SChris Mason return 0; 3177f2984462SChris Mason } 3178f2984462SChris Mason 3179a512bbf8SYan Zheng int write_ctree_super(struct btrfs_trans_handle *trans, 3180a512bbf8SYan Zheng struct btrfs_root *root, int max_mirrors) 3181cfaa7295SChris Mason { 3182e66f709bSChris Mason int ret; 31832c90e5d6SChris Mason 3184a512bbf8SYan Zheng ret = write_all_supers(root, max_mirrors); 31855f39d397SChris Mason return ret; 3186cfaa7295SChris Mason } 3187cfaa7295SChris Mason 3188143bede5SJeff Mahoney void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) 31892619ba1fSChris Mason { 31904df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 31912619ba1fSChris Mason radix_tree_delete(&fs_info->fs_roots_radix, 31922619ba1fSChris Mason (unsigned long)root->root_key.objectid); 31934df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 319476dda93cSYan, Zheng 319576dda93cSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) 319676dda93cSYan, Zheng synchronize_srcu(&fs_info->subvol_srcu); 319776dda93cSYan, Zheng 3198581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_pinned); 3199581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_ctl); 32004df27c4dSYan, Zheng free_fs_root(root); 32014df27c4dSYan, Zheng } 32024df27c4dSYan, Zheng 32034df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root) 32044df27c4dSYan, Zheng { 320582d5902dSLi Zefan iput(root->cache_inode); 32064df27c4dSYan, Zheng WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); 32070ee5dc67SAl Viro if (root->anon_dev) 32080ee5dc67SAl Viro free_anon_bdev(root->anon_dev); 32095f39d397SChris Mason free_extent_buffer(root->node); 32105f39d397SChris Mason free_extent_buffer(root->commit_root); 3211581bb050SLi Zefan kfree(root->free_ino_ctl); 3212581bb050SLi Zefan kfree(root->free_ino_pinned); 321358176a96SJosef Bacik kfree(root->name); 32142619ba1fSChris Mason kfree(root); 32152619ba1fSChris Mason } 32162619ba1fSChris Mason 3217143bede5SJeff Mahoney static void del_fs_roots(struct btrfs_fs_info *fs_info) 32180f7d52f4SChris Mason { 32190f7d52f4SChris Mason int ret; 32200f7d52f4SChris Mason struct btrfs_root *gang[8]; 32210f7d52f4SChris Mason int i; 32220f7d52f4SChris Mason 322376dda93cSYan, Zheng while (!list_empty(&fs_info->dead_roots)) { 322476dda93cSYan, Zheng gang[0] = list_entry(fs_info->dead_roots.next, 322576dda93cSYan, Zheng struct btrfs_root, root_list); 322676dda93cSYan, Zheng list_del(&gang[0]->root_list); 322776dda93cSYan, Zheng 322876dda93cSYan, Zheng if (gang[0]->in_radix) { 322976dda93cSYan, Zheng btrfs_free_fs_root(fs_info, gang[0]); 323076dda93cSYan, Zheng } else { 323176dda93cSYan, Zheng free_extent_buffer(gang[0]->node); 323276dda93cSYan, Zheng free_extent_buffer(gang[0]->commit_root); 323376dda93cSYan, Zheng kfree(gang[0]); 323476dda93cSYan, Zheng } 323576dda93cSYan, Zheng } 323676dda93cSYan, Zheng 32370f7d52f4SChris Mason while (1) { 32380f7d52f4SChris Mason ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 32390f7d52f4SChris Mason (void **)gang, 0, 32400f7d52f4SChris Mason ARRAY_SIZE(gang)); 32410f7d52f4SChris Mason if (!ret) 32420f7d52f4SChris Mason break; 32432619ba1fSChris Mason for (i = 0; i < ret; i++) 32445eda7b5eSChris Mason btrfs_free_fs_root(fs_info, gang[i]); 32450f7d52f4SChris Mason } 32460f7d52f4SChris Mason } 3247b4100d64SChris Mason 3248c146afadSYan Zheng int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) 3249c146afadSYan Zheng { 3250c146afadSYan Zheng u64 root_objectid = 0; 3251c146afadSYan Zheng struct btrfs_root *gang[8]; 3252c146afadSYan Zheng int i; 3253c146afadSYan Zheng int ret; 3254c146afadSYan Zheng 3255c146afadSYan Zheng while (1) { 3256c146afadSYan Zheng ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 3257c146afadSYan Zheng (void **)gang, root_objectid, 3258c146afadSYan Zheng ARRAY_SIZE(gang)); 3259c146afadSYan Zheng if (!ret) 3260c146afadSYan Zheng break; 32615d4f98a2SYan Zheng 32625d4f98a2SYan Zheng root_objectid = gang[ret - 1]->root_key.objectid + 1; 3263c146afadSYan Zheng for (i = 0; i < ret; i++) { 326466b4ffd1SJosef Bacik int err; 326566b4ffd1SJosef Bacik 3266c146afadSYan