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> 336463fe58SStefan Behrens #include <linux/uuid.h> 347e75bf3fSDavid Sterba #include <asm/unaligned.h> 354b4e25f2SChris Mason #include "compat.h" 36eb60ceacSChris Mason #include "ctree.h" 37eb60ceacSChris Mason #include "disk-io.h" 38e089f05cSChris Mason #include "transaction.h" 390f7d52f4SChris Mason #include "btrfs_inode.h" 400b86a832SChris Mason #include "volumes.h" 41db94535dSChris Mason #include "print-tree.h" 428b712842SChris Mason #include "async-thread.h" 43925baeddSChris Mason #include "locking.h" 44e02119d5SChris Mason #include "tree-log.h" 45fa9c0d79SChris Mason #include "free-space-cache.h" 46581bb050SLi Zefan #include "inode-map.h" 4721adbd5cSStefan Behrens #include "check-integrity.h" 48606686eeSJosef Bacik #include "rcu-string.h" 498dabb742SStefan Behrens #include "dev-replace.h" 5053b381b3SDavid Woodhouse #include "raid56.h" 51eb60ceacSChris Mason 52de0022b9SJosef Bacik #ifdef CONFIG_X86 53de0022b9SJosef Bacik #include <asm/cpufeature.h> 54de0022b9SJosef Bacik #endif 55de0022b9SJosef Bacik 56d1310b2eSChris Mason static struct extent_io_ops btree_extent_io_ops; 578b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work); 584df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root); 59fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 60acce952bSliubo int read_only); 61569e0f35SJosef Bacik static void btrfs_destroy_ordered_operations(struct btrfs_transaction *t, 62569e0f35SJosef Bacik struct btrfs_root *root); 63143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root); 64acce952bSliubo static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 65acce952bSliubo struct btrfs_root *root); 66aec8030aSMiao Xie static void btrfs_evict_pending_snapshots(struct btrfs_transaction *t); 67143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); 68acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 69acce952bSliubo struct extent_io_tree *dirty_pages, 70acce952bSliubo int mark); 71acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 72acce952bSliubo struct extent_io_tree *pinned_extents); 7348a3b636SEric Sandeen static int btrfs_cleanup_transaction(struct btrfs_root *root); 7448a3b636SEric Sandeen static void btrfs_error_commit_super(struct btrfs_root *root); 75ce9adaa5SChris Mason 76d352ac68SChris Mason /* 77d352ac68SChris Mason * end_io_wq structs are used to do processing in task context when an IO is 78d352ac68SChris Mason * complete. This is used during reads to verify checksums, and it is used 79d352ac68SChris Mason * by writes to insert metadata for new file extents after IO is complete. 80d352ac68SChris Mason */ 81ce9adaa5SChris Mason struct end_io_wq { 82ce9adaa5SChris Mason struct bio *bio; 83ce9adaa5SChris Mason bio_end_io_t *end_io; 84ce9adaa5SChris Mason void *private; 85ce9adaa5SChris Mason struct btrfs_fs_info *info; 86ce9adaa5SChris Mason int error; 8722c59948SChris Mason int metadata; 88ce9adaa5SChris Mason struct list_head list; 898b712842SChris Mason struct btrfs_work work; 90ce9adaa5SChris Mason }; 910da5468fSChris Mason 92d352ac68SChris Mason /* 93d352ac68SChris Mason * async submit bios are used to offload expensive checksumming 94d352ac68SChris Mason * onto the worker threads. They checksum file and metadata bios 95d352ac68SChris Mason * just before they are sent down the IO stack. 96d352ac68SChris Mason */ 9744b8bd7eSChris Mason struct async_submit_bio { 9844b8bd7eSChris Mason struct inode *inode; 9944b8bd7eSChris Mason struct bio *bio; 10044b8bd7eSChris Mason struct list_head list; 1014a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start; 1024a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done; 10344b8bd7eSChris Mason int rw; 10444b8bd7eSChris Mason int mirror_num; 105c8b97818SChris Mason unsigned long bio_flags; 106eaf25d93SChris Mason /* 107eaf25d93SChris Mason * bio_offset is optional, can be used if the pages in the bio 108eaf25d93SChris Mason * can't tell us where in the file the bio should go 109eaf25d93SChris Mason */ 110eaf25d93SChris Mason u64 bio_offset; 1118b712842SChris Mason struct btrfs_work work; 11279787eaaSJeff Mahoney int error; 11344b8bd7eSChris Mason }; 11444b8bd7eSChris Mason 11585d4e461SChris Mason /* 11685d4e461SChris Mason * Lockdep class keys for extent_buffer->lock's in this root. For a given 11785d4e461SChris Mason * eb, the lockdep key is determined by the btrfs_root it belongs to and 11885d4e461SChris Mason * the level the eb occupies in the tree. 1194008c04aSChris Mason * 12085d4e461SChris Mason * Different roots are used for different purposes and may nest inside each 12185d4e461SChris Mason * other and they require separate keysets. As lockdep keys should be 12285d4e461SChris Mason * static, assign keysets according to the purpose of the root as indicated 12385d4e461SChris Mason * by btrfs_root->objectid. This ensures that all special purpose roots 12485d4e461SChris Mason * have separate keysets. 1254008c04aSChris Mason * 12685d4e461SChris Mason * Lock-nesting across peer nodes is always done with the immediate parent 12785d4e461SChris Mason * node locked thus preventing deadlock. As lockdep doesn't know this, use 12885d4e461SChris Mason * subclass to avoid triggering lockdep warning in such cases. 1294008c04aSChris Mason * 13085d4e461SChris Mason * The key is set by the readpage_end_io_hook after the buffer has passed 13185d4e461SChris Mason * csum validation but before the pages are unlocked. It is also set by 13285d4e461SChris Mason * btrfs_init_new_buffer on freshly allocated blocks. 13385d4e461SChris Mason * 13485d4e461SChris Mason * We also add a check to make sure the highest level of the tree is the 13585d4e461SChris Mason * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code 13685d4e461SChris Mason * needs update as well. 1374008c04aSChris Mason */ 1384008c04aSChris Mason #ifdef CONFIG_DEBUG_LOCK_ALLOC 1394008c04aSChris Mason # if BTRFS_MAX_LEVEL != 8 1404008c04aSChris Mason # error 1414008c04aSChris Mason # endif 14285d4e461SChris Mason 14385d4e461SChris Mason static struct btrfs_lockdep_keyset { 14485d4e461SChris Mason u64 id; /* root objectid */ 14585d4e461SChris Mason const char *name_stem; /* lock name stem */ 14685d4e461SChris Mason char names[BTRFS_MAX_LEVEL + 1][20]; 14785d4e461SChris Mason struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; 14885d4e461SChris Mason } btrfs_lockdep_keysets[] = { 14985d4e461SChris Mason { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, 15085d4e461SChris Mason { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, 15185d4e461SChris Mason { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, 15285d4e461SChris Mason { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, 15385d4e461SChris Mason { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, 15485d4e461SChris Mason { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, 15585d4e461SChris Mason { .id = BTRFS_ORPHAN_OBJECTID, .name_stem = "orphan" }, 15685d4e461SChris Mason { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, 15785d4e461SChris Mason { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, 15885d4e461SChris Mason { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, 15985d4e461SChris Mason { .id = 0, .name_stem = "tree" }, 1604008c04aSChris Mason }; 16185d4e461SChris Mason 16285d4e461SChris Mason void __init btrfs_init_lockdep(void) 16385d4e461SChris Mason { 16485d4e461SChris Mason int i, j; 16585d4e461SChris Mason 16685d4e461SChris Mason /* initialize lockdep class names */ 16785d4e461SChris Mason for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { 16885d4e461SChris Mason struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; 16985d4e461SChris Mason 17085d4e461SChris Mason for (j = 0; j < ARRAY_SIZE(ks->names); j++) 17185d4e461SChris Mason snprintf(ks->names[j], sizeof(ks->names[j]), 17285d4e461SChris Mason "btrfs-%s-%02d", ks->name_stem, j); 17385d4e461SChris Mason } 17485d4e461SChris Mason } 17585d4e461SChris Mason 17685d4e461SChris Mason void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, 17785d4e461SChris Mason int level) 17885d4e461SChris Mason { 17985d4e461SChris Mason struct btrfs_lockdep_keyset *ks; 18085d4e461SChris Mason 18185d4e461SChris Mason BUG_ON(level >= ARRAY_SIZE(ks->keys)); 18285d4e461SChris Mason 18385d4e461SChris Mason /* find the matching keyset, id 0 is the default entry */ 18485d4e461SChris Mason for (ks = btrfs_lockdep_keysets; ks->id; ks++) 18585d4e461SChris Mason if (ks->id == objectid) 18685d4e461SChris Mason break; 18785d4e461SChris Mason 18885d4e461SChris Mason lockdep_set_class_and_name(&eb->lock, 18985d4e461SChris Mason &ks->keys[level], ks->names[level]); 19085d4e461SChris Mason } 19185d4e461SChris Mason 1924008c04aSChris Mason #endif 1934008c04aSChris Mason 194d352ac68SChris Mason /* 195d352ac68SChris Mason * extents on the btree inode are pretty simple, there's one extent 196d352ac68SChris Mason * that covers the entire device 197d352ac68SChris Mason */ 198b2950863SChristoph Hellwig static struct extent_map *btree_get_extent(struct inode *inode, 199306e16ceSDavid Sterba struct page *page, size_t pg_offset, u64 start, u64 len, 2005f39d397SChris Mason int create) 2015f39d397SChris Mason { 2025f39d397SChris Mason struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; 2035f39d397SChris Mason struct extent_map *em; 2045f39d397SChris Mason int ret; 2055f39d397SChris Mason 206890871beSChris Mason read_lock(&em_tree->lock); 207d1310b2eSChris Mason em = lookup_extent_mapping(em_tree, start, len); 208a061fc8dSChris Mason if (em) { 209a061fc8dSChris Mason em->bdev = 210a061fc8dSChris Mason BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 211890871beSChris Mason read_unlock(&em_tree->lock); 2125f39d397SChris Mason goto out; 213a061fc8dSChris Mason } 214890871beSChris Mason read_unlock(&em_tree->lock); 2157b13b7b1SChris Mason 216172ddd60SDavid Sterba em = alloc_extent_map(); 2175f39d397SChris Mason if (!em) { 2185f39d397SChris Mason em = ERR_PTR(-ENOMEM); 2195f39d397SChris Mason goto out; 2205f39d397SChris Mason } 2215f39d397SChris Mason em->start = 0; 2220afbaf8cSChris Mason em->len = (u64)-1; 223c8b97818SChris Mason em->block_len = (u64)-1; 2245f39d397SChris Mason em->block_start = 0; 225a061fc8dSChris Mason em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 226d1310b2eSChris Mason 227890871beSChris Mason write_lock(&em_tree->lock); 22809a2a8f9SJosef Bacik ret = add_extent_mapping(em_tree, em, 0); 2295f39d397SChris Mason if (ret == -EEXIST) { 2305f39d397SChris Mason free_extent_map(em); 2317b13b7b1SChris Mason em = lookup_extent_mapping(em_tree, start, len); 232b4f359abSTsutomu Itoh if (!em) 2330433f20dSTsutomu Itoh em = ERR_PTR(-EIO); 2345f39d397SChris Mason } else if (ret) { 2357b13b7b1SChris Mason free_extent_map(em); 2360433f20dSTsutomu Itoh em = ERR_PTR(ret); 2375f39d397SChris Mason } 238890871beSChris Mason write_unlock(&em_tree->lock); 2397b13b7b1SChris Mason 2405f39d397SChris Mason out: 2415f39d397SChris Mason return em; 2425f39d397SChris Mason } 2435f39d397SChris Mason 244b0496686SLiu Bo u32 btrfs_csum_data(char *data, u32 seed, size_t len) 24519c00ddcSChris Mason { 246163e783eSDavid Woodhouse return crc32c(seed, data, len); 24719c00ddcSChris Mason } 24819c00ddcSChris Mason 24919c00ddcSChris Mason void btrfs_csum_final(u32 crc, char *result) 25019c00ddcSChris Mason { 2517e75bf3fSDavid Sterba put_unaligned_le32(~crc, result); 25219c00ddcSChris Mason } 25319c00ddcSChris Mason 254d352ac68SChris Mason /* 255d352ac68SChris Mason * compute the csum for a btree block, and either verify it or write it 256d352ac68SChris Mason * into the csum field of the block. 257d352ac68SChris Mason */ 25819c00ddcSChris Mason static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, 25919c00ddcSChris Mason int verify) 26019c00ddcSChris Mason { 2616c41761fSDavid Sterba u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy); 262607d432dSJosef Bacik char *result = NULL; 26319c00ddcSChris Mason unsigned long len; 26419c00ddcSChris Mason unsigned long cur_len; 26519c00ddcSChris Mason unsigned long offset = BTRFS_CSUM_SIZE; 26619c00ddcSChris Mason char *kaddr; 26719c00ddcSChris Mason unsigned long map_start; 26819c00ddcSChris Mason unsigned long map_len; 26919c00ddcSChris Mason int err; 27019c00ddcSChris Mason u32 crc = ~(u32)0; 271607d432dSJosef Bacik unsigned long inline_result; 27219c00ddcSChris Mason 27319c00ddcSChris Mason len = buf->len - offset; 27419c00ddcSChris Mason while (len > 0) { 27519c00ddcSChris Mason err = map_private_extent_buffer(buf, offset, 32, 276a6591715SChris Mason &kaddr, &map_start, &map_len); 277d397712bSChris Mason if (err) 27819c00ddcSChris Mason return 1; 27919c00ddcSChris Mason cur_len = min(len, map_len - (offset - map_start)); 280b0496686SLiu Bo crc = btrfs_csum_data(kaddr + offset - map_start, 28119c00ddcSChris Mason crc, cur_len); 28219c00ddcSChris Mason len -= cur_len; 28319c00ddcSChris Mason offset += cur_len; 28419c00ddcSChris Mason } 285607d432dSJosef Bacik if (csum_size > sizeof(inline_result)) { 286607d432dSJosef Bacik result = kzalloc(csum_size * sizeof(char), GFP_NOFS); 287607d432dSJosef Bacik if (!result) 288607d432dSJosef Bacik return 1; 289607d432dSJosef Bacik } else { 290607d432dSJosef Bacik result = (char *)&inline_result; 291607d432dSJosef Bacik } 292607d432dSJosef Bacik 29319c00ddcSChris Mason btrfs_csum_final(crc, result); 29419c00ddcSChris Mason 29519c00ddcSChris Mason if (verify) { 296607d432dSJosef Bacik if (memcmp_extent_buffer(buf, result, 0, csum_size)) { 297e4204dedSChris Mason u32 val; 298e4204dedSChris Mason u32 found = 0; 299607d432dSJosef Bacik memcpy(&found, result, csum_size); 300e4204dedSChris Mason 301607d432dSJosef Bacik read_extent_buffer(buf, &val, 0, csum_size); 3027a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs: %s checksum verify " 303193f284dSChris Mason "failed on %llu wanted %X found %X " 304193f284dSChris Mason "level %d\n", 30519c00ddcSChris Mason root->fs_info->sb->s_id, 306193f284dSChris Mason (unsigned long long)buf->start, val, found, 307193f284dSChris Mason btrfs_header_level(buf)); 308607d432dSJosef Bacik if (result != (char *)&inline_result) 309607d432dSJosef Bacik kfree(result); 31019c00ddcSChris Mason return 1; 31119c00ddcSChris Mason } 31219c00ddcSChris Mason } else { 313607d432dSJosef Bacik write_extent_buffer(buf, result, 0, csum_size); 31419c00ddcSChris Mason } 315607d432dSJosef Bacik if (result != (char *)&inline_result) 316607d432dSJosef Bacik kfree(result); 31719c00ddcSChris Mason return 0; 31819c00ddcSChris Mason } 31919c00ddcSChris Mason 320d352ac68SChris Mason /* 321d352ac68SChris Mason * we can't consider a given block up to date unless the transid of the 322d352ac68SChris Mason * block matches the transid in the parent node's pointer. This is how we 323d352ac68SChris Mason * detect blocks that either didn't get written at all or got written 324d352ac68SChris Mason * in the wrong place. 325d352ac68SChris Mason */ 3261259ab75SChris Mason static int verify_parent_transid(struct extent_io_tree *io_tree, 327b9fab919SChris Mason struct extent_buffer *eb, u64 parent_transid, 328b9fab919SChris Mason int atomic) 3291259ab75SChris Mason { 3302ac55d41SJosef Bacik struct extent_state *cached_state = NULL; 3311259ab75SChris Mason int ret; 3321259ab75SChris Mason 3331259ab75SChris Mason if (!parent_transid || btrfs_header_generation(eb) == parent_transid) 3341259ab75SChris Mason return 0; 3351259ab75SChris Mason 336b9fab919SChris Mason if (atomic) 337b9fab919SChris Mason return -EAGAIN; 338b9fab919SChris Mason 3392ac55d41SJosef Bacik lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, 340d0082371SJeff Mahoney 0, &cached_state); 3410b32f4bbSJosef Bacik if (extent_buffer_uptodate(eb) && 3421259ab75SChris Mason btrfs_header_generation(eb) == parent_transid) { 3431259ab75SChris Mason ret = 0; 3441259ab75SChris Mason goto out; 3451259ab75SChris Mason } 3467a36ddecSDavid Sterba printk_ratelimited("parent transid verify failed on %llu wanted %llu " 347193f284dSChris Mason "found %llu\n", 3481259ab75SChris Mason (unsigned long long)eb->start, 3491259ab75SChris Mason (unsigned long long)parent_transid, 3501259ab75SChris Mason (unsigned long long)btrfs_header_generation(eb)); 3511259ab75SChris Mason ret = 1; 3520b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 35333958dc6SChris Mason out: 3542ac55d41SJosef Bacik unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, 3552ac55d41SJosef Bacik &cached_state, GFP_NOFS); 3561259ab75SChris Mason return ret; 3571259ab75SChris Mason } 3581259ab75SChris Mason 359d352ac68SChris Mason /* 3601104a885SDavid Sterba * Return 0 if the superblock checksum type matches the checksum value of that 3611104a885SDavid Sterba * algorithm. Pass the raw disk superblock data. 3621104a885SDavid Sterba */ 3631104a885SDavid Sterba static int btrfs_check_super_csum(char *raw_disk_sb) 3641104a885SDavid Sterba { 3651104a885SDavid Sterba struct btrfs_super_block *disk_sb = 3661104a885SDavid Sterba (struct btrfs_super_block *)raw_disk_sb; 3671104a885SDavid Sterba u16 csum_type = btrfs_super_csum_type(disk_sb); 3681104a885SDavid Sterba int ret = 0; 3691104a885SDavid Sterba 3701104a885SDavid Sterba if (csum_type == BTRFS_CSUM_TYPE_CRC32) { 3711104a885SDavid Sterba u32 crc = ~(u32)0; 3721104a885SDavid Sterba const int csum_size = sizeof(crc); 3731104a885SDavid Sterba char result[csum_size]; 3741104a885SDavid Sterba 3751104a885SDavid Sterba /* 3761104a885SDavid Sterba * The super_block structure does not span the whole 3771104a885SDavid Sterba * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space 3781104a885SDavid Sterba * is filled with zeros and is included in the checkum. 3791104a885SDavid Sterba */ 3801104a885SDavid Sterba crc = btrfs_csum_data(raw_disk_sb + BTRFS_CSUM_SIZE, 3811104a885SDavid Sterba crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); 3821104a885SDavid Sterba btrfs_csum_final(crc, result); 3831104a885SDavid Sterba 3841104a885SDavid Sterba if (memcmp(raw_disk_sb, result, csum_size)) 3851104a885SDavid Sterba ret = 1; 3861104a885SDavid Sterba } 3871104a885SDavid Sterba 3881104a885SDavid Sterba if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) { 3891104a885SDavid Sterba printk(KERN_ERR "btrfs: unsupported checksum algorithm %u\n", 3901104a885SDavid Sterba csum_type); 3911104a885SDavid Sterba ret = 1; 3921104a885SDavid Sterba } 3931104a885SDavid Sterba 3941104a885SDavid Sterba return ret; 3951104a885SDavid Sterba } 3961104a885SDavid Sterba 3971104a885SDavid Sterba /* 398d352ac68SChris Mason * helper to read a given tree block, doing retries as required when 399d352ac68SChris Mason * the checksums don't match and we have alternate mirrors to try. 400d352ac68SChris Mason */ 401f188591eSChris Mason static int btree_read_extent_buffer_pages(struct btrfs_root *root, 402f188591eSChris Mason struct extent_buffer *eb, 403ca7a79adSChris Mason u64 start, u64 parent_transid) 404f188591eSChris Mason { 405f188591eSChris Mason struct extent_io_tree *io_tree; 406ea466794SJosef Bacik int failed = 0; 407f188591eSChris Mason int ret; 408f188591eSChris Mason int num_copies = 0; 409f188591eSChris Mason int mirror_num = 0; 410ea466794SJosef Bacik int failed_mirror = 0; 411f188591eSChris Mason 412a826d6dcSJosef Bacik clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 413f188591eSChris Mason io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; 414f188591eSChris Mason while (1) { 415bb82ab88SArne Jansen ret = read_extent_buffer_pages(io_tree, eb, start, 416bb82ab88SArne Jansen WAIT_COMPLETE, 417f188591eSChris Mason btree_get_extent, mirror_num); 418256dd1bbSStefan Behrens if (!ret) { 419256dd1bbSStefan Behrens if (!verify_parent_transid(io_tree, eb, 420b9fab919SChris Mason parent_transid, 0)) 421ea466794SJosef Bacik break; 422256dd1bbSStefan Behrens else 423256dd1bbSStefan Behrens ret = -EIO; 424256dd1bbSStefan Behrens } 425d397712bSChris Mason 426a826d6dcSJosef Bacik /* 427a826d6dcSJosef Bacik * This buffer's crc is fine, but its contents are corrupted, so 428a826d6dcSJosef Bacik * there is no reason to read the other copies, they won't be 429a826d6dcSJosef Bacik * any less wrong. 430a826d6dcSJosef Bacik */ 431a826d6dcSJosef Bacik if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) 432ea466794SJosef Bacik break; 433ea466794SJosef Bacik 4345d964051SStefan Behrens num_copies = btrfs_num_copies(root->fs_info, 435f188591eSChris Mason eb->start, eb->len); 4364235298eSChris Mason if (num_copies == 1) 437ea466794SJosef Bacik break; 4384235298eSChris Mason 4395cf1ab56SJosef Bacik if (!failed_mirror) { 4405cf1ab56SJosef Bacik failed = 1; 4415cf1ab56SJosef Bacik failed_mirror = eb->read_mirror; 4425cf1ab56SJosef Bacik } 4435cf1ab56SJosef Bacik 444f188591eSChris Mason mirror_num++; 445ea466794SJosef Bacik if (mirror_num == failed_mirror) 446ea466794SJosef Bacik mirror_num++; 447ea466794SJosef Bacik 4484235298eSChris Mason if (mirror_num > num_copies) 449ea466794SJosef Bacik break; 450f188591eSChris Mason } 451ea466794SJosef Bacik 452c0901581SStefan Behrens if (failed && !ret && failed_mirror) 453ea466794SJosef Bacik repair_eb_io_failure(root, eb, failed_mirror); 454ea466794SJosef Bacik 455ea466794SJosef Bacik return ret; 456f188591eSChris Mason } 45719c00ddcSChris Mason 458d352ac68SChris Mason /* 459d397712bSChris Mason * checksum a dirty tree block before IO. This has extra checks to make sure 460d397712bSChris Mason * we only fill in the checksum field in the first page of a multi-page block 461d352ac68SChris Mason */ 462d397712bSChris Mason 463b2950863SChristoph Hellwig static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) 46419c00ddcSChris Mason { 465d1310b2eSChris Mason struct extent_io_tree *tree; 4664eee4fa4SMiao Xie u64 start = page_offset(page); 46719c00ddcSChris Mason u64 found_start; 46819c00ddcSChris Mason struct extent_buffer *eb; 469f188591eSChris Mason 470d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 47119c00ddcSChris Mason 4724f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 4734f2de97aSJosef Bacik if (page != eb->pages[0]) 4744f2de97aSJosef Bacik return 0; 47519c00ddcSChris Mason found_start = btrfs_header_bytenr(eb); 47619c00ddcSChris Mason if (found_start != start) { 47755c69072SChris Mason WARN_ON(1); 4784f2de97aSJosef Bacik return 0; 47955c69072SChris Mason } 48055c69072SChris Mason if (!PageUptodate(page)) { 48155c69072SChris Mason WARN_ON(1); 4824f2de97aSJosef Bacik return 0; 48319c00ddcSChris Mason } 48419c00ddcSChris Mason csum_tree_block(root, eb, 0); 48519c00ddcSChris Mason return 0; 48619c00ddcSChris Mason } 48719c00ddcSChris Mason 4882b82032cSYan Zheng static int check_tree_block_fsid(struct btrfs_root *root, 4892b82032cSYan Zheng struct extent_buffer *eb) 4902b82032cSYan Zheng { 4912b82032cSYan Zheng struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; 4922b82032cSYan Zheng u8 fsid[BTRFS_UUID_SIZE]; 4932b82032cSYan Zheng int ret = 1; 4942b82032cSYan Zheng 4952b82032cSYan Zheng read_extent_buffer(eb, fsid, (unsigned long)btrfs_header_fsid(eb), 4962b82032cSYan Zheng BTRFS_FSID_SIZE); 4972b82032cSYan Zheng while (fs_devices) { 4982b82032cSYan Zheng if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { 4992b82032cSYan Zheng ret = 0; 5002b82032cSYan Zheng break; 5012b82032cSYan Zheng } 5022b82032cSYan Zheng fs_devices = fs_devices->seed; 5032b82032cSYan Zheng } 5042b82032cSYan Zheng return ret; 5052b82032cSYan Zheng } 5062b82032cSYan Zheng 507a826d6dcSJosef Bacik #define CORRUPT(reason, eb, root, slot) \ 508a826d6dcSJosef Bacik printk(KERN_CRIT "btrfs: corrupt leaf, %s: block=%llu," \ 509a826d6dcSJosef Bacik "root=%llu, slot=%d\n", reason, \ 510a826d6dcSJosef Bacik (unsigned long long)btrfs_header_bytenr(eb), \ 511a826d6dcSJosef Bacik (unsigned long long)root->objectid, slot) 512a826d6dcSJosef Bacik 513a826d6dcSJosef Bacik static noinline int check_leaf(struct btrfs_root *root, 514a826d6dcSJosef Bacik struct extent_buffer *leaf) 515a826d6dcSJosef Bacik { 516a826d6dcSJosef Bacik struct btrfs_key key; 517a826d6dcSJosef Bacik struct btrfs_key leaf_key; 518a826d6dcSJosef Bacik u32 nritems = btrfs_header_nritems(leaf); 519a826d6dcSJosef Bacik int slot; 520a826d6dcSJosef Bacik 521a826d6dcSJosef Bacik if (nritems == 0) 522a826d6dcSJosef Bacik return 0; 523a826d6dcSJosef Bacik 524a826d6dcSJosef Bacik /* Check the 0 item */ 525a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != