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> 34803b2f54SStefan Behrens #include <linux/semaphore.h> 357e75bf3fSDavid Sterba #include <asm/unaligned.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" 515ac1d209SJeff Mahoney #include "sysfs.h" 52eb60ceacSChris Mason 53de0022b9SJosef Bacik #ifdef CONFIG_X86 54de0022b9SJosef Bacik #include <asm/cpufeature.h> 55de0022b9SJosef Bacik #endif 56de0022b9SJosef Bacik 57d1310b2eSChris Mason static struct extent_io_ops btree_extent_io_ops; 588b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work); 594df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root); 60fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 61acce952bSliubo int read_only); 62569e0f35SJosef Bacik static void btrfs_destroy_ordered_operations(struct btrfs_transaction *t, 63569e0f35SJosef Bacik struct btrfs_root *root); 64143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root); 65acce952bSliubo static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 66acce952bSliubo struct btrfs_root *root); 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" }, 15560b62978SDavid Sterba { .id = BTRFS_QUOTA_TREE_OBJECTID, .name_stem = "quota" }, 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" }, 15913fd8da9SDavid Sterba { .id = BTRFS_UUID_TREE_OBJECTID, .name_stem = "uuid" }, 16085d4e461SChris Mason { .id = 0, .name_stem = "tree" }, 1614008c04aSChris Mason }; 16285d4e461SChris Mason 16385d4e461SChris Mason void __init btrfs_init_lockdep(void) 16485d4e461SChris Mason { 16585d4e461SChris Mason int i, j; 16685d4e461SChris Mason 16785d4e461SChris Mason /* initialize lockdep class names */ 16885d4e461SChris Mason for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { 16985d4e461SChris Mason struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; 17085d4e461SChris Mason 17185d4e461SChris Mason for (j = 0; j < ARRAY_SIZE(ks->names); j++) 17285d4e461SChris Mason snprintf(ks->names[j], sizeof(ks->names[j]), 17385d4e461SChris Mason "btrfs-%s-%02d", ks->name_stem, j); 17485d4e461SChris Mason } 17585d4e461SChris Mason } 17685d4e461SChris Mason 17785d4e461SChris Mason void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, 17885d4e461SChris Mason int level) 17985d4e461SChris Mason { 18085d4e461SChris Mason struct btrfs_lockdep_keyset *ks; 18185d4e461SChris Mason 18285d4e461SChris Mason BUG_ON(level >= ARRAY_SIZE(ks->keys)); 18385d4e461SChris Mason 18485d4e461SChris Mason /* find the matching keyset, id 0 is the default entry */ 18585d4e461SChris Mason for (ks = btrfs_lockdep_keysets; ks->id; ks++) 18685d4e461SChris Mason if (ks->id == objectid) 18785d4e461SChris Mason break; 18885d4e461SChris Mason 18985d4e461SChris Mason lockdep_set_class_and_name(&eb->lock, 19085d4e461SChris Mason &ks->keys[level], ks->names[level]); 19185d4e461SChris Mason } 19285d4e461SChris Mason 1934008c04aSChris Mason #endif 1944008c04aSChris Mason 195d352ac68SChris Mason /* 196d352ac68SChris Mason * extents on the btree inode are pretty simple, there's one extent 197d352ac68SChris Mason * that covers the entire device 198d352ac68SChris Mason */ 199b2950863SChristoph Hellwig static struct extent_map *btree_get_extent(struct inode *inode, 200306e16ceSDavid Sterba struct page *page, size_t pg_offset, u64 start, u64 len, 2015f39d397SChris Mason int create) 2025f39d397SChris Mason { 2035f39d397SChris Mason struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; 2045f39d397SChris Mason struct extent_map *em; 2055f39d397SChris Mason int ret; 2065f39d397SChris Mason 207890871beSChris Mason read_lock(&em_tree->lock); 208d1310b2eSChris Mason em = lookup_extent_mapping(em_tree, start, len); 209a061fc8dSChris Mason if (em) { 210a061fc8dSChris Mason em->bdev = 211a061fc8dSChris Mason BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 212890871beSChris Mason read_unlock(&em_tree->lock); 2135f39d397SChris Mason goto out; 214a061fc8dSChris Mason } 215890871beSChris Mason read_unlock(&em_tree->lock); 2167b13b7b1SChris Mason 217172ddd60SDavid Sterba em = alloc_extent_map(); 2185f39d397SChris Mason if (!em) { 2195f39d397SChris Mason em = ERR_PTR(-ENOMEM); 2205f39d397SChris Mason goto out; 2215f39d397SChris Mason } 2225f39d397SChris Mason em->start = 0; 2230afbaf8cSChris Mason em->len = (u64)-1; 224c8b97818SChris Mason em->block_len = (u64)-1; 2255f39d397SChris Mason em->block_start = 0; 226a061fc8dSChris Mason em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 227d1310b2eSChris Mason 228890871beSChris Mason write_lock(&em_tree->lock); 22909a2a8f9SJosef Bacik ret = add_extent_mapping(em_tree, em, 0); 2305f39d397SChris Mason if (ret == -EEXIST) { 2315f39d397SChris Mason free_extent_map(em); 2327b13b7b1SChris Mason em = lookup_extent_mapping(em_tree, start, len); 233b4f359abSTsutomu Itoh if (!em) 2340433f20dSTsutomu Itoh em = ERR_PTR(-EIO); 2355f39d397SChris Mason } else if (ret) { 2367b13b7b1SChris Mason free_extent_map(em); 2370433f20dSTsutomu Itoh em = ERR_PTR(ret); 2385f39d397SChris Mason } 239890871beSChris Mason write_unlock(&em_tree->lock); 2407b13b7b1SChris Mason 2415f39d397SChris Mason out: 2425f39d397SChris Mason return em; 2435f39d397SChris Mason } 2445f39d397SChris Mason 245b0496686SLiu Bo u32 btrfs_csum_data(char *data, u32 seed, size_t len) 24619c00ddcSChris Mason { 247163e783eSDavid Woodhouse return crc32c(seed, data, len); 24819c00ddcSChris Mason } 24919c00ddcSChris Mason 25019c00ddcSChris Mason void btrfs_csum_final(u32 crc, char *result) 25119c00ddcSChris Mason { 2527e75bf3fSDavid Sterba put_unaligned_le32(~crc, result); 25319c00ddcSChris Mason } 25419c00ddcSChris Mason 255d352ac68SChris Mason /* 256d352ac68SChris Mason * compute the csum for a btree block, and either verify it or write it 257d352ac68SChris Mason * into the csum field of the block. 258d352ac68SChris Mason */ 25919c00ddcSChris Mason static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, 26019c00ddcSChris Mason int verify) 26119c00ddcSChris Mason { 2626c41761fSDavid Sterba u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy); 263607d432dSJosef Bacik char *result = NULL; 26419c00ddcSChris Mason unsigned long len; 26519c00ddcSChris Mason unsigned long cur_len; 26619c00ddcSChris Mason unsigned long offset = BTRFS_CSUM_SIZE; 26719c00ddcSChris Mason char *kaddr; 26819c00ddcSChris Mason unsigned long map_start; 26919c00ddcSChris Mason unsigned long map_len; 27019c00ddcSChris Mason int err; 27119c00ddcSChris Mason u32 crc = ~(u32)0; 272607d432dSJosef Bacik unsigned long inline_result; 27319c00ddcSChris Mason 27419c00ddcSChris Mason len = buf->len - offset; 27519c00ddcSChris Mason while (len > 0) { 27619c00ddcSChris Mason err = map_private_extent_buffer(buf, offset, 32, 277a6591715SChris Mason &kaddr, &map_start, &map_len); 278d397712bSChris Mason if (err) 27919c00ddcSChris Mason return 1; 28019c00ddcSChris Mason cur_len = min(len, map_len - (offset - map_start)); 281b0496686SLiu Bo crc = btrfs_csum_data(kaddr + offset - map_start, 28219c00ddcSChris Mason crc, cur_len); 28319c00ddcSChris Mason len -= cur_len; 28419c00ddcSChris Mason offset += cur_len; 28519c00ddcSChris Mason } 286607d432dSJosef Bacik if (csum_size > sizeof(inline_result)) { 287607d432dSJosef Bacik result = kzalloc(csum_size * sizeof(char), GFP_NOFS); 288607d432dSJosef Bacik if (!result) 289607d432dSJosef Bacik return 1; 290607d432dSJosef Bacik } else { 291607d432dSJosef Bacik result = (char *)&inline_result; 292607d432dSJosef Bacik } 293607d432dSJosef Bacik 29419c00ddcSChris Mason btrfs_csum_final(crc, result); 29519c00ddcSChris Mason 29619c00ddcSChris Mason if (verify) { 297607d432dSJosef Bacik if (memcmp_extent_buffer(buf, result, 0, csum_size)) { 298e4204dedSChris Mason u32 val; 299e4204dedSChris Mason u32 found = 0; 300607d432dSJosef Bacik memcpy(&found, result, csum_size); 301e4204dedSChris Mason 302607d432dSJosef Bacik read_extent_buffer(buf, &val, 0, csum_size); 3037a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs: %s checksum verify " 304193f284dSChris Mason "failed on %llu wanted %X found %X " 305193f284dSChris Mason "level %d\n", 306c1c9ff7cSGeert Uytterhoeven root->fs_info->sb->s_id, buf->start, 307c1c9ff7cSGeert Uytterhoeven val, found, 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", 348c1c9ff7cSGeert Uytterhoeven eb->start, parent_transid, btrfs_header_generation(eb)); 3491259ab75SChris Mason ret = 1; 3500b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 35133958dc6SChris Mason out: 3522ac55d41SJosef Bacik unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, 3532ac55d41SJosef Bacik &cached_state, GFP_NOFS); 3541259ab75SChris Mason return ret; 3551259ab75SChris Mason } 3561259ab75SChris Mason 357d352ac68SChris Mason /* 3581104a885SDavid Sterba * Return 0 if the superblock checksum type matches the checksum value of that 3591104a885SDavid Sterba * algorithm. Pass the raw disk superblock data. 3601104a885SDavid Sterba */ 3611104a885SDavid Sterba static int btrfs_check_super_csum(char *raw_disk_sb) 3621104a885SDavid Sterba { 3631104a885SDavid Sterba struct btrfs_super_block *disk_sb = 3641104a885SDavid Sterba (struct btrfs_super_block *)raw_disk_sb; 3651104a885SDavid Sterba u16 csum_type = btrfs_super_csum_type(disk_sb); 3661104a885SDavid Sterba int ret = 0; 3671104a885SDavid Sterba 3681104a885SDavid Sterba if (csum_type == BTRFS_CSUM_TYPE_CRC32) { 3691104a885SDavid Sterba u32 crc = ~(u32)0; 3701104a885SDavid Sterba const int csum_size = sizeof(crc); 3711104a885SDavid Sterba char result[csum_size]; 3721104a885SDavid Sterba 3731104a885SDavid Sterba /* 3741104a885SDavid Sterba * The super_block structure does not span the whole 3751104a885SDavid Sterba * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space 3761104a885SDavid Sterba * is filled with zeros and is included in the checkum. 3771104a885SDavid Sterba */ 3781104a885SDavid Sterba crc = btrfs_csum_data(raw_disk_sb + BTRFS_CSUM_SIZE, 3791104a885SDavid Sterba crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); 3801104a885SDavid Sterba btrfs_csum_final(crc, result); 3811104a885SDavid Sterba 3821104a885SDavid Sterba if (memcmp(raw_disk_sb, result, csum_size)) 3831104a885SDavid Sterba ret = 1; 384667e7d94SChris Mason 385667e7d94SChris Mason if (ret && btrfs_super_generation(disk_sb) < 10) { 386667e7d94SChris Mason printk(KERN_WARNING "btrfs: super block crcs don't match, older mkfs detected\n"); 387667e7d94SChris Mason ret = 0; 388667e7d94SChris Mason } 3891104a885SDavid Sterba } 3901104a885SDavid Sterba 3911104a885SDavid Sterba if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) { 3921104a885SDavid Sterba printk(KERN_ERR "btrfs: unsupported checksum algorithm %u\n", 3931104a885SDavid Sterba csum_type); 3941104a885SDavid Sterba ret = 1; 3951104a885SDavid Sterba } 3961104a885SDavid Sterba 3971104a885SDavid Sterba return ret; 3981104a885SDavid Sterba } 3991104a885SDavid Sterba 4001104a885SDavid Sterba /* 401d352ac68SChris Mason * helper to read a given tree block, doing retries as required when 402d352ac68SChris Mason * the checksums don't match and we have alternate mirrors to try. 403d352ac68SChris Mason */ 404f188591eSChris Mason static int btree_read_extent_buffer_pages(struct btrfs_root *root, 405f188591eSChris Mason struct extent_buffer *eb, 406ca7a79adSChris Mason u64 start, u64 parent_transid) 407f188591eSChris Mason { 408f188591eSChris Mason struct extent_io_tree *io_tree; 409ea466794SJosef Bacik int failed = 0; 410f188591eSChris Mason int ret; 411f188591eSChris Mason int num_copies = 0; 412f188591eSChris Mason int mirror_num = 0; 413ea466794SJosef Bacik int failed_mirror = 0; 414f188591eSChris Mason 415a826d6dcSJosef Bacik clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 416f188591eSChris Mason io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; 417f188591eSChris Mason while (1) { 418bb82ab88SArne Jansen ret = read_extent_buffer_pages(io_tree, eb, start, 419bb82ab88SArne Jansen WAIT_COMPLETE, 420f188591eSChris Mason btree_get_extent, mirror_num); 421256dd1bbSStefan Behrens if (!ret) { 422256dd1bbSStefan Behrens if (!verify_parent_transid(io_tree, eb, 423b9fab919SChris Mason parent_transid, 0)) 424ea466794SJosef Bacik break; 425256dd1bbSStefan Behrens else 426256dd1bbSStefan Behrens ret = -EIO; 427256dd1bbSStefan Behrens } 428d397712bSChris Mason 429a826d6dcSJosef Bacik /* 430a826d6dcSJosef Bacik * This buffer's crc is fine, but its contents are corrupted, so 431a826d6dcSJosef Bacik * there is no reason to read the other copies, they won't be 432a826d6dcSJosef Bacik * any less wrong. 433a826d6dcSJosef Bacik */ 434a826d6dcSJosef Bacik if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) 435ea466794SJosef Bacik break; 436ea466794SJosef Bacik 4375d964051SStefan Behrens num_copies = btrfs_num_copies(root->fs_info, 438f188591eSChris Mason eb->start, eb->len); 4394235298eSChris Mason if (num_copies == 1) 440ea466794SJosef Bacik break; 4414235298eSChris Mason 4425cf1ab56SJosef Bacik if (!failed_mirror) { 4435cf1ab56SJosef Bacik failed = 1; 4445cf1ab56SJosef Bacik failed_mirror = eb->read_mirror; 4455cf1ab56SJosef Bacik } 4465cf1ab56SJosef Bacik 447f188591eSChris Mason mirror_num++; 448ea466794SJosef Bacik if (mirror_num == failed_mirror) 449ea466794SJosef Bacik mirror_num++; 450ea466794SJosef Bacik 4514235298eSChris Mason if (mirror_num > num_copies) 452ea466794SJosef Bacik break; 453f188591eSChris Mason } 454ea466794SJosef Bacik 455c0901581SStefan Behrens if (failed && !ret && failed_mirror) 456ea466794SJosef Bacik repair_eb_io_failure(root, eb, failed_mirror); 457ea466794SJosef Bacik 458ea466794SJosef Bacik return ret; 459f188591eSChris Mason } 46019c00ddcSChris Mason 461d352ac68SChris Mason /* 462d397712bSChris Mason * checksum a dirty tree block before IO. This has extra checks to make sure 463d397712bSChris Mason * we only fill in the checksum field in the first page of a multi-page block 464d352ac68SChris Mason */ 465d397712bSChris Mason 466b2950863SChristoph Hellwig static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) 46719c00ddcSChris Mason { 4684eee4fa4SMiao Xie u64 start = page_offset(page); 46919c00ddcSChris Mason u64 found_start; 47019c00ddcSChris Mason struct extent_buffer *eb; 471f188591eSChris 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); 476fae7f21cSDulshani Gunawardhana if (WARN_ON(found_start != start || !PageUptodate(page))) 4774f2de97aSJosef Bacik return 0; 47819c00ddcSChris Mason csum_tree_block(root, eb, 0); 47919c00ddcSChris Mason return 0; 48019c00ddcSChris Mason } 48119c00ddcSChris Mason 4822b82032cSYan Zheng static int check_tree_block_fsid(struct btrfs_root *root, 4832b82032cSYan Zheng struct extent_buffer *eb) 4842b82032cSYan Zheng { 4852b82032cSYan Zheng struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; 4862b82032cSYan Zheng u8 fsid[BTRFS_UUID_SIZE]; 4872b82032cSYan Zheng int ret = 1; 4882b82032cSYan Zheng 4890a4e5586SRoss Kirk read_extent_buffer(eb, fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE); 4902b82032cSYan Zheng while (fs_devices) { 4912b82032cSYan Zheng if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { 4922b82032cSYan Zheng ret = 0; 4932b82032cSYan Zheng break; 4942b82032cSYan Zheng } 4952b82032cSYan Zheng fs_devices = fs_devices->seed; 4962b82032cSYan Zheng } 4972b82032cSYan Zheng return ret; 4982b82032cSYan Zheng } 4992b82032cSYan Zheng 500a826d6dcSJosef Bacik #define CORRUPT(reason, eb, root, slot) \ 501a826d6dcSJosef Bacik printk(KERN_CRIT "btrfs: corrupt leaf, %s: block=%llu," \ 502a826d6dcSJosef Bacik "root=%llu, slot=%d\n", reason, \ 503c1c9ff7cSGeert Uytterhoeven btrfs_header_bytenr(eb), root->objectid, slot) 504a826d6dcSJosef Bacik 505a826d6dcSJosef Bacik static noinline int check_leaf(struct btrfs_root *root, 506a826d6dcSJosef Bacik struct extent_buffer *leaf) 507a826d6dcSJosef Bacik { 508a826d6dcSJosef Bacik struct btrfs_key key; 509a826d6dcSJosef Bacik struct btrfs_key leaf_key; 510a826d6dcSJosef Bacik u32 nritems = btrfs_header_nritems(leaf); 511a826d6dcSJosef Bacik int slot; 512a826d6dcSJosef Bacik 513a826d6dcSJosef Bacik if (nritems == 0) 514a826d6dcSJosef Bacik return 0; 515a826d6dcSJosef Bacik 516a826d6dcSJosef Bacik /* Check the 0 item */ 517a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != 518a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 519a826d6dcSJosef Bacik CORRUPT("invalid item offset size pair", leaf, root, 0); 520a826d6dcSJosef Bacik return -EIO; 521a826d6dcSJosef Bacik } 522a826d6dcSJosef Bacik 523a826d6dcSJosef Bacik /* 524a826d6dcSJosef Bacik * Check to make sure each items keys are in the correct order and their 525a826d6dcSJosef Bacik * offsets make sense. We only have to loop through nritems-1 because 526a826d6dcSJosef Bacik * we check the current slot against the next slot, which verifies the 527a826d6dcSJosef Bacik * next slot's offset+size makes sense and that the current's slot 528a826d6dcSJosef Bacik * offset is correct. 529a826d6dcSJosef Bacik */ 530a826d6dcSJosef Bacik for (slot = 0; slot < nritems - 1; slot++) { 531a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &leaf_key, slot); 532a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &key, slot + 1); 533a826d6dcSJosef Bacik 534a826d6dcSJosef Bacik /* Make sure the keys are in the right order */ 535a826d6dcSJosef Bacik if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { 536a826d6dcSJosef Bacik CORRUPT("bad key order", leaf, root, slot); 537a826d6dcSJosef Bacik return -EIO; 538a826d6dcSJosef Bacik } 539a826d6dcSJosef Bacik 540a826d6dcSJosef Bacik /* 541a826d6dcSJosef Bacik * Make sure the offset and ends are right, remember that the 542a826d6dcSJosef Bacik * item data starts at the end of the leaf and grows towards the 543a826d6dcSJosef Bacik * front. 