Zheng root_objectid = gang[i]->root_key.objectid; 326766b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(gang[i]); 326866b4ffd1SJosef Bacik if (err) 326966b4ffd1SJosef Bacik return err; 3270c146afadSYan Zheng } 3271c146afadSYan Zheng root_objectid++; 3272c146afadSYan Zheng } 3273c146afadSYan Zheng return 0; 3274c146afadSYan Zheng } 3275c146afadSYan Zheng 3276c146afadSYan Zheng int btrfs_commit_super(struct btrfs_root *root) 3277c146afadSYan Zheng { 3278c146afadSYan Zheng struct btrfs_trans_handle *trans; 3279c146afadSYan Zheng int ret; 3280c146afadSYan Zheng 3281c146afadSYan Zheng mutex_lock(&root->fs_info->cleaner_mutex); 328224bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 3283c146afadSYan Zheng btrfs_clean_old_snapshots(root); 3284c146afadSYan Zheng mutex_unlock(&root->fs_info->cleaner_mutex); 3285c71bf099SYan, Zheng 3286c71bf099SYan, Zheng /* wait until ongoing cleanup work done */ 3287c71bf099SYan, Zheng down_write(&root->fs_info->cleanup_work_sem); 3288c71bf099SYan, Zheng up_write(&root->fs_info->cleanup_work_sem); 3289c71bf099SYan, Zheng 32907a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 32913612b495STsutomu Itoh if (IS_ERR(trans)) 32923612b495STsutomu Itoh return PTR_ERR(trans); 3293c146afadSYan Zheng ret = btrfs_commit_transaction(trans, root); 329479787eaaSJeff Mahoney if (ret) 329579787eaaSJeff Mahoney return ret; 3296c146afadSYan Zheng /* run commit again to drop the original snapshot */ 32977a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 32983612b495STsutomu Itoh if (IS_ERR(trans)) 32993612b495STsutomu Itoh return PTR_ERR(trans); 330079787eaaSJeff Mahoney ret = btrfs_commit_transaction(trans, root); 330179787eaaSJeff Mahoney if (ret) 330279787eaaSJeff Mahoney return ret; 3303c146afadSYan Zheng ret = btrfs_write_and_wait_transaction(NULL, root); 330479787eaaSJeff Mahoney if (ret) { 330579787eaaSJeff Mahoney btrfs_error(root->fs_info, ret, 330679787eaaSJeff Mahoney "Failed to sync btree inode to disk."); 330779787eaaSJeff Mahoney return ret; 330879787eaaSJeff Mahoney } 3309c146afadSYan Zheng 3310a512bbf8SYan Zheng ret = write_ctree_super(NULL, root, 0); 3311c146afadSYan Zheng return ret; 3312c146afadSYan Zheng } 3313c146afadSYan Zheng 3314e20d96d6SChris Mason int close_ctree(struct btrfs_root *root) 3315eb60ceacSChris Mason { 33160f7d52f4SChris Mason struct btrfs_fs_info *fs_info = root->fs_info; 3317c146afadSYan Zheng int ret; 3318e089f05cSChris Mason 3319facda1e7SChris Mason fs_info->closing = 1; 3320a2135011SChris Mason smp_mb(); 3321a2135011SChris Mason 3322837d5b6eSIlya Dryomov /* pause restriper - we want to resume on mount */ 3323aa1b8cd4SStefan Behrens btrfs_pause_balance(fs_info); 3324837d5b6eSIlya Dryomov 33258dabb742SStefan Behrens btrfs_dev_replace_suspend_for_unmount(fs_info); 33268dabb742SStefan Behrens 3327aa1b8cd4SStefan Behrens btrfs_scrub_cancel(fs_info); 33284cb5300bSChris Mason 33294cb5300bSChris Mason /* wait for any defraggers to finish */ 33304cb5300bSChris Mason wait_event(fs_info->transaction_wait, 33314cb5300bSChris Mason (atomic_read(&fs_info->defrag_running) == 0)); 33324cb5300bSChris Mason 33334cb5300bSChris Mason /* clear out the rbtree of defraggable inodes */ 333426176e7cSMiao Xie btrfs_cleanup_defrag_inodes(fs_info); 33354cb5300bSChris Mason 3336c146afadSYan Zheng if (!(fs_info->sb->s_flags & MS_RDONLY)) { 3337c146afadSYan Zheng ret = btrfs_commit_super(root); 3338d397712bSChris Mason if (ret) 3339d397712bSChris Mason printk(KERN_ERR "btrfs: commit super ret %d\n", ret); 3340c146afadSYan Zheng } 3341ed2ff2cbSChris Mason 334268ce9682SStefan Behrens if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) 334368ce9682SStefan Behrens btrfs_error_commit_super(root); 3344acce952bSliubo 3345300e4f8aSJosef Bacik btrfs_put_block_group_cache(fs_info); 3346300e4f8aSJosef Bacik 3347e3029d9fSAl Viro kthread_stop(fs_info->transaction_kthread); 3348e3029d9fSAl Viro kthread_stop(fs_info->cleaner_kthread); 33498929ecfaSYan, Zheng 3350f25784b3SYan Zheng fs_info->closing = 2; 3351f25784b3SYan Zheng smp_mb(); 3352f25784b3SYan Zheng 3353bcef60f2SArne