 526a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 527a826d6dcSJosef Bacik CORRUPT("invalid item offset size pair", leaf, root, 0); 528a826d6dcSJosef Bacik return -EIO; 529a826d6dcSJosef Bacik } 530a826d6dcSJosef Bacik 531a826d6dcSJosef Bacik /* 532a826d6dcSJosef Bacik * Check to make sure each items keys are in the correct order and their 533a826d6dcSJosef Bacik * offsets make sense. We only have to loop through nritems-1 because 534a826d6dcSJosef Bacik * we check the current slot against the next slot, which verifies the 535a826d6dcSJosef Bacik * next slot's offset+size makes sense and that the current's slot 536a826d6dcSJosef Bacik * offset is correct. 537a826d6dcSJosef Bacik */ 538a826d6dcSJosef Bacik for (slot = 0; slot < nritems - 1; slot++) { 539a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &leaf_key, slot); 540a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &key, slot + 1); 541a826d6dcSJosef Bacik 542a826d6dcSJosef Bacik /* Make sure the keys are in the right order */ 543a826d6dcSJosef Bacik if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { 544a826d6dcSJosef Bacik CORRUPT("bad key order", leaf, root, slot); 545a826d6dcSJosef Bacik return -EIO; 546a826d6dcSJosef Bacik } 547a826d6dcSJosef Bacik 548a826d6dcSJosef Bacik /* 549a826d6dcSJosef Bacik * Make sure the offset and ends are right, remember that the 550a826d6dcSJosef Bacik * item data starts at the end of the leaf and grows towards the 551a826d6dcSJosef Bacik * front. 552a826d6dcSJosef Bacik */ 553a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, slot) != 554a826d6dcSJosef Bacik btrfs_item_end_nr(leaf, slot + 1)) { 555a826d6dcSJosef Bacik CORRUPT("slot offset bad", leaf, root, slot); 556a826d6dcSJosef Bacik return -EIO; 557a826d6dcSJosef Bacik } 558a826d6dcSJosef Bacik 559a826d6dcSJosef Bacik /* 560a826d6dcSJosef Bacik * Check to make sure that we don't point outside of the leaf, 561a826d6dcSJosef Bacik * just incase all the items are consistent to eachother, but 562a826d6dcSJosef Bacik * all point outside of the leaf. 563a826d6dcSJosef Bacik */ 564a826d6dcSJosef Bacik if (btrfs_item_end_nr(leaf, slot) > 565a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 566a826d6dcSJosef Bacik CORRUPT("slot end outside of leaf", leaf, root, slot); 567a826d6dcSJosef Bacik return -EIO; 568a826d6dcSJosef Bacik } 569a826d6dcSJosef Bacik } 570a826d6dcSJosef Bacik 571a826d6dcSJosef Bacik return 0; 572a826d6dcSJosef Bacik } 573a826d6dcSJosef Bacik 574b2950863SChristoph Hellwig static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end, 5755cf1ab56SJosef Bacik struct extent_state *state, int mirror) 576ce9adaa5SChris Mason { 577ce9adaa5SChris Mason struct extent_io_tree *tree; 578ce9adaa5SChris Mason u64 found_start; 579ce9adaa5SChris Mason int found_level; 580ce9adaa5SChris Mason struct extent_buffer *eb; 581ce9adaa5SChris Mason struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 582f188591eSChris Mason int ret = 0; 583727011e0SChris Mason int reads_done; 584ce9adaa5SChris Mason 585ce9adaa5SChris Mason if (!page->private) 586ce9adaa5SChris Mason goto out; 587d397712bSChris Mason 588727011e0SChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 5894f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 590d397712bSChris Mason 5910b32f4bbSJosef Bacik /* the pending IO might have been the only thing that kept this buffer 5920b32f4bbSJosef Bacik * in memory. Make sure we have a ref for all this other checks 5930b32f4bbSJosef Bacik */ 5940b32f4bbSJosef Bacik extent_buffer_get(eb); 5950b32f4bbSJosef Bacik 5960b32f4bbSJosef Bacik reads_done = atomic_dec_and_test(&eb->io_pages); 597727011e0SChris Mason if (!reads_done) 598727011e0SChris Mason goto err; 599f188591eSChris Mason 6005cf1ab56SJosef Bacik eb->read_mirror = mirror; 601ea466794SJosef Bacik if (test_bit(EXTENT_BUFFER_IOERR, &eb->bflags)) { 602ea466794SJosef Bacik ret = -EIO; 603ea466794SJosef Bacik goto err; 604ea466794SJosef Bacik } 605ea466794SJosef Bacik 606ce9adaa5SChris Mason found_start = btrfs_header_bytenr(eb); 607727011e0SChris Mason if (found_start != eb->start) { 6087a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs bad tree block start " 609193f284dSChris Mason "%llu %llu\n", 610a1b32a59SChris Mason (unsigned long long)found_start, 611a1b32a59SChris Mason (unsigned long long)eb->start); 612f188591eSChris Mason ret = -EIO; 613ce9adaa5SChris Mason goto err; 614ce9adaa5SChris Mason } 6152b82032cSYan Zheng if (check_tree_block_fsid(root, eb)) { 6167a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs bad fsid on block %llu\n", 617d397712bSChris Mason (unsigned long long)eb->start); 6181259ab75SChris Mason ret = -EIO; 6191259ab75SChris Mason goto err; 6201259ab75SChris Mason } 621ce9adaa5SChris Mason found_level = btrfs_header_level(eb); 6221c24c3ceSJosef Bacik if (found_level >= BTRFS_MAX_LEVEL) { 6231c24c3ceSJosef Bacik btrfs_info(root->fs_info, "bad tree block level %d\n", 6241c24c3ceSJosef Bacik (int)btrfs_header_level(eb)); 6251c24c3ceSJosef Bacik ret = -EIO; 6261c24c3ceSJosef Bacik goto err; 6271c24c3ceSJosef Bacik } 628ce9adaa5SChris Mason 62985d4e461SChris Mason btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), 63085d4e461SChris Mason eb, found_level); 6314008c04aSChris Mason 632ce9adaa5SChris Mason ret = csum_tree_block(root, eb, 1); 633a826d6dcSJosef Bacik if (ret) { 634f188591eSChris Mason ret = -EIO; 635a826d6dcSJosef Bacik goto err; 636a826d6dcSJosef Bacik } 637a826d6dcSJosef Bacik 638a826d6dcSJosef Bacik /* 639a826d6dcSJosef Bacik * If this is a leaf block and it is corrupt, set the corrupt bit so 640a826d6dcSJosef Bacik * that we don't try and read the other copies of this block, just 641a826d6dcSJosef Bacik * return -EIO. 642a826d6dcSJosef Bacik */ 643a826d6dcSJosef Bacik if (found_level == 0 && check_leaf(root, eb)) { 644a826d6dcSJosef Bacik set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 645a826d6dcSJosef Bacik ret = -EIO; 646a826d6dcSJosef Bacik } 647ce9adaa5SChris Mason 6480b32f4bbSJosef Bacik if (!ret) 6490b32f4bbSJosef Bacik set_extent_buffer_uptodate(eb); 650ce9adaa5SChris Mason err: 65179fb65a1SJosef Bacik if (reads_done && 65279fb65a1SJosef Bacik test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 6534bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, ret); 6544bb31e92SArne Jansen 65553b381b3SDavid Woodhouse if (ret) { 65653b381b3SDavid Woodhouse /* 65753b381b3SDavid Woodhouse * our io error hook is going to dec the io pages 65853b381b3SDavid Woodhouse * again, we have to make sure it has something 65953b381b3SDavid Woodhouse * to decrement 66053b381b3SDavid Woodhouse */ 66153b381b3SDavid Woodhouse atomic_inc(&eb->io_pages); 6620b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 66353b381b3SDavid Woodhouse } 6640b32f4bbSJosef Bacik free_extent_buffer(eb); 665ce9adaa5SChris Mason out: 666f188591eSChris Mason return ret; 667ce9adaa5SChris Mason } 668ce9adaa5SChris Mason 669ea466794SJosef Bacik static int btree_io_failed_hook(struct page *page, int failed_mirror) 6704bb31e92SArne Jansen { 6714bb31e92SArne Jansen struct extent_buffer *eb; 6724bb31e92SArne Jansen struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 6734bb31e92SArne Jansen 6744f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 675ea466794SJosef Bacik set_bit(EXTENT_BUFFER_IOERR, &eb->bflags); 6765cf1ab56SJosef Bacik eb->read_mirror = failed_mirror; 67753b381b3SDavid Woodhouse atomic_dec(&eb->io_pages); 678ea466794SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 6794bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, -EIO); 6804bb31e92SArne Jansen return -EIO; /* we fixed nothing */ 6814bb31e92SArne Jansen } 6824bb31e92SArne Jansen 683ce9adaa5SChris Mason static void end_workqueue_bio(struct bio *bio, int err) 684ce9adaa5SChris Mason { 685ce9adaa5SChris Mason struct end_io_wq *end_io_wq = bio->bi_private; 686ce9adaa5SChris Mason struct btrfs_fs_info *fs_info; 687ce9adaa5SChris Mason 688ce9adaa5SChris Mason fs_info = end_io_wq->info; 689ce9adaa5SChris Mason end_io_wq->error = err; 6908b712842SChris Mason end_io_wq->work.func = end_workqueue_fn; 6918b712842SChris Mason end_io_wq->work.flags = 0; 692d20f7043SChris Mason 6937b6d91daSChristoph Hellwig if (bio->bi_rw & REQ_WRITE) { 69453b381b3SDavid Woodhouse if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) 695cad321adSChris Mason btrfs_queue_worker(&fs_info->endio_meta_write_workers, 696cad321adSChris Mason &end_io_wq->work); 69753b381b3SDavid Woodhouse else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) 6980cb59c99SJosef Bacik btrfs_queue_worker(&fs_info->endio_freespace_worker, 6990cb59c99SJosef Bacik &end_io_wq->work); 70053b381b3SDavid Woodhouse else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 70153b381b3SDavid Woodhouse btrfs_queue_worker(&fs_info->endio_raid56_workers, 70253b381b3SDavid Woodhouse &end_io_wq->work); 703cad321adSChris Mason else 704e6dcd2dcSChris Mason btrfs_queue_worker(&fs_info->endio_write_workers, 705e6dcd2dcSChris Mason &end_io_wq->work); 706d20f7043SChris Mason } else { 70753b381b3SDavid Woodhouse if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 70853b381b3SDavid Woodhouse btrfs_queue_worker(&fs_info->endio_raid56_workers, 70953b381b3SDavid Woodhouse &end_io_wq->work); 71053b381b3SDavid Woodhouse else if (end_io_wq->metadata) 711d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_meta_workers, 712d20f7043SChris Mason &end_io_wq->work); 713e6dcd2dcSChris Mason else 714d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_workers, 715d20f7043SChris Mason &end_io_wq->work); 716d20f7043SChris Mason } 717ce9adaa5SChris Mason } 718ce9adaa5SChris Mason 7190cb59c99SJosef Bacik /* 7200cb59c99SJosef Bacik * For the metadata arg you want 7210cb59c99SJosef Bacik * 7220cb59c99SJosef Bacik * 0 - if data 7230cb59c99SJosef Bacik * 1 - if normal metadta 7240cb59c99SJosef Bacik * 2 - if writing to the free space cache area 72553b381b3SDavid Woodhouse * 3 - raid parity work 7260cb59c99SJosef Bacik */ 72722c59948SChris Mason int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, 72822c59948SChris Mason int metadata) 7290b86a832SChris Mason { 730ce9adaa5SChris Mason struct end_io_wq *end_io_wq; 731ce9adaa5SChris Mason end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); 732ce9adaa5SChris Mason if (!end_io_wq) 733ce9adaa5SChris Mason return -ENOMEM; 734ce9adaa5SChris Mason 735ce9adaa5SChris Mason end_io_wq->private = bio->bi_private; 736ce9adaa5SChris Mason end_io_wq->end_io = bio->bi_end_io; 73722c59948SChris Mason end_io_wq->info = info; 738ce9adaa5SChris Mason end_io_wq->error = 0; 739ce9adaa5SChris Mason end_io_wq->bio = bio; 74022c59948SChris Mason end_io_wq->metadata = metadata; 741ce9adaa5SChris Mason 742ce9adaa5SChris Mason bio->bi_private = end_io_wq; 743ce9adaa5SChris Mason bio->bi_end_io = end_workqueue_bio; 74422c59948SChris Mason return 0; 74522c59948SChris Mason } 74622c59948SChris Mason 747b64a2851SChris Mason unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) 7484854ddd0SChris Mason { 7494854ddd0SChris Mason unsigned long limit = min_t(unsigned long, 7504854ddd0SChris Mason info->workers.max_workers, 7514854ddd0SChris Mason info->fs_devices->open_devices); 7524854ddd0SChris Mason return 256 * limit; 7534854ddd0SChris Mason } 7544854ddd0SChris Mason 7554a69a410SChris Mason static void run_one_async_start(struct btrfs_work *work) 7564a69a410SChris Mason { 7574a69a410SChris Mason struct async_submit_bio *async; 75879787eaaSJeff Mahoney int ret; 7594a69a410SChris Mason 7604a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 76179787eaaSJeff Mahoney ret = async->submit_bio_start(async->inode, async->rw, async->bio, 762eaf25d93SChris Mason async->mirror_num, async->bio_flags, 763eaf25d93SChris Mason async->bio_offset); 76479787eaaSJeff Mahoney if (ret) 76579787eaaSJeff Mahoney async->error = ret; 7664a69a410SChris Mason } 7674a69a410SChris Mason 7684a69a410SChris Mason static void run_one_async_done(struct btrfs_work *work) 7698b712842SChris Mason { 7708b712842SChris Mason struct btrfs_fs_info *fs_info; 7718b712842SChris Mason struct async_submit_bio *async; 7724854ddd0SChris Mason int limit; 7738b712842SChris Mason 7748b712842SChris Mason async = container_of(work, struct async_submit_bio, work); 7758b712842SChris Mason fs_info = BTRFS_I(async->inode)->root->fs_info; 7764854ddd0SChris Mason 777b64a2851SChris Mason limit = btrfs_async_submit_limit(fs_info); 7784854ddd0SChris Mason limit = limit * 2 / 3; 7794854ddd0SChris Mason 78066657b31SJosef Bacik if (atomic_dec_return(&fs_info->nr_async_submits) < limit && 781b64a2851SChris Mason waitqueue_active(&fs_info->async_submit_wait)) 7824854ddd0SChris Mason wake_up(&fs_info->async_submit_wait); 7834854ddd0SChris Mason 78479787eaaSJeff Mahoney /* If an error occured we just want to clean up the bio and move on */ 78579787eaaSJeff Mahoney if (async->error) { 78679787eaaSJeff Mahoney bio_endio(async->bio, async->error); 78779787eaaSJeff Mahoney return; 78879787eaaSJeff Mahoney } 78979787eaaSJeff Mahoney 7904a69a410SChris Mason async->submit_bio_done(async->inode, async->rw, async->bio, 791eaf25d93SChris Mason async->mirror_num, async->bio_flags, 792eaf25d93SChris Mason async->bio_offset); 7934a69a410SChris Mason } 7944a69a410SChris Mason 7954a69a410SChris Mason static void run_one_async_free(struct btrfs_work *work) 7964a69a410SChris Mason { 7974a69a410SChris Mason struct async_submit_bio *async; 7984a69a410SChris Mason 7994a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 8008b712842SChris Mason kfree(async); 8018b712842SChris Mason } 8028b712842SChris Mason 80344b8bd7eSChris Mason int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, 80444b8bd7eSChris Mason int rw, struct bio *bio, int mirror_num, 805c8b97818SChris Mason unsigned long bio_flags, 806eaf25d93SChris Mason u64 bio_offset, 8074a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start, 8084a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done) 80944b8bd7eSChris Mason { 81044b8bd7eSChris Mason struct async_submit_bio *async; 81144b8bd7eSChris Mason 81244b8bd7eSChris Mason async = kmalloc(sizeof(*async), GFP_NOFS); 81344b8bd7eSChris Mason if (!async) 81444b8bd7eSChris Mason return -ENOMEM; 81544b8bd7eSChris Mason 81644b8bd7eSChris Mason async->inode = inode; 81744b8bd7eSChris Mason async->rw = rw; 81844b8bd7eSChris Mason async->bio = bio; 81944b8bd7eSChris Mason async->mirror_num = mirror_num; 8204a69a410SChris Mason async->submit_bio_start = submit_bio_start; 8214a69a410SChris Mason async->submit_bio_done = submit_bio_done; 8224a69a410SChris Mason 8234a69a410SChris Mason async->work.func = run_one_async_start; 8244a69a410SChris Mason async->work.ordered_func = run_one_async_done; 8254a69a410SChris Mason async->work.ordered_free = run_one_async_free; 8264a69a410SChris Mason 8278b712842SChris Mason async->work.flags = 0; 828c8b97818SChris Mason async->bio_flags = bio_flags; 829eaf25d93SChris Mason async->bio_offset = bio_offset; 8308c8bee1dSChris Mason 83179787eaaSJeff Mahoney async->error = 0; 83279787eaaSJeff Mahoney 833cb03c743SChris Mason atomic_inc(&fs_info->nr_async_submits); 834d313d7a3SChris Mason 8357b6d91daSChristoph Hellwig if (rw & REQ_SYNC) 836d313d7a3SChris Mason btrfs_set_work_high_prio(&async->work); 837d313d7a3SChris Mason 8388b712842SChris Mason btrfs_queue_worker(&fs_info->workers, &async->work); 8399473f16cSChris Mason 840771ed689SChris Mason while (atomic_read(&fs_info->async_submit_draining) && 841771ed689SChris Mason atomic_read(&fs_info->nr_async_submits)) { 842771ed689SChris Mason wait_event(fs_info->async_submit_wait, 843771ed689SChris Mason (atomic_read(&fs_info->nr_async_submits) == 0)); 844771ed689SChris Mason } 845771ed689SChris Mason 84644b8bd7eSChris Mason return 0; 84744b8bd7eSChris Mason } 84844b8bd7eSChris Mason 849ce3ed71aSChris Mason static int btree_csum_one_bio(struct bio *bio) 850ce3ed71aSChris Mason { 851ce3ed71aSChris Mason struct bio_vec *bvec = bio->bi_io_vec; 852ce3ed71aSChris Mason int bio_index = 0; 853ce3ed71aSChris Mason struct btrfs_root *root; 85479787eaaSJeff Mahoney int ret = 0; 855ce3ed71aSChris Mason 856ce3ed71aSChris Mason WARN_ON(bio->bi_vcnt <= 0); 857ce3ed71aSChris Mason while (bio_index < bio->bi_vcnt) { 858ce3ed71aSChris Mason root = BTRFS_I(bvec->bv_page->mapping->host)->root; 85979787eaaSJeff Mahoney ret = csum_dirty_buffer(root, bvec->bv_page); 86079787eaaSJeff Mahoney if (ret) 86179787eaaSJeff Mahoney break; 862ce3ed71aSChris Mason bio_index++; 863ce3ed71aSChris Mason bvec++; 864ce3ed71aSChris Mason } 86579787eaaSJeff Mahoney return ret; 866ce3ed71aSChris Mason } 867ce3ed71aSChris Mason 8684a69a410SChris Mason static int __btree_submit_bio_start(struct inode *inode, int rw, 8694a69a410SChris Mason struct bio *bio, int mirror_num, 870eaf25d93SChris Mason unsigned long bio_flags, 871eaf25d93SChris Mason u64 bio_offset) 87222c59948SChris Mason { 8738b712842SChris Mason /* 8748b712842SChris Mason * when we're called for a write, we're already in the async 8755443be45SChris Mason * submission context. Just jump into btrfs_map_bio 8768b712842SChris Mason */ 87779787eaaSJeff Mahoney return btree_csum_one_bio(bio); 87822c59948SChris Mason } 87922c59948SChris Mason 8804a69a410SChris Mason static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, 881eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 882eaf25d93SChris Mason u64 bio_offset) 8834a69a410SChris Mason { 88461891923SStefan Behrens int ret; 88561891923SStefan Behrens 8868b712842SChris Mason /* 8874a69a410SChris Mason * when we're called for a write, we're already in the async 8884a69a410SChris Mason * submission context. Just jump into btrfs_map_bio 8898b712842SChris Mason */ 89061891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); 89161891923SStefan Behrens if (ret) 89261891923SStefan Behrens bio_endio(bio, ret); 89361891923SStefan Behrens return ret; 8940b86a832SChris Mason } 8950b86a832SChris Mason 896de0022b9SJosef Bacik static int check_async_write(struct inode *inode, unsigned long bio_flags) 897de0022b9SJosef Bacik { 898de0022b9SJosef Bacik if (bio_flags & EXTENT_BIO_TREE_LOG) 899de0022b9SJosef Bacik return 0; 900de0022b9SJosef Bacik #ifdef CONFIG_X86 901de0022b9SJosef Bacik if (cpu_has_xmm4_2) 902de0022b9SJosef Bacik return 0; 903de0022b9SJosef Bacik #endif 904de0022b9SJosef Bacik return 1; 905de0022b9SJosef Bacik } 906de0022b9SJosef Bacik 90744b8bd7eSChris Mason static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, 908eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 909eaf25d93SChris Mason u64 bio_offset) 91044b8bd7eSChris Mason { 911de0022b9SJosef Bacik int async = check_async_write(inode, bio_flags); 9124a69a410SChris Mason int ret; 913cad321adSChris Mason 9147b6d91daSChristoph Hellwig if (!(rw & REQ_WRITE)) { 915cad321adSChris Mason /* 916cad321adSChris Mason * called for a read, do the setup so that checksum validation 917cad321adSChris Mason * can happen in the async kernel threads 918cad321adSChris Mason */ 919f3f266abSChris Mason ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, 920f3f266abSChris Mason bio, 1); 9211d4284bdSChris Mason if (ret) 92261891923SStefan Behrens goto out_w_error; 92361891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 9246f3577bdSChris Mason mirror_num, 0); 925de0022b9SJosef Bacik } else if (!async) { 926de0022b9SJosef Bacik ret = btree_csum_one_bio(bio); 927de0022b9SJosef Bacik if (ret) 92861891923SStefan Behrens goto out_w_error; 92961891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 930de0022b9SJosef Bacik mirror_num, 0); 93161891923SStefan Behrens } else { 932cad321adSChris Mason /* 93361891923SStefan Behrens * kthread helpers are used to submit writes so that 93461891923SStefan Behrens * checksumming can happen in parallel across all CPUs 935cad321adSChris Mason */ 93661891923SStefan Behrens ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, 937c8b97818SChris Mason inode, rw, bio, mirror_num, 0, 938eaf25d93SChris Mason bio_offset, 9394a69a410SChris Mason __btree_submit_bio_start, 9404a69a410SChris Mason __btree_submit_bio_done); 94144b8bd7eSChris Mason } 94244b8bd7eSChris Mason 94361891923SStefan Behrens if (ret) { 94461891923SStefan Behrens out_w_error: 94561891923SStefan Behrens bio_endio(bio, ret); 94661891923SStefan Behrens } 94761891923SStefan Behrens return ret; 94861891923SStefan Behrens } 94961891923SStefan Behrens 9503dd1462eSJan Beulich #ifdef CONFIG_MIGRATION 951784b4e29SChris Mason static int btree_migratepage(struct address_space *mapping, 952a6bc32b8SMel Gorman struct page *newpage, struct page *page, 953a6bc32b8SMel Gorman enum migrate_mode mode) 954784b4e29SChris Mason { 955784b4e29SChris Mason /* 956784b4e29SChris Mason * we can't safely write a btree page from here, 957784b4e29SChris Mason * we haven't done the locking hook 958784b4e29SChris Mason */ 959784b4e29SChris Mason if (PageDirty(page)) 960784b4e29SChris Mason return -EAGAIN; 961784b4e29SChris Mason /* 962784b4e29SChris Mason * Buffers may be managed in a filesystem specific way. 963784b4e29SChris Mason * We must have no buffers or drop them. 964784b4e29SChris Mason */ 965784b4e29SChris Mason if (page_has_private(page) && 966784b4e29SChris Mason !try_to_release_page(page, GFP_KERNEL)) 967784b4e29SChris Mason return -EAGAIN; 968a6bc32b8SMel Gorman return migrate_page(mapping, newpage, page, mode); 969784b4e29SChris Mason } 9703dd1462eSJan Beulich #endif 971784b4e29SChris Mason 9720da5468fSChris Mason 9730da5468fSChris Mason static int btree_writepages(struct address_space *mapping, 9740da5468fSChris Mason struct writeback_control *wbc) 9750da5468fSChris Mason { 976d1310b2eSChris Mason struct extent_io_tree *tree; 977e2d84521SMiao Xie struct btrfs_fs_info *fs_info; 978e2d84521SMiao Xie int ret; 979e2d84521SMiao Xie 980d1310b2eSChris Mason tree = &BTRFS_I(mapping->host)->io_tree; 981d8d5f3e1SChris Mason if (wbc->sync_mode == WB_SYNC_NONE) { 982448d640bSChris Mason 983448d640bSChris Mason if (wbc->for_kupdate) 984448d640bSChris Mason return 0; 985448d640bSChris Mason 986e2d84521SMiao Xie fs_info = BTRFS_I(mapping->host)->root->fs_info; 987b9473439SChris Mason /* this is a bit racy, but that's ok */ 988e2d84521SMiao Xie ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, 989e2d84521SMiao Xie BTRFS_DIRTY_METADATA_THRESH); 990e2d84521SMiao Xie if (ret < 0) 991793955bcSChris Mason return 0; 992793955bcSChris Mason } 9930b32f4bbSJosef Bacik return btree_write_cache_pages(mapping, wbc); 9940da5468fSChris Mason } 9950da5468fSChris Mason 996b2950863SChristoph Hellwig static int btree_readpage(struct file *file, struct page *page) 9975f39d397SChris Mason { 998d1310b2eSChris Mason struct extent_io_tree *tree; 999d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 10008ddc7d9cSJan Schmidt return extent_read_full_page(tree, page, btree_get_extent, 0); 10015f39d397SChris Mason } 10025f39d397SChris Mason 100370dec807SChris Mason static int btree_releasepage(struct page *page, gfp_t gfp_flags) 10045f39d397SChris Mason { 100598509cfcSChris Mason if (PageWriteback(page) || PageDirty(page)) 100698509cfcSChris Mason return 0; 10070c4e538bSDavid Sterba 1008f7a52a40SDavid Sterba return try_release_extent_buffer(page); 1009d98237b3SChris Mason } 1010d98237b3SChris Mason 10115f39d397SChris Mason static void btree_invalidatepage(struct page *page, unsigned long offset) 1012d98237b3SChris Mason { 1013d1310b2eSChris Mason struct extent_io_tree *tree; 1014d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 10155f39d397SChris Mason extent_invalidatepage(tree, page, offset); 10165f39d397SChris Mason btree_releasepage(page, GFP_NOFS); 10179ad6b7bcSChris Mason if (PagePrivate(page)) { 1018d397712bSChris Mason printk(KERN_WARNING "btrfs warning page private not zero " 1019d397712bSChris Mason "on page %llu\n", (unsigned long long)page_offset(page)); 10209ad6b7bcSChris Mason ClearPagePrivate(page); 10219ad6b7bcSChris Mason set_page_private(page, 0); 10229ad6b7bcSChris Mason page_cache_release(page); 10239ad6b7bcSChris Mason } 1024d98237b3SChris Mason } 1025d98237b3SChris Mason 10260b32f4bbSJosef Bacik static int btree_set_page_dirty(struct page *page) 10270b32f4bbSJosef Bacik { 1028bb146eb2SJosef Bacik #ifdef DEBUG 10290b32f4bbSJosef Bacik struct extent_buffer *eb; 10300b32f4bbSJosef Bacik 10310b32f4bbSJosef Bacik BUG_ON(!PagePrivate(page)); 10320b32f4bbSJosef Bacik eb = (struct extent_buffer *)page->private; 10330b32f4bbSJosef Bacik BUG_ON(!eb); 10340b32f4bbSJosef Bacik BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); 10350b32f4bbSJosef Bacik BUG_ON(!atomic_read(&eb->refs)); 