544a826d6dcSJosef Bacik */ 545a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, slot) != 546a826d6dcSJosef Bacik btrfs_item_end_nr(leaf, slot + 1)) { 547a826d6dcSJosef Bacik CORRUPT("slot offset bad", leaf, root, slot); 548a826d6dcSJosef Bacik return -EIO; 549a826d6dcSJosef Bacik } 550a826d6dcSJosef Bacik 551a826d6dcSJosef Bacik /* 552a826d6dcSJosef Bacik * Check to make sure that we don't point outside of the leaf, 553a826d6dcSJosef Bacik * just incase all the items are consistent to eachother, but 554a826d6dcSJosef Bacik * all point outside of the leaf. 555a826d6dcSJosef Bacik */ 556a826d6dcSJosef Bacik if (btrfs_item_end_nr(leaf, slot) > 557a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 558a826d6dcSJosef Bacik CORRUPT("slot end outside of leaf", leaf, root, slot); 559a826d6dcSJosef Bacik return -EIO; 560a826d6dcSJosef Bacik } 561a826d6dcSJosef Bacik } 562a826d6dcSJosef Bacik 563a826d6dcSJosef Bacik return 0; 564a826d6dcSJosef Bacik } 565a826d6dcSJosef Bacik 566facc8a22SMiao Xie static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio, 567facc8a22SMiao Xie u64 phy_offset, struct page *page, 568facc8a22SMiao Xie u64 start, u64 end, int mirror) 569ce9adaa5SChris Mason { 570ce9adaa5SChris Mason u64 found_start; 571ce9adaa5SChris Mason int found_level; 572ce9adaa5SChris Mason struct extent_buffer *eb; 573ce9adaa5SChris Mason struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 574f188591eSChris Mason int ret = 0; 575727011e0SChris Mason int reads_done; 576ce9adaa5SChris Mason 577ce9adaa5SChris Mason if (!page->private) 578ce9adaa5SChris Mason goto out; 579d397712bSChris Mason 5804f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 581d397712bSChris Mason 5820b32f4bbSJosef Bacik /* the pending IO might have been the only thing that kept this buffer 5830b32f4bbSJosef Bacik * in memory. Make sure we have a ref for all this other checks 5840b32f4bbSJosef Bacik */ 5850b32f4bbSJosef Bacik extent_buffer_get(eb); 5860b32f4bbSJosef Bacik 5870b32f4bbSJosef Bacik reads_done = atomic_dec_and_test(&eb->io_pages); 588727011e0SChris Mason if (!reads_done) 589727011e0SChris Mason goto err; 590f188591eSChris Mason 5915cf1ab56SJosef Bacik eb->read_mirror = mirror; 592ea466794SJosef Bacik if (test_bit(EXTENT_BUFFER_IOERR, &eb->bflags)) { 593ea466794SJosef Bacik ret = -EIO; 594ea466794SJosef Bacik goto err; 595ea466794SJosef Bacik } 596ea466794SJosef Bacik 597ce9adaa5SChris Mason found_start = btrfs_header_bytenr(eb); 598727011e0SChris Mason if (found_start != eb->start) { 5997a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs bad tree block start " 600193f284dSChris Mason "%llu %llu\n", 601c1c9ff7cSGeert Uytterhoeven found_start, eb->start); 602f188591eSChris Mason ret = -EIO; 603ce9adaa5SChris Mason goto err; 604ce9adaa5SChris Mason } 6052b82032cSYan Zheng if (check_tree_block_fsid(root, eb)) { 6067a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs bad fsid on block %llu\n", 607c1c9ff7cSGeert Uytterhoeven eb->start); 6081259ab75SChris Mason ret = -EIO; 6091259ab75SChris Mason goto err; 6101259ab75SChris Mason } 611ce9adaa5SChris Mason found_level = btrfs_header_level(eb); 6121c24c3ceSJosef Bacik if (found_level >= BTRFS_MAX_LEVEL) { 6131c24c3ceSJosef Bacik btrfs_info(root->fs_info, "bad tree block level %d\n", 6141c24c3ceSJosef Bacik (int)btrfs_header_level(eb)); 6151c24c3ceSJosef Bacik ret = -EIO; 6161c24c3ceSJosef Bacik goto err; 6171c24c3ceSJosef Bacik } 618ce9adaa5SChris Mason 61985d4e461SChris Mason btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), 62085d4e461SChris Mason eb, found_level); 6214008c04aSChris Mason 622ce9adaa5SChris Mason ret = csum_tree_block(root, eb, 1); 623a826d6dcSJosef Bacik if (ret) { 624f188591eSChris Mason ret = -EIO; 625a826d6dcSJosef Bacik goto err; 626a826d6dcSJosef Bacik } 627a826d6dcSJosef Bacik 628a826d6dcSJosef Bacik /* 629a826d6dcSJosef Bacik * If this is a leaf block and it is corrupt, set the corrupt bit so 630a826d6dcSJosef Bacik * that we don't try and read the other copies of this block, just 631a826d6dcSJosef Bacik * return -EIO. 632a826d6dcSJosef Bacik */ 633a826d6dcSJosef Bacik if (found_level == 0 && check_leaf(root, eb)) { 634a826d6dcSJosef Bacik set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 635a826d6dcSJosef Bacik ret = -EIO; 636a826d6dcSJosef Bacik } 637ce9adaa5SChris Mason 6380b32f4bbSJosef Bacik if (!ret) 6390b32f4bbSJosef Bacik set_extent_buffer_uptodate(eb); 640ce9adaa5SChris Mason err: 64179fb65a1SJosef Bacik if (reads_done && 64279fb65a1SJosef Bacik test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 6434bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, ret); 6444bb31e92SArne Jansen 64553b381b3SDavid Woodhouse if (ret) { 64653b381b3SDavid Woodhouse /* 64753b381b3SDavid Woodhouse * our io error hook is going to dec the io pages 64853b381b3SDavid Woodhouse * again, we have to make sure it has something 64953b381b3SDavid Woodhouse * to decrement 65053b381b3SDavid Woodhouse */ 65153b381b3SDavid Woodhouse atomic_inc(&eb->io_pages); 6520b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 65353b381b3SDavid Woodhouse } 6540b32f4bbSJosef Bacik free_extent_buffer(eb); 655ce9adaa5SChris Mason out: 656f188591eSChris Mason return ret; 657ce9adaa5SChris Mason } 658ce9adaa5SChris Mason 659ea466794SJosef Bacik static int btree_io_failed_hook(struct page *page, int failed_mirror) 6604bb31e92SArne Jansen { 6614bb31e92SArne Jansen struct extent_buffer *eb; 6624bb31e92SArne Jansen struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 6634bb31e92SArne Jansen 6644f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 665ea466794SJosef Bacik set_bit(EXTENT_BUFFER_IOERR, &eb->bflags); 6665cf1ab56SJosef Bacik eb->read_mirror = failed_mirror; 66753b381b3SDavid Woodhouse atomic_dec(&eb->io_pages); 668ea466794SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 6694bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, -EIO); 6704bb31e92SArne Jansen return -EIO; /* we fixed nothing */ 6714bb31e92SArne Jansen } 6724bb31e92SArne Jansen 673ce9adaa5SChris Mason static void end_workqueue_bio(struct bio *bio, int err) 674ce9adaa5SChris Mason { 675ce9adaa5SChris Mason struct end_io_wq *end_io_wq = bio->bi_private; 676ce9adaa5SChris Mason struct btrfs_fs_info *fs_info; 677ce9adaa5SChris Mason 678ce9adaa5SChris Mason fs_info = end_io_wq->info; 679ce9adaa5SChris Mason end_io_wq->error = err; 6808b712842SChris Mason end_io_wq->work.func = end_workqueue_fn; 6818b712842SChris Mason end_io_wq->work.flags = 0; 682d20f7043SChris Mason 6837b6d91daSChristoph Hellwig if (bio->bi_rw & REQ_WRITE) { 68453b381b3SDavid Woodhouse if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) 685cad321adSChris Mason btrfs_queue_worker(&fs_info->endio_meta_write_workers, 686cad321adSChris Mason &end_io_wq->work); 68753b381b3SDavid Woodhouse else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) 6880cb59c99SJosef Bacik btrfs_queue_worker(&fs_info->endio_freespace_worker, 6890cb59c99SJosef Bacik &end_io_wq->work); 69053b381b3SDavid Woodhouse else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 69153b381b3SDavid Woodhouse btrfs_queue_worker(&fs_info->endio_raid56_workers, 69253b381b3SDavid Woodhouse &end_io_wq->work); 693cad321adSChris Mason else 694e6dcd2dcSChris Mason btrfs_queue_worker(&fs_info->endio_write_workers, 695e6dcd2dcSChris Mason &end_io_wq->work); 696d20f7043SChris Mason } else { 69753b381b3SDavid Woodhouse if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 69853b381b3SDavid Woodhouse btrfs_queue_worker(&fs_info->endio_raid56_workers, 69953b381b3SDavid Woodhouse &end_io_wq->work); 70053b381b3SDavid Woodhouse else if (end_io_wq->metadata) 701d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_meta_workers, 702d20f7043SChris Mason &end_io_wq->work); 703e6dcd2dcSChris Mason else 704d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_workers, 705d20f7043SChris Mason &end_io_wq->work); 706d20f7043SChris Mason } 707ce9adaa5SChris Mason } 708ce9adaa5SChris Mason 7090cb59c99SJosef Bacik /* 7100cb59c99SJosef Bacik * For the metadata arg you want 7110cb59c99SJosef Bacik * 7120cb59c99SJosef Bacik * 0 - if data 7130cb59c99SJosef Bacik * 1 - if normal metadta 7140cb59c99SJosef Bacik * 2 - if writing to the free space cache area 71553b381b3SDavid Woodhouse * 3 - raid parity work 7160cb59c99SJosef Bacik */ 71722c59948SChris Mason int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, 71822c59948SChris Mason int metadata) 7190b86a832SChris Mason { 720ce9adaa5SChris Mason struct end_io_wq *end_io_wq; 721ce9adaa5SChris Mason end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); 722ce9adaa5SChris Mason if (!end_io_wq) 723ce9adaa5SChris Mason return -ENOMEM; 724ce9adaa5SChris Mason 725ce9adaa5SChris Mason end_io_wq->private = bio->bi_private; 726ce9adaa5SChris Mason end_io_wq->end_io = bio->bi_end_io; 72722c59948SChris Mason end_io_wq->info = info; 728ce9adaa5SChris Mason end_io_wq->error = 0; 729ce9adaa5SChris Mason end_io_wq->bio = bio; 73022c59948SChris Mason end_io_wq->metadata = metadata; 731ce9adaa5SChris Mason 732ce9adaa5SChris Mason bio->bi_private = end_io_wq; 733ce9adaa5SChris Mason bio->bi_end_io = end_workqueue_bio; 73422c59948SChris Mason return 0; 73522c59948SChris Mason } 73622c59948SChris Mason 737b64a2851SChris Mason unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) 7384854ddd0SChris Mason { 7394854ddd0SChris Mason unsigned long limit = min_t(unsigned long, 7404854ddd0SChris Mason info->workers.max_workers, 7414854ddd0SChris Mason info->fs_devices->open_devices); 7424854ddd0SChris Mason return 256 * limit; 7434854ddd0SChris Mason } 7444854ddd0SChris Mason 7454a69a410SChris Mason static void run_one_async_start(struct btrfs_work *work) 7464a69a410SChris Mason { 7474a69a410SChris Mason struct async_submit_bio *async; 74879787eaaSJeff Mahoney int ret; 7494a69a410SChris Mason 7504a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 75179787eaaSJeff Mahoney ret = async->submit_bio_start(async->inode, async->rw, async->bio, 752eaf25d93SChris Mason async->mirror_num, async->bio_flags, 753eaf25d93SChris Mason async->bio_offset); 75479787eaaSJeff Mahoney if (ret) 75579787eaaSJeff Mahoney async->error = ret; 7564a69a410SChris Mason } 7574a69a410SChris Mason 7584a69a410SChris Mason static void run_one_async_done(struct btrfs_work *work) 7598b712842SChris Mason { 7608b712842SChris Mason struct btrfs_fs_info *fs_info; 7618b712842SChris Mason struct async_submit_bio *async; 7624854ddd0SChris Mason int limit; 7638b712842SChris Mason 7648b712842SChris Mason async = container_of(work, struct async_submit_bio, work); 7658b712842SChris Mason fs_info = BTRFS_I(async->inode)->root->fs_info; 7664854ddd0SChris Mason 767b64a2851SChris Mason limit = btrfs_async_submit_limit(fs_info); 7684854ddd0SChris Mason limit = limit * 2 / 3; 7694854ddd0SChris Mason 77066657b31SJosef Bacik if (atomic_dec_return(&fs_info->nr_async_submits) < limit && 771b64a2851SChris Mason waitqueue_active(&fs_info->async_submit_wait)) 7724854ddd0SChris Mason wake_up(&fs_info->async_submit_wait); 7734854ddd0SChris Mason 77479787eaaSJeff Mahoney /* If an error occured we just want to clean up the bio and move on */ 77579787eaaSJeff Mahoney if (async->error) { 77679787eaaSJeff Mahoney bio_endio(async->bio, async->error); 77779787eaaSJeff Mahoney return; 77879787eaaSJeff Mahoney } 77979787eaaSJeff Mahoney 7804a69a410SChris Mason async->submit_bio_done(async->inode, async->rw, async->bio, 781eaf25d93SChris Mason async->mirror_num, async->bio_flags, 782eaf25d93SChris Mason async->bio_offset); 7834a69a410SChris Mason } 7844a69a410SChris Mason 7854a69a410SChris Mason static void run_one_async_free(struct btrfs_work *work) 7864a69a410SChris Mason { 7874a69a410SChris Mason struct async_submit_bio *async; 7884a69a410SChris Mason 7894a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 7908b712842SChris Mason kfree(async); 7918b712842SChris Mason } 7928b712842SChris Mason 79344b8bd7eSChris Mason int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, 79444b8bd7eSChris Mason int rw, struct bio *bio, int mirror_num, 795c8b97818SChris Mason unsigned long bio_flags, 796eaf25d93SChris Mason u64 bio_offset, 7974a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start, 7984a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done) 79944b8bd7eSChris Mason { 80044b8bd7eSChris Mason struct async_submit_bio *async; 80144b8bd7eSChris Mason 80244b8bd7eSChris Mason async = kmalloc(sizeof(*async), GFP_NOFS); 80344b8bd7eSChris Mason if (!async) 80444b8bd7eSChris Mason return -ENOMEM; 80544b8bd7eSChris Mason 80644b8bd7eSChris Mason async->inode = inode; 80744b8bd7eSChris Mason async->rw = rw; 80844b8bd7eSChris Mason async->bio = bio; 80944b8bd7eSChris Mason async->mirror_num = mirror_num; 8104a69a410SChris Mason async->submit_bio_start = submit_bio_start; 8114a69a410SChris Mason async->submit_bio_done = submit_bio_done; 8124a69a410SChris Mason 8134a69a410SChris Mason async->work.func = run_one_async_start; 8144a69a410SChris Mason async->work.ordered_func = run_one_async_done; 8154a69a410SChris Mason async->work.ordered_free = run_one_async_free; 8164a69a410SChris Mason 8178b712842SChris Mason async->work.flags = 0; 818c8b97818SChris Mason async->bio_flags = bio_flags; 819eaf25d93SChris Mason async->bio_offset = bio_offset; 8208c8bee1dSChris Mason 82179787eaaSJeff Mahoney async->error = 0; 82279787eaaSJeff Mahoney 823cb03c743SChris Mason atomic_inc(&fs_info->nr_async_submits); 824d313d7a3SChris Mason 8257b6d91daSChristoph Hellwig if (rw & REQ_SYNC) 826d313d7a3SChris Mason btrfs_set_work_high_prio(&async->work); 827d313d7a3SChris Mason 8288b712842SChris Mason btrfs_queue_worker(&fs_info->workers, &async->work); 8299473f16cSChris Mason 830771ed689SChris Mason while (atomic_read(&fs_info->async_submit_draining) && 831771ed689SChris Mason atomic_read(&fs_info->nr_async_submits)) { 832771ed689SChris Mason wait_event(fs_info->async_submit_wait, 833771ed689SChris Mason (atomic_read(&fs_info->nr_async_submits) == 0)); 834771ed689SChris Mason } 835771ed689SChris Mason 83644b8bd7eSChris Mason return 0; 83744b8bd7eSChris Mason } 83844b8bd7eSChris Mason 839ce3ed71aSChris Mason static int btree_csum_one_bio(struct bio *bio) 840ce3ed71aSChris Mason { 841ce3ed71aSChris Mason struct bio_vec *bvec = bio->bi_io_vec; 842ce3ed71aSChris Mason int bio_index = 0; 843ce3ed71aSChris Mason struct btrfs_root *root; 84479787eaaSJeff Mahoney int ret = 0; 845ce3ed71aSChris Mason 846ce3ed71aSChris Mason WARN_ON(bio->bi_vcnt <= 0); 847ce3ed71aSChris Mason while (bio_index < bio->bi_vcnt) { 848ce3ed71aSChris Mason root = BTRFS_I(bvec->bv_page->mapping->host)->root; 84979787eaaSJeff Mahoney ret = csum_dirty_buffer(root, bvec->bv_page); 85079787eaaSJeff Mahoney if (ret) 85179787eaaSJeff Mahoney break; 852ce3ed71aSChris Mason bio_index++; 853ce3ed71aSChris Mason bvec++; 854ce3ed71aSChris Mason } 85579787eaaSJeff Mahoney return ret; 856ce3ed71aSChris Mason } 857ce3ed71aSChris Mason 8584a69a410SChris Mason static int __btree_submit_bio_start(struct inode *inode, int rw, 8594a69a410SChris Mason struct bio *bio, int mirror_num, 860eaf25d93SChris Mason unsigned long bio_flags, 861eaf25d93SChris Mason u64 bio_offset) 86222c59948SChris Mason { 8638b712842SChris Mason /* 8648b712842SChris Mason * when we're called for a write, we're already in the async 8655443be45SChris Mason * submission context. Just jump into btrfs_map_bio 8668b712842SChris Mason */ 86779787eaaSJeff Mahoney return btree_csum_one_bio(bio); 86822c59948SChris Mason } 86922c59948SChris Mason 8704a69a410SChris Mason static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, 871eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 872eaf25d93SChris Mason u64 bio_offset) 8734a69a410SChris Mason { 87461891923SStefan Behrens int ret; 87561891923SStefan Behrens 8768b712842SChris Mason /* 8774a69a410SChris Mason * when we're called for a write, we're already in the async 8784a69a410SChris Mason * submission context. Just jump into btrfs_map_bio 8798b712842SChris Mason */ 88061891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); 88161891923SStefan Behrens if (ret) 88261891923SStefan Behrens bio_endio(bio, ret); 88361891923SStefan Behrens return ret; 8840b86a832SChris Mason } 8850b86a832SChris Mason 886de0022b9SJosef Bacik static int check_async_write(struct inode *inode, unsigned long bio_flags) 887de0022b9SJosef Bacik { 888de0022b9SJosef Bacik if (bio_flags & EXTENT_BIO_TREE_LOG) 889de0022b9SJosef Bacik return 0; 890de0022b9SJosef Bacik #ifdef CONFIG_X86 891de0022b9SJosef Bacik if (cpu_has_xmm4_2) 892de0022b9SJosef Bacik return 0; 893de0022b9SJosef Bacik #endif 894de0022b9SJosef Bacik return 1; 895de0022b9SJosef Bacik } 896de0022b9SJosef Bacik 89744b8bd7eSChris Mason static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, 898eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 899eaf25d93SChris Mason u64 bio_offset) 90044b8bd7eSChris Mason { 901de0022b9SJosef Bacik int async = check_async_write(inode, bio_flags); 9024a69a410SChris Mason int ret; 903cad321adSChris Mason 9047b6d91daSChristoph Hellwig if (!