Jansen btrfs_free_qgroup_config(root->fs_info); 3354bcef60f2SArne Jansen 3355b0c68f8bSChris Mason if (fs_info->delalloc_bytes) { 3356d397712bSChris Mason printk(KERN_INFO "btrfs: at unmount delalloc count %llu\n", 335721380931SJoel Becker (unsigned long long)fs_info->delalloc_bytes); 3358b0c68f8bSChris Mason } 335931153d81SYan Zheng 33605f39d397SChris Mason free_extent_buffer(fs_info->extent_root->node); 33615d4f98a2SYan Zheng free_extent_buffer(fs_info->extent_root->commit_root); 33625f39d397SChris Mason free_extent_buffer(fs_info->tree_root->node); 33635d4f98a2SYan Zheng free_extent_buffer(fs_info->tree_root->commit_root); 3364e3029d9fSAl Viro free_extent_buffer(fs_info->chunk_root->node); 3365e3029d9fSAl Viro free_extent_buffer(fs_info->chunk_root->commit_root); 3366e3029d9fSAl Viro free_extent_buffer(fs_info->dev_root->node); 3367e3029d9fSAl Viro free_extent_buffer(fs_info->dev_root->commit_root); 3368e3029d9fSAl Viro free_extent_buffer(fs_info->csum_root->node); 3369e3029d9fSAl Viro free_extent_buffer(fs_info->csum_root->commit_root); 3370bcef60f2SArne Jansen if (fs_info->quota_root) { 3371bcef60f2SArne Jansen free_extent_buffer(fs_info->quota_root->node); 3372bcef60f2SArne Jansen free_extent_buffer(fs_info->quota_root->commit_root); 3373bcef60f2SArne Jansen } 3374d20f7043SChris Mason 3375e3029d9fSAl Viro btrfs_free_block_groups(fs_info); 3376c146afadSYan Zheng 33770f7d52f4SChris Mason del_fs_roots(fs_info); 3378d10c5f31SChris Mason 3379c146afadSYan Zheng iput(fs_info->btree_inode); 33809ad6b7bcSChris Mason 338161d92c32SChris Mason btrfs_stop_workers(&fs_info->generic_worker); 3382247e743cSChris Mason btrfs_stop_workers(&fs_info->fixup_workers); 3383771ed689SChris Mason btrfs_stop_workers(&fs_info->delalloc_workers); 33848b712842SChris Mason btrfs_stop_workers(&fs_info->workers); 33858b712842SChris Mason btrfs_stop_workers(&fs_info->endio_workers); 3386d20f7043SChris Mason btrfs_stop_workers(&fs_info->endio_meta_workers); 3387cad321adSChris Mason btrfs_stop_workers(&fs_info->endio_meta_write_workers); 3388e6dcd2dcSChris Mason btrfs_stop_workers(&fs_info->endio_write_workers); 33890cb59c99SJosef Bacik btrfs_stop_workers(&fs_info->endio_freespace_worker); 33901cc127b5SChris Mason btrfs_stop_workers(&fs_info->submit_workers); 339116cdcec7SMiao Xie btrfs_stop_workers(&fs_info->delayed_workers); 3392bab39bf9SJosef Bacik btrfs_stop_workers(&fs_info->caching_workers); 339390519d66SArne Jansen btrfs_stop_workers(&fs_info->readahead_workers); 33948ccf6f19SMiao Xie btrfs_stop_workers(&fs_info->flush_workers); 3395d6bfde87SChris Mason 339621adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 339721adbd5cSStefan Behrens if (btrfs_test_opt(root, CHECK_INTEGRITY)) 339821adbd5cSStefan Behrens btrfsic_unmount(root, fs_info->fs_devices); 339921adbd5cSStefan Behrens #endif 340021adbd5cSStefan Behrens 3401dfe25020SChris Mason btrfs_close_devices(fs_info->fs_devices); 34020b86a832SChris Mason btrfs_mapping_tree_free(&fs_info->mapping_tree); 3403b248a415SChris Mason 340404160088SChris Mason bdi_destroy(&fs_info->bdi); 340576dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 34060b86a832SChris Mason 3407eb60ceacSChris Mason return 0; 3408eb60ceacSChris Mason } 3409eb60ceacSChris Mason 3410b9fab919SChris Mason int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, 3411b9fab919SChris Mason int atomic) 3412ccd467d6SChris Mason { 34131259ab75SChris Mason int ret; 3414727011e0SChris Mason struct inode *btree_inode = buf->pages[0]->mapping->host; 34151259ab75SChris Mason 34160b32f4bbSJosef Bacik ret = extent_buffer_uptodate(buf); 34171259ab75SChris Mason if (!ret) 34181259ab75SChris Mason return ret; 34191259ab75SChris Mason 34201259ab75SChris Mason ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, 3421b9fab919SChris Mason parent_transid, atomic); 3422b9fab919SChris Mason if (ret == -EAGAIN) 3423b9fab919SChris Mason return ret; 34241259ab75SChris Mason return !ret; 34255f39d397SChris Mason } 34266702ed49SChris Mason 34275f39d397SChris Mason int btrfs_set_buffer_uptodate(struct extent_buffer *buf) 