10360b32f4bbSJosef Bacik btrfs_assert_tree_locked(eb); 1037bb146eb2SJosef Bacik #endif 10380b32f4bbSJosef Bacik return __set_page_dirty_nobuffers(page); 10390b32f4bbSJosef Bacik } 10400b32f4bbSJosef Bacik 10417f09410bSAlexey Dobriyan static const struct address_space_operations btree_aops = { 1042d98237b3SChris Mason .readpage = btree_readpage, 10430da5468fSChris Mason .writepages = btree_writepages, 10445f39d397SChris Mason .releasepage = btree_releasepage, 10455f39d397SChris Mason .invalidatepage = btree_invalidatepage, 10465a92bc88SChris Mason #ifdef CONFIG_MIGRATION 1047784b4e29SChris Mason .migratepage = btree_migratepage, 10485a92bc88SChris Mason #endif 10490b32f4bbSJosef Bacik .set_page_dirty = btree_set_page_dirty, 1050d98237b3SChris Mason }; 1051123abc88SChris Mason 1052ca7a79adSChris Mason int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, 1053ca7a79adSChris Mason u64 parent_transid) 1054090d1875SChris Mason { 10555f39d397SChris Mason struct extent_buffer *buf = NULL; 10565f39d397SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 1057de428b63SChris Mason int ret = 0; 1058090d1875SChris Mason 1059db94535dSChris Mason buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 10605f39d397SChris Mason if (!buf) 1061090d1875SChris Mason return 0; 1062d1310b2eSChris Mason read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, 1063bb82ab88SArne Jansen buf, 0, WAIT_NONE, btree_get_extent, 0); 10645f39d397SChris Mason free_extent_buffer(buf); 1065de428b63SChris Mason return ret; 1066090d1875SChris Mason } 1067090d1875SChris Mason 1068ab0fff03SArne Jansen int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, 1069ab0fff03SArne Jansen int mirror_num, struct extent_buffer **eb) 1070ab0fff03SArne Jansen { 1071ab0fff03SArne Jansen struct extent_buffer *buf = NULL; 1072ab0fff03SArne Jansen struct inode *btree_inode = root->fs_info->btree_inode; 1073ab0fff03SArne Jansen struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; 1074ab0fff03SArne Jansen int ret; 1075ab0fff03SArne Jansen 1076ab0fff03SArne Jansen buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 1077ab0fff03SArne Jansen if (!buf) 1078ab0fff03SArne Jansen return 0; 1079ab0fff03SArne Jansen 1080ab0fff03SArne Jansen set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); 1081ab0fff03SArne Jansen 1082ab0fff03SArne Jansen ret = read_extent_buffer_pages(io_tree, buf, 0, WAIT_PAGE_LOCK, 1083ab0fff03SArne Jansen btree_get_extent, mirror_num); 1084ab0fff03SArne Jansen if (ret) { 1085ab0fff03SArne Jansen free_extent_buffer(buf); 1086ab0fff03SArne Jansen return ret; 1087ab0fff03SArne Jansen } 1088ab0fff03SArne Jansen 1089ab0fff03SArne Jansen if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { 1090ab0fff03SArne Jansen free_extent_buffer(buf); 1091ab0fff03SArne Jansen return -EIO; 10920b32f4bbSJosef Bacik } else if (extent_buffer_uptodate(buf)) { 1093ab0fff03SArne Jansen *eb = buf; 1094ab0fff03SArne Jansen } else { 1095ab0fff03SArne Jansen free_extent_buffer(buf); 1096ab0fff03SArne Jansen } 1097ab0fff03SArne Jansen return 0; 1098ab0fff03SArne Jansen } 1099ab0fff03SArne Jansen 11000999df54SChris Mason struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, 11010999df54SChris Mason u64 bytenr, u32 blocksize) 11020999df54SChris Mason { 11030999df54SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 11040999df54SChris Mason struct extent_buffer *eb; 11050999df54SChris Mason eb = find_extent_buffer(&BTRFS_I(btree_inode)->io_tree, 1106f09d1f60SDavid Sterba bytenr, blocksize); 11070999df54SChris Mason return eb; 11080999df54SChris Mason } 11090999df54SChris Mason 11100999df54SChris Mason struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, 11110999df54SChris Mason u64 bytenr, u32 blocksize) 11120999df54SChris Mason { 11130999df54SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 11140999df54SChris Mason struct extent_buffer *eb; 11150999df54SChris Mason 11160999df54SChris Mason eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree, 1117727011e0SChris Mason bytenr, blocksize); 11180999df54SChris Mason return eb; 11190999df54SChris Mason } 11200999df54SChris Mason 11210999df54SChris Mason 1122e02119d5SChris Mason int btrfs_write_tree_block(struct extent_buffer *buf) 1123e02119d5SChris Mason { 1124727011e0SChris Mason return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, 11258aa38c31SChristoph Hellwig buf->start + buf->len - 1); 1126e02119d5SChris Mason } 1127e02119d5SChris Mason 1128e02119d5SChris Mason int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) 1129e02119d5SChris Mason { 1130727011e0SChris Mason return filemap_fdatawait_range(buf->pages[0]->mapping, 11318aa38c31SChristoph Hellwig buf->start, buf->start + buf->len - 1); 1132e02119d5SChris Mason } 1133e02119d5SChris Mason 1134db94535dSChris Mason struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, 1135ca7a79adSChris Mason u32 blocksize, u64 parent_transid) 1136e20d96d6SChris Mason { 11375f39d397SChris Mason struct extent_buffer *buf = NULL; 113819c00ddcSChris Mason int ret; 113919c00ddcSChris Mason 1140db94535dSChris Mason buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 11415f39d397SChris Mason if (!buf) 1142d98237b3SChris Mason return NULL; 1143e4204dedSChris Mason 1144ca7a79adSChris Mason ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 11455f39d397SChris Mason return buf; 1146ce9adaa5SChris Mason 1147eb60ceacSChris Mason } 1148eb60ceacSChris Mason 1149d5c13f92SJeff Mahoney void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, 11505f39d397SChris Mason struct extent_buffer *buf) 1151ed2ff2cbSChris Mason { 1152e2d84521SMiao Xie struct btrfs_fs_info *fs_info = root->fs_info; 1153e2d84521SMiao Xie 115455c69072SChris Mason if (btrfs_header_generation(buf) == 1155e2d84521SMiao Xie fs_info->running_transaction->transid) { 1156b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 1157b4ce94deSChris Mason 1158b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { 1159e2d84521SMiao Xie __percpu_counter_add(&fs_info->dirty_metadata_bytes, 1160e2d84521SMiao Xie -buf->len, 1161e2d84521SMiao Xie fs_info->dirty_metadata_batch); 1162b9473439SChris Mason /* ugh, clear_extent_buffer_dirty needs to lock the page */ 1163b9473439SChris Mason btrfs_set_lock_blocking(buf); 11640b32f4bbSJosef Bacik clear_extent_buffer_dirty(buf); 1165925baeddSChris Mason } 11665f39d397SChris Mason } 1167ed7b63ebSJosef Bacik } 11685f39d397SChris Mason 1169143bede5SJeff Mahoney static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, 117087ee04ebSChris Mason u32 stripesize, struct btrfs_root *root, 11719f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 1172e20d96d6SChris Mason u64 objectid) 1173d97e63b6SChris Mason { 1174cfaa7295SChris Mason root->node = NULL; 1175a28ec197SChris Mason root->commit_root = NULL; 1176db94535dSChris Mason root->sectorsize = sectorsize; 1177db94535dSChris Mason root->nodesize = nodesize; 1178db94535dSChris Mason root->leafsize = leafsize; 117987ee04ebSChris Mason root->stripesize = stripesize; 1180123abc88SChris Mason root->ref_cows = 0; 11810b86a832SChris Mason root->track_dirty = 0; 1182c71bf099SYan, Zheng root->in_radix = 0; 1183d68fc57bSYan, Zheng root->orphan_item_inserted = 0; 1184d68fc57bSYan, Zheng root->orphan_cleanup_state = 0; 11850b86a832SChris Mason 11860f7d52f4SChris Mason root->objectid = objectid; 11870f7d52f4SChris Mason root->last_trans = 0; 118813a8a7c8SYan, Zheng root->highest_objectid = 0; 118958176a96SJosef Bacik root->name = NULL; 11906bef4d31SEric Paris root->inode_tree = RB_ROOT; 119116cdcec7SMiao Xie INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); 1192f0486c68SYan, Zheng root->block_rsv = NULL; 1193d68fc57bSYan, Zheng root->orphan_block_rsv = NULL; 11940b86a832SChris Mason 11950b86a832SChris Mason INIT_LIST_HEAD(&root->dirty_list); 11965d4f98a2SYan Zheng INIT_LIST_HEAD(&root->root_list); 11972ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[0]); 11982ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[1]); 1199d68fc57bSYan, Zheng spin_lock_init(&root->orphan_lock); 12005d4f98a2SYan Zheng spin_lock_init(&root->inode_lock); 1201f0486c68SYan, Zheng spin_lock_init(&root->accounting_lock); 12022ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[0]); 12032ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[1]); 1204a2135011SChris Mason mutex_init(&root->objectid_mutex); 1205e02119d5SChris Mason mutex_init(&root->log_mutex); 12067237f183SYan Zheng init_waitqueue_head(&root->log_writer_wait); 12077237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[0]); 12087237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[1]); 12097237f183SYan Zheng atomic_set(&root->log_commit[0], 0); 12107237f183SYan Zheng atomic_set(&root->log_commit[1], 0); 12117237f183SYan Zheng atomic_set(&root->log_writers, 0); 12122ecb7923SMiao Xie atomic_set(&root->log_batch, 0); 12138a35d95fSJosef Bacik atomic_set(&root->orphan_inodes, 0); 12147237f183SYan Zheng root->log_transid = 0; 1215257c62e1SChris Mason root->last_log_commit = 0; 1216d0c803c4SChris Mason extent_io_tree_init(&root->dirty_log_pages, 1217f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 1218017e5369SChris Mason 12193768f368SChris Mason memset(&root->root_key, 0, sizeof(root->root_key)); 12203768f368SChris Mason memset(&root->root_item, 0, sizeof(root->root_item)); 12216702ed49SChris Mason memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); 122258176a96SJosef Bacik memset(&root->root_kobj, 0, sizeof(root->root_kobj)); 12233f157a2fSChris Mason root->defrag_trans_start = fs_info->generation; 122458176a96SJosef Bacik init_completion(&root->kobj_unregister); 12256702ed49SChris Mason root->defrag_running = 0; 12264d775673SChris Mason root->root_key.objectid = objectid; 12270ee5dc67SAl Viro root->anon_dev = 0; 12288ea05e3aSAlexander Block 12295f3ab90aSAnand Jain spin_lock_init(&root->root_item_lock); 12303768f368SChris Mason } 12313768f368SChris Mason 1232200a5c17SJeff Mahoney static int __must_check find_and_setup_root(struct btrfs_root *tree_root, 12339f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 12349f5fae2fSChris Mason u64 objectid, 1235e20d96d6SChris Mason struct btrfs_root *root) 12363768f368SChris Mason { 12373768f368SChris Mason int ret; 1238db94535dSChris Mason u32 blocksize; 123984234f3aSYan Zheng u64 generation; 12403768f368SChris Mason 1241db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 124287ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 124387ee04ebSChris Mason root, fs_info, objectid); 12443768f368SChris Mason ret = btrfs_find_last_root(tree_root, objectid, 12453768f368SChris Mason &root->root_item, &root->root_key); 12464df27c4dSYan, Zheng if (ret > 0) 12474df27c4dSYan, Zheng return -ENOENT; 1248200a5c17SJeff Mahoney else if (ret < 0) 1249200a5c17SJeff Mahoney return ret; 12503768f368SChris Mason 125184234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1252db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1253af31f5e5SChris Mason root->commit_root = NULL; 1254db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 125584234f3aSYan Zheng blocksize, generation); 1256b9fab919SChris Mason if (!root->node || !btrfs_buffer_uptodate(root->node, generation, 0)) { 125768433b73SChris Mason free_extent_buffer(root->node); 1258af31f5e5SChris Mason root->node = NULL; 125968433b73SChris Mason return -EIO; 126068433b73SChris Mason } 12614df27c4dSYan, Zheng root->commit_root = btrfs_root_node(root); 1262d97e63b6SChris Mason return 0; 1263d97e63b6SChris Mason } 1264d97e63b6SChris Mason 1265f84a8bd6SAl Viro static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info) 12666f07e42eSAl Viro { 12676f07e42eSAl Viro struct btrfs_root *root = kzalloc(sizeof(*root), GFP_NOFS); 12686f07e42eSAl Viro if (root) 12696f07e42eSAl Viro root->fs_info = fs_info; 12706f07e42eSAl Viro return root; 12716f07e42eSAl Viro } 12726f07e42eSAl Viro 127320897f5cSArne Jansen struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, 127420897f5cSArne Jansen struct btrfs_fs_info *fs_info, 127520897f5cSArne Jansen u64 objectid) 127620897f5cSArne Jansen { 127720897f5cSArne Jansen struct extent_buffer *leaf; 127820897f5cSArne Jansen struct btrfs_root *tree_root = fs_info->tree_root; 127920897f5cSArne Jansen struct btrfs_root *root; 128020897f5cSArne Jansen struct btrfs_key key; 128120897f5cSArne Jansen int ret = 0; 128220897f5cSArne Jansen u64 bytenr; 12836463fe58SStefan Behrens uuid_le uuid; 128420897f5cSArne Jansen 128520897f5cSArne Jansen root = btrfs_alloc_root(fs_info); 128620897f5cSArne Jansen if (!root) 128720897f5cSArne Jansen return ERR_PTR(-ENOMEM); 128820897f5cSArne Jansen 128920897f5cSArne Jansen __setup_root(tree_root->nodesize, tree_root->leafsize, 129020897f5cSArne Jansen tree_root->sectorsize, tree_root->stripesize, 129120897f5cSArne Jansen root, fs_info, objectid); 129220897f5cSArne Jansen root->root_key.objectid = objectid; 129320897f5cSArne Jansen root->root_key.type = BTRFS_ROOT_ITEM_KEY; 129420897f5cSArne Jansen root->root_key.offset = 0; 129520897f5cSArne Jansen 129620897f5cSArne Jansen leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 129720897f5cSArne Jansen 0, objectid, NULL, 0, 0, 0); 129820897f5cSArne Jansen if (IS_ERR(leaf)) { 129920897f5cSArne Jansen ret = PTR_ERR(leaf); 13001dd05682STsutomu Itoh leaf = NULL; 130120897f5cSArne Jansen goto fail; 130220897f5cSArne Jansen } 130320897f5cSArne Jansen 130420897f5cSArne Jansen bytenr = leaf->start; 130520897f5cSArne Jansen memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 130620897f5cSArne Jansen btrfs_set_header_bytenr(leaf, leaf->start); 130720897f5cSArne Jansen btrfs_set_header_generation(leaf, trans->transid); 130820897f5cSArne Jansen btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 130920897f5cSArne Jansen btrfs_set_header_owner(leaf, objectid); 131020897f5cSArne Jansen root->node = leaf; 131120897f5cSArne Jansen 131220897f5cSArne Jansen write_extent_buffer(leaf, fs_info->fsid, 131320897f5cSArne Jansen (unsigned long)btrfs_header_fsid(leaf), 131420897f5cSArne Jansen BTRFS_FSID_SIZE); 131520897f5cSArne Jansen write_extent_buffer(leaf, fs_info->chunk_tree_uuid, 131620897f5cSArne Jansen (unsigned long)btrfs_header_chunk_tree_uuid(leaf), 131720897f5cSArne Jansen BTRFS_UUID_SIZE); 131820897f5cSArne Jansen btrfs_mark_buffer_dirty(leaf); 131920897f5cSArne Jansen 132020897f5cSArne Jansen root->commit_root = btrfs_root_node(root); 132120897f5cSArne Jansen root->track_dirty = 1; 132220897f5cSArne Jansen 132320897f5cSArne Jansen 132420897f5cSArne Jansen root->root_item.flags = 0; 132520897f5cSArne Jansen root->root_item.byte_limit = 0; 132620897f5cSArne Jansen btrfs_set_root_bytenr(&root->root_item, leaf->start); 132720897f5cSArne Jansen btrfs_set_root_generation(&root->root_item, trans->transid); 132820897f5cSArne Jansen btrfs_set_root_level(&root->root_item, 0); 132920897f5cSArne Jansen btrfs_set_root_refs(&root->root_item, 1); 133020897f5cSArne Jansen btrfs_set_root_used(&root->root_item, leaf->len); 133120897f5cSArne Jansen btrfs_set_root_last_snapshot(&root->root_item, 0); 133220897f5cSArne Jansen btrfs_set_root_dirid(&root->root_item, 0); 13336463fe58SStefan Behrens uuid_le_gen(&uuid); 13346463fe58SStefan Behrens memcpy(root->root_item.uuid, uuid.b, BTRFS_UUID_SIZE); 133520897f5cSArne Jansen root->root_item.drop_level = 0; 133620897f5cSArne Jansen 133720897f5cSArne Jansen key.objectid = objectid; 133820897f5cSArne Jansen key.type = BTRFS_ROOT_ITEM_KEY; 133920897f5cSArne Jansen key.offset = 0; 134020897f5cSArne Jansen ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); 134120897f5cSArne Jansen if (ret) 134220897f5cSArne Jansen goto fail; 134320897f5cSArne Jansen 134420897f5cSArne Jansen btrfs_tree_unlock(leaf); 134520897f5cSArne Jansen 134620897f5cSArne Jansen return root; 13471dd05682STsutomu Itoh 13481dd05682STsutomu Itoh fail: 13491dd05682STsutomu Itoh if (leaf) { 13501dd05682STsutomu Itoh btrfs_tree_unlock(leaf); 13511dd05682STsutomu Itoh free_extent_buffer(leaf); 13521dd05682STsutomu Itoh } 13531dd05682STsutomu Itoh kfree(root); 13541dd05682STsutomu Itoh 13551dd05682STsutomu Itoh return ERR_PTR(ret); 135620897f5cSArne Jansen } 135720897f5cSArne Jansen 13587237f183SYan Zheng static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, 1359e02119d5SChris Mason struct btrfs_fs_info *fs_info) 13600f7d52f4SChris Mason { 13610f7d52f4SChris Mason struct btrfs_root *root; 13620f7d52f4SChris Mason struct btrfs_root *tree_root = fs_info->tree_root; 13637237f183SYan Zheng struct extent_buffer *leaf; 1364e02119d5SChris Mason 13656f07e42eSAl Viro root = btrfs_alloc_root(fs_info); 1366e02119d5SChris Mason if (!root) 13677237f183SYan Zheng return ERR_PTR(-ENOMEM); 1368e02119d5SChris Mason 1369e02119d5SChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 1370e02119d5SChris Mason tree_root->sectorsize, tree_root->stripesize, 1371e02119d5SChris Mason root, fs_info, BTRFS_TREE_LOG_OBJECTID); 1372e02119d5SChris Mason 1373e02119d5SChris Mason root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 1374e02119d5SChris Mason root->root_key.type = BTRFS_ROOT_ITEM_KEY; 1375e02119d5SChris Mason root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 13767237f183SYan Zheng /* 13777237f183SYan Zheng * log trees do not get reference counted because they go away 13787237f183SYan Zheng * before a real commit is actually done. They do store pointers 13797237f183SYan Zheng * to file data extents, and those reference counts still get 13807237f183SYan Zheng * updated (along with back refs to the log tree). 13817237f183SYan Zheng */ 1382e02119d5SChris Mason root->ref_cows = 0; 1383e02119d5SChris Mason 13845d4f98a2SYan Zheng leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, 138566d7e7f0SArne Jansen BTRFS_TREE_LOG_OBJECTID, NULL, 13865581a51aSJan Schmidt 0, 0, 0); 13877237f183SYan Zheng if (IS_ERR(leaf)) { 13887237f183SYan Zheng kfree(root); 13897237f183SYan Zheng return ERR_CAST(leaf); 13907237f183SYan Zheng } 1391e02119d5SChris Mason 13925d4f98a2SYan Zheng memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 13935d4f98a2SYan Zheng btrfs_set_header_bytenr(leaf, leaf->start); 13945d4f98a2SYan Zheng btrfs_set_header_generation(leaf, trans->transid); 13955d4f98a2SYan Zheng btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 13965d4f98a2SYan Zheng btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); 13977237f183SYan Zheng root->node = leaf; 1398e02119d5SChris Mason 1399e02119d5SChris Mason write_extent_buffer(root->node, root->fs_info->fsid, 1400e02119d5SChris Mason (unsigned long)btrfs_header_fsid(root->node), 1401e02119d5SChris Mason BTRFS_FSID_SIZE); 1402e02119d5SChris Mason btrfs_mark_buffer_dirty(root->node); 1403e02119d5SChris Mason btrfs_tree_unlock(root->node); 14047237f183SYan Zheng return root; 14057237f183SYan Zheng } 14067237f183SYan Zheng 14077237f183SYan Zheng int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 14087237f183SYan Zheng struct btrfs_fs_info *fs_info) 14097237f183SYan Zheng { 14107237f183SYan Zheng struct btrfs_root *log_root; 14117237f183SYan Zheng 14127237f183SYan Zheng log_root = alloc_log_tree(trans, fs_info); 14137237f183SYan Zheng if (IS_ERR(log_root)) 14147237f183SYan Zheng return PTR_ERR(log_root); 14157237f183SYan Zheng WARN_ON(fs_info->log_root_tree); 14167237f183SYan Zheng fs_info->log_root_tree = log_root; 14177237f183SYan Zheng return 0; 14187237f183SYan Zheng } 14197237f183SYan Zheng 14207237f183SYan Zheng int btrfs_add_log_tree(struct btrfs_trans_handle *trans, 14217237f183SYan Zheng struct btrfs_root *root) 14227237f183SYan Zheng { 14237237f183SYan Zheng struct btrfs_root *log_root; 14247237f183SYan Zheng struct btrfs_inode_item *inode_item; 14257237f183SYan Zheng 14267237f183SYan Zheng log_root = alloc_log_tree(trans, root->fs_info); 14277237f183SYan Zheng if (IS_ERR(log_root)) 14287237f183SYan Zheng return PTR_ERR(log_root); 14297237f183SYan Zheng 14307237f183SYan Zheng log_root->last_trans = trans->transid; 14317237f183SYan Zheng log_root->root_key.offset = root->root_key.objectid; 14327237f183SYan Zheng 14337237f183SYan Zheng inode_item = &log_root->root_item.inode; 14347237f183SYan Zheng inode_item->generation = cpu_to_le64(1); 14357237f183SYan Zheng inode_item->size = cpu_to_le64(3); 14367237f183SYan Zheng inode_item->nlink = cpu_to_le32(1); 14377237f183SYan Zheng inode_item->nbytes = cpu_to_le64(root->leafsize); 14387237f183SYan Zheng inode_item->mode = cpu_to_le32(S_IFDIR | 0755); 14397237f183SYan Zheng 14405d4f98a2SYan Zheng btrfs_set_root_node(&log_root->root_item, log_root->node); 14417237f183SYan Zheng 14427237f183SYan Zheng WARN_ON(root->log_root); 14437237f183SYan Zheng root->log_root = log_root; 14447237f183SYan Zheng root->log_transid = 0; 1445257c62e1SChris Mason root->last_log_commit = 0; 1446e02119d5SChris Mason return 0; 1447e02119d5SChris Mason } 1448e02119d5SChris Mason 1449e02119d5SChris Mason struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, 1450e02119d5SChris Mason struct btrfs_key *location) 1451e02119d5SChris Mason { 1452e02119d5SChris Mason struct btrfs_root *root; 1453e02119d5SChris Mason struct btrfs_fs_info *fs_info = tree_root->fs_info; 14540f7d52f4SChris Mason struct btrfs_path *path; 14555f39d397SChris Mason struct extent_buffer *l; 145684234f3aSYan Zheng u64 generation; 1457db94535dSChris Mason u32 blocksize; 14580f7d52f4SChris Mason int ret = 0; 14598ea05e3aSAlexander Block int slot; 14600f7d52f4SChris Mason 14616f07e42eSAl Viro root = btrfs_alloc_root(fs_info); 14620cf6c620SChris Mason if (!root) 14630f7d52f4SChris Mason return ERR_PTR(-ENOMEM); 14640f7d52f4SChris Mason if (location->offset == (u64)-1) { 1465db94535dSChris Mason ret = find_and_setup_root(tree_root, fs_info, 14660f7d52f4SChris Mason location->objectid, root); 14670f7d52f4SChris Mason if (ret) { 14680f7d52f4SChris Mason kfree(root); 14690f7d52f4SChris Mason return ERR_PTR(ret); 14700f7d52f4SChris Mason } 147113a8a7c8SYan, Zheng goto out; 14720f7d52f4SChris Mason } 14730f7d52f4SChris Mason 1474db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 147587ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 147687ee04ebSChris Mason root, fs_info, location->objectid); 14770f7d52f4SChris Mason 14780f7d52f4SChris Mason path = btrfs_alloc_path(); 1479db5b493aSTsutomu Itoh if (!path) { 1480db5b493aSTsutomu Itoh kfree(root); 1481db5b493aSTsutomu Itoh return ERR_PTR(-ENOMEM); 1482db5b493aSTsutomu Itoh } 14830f7d52f4SChris Mason ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); 148413a8a7c8SYan, Zheng if (ret == 0) { 14855f39d397SChris Mason l = path->nodes[0]; 14868ea05e3aSAlexander Block slot = path->slots[0]; 14875fbf83c1SStefan Behrens btrfs_read_root_item(l, slot, &root->root_item); 148844b36eb2SYan Zheng memcpy(&root->root_key, location, sizeof(*location)); 148913a8a7c8SYan, Zheng } 14900f7d52f4SChris Mason btrfs_free_path(path); 14910f7d52f4SChris Mason if (ret) { 14925e540f77STsutomu Itoh kfree(root); 149313a8a7c8SYan, Zheng if (ret > 0) 149413a8a7c8SYan, Zheng ret = -ENOENT; 14950f7d52f4SChris Mason return ERR_PTR(ret); 14960f7d52f4SChris Mason } 149713a8a7c8SYan, Zheng 149884234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1499db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1500db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 150184234f3aSYan Zheng blocksize, generation); 1502416bc658SJosef Bacik if (!root->node || !extent_buffer_uptodate(root->node)) { 1503416bc658SJosef Bacik ret = (!root->node) ? -ENOMEM : -EIO; 1504416bc658SJosef Bacik 1505416bc658SJosef Bacik free_extent_buffer(root->node); 1506416bc658SJosef Bacik kfree(root); 1507416bc658SJosef Bacik return ERR_PTR(ret); 1508416bc658SJosef Bacik } 1509416bc658SJosef Bacik 15105d4f98a2SYan Zheng root->commit_root = btrfs_root_node(root); 151179787eaaSJeff Mahoney BUG_ON(!root->node); /* -ENOMEM */ 151213a8a7c8SYan, Zheng out: 151308fe4db1SLi Zefan if (location->objectid != BTRFS_TREE_LOG_OBJECTID) { 15140f7d52f4SChris Mason root->ref_cows = 1; 151508fe4db1SLi Zefan btrfs_check_and_init_root_item(&root->root_item); 151608fe4db1SLi Zefan } 151713a8a7c8SYan, Zheng 15185eda7b5eSChris Mason return root; 15195eda7b5eSChris Mason } 15205eda7b5eSChris Mason 1521edbd8d4eSChris Mason struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, 1522edbd8d4eSChris Mason struct btrfs_key *location) 15235eda7b5eSChris Mason { 15245eda7b5eSChris Mason struct btrfs_root *root; 15255eda7b5eSChris Mason int ret; 15265eda7b5eSChris Mason 1527edbd8d4eSChris Mason