(rw & REQ_WRITE)) { 905cad321adSChris Mason /* 906cad321adSChris Mason * called for a read, do the setup so that checksum validation 907cad321adSChris Mason * can happen in the async kernel threads 908cad321adSChris Mason */ 909f3f266abSChris Mason ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, 910f3f266abSChris Mason bio, 1); 9111d4284bdSChris Mason if (ret) 91261891923SStefan Behrens goto out_w_error; 91361891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 9146f3577bdSChris Mason mirror_num, 0); 915de0022b9SJosef Bacik } else if (!async) { 916de0022b9SJosef Bacik ret = btree_csum_one_bio(bio); 917de0022b9SJosef Bacik if (ret) 91861891923SStefan Behrens goto out_w_error; 91961891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 920de0022b9SJosef Bacik mirror_num, 0); 92161891923SStefan Behrens } else { 922cad321adSChris Mason /* 92361891923SStefan Behrens * kthread helpers are used to submit writes so that 92461891923SStefan Behrens * checksumming can happen in parallel across all CPUs 925cad321adSChris Mason */ 92661891923SStefan Behrens ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, 927c8b97818SChris Mason inode, rw, bio, mirror_num, 0, 928eaf25d93SChris Mason bio_offset, 9294a69a410SChris Mason __btree_submit_bio_start, 9304a69a410SChris Mason __btree_submit_bio_done); 93144b8bd7eSChris Mason } 93244b8bd7eSChris Mason 93361891923SStefan Behrens if (ret) { 93461891923SStefan Behrens out_w_error: 93561891923SStefan Behrens bio_endio(bio, ret); 93661891923SStefan Behrens } 93761891923SStefan Behrens return ret; 93861891923SStefan Behrens } 93961891923SStefan Behrens 9403dd1462eSJan Beulich #ifdef CONFIG_MIGRATION 941784b4e29SChris Mason static int btree_migratepage(struct address_space *mapping, 942a6bc32b8SMel Gorman struct page *newpage, struct page *page, 943a6bc32b8SMel Gorman enum migrate_mode mode) 944784b4e29SChris Mason { 945784b4e29SChris Mason /* 946784b4e29SChris Mason * we can't safely write a btree page from here, 947784b4e29SChris Mason * we haven't done the locking hook 948784b4e29SChris Mason */ 949784b4e29SChris Mason if (PageDirty(page)) 950784b4e29SChris Mason return -EAGAIN; 951784b4e29SChris Mason /* 952784b4e29SChris Mason * Buffers may be managed in a filesystem specific way. 953784b4e29SChris Mason * We must have no buffers or drop them. 954784b4e29SChris Mason */ 955784b4e29SChris Mason if (page_has_private(page) && 956784b4e29SChris Mason !try_to_release_page(page, GFP_KERNEL)) 957784b4e29SChris Mason return -EAGAIN; 958a6bc32b8SMel Gorman return migrate_page(mapping, newpage, page, mode); 959784b4e29SChris Mason } 9603dd1462eSJan Beulich #endif 961784b4e29SChris Mason 9620da5468fSChris Mason 9630da5468fSChris Mason static int btree_writepages(struct address_space *mapping, 9640da5468fSChris Mason struct writeback_control *wbc) 9650da5468fSChris Mason { 966e2d84521SMiao Xie struct btrfs_fs_info *fs_info; 967e2d84521SMiao Xie int ret; 968e2d84521SMiao Xie 969d8d5f3e1SChris Mason if (wbc->sync_mode == WB_SYNC_NONE) { 970448d640bSChris Mason 971448d640bSChris Mason if (wbc->for_kupdate) 972448d640bSChris Mason return 0; 973448d640bSChris Mason 974e2d84521SMiao Xie fs_info = BTRFS_I(mapping->host)->root->fs_info; 975b9473439SChris Mason /* this is a bit racy, but that's ok */ 976e2d84521SMiao Xie ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, 977e2d84521SMiao Xie BTRFS_DIRTY_METADATA_THRESH); 978e2d84521SMiao Xie if (ret < 0) 979793955bcSChris Mason return 0; 980793955bcSChris Mason } 9810b32f4bbSJosef Bacik return btree_write_cache_pages(mapping, wbc); 9820da5468fSChris Mason } 9830da5468fSChris Mason 984b2950863SChristoph Hellwig static int btree_readpage(struct file *file, struct page *page) 9855f39d397SChris Mason { 986d1310b2eSChris Mason struct extent_io_tree *tree; 987d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 9888ddc7d9cSJan Schmidt return extent_read_full_page(tree, page, btree_get_extent, 0); 9895f39d397SChris Mason } 9905f39d397SChris Mason 99170dec807SChris Mason static int btree_releasepage(struct page *page, gfp_t gfp_flags) 9925f39d397SChris Mason { 99398509cfcSChris Mason if (PageWriteback(page) || PageDirty(page)) 99498509cfcSChris Mason return 0; 9950c4e538bSDavid Sterba 996f7a52a40SDavid Sterba return try_release_extent_buffer(page); 997d98237b3SChris Mason } 998d98237b3SChris Mason 999d47992f8SLukas Czerner static void btree_invalidatepage(struct page *page, unsigned int offset, 1000d47992f8SLukas Czerner unsigned int length) 1001d98237b3SChris Mason { 1002d1310b2eSChris Mason struct extent_io_tree *tree; 1003d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 10045f39d397SChris Mason extent_invalidatepage(tree, page, offset); 10055f39d397SChris Mason btree_releasepage(page, GFP_NOFS); 10069ad6b7bcSChris Mason if (PagePrivate(page)) { 1007d397712bSChris Mason printk(KERN_WARNING "btrfs warning page private not zero " 1008d397712bSChris Mason "on page %llu\n", (unsigned long long)page_offset(page)); 10099ad6b7bcSChris Mason ClearPagePrivate(page); 10109ad6b7bcSChris Mason set_page_private(page, 0); 10119ad6b7bcSChris Mason page_cache_release(page); 10129ad6b7bcSChris Mason } 1013d98237b3SChris Mason } 1014d98237b3SChris Mason 10150b32f4bbSJosef Bacik static int btree_set_page_dirty(struct page *page) 10160b32f4bbSJosef Bacik { 1017bb146eb2SJosef Bacik #ifdef DEBUG 10180b32f4bbSJosef Bacik struct extent_buffer *eb; 10190b32f4bbSJosef Bacik 10200b32f4bbSJosef Bacik BUG_ON(!PagePrivate(page)); 10210b32f4bbSJosef Bacik eb = (struct extent_buffer *)page->private; 10220b32f4bbSJosef Bacik BUG_ON(!eb); 10230b32f4bbSJosef Bacik BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); 10240b32f4bbSJosef Bacik BUG_ON(!atomic_read(&eb->refs)); 10250b32f4bbSJosef Bacik btrfs_assert_tree_locked(eb); 1026bb146eb2SJosef Bacik #endif 10270b32f4bbSJosef Bacik return __set_page_dirty_nobuffers(page); 10280b32f4bbSJosef Bacik } 10290b32f4bbSJosef Bacik 10307f09410bSAlexey Dobriyan static const struct address_space_operations btree_aops = { 1031d98237b3SChris Mason .readpage = btree_readpage, 10320da5468fSChris Mason .writepages = btree_writepages, 10335f39d397SChris Mason .releasepage = btree_releasepage, 10345f39d397SChris Mason .invalidatepage = btree_invalidatepage, 10355a92bc88SChris Mason #ifdef CONFIG_MIGRATION 1036784b4e29SChris Mason .migratepage = btree_migratepage, 10375a92bc88SChris Mason #endif 10380b32f4bbSJosef Bacik .set_page_dirty = btree_set_page_dirty, 1039d98237b3SChris Mason }; 1040123abc88SChris Mason 1041ca7a79adSChris Mason int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, 1042ca7a79adSChris Mason u64 parent_transid) 1043090d1875SChris Mason { 10445f39d397SChris Mason struct extent_buffer *buf = NULL; 10455f39d397SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 1046de428b63SChris Mason int ret = 0; 1047090d1875SChris Mason 1048db94535dSChris Mason buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 10495f39d397SChris Mason if (!buf) 1050090d1875SChris Mason return 0; 1051d1310b2eSChris Mason read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, 1052bb82ab88SArne Jansen buf, 0, WAIT_NONE, btree_get_extent, 0); 10535f39d397SChris Mason free_extent_buffer(buf); 1054de428b63SChris Mason return ret; 1055090d1875SChris Mason } 1056090d1875SChris Mason 1057ab0fff03SArne Jansen int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, 1058ab0fff03SArne Jansen int mirror_num, struct extent_buffer **eb) 1059ab0fff03SArne Jansen { 1060ab0fff03SArne Jansen struct extent_buffer *buf = NULL; 1061ab0fff03SArne Jansen struct inode *btree_inode = root->fs_info->btree_inode; 1062ab0fff03SArne Jansen struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; 1063ab0fff03SArne Jansen int ret; 1064ab0fff03SArne Jansen 1065ab0fff03SArne Jansen buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 1066ab0fff03SArne Jansen if (!buf) 1067ab0fff03SArne Jansen return 0; 1068ab0fff03SArne Jansen 1069ab0fff03SArne Jansen set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); 1070ab0fff03SArne Jansen 1071ab0fff03SArne Jansen ret = read_extent_buffer_pages(io_tree, buf, 0, WAIT_PAGE_LOCK, 1072ab0fff03SArne Jansen btree_get_extent, mirror_num); 1073ab0fff03SArne Jansen if (ret) { 1074ab0fff03SArne Jansen free_extent_buffer(buf); 1075ab0fff03SArne Jansen return ret; 1076ab0fff03SArne Jansen } 1077ab0fff03SArne Jansen 1078ab0fff03SArne Jansen if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { 1079ab0fff03SArne Jansen free_extent_buffer(buf); 1080ab0fff03SArne Jansen return -EIO; 10810b32f4bbSJosef Bacik } else if (extent_buffer_uptodate(buf)) { 1082ab0fff03SArne Jansen *eb = buf; 1083ab0fff03SArne Jansen } else { 1084ab0fff03SArne Jansen free_extent_buffer(buf); 1085ab0fff03SArne Jansen } 1086ab0fff03SArne Jansen return 0; 1087ab0fff03SArne Jansen } 1088ab0fff03SArne Jansen 10890999df54SChris Mason struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, 10900999df54SChris Mason u64 bytenr, u32 blocksize) 10910999df54SChris Mason { 1092f28491e0SJosef Bacik return find_extent_buffer(root->fs_info, bytenr); 10930999df54SChris Mason } 10940999df54SChris Mason 10950999df54SChris Mason struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, 10960999df54SChris Mason u64 bytenr, u32 blocksize) 10970999df54SChris Mason { 1098f28491e0SJosef Bacik return alloc_extent_buffer(root->fs_info, bytenr, blocksize); 10990999df54SChris Mason } 11000999df54SChris Mason 11010999df54SChris Mason 1102e02119d5SChris Mason int btrfs_write_tree_block(struct extent_buffer *buf) 1103e02119d5SChris Mason { 1104727011e0SChris Mason return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, 11058aa38c31SChristoph Hellwig buf->start + buf->len - 1); 1106e02119d5SChris Mason } 1107e02119d5SChris Mason 1108e02119d5SChris Mason int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) 1109e02119d5SChris Mason { 1110727011e0SChris Mason return filemap_fdatawait_range(buf->pages[0]->mapping, 11118aa38c31SChristoph Hellwig buf->start, buf->start + buf->len - 1); 1112e02119d5SChris Mason } 1113e02119d5SChris Mason 1114db94535dSChris Mason struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, 1115ca7a79adSChris Mason u32 blocksize, u64 parent_transid) 1116e20d96d6SChris Mason { 11175f39d397SChris Mason struct extent_buffer *buf = NULL; 111819c00ddcSChris Mason int ret; 111919c00ddcSChris Mason 1120db94535dSChris Mason buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 11215f39d397SChris Mason if (!buf) 1122d98237b3SChris Mason return NULL; 1123e4204dedSChris Mason 1124ca7a79adSChris Mason ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 11250f0fe8f7SFilipe David Borba Manana if (ret) { 11260f0fe8f7SFilipe David Borba Manana free_extent_buffer(buf); 11270f0fe8f7SFilipe David Borba Manana return NULL; 11280f0fe8f7SFilipe David Borba Manana } 11295f39d397SChris Mason return buf; 1130ce9adaa5SChris Mason 1131eb60ceacSChris Mason } 1132eb60ceacSChris Mason 1133d5c13f92SJeff Mahoney void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, 11345f39d397SChris Mason struct extent_buffer *buf) 1135ed2ff2cbSChris Mason { 1136e2d84521SMiao Xie struct btrfs_fs_info *fs_info = root->fs_info; 1137e2d84521SMiao Xie 113855c69072SChris Mason if (btrfs_header_generation(buf) == 1139e2d84521SMiao Xie fs_info->running_transaction->transid) { 1140b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 1141b4ce94deSChris Mason 1142b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { 1143e2d84521SMiao Xie __percpu_counter_add(&fs_info->dirty_metadata_bytes, 1144e2d84521SMiao Xie -buf->len, 1145e2d84521SMiao Xie fs_info->dirty_metadata_batch); 1146b9473439SChris Mason /* ugh, clear_extent_buffer_dirty needs to lock the page */ 1147b9473439SChris Mason btrfs_set_lock_blocking(buf); 11480b32f4bbSJosef Bacik clear_extent_buffer_dirty(buf); 1149925baeddSChris Mason } 11505f39d397SChris Mason } 1151ed7b63ebSJosef Bacik } 11525f39d397SChris Mason 1153143bede5SJeff Mahoney static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, 115487ee04ebSChris Mason u32 stripesize, struct btrfs_root *root, 11559f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 1156e20d96d6SChris Mason u64 objectid) 1157d97e63b6SChris Mason { 1158cfaa7295SChris Mason root->node = NULL; 1159a28ec197SChris Mason root->commit_root = NULL; 1160db94535dSChris Mason root->sectorsize = sectorsize; 1161db94535dSChris Mason root->nodesize = nodesize; 1162db94535dSChris Mason root->leafsize = leafsize; 116387ee04ebSChris Mason root->stripesize = stripesize; 1164123abc88SChris Mason root->ref_cows = 0; 11650b86a832SChris Mason root->track_dirty = 0; 1166c71bf099SYan, Zheng root->in_radix = 0; 1167d68fc57bSYan, Zheng root->orphan_item_inserted = 0; 1168d68fc57bSYan, Zheng root->orphan_cleanup_state = 0; 11690b86a832SChris Mason 11700f7d52f4SChris Mason root->objectid = objectid; 11710f7d52f4SChris Mason root->last_trans = 0; 117213a8a7c8SYan, Zheng root->highest_objectid = 0; 1173eb73c1b7SMiao Xie root->nr_delalloc_inodes = 0; 1174199c2a9cSMiao Xie root->nr_ordered_extents = 0; 117558176a96SJosef Bacik root->name = NULL; 11766bef4d31SEric Paris root->inode_tree = RB_ROOT; 117716cdcec7SMiao Xie INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); 1178f0486c68SYan, Zheng root->block_rsv = NULL; 1179d68fc57bSYan, Zheng root->orphan_block_rsv = NULL; 11800b86a832SChris Mason 11810b86a832SChris Mason INIT_LIST_HEAD(&root->dirty_list); 11825d4f98a2SYan Zheng INIT_LIST_HEAD(&root->root_list); 1183eb73c1b7SMiao Xie INIT_LIST_HEAD(&root->delalloc_inodes); 1184eb73c1b7SMiao Xie INIT_LIST_HEAD(&root->delalloc_root); 1185199c2a9cSMiao Xie INIT_LIST_HEAD(&root->ordered_extents); 1186199c2a9cSMiao Xie INIT_LIST_HEAD(&root->ordered_root); 11872ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[0]); 11882ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[1]); 1189d68fc57bSYan, Zheng spin_lock_init(&root->orphan_lock); 11905d4f98a2SYan Zheng spin_lock_init(&root->inode_lock); 1191eb73c1b7SMiao Xie spin_lock_init(&root->delalloc_lock); 1192199c2a9cSMiao Xie spin_lock_init(&root->ordered_extent_lock); 1193f0486c68SYan, Zheng spin_lock_init(&root->accounting_lock); 11942ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[0]); 11952ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[1]); 1196a2135011SChris Mason mutex_init(&root->objectid_mutex); 1197e02119d5SChris Mason mutex_init(&root->log_mutex); 11987237f183SYan Zheng init_waitqueue_head(&root->log_writer_wait); 11997237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[0]); 12007237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[1]); 12017237f183SYan Zheng atomic_set(&root->log_commit[0], 0); 12027237f183SYan Zheng atomic_set(&root->log_commit[1], 0); 12037237f183SYan Zheng atomic_set(&root->log_writers, 0); 12042ecb7923SMiao Xie atomic_set(&root->log_batch, 0); 12058a35d95fSJosef Bacik atomic_set(&root->orphan_inodes, 0); 1206b0feb9d9SMiao Xie atomic_set(&root->refs, 1); 12077237f183SYan Zheng root->log_transid = 0; 1208257c62e1SChris Mason root->last_log_commit = 0; 120906ea65a3SJosef Bacik if (fs_info) 1210d0c803c4SChris Mason extent_io_tree_init(&root->dirty_log_pages, 1211f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 1212017e5369SChris Mason 12133768f368SChris Mason memset(&root->root_key, 0, sizeof(root->root_key)); 12143768f368SChris Mason memset(&root->root_item, 0, sizeof(root->root_item)); 12156702ed49SChris Mason memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); 121658176a96SJosef Bacik memset(&root->root_kobj, 0, sizeof(root->root_kobj)); 121706ea65a3SJosef Bacik if (fs_info) 12183f157a2fSChris Mason root->defrag_trans_start = fs_info->generation; 121906ea65a3SJosef Bacik else 122006ea65a3SJosef Bacik root->defrag_trans_start = 0; 122158176a96SJosef Bacik init_completion(&root->kobj_unregister); 12226702ed49SChris Mason root->defrag_running = 0; 12234d775673SChris Mason root->root_key.objectid = objectid; 12240ee5dc67SAl Viro root->anon_dev = 0; 12258ea05e3aSAlexander Block 12265f3ab90aSAnand Jain spin_lock_init(&root->root_item_lock); 12273768f368SChris Mason } 12283768f368SChris Mason 1229f84a8bd6SAl Viro static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info) 12306f07e42eSAl Viro { 12316f07e42eSAl Viro struct btrfs_root *root = kzalloc(sizeof(*root), GFP_NOFS); 12326f07e42eSAl Viro if (root) 12336f07e42eSAl Viro root->fs_info = fs_info; 12346f07e42eSAl Viro return root; 12356f07e42eSAl Viro } 12366f07e42eSAl Viro 123706ea65a3SJosef Bacik #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 123806ea65a3SJosef Bacik /* Should only be used by the testing infrastructure */ 123906ea65a3SJosef Bacik struct btrfs_root *btrfs_alloc_dummy_root(void) 124006ea65a3SJosef Bacik { 124106ea65a3SJosef Bacik struct btrfs_root *root; 124206ea65a3SJosef Bacik 124306ea65a3SJosef Bacik root = btrfs_alloc_root(NULL); 124406ea65a3SJosef Bacik if (!root) 124506ea65a3SJosef Bacik return ERR_PTR(-ENOMEM); 124606ea65a3SJosef Bacik __setup_root(4096, 4096, 4096, 4096, root, NULL, 1); 124706ea65a3SJosef Bacik root->dummy_root = 1; 124806ea65a3SJosef Bacik 124906ea65a3SJosef Bacik return root; 125006ea65a3SJosef Bacik } 125106ea65a3SJosef Bacik #endif 125206ea65a3SJosef Bacik 125320897f5cSArne Jansen struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, 125420897f5cSArne Jansen struct btrfs_fs_info *fs_info, 125520897f5cSArne Jansen u64 objectid) 125620897f5cSArne Jansen { 125720897f5cSArne Jansen struct extent_buffer *leaf; 125820897f5cSArne Jansen struct btrfs_root *tree_root = fs_info->tree_root; 125920897f5cSArne Jansen struct btrfs_root *root; 126020897f5cSArne Jansen struct btrfs_key key; 126120897f5cSArne Jansen int ret = 0; 12626463fe58SStefan Behrens uuid_le uuid; 126320897f5cSArne Jansen 126420897f5cSArne Jansen root = btrfs_alloc_root(fs_info); 126520897f5cSArne Jansen if (!root) 126620897f5cSArne Jansen return ERR_PTR(-ENOMEM); 126720897f5cSArne Jansen 126820897f5cSArne Jansen __setup_root(tree_root->nodesize, tree_root->leafsize, 126920897f5cSArne Jansen tree_root->sectorsize, tree_root->stripesize, 127020897f5cSArne Jansen root, fs_info, objectid); 127120897f5cSArne Jansen root->root_key.objectid = objectid; 127220897f5cSArne Jansen root->root_key.type = BTRFS_ROOT_ITEM_KEY; 127320897f5cSArne Jansen root->root_key.offset = 0; 127420897f5cSArne Jansen 127520897f5cSArne Jansen leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 127620897f5cSArne Jansen 0, objectid, NULL, 0, 0, 0); 127720897f5cSArne Jansen if (IS_ERR(leaf)) { 127820897f5cSArne Jansen ret = PTR_ERR(leaf); 12791dd05682STsutomu Itoh leaf = NULL; 128020897f5cSArne Jansen goto fail; 128120897f5cSArne Jansen } 128220897f5cSArne Jansen 128320897f5cSArne Jansen memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 128420897f5cSArne Jansen btrfs_set_header_bytenr(leaf, leaf->start); 128520897f5cSArne Jansen btrfs_set_header_generation(leaf, trans->transid); 128620897f5cSArne Jansen btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 128720897f5cSArne Jansen btrfs_set_header_owner(leaf, objectid); 128820897f5cSArne Jansen root->node = leaf; 128920897f5cSArne Jansen 12900a4e5586SRoss Kirk write_extent_buffer(leaf, fs_info->fsid, btrfs_header_fsid(), 129120897f5cSArne Jansen BTRFS_FSID_SIZE); 129220897f5cSArne Jansen write_extent_buffer(leaf, fs_info->chunk_tree_uuid, 1293b308bc2fSGeert Uytterhoeven btrfs_header_chunk_tree_uuid(leaf), 129420897f5cSArne Jansen BTRFS_UUID_SIZE); 129520897f5cSArne Jansen btrfs_mark_buffer_dirty(leaf); 129620897f5cSArne Jansen 129720897f5cSArne Jansen root->commit_root = btrfs_root_node(root); 129820897f5cSArne Jansen root->track_dirty = 1; 129920897f5cSArne Jansen 130020897f5cSArne Jansen 130120897f5cSArne Jansen root->root_item.flags = 0; 130220897f5cSArne Jansen root->root_item.byte_limit = 0; 130320897f5cSArne Jansen btrfs_set_root_bytenr(&root->root_item, leaf->start); 130420897f5cSArne Jansen btrfs_set_root_generation(&root->root_item, trans->transid); 130520897f5cSArne Jansen btrfs_set_root_level(&root->root_item, 0); 130620897f5cSArne Jansen btrfs_set_root_refs(&root->root_item, 1); 130720897f5cSArne Jansen btrfs_set_root_used(&root->root_item, leaf->len); 130820897f5cSArne Jansen btrfs_set_root_last_snapshot(&root->root_item, 0); 130920897f5cSArne Jansen btrfs_set_root_dirid(&root->root_item, 0); 13106463fe58SStefan Behrens uuid_le_gen(&uuid); 13116463fe58SStefan Behrens memcpy(root->root_item.uuid, uuid.b, BTRFS_UUID_SIZE); 131220897f5cSArne Jansen root->root_item.drop_level = 0; 131320897f5cSArne Jansen 131420897f5cSArne Jansen key.objectid = objectid; 131520897f5cSArne Jansen key.type = BTRFS_ROOT_ITEM_KEY; 131620897f5cSArne Jansen key.offset = 0; 131720897f5cSArne Jansen ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); 131820897f5cSArne Jansen if (ret) 131920897f5cSArne Jansen goto fail; 132020897f5cSArne Jansen 132120897f5cSArne Jansen btrfs_tree_unlock(leaf); 132220897f5cSArne Jansen 132320897f5cSArne Jansen return root; 13241dd05682STsutomu Itoh 13251dd05682STsutomu Itoh fail: 13261dd05682STsutomu Itoh if (leaf) { 13271dd05682STsutomu Itoh btrfs_tree_unlock(leaf); 13281dd05682STsutomu Itoh free_extent_buffer(leaf); 13291dd05682STsutomu Itoh } 13301dd05682STsutomu Itoh kfree(root); 13311dd05682STsutomu Itoh 13321dd05682STsutomu Itoh return ERR_PTR(ret); 133320897f5cSArne Jansen } 133420897f5cSArne Jansen 13357237f183SYan Zheng static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, 1336e02119d5SChris Mason struct btrfs_fs_info *fs_info) 13370f7d52f4SChris Mason { 13380f7d52f4SChris Mason struct btrfs_root *root; 13390f7d52f4SChris Mason struct btrfs_root *tree_root = fs_info->tree_root; 13407237f183SYan Zheng struct extent_buffer *leaf; 1341e02119d5SChris Mason 13426f07e42eSAl Viro root = btrfs_alloc_root(fs_info); 1343e02119d5SChris Mason if (!root) 13447237f183SYan Zheng return ERR_PTR(-ENOMEM); 1345e02119d5SChris Mason 1346e02119d5SChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 1347e02119d5SChris Mason tree_root->sectorsize, tree_root->stripesize, 1348e02119d5SChris Mason root, fs_info, BTRFS_TREE_LOG_OBJECTID); 1349e02119d5SChris Mason 1350e02119d5SChris Mason root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 1351e02119d5SChris Mason root->root_key.type = BTRFS_ROOT_ITEM_KEY; 1352e02119d5SChris Mason root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 13537237f183SYan Zheng /* 13547237f183SYan Zheng * log trees do not get reference counted because they go away 13557237f183SYan Zheng * before a real commit is actually done. They do store pointers 13567237f183SYan Zheng * to file data extents, and those reference counts still get 13577237f183SYan Zheng * updated (along with back refs to the log tree). 13587237f183SYan Zheng */ 1359e02119d5SChris Mason root->ref_cows = 0; 1360e02119d5SChris Mason 13615d4f98a2SYan Zheng leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, 136266d7e7f0SArne Jansen BTRFS_TREE_LOG_OBJECTID, NULL, 13635581a51aSJan Schmidt 0, 0, 0); 13647237f183SYan Zheng if (IS_ERR(leaf)) { 13657237f183SYan Zheng kfree(root); 13667237f183SYan Zheng return ERR_CAST(leaf); 13677237f183SYan Zheng } 1368e02119d5SChris Mason 13695d4f98a2SYan Zheng memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 13705d4f98a2SYan Zheng btrfs_set_header_bytenr(leaf, leaf->start); 13715d4f98a2SYan Zheng btrfs_set_header_generation(leaf, trans->transid); 13725d4f98a2SYan Zheng btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 13735d4f98a2SYan Zheng btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); 13747237f183SYan Zheng root->node = leaf; 1375e02119d5SChris Mason 1376e02119d5SChris Mason write_extent_buffer(root->node, root->fs_info->fsid, 13770a4e5586SRoss Kirk btrfs_header_fsid(), BTRFS_FSID_SIZE); 1378e02119d5SChris Mason btrfs_mark_buffer_dirty(root->node); 1379e02119d5SChris Mason btrfs_tree_unlock(root->node); 13807237f183SYan Zheng return root; 13817237f183SYan Zheng } 13827237f183SYan Zheng 13837237f183SYan Zheng int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 13847237f183SYan Zheng struct btrfs_fs_info *fs_info) 13857237f183SYan Zheng { 13867237f183SYan Zheng struct btrfs_root *log_root; 13877237f183SYan Zheng 13887237f183SYan Zheng log_root = alloc_log_tree(trans, fs_info); 13897237f183SYan Zheng if (IS_ERR(log_root)) 13907237f183SYan Zheng return PTR_ERR(log_root); 13917237f183SYan Zheng WARN_ON(fs_info->log_root_tree); 13927237f183SYan Zheng fs_info->log_root_tree = log_root; 13937237f183SYan Zheng return 0; 13947237f183SYan Zheng } 13957237f183SYan Zheng 13967237f183SYan Zheng int btrfs_add_log_tree(struct btrfs_trans_handle *trans, 13977237f183SYan Zheng struct btrfs_root *root) 13987237f183SYan Zheng { 13997237f183SYan Zheng struct btrfs_root *log_root; 14007237f183SYan Zheng struct btrfs_inode_item *inode_item; 14017237f183SYan Zheng 14027237f183SYan Zheng log_root = alloc_log_tree(trans, root->fs_info); 14037237f183SYan Zheng if (IS_ERR(log_root)) 14047237f183SYan Zheng return PTR_ERR(log_root); 14057237f183SYan Zheng 14067237f183SYan Zheng log_root->last_trans = trans->transid; 14077237f183SYan Zheng log_root->root_key.offset = root->root_key.objectid; 14087237f183SYan Zheng 14097237f183SYan Zheng inode_item = &log_root->root_item.inode; 14103cae210fSQu Wenruo btrfs_set_stack_inode_generation(inode_item, 1); 14113cae210fSQu Wenruo btrfs_set_stack_inode_size(inode_item, 3); 14123cae210fSQu Wenruo btrfs_set_stack_inode_nlink(inode_item, 1); 14133cae210fSQu Wenruo btrfs_set_stack_inode_nbytes(inode_item, root->leafsize); 14143cae210fSQu Wenruo btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755); 14157237f183SYan Zheng 14165d4f98a2SYan Zheng btrfs_set_root_node(&log_root->root_item, log_root->node); 14177237f183SYan Zheng 14187237f183SYan Zheng WARN_ON(root->log_root); 14197237f183SYan Zheng root->log_root = log_root; 14207237f183SYan Zheng root->log_transid = 0; 1421257c62e1SChris Mason root->last_log_commit = 0; 1422e02119d5SChris Mason return 0; 1423e02119d5SChris Mason } 1424e02119d5SChris Mason 142535a3621bSStefan Behrens static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, 1426cb517eabSMiao Xie struct btrfs_key *key) 1427e02119d5SChris Mason { 1428e02119d5SChris Mason struct btrfs_root *root; 1429e02119d5SChris Mason struct btrfs_fs_info *fs_info = tree_root->fs_info; 14300f7d52f4SChris Mason struct btrfs_path *path; 143184234f3aSYan Zheng u64 generation; 1432db94535dSChris Mason u32 blocksize; 1433cb517eabSMiao Xie int ret; 1434cb517eabSMiao Xie 1435cb517eabSMiao Xie path = btrfs_alloc_path(); 1436cb517eabSMiao Xie if (!path) 1437cb517eabSMiao Xie return ERR_PTR(-ENOMEM); 14380f7d52f4SChris Mason 14396f07e42eSAl Viro root = btrfs_alloc_root(fs_info); 1440cb517eabSMiao Xie if (!root) { 1441cb517eabSMiao Xie ret = -ENOMEM; 1442cb517eabSMiao Xie goto alloc_fail; 14430f7d52f4SChris Mason } 14440f7d52f4SChris Mason 1445db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 144687ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 1447cb517eabSMiao Xie root, fs_info, key->objectid); 14480f7d52f4SChris Mason 1449cb517eabSMiao Xie ret = btrfs_find_root(tree_root, key, path, 1450cb517eabSMiao Xie &root->root_item, &root->root_key); 14510f7d52f4SChris Mason if (ret) { 145213a8a7c8SYan, Zheng if (ret > 0) 145313a8a7c8SYan, Zheng ret = -ENOENT; 1454cb517eabSMiao Xie goto find_fail; 14550f7d52f4SChris Mason } 145613a8a7c8SYan, Zheng 145784234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1458db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1459db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 146084234f3aSYan Zheng blocksize, generation); 1461cb517eabSMiao Xie if (!root->node) { 1462cb517eabSMiao Xie ret = -ENOMEM; 1463cb517eabSMiao Xie goto find_fail; 1464cb517eabSMiao Xie } else if (!btrfs_buffer_uptodate(root->node, generation, 0)) { 1465cb517eabSMiao Xie ret = -EIO; 1466cb517eabSMiao Xie goto read_fail; 1467416bc658SJosef Bacik } 14685d4f98a2SYan Zheng root->commit_root = btrfs_root_node(root); 146913a8a7c8SYan, Zheng out: 1470cb517eabSMiao Xie btrfs_free_path(path); 1471cb517eabSMiao Xie return root; 1472cb517eabSMiao Xie 1473cb517eabSMiao Xie read_fail: 1474cb517eabSMiao Xie free_extent_buffer(root->node); 1475cb517eabSMiao Xie find_fail: 1476cb517eabSMiao Xie kfree(root); 1477cb517eabSMiao Xie alloc_fail: 1478cb517eabSMiao Xie root = ERR_PTR(ret); 1479cb517eabSMiao Xie goto out; 1480cb517eabSMiao Xie } 1481cb517eabSMiao Xie 1482cb517eabSMiao Xie struct btrfs_root *btrfs_read_fs_root(struct btrfs_root *tree_root, 1483cb517eabSMiao Xie struct btrfs_key *location) 1484cb517eabSMiao Xie { 1485cb517eabSMiao Xie struct btrfs_root *root; 1486cb517eabSMiao Xie 1487cb517eabSMiao Xie root = btrfs_read_tree_root(tree_root, location); 1488cb517eabSMiao Xie if (IS_ERR(root)) 1489cb517eabSMiao Xie return root; 1490cb517eabSMiao Xie 1491cb517eabSMiao Xie if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) { 14920f7d52f4SChris Mason root->ref_cows = 1; 149308fe4db1SLi Zefan btrfs_check_and_init_root_item(&root->root_item); 149408fe4db1SLi Zefan } 149513a8a7c8SYan, Zheng 14965eda7b5eSChris Mason return root; 14975eda7b5eSChris Mason } 14985eda7b5eSChris Mason 1499cb517eabSMiao Xie int btrfs_init_fs_root(struct btrfs_root *root) 1500cb517eabSMiao Xie { 1501cb517eabSMiao Xie int ret; 1502cb517eabSMiao Xie 1503cb517eabSMiao Xie root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); 1504cb517eabSMiao Xie root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), 1505cb517eabSMiao Xie GFP_NOFS); 1506cb517eabSMiao Xie if (!root->free_ino_pinned || !root->free_ino_ctl) { 1507cb517eabSMiao Xie ret = -ENOMEM; 1508cb517eabSMiao Xie goto fail; 1509cb517eabSMiao Xie } 1510cb517eabSMiao Xie 1511cb517eabSMiao Xie btrfs_init_free_ino_ctl(root); 1512cb517eabSMiao Xie mutex_init(&root->fs_commit_mutex); 1513cb517eabSMiao Xie spin_lock_init(&root->cache_lock); 1514cb517eabSMiao Xie init_waitqueue_head(&root->cache_wait); 1515cb517eabSMiao Xie 1516cb517eabSMiao Xie ret = get_anon_bdev(&root->anon_dev); 1517cb517eabSMiao Xie if (ret) 1518cb517eabSMiao Xie goto fail; 1519cb517eabSMiao Xie return 0; 1520cb517eabSMiao Xie fail: 1521cb517eabSMiao Xie kfree(root->free_ino_ctl); 1522cb517eabSMiao Xie kfree(root->free_ino_pinned); 1523cb517eabSMiao Xie return ret; 1524cb517eabSMiao Xie } 1525cb517eabSMiao Xie 1526171170c1SSergei Trofimovich static struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, 1527cb517eabSMiao Xie u64 root_id) 1528cb517eabSMiao Xie { 1529cb517eabSMiao Xie struct btrfs_root *root; 1530cb517eabSMiao Xie 1531cb517eabSMiao Xie spin_lock(&fs_info->fs_roots_radix_lock); 1532cb517eabSMiao Xie root = radix_tree_lookup(&fs_info->fs_roots_radix, 1533cb517eabSMiao Xie (unsigned long)root_id); 1534cb517eabSMiao Xie spin_unlock(&fs_info->fs_roots_radix_lock); 1535cb517eabSMiao Xie return root; 1536cb517eabSMiao Xie } 1537cb517eabSMiao Xie 1538cb517eabSMiao Xie int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, 1539cb517eabSMiao Xie struct btrfs_root *root) 1540cb517eabSMiao Xie { 1541cb517eabSMiao Xie int ret; 1542cb517eabSMiao Xie 1543cb517eabSMiao Xie ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); 1544cb517eabSMiao Xie if (ret) 1545cb517eabSMiao Xie return ret; 1546cb517eabSMiao Xie 1547cb517eabSMiao Xie spin_lock(&fs_info->fs_roots_radix_lock); 1548cb517eabSMiao Xie ret = radix_tree_insert(&fs_info->fs_roots_radix, 1549cb517eabSMiao Xie (unsigned long)root->root_key.objectid, 1550cb517eabSMiao Xie root); 1551cb517eabSMiao Xie if (ret == 0) 1552cb517eabSMiao Xie root->in_radix = 1; 1553cb517eabSMiao Xie spin_unlock(&fs_info->fs_roots_radix_lock); 1554cb517eabSMiao Xie radix_tree_preload_end(); 1555cb517eabSMiao Xie 1556cb517eabSMiao Xie return ret; 1557cb517eabSMiao Xie } 1558cb517eabSMiao Xie 1559c00869f1SMiao Xie struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, 1560c00869f1SMiao Xie struct btrfs_key *location, 1561c00869f1SMiao Xie bool check_ref) 15625eda7b5eSChris Mason { 15635eda7b5eSChris Mason struct btrfs_root *root; 15645eda7b5eSChris Mason int ret; 15655eda7b5eSChris Mason 1566edbd8d4eSChris Mason if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) 1567edbd8d4eSChris Mason return fs_info->tree_root; 1568edbd8d4eSChris Mason if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) 1569edbd8d4eSChris Mason return fs_info->extent_root; 15708f18cf13SChris Mason if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) 15718f18cf13SChris Mason return fs_info->chunk_root; 15728f18cf13SChris Mason if (location->objectid == BTRFS_DEV_TREE_OBJECTID) 15738f18cf13SChris Mason return fs_info->dev_root; 15740403e47eSYan Zheng if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) 15750403e47eSYan Zheng return fs_info->csum_root; 1576bcef60f2SArne Jansen if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) 1577bcef60f2SArne Jansen return fs_info->quota_root ? fs_info->quota_root : 1578bcef60f2SArne Jansen ERR_PTR(-ENOENT); 1579f7a81ea4SStefan Behrens if (location->objectid == BTRFS_UUID_TREE_OBJECTID) 1580f7a81ea4SStefan Behrens return fs_info->uuid_root ? fs_info->uuid_root : 1581f7a81ea4SStefan Behrens ERR_PTR(-ENOENT); 15824df27c4dSYan, Zheng again: 1583cb517eabSMiao Xie root = btrfs_lookup_fs_root(fs_info, location->objectid); 158448475471SStefan Behrens if (root) { 1585c00869f1SMiao Xie if (check_ref && btrfs_root_refs(&root->root_item) == 0) 158648475471SStefan Behrens return ERR_PTR(-ENOENT); 15875eda7b5eSChris Mason return root; 158848475471SStefan Behrens } 15895eda7b5eSChris Mason 1590cb517eabSMiao Xie root = btrfs_read_fs_root(fs_info->tree_root, location); 15915eda7b5eSChris Mason if (IS_ERR(root)) 15925eda7b5eSChris Mason return root; 15933394e160SChris Mason 1594c00869f1SMiao Xie if (check_ref && btrfs_root_refs(&root->root_item) == 0) { 1595d68fc57bSYan, Zheng ret = -ENOENT; 1596d68fc57bSYan, Zheng goto fail; 1597d68fc57bSYan, Zheng } 1598d68fc57bSYan, Zheng 1599cb517eabSMiao Xie ret = btrfs_init_fs_root(root); 1600cb517eabSMiao Xie if (ret) 1601cb517eabSMiao Xie goto fail; 1602cb517eabSMiao Xie 16033f870c28SKelley Nielsen ret = btrfs_find_item(fs_info->tree_root, NULL, BTRFS_ORPHAN_OBJECTID, 16043f870c28SKelley Nielsen location->objectid, BTRFS_ORPHAN_ITEM_KEY, NULL); 1605d68fc57bSYan, Zheng if (ret < 0) 1606d68fc57bSYan, Zheng goto fail; 1607d68fc57bSYan, Zheng if (ret == 0) 1608d68fc57bSYan, Zheng root->orphan_item_inserted = 1; 1609d68fc57bSYan, Zheng 1610cb517eabSMiao Xie ret = btrfs_insert_fs_root(fs_info, root); 16110f7d52f4SChris Mason if (ret) { 16124df27c4dSYan, Zheng if (ret == -EEXIST) { 16134df27c4dSYan, Zheng free_fs_root(root); 16144df27c4dSYan, Zheng goto again; 16150f7d52f4SChris Mason } 16164df27c4dSYan, Zheng goto fail; 16174df27c4dSYan, Zheng } 1618edbd8d4eSChris Mason return root; 16194df27c4dSYan, Zheng fail: 16204df27c4dSYan, Zheng free_fs_root(root); 16214df27c4dSYan, Zheng return ERR_PTR(ret); 1622edbd8d4eSChris Mason } 1623edbd8d4eSChris Mason 162404160088SChris Mason static int btrfs_congested_fn(void *congested_data, int bdi_bits) 162504160088SChris Mason { 162604160088SChris Mason struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; 162704160088SChris Mason int ret = 0; 162804160088SChris Mason struct btrfs_device *device; 162904160088SChris Mason struct backing_dev_info *bdi; 1630b7967db7SChris Mason 16311f78160cSXiao Guangrong rcu_read_lock(); 16321f78160cSXiao Guangrong list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { 1633dfe25020SChris Mason if (!device->bdev) 1634dfe25020SChris Mason continue; 163504160088SChris Mason bdi = blk_get_backing_dev_info(device->bdev); 163604160088SChris Mason if (bdi && bdi_congested(bdi, bdi_bits)) { 163704160088SChris Mason ret = 1; 163804160088SChris Mason break; 163904160088SChris Mason } 164004160088SChris Mason } 16411f78160cSXiao Guangrong rcu_read_unlock(); 164204160088SChris Mason return ret; 164304160088SChris Mason } 164404160088SChris Mason 164538b66988SChris Mason /* 1646ad081f14SJens Axboe * If this fails, caller must call bdi_destroy() to get rid of the 1647ad081f14SJens Axboe * bdi again. 