34285f39d397SChris Mason { 34290b32f4bbSJosef Bacik return set_extent_buffer_uptodate(buf); 34305f39d397SChris Mason } 34315f39d397SChris Mason 34325f39d397SChris Mason void btrfs_mark_buffer_dirty(struct extent_buffer *buf) 34335f39d397SChris Mason { 3434727011e0SChris Mason struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; 34355f39d397SChris Mason u64 transid = btrfs_header_generation(buf); 3436b9473439SChris Mason int was_dirty; 3437b4ce94deSChris Mason 3438b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 343931b1a2bdSJulia Lawall if (transid != root->fs_info->generation) 344031b1a2bdSJulia Lawall WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, " 3441d397712bSChris Mason "found %llu running %llu\n", 3442db94535dSChris Mason (unsigned long long)buf->start, 3443d397712bSChris Mason (unsigned long long)transid, 3444d397712bSChris Mason (unsigned long long)root->fs_info->generation); 34450b32f4bbSJosef Bacik was_dirty = set_extent_buffer_dirty(buf); 3446b9473439SChris Mason if (!was_dirty) { 3447b9473439SChris Mason spin_lock(&root->fs_info->delalloc_lock); 3448b9473439SChris Mason root->fs_info->dirty_metadata_bytes += buf->len; 3449b9473439SChris Mason spin_unlock(&root->fs_info->delalloc_lock); 3450b9473439SChris Mason } 3451eb60ceacSChris Mason } 3452eb60ceacSChris Mason 3453b53d3f5dSLiu Bo static void __btrfs_btree_balance_dirty(struct btrfs_root *root, 3454b53d3f5dSLiu Bo int flush_delayed) 345535b7e476SChris Mason { 3456188de649SChris Mason /* 3457188de649SChris Mason * looks as though older kernels can get into trouble with 3458188de649SChris Mason * this code, they end up stuck in balance_dirty_pages forever 3459188de649SChris Mason */ 3460d6bfde87SChris Mason u64 num_dirty; 3461771ed689SChris Mason unsigned long thresh = 32 * 1024 * 1024; 3462d6bfde87SChris Mason 34636933c02eSJens Axboe if (current->flags & PF_MEMALLOC) 3464d6bfde87SChris Mason return; 3465d6bfde87SChris Mason 3466b53d3f5dSLiu Bo if (flush_delayed) 346716cdcec7SMiao Xie btrfs_balance_delayed_items(root); 346816cdcec7SMiao Xie 346916cdcec7SMiao Xie num_dirty = root->fs_info->dirty_metadata_bytes; 347016cdcec7SMiao Xie 347116cdcec7SMiao Xie if (num_dirty > thresh) { 347216cdcec7SMiao Xie balance_dirty_pages_ratelimited_nr( 347316cdcec7SMiao Xie root->fs_info->btree_inode->i_mapping, 1); 347416cdcec7SMiao Xie } 347516cdcec7SMiao Xie return; 347616cdcec7SMiao Xie } 347716cdcec7SMiao Xie 3478b53d3f5dSLiu Bo void btrfs_btree_balance_dirty(struct btrfs_root *root) 347916cdcec7SMiao Xie { 3480b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 1); 348135b7e476SChris Mason } 3482b53d3f5dSLiu Bo 3483b53d3f5dSLiu Bo void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root) 3484b53d3f5dSLiu Bo { 3485b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 0); 3486d6bfde87SChris Mason } 34876b80053dSChris Mason 3488ca7a79adSChris Mason int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) 34896b80053dSChris Mason { 3490727011e0SChris Mason struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; 34910b32f4bbSJosef Bacik return btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 34926b80053dSChris Mason } 34930da5468fSChris Mason 3494fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 3495acce952bSliubo int read_only) 3496acce952bSliubo { 3497fcd1f065SDavid Sterba if (btrfs_super_csum_type(fs_info->super_copy) >= ARRAY_SIZE(btrfs_csum_sizes)) { 3498fcd1f065SDavid Sterba printk(KERN_ERR "btrfs: unsupported checksum algorithm\n"); 3499fcd1f065SDavid Sterba return -EINVAL; 3500fcd1f065SDavid Sterba } 3501acce952bSliubo 3502fcd1f065SDavid Sterba if (read_only) 3503fcd1f065SDavid Sterba return 0; 3504fcd1f065SDavid Sterba 3505fcd1f065SDavid Sterba return 0; 3506fcd1f065SDavid Sterba } 3507fcd1f065SDavid Sterba 350868ce9682SStefan Behrens void btrfs_error_commit_super(struct btrfs_root *root) 3509acce952bSliubo { 3510acce952bSliubo mutex_lock(&root->fs_info->cleaner_mutex); 3511acce952bSliubo btrfs_run_delayed_iputs(root); 3512acce952bSliubo mutex_unlock(&root->fs_info->cleaner_mutex); 3513acce952bSliubo 