if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) 1528edbd8d4eSChris Mason return fs_info->tree_root; 1529edbd8d4eSChris Mason if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) 1530edbd8d4eSChris Mason return fs_info->extent_root; 15318f18cf13SChris Mason if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) 15328f18cf13SChris Mason return fs_info->chunk_root; 15338f18cf13SChris Mason if (location->objectid == BTRFS_DEV_TREE_OBJECTID) 15348f18cf13SChris Mason return fs_info->dev_root; 15350403e47eSYan Zheng if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) 15360403e47eSYan Zheng return fs_info->csum_root; 1537bcef60f2SArne Jansen if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) 1538bcef60f2SArne Jansen return fs_info->quota_root ? fs_info->quota_root : 1539bcef60f2SArne Jansen ERR_PTR(-ENOENT); 15404df27c4dSYan, Zheng again: 15414df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 15425eda7b5eSChris Mason root = radix_tree_lookup(&fs_info->fs_roots_radix, 15435eda7b5eSChris Mason (unsigned long)location->objectid); 15444df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 15455eda7b5eSChris Mason if (root) 15465eda7b5eSChris Mason return root; 15475eda7b5eSChris Mason 1548e02119d5SChris Mason root = btrfs_read_fs_root_no_radix(fs_info->tree_root, location); 15495eda7b5eSChris Mason if (IS_ERR(root)) 15505eda7b5eSChris Mason return root; 15513394e160SChris Mason 1552581bb050SLi Zefan root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); 1553581bb050SLi Zefan root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), 1554581bb050SLi Zefan GFP_NOFS); 155535a30d7cSDavid Sterba if (!root->free_ino_pinned || !root->free_ino_ctl) { 155635a30d7cSDavid Sterba ret = -ENOMEM; 1557581bb050SLi Zefan goto fail; 155835a30d7cSDavid Sterba } 1559581bb050SLi Zefan 1560581bb050SLi Zefan btrfs_init_free_ino_ctl(root); 1561581bb050SLi Zefan mutex_init(&root->fs_commit_mutex); 1562581bb050SLi Zefan spin_lock_init(&root->cache_lock); 1563581bb050SLi Zefan init_waitqueue_head(&root->cache_wait); 1564581bb050SLi Zefan 15650ee5dc67SAl Viro ret = get_anon_bdev(&root->anon_dev); 1566ac08aedfSChris Mason if (ret) 1567ac08aedfSChris Mason goto fail; 15683394e160SChris Mason 1569d68fc57bSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) { 1570d68fc57bSYan, Zheng ret = -ENOENT; 1571d68fc57bSYan, Zheng goto fail; 1572d68fc57bSYan, Zheng } 1573d68fc57bSYan, Zheng 1574d68fc57bSYan, Zheng ret = btrfs_find_orphan_item(fs_info->tree_root, location->objectid); 1575d68fc57bSYan, Zheng if (ret < 0) 1576d68fc57bSYan, Zheng goto fail; 1577d68fc57bSYan, Zheng if (ret == 0) 1578d68fc57bSYan, Zheng root->orphan_item_inserted = 1; 1579d68fc57bSYan, Zheng 15804df27c4dSYan, Zheng ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); 15814df27c4dSYan, Zheng if (ret) 15824df27c4dSYan, Zheng goto fail; 15834df27c4dSYan, Zheng 15844df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 15852619ba1fSChris Mason ret = radix_tree_insert(&fs_info->fs_roots_radix, 15862619ba1fSChris Mason (unsigned long)root->root_key.objectid, 15870f7d52f4SChris Mason root); 1588d68fc57bSYan, Zheng if (ret == 0) 15894df27c4dSYan, Zheng root->in_radix = 1; 1590d68fc57bSYan, Zheng 15914df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 15924df27c4dSYan, Zheng radix_tree_preload_end(); 15930f7d52f4SChris Mason if (ret) { 15944df27c4dSYan, Zheng if (ret == -EEXIST) { 15954df27c4dSYan, Zheng free_fs_root(root); 15964df27c4dSYan, Zheng goto again; 15970f7d52f4SChris Mason } 15984df27c4dSYan, Zheng goto fail; 15994df27c4dSYan, Zheng } 16004df27c4dSYan, Zheng 1601edbd8d4eSChris Mason ret = btrfs_find_dead_roots(fs_info->tree_root, 16025d4f98a2SYan Zheng root->root_key.objectid); 16034df27c4dSYan, Zheng WARN_ON(ret); 1604edbd8d4eSChris Mason return root; 16054df27c4dSYan, Zheng fail: 16064df27c4dSYan, Zheng free_fs_root(root); 16074df27c4dSYan, Zheng return ERR_PTR(ret); 1608edbd8d4eSChris Mason } 1609edbd8d4eSChris Mason 161004160088SChris Mason static int btrfs_congested_fn(void *congested_data, int bdi_bits) 161104160088SChris Mason { 161204160088SChris Mason struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; 161304160088SChris Mason int ret = 0; 161404160088SChris Mason struct btrfs_device *device; 161504160088SChris Mason struct backing_dev_info *bdi; 1616b7967db7SChris Mason 16171f78160cSXiao Guangrong rcu_read_lock(); 16181f78160cSXiao Guangrong list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { 1619dfe25020SChris Mason if (!device->bdev) 1620dfe25020SChris Mason continue; 162104160088SChris Mason bdi = blk_get_backing_dev_info(device->bdev); 162204160088SChris Mason if (bdi && bdi_congested(bdi, bdi_bits)) { 162304160088SChris Mason ret = 1; 162404160088SChris Mason break; 162504160088SChris Mason } 162604160088SChris Mason } 16271f78160cSXiao Guangrong rcu_read_unlock(); 162804160088SChris Mason return ret; 162904160088SChris Mason } 163004160088SChris Mason 163138b66988SChris Mason /* 1632ad081f14SJens Axboe * If this fails, caller must call bdi_destroy() to get rid of the 1633ad081f14SJens Axboe * bdi again. 1634ad081f14SJens Axboe */ 163504160088SChris Mason static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) 163604160088SChris Mason { 1637ad081f14SJens Axboe int err; 1638ad081f14SJens Axboe 1639ad081f14SJens Axboe bdi->capabilities = BDI_CAP_MAP_COPY; 1640e6d086d8SJens Axboe err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY); 1641ad081f14SJens Axboe if (err) 1642ad081f14SJens Axboe return err; 1643ad081f14SJens Axboe 16444575c9ccSChris Mason bdi->ra_pages = default_backing_dev_info.ra_pages; 164504160088SChris Mason bdi->congested_fn = btrfs_congested_fn; 164604160088SChris Mason bdi->congested_data = info; 164704160088SChris Mason return 0; 164804160088SChris Mason } 164904160088SChris Mason 16508b712842SChris Mason /* 16518b712842SChris Mason * called by the kthread helper functions to finally call the bio end_io 16528b712842SChris Mason * functions. This is where read checksum verification actually happens 16538b712842SChris Mason */ 16548b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work) 1655ce9adaa5SChris Mason { 1656ce9adaa5SChris Mason struct bio *bio; 16578b712842SChris Mason struct end_io_wq *end_io_wq; 16588b712842SChris Mason struct btrfs_fs_info *fs_info; 1659ce9adaa5SChris Mason int error; 1660ce9adaa5SChris Mason 16618b712842SChris Mason end_io_wq = container_of(work, struct end_io_wq, work); 1662ce9adaa5SChris Mason bio = end_io_wq->bio; 16638b712842SChris Mason fs_info = end_io_wq->info; 16648b712842SChris Mason 1665ce9adaa5SChris Mason error = end_io_wq->error; 1666ce9adaa5SChris Mason bio->bi_private = end_io_wq->private; 1667ce9adaa5SChris Mason bio->bi_end_io = end_io_wq->end_io; 1668ce9adaa5SChris Mason kfree(end_io_wq); 1669ce9adaa5SChris Mason bio_endio(bio, error); 1670ce9adaa5SChris Mason } 167144b8bd7eSChris Mason 1672a74a4b97SChris Mason static int cleaner_kthread(void *arg) 1673a74a4b97SChris Mason { 1674a74a4b97SChris Mason struct btrfs_root *root = arg; 1675a74a4b97SChris Mason 1676a74a4b97SChris Mason do { 16779d1a2a3aSDavid Sterba int again = 0; 16789d1a2a3aSDavid Sterba 167976dda93cSYan, Zheng if (!(root->fs_info->sb->s_flags & MS_RDONLY) && 16809d1a2a3aSDavid Sterba down_read_trylock(&root->fs_info->sb->s_umount)) { 16819d1a2a3aSDavid Sterba if (mutex_trylock(&root->fs_info->cleaner_mutex)) { 168224bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 16839d1a2a3aSDavid Sterba again = btrfs_clean_one_deleted_snapshot(root); 1684a74a4b97SChris Mason mutex_unlock(&root->fs_info->cleaner_mutex); 16859d1a2a3aSDavid Sterba } 16864cb5300bSChris Mason btrfs_run_defrag_inodes(root->fs_info); 16879d1a2a3aSDavid Sterba up_read(&root->fs_info->sb->s_umount); 168876dda93cSYan, Zheng } 1689a74a4b97SChris Mason 16909d1a2a3aSDavid Sterba if (!try_to_freeze() && !again) { 1691a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 16928929ecfaSYan, Zheng if (!kthread_should_stop()) 1693a74a4b97SChris Mason schedule(); 1694a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1695a74a4b97SChris Mason } 1696a74a4b97SChris Mason } while (!kthread_should_stop()); 1697a74a4b97SChris Mason return 0; 1698a74a4b97SChris Mason } 1699a74a4b97SChris Mason 1700a74a4b97SChris Mason static int transaction_kthread(void *arg) 1701a74a4b97SChris Mason { 1702a74a4b97SChris Mason struct btrfs_root *root = arg; 1703a74a4b97SChris Mason struct btrfs_trans_handle *trans; 1704a74a4b97SChris Mason struct btrfs_transaction *cur; 17058929ecfaSYan, Zheng u64 transid; 1706a74a4b97SChris Mason unsigned long now; 1707a74a4b97SChris Mason unsigned long delay; 1708914b2007SJan Kara bool cannot_commit; 1709a74a4b97SChris Mason 1710a74a4b97SChris Mason do { 1711914b2007SJan Kara cannot_commit = false; 1712a74a4b97SChris Mason delay = HZ * 30; 1713a74a4b97SChris Mason mutex_lock(&root->fs_info->transaction_kthread_mutex); 1714a74a4b97SChris Mason 1715a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 1716a74a4b97SChris Mason cur = root->fs_info->running_transaction; 1717a74a4b97SChris Mason if (!cur) { 1718a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1719a74a4b97SChris Mason goto sleep; 1720a74a4b97SChris Mason } 172131153d81SYan Zheng 1722a74a4b97SChris Mason now = get_seconds(); 17238929ecfaSYan, Zheng if (!cur->blocked && 17248929ecfaSYan, Zheng (now < cur->start_time || now - cur->start_time < 30)) { 1725a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1726a74a4b97SChris Mason delay = HZ * 5; 1727a74a4b97SChris Mason goto sleep; 1728a74a4b97SChris Mason } 17298929ecfaSYan, Zheng transid = cur->transid; 1730a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 173156bec294SChris Mason 173279787eaaSJeff Mahoney /* If the file system is aborted, this will always fail. */ 1733354aa0fbSMiao Xie trans = btrfs_attach_transaction(root); 1734914b2007SJan Kara if (IS_ERR(trans)) { 1735354aa0fbSMiao Xie if (PTR_ERR(trans) != -ENOENT) 1736914b2007SJan Kara cannot_commit = true; 173779787eaaSJeff Mahoney goto sleep; 1738914b2007SJan Kara } 17398929ecfaSYan, Zheng if (transid == trans->transid) { 174079787eaaSJeff Mahoney btrfs_commit_transaction(trans, root); 17418929ecfaSYan, Zheng } else { 17428929ecfaSYan, Zheng btrfs_end_transaction(trans, root); 17438929ecfaSYan, Zheng } 1744a74a4b97SChris Mason sleep: 1745a74a4b97SChris Mason wake_up_process(root->fs_info->cleaner_kthread); 1746a74a4b97SChris Mason mutex_unlock(&root->fs_info->transaction_kthread_mutex); 1747a74a4b97SChris Mason 1748a0acae0eSTejun Heo if (!try_to_freeze()) { 1749a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 17508929ecfaSYan, Zheng if (!kthread_should_stop() && 1751914b2007SJan Kara (!btrfs_transaction_blocked(root->fs_info) || 1752914b2007SJan Kara cannot_commit)) 1753a74a4b97SChris Mason schedule_timeout(delay); 1754a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1755a74a4b97SChris Mason } 1756a74a4b97SChris Mason } while (!kthread_should_stop()); 1757a74a4b97SChris Mason return 0; 1758a74a4b97SChris Mason } 1759a74a4b97SChris Mason 1760af31f5e5SChris Mason /* 1761af31f5e5SChris Mason * this will find the highest generation in the array of 1762af31f5e5SChris Mason * root backups. The index of the highest array is returned, 1763af31f5e5SChris Mason * or -1 if we can't find anything. 1764af31f5e5SChris Mason * 1765af31f5e5SChris Mason * We check to make sure the array is valid by comparing the 1766af31f5e5SChris Mason * generation of the latest root in the array with the generation 1767af31f5e5SChris Mason * in the super block. If they don't match we pitch it. 1768af31f5e5SChris Mason */ 1769af31f5e5SChris Mason static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) 1770af31f5e5SChris Mason { 1771af31f5e5SChris Mason u64 cur; 1772af31f5e5SChris Mason int newest_index = -1; 1773af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1774af31f5e5SChris Mason int i; 1775af31f5e5SChris Mason 1776af31f5e5SChris Mason for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 1777af31f5e5SChris Mason root_backup = info->super_copy->super_roots + i; 1778af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1779af31f5e5SChris Mason if (cur == newest_gen) 1780af31f5e5SChris Mason newest_index = i; 1781af31f5e5SChris Mason } 1782af31f5e5SChris Mason 1783af31f5e5SChris Mason /* check to see if we actually wrapped around */ 1784af31f5e5SChris Mason if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { 1785af31f5e5SChris Mason root_backup = info->super_copy->super_roots; 1786af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1787af31f5e5SChris Mason if (cur == newest_gen) 1788af31f5e5SChris Mason newest_index = 0; 1789af31f5e5SChris Mason } 1790af31f5e5SChris Mason return newest_index; 1791af31f5e5SChris Mason } 1792af31f5e5SChris Mason 1793af31f5e5SChris Mason 1794af31f5e5SChris Mason /* 1795af31f5e5SChris Mason * find the oldest backup so we know where to store new entries 1796af31f5e5SChris Mason * in the backup array. This will set the backup_root_index 1797af31f5e5SChris Mason * field in the fs_info struct 1798af31f5e5SChris Mason */ 1799af31f5e5SChris Mason static void find_oldest_super_backup(struct btrfs_fs_info *info, 1800af31f5e5SChris Mason u64 newest_gen) 1801af31f5e5SChris Mason { 1802af31f5e5SChris Mason int newest_index = -1; 1803af31f5e5SChris Mason 1804af31f5e5SChris Mason newest_index = find_newest_super_backup(info, newest_gen); 1805af31f5e5SChris Mason /* if there was garbage in there, just move along */ 1806af31f5e5SChris Mason if (newest_index == -1) { 1807af31f5e5SChris Mason info->backup_root_index = 0; 1808af31f5e5SChris Mason } else { 1809af31f5e5SChris Mason info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; 1810af31f5e5SChris Mason } 1811af31f5e5SChris Mason } 1812af31f5e5SChris Mason 1813af31f5e5SChris Mason /* 1814af31f5e5SChris Mason * copy all the root pointers into the super backup array. 1815af31f5e5SChris Mason * this will bump the backup pointer by one when it is 1816af31f5e5SChris Mason * done 1817af31f5e5SChris Mason */ 1818af31f5e5SChris Mason static void backup_super_roots(struct btrfs_fs_info *info) 1819af31f5e5SChris Mason { 1820af31f5e5SChris Mason int next_backup; 1821af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1822af31f5e5SChris Mason int last_backup; 1823af31f5e5SChris Mason 1824af31f5e5SChris Mason next_backup = info->backup_root_index; 1825af31f5e5SChris Mason last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % 1826af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1827af31f5e5SChris Mason 1828af31f5e5SChris Mason /* 1829af31f5e5SChris Mason * just overwrite the last backup if we're at the same generation 1830af31f5e5SChris Mason * this happens only at umount 1831af31f5e5SChris Mason */ 1832af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + last_backup; 1833af31f5e5SChris Mason if (btrfs_backup_tree_root_gen(root_backup) == 1834af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)) 1835af31f5e5SChris Mason next_backup = last_backup; 1836af31f5e5SChris Mason 1837af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + next_backup; 1838af31f5e5SChris Mason 1839af31f5e5SChris Mason /* 1840af31f5e5SChris Mason * make sure all of our padding and empty slots get zero filled 1841af31f5e5SChris Mason * regardless of which ones we use today 1842af31f5e5SChris Mason */ 1843af31f5e5SChris Mason memset(root_backup, 0, sizeof(*root_backup)); 1844af31f5e5SChris Mason 1845af31f5e5SChris Mason info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; 1846af31f5e5SChris Mason 1847af31f5e5SChris Mason btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); 1848af31f5e5SChris Mason btrfs_set_backup_tree_root_gen(root_backup, 1849af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)); 1850af31f5e5SChris Mason 1851af31f5e5SChris Mason btrfs_set_backup_tree_root_level(root_backup, 1852af31f5e5SChris Mason btrfs_header_level(info->tree_root->node)); 1853af31f5e5SChris Mason 1854af31f5e5SChris Mason btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); 1855af31f5e5SChris Mason btrfs_set_backup_chunk_root_gen(root_backup, 1856af31f5e5SChris Mason btrfs_header_generation(info->chunk_root->node)); 1857af31f5e5SChris Mason btrfs_set_backup_chunk_root_level(root_backup, 1858af31f5e5SChris Mason btrfs_header_level(info->chunk_root->node)); 1859af31f5e5SChris Mason 1860af31f5e5SChris Mason btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); 1861af31f5e5SChris Mason btrfs_set_backup_extent_root_gen(root_backup, 1862af31f5e5SChris Mason btrfs_header_generation(info->extent_root->node)); 1863af31f5e5SChris Mason btrfs_set_backup_extent_root_level(root_backup, 1864af31f5e5SChris Mason btrfs_header_level(info->extent_root->node)); 1865af31f5e5SChris Mason 18667c7e82a7SChris Mason /* 18677c7e82a7SChris Mason * we might commit during log recovery, which happens before we set 18687c7e82a7SChris Mason * the fs_root. Make sure it is valid before we fill it in. 18697c7e82a7SChris Mason */ 18707c7e82a7SChris Mason if (info->fs_root && info->fs_root->node) { 18717c7e82a7SChris Mason btrfs_set_backup_fs_root(root_backup, 18727c7e82a7SChris Mason info->fs_root->node->start); 1873af31f5e5SChris Mason btrfs_set_backup_fs_root_gen(root_backup, 1874af31f5e5SChris Mason btrfs_header_generation(info->fs_root->node)); 1875af31f5e5SChris Mason btrfs_set_backup_fs_root_level(root_backup, 1876af31f5e5SChris Mason btrfs_header_level(info->fs_root->node)); 18777c7e82a7SChris Mason } 1878af31f5e5SChris Mason 1879af31f5e5SChris Mason btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); 1880af31f5e5SChris Mason btrfs_set_backup_dev_root_gen(root_backup, 1881af31f5e5SChris Mason btrfs_header_generation(info->dev_root->node)); 1882af31f5e5SChris Mason btrfs_set_backup_dev_root_level(root_backup, 1883af31f5e5SChris Mason btrfs_header_level(info->dev_root->node)); 1884af31f5e5SChris Mason 1885af31f5e5SChris Mason btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); 1886af31f5e5SChris Mason btrfs_set_backup_csum_root_gen(root_backup, 1887af31f5e5SChris Mason btrfs_header_generation(info->csum_root->node)); 1888af31f5e5SChris Mason btrfs_set_backup_csum_root_level(root_backup, 1889af31f5e5SChris Mason btrfs_header_level(info->csum_root->node)); 1890af31f5e5SChris Mason 1891af31f5e5SChris Mason btrfs_set_backup_total_bytes(root_backup, 1892af31f5e5SChris Mason btrfs_super_total_bytes(info->super_copy)); 1893af31f5e5SChris Mason btrfs_set_backup_bytes_used(root_backup, 1894af31f5e5SChris Mason btrfs_super_bytes_used(info->super_copy)); 1895af31f5e5SChris Mason btrfs_set_backup_num_devices(root_backup, 1896af31f5e5SChris Mason btrfs_super_num_devices(info->super_copy)); 1897af31f5e5SChris Mason 1898af31f5e5SChris Mason /* 1899af31f5e5SChris Mason * if we don't copy this out to the super_copy, it won't get remembered 1900af31f5e5SChris Mason * for the next commit 1901af31f5e5SChris Mason */ 1902af31f5e5SChris Mason memcpy(&info->super_copy->super_roots, 1903af31f5e5SChris Mason &info->super_for_commit->super_roots, 1904af31f5e5SChris Mason sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); 1905af31f5e5SChris Mason } 1906af31f5e5SChris Mason 1907af31f5e5SChris Mason /* 1908af31f5e5SChris Mason * this copies info out of the root backup array and back into 1909af31f5e5SChris Mason * the in-memory super block. It is meant to help iterate through 1910af31f5e5SChris Mason * the array, so you send it the number of backups you've already 1911af31f5e5SChris Mason * tried and the last backup index you used. 1912af31f5e5SChris Mason * 1913af31f5e5SChris Mason * this returns -1 when it has tried all the backups 1914af31f5e5SChris Mason */ 1915af31f5e5SChris Mason static noinline int next_root_backup(struct btrfs_fs_info *info, 1916af31f5e5SChris Mason struct btrfs_super_block *super, 1917af31f5e5SChris Mason int *num_backups_tried, int *backup_index) 1918af31f5e5SChris Mason { 1919af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1920af31f5e5SChris Mason int newest = *backup_index; 1921af31f5e5SChris Mason 1922af31f5e5SChris Mason if (*num_backups_tried == 0) { 1923af31f5e5SChris Mason u64 gen = btrfs_super_generation(super); 1924af31f5e5SChris Mason 1925af31f5e5SChris Mason newest = find_newest_super_backup(info, gen); 1926af31f5e5SChris Mason if (newest == -1) 1927af31f5e5SChris Mason return -1; 1928af31f5e5SChris Mason 1929af31f5e5SChris Mason *backup_index = newest; 1930af31f5e5SChris Mason *num_backups_tried = 1; 1931af31f5e5SChris Mason } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { 1932af31f5e5SChris Mason /* we've tried all the backups, all done */ 1933af31f5e5SChris Mason return -1; 1934af31f5e5SChris Mason } else { 1935af31f5e5SChris Mason /* jump to the next oldest backup */ 1936af31f5e5SChris Mason newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % 1937af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1938af31f5e5SChris Mason *backup_index = newest; 1939af31f5e5SChris Mason *num_backups_tried += 1; 1940af31f5e5SChris Mason } 1941af31f5e5SChris Mason root_backup = super->super_roots + newest; 1942af31f5e5SChris Mason 1943af31f5e5SChris Mason btrfs_set_super_generation(super, 1944af31f5e5SChris Mason btrfs_backup_tree_root_gen(root_backup)); 1945af31f5e5SChris Mason btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); 1946af31f5e5SChris Mason btrfs_set_super_root_level(super, 1947af31f5e5SChris Mason btrfs_backup_tree_root_level(root_backup)); 1948af31f5e5SChris Mason btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); 1949af31f5e5SChris Mason 1950af31f5e5SChris Mason /* 1951af31f5e5SChris Mason * fixme: the total bytes and num_devices need to match or we should 1952af31f5e5SChris Mason * need a fsck 1953af31f5e5SChris Mason */ 1954af31f5e5SChris Mason btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); 1955af31f5e5SChris Mason btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); 1956af31f5e5SChris Mason return 0; 1957af31f5e5SChris Mason } 1958af31f5e5SChris Mason 19597abadb64SLiu Bo /* helper to cleanup workers */ 19607abadb64SLiu Bo static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) 19617abadb64SLiu Bo { 19627abadb64SLiu Bo btrfs_stop_workers(&fs_info->generic_worker); 19637abadb64SLiu Bo btrfs_stop_workers(&fs_info->fixup_workers); 19647abadb64SLiu Bo btrfs_stop_workers(&fs_info->delalloc_workers); 19657abadb64SLiu Bo btrfs_stop_workers(&fs_info->workers); 19667abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_workers); 19677abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_meta_workers); 19687abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_raid56_workers); 19697abadb64SLiu Bo btrfs_stop_workers(&fs_info->rmw_workers); 19707abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_meta_write_workers); 19717abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_write_workers); 19727abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_freespace_worker); 19737abadb64SLiu Bo btrfs_stop_workers(&fs_info->submit_workers); 19747abadb64SLiu Bo btrfs_stop_workers(&fs_info->delayed_workers); 19757abadb64SLiu Bo btrfs_stop_workers(&fs_info->caching_workers); 19767abadb64SLiu Bo btrfs_stop_workers(&fs_info->readahead_workers); 19777abadb64SLiu Bo btrfs_stop_workers(&fs_info->flush_workers); 19782f232036SJan Schmidt btrfs_stop_workers(&fs_info->qgroup_rescan_workers); 19797abadb64SLiu Bo } 19807abadb64SLiu Bo 1981af31f5e5SChris Mason /* helper to cleanup tree roots */ 1982af31f5e5SChris Mason static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) 1983af31f5e5SChris Mason { 1984af31f5e5SChris Mason free_extent_buffer(info->tree_root->node); 1985af31f5e5SChris Mason free_extent_buffer(info->tree_root->commit_root); 1986af31f5e5SChris Mason free_extent_buffer(info->dev_root->node); 1987af31f5e5SChris Mason free_extent_buffer(info->dev_root->commit_root); 1988af31f5e5SChris Mason free_extent_buffer(info->extent_root->node); 1989af31f5e5SChris Mason free_extent_buffer(info->extent_root->commit_root); 1990af31f5e5SChris Mason free_extent_buffer(info->csum_root->node); 1991af31f5e5SChris Mason free_extent_buffer(info->csum_root->commit_root); 1992bcef60f2SArne Jansen if (info->quota_root) { 1993bcef60f2SArne Jansen free_extent_buffer(info->quota_root->node); 1994bcef60f2SArne Jansen free_extent_buffer(info->quota_root->commit_root); 1995bcef60f2SArne Jansen } 1996af31f5e5SChris Mason 1997af31f5e5SChris Mason info->tree_root->node = NULL; 1998af31f5e5SChris