1648ad081f14SJens Axboe */ 164904160088SChris Mason static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) 165004160088SChris Mason { 1651ad081f14SJens Axboe int err; 1652ad081f14SJens Axboe 1653ad081f14SJens Axboe bdi->capabilities = BDI_CAP_MAP_COPY; 1654e6d086d8SJens Axboe err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY); 1655ad081f14SJens Axboe if (err) 1656ad081f14SJens Axboe return err; 1657ad081f14SJens Axboe 16584575c9ccSChris Mason bdi->ra_pages = default_backing_dev_info.ra_pages; 165904160088SChris Mason bdi->congested_fn = btrfs_congested_fn; 166004160088SChris Mason bdi->congested_data = info; 166104160088SChris Mason return 0; 166204160088SChris Mason } 166304160088SChris Mason 16648b712842SChris Mason /* 16658b712842SChris Mason * called by the kthread helper functions to finally call the bio end_io 16668b712842SChris Mason * functions. This is where read checksum verification actually happens 16678b712842SChris Mason */ 16688b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work) 1669ce9adaa5SChris Mason { 1670ce9adaa5SChris Mason struct bio *bio; 16718b712842SChris Mason struct end_io_wq *end_io_wq; 1672ce9adaa5SChris Mason int error; 1673ce9adaa5SChris Mason 16748b712842SChris Mason end_io_wq = container_of(work, struct end_io_wq, work); 1675ce9adaa5SChris Mason bio = end_io_wq->bio; 16768b712842SChris Mason 1677ce9adaa5SChris Mason error = end_io_wq->error; 1678ce9adaa5SChris Mason bio->bi_private = end_io_wq->private; 1679ce9adaa5SChris Mason bio->bi_end_io = end_io_wq->end_io; 1680ce9adaa5SChris Mason kfree(end_io_wq); 1681ce9adaa5SChris Mason bio_endio(bio, error); 1682ce9adaa5SChris Mason } 168344b8bd7eSChris Mason 1684a74a4b97SChris Mason static int cleaner_kthread(void *arg) 1685a74a4b97SChris Mason { 1686a74a4b97SChris Mason struct btrfs_root *root = arg; 1687d0278245SMiao Xie int again; 1688a74a4b97SChris Mason 1689a74a4b97SChris Mason do { 1690d0278245SMiao Xie again = 0; 16919d1a2a3aSDavid Sterba 1692d0278245SMiao Xie /* Make the cleaner go to sleep early. */ 1693babbf170SMiao Xie if (btrfs_need_cleaner_sleep(root)) 1694d0278245SMiao Xie goto sleep; 1695d0278245SMiao Xie 1696d0278245SMiao Xie if (!mutex_trylock(&root->fs_info->cleaner_mutex)) 1697d0278245SMiao Xie goto sleep; 1698d0278245SMiao Xie 1699dc7f370cSMiao Xie /* 1700dc7f370cSMiao Xie * Avoid the problem that we change the status of the fs 1701dc7f370cSMiao Xie * during the above check and trylock. 1702dc7f370cSMiao Xie */ 1703babbf170SMiao Xie if (btrfs_need_cleaner_sleep(root)) { 1704dc7f370cSMiao Xie mutex_unlock(&root->fs_info->cleaner_mutex); 1705dc7f370cSMiao Xie goto sleep; 1706dc7f370cSMiao Xie } 1707dc7f370cSMiao Xie 170824bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 17099d1a2a3aSDavid Sterba again = btrfs_clean_one_deleted_snapshot(root); 1710a74a4b97SChris Mason mutex_unlock(&root->fs_info->cleaner_mutex); 1711a74a4b97SChris Mason 1712d0278245SMiao Xie /* 171305323cd1SMiao Xie * The defragger has dealt with the R/O remount and umount, 171405323cd1SMiao Xie * needn't do anything special here. 1715d0278245SMiao Xie */ 1716d0278245SMiao Xie btrfs_run_defrag_inodes(root->fs_info); 1717d0278245SMiao Xie sleep: 17189d1a2a3aSDavid Sterba if (!try_to_freeze() && !again) { 1719a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 17208929ecfaSYan, Zheng if (!kthread_should_stop()) 1721a74a4b97SChris Mason schedule(); 1722a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1723a74a4b97SChris Mason } 1724a74a4b97SChris Mason } while (!kthread_should_stop()); 1725a74a4b97SChris Mason return 0; 1726a74a4b97SChris Mason } 1727a74a4b97SChris Mason 1728a74a4b97SChris Mason static int transaction_kthread(void *arg) 1729a74a4b97SChris Mason { 1730a74a4b97SChris Mason struct btrfs_root *root = arg; 1731a74a4b97SChris Mason struct btrfs_trans_handle *trans; 1732a74a4b97SChris Mason struct btrfs_transaction *cur; 17338929ecfaSYan, Zheng u64 transid; 1734a74a4b97SChris Mason unsigned long now; 1735a74a4b97SChris Mason unsigned long delay; 1736914b2007SJan Kara bool cannot_commit; 1737a74a4b97SChris Mason 1738a74a4b97SChris Mason do { 1739914b2007SJan Kara cannot_commit = false; 17408b87dc17SDavid Sterba delay = HZ * root->fs_info->commit_interval; 1741a74a4b97SChris Mason mutex_lock(&root->fs_info->transaction_kthread_mutex); 1742a74a4b97SChris Mason 1743a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 1744a74a4b97SChris Mason cur = root->fs_info->running_transaction; 1745a74a4b97SChris Mason if (!cur) { 1746a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1747a74a4b97SChris Mason goto sleep; 1748a74a4b97SChris Mason } 174931153d81SYan Zheng 1750a74a4b97SChris Mason now = get_seconds(); 17514a9d8bdeSMiao Xie if (cur->state < TRANS_STATE_BLOCKED && 17528b87dc17SDavid Sterba (now < cur->start_time || 17538b87dc17SDavid Sterba now - cur->start_time < root->fs_info->commit_interval)) { 1754a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1755a74a4b97SChris Mason delay = HZ * 5; 1756a74a4b97SChris Mason goto sleep; 1757a74a4b97SChris Mason } 17588929ecfaSYan, Zheng transid = cur->transid; 1759a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 176056bec294SChris Mason 176179787eaaSJeff Mahoney /* If the file system is aborted, this will always fail. */ 1762354aa0fbSMiao Xie trans = btrfs_attach_transaction(root); 1763914b2007SJan Kara if (IS_ERR(trans)) { 1764354aa0fbSMiao Xie if (PTR_ERR(trans) != -ENOENT) 1765914b2007SJan Kara cannot_commit = true; 176679787eaaSJeff Mahoney goto sleep; 1767914b2007SJan Kara } 17688929ecfaSYan, Zheng if (transid == trans->transid) { 176979787eaaSJeff Mahoney btrfs_commit_transaction(trans, root); 17708929ecfaSYan, Zheng } else { 17718929ecfaSYan, Zheng btrfs_end_transaction(trans, root); 17728929ecfaSYan, Zheng } 1773a74a4b97SChris Mason sleep: 1774a74a4b97SChris Mason wake_up_process(root->fs_info->cleaner_kthread); 1775a74a4b97SChris Mason mutex_unlock(&root->fs_info->transaction_kthread_mutex); 1776a74a4b97SChris Mason 17774e121c06SJosef Bacik if (unlikely(test_bit(BTRFS_FS_STATE_ERROR, 17784e121c06SJosef Bacik &root->fs_info->fs_state))) 17794e121c06SJosef Bacik btrfs_cleanup_transaction(root); 1780a0acae0eSTejun Heo if (!try_to_freeze()) { 1781a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 17828929ecfaSYan, Zheng if (!kthread_should_stop() && 1783914b2007SJan Kara (!btrfs_transaction_blocked(root->fs_info) || 1784914b2007SJan Kara cannot_commit)) 1785a74a4b97SChris Mason schedule_timeout(delay); 1786a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1787a74a4b97SChris Mason } 1788a74a4b97SChris Mason } while (!kthread_should_stop()); 1789a74a4b97SChris Mason return 0; 1790a74a4b97SChris Mason } 1791a74a4b97SChris Mason 1792af31f5e5SChris Mason /* 1793af31f5e5SChris Mason * this will find the highest generation in the array of 1794af31f5e5SChris Mason * root backups. The index of the highest array is returned, 1795af31f5e5SChris Mason * or -1 if we can't find anything. 1796af31f5e5SChris Mason * 1797af31f5e5SChris Mason * We check to make sure the array is valid by comparing the 1798af31f5e5SChris Mason * generation of the latest root in the array with the generation 1799af31f5e5SChris Mason * in the super block. If they don't match we pitch it. 1800af31f5e5SChris Mason */ 1801af31f5e5SChris Mason static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) 1802af31f5e5SChris Mason { 1803af31f5e5SChris Mason u64 cur; 1804af31f5e5SChris Mason int newest_index = -1; 1805af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1806af31f5e5SChris Mason int i; 1807af31f5e5SChris Mason 1808af31f5e5SChris Mason for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 1809af31f5e5SChris Mason root_backup = info->super_copy->super_roots + i; 1810af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1811af31f5e5SChris Mason if (cur == newest_gen) 1812af31f5e5SChris Mason newest_index = i; 1813af31f5e5SChris Mason } 1814af31f5e5SChris Mason 1815af31f5e5SChris Mason /* check to see if we actually wrapped around */ 1816af31f5e5SChris Mason if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { 1817af31f5e5SChris Mason root_backup = info->super_copy->super_roots; 1818af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1819af31f5e5SChris Mason if (cur == newest_gen) 1820af31f5e5SChris Mason newest_index = 0; 1821af31f5e5SChris Mason } 1822af31f5e5SChris Mason return newest_index; 1823af31f5e5SChris Mason } 1824af31f5e5SChris Mason 1825af31f5e5SChris Mason 1826af31f5e5SChris Mason /* 1827af31f5e5SChris Mason * find the oldest backup so we know where to store new entries 1828af31f5e5SChris Mason * in the backup array. This will set the backup_root_index 1829af31f5e5SChris Mason * field in the fs_info struct 1830af31f5e5SChris Mason */ 1831af31f5e5SChris Mason static void find_oldest_super_backup(struct btrfs_fs_info *info, 1832af31f5e5SChris Mason u64 newest_gen) 1833af31f5e5SChris Mason { 1834af31f5e5SChris Mason int newest_index = -1; 1835af31f5e5SChris Mason 1836af31f5e5SChris Mason newest_index = find_newest_super_backup(info, newest_gen); 1837af31f5e5SChris Mason /* if there was garbage in there, just move along */ 1838af31f5e5SChris Mason if (newest_index == -1) { 1839af31f5e5SChris Mason info->backup_root_index = 0; 1840af31f5e5SChris Mason } else { 1841af31f5e5SChris Mason info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; 1842af31f5e5SChris Mason } 1843af31f5e5SChris Mason } 1844af31f5e5SChris Mason 1845af31f5e5SChris Mason /* 1846af31f5e5SChris Mason * copy all the root pointers into the super backup array. 1847af31f5e5SChris Mason * this will bump the backup pointer by one when it is 1848af31f5e5SChris Mason * done 1849af31f5e5SChris Mason */ 1850af31f5e5SChris Mason static void backup_super_roots(struct btrfs_fs_info *info) 1851af31f5e5SChris Mason { 1852af31f5e5SChris Mason int next_backup; 1853af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1854af31f5e5SChris Mason int last_backup; 1855af31f5e5SChris Mason 1856af31f5e5SChris Mason next_backup = info->backup_root_index; 1857af31f5e5SChris Mason last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % 1858af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1859af31f5e5SChris Mason 1860af31f5e5SChris Mason /* 1861af31f5e5SChris Mason * just overwrite the last backup if we're at the same generation 1862af31f5e5SChris Mason * this happens only at umount 1863af31f5e5SChris Mason */ 1864af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + last_backup; 1865af31f5e5SChris Mason if (btrfs_backup_tree_root_gen(root_backup) == 1866af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)) 1867af31f5e5SChris Mason next_backup = last_backup; 1868af31f5e5SChris Mason 1869af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + next_backup; 1870af31f5e5SChris Mason 1871af31f5e5SChris Mason /* 1872af31f5e5SChris Mason * make sure all of our padding and empty slots get zero filled 1873af31f5e5SChris Mason * regardless of which ones we use today 1874af31f5e5SChris Mason */ 1875af31f5e5SChris Mason memset(root_backup, 0, sizeof(*root_backup)); 1876af31f5e5SChris Mason 1877af31f5e5SChris Mason info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; 1878af31f5e5SChris Mason 1879af31f5e5SChris Mason btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); 1880af31f5e5SChris Mason btrfs_set_backup_tree_root_gen(root_backup, 1881af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)); 1882af31f5e5SChris Mason 1883af31f5e5SChris Mason btrfs_set_backup_tree_root_level(root_backup, 1884af31f5e5SChris Mason btrfs_header_level(info->tree_root->node)); 1885af31f5e5SChris Mason 1886af31f5e5SChris Mason btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); 1887af31f5e5SChris Mason btrfs_set_backup_chunk_root_gen(root_backup, 1888af31f5e5SChris Mason btrfs_header_generation(info->chunk_root->node)); 1889af31f5e5SChris Mason btrfs_set_backup_chunk_root_level(root_backup, 1890af31f5e5SChris Mason btrfs_header_level(info->chunk_root->node)); 1891af31f5e5SChris Mason 1892af31f5e5SChris Mason btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); 1893af31f5e5SChris Mason btrfs_set_backup_extent_root_gen(root_backup, 1894af31f5e5SChris Mason btrfs_header_generation(info->extent_root->node)); 1895af31f5e5SChris Mason btrfs_set_backup_extent_root_level(root_backup, 1896af31f5e5SChris Mason btrfs_header_level(info->extent_root->node)); 1897af31f5e5SChris Mason 18987c7e82a7SChris Mason /* 18997c7e82a7SChris Mason * we might commit during log recovery, which happens before we set 19007c7e82a7SChris Mason * the fs_root. Make sure it is valid before we fill it in. 19017c7e82a7SChris Mason */ 19027c7e82a7SChris Mason if (info->fs_root && info->fs_root->node) { 19037c7e82a7SChris Mason btrfs_set_backup_fs_root(root_backup, 19047c7e82a7SChris Mason info->fs_root->node->start); 1905af31f5e5SChris Mason btrfs_set_backup_fs_root_gen(root_backup, 1906af31f5e5SChris Mason btrfs_header_generation(info->fs_root->node)); 1907af31f5e5SChris Mason btrfs_set_backup_fs_root_level(root_backup, 1908af31f5e5SChris Mason btrfs_header_level(info->fs_root->node)); 19097c7e82a7SChris Mason } 1910af31f5e5SChris Mason 1911af31f5e5SChris Mason btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); 1912af31f5e5SChris Mason btrfs_set_backup_dev_root_gen(root_backup, 1913af31f5e5SChris Mason btrfs_header_generation(info->dev_root->node)); 1914af31f5e5SChris Mason btrfs_set_backup_dev_root_level(root_backup, 1915af31f5e5SChris Mason btrfs_header_level(info->dev_root->node)); 1916af31f5e5SChris Mason 1917af31f5e5SChris Mason btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); 1918af31f5e5SChris Mason btrfs_set_backup_csum_root_gen(root_backup, 1919af31f5e5SChris Mason btrfs_header_generation(info->csum_root->node)); 1920af31f5e5SChris Mason btrfs_set_backup_csum_root_level(root_backup, 1921af31f5e5SChris Mason btrfs_header_level(info->csum_root->node)); 1922af31f5e5SChris Mason 1923af31f5e5SChris Mason btrfs_set_backup_total_bytes(root_backup, 1924af31f5e5SChris Mason btrfs_super_total_bytes(info->super_copy)); 1925af31f5e5SChris Mason btrfs_set_backup_bytes_used(root_backup, 1926af31f5e5SChris Mason btrfs_super_bytes_used(info->super_copy)); 1927af31f5e5SChris Mason btrfs_set_backup_num_devices(root_backup, 1928af31f5e5SChris Mason btrfs_super_num_devices(info->super_copy)); 1929af31f5e5SChris Mason 1930af31f5e5SChris Mason /* 1931af31f5e5SChris Mason * if we don't copy this out to the super_copy, it won't get remembered 1932af31f5e5SChris Mason * for the next commit 1933af31f5e5SChris Mason */ 1934af31f5e5SChris Mason memcpy(&info->super_copy->super_roots, 1935af31f5e5SChris Mason &info->super_for_commit->super_roots, 1936af31f5e5SChris Mason sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); 1937af31f5e5SChris Mason } 1938af31f5e5SChris Mason 1939af31f5e5SChris Mason /* 1940af31f5e5SChris Mason * this copies info out of the root backup array and back into 1941af31f5e5SChris Mason * the in-memory super block. It is meant to help iterate through 1942af31f5e5SChris Mason * the array, so you send it the number of backups you've already 1943af31f5e5SChris Mason * tried and the last backup index you used. 1944af31f5e5SChris Mason * 1945af31f5e5SChris Mason * this returns -1 when it has tried all the backups 1946af31f5e5SChris Mason */ 1947af31f5e5SChris Mason static noinline int next_root_backup(struct btrfs_fs_info *info, 1948af31f5e5SChris Mason struct btrfs_super_block *super, 1949af31f5e5SChris Mason int *num_backups_tried, int *backup_index) 1950af31f5e5SChris Mason { 1951af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1952af31f5e5SChris Mason int newest = *backup_index; 1953af31f5e5SChris Mason 1954af31f5e5SChris Mason if (*num_backups_tried == 0) { 1955af31f5e5SChris Mason u64 gen = btrfs_super_generation(super); 1956af31f5e5SChris Mason 1957af31f5e5SChris Mason newest = find_newest_super_backup(info, gen); 1958af31f5e5SChris Mason if (newest == -1) 1959af31f5e5SChris Mason return -1; 1960af31f5e5SChris Mason 1961af31f5e5SChris Mason *backup_index = newest; 1962af31f5e5SChris Mason *num_backups_tried = 1; 1963af31f5e5SChris Mason } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { 1964af31f5e5SChris Mason /* we've tried all the backups, all done */ 1965af31f5e5SChris Mason return -1; 1966af31f5e5SChris Mason } else { 1967af31f5e5SChris Mason /* jump to the next oldest backup */ 1968af31f5e5SChris Mason newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % 1969af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1970af31f5e5SChris Mason *backup_index = newest; 1971af31f5e5SChris Mason *num_backups_tried += 1; 1972af31f5e5SChris Mason } 1973af31f5e5SChris Mason root_backup = super->super_roots + newest; 1974af31f5e5SChris Mason 1975af31f5e5SChris Mason btrfs_set_super_generation(super, 1976af31f5e5SChris Mason btrfs_backup_tree_root_gen(root_backup)); 1977af31f5e5SChris Mason btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); 1978af31f5e5SChris Mason btrfs_set_super_root_level(super, 1979af31f5e5SChris Mason btrfs_backup_tree_root_level(root_backup)); 1980af31f5e5SChris Mason btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); 1981af31f5e5SChris Mason 1982af31f5e5SChris Mason /* 1983af31f5e5SChris Mason * fixme: the total bytes and num_devices need to match or we should 1984af31f5e5SChris Mason * need a fsck 1985af31f5e5SChris Mason */ 1986af31f5e5SChris Mason btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); 1987af31f5e5SChris Mason btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); 1988af31f5e5SChris Mason return 0; 1989af31f5e5SChris Mason } 1990af31f5e5SChris Mason 19917abadb64SLiu Bo /* helper to cleanup workers */ 19927abadb64SLiu Bo static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) 19937abadb64SLiu Bo { 19947abadb64SLiu Bo btrfs_stop_workers(&fs_info->generic_worker); 19957abadb64SLiu Bo btrfs_stop_workers(&fs_info->fixup_workers); 19967abadb64SLiu Bo btrfs_stop_workers(&fs_info->delalloc_workers); 19977abadb64SLiu Bo btrfs_stop_workers(&fs_info->workers); 19987abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_workers); 19997abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_meta_workers); 20007abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_raid56_workers); 20017abadb64SLiu Bo btrfs_stop_workers(&fs_info->rmw_workers); 20027abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_meta_write_workers); 20037abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_write_workers); 20047abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_freespace_worker); 20057abadb64SLiu Bo btrfs_stop_workers(&fs_info->submit_workers); 20067abadb64SLiu Bo