3514acce952bSliubo down_write(&root->fs_info->cleanup_work_sem); 3515acce952bSliubo up_write(&root->fs_info->cleanup_work_sem); 3516acce952bSliubo 3517acce952bSliubo /* cleanup FS via transaction */ 3518acce952bSliubo btrfs_cleanup_transaction(root); 3519acce952bSliubo } 3520acce952bSliubo 3521143bede5SJeff Mahoney static void btrfs_destroy_ordered_operations(struct btrfs_root *root) 3522acce952bSliubo { 3523acce952bSliubo struct btrfs_inode *btrfs_inode; 3524acce952bSliubo struct list_head splice; 3525acce952bSliubo 3526acce952bSliubo INIT_LIST_HEAD(&splice); 3527acce952bSliubo 3528acce952bSliubo mutex_lock(&root->fs_info->ordered_operations_mutex); 3529acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3530acce952bSliubo 3531acce952bSliubo list_splice_init(&root->fs_info->ordered_operations, &splice); 3532acce952bSliubo while (!list_empty(&splice)) { 3533acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3534acce952bSliubo ordered_operations); 3535acce952bSliubo 3536acce952bSliubo list_del_init(&btrfs_inode->ordered_operations); 3537acce952bSliubo 3538acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3539acce952bSliubo } 3540acce952bSliubo 3541acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3542acce952bSliubo mutex_unlock(&root->fs_info->ordered_operations_mutex); 3543acce952bSliubo } 3544acce952bSliubo 3545143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root) 3546acce952bSliubo { 3547acce952bSliubo struct list_head splice; 3548acce952bSliubo struct btrfs_ordered_extent *ordered; 3549acce952bSliubo struct inode *inode; 3550acce952bSliubo 3551acce952bSliubo INIT_LIST_HEAD(&splice); 3552acce952bSliubo 3553acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3554acce952bSliubo 3555acce952bSliubo list_splice_init(&root->fs_info->ordered_extents, &splice); 3556acce952bSliubo while (!list_empty(&splice)) { 3557acce952bSliubo ordered = list_entry(splice.next, struct btrfs_ordered_extent, 3558acce952bSliubo root_extent_list); 3559acce952bSliubo 3560acce952bSliubo list_del_init(&ordered->root_extent_list); 3561acce952bSliubo atomic_inc(&ordered->refs); 3562acce952bSliubo 3563acce952bSliubo /* the inode may be getting freed (in sys_unlink path). */ 3564acce952bSliubo inode = igrab(ordered->inode); 3565acce952bSliubo 3566acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3567acce952bSliubo if (inode) 3568acce952bSliubo iput(inode); 3569acce952bSliubo 3570acce952bSliubo atomic_set(&ordered->refs, 1); 3571acce952bSliubo btrfs_put_ordered_extent(ordered); 3572acce952bSliubo 3573acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3574acce952bSliubo } 3575acce952bSliubo 3576acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3577acce952bSliubo } 3578acce952bSliubo 357979787eaaSJeff Mahoney int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 3580acce952bSliubo struct btrfs_root *root) 3581acce952bSliubo { 3582acce952bSliubo struct rb_node *node; 3583acce952bSliubo struct btrfs_delayed_ref_root *delayed_refs; 3584acce952bSliubo struct btrfs_delayed_ref_node *ref; 3585acce952bSliubo int ret = 0; 3586acce952bSliubo 3587acce952bSliubo delayed_refs = &trans->delayed_refs; 3588acce952bSliubo 3589acce952bSliubo spin_lock(&delayed_refs->lock); 3590acce952bSliubo if (delayed_refs->num_entries == 0) { 3591cfece4dbSDavid Sterba spin_unlock(&delayed_refs->lock); 3592acce952bSliubo printk(KERN_INFO "delayed_refs has NO entry\n"); 3593acce952bSliubo return ret; 3594acce952bSliubo } 3595acce952bSliubo 3596b939d1abSJosef Bacik while ((node = rb_first(&delayed_refs->root)) != NULL) { 3597acce952bSliubo ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node); 3598acce952bSliubo 3599acce952bSliubo atomic_set(&ref->refs, 1); 3600acce952bSliubo if (btrfs_delayed_ref_is_head(ref)) { 3601acce952bSliubo struct btrfs_delayed_ref_head *head; 3602acce952bSliubo 3603acce952bSliubo head = btrfs_delayed_node_to_head(ref); 3604b939d1abSJosef Bacik if (!mutex_trylock(&head->mutex)) { 3605b939d1abSJosef Bacik atomic_inc(&ref->refs); 360679787eaaSJeff Mahoney spin_unlock(&delayed_refs->lock); 