Mason info->tree_root->commit_root = NULL; 1999af31f5e5SChris Mason info->dev_root->node = NULL; 2000af31f5e5SChris Mason info->dev_root->commit_root = NULL; 2001af31f5e5SChris Mason info->extent_root->node = NULL; 2002af31f5e5SChris Mason info->extent_root->commit_root = NULL; 2003af31f5e5SChris Mason info->csum_root->node = NULL; 2004af31f5e5SChris Mason info->csum_root->commit_root = NULL; 2005bcef60f2SArne Jansen if (info->quota_root) { 2006bcef60f2SArne Jansen info->quota_root->node = NULL; 2007bcef60f2SArne Jansen info->quota_root->commit_root = NULL; 2008bcef60f2SArne Jansen } 2009af31f5e5SChris Mason 2010af31f5e5SChris Mason if (chunk_root) { 2011af31f5e5SChris Mason free_extent_buffer(info->chunk_root->node); 2012af31f5e5SChris Mason free_extent_buffer(info->chunk_root->commit_root); 2013af31f5e5SChris Mason info->chunk_root->node = NULL; 2014af31f5e5SChris Mason info->chunk_root->commit_root = NULL; 2015af31f5e5SChris Mason } 2016af31f5e5SChris Mason } 2017af31f5e5SChris Mason 2018171f6537SJosef Bacik static void del_fs_roots(struct btrfs_fs_info *fs_info) 2019171f6537SJosef Bacik { 2020171f6537SJosef Bacik int ret; 2021171f6537SJosef Bacik struct btrfs_root *gang[8]; 2022171f6537SJosef Bacik int i; 2023171f6537SJosef Bacik 2024171f6537SJosef Bacik while (!list_empty(&fs_info->dead_roots)) { 2025171f6537SJosef Bacik gang[0] = list_entry(fs_info->dead_roots.next, 2026171f6537SJosef Bacik struct btrfs_root, root_list); 2027171f6537SJosef Bacik list_del(&gang[0]->root_list); 2028171f6537SJosef Bacik 2029171f6537SJosef Bacik if (gang[0]->in_radix) { 2030171f6537SJosef Bacik btrfs_free_fs_root(fs_info, gang[0]); 2031171f6537SJosef Bacik } else { 2032171f6537SJosef Bacik free_extent_buffer(gang[0]->node); 2033171f6537SJosef Bacik free_extent_buffer(gang[0]->commit_root); 2034171f6537SJosef Bacik kfree(gang[0]); 2035171f6537SJosef Bacik } 2036171f6537SJosef Bacik } 2037171f6537SJosef Bacik 2038171f6537SJosef Bacik while (1) { 2039171f6537SJosef Bacik ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 2040171f6537SJosef Bacik (void **)gang, 0, 2041171f6537SJosef Bacik ARRAY_SIZE(gang)); 2042171f6537SJosef Bacik if (!ret) 2043171f6537SJosef Bacik break; 2044171f6537SJosef Bacik for (i = 0; i < ret; i++) 2045171f6537SJosef Bacik btrfs_free_fs_root(fs_info, gang[i]); 2046171f6537SJosef Bacik } 2047171f6537SJosef Bacik } 2048af31f5e5SChris Mason 2049ad2b2c80SAl Viro int open_ctree(struct super_block *sb, 2050dfe25020SChris Mason struct btrfs_fs_devices *fs_devices, 2051dfe25020SChris Mason char *options) 2052eb60ceacSChris Mason { 2053db94535dSChris Mason u32 sectorsize; 2054db94535dSChris Mason u32 nodesize; 2055db94535dSChris Mason u32 leafsize; 2056db94535dSChris Mason u32 blocksize; 205787ee04ebSChris Mason u32 stripesize; 205884234f3aSYan Zheng u64 generation; 2059f2b636e8SJosef Bacik u64 features; 20603de4586cSChris Mason struct btrfs_key location; 2061a061fc8dSChris Mason struct buffer_head *bh; 20624d34b278SIlya Dryomov struct btrfs_super_block *disk_super; 2063815745cfSAl Viro struct btrfs_fs_info *fs_info = btrfs_sb(sb); 2064f84a8bd6SAl Viro struct btrfs_root *tree_root; 20654d34b278SIlya Dryomov struct btrfs_root *extent_root; 20664d34b278SIlya Dryomov struct btrfs_root *csum_root; 20674d34b278SIlya Dryomov struct btrfs_root *chunk_root; 20684d34b278SIlya Dryomov struct btrfs_root *dev_root; 2069bcef60f2SArne Jansen struct btrfs_root *quota_root; 2070e02119d5SChris Mason struct btrfs_root *log_tree_root; 2071eb60ceacSChris Mason int ret; 2072e58ca020SYan int err = -EINVAL; 2073af31f5e5SChris Mason int num_backups_tried = 0; 2074af31f5e5SChris Mason int backup_index = 0; 20754543df7eSChris Mason 2076f84a8bd6SAl Viro tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info); 20776f07e42eSAl Viro extent_root = fs_info->extent_root = btrfs_alloc_root(fs_info); 20786f07e42eSAl Viro csum_root = fs_info->csum_root = btrfs_alloc_root(fs_info); 20796f07e42eSAl Viro chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info); 20806f07e42eSAl Viro dev_root = fs_info->dev_root = btrfs_alloc_root(fs_info); 2081bcef60f2SArne Jansen quota_root = fs_info->quota_root = btrfs_alloc_root(fs_info); 20828790d502SChris Mason 2083f84a8bd6SAl Viro if (!tree_root || !extent_root || !csum_root || 2084bcef60f2SArne Jansen !chunk_root || !dev_root || !quota_root) { 208539279cc3SChris Mason err = -ENOMEM; 208639279cc3SChris Mason goto fail; 208739279cc3SChris Mason } 208876dda93cSYan, Zheng 208976dda93cSYan, Zheng ret = init_srcu_struct(&fs_info->subvol_srcu); 209076dda93cSYan, Zheng if (ret) { 209176dda93cSYan, Zheng err = ret; 209276dda93cSYan, Zheng goto fail; 209376dda93cSYan, Zheng } 209476dda93cSYan, Zheng 209576dda93cSYan, Zheng ret = setup_bdi(fs_info, &fs_info->bdi); 209676dda93cSYan, Zheng if (ret) { 209776dda93cSYan, Zheng err = ret; 209876dda93cSYan, Zheng goto fail_srcu; 209976dda93cSYan, Zheng } 210076dda93cSYan, Zheng 2101e2d84521SMiao Xie ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0); 2102e2d84521SMiao Xie if (ret) { 2103e2d84521SMiao Xie err = ret; 2104e2d84521SMiao Xie goto fail_bdi; 2105e2d84521SMiao Xie } 2106e2d84521SMiao Xie fs_info->dirty_metadata_batch = PAGE_CACHE_SIZE * 2107e2d84521SMiao Xie (1 + ilog2(nr_cpu_ids)); 2108e2d84521SMiao Xie 2109963d678bSMiao Xie ret = percpu_counter_init(&fs_info->delalloc_bytes, 0); 2110963d678bSMiao Xie if (ret) { 2111963d678bSMiao Xie err = ret; 2112963d678bSMiao Xie goto fail_dirty_metadata_bytes; 2113963d678bSMiao Xie } 2114963d678bSMiao Xie 211576dda93cSYan, Zheng fs_info->btree_inode = new_inode(sb); 211676dda93cSYan, Zheng if (!fs_info->btree_inode) { 211776dda93cSYan, Zheng err = -ENOMEM; 2118963d678bSMiao Xie goto fail_delalloc_bytes; 211976dda93cSYan, Zheng } 212076dda93cSYan, Zheng 2121a6591715SChris Mason mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); 21221561dedaSMiao Xie 212376dda93cSYan, Zheng INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 21248fd17795SChris Mason INIT_LIST_HEAD(&fs_info->trans_list); 2125facda1e7SChris Mason INIT_LIST_HEAD(&fs_info->dead_roots); 212624bbcf04SYan, Zheng INIT_LIST_HEAD(&fs_info->delayed_iputs); 2127ea8c2819SChris Mason INIT_LIST_HEAD(&fs_info->delalloc_inodes); 212811833d66SYan Zheng INIT_LIST_HEAD(&fs_info->caching_block_groups); 21291832a6d5SChris Mason spin_lock_init(&fs_info->delalloc_lock); 2130a4abeea4SJosef Bacik spin_lock_init(&fs_info->trans_lock); 213176dda93cSYan, Zheng spin_lock_init(&fs_info->fs_roots_radix_lock); 213224bbcf04SYan, Zheng spin_lock_init(&fs_info->delayed_iput_lock); 21334cb5300bSChris Mason spin_lock_init(&fs_info->defrag_inodes_lock); 21342bf64758SJosef Bacik spin_lock_init(&fs_info->free_chunk_lock); 2135f29021b2SJan Schmidt spin_lock_init(&fs_info->tree_mod_seq_lock); 2136ceda0864SMiao Xie spin_lock_init(&fs_info->super_lock); 2137f29021b2SJan Schmidt rwlock_init(&fs_info->tree_mod_log_lock); 21387585717fSChris Mason mutex_init(&fs_info->reloc_mutex); 2139de98ced9SMiao Xie seqlock_init(&fs_info->profiles_lock); 214019c00ddcSChris Mason 214158176a96SJosef Bacik init_completion(&fs_info->kobj_unregister); 21420b86a832SChris Mason INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); 21436324fbf3SChris Mason INIT_LIST_HEAD(&fs_info->space_info); 2144f29021b2SJan Schmidt INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); 21450b86a832SChris Mason btrfs_mapping_init(&fs_info->mapping_tree); 214666d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->global_block_rsv, 214766d8f3ddSMiao Xie BTRFS_BLOCK_RSV_GLOBAL); 214866d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delalloc_block_rsv, 214966d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELALLOC); 215066d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); 215166d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); 215266d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); 215366d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delayed_block_rsv, 215466d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELOPS); 2155cb03c743SChris Mason atomic_set(&fs_info->nr_async_submits, 0); 2156771ed689SChris Mason atomic_set(&fs_info->async_delalloc_pages, 0); 21578c8bee1dSChris Mason atomic_set(&fs_info->async_submit_draining, 0); 21580986fe9eSChris Mason atomic_set(&fs_info->nr_async_bios, 0); 21594cb5300bSChris Mason atomic_set(&fs_info->defrag_running, 0); 2160fc36ed7eSJan Schmidt atomic64_set(&fs_info->tree_mod_seq, 0); 2161e20d96d6SChris Mason fs_info->sb = sb; 21626f568d35SChris Mason fs_info->max_inline = 8192 * 1024; 21639ed74f2dSJosef Bacik fs_info->metadata_ratio = 0; 21644cb5300bSChris Mason fs_info->defrag_inodes = RB_ROOT; 2165a4abeea4SJosef Bacik fs_info->trans_no_join = 0; 21662bf64758SJosef Bacik fs_info->free_chunk_space = 0; 2167f29021b2SJan Schmidt fs_info->tree_mod_log = RB_ROOT; 2168c8b97818SChris Mason 216990519d66SArne Jansen /* readahead state */ 217090519d66SArne Jansen INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT); 217190519d66SArne Jansen spin_lock_init(&fs_info->reada_lock); 21722c90e5d6SChris Mason 2173b34b086cSChris Mason fs_info->thread_pool_size = min_t(unsigned long, 2174b34b086cSChris Mason num_online_cpus() + 2, 8); 21750afbaf8cSChris Mason 21763eaa2885SChris Mason INIT_LIST_HEAD(&fs_info->ordered_extents); 21773eaa2885SChris Mason spin_lock_init(&fs_info->ordered_extent_lock); 217816cdcec7SMiao Xie fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), 217916cdcec7SMiao Xie GFP_NOFS); 218016cdcec7SMiao Xie if (!fs_info->delayed_root) { 218116cdcec7SMiao Xie err = -ENOMEM; 218216cdcec7SMiao Xie goto fail_iput; 218316cdcec7SMiao Xie } 218416cdcec7SMiao Xie btrfs_init_delayed_root(fs_info->delayed_root); 21853eaa2885SChris Mason 2186a2de733cSArne Jansen mutex_init(&fs_info->scrub_lock); 2187a2de733cSArne Jansen atomic_set(&fs_info->scrubs_running, 0); 2188a2de733cSArne Jansen atomic_set(&fs_info->scrub_pause_req, 0); 2189a2de733cSArne Jansen atomic_set(&fs_info->scrubs_paused, 0); 2190a2de733cSArne Jansen atomic_set(&fs_info->scrub_cancel_req, 0); 2191a2de733cSArne Jansen init_waitqueue_head(&fs_info->scrub_pause_wait); 2192a2de733cSArne Jansen init_rwsem(&fs_info->scrub_super_lock); 2193a2de733cSArne Jansen fs_info->scrub_workers_refcnt = 0; 219421adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 219521adbd5cSStefan Behrens fs_info->check_integrity_print_mask = 0; 219621adbd5cSStefan Behrens #endif 2197a2de733cSArne Jansen 2198c9e9f97bSIlya Dryomov spin_lock_init(&fs_info->balance_lock); 2199c9e9f97bSIlya Dryomov mutex_init(&fs_info->balance_mutex); 2200837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_running, 0); 2201837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_pause_req, 0); 2202a7e99c69SIlya Dryomov atomic_set(&fs_info->balance_cancel_req, 0); 2203c9e9f97bSIlya Dryomov fs_info->balance_ctl = NULL; 2204837d5b6eSIlya Dryomov init_waitqueue_head(&fs_info->balance_wait_q); 2205a061fc8dSChris Mason 22060afbaf8cSChris Mason sb->s_blocksize = 4096; 22070afbaf8cSChris Mason sb->s_blocksize_bits = blksize_bits(4096); 220832a88aa1SJens Axboe sb->s_bdi = &fs_info->bdi; 22090afbaf8cSChris Mason 221076dda93cSYan, Zheng fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; 2211bfe86848SMiklos Szeredi set_nlink(fs_info->btree_inode, 1); 22120afbaf8cSChris Mason /* 22130afbaf8cSChris Mason * we set the i_size on the btree inode to the max possible int. 22140afbaf8cSChris Mason * the real end of the address space is determined by all of 22150afbaf8cSChris Mason * the devices in the system 22160afbaf8cSChris Mason */ 22170afbaf8cSChris Mason fs_info->btree_inode->i_size = OFFSET_MAX; 2218d98237b3SChris Mason fs_info->btree_inode->i_mapping->a_ops = &btree_aops; 221904160088SChris Mason fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; 222004160088SChris Mason 22215d4f98a2SYan Zheng RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); 2222d1310b2eSChris Mason extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, 2223f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 22240b32f4bbSJosef Bacik BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; 2225a8067e02SDavid Sterba extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); 22260da5468fSChris Mason 2227d1310b2eSChris Mason BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; 2228d1310b2eSChris Mason 22290f7d52f4SChris Mason BTRFS_I(fs_info->btree_inode)->root = tree_root; 22300f7d52f4SChris Mason memset(&BTRFS_I(fs_info->btree_inode)->location, 0, 22310f7d52f4SChris Mason sizeof(struct btrfs_key)); 223272ac3c0dSJosef Bacik set_bit(BTRFS_INODE_DUMMY, 223372ac3c0dSJosef Bacik &BTRFS_I(fs_info->btree_inode)->runtime_flags); 223422b0ebdaSChris Mason insert_inode_hash(fs_info->btree_inode); 223539279cc3SChris Mason 2236e02119d5SChris Mason spin_lock_init(&fs_info->block_group_cache_lock); 22376bef4d31SEric Paris fs_info->block_group_cache_tree = RB_ROOT; 2238a1897fddSLiu Bo fs_info->first_logical_byte = (u64)-1; 2239925baeddSChris Mason 224011833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[0], 2241f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 224211833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[1], 2243f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 224411833d66SYan Zheng fs_info->pinned_extents = &fs_info->freed_extents[0]; 2245e6dcd2dcSChris Mason fs_info->do_barriers = 1; 2246f9295749SChris Mason 2247d98237b3SChris Mason 22485a3f23d5SChris Mason mutex_init(&fs_info->ordered_operations_mutex); 224930ae8467SChris Mason mutex_init(&fs_info->tree_log_mutex); 2250925baeddSChris Mason mutex_init(&fs_info->chunk_mutex); 2251925baeddSChris Mason mutex_init(&fs_info->transaction_kthread_mutex); 2252a74a4b97SChris Mason mutex_init(&fs_info->cleaner_mutex); 2253a74a4b97SChris Mason mutex_init(&fs_info->volume_mutex); 2254276e680dSYan Zheng init_rwsem(&fs_info->extent_commit_sem); 2255c71bf099SYan, Zheng init_rwsem(&fs_info->cleanup_work_sem); 225676dda93cSYan, Zheng init_rwsem(&fs_info->subvol_sem); 2257e922e087SStefan Behrens fs_info->dev_replace.lock_owner = 0; 2258e922e087SStefan Behrens atomic_set(&fs_info->dev_replace.nesting_level, 0); 2259e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); 2260e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock_management_lock); 2261e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock); 2262fa9c0d79SChris Mason 2263416ac51dSArne Jansen spin_lock_init(&fs_info->qgroup_lock); 2264f2f6ed3dSWang Shilong mutex_init(&fs_info->qgroup_ioctl_lock); 2265416ac51dSArne Jansen fs_info->qgroup_tree = RB_ROOT; 2266416ac51dSArne Jansen INIT_LIST_HEAD(&fs_info->dirty_qgroups); 2267416ac51dSArne Jansen fs_info->qgroup_seq = 1; 2268416ac51dSArne Jansen fs_info->quota_enabled = 0; 2269416ac51dSArne Jansen fs_info->pending_quota_state = 0; 22702f232036SJan Schmidt mutex_init(&fs_info->qgroup_rescan_lock); 2271416ac51dSArne Jansen 2272fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); 2273fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->data_alloc_cluster); 2274fa9c0d79SChris Mason 22757d9eb12cSChris Mason init_waitqueue_head(&fs_info->transaction_throttle); 22763768f368SChris Mason init_waitqueue_head(&fs_info->transaction_wait); 2277bb9c12c9SSage Weil init_waitqueue_head(&fs_info->transaction_blocked_wait); 22784854ddd0SChris Mason init_waitqueue_head(&fs_info->async_submit_wait); 22799a8dd150SChris Mason 228053b381b3SDavid Woodhouse ret = btrfs_alloc_stripe_hash_table(fs_info); 228153b381b3SDavid Woodhouse if (ret) { 228283c8266aSDavid Sterba err = ret; 228353b381b3SDavid Woodhouse goto fail_alloc; 228453b381b3SDavid Woodhouse } 228553b381b3SDavid Woodhouse 22860b86a832SChris Mason __setup_root(4096, 4096, 4096, 4096, tree_root, 22872c90e5d6SChris Mason fs_info, BTRFS_ROOT_TREE_OBJECTID); 22887eccb903SChris Mason 22893c4bb26bSChris Mason invalidate_bdev(fs_devices->latest_bdev); 22901104a885SDavid Sterba 22911104a885SDavid Sterba /* 22921104a885SDavid Sterba * Read super block and check the signature bytes only 22931104a885SDavid Sterba */ 2294a512bbf8SYan Zheng bh = btrfs_read_dev_super(fs_devices->latest_bdev); 229520b45077SDave Young if (!bh) { 229620b45077SDave Young err = -EINVAL; 229716cdcec7SMiao Xie goto fail_alloc; 229820b45077SDave Young } 229939279cc3SChris Mason 23001104a885SDavid Sterba /* 23011104a885SDavid Sterba * We want to check superblock checksum, the type is stored inside. 23021104a885SDavid Sterba * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k). 23031104a885SDavid Sterba */ 23041104a885SDavid Sterba if (btrfs_check_super_csum(bh->b_data)) { 23051104a885SDavid Sterba printk(KERN_ERR "btrfs: superblock checksum mismatch\n"); 23061104a885SDavid Sterba err = -EINVAL; 23071104a885SDavid Sterba goto fail_alloc; 23081104a885SDavid Sterba } 23091104a885SDavid Sterba 23101104a885SDavid Sterba /* 23111104a885SDavid Sterba * super_copy is zeroed at allocation time and we never touch the 23121104a885SDavid Sterba * following bytes up to INFO_SIZE, the checksum is calculated from 23131104a885SDavid Sterba * the whole block of INFO_SIZE 23141104a885SDavid Sterba */ 23156c41761fSDavid Sterba memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); 23166c41761fSDavid Sterba memcpy(fs_info->super_for_commit, fs_info->super_copy, 23176c41761fSDavid Sterba sizeof(*fs_info->super_for_commit)); 2318a061fc8dSChris Mason brelse(bh); 23195f39d397SChris Mason 23206c41761fSDavid Sterba memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); 23210b86a832SChris Mason 23221104a885SDavid Sterba ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); 23231104a885SDavid Sterba if (ret) { 23241104a885SDavid Sterba printk(KERN_ERR "btrfs: superblock contains fatal errors\n"); 23251104a885SDavid Sterba err = -EINVAL; 23261104a885SDavid Sterba goto fail_alloc; 23271104a885SDavid Sterba } 23281104a885SDavid Sterba 23296c41761fSDavid Sterba disk_super = fs_info->super_copy; 23300f7d52f4SChris Mason if (!btrfs_super_root(disk_super)) 233116cdcec7SMiao Xie goto fail_alloc; 23320f7d52f4SChris Mason 2333acce952bSliubo /* check FS state, whether FS is broken. */ 233487533c47SMiao Xie if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) 233587533c47SMiao Xie set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); 2336acce952bSliubo 233775e7cb7fSLiu Bo /* 2338af31f5e5SChris Mason * run through our array of backup supers and setup 2339af31f5e5SChris Mason * our ring pointer to the oldest one 2340af31f5e5SChris Mason */ 2341af31f5e5SChris Mason generation = btrfs_super_generation(disk_super); 2342af31f5e5SChris Mason find_oldest_super_backup(fs_info, generation); 2343af31f5e5SChris Mason 2344af31f5e5SChris Mason /* 234575e7cb7fSLiu Bo * In the long term, we'll store the compression type in the super 234675e7cb7fSLiu Bo * block, and it'll be used for per file compression control. 234775e7cb7fSLiu Bo */ 234875e7cb7fSLiu Bo fs_info->compress_type = BTRFS_COMPRESS_ZLIB; 234975e7cb7fSLiu Bo 23502b82032cSYan Zheng ret = btrfs_parse_options(tree_root, options); 23512b82032cSYan Zheng if (ret) { 23522b82032cSYan Zheng err = ret; 235316cdcec7SMiao Xie goto fail_alloc; 23542b82032cSYan Zheng } 2355dfe25020SChris Mason 2356f2b636e8SJosef Bacik features = btrfs_super_incompat_flags(disk_super) & 2357f2b636e8SJosef Bacik ~BTRFS_FEATURE_INCOMPAT_SUPP; 2358f2b636e8SJosef Bacik if (features) { 2359f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount because of " 2360f2b636e8SJosef Bacik "unsupported optional features (%Lx).\n", 236121380931SJoel Becker (unsigned long long)features); 2362f2b636e8SJosef Bacik err = -EINVAL; 236316cdcec7SMiao Xie goto fail_alloc; 2364f2b636e8SJosef Bacik } 2365f2b636e8SJosef Bacik 2366727011e0SChris Mason if (btrfs_super_leafsize(disk_super) != 2367727011e0SChris Mason btrfs_super_nodesize(disk_super)) { 2368727011e0SChris Mason printk(KERN_ERR "BTRFS: couldn't mount because metadata " 2369727011e0SChris Mason "blocksizes don't match. node %d leaf %d\n", 2370727011e0SChris Mason btrfs_super_nodesize(disk_super), 2371727011e0SChris Mason btrfs_super_leafsize(disk_super)); 2372727011e0SChris Mason err = -EINVAL; 2373727011e0SChris Mason goto fail_alloc; 2374727011e0SChris Mason } 2375727011e0SChris Mason if (btrfs_super_leafsize(disk_super) > BTRFS_MAX_METADATA_BLOCKSIZE) { 2376727011e0SChris Mason printk(KERN_ERR "BTRFS: couldn't mount because metadata " 2377727011e0SChris Mason "blocksize (%d) was too large\n", 2378727011e0SChris Mason btrfs_super_leafsize(disk_super)); 2379727011e0SChris Mason err = -EINVAL; 2380727011e0SChris Mason goto fail_alloc; 2381727011e0SChris Mason } 2382727011e0SChris Mason 23835d4f98a2SYan Zheng features = btrfs_super_incompat_flags(disk_super); 23845d4f98a2SYan Zheng features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; 238569e380d1SLi Zefan if (tree_root->fs_info->compress_type == BTRFS_COMPRESS_LZO) 2386a6fa6faeSLi Zefan features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; 2387727011e0SChris Mason 23883173a18fSJosef Bacik if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) 23893173a18fSJosef Bacik printk(KERN_ERR "btrfs: has skinny extents\n"); 23903173a18fSJosef Bacik 2391727011e0SChris Mason /* 2392727011e0SChris Mason * flag our filesystem as having big metadata blocks if 2393727011e0SChris Mason * they are bigger than the page size 2394727011e0SChris Mason */ 2395727011e0SChris Mason if (btrfs_super_leafsize(disk_super) > PAGE_CACHE_SIZE) { 2396727011e0SChris Mason if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) 2397727011e0SChris Mason printk(KERN_INFO "btrfs flagging fs with big metadata feature\n"); 2398727011e0SChris Mason features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; 2399727011e0SChris Mason } 2400727011e0SChris Mason 2401bc3f116fSChris Mason nodesize = btrfs_super_nodesize(disk_super); 2402bc3f116fSChris Mason leafsize = btrfs_super_leafsize(disk_super); 2403bc3f116fSChris Mason sectorsize = btrfs_super_sectorsize(disk_super); 2404bc3f116fSChris Mason stripesize = btrfs_super_stripesize(disk_super); 2405e2d84521SMiao Xie fs_info->dirty_metadata_batch = leafsize * (1 + ilog2(nr_cpu_ids)); 2406963d678bSMiao Xie fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); 2407bc3f116fSChris Mason 2408bc3f116fSChris Mason /* 2409bc3f116fSChris Mason * mixed block groups end up with duplicate but slightly offset 2410bc3f116fSChris Mason * extent buffers for the same range. It leads to corruptions 2411bc3f116fSChris Mason */ 2412bc3f116fSChris Mason if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && 2413bc3f116fSChris Mason (sectorsize != leafsize)) { 2414bc3f116fSChris Mason printk(KERN_WARNING "btrfs: unequal leaf/node/sector sizes " 2415bc3f116fSChris Mason "are not allowed for mixed block groups on %s\n", 2416bc3f116fSChris Mason sb->s_id); 2417bc3f116fSChris Mason goto fail_alloc; 2418bc3f116fSChris Mason } 2419bc3f116fSChris Mason 2420ceda0864SMiao Xie /* 2421ceda0864SMiao Xie * Needn't use the lock because there is no other task which will 2422ceda0864SMiao Xie * update the flag. 2423ceda0864SMiao Xie */ 24245d4f98a2SYan Zheng btrfs_set_super_incompat_flags(disk_super, features); 24255d4f98a2SYan Zheng 2426f2b636e8SJosef Bacik features = btrfs_super_compat_ro_flags(disk_super) & 2427f2b636e8SJosef Bacik ~BTRFS_FEATURE_COMPAT_RO_SUPP; 2428f2b636e8SJosef Bacik if (!(sb->s_flags & MS_RDONLY) && features) { 2429f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount RDWR because of " 2430f2b636e8SJosef Bacik "unsupported option features (%Lx).