btrfs_stop_workers(&fs_info->delayed_workers); 20077abadb64SLiu Bo btrfs_stop_workers(&fs_info->caching_workers); 20087abadb64SLiu Bo btrfs_stop_workers(&fs_info->readahead_workers); 20097abadb64SLiu Bo btrfs_stop_workers(&fs_info->flush_workers); 20102f232036SJan Schmidt btrfs_stop_workers(&fs_info->qgroup_rescan_workers); 20117abadb64SLiu Bo } 20127abadb64SLiu Bo 20132e9f5954SRashika static void free_root_extent_buffers(struct btrfs_root *root) 20142e9f5954SRashika { 20152e9f5954SRashika if (root) { 20162e9f5954SRashika free_extent_buffer(root->node); 20172e9f5954SRashika free_extent_buffer(root->commit_root); 20182e9f5954SRashika root->node = NULL; 20192e9f5954SRashika root->commit_root = NULL; 20202e9f5954SRashika } 20212e9f5954SRashika } 20222e9f5954SRashika 2023af31f5e5SChris Mason /* helper to cleanup tree roots */ 2024af31f5e5SChris Mason static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) 2025af31f5e5SChris Mason { 20262e9f5954SRashika free_root_extent_buffers(info->tree_root); 2027655b09feSJosef Bacik 20282e9f5954SRashika free_root_extent_buffers(info->dev_root); 20292e9f5954SRashika free_root_extent_buffers(info->extent_root); 20302e9f5954SRashika free_root_extent_buffers(info->csum_root); 20312e9f5954SRashika free_root_extent_buffers(info->quota_root); 20322e9f5954SRashika free_root_extent_buffers(info->uuid_root); 20332e9f5954SRashika if (chunk_root) 20342e9f5954SRashika free_root_extent_buffers(info->chunk_root); 2035af31f5e5SChris Mason } 2036af31f5e5SChris Mason 2037171f6537SJosef Bacik static void del_fs_roots(struct btrfs_fs_info *fs_info) 2038171f6537SJosef Bacik { 2039171f6537SJosef Bacik int ret; 2040171f6537SJosef Bacik struct btrfs_root *gang[8]; 2041171f6537SJosef Bacik int i; 2042171f6537SJosef Bacik 2043171f6537SJosef Bacik while (!list_empty(&fs_info->dead_roots)) { 2044171f6537SJosef Bacik gang[0] = list_entry(fs_info->dead_roots.next, 2045171f6537SJosef Bacik struct btrfs_root, root_list); 2046171f6537SJosef Bacik list_del(&gang[0]->root_list); 2047171f6537SJosef Bacik 2048171f6537SJosef Bacik if (gang[0]->in_radix) { 2049cb517eabSMiao Xie btrfs_drop_and_free_fs_root(fs_info, gang[0]); 2050171f6537SJosef Bacik } else { 2051171f6537SJosef Bacik free_extent_buffer(gang[0]->node); 2052171f6537SJosef Bacik free_extent_buffer(gang[0]->commit_root); 2053b0feb9d9SMiao Xie btrfs_put_fs_root(gang[0]); 2054171f6537SJosef Bacik } 2055171f6537SJosef Bacik } 2056171f6537SJosef Bacik 2057171f6537SJosef Bacik while (1) { 2058171f6537SJosef Bacik ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 2059171f6537SJosef Bacik (void **)gang, 0, 2060171f6537SJosef Bacik ARRAY_SIZE(gang)); 2061171f6537SJosef Bacik if (!ret) 2062171f6537SJosef Bacik break; 2063171f6537SJosef Bacik for (i = 0; i < ret; i++) 2064cb517eabSMiao Xie btrfs_drop_and_free_fs_root(fs_info, gang[i]); 2065171f6537SJosef Bacik } 2066171f6537SJosef Bacik } 2067af31f5e5SChris Mason 2068ad2b2c80SAl Viro int open_ctree(struct super_block *sb, 2069dfe25020SChris Mason struct btrfs_fs_devices *fs_devices, 2070dfe25020SChris Mason char *options) 2071eb60ceacSChris Mason { 2072db94535dSChris Mason u32 sectorsize; 2073db94535dSChris Mason u32 nodesize; 2074db94535dSChris Mason u32 leafsize; 2075db94535dSChris Mason u32 blocksize; 207687ee04ebSChris Mason u32 stripesize; 207784234f3aSYan Zheng u64 generation; 2078f2b636e8SJosef Bacik u64 features; 20793de4586cSChris Mason struct btrfs_key location; 2080a061fc8dSChris Mason struct buffer_head *bh; 20814d34b278SIlya Dryomov struct btrfs_super_block *disk_super; 2082815745cfSAl Viro struct btrfs_fs_info *fs_info = btrfs_sb(sb); 2083f84a8bd6SAl Viro struct btrfs_root *tree_root; 20844d34b278SIlya Dryomov struct btrfs_root *extent_root; 20854d34b278SIlya Dryomov struct btrfs_root *csum_root; 20864d34b278SIlya Dryomov struct btrfs_root *chunk_root; 20874d34b278SIlya Dryomov struct btrfs_root *dev_root; 2088bcef60f2SArne Jansen struct btrfs_root *quota_root; 2089f7a81ea4SStefan Behrens struct btrfs_root *uuid_root; 2090e02119d5SChris Mason struct btrfs_root *log_tree_root; 2091eb60ceacSChris Mason int ret; 2092e58ca020SYan int err = -EINVAL; 2093af31f5e5SChris Mason int num_backups_tried = 0; 2094af31f5e5SChris Mason int backup_index = 0; 209570f80175SStefan Behrens bool create_uuid_tree; 209670f80175SStefan Behrens bool check_uuid_tree; 20974543df7eSChris Mason 2098f84a8bd6SAl Viro tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info); 20996f07e42eSAl Viro chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info); 2100cb517eabSMiao Xie if (!tree_root || !chunk_root) { 210139279cc3SChris Mason err = -ENOMEM; 210239279cc3SChris Mason goto fail; 210339279cc3SChris Mason } 210476dda93cSYan, Zheng 210576dda93cSYan, Zheng ret = init_srcu_struct(&fs_info->subvol_srcu); 210676dda93cSYan, Zheng if (ret) { 210776dda93cSYan, Zheng err = ret; 210876dda93cSYan, Zheng goto fail; 210976dda93cSYan, Zheng } 211076dda93cSYan, Zheng 211176dda93cSYan, Zheng ret = setup_bdi(fs_info, &fs_info->bdi); 211276dda93cSYan, Zheng if (ret) { 211376dda93cSYan, Zheng err = ret; 211476dda93cSYan, Zheng goto fail_srcu; 211576dda93cSYan, Zheng } 211676dda93cSYan, Zheng 2117e2d84521SMiao Xie ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0); 2118e2d84521SMiao Xie if (ret) { 2119e2d84521SMiao Xie err = ret; 2120e2d84521SMiao Xie goto fail_bdi; 2121e2d84521SMiao Xie } 2122e2d84521SMiao Xie fs_info->dirty_metadata_batch = PAGE_CACHE_SIZE * 2123e2d84521SMiao Xie (1 + ilog2(nr_cpu_ids)); 2124e2d84521SMiao Xie 2125963d678bSMiao Xie ret = percpu_counter_init(&fs_info->delalloc_bytes, 0); 2126963d678bSMiao Xie if (ret) { 2127963d678bSMiao Xie err = ret; 2128963d678bSMiao Xie goto fail_dirty_metadata_bytes; 2129963d678bSMiao Xie } 2130963d678bSMiao Xie 213176dda93cSYan, Zheng fs_info->btree_inode = new_inode(sb); 213276dda93cSYan, Zheng if (!fs_info->btree_inode) { 213376dda93cSYan, Zheng err = -ENOMEM; 2134963d678bSMiao Xie goto fail_delalloc_bytes; 213576dda93cSYan, Zheng } 213676dda93cSYan, Zheng 2137a6591715SChris Mason mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); 21381561dedaSMiao Xie 213976dda93cSYan, Zheng INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 2140f28491e0SJosef Bacik INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC); 21418fd17795SChris Mason INIT_LIST_HEAD(&fs_info->trans_list); 2142facda1e7SChris Mason INIT_LIST_HEAD(&fs_info->dead_roots); 214324bbcf04SYan, Zheng INIT_LIST_HEAD(&fs_info->delayed_iputs); 2144eb73c1b7SMiao Xie INIT_LIST_HEAD(&fs_info->delalloc_roots); 214511833d66SYan Zheng INIT_LIST_HEAD(&fs_info->caching_block_groups); 2146eb73c1b7SMiao Xie spin_lock_init(&fs_info->delalloc_root_lock); 2147a4abeea4SJosef Bacik spin_lock_init(&fs_info->trans_lock); 214876dda93cSYan, Zheng spin_lock_init(&fs_info->fs_roots_radix_lock); 214924bbcf04SYan, Zheng spin_lock_init(&fs_info->delayed_iput_lock); 21504cb5300bSChris Mason spin_lock_init(&fs_info->defrag_inodes_lock); 21512bf64758SJosef Bacik spin_lock_init(&fs_info->free_chunk_lock); 2152f29021b2SJan Schmidt spin_lock_init(&fs_info->tree_mod_seq_lock); 2153ceda0864SMiao Xie spin_lock_init(&fs_info->super_lock); 2154f28491e0SJosef Bacik spin_lock_init(&fs_info->buffer_lock); 2155f29021b2SJan Schmidt rwlock_init(&fs_info->tree_mod_log_lock); 21567585717fSChris Mason mutex_init(&fs_info->reloc_mutex); 2157de98ced9SMiao Xie seqlock_init(&fs_info->profiles_lock); 215819c00ddcSChris Mason 215958176a96SJosef Bacik init_completion(&fs_info->kobj_unregister); 21600b86a832SChris Mason INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); 21616324fbf3SChris Mason INIT_LIST_HEAD(&fs_info->space_info); 2162f29021b2SJan Schmidt INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); 21630b86a832SChris Mason btrfs_mapping_init(&fs_info->mapping_tree); 216466d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->global_block_rsv, 216566d8f3ddSMiao Xie BTRFS_BLOCK_RSV_GLOBAL); 216666d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delalloc_block_rsv, 216766d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELALLOC); 216866d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); 216966d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); 217066d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); 217166d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delayed_block_rsv, 217266d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELOPS); 2173cb03c743SChris Mason atomic_set(&fs_info->nr_async_submits, 0); 2174771ed689SChris Mason atomic_set(&fs_info->async_delalloc_pages, 0); 21758c8bee1dSChris Mason atomic_set(&fs_info->async_submit_draining, 0); 21760986fe9eSChris Mason atomic_set(&fs_info->nr_async_bios, 0); 21774cb5300bSChris Mason atomic_set(&fs_info->defrag_running, 0); 2178fc36ed7eSJan Schmidt atomic64_set(&fs_info->tree_mod_seq, 0); 2179e20d96d6SChris Mason fs_info->sb = sb; 21806f568d35SChris Mason fs_info->max_inline = 8192 * 1024; 21819ed74f2dSJosef Bacik fs_info->metadata_ratio = 0; 21824cb5300bSChris Mason fs_info->defrag_inodes = RB_ROOT; 21832bf64758SJosef Bacik fs_info->free_chunk_space = 0; 2184f29021b2SJan Schmidt fs_info->tree_mod_log = RB_ROOT; 21858b87dc17SDavid Sterba fs_info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL; 2186c8b97818SChris Mason 218790519d66SArne Jansen /* readahead state */ 218890519d66SArne Jansen INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT); 218990519d66SArne Jansen spin_lock_init(&fs_info->reada_lock); 21902c90e5d6SChris Mason 2191b34b086cSChris Mason fs_info->thread_pool_size = min_t(unsigned long, 2192b34b086cSChris Mason num_online_cpus() + 2, 8); 21930afbaf8cSChris Mason 2194199c2a9cSMiao Xie INIT_LIST_HEAD(&fs_info->ordered_roots); 2195199c2a9cSMiao Xie spin_lock_init(&fs_info->ordered_root_lock); 219616cdcec7SMiao Xie fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), 219716cdcec7SMiao Xie GFP_NOFS); 219816cdcec7SMiao Xie if (!fs_info->delayed_root) { 219916cdcec7SMiao Xie err = -ENOMEM; 220016cdcec7SMiao Xie goto fail_iput; 220116cdcec7SMiao Xie } 220216cdcec7SMiao Xie btrfs_init_delayed_root(fs_info->delayed_root); 22033eaa2885SChris Mason 2204a2de733cSArne Jansen mutex_init(&fs_info->scrub_lock); 2205a2de733cSArne Jansen atomic_set(&fs_info->scrubs_running, 0); 2206a2de733cSArne Jansen atomic_set(&fs_info->scrub_pause_req, 0); 2207a2de733cSArne Jansen atomic_set(&fs_info->scrubs_paused, 0); 2208a2de733cSArne Jansen atomic_set(&fs_info->scrub_cancel_req, 0); 2209a2de733cSArne Jansen init_waitqueue_head(&fs_info->scrub_pause_wait); 2210a2de733cSArne Jansen fs_info->scrub_workers_refcnt = 0; 221121adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 221221adbd5cSStefan Behrens fs_info->check_integrity_print_mask = 0; 221321adbd5cSStefan Behrens #endif 2214a2de733cSArne Jansen 2215c9e9f97bSIlya Dryomov spin_lock_init(&fs_info->balance_lock); 2216c9e9f97bSIlya Dryomov mutex_init(&fs_info->balance_mutex); 2217837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_running, 0); 2218837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_pause_req, 0); 2219a7e99c69SIlya Dryomov atomic_set(&fs_info->balance_cancel_req, 0); 2220c9e9f97bSIlya Dryomov fs_info->balance_ctl = NULL; 2221837d5b6eSIlya Dryomov init_waitqueue_head(&fs_info->balance_wait_q); 2222a061fc8dSChris Mason 22230afbaf8cSChris Mason sb->s_blocksize = 4096; 22240afbaf8cSChris Mason sb->s_blocksize_bits = blksize_bits(4096); 222532a88aa1SJens Axboe sb->s_bdi = &fs_info->bdi; 22260afbaf8cSChris Mason 222776dda93cSYan, Zheng fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; 2228bfe86848SMiklos Szeredi set_nlink(fs_info->btree_inode, 1); 22290afbaf8cSChris Mason /* 22300afbaf8cSChris Mason * we set the i_size on the btree inode to the max possible int. 22310afbaf8cSChris Mason * the real end of the address space is determined by all of 22320afbaf8cSChris Mason * the devices in the system 22330afbaf8cSChris Mason */ 22340afbaf8cSChris Mason fs_info->btree_inode->i_size = OFFSET_MAX; 2235d98237b3SChris Mason fs_info->btree_inode->i_mapping->a_ops = &btree_aops; 223604160088SChris Mason fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; 223704160088SChris Mason 22385d4f98a2SYan Zheng RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); 2239d1310b2eSChris Mason extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, 2240f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 22410b32f4bbSJosef Bacik BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; 2242a8067e02SDavid Sterba extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); 22430da5468fSChris Mason 2244d1310b2eSChris Mason BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; 2245d1310b2eSChris Mason 22460f7d52f4SChris Mason BTRFS_I(fs_info->btree_inode)->root = tree_root; 22470f7d52f4SChris Mason memset(&BTRFS_I(fs_info->btree_inode)->location, 0, 22480f7d52f4SChris Mason sizeof(struct btrfs_key)); 224972ac3c0dSJosef Bacik set_bit(BTRFS_INODE_DUMMY, 225072ac3c0dSJosef Bacik &BTRFS_I(fs_info->btree_inode)->runtime_flags); 2251778ba82bSFilipe David Borba Manana btrfs_insert_inode_hash(fs_info->btree_inode); 225239279cc3SChris Mason 2253e02119d5SChris Mason spin_lock_init(&fs_info->block_group_cache_lock); 22546bef4d31SEric Paris fs_info->block_group_cache_tree = RB_ROOT; 2255a1897fddSLiu Bo fs_info->first_logical_byte = (u64)-1; 2256925baeddSChris Mason 225711833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[0], 2258f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 225911833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[1], 2260f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 226111833d66SYan Zheng fs_info->pinned_extents = &fs_info->freed_extents[0]; 2262e6dcd2dcSChris Mason fs_info->do_barriers = 1; 2263f9295749SChris Mason 2264d98237b3SChris Mason 22655a3f23d5SChris Mason mutex_init(&fs_info->ordered_operations_mutex); 22669ffba8cdSJosef Bacik mutex_init(&fs_info->ordered_extent_flush_mutex); 226730ae8467SChris Mason mutex_init(&fs_info->tree_log_mutex); 2268925baeddSChris Mason mutex_init(&fs_info->chunk_mutex); 2269925baeddSChris Mason mutex_init(&fs_info->transaction_kthread_mutex); 2270a74a4b97SChris Mason mutex_init(&fs_info->cleaner_mutex); 2271a74a4b97SChris Mason mutex_init(&fs_info->volume_mutex); 2272276e680dSYan Zheng init_rwsem(&fs_info->extent_commit_sem); 2273c71bf099SYan, Zheng init_rwsem(&fs_info->cleanup_work_sem); 227476dda93cSYan, Zheng init_rwsem(&fs_info->subvol_sem); 2275803b2f54SStefan Behrens sema_init(&fs_info->uuid_tree_rescan_sem, 1); 2276e922e087SStefan Behrens fs_info->dev_replace.lock_owner = 0; 2277e922e087SStefan Behrens atomic_set(&fs_info->dev_replace.nesting_level, 0); 2278e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); 2279e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock_management_lock); 2280e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock); 2281fa9c0d79SChris Mason 2282416ac51dSArne Jansen spin_lock_init(&fs_info->qgroup_lock); 2283f2f6ed3dSWang Shilong mutex_init(&fs_info->qgroup_ioctl_lock); 2284416ac51dSArne Jansen fs_info->qgroup_tree = RB_ROOT; 2285416ac51dSArne Jansen INIT_LIST_HEAD(&fs_info->dirty_qgroups); 2286416ac51dSArne Jansen fs_info->qgroup_seq = 1; 2287416ac51dSArne Jansen fs_info->quota_enabled = 0; 2288416ac51dSArne Jansen fs_info->pending_quota_state = 0; 22891e8f9158SWang Shilong fs_info->qgroup_ulist = NULL; 22902f232036SJan Schmidt mutex_init(&fs_info->qgroup_rescan_lock); 2291416ac51dSArne Jansen 2292fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); 2293fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->data_alloc_cluster); 2294fa9c0d79SChris Mason 22957d9eb12cSChris Mason init_waitqueue_head(&fs_info->transaction_throttle); 22963768f368SChris Mason init_waitqueue_head(&fs_info->transaction_wait); 2297bb9c12c9SSage Weil init_waitqueue_head(&fs_info->transaction_blocked_wait); 22984854ddd0SChris Mason init_waitqueue_head(&fs_info->async_submit_wait); 22999a8dd150SChris Mason 230053b381b3SDavid Woodhouse ret = btrfs_alloc_stripe_hash_table(fs_info); 230153b381b3SDavid Woodhouse if (ret) { 230283c8266aSDavid Sterba err = ret; 230353b381b3SDavid Woodhouse goto fail_alloc; 230453b381b3SDavid Woodhouse } 230553b381b3SDavid Woodhouse 23060b86a832SChris Mason __setup_root(4096, 4096, 4096, 4096, tree_root, 23072c90e5d6SChris Mason fs_info, BTRFS_ROOT_TREE_OBJECTID); 23087eccb903SChris Mason 23093c4bb26bSChris Mason invalidate_bdev(fs_devices->latest_bdev); 23101104a885SDavid Sterba 23111104a885SDavid Sterba /* 23121104a885SDavid Sterba * Read super block and check the signature bytes only 23131104a885SDavid Sterba */ 2314a512bbf8SYan Zheng bh = btrfs_read_dev_super(fs_devices->latest_bdev); 231520b45077SDave Young if (!bh) { 231620b45077SDave Young err = -EINVAL; 231716cdcec7SMiao Xie goto fail_alloc; 231820b45077SDave Young } 231939279cc3SChris Mason 23201104a885SDavid Sterba /* 23211104a885SDavid Sterba * We want to check superblock checksum, the type is stored inside. 23221104a885SDavid Sterba * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k). 