3607b939d1abSJosef Bacik 3608b939d1abSJosef Bacik /* Need to wait for the delayed ref to run */ 3609acce952bSliubo mutex_lock(&head->mutex); 3610b939d1abSJosef Bacik mutex_unlock(&head->mutex); 3611b939d1abSJosef Bacik btrfs_put_delayed_ref(ref); 3612b939d1abSJosef Bacik 3613e18fca73SJosef Bacik spin_lock(&delayed_refs->lock); 3614b939d1abSJosef Bacik continue; 3615b939d1abSJosef Bacik } 3616b939d1abSJosef Bacik 361778a6184aSMiao Xie btrfs_free_delayed_extent_op(head->extent_op); 3618acce952bSliubo delayed_refs->num_heads--; 3619acce952bSliubo if (list_empty(&head->cluster)) 3620acce952bSliubo delayed_refs->num_heads_ready--; 3621acce952bSliubo list_del_init(&head->cluster); 3622acce952bSliubo } 3623b939d1abSJosef Bacik ref->in_tree = 0; 3624b939d1abSJosef Bacik rb_erase(&ref->rb_node, &delayed_refs->root); 3625b939d1abSJosef Bacik delayed_refs->num_entries--; 3626b939d1abSJosef Bacik 3627acce952bSliubo spin_unlock(&delayed_refs->lock); 3628acce952bSliubo btrfs_put_delayed_ref(ref); 3629acce952bSliubo 3630acce952bSliubo cond_resched(); 3631acce952bSliubo spin_lock(&delayed_refs->lock); 3632acce952bSliubo } 3633acce952bSliubo 3634acce952bSliubo spin_unlock(&delayed_refs->lock); 3635acce952bSliubo 3636acce952bSliubo return ret; 3637acce952bSliubo } 3638acce952bSliubo 3639143bede5SJeff Mahoney static void btrfs_destroy_pending_snapshots(struct btrfs_transaction *t) 3640acce952bSliubo { 3641acce952bSliubo struct btrfs_pending_snapshot *snapshot; 3642acce952bSliubo struct list_head splice; 3643acce952bSliubo 3644acce952bSliubo INIT_LIST_HEAD(&splice); 3645acce952bSliubo 3646acce952bSliubo list_splice_init(&t->pending_snapshots, &splice); 3647acce952bSliubo 3648acce952bSliubo while (!list_empty(&splice)) { 3649acce952bSliubo snapshot = list_entry(splice.next, 3650acce952bSliubo struct btrfs_pending_snapshot, 3651acce952bSliubo list); 3652acce952bSliubo 3653acce952bSliubo list_del_init(&snapshot->list); 3654acce952bSliubo 3655acce952bSliubo kfree(snapshot); 3656acce952bSliubo } 3657acce952bSliubo } 3658acce952bSliubo 3659143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) 3660acce952bSliubo { 3661acce952bSliubo struct btrfs_inode *btrfs_inode; 3662acce952bSliubo struct list_head splice; 3663acce952bSliubo 3664acce952bSliubo INIT_LIST_HEAD(&splice); 3665acce952bSliubo 3666acce952bSliubo spin_lock(&root->fs_info->delalloc_lock); 36675be76758SDavid Sterba list_splice_init(&root->fs_info->delalloc_inodes, &splice); 3668acce952bSliubo 3669acce952bSliubo while (!list_empty(&splice)) { 3670acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3671acce952bSliubo delalloc_inodes); 3672acce952bSliubo 3673acce952bSliubo list_del_init(&btrfs_inode->delalloc_inodes); 3674acce952bSliubo 3675acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3676acce952bSliubo } 3677acce952bSliubo 3678acce952bSliubo spin_unlock(&root->fs_info->delalloc_lock); 3679acce952bSliubo } 3680acce952bSliubo 3681acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 3682acce952bSliubo struct extent_io_tree *dirty_pages, 3683acce952bSliubo int mark) 3684acce952bSliubo { 3685acce952bSliubo int ret; 3686acce952bSliubo struct page *page; 3687acce952bSliubo struct inode *btree_inode = root->fs_info->btree_inode; 3688acce952bSliubo struct extent_buffer *eb; 3689acce952bSliubo u64 start = 0; 3690acce952bSliubo u64 end; 3691acce952bSliubo u64 offset; 3692acce952bSliubo unsigned long index; 3693acce952bSliubo 3694acce952bSliubo while (1) { 3695acce952bSliubo ret = find_first_extent_bit(dirty_pages, start, &start, &end, 3696e6138876SJosef Bacik mark, NULL); 3697acce952bSliubo if (ret) 3698acce952bSliubo break; 3699acce952bSliubo 3700acce952bSliubo clear_extent_bits(dirty_pages, start, end, mark, GFP_NOFS); 3701acce952bSliubo while (start <= end) { 3702acce952bSliubo index = start >> PAGE_CACHE_SHIFT; 3703acce952bSliubo start = (u64)(index + 1) << PAGE_CACHE_SHIFT; 3704acce952bSliubo page = find_get_page(btree_inode->i_mapping, index); 3705acce952bSliubo if (!page) 3706acce952bSliubo continue; 3707acce952bSliubo offset = page_offset(page); 