\n", 243121380931SJoel Becker (unsigned long long)features); 2432f2b636e8SJosef Bacik err = -EINVAL; 243316cdcec7SMiao Xie goto fail_alloc; 2434f2b636e8SJosef Bacik } 243561d92c32SChris Mason 243661d92c32SChris Mason btrfs_init_workers(&fs_info->generic_worker, 243761d92c32SChris Mason "genwork", 1, NULL); 243861d92c32SChris Mason 24395443be45SChris Mason btrfs_init_workers(&fs_info->workers, "worker", 244061d92c32SChris Mason fs_info->thread_pool_size, 244161d92c32SChris Mason &fs_info->generic_worker); 2442c8b97818SChris Mason 2443771ed689SChris Mason btrfs_init_workers(&fs_info->delalloc_workers, "delalloc", 244461d92c32SChris Mason fs_info->thread_pool_size, 244561d92c32SChris Mason &fs_info->generic_worker); 2446771ed689SChris Mason 24478ccf6f19SMiao Xie btrfs_init_workers(&fs_info->flush_workers, "flush_delalloc", 24488ccf6f19SMiao Xie fs_info->thread_pool_size, 24498ccf6f19SMiao Xie &fs_info->generic_worker); 24508ccf6f19SMiao Xie 24515443be45SChris Mason btrfs_init_workers(&fs_info->submit_workers, "submit", 2452b720d209SChris Mason min_t(u64, fs_devices->num_devices, 245361d92c32SChris Mason fs_info->thread_pool_size), 245461d92c32SChris Mason &fs_info->generic_worker); 245561b49440SChris Mason 2456bab39bf9SJosef Bacik btrfs_init_workers(&fs_info->caching_workers, "cache", 2457bab39bf9SJosef Bacik 2, &fs_info->generic_worker); 2458bab39bf9SJosef Bacik 245961b49440SChris Mason /* a higher idle thresh on the submit workers makes it much more 246061b49440SChris Mason * likely that bios will be send down in a sane order to the 246161b49440SChris Mason * devices 246261b49440SChris Mason */ 246361b49440SChris Mason fs_info->submit_workers.idle_thresh = 64; 246453863232SChris Mason 2465771ed689SChris Mason fs_info->workers.idle_thresh = 16; 24664a69a410SChris Mason fs_info->workers.ordered = 1; 246761b49440SChris Mason 2468771ed689SChris Mason fs_info->delalloc_workers.idle_thresh = 2; 2469771ed689SChris Mason fs_info->delalloc_workers.ordered = 1; 2470771ed689SChris Mason 247161d92c32SChris Mason btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1, 247261d92c32SChris Mason &fs_info->generic_worker); 24735443be45SChris Mason btrfs_init_workers(&fs_info->endio_workers, "endio", 247461d92c32SChris Mason fs_info->thread_pool_size, 247561d92c32SChris Mason &fs_info->generic_worker); 2476d20f7043SChris Mason btrfs_init_workers(&fs_info->endio_meta_workers, "endio-meta", 247761d92c32SChris Mason fs_info->thread_pool_size, 247861d92c32SChris Mason &fs_info->generic_worker); 2479cad321adSChris Mason btrfs_init_workers(&fs_info->endio_meta_write_workers, 248061d92c32SChris Mason "endio-meta-write", fs_info->thread_pool_size, 248161d92c32SChris Mason &fs_info->generic_worker); 248253b381b3SDavid Woodhouse btrfs_init_workers(&fs_info->endio_raid56_workers, 248353b381b3SDavid Woodhouse "endio-raid56", fs_info->thread_pool_size, 248453b381b3SDavid Woodhouse &fs_info->generic_worker); 248553b381b3SDavid Woodhouse btrfs_init_workers(&fs_info->rmw_workers, 248653b381b3SDavid Woodhouse "rmw", fs_info->thread_pool_size, 248753b381b3SDavid Woodhouse &fs_info->generic_worker); 24885443be45SChris Mason btrfs_init_workers(&fs_info->endio_write_workers, "endio-write", 248961d92c32SChris Mason fs_info->thread_pool_size, 249061d92c32SChris Mason &fs_info->generic_worker); 24910cb59c99SJosef Bacik btrfs_init_workers(&fs_info->endio_freespace_worker, "freespace-write", 24920cb59c99SJosef Bacik 1, &fs_info->generic_worker); 249316cdcec7SMiao Xie btrfs_init_workers(&fs_info->delayed_workers, "delayed-meta", 249416cdcec7SMiao Xie fs_info->thread_pool_size, 249516cdcec7SMiao Xie &fs_info->generic_worker); 249690519d66SArne Jansen btrfs_init_workers(&fs_info->readahead_workers, "readahead", 249790519d66SArne Jansen fs_info->thread_pool_size, 249890519d66SArne Jansen &fs_info->generic_worker); 24992f232036SJan Schmidt btrfs_init_workers(&fs_info->qgroup_rescan_workers, "qgroup-rescan", 1, 25002f232036SJan Schmidt &fs_info->generic_worker); 250161b49440SChris Mason 250261b49440SChris Mason /* 250361b49440SChris Mason * endios are largely parallel and should have a very 250461b49440SChris Mason * low idle thresh 250561b49440SChris Mason */ 250661b49440SChris Mason fs_info->endio_workers.idle_thresh = 4; 2507b51912c9SChris Mason fs_info->endio_meta_workers.idle_thresh = 4; 250853b381b3SDavid Woodhouse fs_info->endio_raid56_workers.idle_thresh = 4; 250953b381b3SDavid Woodhouse fs_info->rmw_workers.idle_thresh = 2; 2510b51912c9SChris Mason 25119042846bSChris Mason fs_info->endio_write_workers.idle_thresh = 2; 25129042846bSChris Mason fs_info->endio_meta_write_workers.idle_thresh = 2; 251390519d66SArne Jansen fs_info->readahead_workers.idle_thresh = 2; 25149042846bSChris Mason 25150dc3b84aSJosef Bacik /* 25160dc3b84aSJosef Bacik * btrfs_start_workers can really only fail because of ENOMEM so just 25170dc3b84aSJosef Bacik * return -ENOMEM if any of these fail. 25180dc3b84aSJosef Bacik */ 25190dc3b84aSJosef Bacik ret = btrfs_start_workers(&fs_info->workers); 25200dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->generic_worker); 25210dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->submit_workers); 25220dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delalloc_workers); 25230dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->fixup_workers); 25240dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_workers); 25250dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_workers); 252653b381b3SDavid Woodhouse ret |= btrfs_start_workers(&fs_info->rmw_workers); 252753b381b3SDavid Woodhouse ret |= btrfs_start_workers(&fs_info->endio_raid56_workers); 25280dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_write_workers); 25290dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_write_workers); 25300dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_freespace_worker); 25310dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delayed_workers); 25320dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->caching_workers); 25330dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->readahead_workers); 25348ccf6f19SMiao Xie ret |= btrfs_start_workers(&fs_info->flush_workers); 25352f232036SJan Schmidt ret |= btrfs_start_workers(&fs_info->qgroup_rescan_workers); 25360dc3b84aSJosef Bacik if (ret) { 2537fed425c7SIlya Dryomov err = -ENOMEM; 25380dc3b84aSJosef Bacik goto fail_sb_buffer; 25390dc3b84aSJosef Bacik } 25404543df7eSChris Mason 25414575c9ccSChris Mason fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); 2542c8b97818SChris Mason fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, 2543c8b97818SChris Mason 4 * 1024 * 1024 / PAGE_CACHE_SIZE); 25444575c9ccSChris Mason 2545db94535dSChris Mason tree_root->nodesize = nodesize; 2546db94535dSChris Mason tree_root->leafsize = leafsize; 2547db94535dSChris Mason tree_root->sectorsize = sectorsize; 254887ee04ebSChris Mason tree_root->stripesize = stripesize; 2549a061fc8dSChris Mason 2550a061fc8dSChris Mason sb->s_blocksize = sectorsize; 2551a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(sectorsize); 2552db94535dSChris Mason 2553cdb4c574SZach Brown if (disk_super->magic != cpu_to_le64(BTRFS_MAGIC)) { 2554d397712bSChris Mason printk(KERN_INFO "btrfs: valid FS not found on %s\n", sb->s_id); 255539279cc3SChris Mason goto fail_sb_buffer; 255639279cc3SChris Mason } 255719c00ddcSChris Mason 25588d082fb7SLiu Bo if (sectorsize != PAGE_SIZE) { 25598d082fb7SLiu Bo printk(KERN_WARNING "btrfs: Incompatible sector size(%lu) " 25608d082fb7SLiu Bo "found on %s\n", (unsigned long)sectorsize, sb->s_id); 2561941b2ddfSKeith Mannthey goto fail_sb_buffer; 2562941b2ddfSKeith Mannthey } 2563941b2ddfSKeith Mannthey 2564925baeddSChris Mason mutex_lock(&fs_info->chunk_mutex); 2565e4404d6eSYan Zheng ret = btrfs_read_sys_array(tree_root); 2566925baeddSChris Mason mutex_unlock(&fs_info->chunk_mutex); 256784eed90fSChris Mason if (ret) { 2568d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read the system " 2569d397712bSChris Mason "array on %s\n", sb->s_id); 25705d4f98a2SYan Zheng goto fail_sb_buffer; 257184eed90fSChris Mason } 25720b86a832SChris Mason 25730b86a832SChris Mason blocksize = btrfs_level_size(tree_root, 25740b86a832SChris Mason btrfs_super_chunk_root_level(disk_super)); 257584234f3aSYan Zheng generation = btrfs_super_chunk_root_generation(disk_super); 25760b86a832SChris Mason 25770b86a832SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 25780b86a832SChris Mason chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); 25790b86a832SChris Mason 25800b86a832SChris Mason chunk_root->node = read_tree_block(chunk_root, 25810b86a832SChris Mason btrfs_super_chunk_root(disk_super), 258284234f3aSYan Zheng blocksize, generation); 2583416bc658SJosef Bacik if (!chunk_root->node || 2584416bc658SJosef Bacik !test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { 258583121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n", 258683121942SDavid Woodhouse sb->s_id); 2587af31f5e5SChris Mason goto fail_tree_roots; 258883121942SDavid Woodhouse } 25895d4f98a2SYan Zheng btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); 25905d4f98a2SYan Zheng chunk_root->commit_root = btrfs_root_node(chunk_root); 25910b86a832SChris Mason 2592e17cade2SChris Mason read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, 2593e17cade2SChris Mason (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node), 2594e17cade2SChris Mason BTRFS_UUID_SIZE); 2595e17cade2SChris Mason 25960b86a832SChris Mason ret = btrfs_read_chunk_tree(chunk_root); 25972b82032cSYan Zheng if (ret) { 2598d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read chunk tree on %s\n", 2599d397712bSChris Mason sb->s_id); 2600af31f5e5SChris Mason goto fail_tree_roots; 26012b82032cSYan Zheng } 26020b86a832SChris Mason 26038dabb742SStefan Behrens /* 26048dabb742SStefan Behrens * keep the device that is marked to be the target device for the 26058dabb742SStefan Behrens * dev_replace procedure 26068dabb742SStefan Behrens */ 26078dabb742SStefan Behrens btrfs_close_extra_devices(fs_info, fs_devices, 0); 2608dfe25020SChris Mason 2609a6b0d5c8SChris Mason if (!fs_devices->latest_bdev) { 2610a6b0d5c8SChris Mason printk(KERN_CRIT "btrfs: failed to read devices on %s\n", 2611a6b0d5c8SChris Mason sb->s_id); 2612a6b0d5c8SChris Mason goto fail_tree_roots; 2613a6b0d5c8SChris Mason } 2614a6b0d5c8SChris Mason 2615af31f5e5SChris Mason retry_root_backup: 2616db94535dSChris Mason blocksize = btrfs_level_size(tree_root, 2617db94535dSChris Mason btrfs_super_root_level(disk_super)); 261884234f3aSYan Zheng generation = btrfs_super_generation(disk_super); 26190b86a832SChris Mason 2620e20d96d6SChris Mason tree_root->node = read_tree_block(tree_root, 2621db94535dSChris Mason btrfs_super_root(disk_super), 262284234f3aSYan Zheng blocksize, generation); 2623af31f5e5SChris Mason if (!tree_root->node || 2624af31f5e5SChris Mason !test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) { 262583121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read tree root on %s\n", 262683121942SDavid Woodhouse sb->s_id); 2627af31f5e5SChris Mason 2628af31f5e5SChris Mason goto recovery_tree_root; 262983121942SDavid Woodhouse } 2630af31f5e5SChris Mason 26315d4f98a2SYan Zheng btrfs_set_root_node(&tree_root->root_item, tree_root->node); 26325d4f98a2SYan Zheng tree_root->commit_root = btrfs_root_node(tree_root); 2633db94535dSChris Mason 2634db94535dSChris Mason ret = find_and_setup_root(tree_root, fs_info, 2635e20d96d6SChris Mason BTRFS_EXTENT_TREE_OBJECTID, extent_root); 26360b86a832SChris Mason if (ret) 2637af31f5e5SChris Mason goto recovery_tree_root; 26380b86a832SChris Mason extent_root->track_dirty = 1; 26390b86a832SChris Mason 26400b86a832SChris Mason ret = find_and_setup_root(tree_root, fs_info, 26410b86a832SChris Mason BTRFS_DEV_TREE_OBJECTID, dev_root); 26420b86a832SChris Mason if (ret) 2643af31f5e5SChris Mason goto recovery_tree_root; 26445d4f98a2SYan Zheng dev_root->track_dirty = 1; 26453768f368SChris Mason 2646d20f7043SChris Mason ret = find_and_setup_root(tree_root, fs_info, 2647d20f7043SChris Mason BTRFS_CSUM_TREE_OBJECTID, csum_root); 2648d20f7043SChris Mason if (ret) 2649af31f5e5SChris Mason goto recovery_tree_root; 2650d20f7043SChris Mason csum_root->track_dirty = 1; 2651d20f7043SChris Mason 2652bcef60f2SArne Jansen ret = find_and_setup_root(tree_root, fs_info, 2653bcef60f2SArne Jansen BTRFS_QUOTA_TREE_OBJECTID, quota_root); 2654bcef60f2SArne Jansen if (ret) { 2655bcef60f2SArne Jansen kfree(quota_root); 2656bcef60f2SArne Jansen quota_root = fs_info->quota_root = NULL; 2657bcef60f2SArne Jansen } else { 2658bcef60f2SArne Jansen quota_root->track_dirty = 1; 2659bcef60f2SArne Jansen fs_info->quota_enabled = 1; 2660bcef60f2SArne Jansen fs_info->pending_quota_state = 1; 2661bcef60f2SArne Jansen } 2662bcef60f2SArne Jansen 26638929ecfaSYan, Zheng fs_info->generation = generation; 26648929ecfaSYan, Zheng fs_info->last_trans_committed = generation; 26658929ecfaSYan, Zheng 266668310a5eSIlya Dryomov ret = btrfs_recover_balance(fs_info); 266768310a5eSIlya Dryomov if (ret) { 266868310a5eSIlya Dryomov printk(KERN_WARNING "btrfs: failed to recover balance\n"); 266968310a5eSIlya Dryomov goto fail_block_groups; 267068310a5eSIlya Dryomov } 267168310a5eSIlya Dryomov 2672733f4fbbSStefan Behrens ret = btrfs_init_dev_stats(fs_info); 2673733f4fbbSStefan Behrens if (ret) { 2674733f4fbbSStefan Behrens printk(KERN_ERR "btrfs: failed to init dev_stats: %d\n", 2675733f4fbbSStefan Behrens ret); 2676733f4fbbSStefan Behrens goto fail_block_groups; 2677733f4fbbSStefan Behrens } 2678733f4fbbSStefan Behrens 26798dabb742SStefan Behrens ret = btrfs_init_dev_replace(fs_info); 26808dabb742SStefan Behrens if (ret) { 26818dabb742SStefan Behrens pr_err("btrfs: failed to init dev_replace: %d\n", ret); 26828dabb742SStefan Behrens goto fail_block_groups; 26838dabb742SStefan Behrens } 26848dabb742SStefan Behrens 26858dabb742SStefan Behrens btrfs_close_extra_devices(fs_info, fs_devices, 1); 26868dabb742SStefan Behrens 2687c59021f8Sliubo ret = btrfs_init_space_info(fs_info); 2688c59021f8Sliubo if (ret) { 2689c59021f8Sliubo printk(KERN_ERR "Failed to initial space info: %d\n", ret); 2690c59021f8Sliubo goto fail_block_groups; 2691c59021f8Sliubo } 2692c59021f8Sliubo 26931b1d1f66SJosef Bacik ret = btrfs_read_block_groups(extent_root); 26941b1d1f66SJosef Bacik if (ret) { 26951b1d1f66SJosef Bacik printk(KERN_ERR "Failed to read block groups: %d\n", ret); 26961b1d1f66SJosef Bacik goto fail_block_groups; 26971b1d1f66SJosef Bacik } 26985af3e8ccSStefan Behrens fs_info->num_tolerated_disk_barrier_failures = 26995af3e8ccSStefan Behrens btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); 2700292fd7fcSStefan Behrens if (fs_info->fs_devices->missing_devices > 2701292fd7fcSStefan Behrens fs_info->num_tolerated_disk_barrier_failures && 2702292fd7fcSStefan Behrens !(sb->s_flags & MS_RDONLY)) { 2703292fd7fcSStefan Behrens printk(KERN_WARNING 2704292fd7fcSStefan Behrens "Btrfs: too many missing devices, writeable mount is not allowed\n"); 2705292fd7fcSStefan Behrens goto fail_block_groups; 2706292fd7fcSStefan Behrens } 27079078a3e1SChris Mason 2708a74a4b97SChris Mason fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 2709a74a4b97SChris Mason "btrfs-cleaner"); 271057506d50SQinghuang Feng if (IS_ERR(fs_info->cleaner_kthread)) 27111b1d1f66SJosef Bacik goto fail_block_groups; 2712a74a4b97SChris Mason 2713a74a4b97SChris Mason fs_info->transaction_kthread = kthread_run(transaction_kthread, 2714a74a4b97SChris Mason tree_root, 2715a74a4b97SChris Mason "btrfs-transaction"); 271657506d50SQinghuang Feng if (IS_ERR(fs_info->transaction_kthread)) 27173f157a2fSChris Mason goto fail_cleaner; 2718a74a4b97SChris Mason 2719c289811cSChris Mason if (!btrfs_test_opt(tree_root, SSD) && 2720c289811cSChris Mason !btrfs_test_opt(tree_root, NOSSD) && 2721c289811cSChris Mason !fs_info->fs_devices->rotating) { 2722c289811cSChris Mason printk(KERN_INFO "Btrfs detected SSD devices, enabling SSD " 2723c289811cSChris Mason "mode\n"); 2724c289811cSChris Mason btrfs_set_opt(fs_info->mount_opt, SSD); 2725c289811cSChris Mason } 2726c289811cSChris Mason 272721adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 272821adbd5cSStefan Behrens if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { 272921adbd5cSStefan Behrens ret = btrfsic_mount(tree_root, fs_devices, 273021adbd5cSStefan Behrens btrfs_test_opt(tree_root, 273121adbd5cSStefan Behrens CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? 273221adbd5cSStefan Behrens 1 : 0, 273321adbd5cSStefan Behrens fs_info->check_integrity_print_mask); 273421adbd5cSStefan Behrens if (ret) 273521adbd5cSStefan Behrens printk(KERN_WARNING "btrfs: failed to initialize" 273621adbd5cSStefan Behrens " integrity check module %s\n", sb->s_id); 273721adbd5cSStefan Behrens } 273821adbd5cSStefan Behrens #endif 2739bcef60f2SArne Jansen ret = btrfs_read_qgroup_config(fs_info); 2740bcef60f2SArne Jansen if (ret) 2741bcef60f2SArne Jansen goto fail_trans_kthread; 274221adbd5cSStefan Behrens 2743acce952bSliubo /* do not make disk changes in broken FS */ 274468ce9682SStefan Behrens if (btrfs_super_log_root(disk_super) != 0) { 2745e02119d5SChris Mason u64 bytenr = btrfs_super_log_root(disk_super); 2746d18a2c44SChris Mason 27477c2ca468SChris Mason if (fs_devices->rw_devices == 0) { 2748d397712bSChris Mason printk(KERN_WARNING "Btrfs log replay required " 2749d397712bSChris Mason "on RO media\n"); 27507c2ca468SChris Mason err = -EIO; 2751bcef60f2SArne Jansen goto fail_qgroup; 27527c2ca468SChris Mason } 2753e02119d5SChris Mason blocksize = 2754e02119d5SChris Mason btrfs_level_size(tree_root, 2755e02119d5SChris Mason btrfs_super_log_root_level(disk_super)); 2756e02119d5SChris Mason 27576f07e42eSAl Viro log_tree_root = btrfs_alloc_root(fs_info); 2758676e4c86SDan Carpenter if (!log_tree_root) { 2759676e4c86SDan Carpenter err = -ENOMEM; 2760bcef60f2SArne Jansen goto fail_qgroup; 2761676e4c86SDan Carpenter } 2762e02119d5SChris Mason 2763e02119d5SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 2764e02119d5SChris Mason log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); 2765e02119d5SChris Mason 2766e02119d5SChris Mason log_tree_root->node = read_tree_block(tree_root, bytenr, 276784234f3aSYan Zheng blocksize, 276884234f3aSYan Zheng generation + 1); 2769416bc658SJosef Bacik if (!log_tree_root->node || 2770416bc658SJosef Bacik !extent_buffer_uptodate(log_tree_root->node)) { 2771416bc658SJosef Bacik printk(KERN_ERR "btrfs: failed to read log tree\n"); 2772416bc658SJosef Bacik free_extent_buffer(log_tree_root->node); 2773416bc658SJosef Bacik kfree(log_tree_root); 2774416bc658SJosef Bacik goto fail_trans_kthread; 2775416bc658SJosef Bacik } 277679787eaaSJeff Mahoney /* returns with log_tree_root freed on success */ 2777e02119d5SChris Mason ret = btrfs_recover_log_trees(log_tree_root); 277879787eaaSJeff Mahoney if (ret) { 277979787eaaSJeff Mahoney btrfs_error(tree_root->fs_info, ret, 278079787eaaSJeff Mahoney "Failed to recover log tree"); 278179787eaaSJeff Mahoney free_extent_buffer(log_tree_root->node); 278279787eaaSJeff Mahoney kfree(log_tree_root); 278379787eaaSJeff Mahoney goto fail_trans_kthread; 278479787eaaSJeff Mahoney } 2785e556ce2cSYan Zheng 2786e556ce2cSYan Zheng if (sb->s_flags & MS_RDONLY) { 2787e556ce2cSYan Zheng ret = btrfs_commit_super(tree_root); 278879787eaaSJeff Mahoney if (ret) 278979787eaaSJeff Mahoney goto fail_trans_kthread; 2790e556ce2cSYan Zheng } 2791e02119d5SChris Mason } 27921a40e23bSZheng Yan 279376dda93cSYan, Zheng ret = btrfs_find_orphan_roots(tree_root); 279479787eaaSJeff Mahoney if (ret) 279579787eaaSJeff Mahoney goto fail_trans_kthread; 279676dda93cSYan, Zheng 27977c2ca468SChris Mason if (!(sb->s_flags & MS_RDONLY)) { 2798d68fc57bSYan, Zheng ret = btrfs_cleanup_fs_roots(fs_info); 279944c44af2SIlya Dryomov if (ret) 280044c44af2SIlya Dryomov goto fail_trans_kthread; 2801d68fc57bSYan, Zheng 28025d4f98a2SYan Zheng ret = btrfs_recover_relocation(tree_root); 2803d7ce5843SMiao Xie if (ret < 0) { 2804d7ce5843SMiao Xie printk(KERN_WARNING 2805d7ce5843SMiao Xie "btrfs: failed to recover relocation\n"); 2806d7ce5843SMiao Xie err = -EINVAL; 2807bcef60f2SArne Jansen goto fail_qgroup; 2808d7ce5843SMiao Xie } 28097c2ca468SChris Mason } 28101a40e23bSZheng Yan 28113de4586cSChris Mason location.objectid = BTRFS_FS_TREE_OBJECTID; 28123de4586cSChris Mason location.type = BTRFS_ROOT_ITEM_KEY; 28133de4586cSChris Mason location.offset = (u64)-1; 28143de4586cSChris Mason 28153de4586cSChris Mason fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); 28163de4586cSChris Mason if (!fs_info->fs_root) 2817bcef60f2SArne Jansen goto fail_qgroup; 28183140c9a3SDan Carpenter if (IS_ERR(fs_info->fs_root)) { 28193140c9a3SDan Carpenter err = PTR_ERR(fs_info->fs_root); 2820bcef60f2SArne Jansen goto fail_qgroup; 28213140c9a3SDan Carpenter } 2822c289811cSChris Mason 28232b6ba629SIlya Dryomov if (sb->s_flags & MS_RDONLY) 28242b6ba629SIlya Dryomov return 0; 28252b6ba629SIlya Dryomov 2826e3acc2a6SJosef Bacik down_read(&fs_info->cleanup_work_sem); 28272b6ba629SIlya Dryomov if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || 28282b6ba629SIlya Dryomov (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { 28292b6ba629SIlya Dryomov up_read(&fs_info->cleanup_work_sem); 28302b6ba629SIlya Dryomov close_ctree(tree_root); 28312b6ba629SIlya Dryomov return ret; 28322b6ba629SIlya Dryomov } 2833e3acc2a6SJosef Bacik up_read(&fs_info->cleanup_work_sem); 283459641015SIlya Dryomov 28352b6ba629SIlya Dryomov ret = btrfs_resume_balance_async(fs_info); 28362b6ba629SIlya Dryomov if (ret) { 28372b6ba629SIlya Dryomov printk(KERN_WARNING "btrfs: failed to resume balance\n"); 283866b4ffd1SJosef Bacik close_ctree(tree_root); 28392b6ba629SIlya Dryomov return ret; 2840e3acc2a6SJosef Bacik } 2841e3acc2a6SJosef Bacik 28428dabb742SStefan Behrens ret = btrfs_resume_dev_replace_async(fs_info); 28438dabb742SStefan Behrens if (ret) { 28448dabb742SStefan Behrens pr_warn("btrfs: failed to resume dev_replace\n"); 28458dabb742SStefan Behrens close_ctree(tree_root); 28468dabb742SStefan Behrens return ret; 28478dabb742SStefan Behrens } 28488dabb742SStefan Behrens 2849ad2b2c80SAl Viro return 0; 285039279cc3SChris Mason 2851bcef60f2SArne Jansen fail_qgroup: 2852bcef60f2SArne Jansen btrfs_free_qgroup_config(fs_info); 28537c2ca468SChris Mason fail_trans_kthread: 28547c2ca468SChris Mason kthread_stop(fs_info->transaction_kthread); 2855171f6537SJosef Bacik del_fs_roots(fs_info); 285654067ae9SJosef Bacik btrfs_cleanup_transaction(fs_info->tree_root); 28573f157a2fSChris Mason fail_cleaner: 2858a74a4b97SChris Mason kthread_stop(fs_info->cleaner_kthread); 28597c2ca468SChris Mason 28607c2ca468SChris Mason /* 28617c2ca468SChris Mason * make sure we're done with the btree inode before we stop our 28627c2ca468SChris Mason * kthreads 28637c2ca468SChris Mason */ 28647c2ca468SChris Mason filemap_write_and_wait(fs_info->btree_inode->i_mapping); 28657c2ca468SChris Mason 28661b1d1f66SJosef Bacik fail_block_groups: 286754067ae9SJosef Bacik btrfs_put_block_group_cache(fs_info); 28681b1d1f66SJosef Bacik btrfs_free_block_groups(fs_info); 2869af31f5e5SChris Mason 2870af31f5e5SChris Mason fail_tree_roots: 2871af31f5e5SChris Mason free_root_pointers(fs_info, 1); 28722b8195bbSMiao Xie invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 2873af31f5e5SChris Mason 287439279cc3SChris Mason fail_sb_buffer: 28757abadb64SLiu Bo btrfs_stop_all_workers(fs_info); 287616cdcec7SMiao Xie fail_alloc: 28774543df7eSChris Mason fail_iput: 2878586e46e2SIlya Dryomov btrfs_mapping_tree_free(&fs_info->mapping_tree); 2879586e46e2SIlya Dryomov 28804543df7eSChris Mason iput(fs_info->btree_inode); 2881963d678bSMiao Xie fail_delalloc_bytes: 2882963d678bSMiao Xie percpu_counter_destroy(&fs_info->delalloc_bytes); 2883e2d84521SMiao Xie fail_dirty_metadata_bytes: 2884e2d84521SMiao Xie percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 2885ad081f14SJens Axboe fail_bdi: 28867e662854SQinghuang Feng bdi_destroy(&fs_info->bdi); 288776dda93cSYan, Zheng fail_srcu: 288876dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 28897e662854SQinghuang Feng fail: 289053b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 2891586e46e2SIlya Dryomov btrfs_close_devices(fs_info->fs_devices); 2892ad2b2c80SAl Viro return err; 2893af31f5e5SChris Mason 2894af31f5e5SChris Mason recovery_tree_root: 2895af31f5e5SChris Mason if (!btrfs_test_opt(tree_root, RECOVERY)) 2896af31f5e5SChris Mason goto fail_tree_roots; 2897af31f5e5SChris Mason 2898af31f5e5SChris Mason free_root_pointers(fs_info, 0); 2899af31f5e5SChris Mason 2900af31f5e5SChris Mason /* don't use the log in recovery mode, it won't be valid */ 2901af31f5e5SChris Mason btrfs_set_super_log_root(disk_super, 0); 2902af31f5e5SChris Mason 2903af31f5e5SChris Mason /* we can't trust the free space cache either */ 2904af31f5e5SChris Mason btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); 2905af31f5e5SChris Mason 2906af31f5e5SChris Mason ret = next_root_backup(fs_info, fs_info->super_copy, 2907af31f5e5SChris Mason &num_backups_tried, &backup_index); 2908af31f5e5SChris Mason if (ret == -1) 2909af31f5e5SChris Mason goto fail_block_groups; 2910af31f5e5SChris Mason goto retry_root_backup; 2911eb60ceacSChris Mason } 2912eb60ceacSChris Mason 2913f2984462SChris Mason static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) 2914f2984462SChris Mason { 2915f2984462SChris Mason if (uptodate) { 2916f2984462SChris Mason set_buffer_uptodate(bh); 2917f2984462SChris Mason } else { 2918442a4f63SStefan Behrens struct btrfs_device *device = (struct btrfs_device *) 2919442a4f63SStefan Behrens bh->b_private; 2920442a4f63SStefan Behrens 2921606686eeSJosef Bacik printk_ratelimited_in_rcu(KERN_WARNING "lost page write due to " 2922606686eeSJosef Bacik "I/O error on %s\n", 2923606686eeSJosef Bacik rcu_str_deref(device->name)); 29241259ab75SChris Mason /* note, we dont' set_buffer_write_io_error because we have 29251259ab75SChris Mason * our own ways of dealing with the IO errors 29261259ab75SChris Mason */ 2927f2984462SChris Mason clear_buffer_uptodate(bh); 2928442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); 2929f2984462SChris Mason } 2930f2984462SChris Mason unlock_buffer(bh); 2931f2984462SChris Mason put_bh(bh); 2932f2984462SChris Mason } 2933f2984462SChris Mason 2934a512bbf8SYan Zheng struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) 2935a512bbf8SYan Zheng { 2936a512bbf8SYan Zheng struct buffer_head *bh; 2937a512bbf8SYan Zheng struct buffer_head *latest = NULL; 2938a512bbf8SYan Zheng struct btrfs_super_block *super; 2939a512bbf8SYan Zheng int i; 2940a512bbf8SYan Zheng u64 transid = 0; 2941a512bbf8SYan Zheng u64 bytenr; 2942a512bbf8SYan Zheng 2943a512bbf8SYan Zheng /* we would like to check all the supers, but that would make 2944a512bbf8SYan Zheng * a btrfs mount succeed after a mkfs from a different FS. 2945a512bbf8SYan Zheng * So, we need to add a special mount option to scan for 2946a512bbf8SYan Zheng * later supers, using BTRFS_SUPER_MIRROR_MAX instead 2947a512bbf8SYan Zheng */ 2948a512bbf8SYan Zheng for (i = 0; i < 1; i++) { 2949a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 2950a512bbf8SYan Zheng if (bytenr + 4096 >= i_size_read(bdev->bd_inode)) 2951a512bbf8SYan Zheng break; 2952a512bbf8SYan Zheng bh = __bread(bdev, bytenr / 4096, 4096); 2953a512bbf8SYan Zheng if (!bh) 2954a512bbf8SYan Zheng continue; 2955a512bbf8SYan Zheng 2956a512bbf8SYan Zheng super = (struct btrfs_super_block *)bh->b_data; 2957a512bbf8SYan Zheng if (btrfs_super_bytenr(super) != bytenr || 2958cdb4c574SZach Brown super->magic != cpu_to_le64(BTRFS_MAGIC)) { 2959a512bbf8SYan Zheng brelse(bh); 2960a512bbf8SYan Zheng continue; 2961a512bbf8SYan Zheng } 2962a512bbf8SYan Zheng 2963a512bbf8SYan Zheng if (!latest || btrfs_super_generation(super) > transid) { 2964a512bbf8SYan Zheng brelse(latest); 2965a512bbf8SYan Zheng latest = bh; 2966a512bbf8SYan Zheng transid = btrfs_super_generation(super); 2967a512bbf8SYan Zheng } else { 2968a512bbf8SYan Zheng brelse(bh); 2969a512bbf8SYan Zheng } 2970a512bbf8SYan Zheng } 2971a512bbf8SYan Zheng return latest; 2972a512bbf8SYan Zheng } 2973a512bbf8SYan Zheng 29744eedeb75SHisashi Hifumi /* 29754eedeb75SHisashi Hifumi * this should be called twice, once with wait == 0 and 29764eedeb75SHisashi Hifumi * once with wait == 1. When wait == 0 is done, all the buffer heads 29774eedeb75SHisashi Hifumi * we write are pinned. 