23231104a885SDavid Sterba */ 23241104a885SDavid Sterba if (btrfs_check_super_csum(bh->b_data)) { 23251104a885SDavid Sterba printk(KERN_ERR "btrfs: superblock checksum mismatch\n"); 23261104a885SDavid Sterba err = -EINVAL; 23271104a885SDavid Sterba goto fail_alloc; 23281104a885SDavid Sterba } 23291104a885SDavid Sterba 23301104a885SDavid Sterba /* 23311104a885SDavid Sterba * super_copy is zeroed at allocation time and we never touch the 23321104a885SDavid Sterba * following bytes up to INFO_SIZE, the checksum is calculated from 23331104a885SDavid Sterba * the whole block of INFO_SIZE 23341104a885SDavid Sterba */ 23356c41761fSDavid Sterba memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); 23366c41761fSDavid Sterba memcpy(fs_info->super_for_commit, fs_info->super_copy, 23376c41761fSDavid Sterba sizeof(*fs_info->super_for_commit)); 2338a061fc8dSChris Mason brelse(bh); 23395f39d397SChris Mason 23406c41761fSDavid Sterba memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); 23410b86a832SChris Mason 23421104a885SDavid Sterba ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); 23431104a885SDavid Sterba if (ret) { 23441104a885SDavid Sterba printk(KERN_ERR "btrfs: superblock contains fatal errors\n"); 23451104a885SDavid Sterba err = -EINVAL; 23461104a885SDavid Sterba goto fail_alloc; 23471104a885SDavid Sterba } 23481104a885SDavid Sterba 23496c41761fSDavid Sterba disk_super = fs_info->super_copy; 23500f7d52f4SChris Mason if (!btrfs_super_root(disk_super)) 235116cdcec7SMiao Xie goto fail_alloc; 23520f7d52f4SChris Mason 2353acce952bSliubo /* check FS state, whether FS is broken. */ 235487533c47SMiao Xie if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) 235587533c47SMiao Xie set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); 2356acce952bSliubo 235775e7cb7fSLiu Bo /* 2358af31f5e5SChris Mason * run through our array of backup supers and setup 2359af31f5e5SChris Mason * our ring pointer to the oldest one 2360af31f5e5SChris Mason */ 2361af31f5e5SChris Mason generation = btrfs_super_generation(disk_super); 2362af31f5e5SChris Mason find_oldest_super_backup(fs_info, generation); 2363af31f5e5SChris Mason 2364af31f5e5SChris Mason /* 236575e7cb7fSLiu Bo * In the long term, we'll store the compression type in the super 236675e7cb7fSLiu Bo * block, and it'll be used for per file compression control. 236775e7cb7fSLiu Bo */ 236875e7cb7fSLiu Bo fs_info->compress_type = BTRFS_COMPRESS_ZLIB; 236975e7cb7fSLiu Bo 23702b82032cSYan Zheng ret = btrfs_parse_options(tree_root, options); 23712b82032cSYan Zheng if (ret) { 23722b82032cSYan Zheng err = ret; 237316cdcec7SMiao Xie goto fail_alloc; 23742b82032cSYan Zheng } 2375dfe25020SChris Mason 2376f2b636e8SJosef Bacik features = btrfs_super_incompat_flags(disk_super) & 2377f2b636e8SJosef Bacik ~BTRFS_FEATURE_INCOMPAT_SUPP; 2378f2b636e8SJosef Bacik if (features) { 2379f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount because of " 2380f2b636e8SJosef Bacik "unsupported optional features (%Lx).\n", 2381c1c9ff7cSGeert Uytterhoeven features); 2382f2b636e8SJosef Bacik err = -EINVAL; 238316cdcec7SMiao Xie goto fail_alloc; 2384f2b636e8SJosef Bacik } 2385f2b636e8SJosef Bacik 2386727011e0SChris Mason if (btrfs_super_leafsize(disk_super) != 2387727011e0SChris Mason btrfs_super_nodesize(disk_super)) { 2388727011e0SChris Mason printk(KERN_ERR "BTRFS: couldn't mount because metadata " 2389727011e0SChris Mason "blocksizes don't match. node %d leaf %d\n", 2390727011e0SChris Mason btrfs_super_nodesize(disk_super), 2391727011e0SChris Mason btrfs_super_leafsize(disk_super)); 2392727011e0SChris Mason err = -EINVAL; 2393727011e0SChris Mason goto fail_alloc; 2394727011e0SChris Mason } 2395727011e0SChris Mason if (btrfs_super_leafsize(disk_super) > BTRFS_MAX_METADATA_BLOCKSIZE) { 2396727011e0SChris Mason printk(KERN_ERR "BTRFS: couldn't mount because metadata " 2397727011e0SChris Mason "blocksize (%d) was too large\n", 2398727011e0SChris Mason btrfs_super_leafsize(disk_super)); 2399727011e0SChris Mason err = -EINVAL; 2400727011e0SChris Mason goto fail_alloc; 2401727011e0SChris Mason } 2402727011e0SChris Mason 24035d4f98a2SYan Zheng features = btrfs_super_incompat_flags(disk_super); 24045d4f98a2SYan Zheng features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; 240569e380d1SLi Zefan if (tree_root->fs_info->compress_type == BTRFS_COMPRESS_LZO) 2406a6fa6faeSLi Zefan features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; 2407727011e0SChris Mason 24083173a18fSJosef Bacik if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) 24093173a18fSJosef Bacik printk(KERN_ERR "btrfs: has skinny extents\n"); 24103173a18fSJosef Bacik 2411727011e0SChris Mason /* 2412727011e0SChris Mason * flag our filesystem as having big metadata blocks if 2413727011e0SChris Mason * they are bigger than the page size 2414727011e0SChris Mason */ 2415727011e0SChris Mason if (btrfs_super_leafsize(disk_super) > PAGE_CACHE_SIZE) { 2416727011e0SChris Mason if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) 2417727011e0SChris Mason printk(KERN_INFO "btrfs flagging fs with big metadata feature\n"); 2418727011e0SChris Mason features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; 2419727011e0SChris Mason } 2420727011e0SChris Mason 2421bc3f116fSChris Mason nodesize = btrfs_super_nodesize(disk_super); 2422bc3f116fSChris Mason leafsize = btrfs_super_leafsize(disk_super); 2423bc3f116fSChris Mason sectorsize = btrfs_super_sectorsize(disk_super); 2424bc3f116fSChris Mason stripesize = btrfs_super_stripesize(disk_super); 2425e2d84521SMiao Xie fs_info->dirty_metadata_batch = leafsize * (1 + ilog2(nr_cpu_ids)); 2426963d678bSMiao Xie fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); 2427bc3f116fSChris Mason 2428bc3f116fSChris Mason /* 2429bc3f116fSChris Mason * mixed block groups end up with duplicate but slightly offset 2430bc3f116fSChris Mason * extent buffers for the same range. It leads to corruptions 2431bc3f116fSChris Mason */ 2432bc3f116fSChris Mason if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && 2433bc3f116fSChris Mason (sectorsize != leafsize)) { 2434bc3f116fSChris Mason printk(KERN_WARNING "btrfs: unequal leaf/node/sector sizes " 2435bc3f116fSChris Mason "are not allowed for mixed block groups on %s\n", 2436bc3f116fSChris Mason sb->s_id); 2437bc3f116fSChris Mason goto fail_alloc; 2438bc3f116fSChris Mason } 2439bc3f116fSChris Mason 2440ceda0864SMiao Xie /* 2441ceda0864SMiao Xie * Needn't use the lock because there is no other task which will 2442ceda0864SMiao Xie * update the flag. 2443ceda0864SMiao Xie */ 24445d4f98a2SYan Zheng btrfs_set_super_incompat_flags(disk_super, features); 24455d4f98a2SYan Zheng 2446f2b636e8SJosef Bacik features = btrfs_super_compat_ro_flags(disk_super) & 2447f2b636e8SJosef Bacik ~BTRFS_FEATURE_COMPAT_RO_SUPP; 2448f2b636e8SJosef Bacik if (!(sb->s_flags & MS_RDONLY) && features) { 2449f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount RDWR because of " 2450f2b636e8SJosef Bacik "unsupported option features (%Lx).\n", 2451c1c9ff7cSGeert Uytterhoeven features); 2452f2b636e8SJosef Bacik err = -EINVAL; 245316cdcec7SMiao Xie goto fail_alloc; 2454f2b636e8SJosef Bacik } 245561d92c32SChris Mason 245661d92c32SChris Mason btrfs_init_workers(&fs_info->generic_worker, 245761d92c32SChris Mason "genwork", 1, NULL); 245861d92c32SChris Mason 24595443be45SChris Mason btrfs_init_workers(&fs_info->workers, "worker", 246061d92c32SChris Mason fs_info->thread_pool_size, 246161d92c32SChris Mason &fs_info->generic_worker); 2462c8b97818SChris Mason 2463771ed689SChris Mason btrfs_init_workers(&fs_info->delalloc_workers, "delalloc", 246445d5fd14SJosef Bacik fs_info->thread_pool_size, NULL); 2465771ed689SChris Mason 24668ccf6f19SMiao Xie btrfs_init_workers(&fs_info->flush_workers, "flush_delalloc", 246745d5fd14SJosef Bacik fs_info->thread_pool_size, NULL); 24688ccf6f19SMiao Xie 24695443be45SChris Mason btrfs_init_workers(&fs_info->submit_workers, "submit", 2470b720d209SChris Mason min_t(u64, fs_devices->num_devices, 247145d5fd14SJosef Bacik fs_info->thread_pool_size), NULL); 247261b49440SChris Mason 2473bab39bf9SJosef Bacik btrfs_init_workers(&fs_info->caching_workers, "cache", 247445d5fd14SJosef Bacik fs_info->thread_pool_size, NULL); 2475bab39bf9SJosef Bacik 247661b49440SChris Mason /* a higher idle thresh on the submit workers makes it much more 247761b49440SChris Mason * likely that bios will be send down in a sane order to the 247861b49440SChris Mason * devices 247961b49440SChris Mason */ 248061b49440SChris Mason fs_info->submit_workers.idle_thresh = 64; 248153863232SChris Mason 2482771ed689SChris Mason fs_info->workers.idle_thresh = 16; 24834a69a410SChris Mason fs_info->workers.ordered = 1; 248461b49440SChris Mason 2485771ed689SChris Mason fs_info->delalloc_workers.idle_thresh = 2; 2486771ed689SChris Mason fs_info->delalloc_workers.ordered = 1; 2487771ed689SChris Mason 248861d92c32SChris Mason btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1, 248961d92c32SChris Mason &fs_info->generic_worker); 24905443be45SChris Mason btrfs_init_workers(&fs_info->endio_workers, "endio", 249161d92c32SChris Mason fs_info->thread_pool_size, 249261d92c32SChris Mason &fs_info->generic_worker); 2493d20f7043SChris Mason btrfs_init_workers(&fs_info->endio_meta_workers, "endio-meta", 249461d92c32SChris Mason fs_info->thread_pool_size, 249561d92c32SChris Mason &fs_info->generic_worker); 2496cad321adSChris Mason btrfs_init_workers(&fs_info->endio_meta_write_workers, 249761d92c32SChris Mason "endio-meta-write", fs_info->thread_pool_size, 249861d92c32SChris Mason &fs_info->generic_worker); 249953b381b3SDavid Woodhouse btrfs_init_workers(&fs_info->endio_raid56_workers, 250053b381b3SDavid Woodhouse "endio-raid56", fs_info->thread_pool_size, 250153b381b3SDavid Woodhouse &fs_info->generic_worker); 250253b381b3SDavid Woodhouse btrfs_init_workers(&fs_info->rmw_workers, 250353b381b3SDavid Woodhouse "rmw", fs_info->thread_pool_size, 250453b381b3SDavid Woodhouse &fs_info->generic_worker); 25055443be45SChris Mason btrfs_init_workers(&fs_info->endio_write_workers, "endio-write", 250661d92c32SChris Mason fs_info->thread_pool_size, 250761d92c32SChris Mason &fs_info->generic_worker); 25080cb59c99SJosef Bacik btrfs_init_workers(&fs_info->endio_freespace_worker, "freespace-write", 25090cb59c99SJosef Bacik 1, &fs_info->generic_worker); 251016cdcec7SMiao Xie btrfs_init_workers(&fs_info->delayed_workers, "delayed-meta", 251116cdcec7SMiao Xie fs_info->thread_pool_size, 251216cdcec7SMiao Xie &fs_info->generic_worker); 251390519d66SArne Jansen btrfs_init_workers(&fs_info->readahead_workers, "readahead", 251490519d66SArne Jansen fs_info->thread_pool_size, 251590519d66SArne Jansen &fs_info->generic_worker); 25162f232036SJan Schmidt btrfs_init_workers(&fs_info->qgroup_rescan_workers, "qgroup-rescan", 1, 25172f232036SJan Schmidt &fs_info->generic_worker); 251861b49440SChris Mason 251961b49440SChris Mason /* 252061b49440SChris Mason * endios are largely parallel and should have a very 252161b49440SChris Mason * low idle thresh 252261b49440SChris Mason */ 252361b49440SChris Mason fs_info->endio_workers.idle_thresh = 4; 2524b51912c9SChris Mason fs_info->endio_meta_workers.idle_thresh = 4; 252553b381b3SDavid Woodhouse fs_info->endio_raid56_workers.idle_thresh = 4; 252653b381b3SDavid Woodhouse fs_info->rmw_workers.idle_thresh = 2; 2527b51912c9SChris Mason 25289042846bSChris Mason fs_info->endio_write_workers.idle_thresh = 2; 25299042846bSChris Mason fs_info->endio_meta_write_workers.idle_thresh = 2; 253090519d66SArne Jansen fs_info->readahead_workers.idle_thresh = 2; 25319042846bSChris Mason 25320dc3b84aSJosef Bacik /* 25330dc3b84aSJosef Bacik * btrfs_start_workers can really only fail because of ENOMEM so just 25340dc3b84aSJosef Bacik * return -ENOMEM if any of these fail. 25350dc3b84aSJosef Bacik */ 25360dc3b84aSJosef Bacik ret = btrfs_start_workers(&fs_info->workers); 25370dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->generic_worker); 25380dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->submit_workers); 25390dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delalloc_workers); 25400dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->fixup_workers); 25410dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_workers); 25420dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_workers); 254353b381b3SDavid Woodhouse ret |= btrfs_start_workers(&fs_info->rmw_workers); 254453b381b3SDavid Woodhouse ret |= btrfs_start_workers(&fs_info->endio_raid56_workers); 25450dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_write_workers); 25460dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_write_workers); 25470dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_freespace_worker); 25480dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delayed_workers); 25490dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->caching_workers); 25500dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->readahead_workers); 25518ccf6f19SMiao Xie ret |= btrfs_start_workers(&fs_info->flush_workers); 25522f232036SJan Schmidt ret |= btrfs_start_workers(&fs_info->qgroup_rescan_workers); 25530dc3b84aSJosef Bacik if (ret) { 2554fed425c7SIlya Dryomov err = -ENOMEM; 25550dc3b84aSJosef Bacik goto fail_sb_buffer; 25560dc3b84aSJosef Bacik } 25574543df7eSChris Mason 25584575c9ccSChris Mason fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); 2559c8b97818SChris Mason fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, 2560c8b97818SChris Mason 4 * 1024 * 1024 / PAGE_CACHE_SIZE); 25614575c9ccSChris Mason 2562db94535dSChris Mason tree_root->nodesize = nodesize; 2563db94535dSChris Mason tree_root->leafsize = leafsize; 2564db94535dSChris Mason tree_root->sectorsize = sectorsize; 256587ee04ebSChris Mason tree_root->stripesize = stripesize; 2566a061fc8dSChris Mason 2567a061fc8dSChris Mason sb->s_blocksize = sectorsize; 2568a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(sectorsize); 2569db94535dSChris Mason 25703cae210fSQu Wenruo if (btrfs_super_magic(disk_super) != BTRFS_MAGIC) { 2571d397712bSChris Mason printk(KERN_INFO "btrfs: valid FS not found on %s\n", sb->s_id); 257239279cc3SChris Mason goto fail_sb_buffer; 257339279cc3SChris Mason } 257419c00ddcSChris Mason 25758d082fb7SLiu Bo if (sectorsize != PAGE_SIZE) { 25768d082fb7SLiu Bo printk(KERN_WARNING "btrfs: Incompatible sector size(%lu) " 25778d082fb7SLiu Bo "found on %s\n", (unsigned long)sectorsize, sb->s_id); 2578941b2ddfSKeith Mannthey goto fail_sb_buffer; 2579941b2ddfSKeith Mannthey } 2580941b2ddfSKeith Mannthey 2581925baeddSChris Mason mutex_lock(&fs_info->chunk_mutex); 2582e4404d6eSYan Zheng ret = btrfs_read_sys_array(tree_root); 2583925baeddSChris Mason mutex_unlock(&fs_info->chunk_mutex); 258484eed90fSChris Mason if (ret) { 2585d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read the system " 2586d397712bSChris Mason "array on %s\n", sb->s_id); 25875d4f98a2SYan Zheng goto fail_sb_buffer; 258884eed90fSChris Mason } 25890b86a832SChris Mason 25900b86a832SChris Mason blocksize = btrfs_level_size(tree_root, 25910b86a832SChris Mason btrfs_super_chunk_root_level(disk_super)); 259284234f3aSYan Zheng generation = btrfs_super_chunk_root_generation(disk_super); 25930b86a832SChris Mason 25940b86a832SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 25950b86a832SChris Mason chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); 25960b86a832SChris Mason 25970b86a832SChris Mason chunk_root->node = read_tree_block(chunk_root, 25980b86a832SChris Mason btrfs_super_chunk_root(disk_super), 259984234f3aSYan Zheng blocksize, generation); 2600416bc658SJosef Bacik if (!chunk_root->node || 2601416bc658SJosef Bacik !test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { 260283121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n", 260383121942SDavid Woodhouse sb->s_id); 2604af31f5e5SChris Mason goto fail_tree_roots; 260583121942SDavid Woodhouse } 26065d4f98a2SYan Zheng btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); 26075d4f98a2SYan Zheng chunk_root->commit_root = btrfs_root_node(chunk_root); 26080b86a832SChris Mason 2609e17cade2SChris Mason read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, 2610b308bc2fSGeert Uytterhoeven btrfs_header_chunk_tree_uuid(chunk_root->node), BTRFS_UUID_SIZE); 2611e17cade2SChris Mason 26120b86a832SChris Mason ret = btrfs_read_chunk_tree(chunk_root); 26132b82032cSYan Zheng if (ret) { 2614d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read chunk tree on %s\n", 2615d397712bSChris Mason sb->s_id); 2616af31f5e5SChris Mason goto fail_tree_roots; 26172b82032cSYan Zheng } 26180b86a832SChris Mason 26198dabb742SStefan Behrens /* 26208dabb742SStefan Behrens * keep the device that is marked to be the target device for the 26218dabb742SStefan Behrens * dev_replace procedure 26228dabb742SStefan Behrens */ 26238dabb742SStefan Behrens btrfs_close_extra_devices(fs_info, fs_devices, 0); 2624dfe25020SChris Mason 2625a6b0d5c8SChris Mason if (!fs_devices->latest_bdev) { 2626a6b0d5c8SChris Mason printk(KERN_CRIT "btrfs: failed to read devices on %s\n", 2627a6b0d5c8SChris Mason sb->s_id); 2628a6b0d5c8SChris Mason goto fail_tree_roots; 2629a6b0d5c8SChris Mason } 2630a6b0d5c8SChris Mason 2631af31f5e5SChris Mason retry_root_backup: 2632db94535dSChris Mason blocksize = btrfs_level_size(tree_root, 2633db94535dSChris Mason btrfs_super_root_level(disk_super)); 263484234f3aSYan Zheng generation = btrfs_super_generation(disk_super); 26350b86a832SChris Mason 2636e20d96d6SChris Mason tree_root->node = read_tree_block(tree_root, 2637db94535dSChris Mason btrfs_super_root(disk_super), 263884234f3aSYan Zheng blocksize, generation); 2639af31f5e5SChris Mason if (!tree_root->node || 2640af31f5e5SChris Mason !test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) { 264183121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read tree root on %s\n", 264283121942SDavid Woodhouse sb->s_id); 2643af31f5e5SChris Mason 2644af31f5e5SChris Mason goto recovery_tree_root; 264583121942SDavid Woodhouse } 2646af31f5e5SChris Mason 26475d4f98a2SYan Zheng btrfs_set_root_node(&tree_root->root_item, tree_root->node); 26485d4f98a2SYan Zheng tree_root->commit_root = btrfs_root_node(tree_root); 264969e9c6c6SStefan Behrens btrfs_set_root_refs(&tree_root->root_item, 1); 2650db94535dSChris Mason 2651cb517eabSMiao Xie location.objectid = BTRFS_EXTENT_TREE_OBJECTID; 2652cb517eabSMiao Xie location.type = BTRFS_ROOT_ITEM_KEY; 2653cb517eabSMiao Xie location.offset = 0; 2654cb517eabSMiao Xie 2655cb517eabSMiao Xie extent_root = btrfs_read_tree_root(tree_root, &location); 2656cb517eabSMiao Xie if (IS_ERR(extent_root)) { 2657cb517eabSMiao Xie ret = PTR_ERR(extent_root); 2658af31f5e5SChris Mason goto recovery_tree_root; 2659cb517eabSMiao Xie } 26600b86a832SChris Mason