3708acce952bSliubo 3709acce952bSliubo spin_lock(&dirty_pages->buffer_lock); 3710acce952bSliubo eb = radix_tree_lookup( 3711acce952bSliubo &(&BTRFS_I(page->mapping->host)->io_tree)->buffer, 3712acce952bSliubo offset >> PAGE_CACHE_SHIFT); 3713acce952bSliubo spin_unlock(&dirty_pages->buffer_lock); 3714ee670f0aSJosef Bacik if (eb) 3715acce952bSliubo ret = test_and_clear_bit(EXTENT_BUFFER_DIRTY, 3716acce952bSliubo &eb->bflags); 3717acce952bSliubo if (PageWriteback(page)) 3718acce952bSliubo end_page_writeback(page); 3719acce952bSliubo 3720acce952bSliubo lock_page(page); 3721acce952bSliubo if (PageDirty(page)) { 3722acce952bSliubo clear_page_dirty_for_io(page); 3723acce952bSliubo spin_lock_irq(&page->mapping->tree_lock); 3724acce952bSliubo radix_tree_tag_clear(&page->mapping->page_tree, 3725acce952bSliubo page_index(page), 3726acce952bSliubo PAGECACHE_TAG_DIRTY); 3727acce952bSliubo spin_unlock_irq(&page->mapping->tree_lock); 3728acce952bSliubo } 3729acce952bSliubo 3730acce952bSliubo unlock_page(page); 3731ee670f0aSJosef Bacik page_cache_release(page); 3732acce952bSliubo } 3733acce952bSliubo } 3734acce952bSliubo 3735acce952bSliubo return ret; 3736acce952bSliubo } 3737acce952bSliubo 3738acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 3739acce952bSliubo struct extent_io_tree *pinned_extents) 3740acce952bSliubo { 3741acce952bSliubo struct extent_io_tree *unpin; 3742acce952bSliubo u64 start; 3743acce952bSliubo u64 end; 3744acce952bSliubo int ret; 3745ed0eaa14SLiu Bo bool loop = true; 3746acce952bSliubo 3747acce952bSliubo unpin = pinned_extents; 3748ed0eaa14SLiu Bo again: 3749acce952bSliubo while (1) { 3750acce952bSliubo ret = find_first_extent_bit(unpin, 0, &start, &end, 3751e6138876SJosef Bacik EXTENT_DIRTY, NULL); 3752acce952bSliubo if (ret) 3753acce952bSliubo break; 3754acce952bSliubo 3755acce952bSliubo /* opt_discard */ 37565378e607SLi Dongyang if (btrfs_test_opt(root, DISCARD)) 37575378e607SLi Dongyang ret = btrfs_error_discard_extent(root, start, 37585378e607SLi Dongyang end + 1 - start, 37595378e607SLi Dongyang NULL); 3760acce952bSliubo 3761acce952bSliubo clear_extent_dirty(unpin, start, end, GFP_NOFS); 3762acce952bSliubo btrfs_error_unpin_extent_range(root, start, end); 3763acce952bSliubo cond_resched(); 3764acce952bSliubo } 3765acce952bSliubo 3766ed0eaa14SLiu Bo if (loop) { 3767ed0eaa14SLiu Bo if (unpin == &root->fs_info->freed_extents[0]) 3768ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[1]; 3769ed0eaa14SLiu Bo else 3770ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[0]; 3771ed0eaa14SLiu Bo loop = false; 3772ed0eaa14SLiu Bo goto again; 3773ed0eaa14SLiu Bo } 3774ed0eaa14SLiu Bo 3775acce952bSliubo return 0; 3776acce952bSliubo } 3777acce952bSliubo 377849b25e05SJeff Mahoney void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, 377949b25e05SJeff Mahoney struct btrfs_root *root) 378049b25e05SJeff Mahoney { 378149b25e05SJeff Mahoney btrfs_destroy_delayed_refs(cur_trans, root); 378249b25e05SJeff Mahoney btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv, 378349b25e05SJeff Mahoney cur_trans->dirty_pages.dirty_bytes); 378449b25e05SJeff Mahoney 378549b25e05SJeff Mahoney /* FIXME: cleanup wait for commit */ 378649b25e05SJeff Mahoney cur_trans->in_commit = 1; 378749b25e05SJeff Mahoney cur_trans->blocked = 1; 378849b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_blocked_wait); 378949b25e05SJeff Mahoney 379049b25e05SJeff Mahoney cur_trans->blocked = 0; 379149b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_wait); 379249b25e05SJeff Mahoney 379349b25e05SJeff Mahoney cur_trans->commit_done = 1; 379449b25e05SJeff Mahoney wake_up(&cur_trans->commit_wait); 379549b25e05SJeff Mahoney 379667cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 379767cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 379867cde344SMiao Xie 379949b25e05SJeff Mahoney btrfs_destroy_pending_snapshots(cur_trans); 380049b25e05SJeff Mahoney 380149b25e05SJeff Mahoney btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, 380249b25e05SJeff Mahoney EXTENT_DIRTY); 38036e841e32SLiu Bo btrfs_destroy_pinned_extent(root, 