29784eedeb75SHisashi Hifumi * 29794eedeb75SHisashi Hifumi * They are released when wait == 1 is done. 29804eedeb75SHisashi Hifumi * max_mirrors must be the same for both runs, and it indicates how 29814eedeb75SHisashi Hifumi * many supers on this one device should be written. 29824eedeb75SHisashi Hifumi * 29834eedeb75SHisashi Hifumi * max_mirrors == 0 means to write them all. 29844eedeb75SHisashi Hifumi */ 2985a512bbf8SYan Zheng static int write_dev_supers(struct btrfs_device *device, 2986a512bbf8SYan Zheng struct btrfs_super_block *sb, 2987a512bbf8SYan Zheng int do_barriers, int wait, int max_mirrors) 2988a512bbf8SYan Zheng { 2989a512bbf8SYan Zheng struct buffer_head *bh; 2990a512bbf8SYan Zheng int i; 2991a512bbf8SYan Zheng int ret; 2992a512bbf8SYan Zheng int errors = 0; 2993a512bbf8SYan Zheng u32 crc; 2994a512bbf8SYan Zheng u64 bytenr; 2995a512bbf8SYan Zheng 2996a512bbf8SYan Zheng if (max_mirrors == 0) 2997a512bbf8SYan Zheng max_mirrors = BTRFS_SUPER_MIRROR_MAX; 2998a512bbf8SYan Zheng 2999a512bbf8SYan Zheng for (i = 0; i < max_mirrors; i++) { 3000a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 3001a512bbf8SYan Zheng if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes) 3002a512bbf8SYan Zheng break; 3003a512bbf8SYan Zheng 3004a512bbf8SYan Zheng if (wait) { 3005a512bbf8SYan Zheng bh = __find_get_block(device->bdev, bytenr / 4096, 3006a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 3007634554dcSJosef Bacik if (!bh) { 3008634554dcSJosef Bacik errors++; 3009634554dcSJosef Bacik continue; 3010634554dcSJosef Bacik } 3011a512bbf8SYan Zheng wait_on_buffer(bh); 30124eedeb75SHisashi Hifumi if (!buffer_uptodate(bh)) 30134eedeb75SHisashi Hifumi errors++; 30144eedeb75SHisashi Hifumi 30154eedeb75SHisashi Hifumi /* drop our reference */ 30164eedeb75SHisashi Hifumi brelse(bh); 30174eedeb75SHisashi Hifumi 30184eedeb75SHisashi Hifumi /* drop the reference from the wait == 0 run */ 3019a512bbf8SYan Zheng brelse(bh); 3020a512bbf8SYan Zheng continue; 3021a512bbf8SYan Zheng } else { 3022a512bbf8SYan Zheng btrfs_set_super_bytenr(sb, bytenr); 3023a512bbf8SYan Zheng 3024a512bbf8SYan Zheng crc = ~(u32)0; 3025b0496686SLiu Bo crc = btrfs_csum_data((char *)sb + 3026a512bbf8SYan Zheng BTRFS_CSUM_SIZE, crc, 3027a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE - 3028a512bbf8SYan Zheng BTRFS_CSUM_SIZE); 3029a512bbf8SYan Zheng btrfs_csum_final(crc, sb->csum); 3030a512bbf8SYan Zheng 30314eedeb75SHisashi Hifumi /* 30324eedeb75SHisashi Hifumi * one reference for us, and we leave it for the 30334eedeb75SHisashi Hifumi * caller 30344eedeb75SHisashi Hifumi */ 3035a512bbf8SYan Zheng bh = __getblk(device->bdev, bytenr / 4096, 3036a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 3037634554dcSJosef Bacik if (!bh) { 3038634554dcSJosef Bacik printk(KERN_ERR "btrfs: couldn't get super " 3039634554dcSJosef Bacik "buffer head for bytenr %Lu\n", bytenr); 3040634554dcSJosef Bacik errors++; 3041634554dcSJosef Bacik continue; 3042634554dcSJosef Bacik } 3043634554dcSJosef Bacik 3044a512bbf8SYan Zheng memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); 3045a512bbf8SYan Zheng 30464eedeb75SHisashi Hifumi /* one reference for submit_bh */ 3047a512bbf8SYan Zheng get_bh(bh); 30484eedeb75SHisashi Hifumi 30494eedeb75SHisashi Hifumi set_buffer_uptodate(bh); 3050a512bbf8SYan Zheng lock_buffer(bh); 3051a512bbf8SYan Zheng bh->b_end_io = btrfs_end_buffer_write_sync; 3052442a4f63SStefan Behrens bh->b_private = device; 3053a512bbf8SYan Zheng } 3054a512bbf8SYan Zheng 3055387125fcSChris Mason /* 3056387125fcSChris Mason * we fua the first super. The others we allow 3057387125fcSChris Mason * to go down lazy. 3058387125fcSChris Mason */ 305921adbd5cSStefan Behrens ret = btrfsic_submit_bh(WRITE_FUA, bh); 30604eedeb75SHisashi Hifumi if (ret) 3061a512bbf8SYan Zheng errors++; 3062a512bbf8SYan Zheng } 3063a512bbf8SYan Zheng return errors < i ? 0 : -1; 3064a512bbf8SYan Zheng } 3065a512bbf8SYan Zheng 3066387125fcSChris Mason /* 3067387125fcSChris Mason * endio for the write_dev_flush, this will wake anyone waiting 3068387125fcSChris Mason * for the barrier when it is done 3069387125fcSChris Mason */ 3070387125fcSChris Mason static void btrfs_end_empty_barrier(struct bio *bio, int err) 3071387125fcSChris Mason { 3072387125fcSChris Mason if (err) { 3073387125fcSChris Mason if (err == -EOPNOTSUPP) 3074387125fcSChris Mason set_bit(BIO_EOPNOTSUPP, &bio->bi_flags); 3075387125fcSChris Mason clear_bit(BIO_UPTODATE, &bio->bi_flags); 3076387125fcSChris Mason } 3077387125fcSChris Mason if (bio->bi_private) 3078387125fcSChris Mason complete(bio->bi_private); 3079387125fcSChris Mason bio_put(bio); 3080387125fcSChris Mason } 3081387125fcSChris Mason 3082387125fcSChris Mason /* 3083387125fcSChris Mason * trigger flushes for one the devices. If you pass wait == 0, the flushes are 3084387125fcSChris Mason * sent down. With wait == 1, it waits for the previous flush. 3085387125fcSChris Mason * 3086387125fcSChris Mason * any device where the flush fails with eopnotsupp are flagged as not-barrier 3087387125fcSChris Mason * capable 3088387125fcSChris Mason */ 3089387125fcSChris Mason static int write_dev_flush(struct btrfs_device *device, int wait) 3090387125fcSChris Mason { 3091387125fcSChris Mason struct bio *bio; 3092387125fcSChris Mason int ret = 0; 3093387125fcSChris Mason 3094387125fcSChris Mason if (device->nobarriers) 3095387125fcSChris Mason return 0; 3096387125fcSChris Mason 3097387125fcSChris Mason if (wait) { 3098387125fcSChris Mason bio = device->flush_bio; 3099387125fcSChris Mason if (!bio) 3100387125fcSChris Mason return 0; 3101387125fcSChris Mason 3102387125fcSChris Mason wait_for_completion(&device->flush_wait); 3103387125fcSChris Mason 3104387125fcSChris Mason if (bio_flagged(bio, BIO_EOPNOTSUPP)) { 3105606686eeSJosef Bacik printk_in_rcu("btrfs: disabling barriers on dev %s\n", 3106606686eeSJosef Bacik rcu_str_deref(device->name)); 3107387125fcSChris Mason device->nobarriers = 1; 31085af3e8ccSStefan Behrens } else if (!bio_flagged(bio, BIO_UPTODATE)) { 3109387125fcSChris Mason ret = -EIO; 3110442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, 3111442a4f63SStefan Behrens BTRFS_DEV_STAT_FLUSH_ERRS); 3112387125fcSChris Mason } 3113387125fcSChris Mason 3114387125fcSChris Mason /* drop the reference from the wait == 0 run */ 3115387125fcSChris Mason bio_put(bio); 3116387125fcSChris Mason device->flush_bio = NULL; 3117387125fcSChris Mason 3118387125fcSChris Mason return ret; 3119387125fcSChris Mason } 3120387125fcSChris Mason 3121387125fcSChris Mason /* 3122387125fcSChris Mason * one reference for us, and we leave it for the 3123387125fcSChris Mason * caller 3124387125fcSChris Mason */ 31259c017abcSJesper Juhl device->flush_bio = NULL; 3126387125fcSChris Mason bio = bio_alloc(GFP_NOFS, 0); 3127387125fcSChris Mason if (!bio) 3128387125fcSChris Mason return -ENOMEM; 3129387125fcSChris Mason 3130387125fcSChris Mason bio->bi_end_io = btrfs_end_empty_barrier; 3131387125fcSChris Mason bio->bi_bdev = device->bdev; 3132387125fcSChris Mason init_completion(&device->flush_wait); 3133387125fcSChris Mason bio->bi_private = &device->flush_wait; 3134387125fcSChris Mason device->flush_bio = bio; 3135387125fcSChris Mason 3136387125fcSChris Mason bio_get(bio); 313721adbd5cSStefan Behrens btrfsic_submit_bio(WRITE_FLUSH, bio); 3138387125fcSChris Mason 3139387125fcSChris Mason return 0; 3140387125fcSChris Mason } 3141387125fcSChris Mason 3142387125fcSChris Mason /* 3143387125fcSChris Mason * send an empty flush down to each device in parallel, 3144387125fcSChris Mason * then wait for them 3145387125fcSChris Mason */ 3146387125fcSChris Mason static int barrier_all_devices(struct btrfs_fs_info *info) 3147387125fcSChris Mason { 3148387125fcSChris Mason struct list_head *head; 3149387125fcSChris Mason struct btrfs_device *dev; 31505af3e8ccSStefan Behrens int errors_send = 0; 31515af3e8ccSStefan Behrens int errors_wait = 0; 3152387125fcSChris Mason int ret; 3153387125fcSChris Mason 3154387125fcSChris Mason /* send down all the barriers */ 3155387125fcSChris Mason head = &info->fs_devices->devices; 3156387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3157387125fcSChris Mason if (!dev->bdev) { 31585af3e8ccSStefan Behrens errors_send++; 3159387125fcSChris Mason continue; 3160387125fcSChris Mason } 3161387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3162387125fcSChris Mason continue; 3163387125fcSChris Mason 3164387125fcSChris Mason ret = write_dev_flush(dev, 0); 3165387125fcSChris Mason if (ret) 31665af3e8ccSStefan Behrens errors_send++; 3167387125fcSChris Mason } 3168387125fcSChris Mason 3169387125fcSChris Mason /* wait for all the barriers */ 3170387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3171387125fcSChris Mason if (!dev->bdev) { 31725af3e8ccSStefan Behrens errors_wait++; 3173387125fcSChris Mason continue; 3174387125fcSChris Mason } 3175387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3176387125fcSChris Mason continue; 3177387125fcSChris Mason 3178387125fcSChris Mason ret = write_dev_flush(dev, 1); 3179387125fcSChris Mason if (ret) 31805af3e8ccSStefan Behrens errors_wait++; 3181387125fcSChris Mason } 31825af3e8ccSStefan Behrens if (errors_send > info->num_tolerated_disk_barrier_failures || 31835af3e8ccSStefan Behrens errors_wait > info->num_tolerated_disk_barrier_failures) 3184387125fcSChris Mason return -EIO; 3185387125fcSChris Mason return 0; 3186387125fcSChris Mason } 3187387125fcSChris Mason 31885af3e8ccSStefan Behrens int btrfs_calc_num_tolerated_disk_barrier_failures( 31895af3e8ccSStefan Behrens struct btrfs_fs_info *fs_info) 31905af3e8ccSStefan Behrens { 31915af3e8ccSStefan Behrens struct btrfs_ioctl_space_info space; 31925af3e8ccSStefan Behrens struct btrfs_space_info *sinfo; 31935af3e8ccSStefan Behrens u64 types[] = {BTRFS_BLOCK_GROUP_DATA, 31945af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_SYSTEM, 31955af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_METADATA, 31965af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; 31975af3e8ccSStefan Behrens int num_types = 4; 31985af3e8ccSStefan Behrens int i; 31995af3e8ccSStefan Behrens int c; 32005af3e8ccSStefan Behrens int num_tolerated_disk_barrier_failures = 32015af3e8ccSStefan Behrens (int)fs_info->fs_devices->num_devices; 32025af3e8ccSStefan Behrens 32035af3e8ccSStefan Behrens for (i = 0; i < num_types; i++) { 32045af3e8ccSStefan Behrens struct btrfs_space_info *tmp; 32055af3e8ccSStefan Behrens 32065af3e8ccSStefan Behrens sinfo = NULL; 32075af3e8ccSStefan Behrens rcu_read_lock(); 32085af3e8ccSStefan Behrens list_for_each_entry_rcu(tmp, &fs_info->space_info, list) { 32095af3e8ccSStefan Behrens if (tmp->flags == types[i]) { 32105af3e8ccSStefan Behrens sinfo = tmp; 32115af3e8ccSStefan Behrens break; 32125af3e8ccSStefan Behrens } 32135af3e8ccSStefan Behrens } 32145af3e8ccSStefan Behrens rcu_read_unlock(); 32155af3e8ccSStefan Behrens 32165af3e8ccSStefan Behrens if (!sinfo) 32175af3e8ccSStefan Behrens continue; 32185af3e8ccSStefan Behrens 32195af3e8ccSStefan Behrens down_read(&sinfo->groups_sem); 32205af3e8ccSStefan Behrens for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { 32215af3e8ccSStefan Behrens if (!list_empty(&sinfo->block_groups[c])) { 32225af3e8ccSStefan Behrens u64 flags; 32235af3e8ccSStefan Behrens 32245af3e8ccSStefan Behrens btrfs_get_block_group_info( 32255af3e8ccSStefan Behrens &sinfo->block_groups[c], &space); 32265af3e8ccSStefan Behrens if (space.total_bytes == 0 || 32275af3e8ccSStefan Behrens space.used_bytes == 0) 32285af3e8ccSStefan Behrens continue; 32295af3e8ccSStefan Behrens flags = space.flags; 32305af3e8ccSStefan Behrens /* 32315af3e8ccSStefan Behrens * return 32325af3e8ccSStefan Behrens * 0: if dup, single or RAID0 is configured for 32335af3e8ccSStefan Behrens * any of metadata, system or data, else 32345af3e8ccSStefan Behrens * 1: if RAID5 is configured, or if RAID1 or 32355af3e8ccSStefan Behrens * RAID10 is configured and only two mirrors 32365af3e8ccSStefan Behrens * are used, else 32375af3e8ccSStefan Behrens * 2: if RAID6 is configured, else 32385af3e8ccSStefan Behrens * num_mirrors - 1: if RAID1 or RAID10 is 32395af3e8ccSStefan Behrens * configured and more than 32405af3e8ccSStefan Behrens * 2 mirrors are used. 32415af3e8ccSStefan Behrens */ 32425af3e8ccSStefan Behrens if (num_tolerated_disk_barrier_failures > 0 && 32435af3e8ccSStefan Behrens ((flags & (BTRFS_BLOCK_GROUP_DUP | 32445af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_RAID0)) || 32455af3e8ccSStefan Behrens ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) 32465af3e8ccSStefan Behrens == 0))) 32475af3e8ccSStefan Behrens num_tolerated_disk_barrier_failures = 0; 324853b381b3SDavid Woodhouse else if (num_tolerated_disk_barrier_failures > 1) { 324953b381b3SDavid Woodhouse if (flags & (BTRFS_BLOCK_GROUP_RAID1 | 325053b381b3SDavid Woodhouse BTRFS_BLOCK_GROUP_RAID5 | 325153b381b3SDavid Woodhouse BTRFS_BLOCK_GROUP_RAID10)) { 32525af3e8ccSStefan Behrens num_tolerated_disk_barrier_failures = 1; 325353b381b3SDavid Woodhouse } else if (flags & 325453b381b3SDavid Woodhouse BTRFS_BLOCK_GROUP_RAID5) { 325553b381b3SDavid Woodhouse num_tolerated_disk_barrier_failures = 2; 325653b381b3SDavid Woodhouse } 325753b381b3SDavid Woodhouse } 32585af3e8ccSStefan Behrens } 32595af3e8ccSStefan Behrens } 32605af3e8ccSStefan Behrens up_read(&sinfo->groups_sem); 32615af3e8ccSStefan Behrens } 32625af3e8ccSStefan Behrens 32635af3e8ccSStefan Behrens return num_tolerated_disk_barrier_failures; 32645af3e8ccSStefan Behrens } 32655af3e8ccSStefan Behrens 326648a3b636SEric Sandeen static int write_all_supers(struct btrfs_root *root, int max_mirrors) 3267f2984462SChris Mason { 3268e5e9a520SChris Mason struct list_head *head; 3269f2984462SChris Mason struct btrfs_device *dev; 3270a061fc8dSChris Mason struct btrfs_super_block *sb; 3271f2984462SChris Mason struct btrfs_dev_item *dev_item; 3272f2984462SChris Mason int ret; 3273f2984462SChris Mason int do_barriers; 3274a236aed1SChris Mason int max_errors; 3275a236aed1SChris Mason int total_errors = 0; 3276a061fc8dSChris Mason u64 flags; 3277f2984462SChris Mason 32786c41761fSDavid Sterba max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; 3279f2984462SChris Mason do_barriers = !btrfs_test_opt(root, NOBARRIER); 3280af31f5e5SChris Mason backup_super_roots(root->fs_info); 3281f2984462SChris Mason 32826c41761fSDavid Sterba sb = root->fs_info->super_for_commit; 3283a061fc8dSChris Mason dev_item = &sb->dev_item; 3284e5e9a520SChris Mason 3285174ba509SChris Mason mutex_lock(&root->fs_info->fs_devices->device_list_mutex); 3286e5e9a520SChris Mason head = &root->fs_info->fs_devices->devices; 3287387125fcSChris Mason 32885af3e8ccSStefan Behrens if (do_barriers) { 32895af3e8ccSStefan Behrens ret = barrier_all_devices(root->fs_info); 32905af3e8ccSStefan Behrens if (ret) { 32915af3e8ccSStefan Behrens mutex_unlock( 32925af3e8ccSStefan Behrens &root->fs_info->fs_devices->device_list_mutex); 32935af3e8ccSStefan Behrens btrfs_error(root->fs_info, ret, 32945af3e8ccSStefan Behrens "errors while submitting device barriers."); 32955af3e8ccSStefan Behrens return ret; 32965af3e8ccSStefan Behrens } 32975af3e8ccSStefan Behrens } 3298387125fcSChris Mason 32991f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3300dfe25020SChris Mason if (!dev->bdev) { 3301dfe25020SChris Mason total_errors++; 3302dfe25020SChris Mason continue; 3303dfe25020SChris Mason } 33042b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3305dfe25020SChris Mason continue; 3306dfe25020SChris Mason 33072b82032cSYan Zheng btrfs_set_stack_device_generation(dev_item, 0); 3308a061fc8dSChris Mason btrfs_set_stack_device_type(dev_item, dev->type); 3309a061fc8dSChris Mason btrfs_set_stack_device_id(dev_item, dev->devid); 3310a061fc8dSChris Mason btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes); 3311a061fc8dSChris Mason btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used); 3312a061fc8dSChris Mason btrfs_set_stack_device_io_align(dev_item, dev->io_align); 3313a061fc8dSChris Mason btrfs_set_stack_device_io_width(dev_item, dev->io_width); 3314a061fc8dSChris Mason btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); 3315a061fc8dSChris Mason memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); 33162b82032cSYan Zheng memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); 3317a512bbf8SYan Zheng 3318a061fc8dSChris Mason flags = btrfs_super_flags(sb); 3319a061fc8dSChris Mason btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); 3320f2984462SChris Mason 3321a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); 3322a236aed1SChris Mason if (ret) 3323a236aed1SChris Mason total_errors++; 3324f2984462SChris Mason } 3325a236aed1SChris Mason if (total_errors > max_errors) { 3326d397712bSChris Mason printk(KERN_ERR "btrfs: %d errors while writing supers\n", 3327d397712bSChris Mason total_errors); 332879787eaaSJeff Mahoney 332979787eaaSJeff Mahoney /* This shouldn't happen. FUA is masked off if unsupported */ 3330a236aed1SChris Mason BUG(); 3331a236aed1SChris Mason } 3332f2984462SChris Mason 3333a512bbf8SYan Zheng total_errors = 0; 33341f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3335dfe25020SChris Mason if (!dev->bdev) 3336dfe25020SChris Mason continue; 33372b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3338dfe25020SChris Mason continue; 3339dfe25020SChris Mason 3340a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); 3341a512bbf8SYan Zheng if (ret) 33421259ab75SChris Mason total_errors++; 3343f2984462SChris Mason } 3344174ba509SChris Mason mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 3345a236aed1SChris Mason if (total_errors > max_errors) { 334679787eaaSJeff Mahoney btrfs_error(root->fs_info, -EIO, 334779787eaaSJeff Mahoney "%d errors while writing supers", total_errors); 334879787eaaSJeff Mahoney return -EIO; 3349a236aed1SChris Mason } 3350f2984462SChris Mason return 0; 3351f2984462SChris Mason } 3352f2984462SChris Mason 3353a512bbf8SYan Zheng int write_ctree_super(struct btrfs_trans_handle *trans, 3354a512bbf8SYan Zheng struct btrfs_root *root, int max_mirrors) 3355cfaa7295SChris Mason { 3356e66f709bSChris Mason int ret; 33572c90e5d6SChris Mason 3358a512bbf8SYan Zheng ret = write_all_supers(root, max_mirrors); 33595f39d397SChris Mason return ret; 3360cfaa7295SChris Mason } 3361cfaa7295SChris Mason 3362143bede5SJeff Mahoney void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) 33632619ba1fSChris Mason { 33644df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 33652619ba1fSChris Mason radix_tree_delete(&fs_info->fs_roots_radix, 33662619ba1fSChris Mason (unsigned long)root->root_key.objectid); 33674df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 336876dda93cSYan, Zheng 336976dda93cSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) 337076dda93cSYan, Zheng synchronize_srcu(&fs_info->subvol_srcu); 337176dda93cSYan, Zheng 3372d7634482SLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { 33733321719eSLiu Bo btrfs_free_log(NULL, root); 33743321719eSLiu Bo btrfs_free_log_root_tree(NULL, fs_info); 33753321719eSLiu Bo } 33763321719eSLiu Bo 3377581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_pinned); 3378581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_ctl); 33794df27c4dSYan, Zheng free_fs_root(root); 33804df27c4dSYan, Zheng } 33814df27c4dSYan, Zheng 33824df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root) 33834df27c4dSYan, Zheng { 338482d5902dSLi Zefan iput(root->cache_inode); 33854df27c4dSYan, Zheng WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); 33860ee5dc67SAl Viro if (root->anon_dev) 33870ee5dc67SAl Viro free_anon_bdev(root->anon_dev); 33885f39d397SChris Mason free_extent_buffer(root->node); 33895f39d397SChris Mason free_extent_buffer(root->commit_root); 3390581bb050SLi Zefan kfree(root->free_ino_ctl); 3391581bb050SLi Zefan kfree(root->free_ino_pinned); 339258176a96SJosef Bacik kfree(root->name); 33932619ba1fSChris Mason kfree(root); 33942619ba1fSChris Mason } 33952619ba1fSChris Mason 3396c146afadSYan Zheng int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) 3397c146afadSYan Zheng { 3398c146afadSYan Zheng u64 root_objectid = 0; 3399c146afadSYan Zheng struct btrfs_root *gang[8]; 3400c146afadSYan Zheng int i; 3401c146afadSYan Zheng int ret; 3402c146afadSYan Zheng 3403c146afadSYan Zheng while (1) { 3404c146afadSYan Zheng ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 3405c146afadSYan Zheng (void **)gang, root_objectid, 3406c146afadSYan Zheng ARRAY_SIZE(gang)); 3407c146afadSYan Zheng if (!ret) 3408c146afadSYan Zheng break; 34095d4f98a2SYan Zheng 34105d4f98a2SYan Zheng root_objectid = gang[ret - 1]->root_key.objectid + 1; 3411c146afadSYan Zheng for (i = 0; i < ret; i++) { 341266b4ffd1SJosef Bacik int err; 341366b4ffd1SJosef Bacik 3414c146afadSYan Zheng root_objectid = gang[i]->root_key.objectid; 341566b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(gang[i]); 341666b4ffd1SJosef Bacik if (err) 341766b4ffd1SJosef Bacik return err; 3418c146afadSYan Zheng } 3419c146afadSYan Zheng root_objectid++; 3420c146afadSYan Zheng } 3421c146afadSYan Zheng return 0; 3422c146afadSYan Zheng } 3423c146afadSYan Zheng 3424c146afadSYan Zheng int btrfs_commit_super(struct btrfs_root *root) 3425c146afadSYan Zheng { 3426c146afadSYan Zheng struct btrfs_trans_handle *trans; 3427c146afadSYan Zheng int ret; 3428c146afadSYan Zheng 3429c146afadSYan Zheng mutex_lock(&root->fs_info->cleaner_mutex); 343024bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 3431c146afadSYan Zheng mutex_unlock(&root->fs_info->cleaner_mutex); 34329d1a2a3aSDavid Sterba wake_up_process(root->fs_info->cleaner_kthread); 3433c71bf099SYan, Zheng 3434c71bf099SYan, Zheng /* wait until ongoing cleanup work done */ 3435c71bf099SYan, Zheng down_write(&root->fs_info->cleanup_work_sem); 3436c71bf099SYan, Zheng up_write(&root->fs_info->cleanup_work_sem); 3437c71bf099SYan, Zheng 34387a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 34393612b495STsutomu Itoh if (IS_ERR(trans)) 34403612b495STsutomu Itoh return PTR_ERR(trans); 3441c146afadSYan Zheng ret = btrfs_commit_transaction(trans, root); 344279787eaaSJeff Mahoney if (ret) 344379787eaaSJeff Mahoney return ret; 3444c146afadSYan Zheng /* run commit again to drop the original snapshot */ 34457a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 34463612b495STsutomu Itoh if (IS_ERR(trans)) 34473612b495STsutomu Itoh return PTR_ERR(trans); 344879787eaaSJeff Mahoney ret = btrfs_commit_transaction(trans, root); 344979787eaaSJeff Mahoney if (ret) 345079787eaaSJeff Mahoney return ret; 3451c146afadSYan Zheng ret = btrfs_write_and_wait_transaction(NULL, root); 345279787eaaSJeff Mahoney if (ret) { 345379787eaaSJeff Mahoney btrfs_error(root->fs_info, ret, 345479787eaaSJeff Mahoney "Failed to sync btree inode to disk."); 345579787eaaSJeff Mahoney return ret; 345679787eaaSJeff Mahoney } 3457c146afadSYan Zheng 3458a512bbf8SYan Zheng ret = write_ctree_super(NULL, root, 0); 3459c146afadSYan Zheng return ret; 3460c146afadSYan Zheng } 3461c146afadSYan Zheng 3462e20d96d6SChris Mason int close_ctree(struct btrfs_root *root) 3463eb60ceacSChris Mason { 34640f7d52f4SChris Mason struct btrfs_fs_info *fs_info = root->fs_info; 3465c146afadSYan Zheng int ret; 3466e089f05cSChris Mason 3467facda1e7SChris Mason fs_info->closing = 1; 3468a2135011SChris Mason smp_mb(); 3469a2135011SChris Mason 3470837d5b6eSIlya Dryomov /* pause restriper - we want to resume on mount */ 3471aa1b8cd4SStefan Behrens btrfs_pause_balance(fs_info); 3472837d5b6eSIlya Dryomov 34738dabb742SStefan Behrens btrfs_dev_replace_suspend_for_unmount(fs_info); 34748dabb742SStefan Behrens 3475aa1b8cd4SStefan Behrens btrfs_scrub_cancel(fs_info); 34764cb5300bSChris Mason 34774cb5300bSChris Mason /* wait for any defraggers to finish */ 34784cb5300bSChris Mason wait_event(fs_info->transaction_wait, 34794cb5300bSChris Mason (atomic_read(&fs_info->defrag_running) == 0)); 34804cb5300bSChris Mason 34814cb5300bSChris Mason /* clear out the rbtree of defraggable inodes */ 348226176e7cSMiao Xie btrfs_cleanup_defrag_inodes(fs_info); 34834cb5300bSChris Mason 3484c146afadSYan Zheng if (!(fs_info->sb->s_flags & MS_RDONLY)) { 3485c146afadSYan Zheng ret = btrfs_commit_super(root); 3486d397712bSChris Mason if (ret) 3487d397712bSChris Mason printk(KERN_ERR "btrfs: commit super ret %d\n", ret); 3488c146afadSYan Zheng } 3489ed2ff2cbSChris Mason 349087533c47SMiao Xie if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) 349168ce9682SStefan Behrens btrfs_error_commit_super(root); 3492acce952bSliubo 3493300e4f8aSJosef Bacik btrfs_put_block_group_cache(fs_info); 3494300e4f8aSJosef Bacik 3495e3029d9fSAl Viro kthread_stop(fs_info->transaction_kthread); 3496e3029d9fSAl Viro kthread_stop(fs_info->cleaner_kthread); 34978929ecfaSYan, Zheng 3498f25784b3SYan Zheng fs_info->closing = 2; 3499f25784b3SYan Zheng smp_mb(); 3500f25784b3SYan Zheng 3501bcef60f2SArne Jansen btrfs_free_qgroup_config(root->fs_info); 3502bcef60f2SArne Jansen 3503963d678bSMiao Xie if (percpu_counter_sum(&fs_info->delalloc_bytes)) { 3504963d678bSMiao Xie printk(KERN_INFO "btrfs: at unmount delalloc count %lld\n", 3505963d678bSMiao Xie percpu_counter_sum(&fs_info->delalloc_bytes)); 3506b0c68f8bSChris Mason } 350731153d81SYan Zheng 3508be283b2eSLiu Bo free_root_pointers(fs_info, 1); 3509d20f7043SChris Mason 3510e3029d9fSAl Viro btrfs_free_block_groups(fs_info); 3511c146afadSYan Zheng 35120f7d52f4SChris Mason del_fs_roots(fs_info); 3513d10c5f31SChris Mason 3514c146afadSYan Zheng iput(fs_info->btree_inode); 35159ad6b7bcSChris Mason 35167abadb64SLiu Bo btrfs_stop_all_workers(fs_info); 3517d6bfde87SChris Mason 351821adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 351921adbd5cSStefan Behrens if (btrfs_test_opt(root, CHECK_INTEGRITY)) 352021adbd5cSStefan Behrens btrfsic_unmount(root, fs_info->fs_devices); 352121adbd5cSStefan Behrens #endif 352221adbd5cSStefan Behrens 3523dfe25020SChris Mason btrfs_close_devices(fs_info->fs_devices); 35240b86a832SChris Mason btrfs_mapping_tree_free(&fs_info->mapping_tree); 3525b248a415SChris Mason 3526e2d84521SMiao Xie percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 3527963d678bSMiao Xie percpu_counter_destroy(&fs_info->delalloc_bytes); 352804160088SChris Mason bdi_destroy(&fs_info->bdi); 352976dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 35300b86a832SChris Mason 353153b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 353253b381b3SDavid Woodhouse 3533eb60ceacSChris Mason return 0; 3534eb60ceacSChris Mason } 3535eb60ceacSChris Mason 3536b9fab919SChris Mason int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, 3537b9fab919SChris Mason int atomic) 3538ccd467d6SChris Mason { 35391259ab75SChris Mason int ret; 3540727011e0SChris Mason struct inode *btree_inode = buf->pages[0]->mapping->host; 35411259ab75SChris Mason 35420b32f4bbSJosef Bacik ret = extent_buffer_uptodate(buf); 35431259ab75SChris Mason if (!ret) 35441259ab75SChris Mason return ret; 35451259ab75SChris Mason 35461259ab75SChris Mason ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, 3547b9fab919SChris Mason parent_transid, atomic); 3548b9fab919SChris Mason if (ret == -EAGAIN) 3549b9fab919SChris Mason return ret; 35501259ab75SChris Mason return !ret; 35515f39d397SChris Mason } 35526702ed49SChris Mason 35535f39d397SChris Mason int btrfs_set_buffer_uptodate(struct extent_buffer *buf) 35545f39d397SChris Mason { 35550b32f4bbSJosef Bacik return set_extent_buffer_uptodate(buf); 35565f39d397SChris Mason } 35575f39d397SChris Mason 35585f39d397SChris Mason void btrfs_mark_buffer_dirty(struct extent_buffer *buf) 35595f39d397SChris Mason { 3560727011e0SChris Mason struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; 35615f39d397SChris Mason u64 transid = btrfs_header_generation(buf); 3562b9473439SChris Mason int was_dirty; 3563b4ce94deSChris Mason 3564b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 356531b1a2bdSJulia Lawall if (transid != root->fs_info->generation) 356631b1a2bdSJulia Lawall WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, " 3567d397712bSChris Mason "found %llu running %llu\n", 3568db94535dSChris Mason (unsigned long long)buf->start, 3569d397712bSChris Mason (unsigned long long)transid, 3570d397712bSChris Mason (unsigned long long)root->fs_info->generation); 35710b32f4bbSJosef Bacik was_dirty = set_extent_buffer_dirty(buf); 3572e2d84521SMiao Xie if (!was_dirty) 3573e2d84521SMiao Xie __percpu_counter_add(&root->fs_info->dirty_metadata_bytes, 3574e2d84521SMiao Xie buf->len, 3575e2d84521SMiao Xie root->fs_info->dirty_metadata_batch); 3576eb60ceacSChris Mason } 3577eb60ceacSChris Mason 3578b53d3f5dSLiu Bo static void __btrfs_btree_balance_dirty(struct btrfs_root *root, 3579b53d3f5dSLiu Bo int flush_delayed) 358035b7e476SChris Mason { 3581188de649SChris Mason /* 3582188de649SChris Mason * looks as though older kernels can get into trouble with 3583188de649SChris Mason * this code, they end up stuck in balance_dirty_pages forever 3584188de649SChris Mason */ 3585e2d84521SMiao Xie int ret; 3586d6bfde87SChris Mason 35876933c02eSJens Axboe if (current->flags & PF_MEMALLOC) 3588d6bfde87SChris Mason return; 3589d6bfde87SChris Mason 3590b53d3f5dSLiu Bo if (flush_delayed) 359116cdcec7SMiao Xie btrfs_balance_delayed_items(root); 359216cdcec7SMiao Xie 3593e2d84521SMiao Xie ret = percpu_counter_compare(&root->fs_info->dirty_metadata_bytes, 3594e2d84521SMiao Xie BTRFS_DIRTY_METADATA_THRESH); 3595e2d84521SMiao Xie if (ret > 0) { 3596d0e1d66bSNamjae Jeon balance_dirty_pages_ratelimited( 3597d0e1d66bSNamjae Jeon root->fs_info->btree_inode->i_mapping); 359816cdcec7SMiao Xie } 359916cdcec7SMiao Xie return; 360016cdcec7SMiao Xie } 360116cdcec7SMiao Xie 3602b53d3f5dSLiu Bo void btrfs_btree_balance_dirty(struct btrfs_root *root) 360316cdcec7SMiao Xie { 3604b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 1); 360535b7e476SChris Mason } 3606b53d3f5dSLiu Bo 3607b53d3f5dSLiu Bo void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root) 3608b53d3f5dSLiu Bo { 3609b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 0); 3610d6bfde87SChris Mason } 36116b80053dSChris Mason 3612ca7a79adSChris Mason int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) 36136b80053dSChris Mason { 3614727011e0SChris Mason struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; 36150b32f4bbSJosef Bacik return btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 36166b80053dSChris Mason } 36170da5468fSChris Mason 3618fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 3619acce952bSliubo int read_only) 3620acce952bSliubo { 36211104a885SDavid Sterba /* 36221104a885SDavid Sterba * Placeholder for checks 36231104a885SDavid Sterba */ 3624fcd1f065SDavid Sterba return 0; 3625fcd1f065SDavid Sterba } 3626fcd1f065SDavid Sterba 362748a3b636SEric Sandeen static void btrfs_error_commit_super(struct btrfs_root *root) 3628acce952bSliubo { 3629acce952bSliubo mutex_lock(&root->fs_info->cleaner_mutex); 3630acce952bSliubo btrfs_run_delayed_iputs(root); 3631acce952bSliubo mutex_unlock(&root->fs_info->cleaner_mutex); 3632acce952bSliubo 3633acce952bSliubo down_write(&root->fs_info->cleanup_work_sem); 3634acce952bSliubo up_write(&root->fs_info->cleanup_work_sem); 3635acce952bSliubo 3636acce952bSliubo /* cleanup FS via transaction */ 3637acce952bSliubo btrfs_cleanup_transaction(root); 3638acce952bSliubo } 3639acce952bSliubo 3640569e0f35SJosef Bacik static void btrfs_destroy_ordered_operations(struct btrfs_transaction *t, 3641569e0f35SJosef Bacik struct btrfs_root *root) 3642acce952bSliubo { 3643acce952bSliubo struct btrfs_inode *btrfs_inode; 3644acce952bSliubo struct list_head splice; 3645acce952bSliubo 3646acce952bSliubo INIT_LIST_HEAD(&splice); 3647acce952bSliubo 3648acce952bSliubo mutex_lock(&root->fs_info->ordered_operations_mutex); 3649acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3650acce952bSliubo 3651569e0f35SJosef Bacik list_splice_init(&t->ordered_operations, &splice); 3652acce952bSliubo while (!list_empty(&splice)) { 3653acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3654acce952bSliubo ordered_operations); 3655acce952bSliubo 3656acce952bSliubo list_del_init(&btrfs_inode->ordered_operations); 3657acce952bSliubo 3658acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3659acce952bSliubo } 3660acce952bSliubo 3661acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3662acce952bSliubo mutex_unlock(&root->fs_info->ordered_operations_mutex); 3663acce952bSliubo } 3664acce952bSliubo 3665143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root) 3666acce952bSliubo { 3667acce952bSliubo struct btrfs_ordered_extent *ordered; 3668acce952bSliubo 3669acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3670779880efSJosef Bacik /* 3671779880efSJosef Bacik * This will just short circuit the ordered completion stuff which will 3672779880efSJosef Bacik * make sure the ordered extent gets properly cleaned up. 3673779880efSJosef Bacik */ 3674779880efSJosef Bacik list_for_each_entry(ordered, &root->fs_info->ordered_extents, 3675779880efSJosef Bacik root_extent_list) 3676779880efSJosef Bacik set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); 3677acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3678acce952bSliubo } 3679acce952bSliubo 368079787eaaSJeff Mahoney int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 3681acce952bSliubo struct btrfs_root *root) 3682acce952bSliubo { 3683acce952bSliubo struct rb_node *node; 3684acce952bSliubo struct btrfs_delayed_ref_root *delayed_refs; 3685acce952bSliubo struct btrfs_delayed_ref_node *ref; 3686acce952bSliubo int ret = 0; 3687acce952bSliubo 3688acce952bSliubo delayed_refs = &trans->delayed_refs; 3689acce952bSliubo 3690acce952bSliubo spin_lock(&delayed_refs->lock); 3691acce952bSliubo if (delayed_refs->num_entries == 0) { 3692cfece4dbSDavid Sterba spin_unlock(&delayed_refs->lock); 3693acce952bSliubo printk(KERN_INFO "delayed_refs has NO entry\n"); 3694acce952bSliubo return ret; 3695acce952bSliubo } 3696acce952bSliubo 3697b939d1abSJosef Bacik while ((node = rb_first(&delayed_refs->root)) != NULL) { 3698eb12db69SJosef Bacik struct btrfs_delayed_ref_head *head = NULL; 3699acce952bSliubo 3700eb12db69SJosef Bacik ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node); 3701acce952bSliubo atomic_set(&ref->refs, 1); 3702acce952bSliubo if (btrfs_delayed_ref_is_head(ref)) { 3703acce952bSliubo 3704acce952bSliubo head = btrfs_delayed_node_to_head(ref); 3705b939d1abSJosef Bacik if (!mutex_trylock(&head->mutex)) { 3706b939d1abSJosef Bacik atomic_inc(&ref->refs); 370779787eaaSJeff Mahoney spin_unlock(&delayed_refs->lock); 3708b939d1abSJosef Bacik 3709b939d1abSJosef Bacik /* Need to wait for the delayed ref to run */ 3710acce952bSliubo mutex_lock(&head->mutex); 3711b939d1abSJosef Bacik mutex_unlock(&head->mutex); 3712b939d1abSJosef Bacik btrfs_put_delayed_ref(ref); 3713b939d1abSJosef Bacik 3714e18fca73SJosef Bacik spin_lock(&delayed_refs->lock); 3715b939d1abSJosef Bacik continue; 3716b939d1abSJosef Bacik } 3717b939d1abSJosef Bacik 371854067ae9SJosef Bacik if (head->must_insert_reserved) 371954067ae9SJosef Bacik btrfs_pin_extent(root, ref->bytenr, 372054067ae9SJosef Bacik ref->num_bytes, 1); 372178a6184aSMiao Xie btrfs_free_delayed_extent_op(head->extent_op); 3722acce952bSliubo delayed_refs->num_heads--; 3723acce952bSliubo if (list_empty(&head->cluster)) 3724acce952bSliubo delayed_refs->num_heads_ready--; 3725acce952bSliubo list_del_init(&head->cluster); 3726acce952bSliubo } 3727eb12db69SJosef Bacik 3728b939d1abSJosef Bacik ref->in_tree = 0; 3729b939d1abSJosef Bacik rb_erase(&ref->rb_node, &delayed_refs->root); 3730b939d1abSJosef Bacik delayed_refs->num_entries--; 3731eb12db69SJosef Bacik if (head) 3732eb12db69SJosef Bacik mutex_unlock(&head->mutex); 3733acce952bSliubo spin_unlock(&delayed_refs->lock); 3734acce952bSliubo btrfs_put_delayed_ref(ref); 3735acce952bSliubo 3736acce952bSliubo cond_resched(); 3737acce952bSliubo spin_lock(&delayed_refs->lock); 3738acce952bSliubo } 3739acce952bSliubo 3740acce952bSliubo spin_unlock(&delayed_refs->lock); 3741acce952bSliubo 3742acce952bSliubo return ret; 3743acce952bSliubo } 3744acce952bSliubo 3745aec8030aSMiao Xie static void btrfs_evict_pending_snapshots(struct btrfs_transaction *t) 3746acce952bSliubo { 3747acce952bSliubo struct btrfs_pending_snapshot *snapshot; 3748acce952bSliubo struct list_head splice; 3749acce952bSliubo 3750acce952bSliubo INIT_LIST_HEAD(&splice); 3751acce952bSliubo 3752acce952bSliubo list_splice_init(&t->pending_snapshots, &splice); 3753acce952bSliubo 3754acce952bSliubo while (!list_empty(&splice)) { 3755acce952bSliubo snapshot = list_entry(splice.next, 3756acce952bSliubo struct btrfs_pending_snapshot, 3757acce952bSliubo list); 3758aec8030aSMiao Xie snapshot->error = -ECANCELED; 3759acce952bSliubo list_del_init(&snapshot->list); 3760acce952bSliubo } 3761acce952bSliubo } 3762acce952bSliubo 3763143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) 3764acce952bSliubo { 3765acce952bSliubo struct btrfs_inode *btrfs_inode; 3766acce952bSliubo struct list_head splice; 3767acce952bSliubo 3768acce952bSliubo INIT_LIST_HEAD(&splice); 3769acce952bSliubo 3770acce952bSliubo spin_lock(&root->fs_info->delalloc_lock); 37715be76758SDavid Sterba list_splice_init(&root->fs_info->delalloc_inodes, &splice); 3772acce952bSliubo 3773acce952bSliubo while (!list_empty(&splice)) { 3774acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3775acce952bSliubo delalloc_inodes); 3776acce952bSliubo 3777acce952bSliubo list_del_init(&btrfs_inode->delalloc_inodes); 3778df0af1a5SMiao Xie clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, 3779df0af1a5SMiao Xie &btrfs_inode->runtime_flags); 3780acce952bSliubo 3781acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3782acce952bSliubo } 3783acce952bSliubo 3784acce952bSliubo spin_unlock(&root->fs_info->delalloc_lock); 3785acce952bSliubo } 3786acce952bSliubo 3787acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 3788acce952bSliubo struct extent_io_tree *dirty_pages, 3789acce952bSliubo int mark) 3790acce952bSliubo { 3791acce952bSliubo int ret; 3792acce952bSliubo struct extent_buffer *eb; 3793acce952bSliubo u64 start = 0; 3794acce952bSliubo u64 end; 3795acce952bSliubo 3796acce952bSliubo while (1) { 3797acce952bSliubo ret = find_first_extent_bit(dirty_pages, start, &start, &end, 3798e6138876SJosef Bacik mark, NULL); 3799acce952bSliubo if (ret) 3800acce952bSliubo break; 3801acce952bSliubo 3802acce952bSliubo clear_extent_bits(dirty_pages, start, end, mark, GFP_NOFS); 3803acce952bSliubo while (start <= end) { 3804fd8b2b61SJosef Bacik eb = btrfs_find_tree_block(root, start, 3805fd8b2b61SJosef Bacik root->leafsize); 3806fd8b2b61SJosef Bacik start += eb->len; 3807fd8b2b61SJosef Bacik if (!eb) 3808acce952bSliubo continue; 3809fd8b2b61SJosef Bacik wait_on_extent_buffer_writeback(eb); 3810acce952bSliubo 3811fd8b2b61SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, 3812fd8b2b61SJosef Bacik &eb->bflags)) 3813fd8b2b61SJosef Bacik clear_extent_buffer_dirty(eb); 3814fd8b2b61SJosef Bacik free_extent_buffer_stale(eb); 3815acce952bSliubo } 3816acce952bSliubo } 3817acce952bSliubo 3818acce952bSliubo return ret; 3819acce952bSliubo } 3820acce952bSliubo 3821acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 3822acce952bSliubo struct extent_io_tree *pinned_extents) 3823acce952bSliubo { 3824acce952bSliubo struct extent_io_tree *unpin; 3825acce952bSliubo u64 start; 3826acce952bSliubo u64 end; 3827acce952bSliubo int ret; 3828ed0eaa14SLiu Bo bool loop = true; 3829acce952bSliubo 3830acce952bSliubo unpin = pinned_extents; 3831ed0eaa14SLiu Bo again: 3832acce952bSliubo while (1) { 3833acce952bSliubo ret = find_first_extent_bit(unpin, 0, &start, &end, 3834e6138876SJosef Bacik EXTENT_DIRTY, NULL); 3835acce952bSliubo if (ret) 3836acce952bSliubo break; 3837acce952bSliubo 3838acce952bSliubo /* opt_discard */ 38395378e607SLi Dongyang if (btrfs_test_opt(root, DISCARD)) 38405378e607SLi Dongyang ret = btrfs_error_discard_extent(root, start, 38415378e607SLi Dongyang end + 1 - start, 38425378e607SLi Dongyang NULL); 3843acce952bSliubo 3844acce952bSliubo clear_extent_dirty(unpin, start, end, GFP_NOFS); 3845acce952bSliubo btrfs_error_unpin_extent_range(root, start, end); 3846acce952bSliubo cond_resched(); 3847acce952bSliubo } 3848acce952bSliubo 3849ed0eaa14SLiu Bo if (loop) { 3850ed0eaa14SLiu Bo if (unpin == &root->fs_info->freed_extents[0]) 3851ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[1]; 3852ed0eaa14SLiu Bo else 3853ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[0]; 3854ed0eaa14SLiu Bo loop = false; 3855ed0eaa14SLiu Bo goto again; 3856ed0eaa14SLiu Bo } 3857ed0eaa14SLiu Bo 3858acce952bSliubo return 0; 3859acce952bSliubo } 3860acce952bSliubo 386149b25e05SJeff Mahoney void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, 386249b25e05SJeff Mahoney struct btrfs_root *root) 386349b25e05SJeff Mahoney { 386449b25e05SJeff Mahoney btrfs_destroy_delayed_refs(cur_trans, root); 386549b25e05SJeff Mahoney btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv, 386649b25e05SJeff Mahoney cur_trans->dirty_pages.dirty_bytes); 386749b25e05SJeff Mahoney 386849b25e05SJeff Mahoney /* FIXME: cleanup wait for commit */ 386949b25e05SJeff Mahoney cur_trans->in_commit = 1; 387049b25e05SJeff Mahoney cur_trans->blocked = 1; 387149b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_blocked_wait); 387249b25e05SJeff Mahoney 3873aec8030aSMiao Xie btrfs_evict_pending_snapshots(cur_trans); 3874aec8030aSMiao Xie 387549b25e05SJeff Mahoney cur_trans->blocked = 0; 387649b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_wait); 387749b25e05SJeff Mahoney 387849b25e05SJeff Mahoney cur_trans->commit_done = 1; 387949b25e05SJeff Mahoney wake_up(&cur_trans->commit_wait); 388049b25e05SJeff Mahoney 388167cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 388267cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 388367cde344SMiao Xie 388449b25e05SJeff Mahoney btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, 388549b25e05SJeff Mahoney EXTENT_DIRTY); 38866e841e32SLiu Bo btrfs_destroy_pinned_extent(root, 38876e841e32SLiu Bo root->fs_info->pinned_extents); 388849b25e05SJeff Mahoney 388949b25e05SJeff Mahoney /* 389049b25e05SJeff Mahoney memset(cur_trans, 0, sizeof(*cur_trans)); 389149b25e05SJeff Mahoney kmem_cache_free(btrfs_transaction_cachep, cur_trans); 389249b25e05SJeff Mahoney */ 389349b25e05SJeff Mahoney } 389449b25e05SJeff Mahoney 389548a3b636SEric Sandeen static int btrfs_cleanup_transaction(struct btrfs_root *root) 3896acce952bSliubo { 3897acce952bSliubo struct btrfs_transaction *t; 3898acce952bSliubo LIST_HEAD(list); 3899acce952bSliubo 3900acce952bSliubo mutex_lock(&root->fs_info->transaction_kthread_mutex); 3901acce952bSliubo 3902a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3903acce952bSliubo list_splice_init(&root->fs_info->trans_list, &list); 3904a4abeea4SJosef Bacik root->fs_info->trans_no_join = 1; 3905a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3906a4abeea4SJosef Bacik 3907acce952bSliubo while (!list_empty(&list)) { 3908acce952bSliubo t = list_entry(list.next, struct btrfs_transaction, list); 3909acce952bSliubo 3910569e0f35SJosef Bacik btrfs_destroy_ordered_operations(t, root); 3911acce952bSliubo 3912acce952bSliubo btrfs_destroy_ordered_extents(root); 3913acce952bSliubo 3914acce952bSliubo btrfs_destroy_delayed_refs(t, root); 3915acce952bSliubo 3916acce952bSliubo /* FIXME: cleanup wait for commit */ 3917acce952bSliubo t->in_commit = 1; 3918acce952bSliubo t->blocked = 1; 391966657b31SJosef Bacik smp_mb(); 3920acce952bSliubo if (waitqueue_active(&root->fs_info->transaction_blocked_wait)) 3921acce952bSliubo wake_up(&root->fs_info->transaction_blocked_wait); 3922acce952bSliubo 3923aec8030aSMiao Xie btrfs_evict_pending_snapshots(t); 3924aec8030aSMiao Xie 3925acce952bSliubo t->blocked = 0; 392666657b31SJosef Bacik smp_mb(); 3927acce952bSliubo if (waitqueue_active(&root->fs_info->transaction_wait)) 3928acce952bSliubo wake_up(&root->fs_info->transaction_wait); 3929acce952bSliubo 3930acce952bSliubo t->commit_done = 1; 393166657b31SJosef Bacik smp_mb(); 3932acce952bSliubo if (waitqueue_active(&t->commit_wait)) 3933acce952bSliubo wake_up(&t->commit_wait); 3934acce952bSliubo 393567cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 393667cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 393767cde344SMiao Xie 3938acce952bSliubo btrfs_destroy_delalloc_inodes(root); 3939acce952bSliubo 3940a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3941acce952bSliubo root->fs_info->running_transaction = NULL; 3942a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3943acce952bSliubo 3944acce952bSliubo btrfs_destroy_marked_extents(root, &t->dirty_pages, 3945acce952bSliubo EXTENT_DIRTY); 3946acce952bSliubo 3947acce952bSliubo btrfs_destroy_pinned_extent(root, 3948acce952bSliubo root->fs_info->pinned_extents); 3949acce952bSliubo 395013c5a93eSJosef Bacik atomic_set(&t->use_count, 0); 3951acce952bSliubo list_del_init(&t->list); 3952acce952bSliubo memset(t, 0, sizeof(*t)); 3953acce952bSliubo kmem_cache_free(btrfs_transaction_cachep, t); 3954acce952bSliubo } 3955acce952bSliubo 3956a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3957a4abeea4SJosef Bacik root->fs_info->trans_no_join = 0; 3958a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3959acce952bSliubo mutex_unlock(&root->fs_info->transaction_kthread_mutex); 3960acce952bSliubo 3961acce952bSliubo return 0; 3962acce952bSliubo } 3963acce952bSliubo 3964d1310b2eSChris Mason static struct extent_io_ops btree_extent_io_ops = { 3965ce9adaa5SChris Mason .readpage_end_io_hook = btree_readpage_end_io_hook, 39664bb31e92SArne Jansen .readpage_io_failed_hook = btree_io_failed_hook, 39670b86a832SChris Mason .submit_bio_hook = btree_submit_bio_hook, 3968239b14b3SChris Mason /* note we're sharing with inode.c for the merge bio hook */ 3969239b14b3SChris Mason .merge_bio_hook = btrfs_merge_bio_hook, 39700da5468fSChris Mason }; 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