38046e841e32SLiu Bo root->fs_info->pinned_extents); 380549b25e05SJeff Mahoney 380649b25e05SJeff Mahoney /* 380749b25e05SJeff Mahoney memset(cur_trans, 0, sizeof(*cur_trans)); 380849b25e05SJeff Mahoney kmem_cache_free(btrfs_transaction_cachep, cur_trans); 380949b25e05SJeff Mahoney */ 381049b25e05SJeff Mahoney } 381149b25e05SJeff Mahoney 381249b25e05SJeff Mahoney int btrfs_cleanup_transaction(struct btrfs_root *root) 3813acce952bSliubo { 3814acce952bSliubo struct btrfs_transaction *t; 3815acce952bSliubo LIST_HEAD(list); 3816acce952bSliubo 3817acce952bSliubo mutex_lock(&root->fs_info->transaction_kthread_mutex); 3818acce952bSliubo 3819a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3820acce952bSliubo list_splice_init(&root->fs_info->trans_list, &list); 3821a4abeea4SJosef Bacik root->fs_info->trans_no_join = 1; 3822a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3823a4abeea4SJosef Bacik 3824acce952bSliubo while (!list_empty(&list)) { 3825acce952bSliubo t = list_entry(list.next, struct btrfs_transaction, list); 3826acce952bSliubo if (!t) 3827acce952bSliubo break; 3828acce952bSliubo 3829acce952bSliubo btrfs_destroy_ordered_operations(root); 3830acce952bSliubo 3831acce952bSliubo btrfs_destroy_ordered_extents(root); 3832acce952bSliubo 3833acce952bSliubo btrfs_destroy_delayed_refs(t, root); 3834acce952bSliubo 3835acce952bSliubo btrfs_block_rsv_release(root, 3836acce952bSliubo &root->fs_info->trans_block_rsv, 3837acce952bSliubo t->dirty_pages.dirty_bytes); 3838acce952bSliubo 3839acce952bSliubo /* FIXME: cleanup wait for commit */ 3840acce952bSliubo t->in_commit = 1; 3841acce952bSliubo t->blocked = 1; 384266657b31SJosef Bacik smp_mb(); 3843acce952bSliubo if (waitqueue_active(&root->fs_info->transaction_blocked_wait)) 3844acce952bSliubo wake_up(&root->fs_info->transaction_blocked_wait); 3845acce952bSliubo 3846acce952bSliubo t->blocked = 0; 384766657b31SJosef Bacik smp_mb(); 3848acce952bSliubo if (waitqueue_active(&root->fs_info->transaction_wait)) 3849acce952bSliubo wake_up(&root->fs_info->transaction_wait); 3850acce952bSliubo 3851acce952bSliubo t->commit_done = 1; 385266657b31SJosef Bacik smp_mb(); 3853acce952bSliubo if (waitqueue_active(&t->commit_wait)) 3854acce952bSliubo wake_up(&t->commit_wait); 3855acce952bSliubo 385667cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 385767cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 385867cde344SMiao Xie 3859acce952bSliubo btrfs_destroy_pending_snapshots(t); 3860acce952bSliubo 3861acce952bSliubo btrfs_destroy_delalloc_inodes(root); 3862acce952bSliubo 3863a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3864acce952bSliubo root->fs_info->running_transaction = NULL; 3865a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3866acce952bSliubo 3867acce952bSliubo btrfs_destroy_marked_extents(root, &t->dirty_pages, 3868acce952bSliubo EXTENT_DIRTY); 3869acce952bSliubo 3870acce952bSliubo btrfs_destroy_pinned_extent(root, 3871acce952bSliubo root->fs_info->pinned_extents); 3872acce952bSliubo 387313c5a93eSJosef Bacik atomic_set(&t->use_count, 0); 3874acce952bSliubo list_del_init(&t->list); 3875acce952bSliubo memset(t, 0, sizeof(*t)); 3876acce952bSliubo kmem_cache_free(btrfs_transaction_cachep, t); 3877acce952bSliubo } 3878acce952bSliubo 3879a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3880a4abeea4SJosef Bacik root->fs_info->trans_no_join = 0; 3881a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3882acce952bSliubo mutex_unlock(&root->fs_info->transaction_kthread_mutex); 3883acce952bSliubo 3884acce952bSliubo return 0; 3885acce952bSliubo } 3886acce952bSliubo 3887d1310b2eSChris Mason static struct extent_io_ops btree_extent_io_ops = { 3888ce9adaa5SChris Mason .readpage_end_io_hook = btree_readpage_end_io_hook, 38894bb31e92SArne Jansen .readpage_io_failed_hook = btree_io_failed_hook, 38900b86a832SChris Mason .submit_bio_hook = btree_submit_bio_hook, 3891239b14b3SChris Mason /* note we're sharing with inode.c for the merge bio hook */ 3892239b14b3SChris Mason .merge_bio_hook = btrfs_merge_bio_hook, 38930da5468fSChris Mason }; 3894