extent_root->track_dirty = 1; 2661cb517eabSMiao Xie fs_info->extent_root = extent_root; 26620b86a832SChris Mason 2663cb517eabSMiao Xie location.objectid = BTRFS_DEV_TREE_OBJECTID; 2664cb517eabSMiao Xie dev_root = btrfs_read_tree_root(tree_root, &location); 2665cb517eabSMiao Xie if (IS_ERR(dev_root)) { 2666cb517eabSMiao Xie ret = PTR_ERR(dev_root); 2667af31f5e5SChris Mason goto recovery_tree_root; 2668cb517eabSMiao Xie } 26695d4f98a2SYan Zheng dev_root->track_dirty = 1; 2670cb517eabSMiao Xie fs_info->dev_root = dev_root; 2671cb517eabSMiao Xie btrfs_init_devices_late(fs_info); 26723768f368SChris Mason 2673cb517eabSMiao Xie location.objectid = BTRFS_CSUM_TREE_OBJECTID; 2674cb517eabSMiao Xie csum_root = btrfs_read_tree_root(tree_root, &location); 2675cb517eabSMiao Xie if (IS_ERR(csum_root)) { 2676cb517eabSMiao Xie ret = PTR_ERR(csum_root); 2677af31f5e5SChris Mason goto recovery_tree_root; 2678cb517eabSMiao Xie } 2679d20f7043SChris Mason csum_root->track_dirty = 1; 2680cb517eabSMiao Xie fs_info->csum_root = csum_root; 2681d20f7043SChris Mason 2682cb517eabSMiao Xie location.objectid = BTRFS_QUOTA_TREE_OBJECTID; 2683cb517eabSMiao Xie quota_root = btrfs_read_tree_root(tree_root, &location); 2684cb517eabSMiao Xie if (!IS_ERR(quota_root)) { 2685bcef60f2SArne Jansen quota_root->track_dirty = 1; 2686bcef60f2SArne Jansen fs_info->quota_enabled = 1; 2687bcef60f2SArne Jansen fs_info->pending_quota_state = 1; 2688cb517eabSMiao Xie fs_info->quota_root = quota_root; 2689bcef60f2SArne Jansen } 2690bcef60f2SArne Jansen 2691f7a81ea4SStefan Behrens location.objectid = BTRFS_UUID_TREE_OBJECTID; 2692f7a81ea4SStefan Behrens uuid_root = btrfs_read_tree_root(tree_root, &location); 2693f7a81ea4SStefan Behrens if (IS_ERR(uuid_root)) { 2694f7a81ea4SStefan Behrens ret = PTR_ERR(uuid_root); 2695f7a81ea4SStefan Behrens if (ret != -ENOENT) 2696f7a81ea4SStefan Behrens goto recovery_tree_root; 2697f7a81ea4SStefan Behrens create_uuid_tree = true; 269870f80175SStefan Behrens check_uuid_tree = false; 2699f7a81ea4SStefan Behrens } else { 2700f7a81ea4SStefan Behrens uuid_root->track_dirty = 1; 2701f7a81ea4SStefan Behrens fs_info->uuid_root = uuid_root; 270270f80175SStefan Behrens create_uuid_tree = false; 270370f80175SStefan Behrens check_uuid_tree = 270470f80175SStefan Behrens generation != btrfs_super_uuid_tree_generation(disk_super); 2705f7a81ea4SStefan Behrens } 2706f7a81ea4SStefan Behrens 27078929ecfaSYan, Zheng fs_info->generation = generation; 27088929ecfaSYan, Zheng fs_info->last_trans_committed = generation; 27098929ecfaSYan, Zheng 271068310a5eSIlya Dryomov ret = btrfs_recover_balance(fs_info); 271168310a5eSIlya Dryomov if (ret) { 271268310a5eSIlya Dryomov printk(KERN_WARNING "btrfs: failed to recover balance\n"); 271368310a5eSIlya Dryomov goto fail_block_groups; 271468310a5eSIlya Dryomov } 271568310a5eSIlya Dryomov 2716733f4fbbSStefan Behrens ret = btrfs_init_dev_stats(fs_info); 2717733f4fbbSStefan Behrens if (ret) { 2718733f4fbbSStefan Behrens printk(KERN_ERR "btrfs: failed to init dev_stats: %d\n", 2719733f4fbbSStefan Behrens ret); 2720733f4fbbSStefan Behrens goto fail_block_groups; 2721733f4fbbSStefan Behrens } 2722733f4fbbSStefan Behrens 27238dabb742SStefan Behrens ret = btrfs_init_dev_replace(fs_info); 27248dabb742SStefan Behrens if (ret) { 27258dabb742SStefan Behrens pr_err("btrfs: failed to init dev_replace: %d\n", ret); 27268dabb742SStefan Behrens goto fail_block_groups; 27278dabb742SStefan Behrens } 27288dabb742SStefan Behrens 27298dabb742SStefan Behrens btrfs_close_extra_devices(fs_info, fs_devices, 1); 27308dabb742SStefan Behrens 27315ac1d209SJeff Mahoney ret = btrfs_sysfs_add_one(fs_info); 27325ac1d209SJeff Mahoney if (ret) { 27335ac1d209SJeff Mahoney pr_err("btrfs: failed to init sysfs interface: %d\n", ret); 27345ac1d209SJeff Mahoney goto fail_block_groups; 27355ac1d209SJeff Mahoney } 27365ac1d209SJeff Mahoney 2737c59021f8Sliubo ret = btrfs_init_space_info(fs_info); 2738c59021f8Sliubo if (ret) { 2739c59021f8Sliubo printk(KERN_ERR "Failed to initial space info: %d\n", ret); 2740c59021f8Sliubo goto fail_block_groups; 2741c59021f8Sliubo } 2742c59021f8Sliubo 27431b1d1f66SJosef Bacik ret = btrfs_read_block_groups(extent_root); 27441b1d1f66SJosef Bacik if (ret) { 27451b1d1f66SJosef Bacik printk(KERN_ERR "Failed to read block groups: %d\n", ret); 27461b1d1f66SJosef Bacik goto fail_block_groups; 27471b1d1f66SJosef Bacik } 27485af3e8ccSStefan Behrens fs_info->num_tolerated_disk_barrier_failures = 27495af3e8ccSStefan Behrens btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); 2750292fd7fcSStefan Behrens if (fs_info->fs_devices->missing_devices > 2751292fd7fcSStefan Behrens fs_info->num_tolerated_disk_barrier_failures && 2752292fd7fcSStefan Behrens !(sb->s_flags & MS_RDONLY)) { 2753292fd7fcSStefan Behrens printk(KERN_WARNING 2754292fd7fcSStefan Behrens "Btrfs: too many missing devices, writeable mount is not allowed\n"); 2755292fd7fcSStefan Behrens goto fail_block_groups; 2756292fd7fcSStefan Behrens } 27579078a3e1SChris Mason 2758a74a4b97SChris Mason fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 2759a74a4b97SChris Mason "btrfs-cleaner"); 276057506d50SQinghuang Feng if (IS_ERR(fs_info->cleaner_kthread)) 27611b1d1f66SJosef Bacik goto fail_block_groups; 2762a74a4b97SChris Mason 2763a74a4b97SChris Mason fs_info->transaction_kthread = kthread_run(transaction_kthread, 2764a74a4b97SChris Mason tree_root, 2765a74a4b97SChris Mason "btrfs-transaction"); 276657506d50SQinghuang Feng if (IS_ERR(fs_info->transaction_kthread)) 27673f157a2fSChris Mason goto fail_cleaner; 2768a74a4b97SChris Mason 2769c289811cSChris Mason if (!btrfs_test_opt(tree_root, SSD) && 2770c289811cSChris Mason !btrfs_test_opt(tree_root, NOSSD) && 2771c289811cSChris Mason !fs_info->fs_devices->rotating) { 2772c289811cSChris Mason printk(KERN_INFO "Btrfs detected SSD devices, enabling SSD " 2773c289811cSChris Mason "mode\n"); 2774c289811cSChris Mason btrfs_set_opt(fs_info->mount_opt, SSD); 2775c289811cSChris Mason } 2776c289811cSChris Mason 277721adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 277821adbd5cSStefan Behrens if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { 277921adbd5cSStefan Behrens ret = btrfsic_mount(tree_root, fs_devices, 278021adbd5cSStefan Behrens btrfs_test_opt(tree_root, 278121adbd5cSStefan Behrens CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? 278221adbd5cSStefan Behrens 1 : 0, 278321adbd5cSStefan Behrens fs_info->check_integrity_print_mask); 278421adbd5cSStefan Behrens if (ret) 278521adbd5cSStefan Behrens printk(KERN_WARNING "btrfs: failed to initialize" 278621adbd5cSStefan Behrens " integrity check module %s\n", sb->s_id); 278721adbd5cSStefan Behrens } 278821adbd5cSStefan Behrens #endif 2789bcef60f2SArne Jansen ret = btrfs_read_qgroup_config(fs_info); 2790bcef60f2SArne Jansen if (ret) 2791bcef60f2SArne Jansen goto fail_trans_kthread; 279221adbd5cSStefan Behrens 2793acce952bSliubo /* do not make disk changes in broken FS */ 279468ce9682SStefan Behrens if (btrfs_super_log_root(disk_super) != 0) { 2795e02119d5SChris Mason u64 bytenr = btrfs_super_log_root(disk_super); 2796d18a2c44SChris Mason 27977c2ca468SChris Mason if (fs_devices->rw_devices == 0) { 2798d397712bSChris Mason printk(KERN_WARNING "Btrfs log replay required " 2799d397712bSChris Mason "on RO media\n"); 28007c2ca468SChris Mason err = -EIO; 2801bcef60f2SArne Jansen goto fail_qgroup; 28027c2ca468SChris Mason } 2803e02119d5SChris Mason blocksize = 2804e02119d5SChris Mason btrfs_level_size(tree_root, 2805e02119d5SChris Mason btrfs_super_log_root_level(disk_super)); 2806e02119d5SChris Mason 28076f07e42eSAl Viro log_tree_root = btrfs_alloc_root(fs_info); 2808676e4c86SDan Carpenter if (!log_tree_root) { 2809676e4c86SDan Carpenter err = -ENOMEM; 2810bcef60f2SArne Jansen goto fail_qgroup; 2811676e4c86SDan Carpenter } 2812e02119d5SChris Mason 2813e02119d5SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 2814e02119d5SChris Mason log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); 2815e02119d5SChris Mason 2816e02119d5SChris Mason log_tree_root->node = read_tree_block(tree_root, bytenr, 281784234f3aSYan Zheng blocksize, 281884234f3aSYan Zheng generation + 1); 2819416bc658SJosef Bacik if (!log_tree_root->node || 2820416bc658SJosef Bacik !extent_buffer_uptodate(log_tree_root->node)) { 2821416bc658SJosef Bacik printk(KERN_ERR "btrfs: failed to read log tree\n"); 2822416bc658SJosef Bacik free_extent_buffer(log_tree_root->node); 2823416bc658SJosef Bacik kfree(log_tree_root); 2824416bc658SJosef Bacik goto fail_trans_kthread; 2825416bc658SJosef Bacik } 282679787eaaSJeff Mahoney /* returns with log_tree_root freed on success */ 2827e02119d5SChris Mason ret = btrfs_recover_log_trees(log_tree_root); 282879787eaaSJeff Mahoney if (ret) { 282979787eaaSJeff Mahoney btrfs_error(tree_root->fs_info, ret, 283079787eaaSJeff Mahoney "Failed to recover log tree"); 283179787eaaSJeff Mahoney free_extent_buffer(log_tree_root->node); 283279787eaaSJeff Mahoney kfree(log_tree_root); 283379787eaaSJeff Mahoney goto fail_trans_kthread; 283479787eaaSJeff Mahoney } 2835e556ce2cSYan Zheng 2836e556ce2cSYan Zheng if (sb->s_flags & MS_RDONLY) { 2837e556ce2cSYan Zheng ret = btrfs_commit_super(tree_root); 283879787eaaSJeff Mahoney if (ret) 283979787eaaSJeff Mahoney goto fail_trans_kthread; 2840e556ce2cSYan Zheng } 2841e02119d5SChris Mason } 28421a40e23bSZheng Yan 284376dda93cSYan, Zheng ret = btrfs_find_orphan_roots(tree_root); 284479787eaaSJeff Mahoney if (ret) 284579787eaaSJeff Mahoney goto fail_trans_kthread; 284676dda93cSYan, Zheng 28477c2ca468SChris Mason if (!(sb->s_flags & MS_RDONLY)) { 2848d68fc57bSYan, Zheng ret = btrfs_cleanup_fs_roots(fs_info); 284944c44af2SIlya Dryomov if (ret) 285044c44af2SIlya Dryomov goto fail_trans_kthread; 2851d68fc57bSYan, Zheng 28525d4f98a2SYan Zheng ret = btrfs_recover_relocation(tree_root); 2853d7ce5843SMiao Xie if (ret < 0) { 2854d7ce5843SMiao Xie printk(KERN_WARNING 2855d7ce5843SMiao Xie "btrfs: failed to recover relocation\n"); 2856d7ce5843SMiao Xie err = -EINVAL; 2857bcef60f2SArne Jansen goto fail_qgroup; 2858d7ce5843SMiao Xie } 28597c2ca468SChris Mason } 28601a40e23bSZheng Yan 28613de4586cSChris Mason location.objectid = BTRFS_FS_TREE_OBJECTID; 28623de4586cSChris Mason location.type = BTRFS_ROOT_ITEM_KEY; 2863cb517eabSMiao Xie location.offset = 0; 28643de4586cSChris Mason 28653de4586cSChris Mason fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); 28663140c9a3SDan Carpenter if (IS_ERR(fs_info->fs_root)) { 28673140c9a3SDan Carpenter err = PTR_ERR(fs_info->fs_root); 2868bcef60f2SArne Jansen goto fail_qgroup; 28693140c9a3SDan Carpenter } 2870c289811cSChris Mason 28712b6ba629SIlya Dryomov if (sb->s_flags & MS_RDONLY) 28722b6ba629SIlya Dryomov return 0; 28732b6ba629SIlya Dryomov 2874e3acc2a6SJosef Bacik down_read(&fs_info->cleanup_work_sem); 28752b6ba629SIlya Dryomov if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || 28762b6ba629SIlya Dryomov (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { 28772b6ba629SIlya Dryomov up_read(&fs_info->cleanup_work_sem); 28782b6ba629SIlya Dryomov close_ctree(tree_root); 28792b6ba629SIlya Dryomov return ret; 28802b6ba629SIlya Dryomov } 2881e3acc2a6SJosef Bacik up_read(&fs_info->cleanup_work_sem); 288259641015SIlya Dryomov 28832b6ba629SIlya Dryomov ret = btrfs_resume_balance_async(fs_info); 28842b6ba629SIlya Dryomov if (ret) { 28852b6ba629SIlya Dryomov printk(KERN_WARNING "btrfs: failed to resume balance\n"); 288666b4ffd1SJosef Bacik close_ctree(tree_root); 28872b6ba629SIlya Dryomov return ret; 2888e3acc2a6SJosef Bacik } 2889e3acc2a6SJosef Bacik 28908dabb742SStefan Behrens ret = btrfs_resume_dev_replace_async(fs_info); 28918dabb742SStefan Behrens if (ret) { 28928dabb742SStefan Behrens pr_warn("btrfs: failed to resume dev_replace\n"); 28938dabb742SStefan Behrens close_ctree(tree_root); 28948dabb742SStefan Behrens return ret; 28958dabb742SStefan Behrens } 28968dabb742SStefan Behrens 2897b382a324SJan Schmidt btrfs_qgroup_rescan_resume(fs_info); 2898b382a324SJan Schmidt 2899f7a81ea4SStefan Behrens if (create_uuid_tree) { 2900f7a81ea4SStefan Behrens pr_info("btrfs: creating UUID tree\n"); 2901f7a81ea4SStefan Behrens ret = btrfs_create_uuid_tree(fs_info); 2902f7a81ea4SStefan Behrens if (ret) { 2903f7a81ea4SStefan Behrens pr_warn("btrfs: failed to create the UUID tree %d\n", 2904f7a81ea4SStefan Behrens ret); 2905f7a81ea4SStefan Behrens close_ctree(tree_root); 2906f7a81ea4SStefan Behrens return ret; 2907f7a81ea4SStefan Behrens } 2908f420ee1eSStefan Behrens } else if (check_uuid_tree || 2909f420ee1eSStefan Behrens btrfs_test_opt(tree_root, RESCAN_UUID_TREE)) { 291070f80175SStefan Behrens pr_info("btrfs: checking UUID tree\n"); 291170f80175SStefan Behrens ret = btrfs_check_uuid_tree(fs_info); 291270f80175SStefan Behrens if (ret) { 291370f80175SStefan Behrens pr_warn("btrfs: failed to check the UUID tree %d\n", 291470f80175SStefan Behrens ret); 291570f80175SStefan Behrens close_ctree(tree_root); 291670f80175SStefan Behrens return ret; 291770f80175SStefan Behrens } 291870f80175SStefan Behrens } else { 291970f80175SStefan Behrens fs_info->update_uuid_tree_gen = 1; 2920f7a81ea4SStefan Behrens } 2921f7a81ea4SStefan Behrens 2922ad2b2c80SAl Viro return 0; 292339279cc3SChris Mason 2924bcef60f2SArne Jansen fail_qgroup: 2925bcef60f2SArne Jansen btrfs_free_qgroup_config(fs_info); 29267c2ca468SChris Mason fail_trans_kthread: 29277c2ca468SChris Mason kthread_stop(fs_info->transaction_kthread); 292854067ae9SJosef Bacik btrfs_cleanup_transaction(fs_info->tree_root); 29297b5ff90eSJosef Bacik del_fs_roots(fs_info); 29303f157a2fSChris Mason fail_cleaner: 2931a74a4b97SChris Mason kthread_stop(fs_info->cleaner_kthread); 29327c2ca468SChris Mason 29337c2ca468SChris Mason /* 29347c2ca468SChris Mason * make sure we're done with the btree inode before we stop our 29357c2ca468SChris Mason * kthreads 29367c2ca468SChris Mason */ 29377c2ca468SChris Mason filemap_write_and_wait(fs_info->btree_inode->i_mapping); 29387c2ca468SChris Mason 29391b1d1f66SJosef Bacik fail_block_groups: 294054067ae9SJosef Bacik btrfs_put_block_group_cache(fs_info); 29411b1d1f66SJosef Bacik btrfs_free_block_groups(fs_info); 2942af31f5e5SChris Mason 2943af31f5e5SChris Mason fail_tree_roots: 2944af31f5e5SChris Mason free_root_pointers(fs_info, 1); 29452b8195bbSMiao Xie invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 2946af31f5e5SChris Mason 294739279cc3SChris Mason fail_sb_buffer: 29487abadb64SLiu Bo btrfs_stop_all_workers(fs_info); 294916cdcec7SMiao Xie fail_alloc: 29504543df7eSChris Mason fail_iput: 2951586e46e2SIlya Dryomov btrfs_mapping_tree_free(&fs_info->mapping_tree); 2952586e46e2SIlya Dryomov 29534543df7eSChris Mason iput(fs_info->btree_inode); 2954963d678bSMiao Xie fail_delalloc_bytes: 2955963d678bSMiao Xie percpu_counter_destroy(&fs_info->delalloc_bytes); 2956e2d84521SMiao Xie fail_dirty_metadata_bytes: 2957e2d84521SMiao Xie percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 2958ad081f14SJens Axboe fail_bdi: 29597e662854SQinghuang Feng bdi_destroy(&fs_info->bdi); 296076dda93cSYan, Zheng fail_srcu: 296176dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 29627e662854SQinghuang Feng fail: 296353b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 2964586e46e2SIlya Dryomov btrfs_close_devices(fs_info->fs_devices); 2965ad2b2c80SAl Viro return err; 2966af31f5e5SChris Mason 2967af31f5e5SChris Mason recovery_tree_root: 2968af31f5e5SChris Mason if (!btrfs_test_opt(tree_root, RECOVERY)) 2969af31f5e5SChris Mason goto fail_tree_roots; 2970af31f5e5SChris Mason 2971af31f5e5SChris Mason free_root_pointers(fs_info, 0); 2972af31f5e5SChris Mason 2973af31f5e5SChris Mason /* don't use the log in recovery mode, it won't be valid */ 2974af31f5e5SChris Mason btrfs_set_super_log_root(disk_super, 0); 2975af31f5e5SChris Mason 2976af31f5e5SChris Mason /* we can't trust the free space cache either */ 2977af31f5e5SChris Mason btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); 2978af31f5e5SChris Mason 2979af31f5e5SChris Mason ret = next_root_backup(fs_info, fs_info->super_copy, 2980af31f5e5SChris Mason &num_backups_tried, &backup_index); 2981af31f5e5SChris Mason if (ret == -1) 2982af31f5e5SChris Mason goto fail_block_groups; 2983af31f5e5SChris Mason goto retry_root_backup; 2984eb60ceacSChris Mason } 2985eb60ceacSChris Mason 2986f2984462SChris Mason static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) 2987f2984462SChris Mason { 2988f2984462SChris Mason if (uptodate) { 2989f2984462SChris Mason set_buffer_uptodate(bh); 2990f2984462SChris Mason } else { 2991442a4f63SStefan Behrens struct btrfs_device *device = (struct btrfs_device *) 2992442a4f63SStefan Behrens bh->b_private; 2993442a4f63SStefan Behrens 2994606686eeSJosef Bacik printk_ratelimited_in_rcu(KERN_WARNING "lost page write due to " 2995606686eeSJosef Bacik "I/O error on %s\n", 2996606686eeSJosef Bacik rcu_str_deref(device->name)); 29971259ab75SChris Mason /* note, we dont' set_buffer_write_io_error because we have 29981259ab75SChris Mason * our own ways of dealing with the IO errors 29991259ab75SChris Mason */ 3000f2984462SChris Mason clear_buffer_uptodate(bh); 3001442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); 3002f2984462SChris Mason } 3003f2984462SChris Mason unlock_buffer(bh); 3004f2984462SChris Mason put_bh(bh); 3005f2984462SChris Mason } 3006f2984462SChris Mason 3007a512bbf8SYan Zheng struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) 3008a512bbf8SYan Zheng { 3009a512bbf8SYan Zheng struct buffer_head *bh; 3010a512bbf8SYan Zheng struct buffer_head *latest = NULL; 3011a512bbf8SYan Zheng struct btrfs_super_block *super; 3012a512bbf8SYan Zheng int i; 3013a512bbf8SYan Zheng u64 transid = 0; 3014a512bbf8SYan Zheng u64 bytenr; 3015a512bbf8SYan Zheng 3016a512bbf8SYan Zheng /* we would like to check all the supers, but that would make 3017a512bbf8SYan Zheng * a btrfs mount succeed after a mkfs from a different FS. 3018a512bbf8SYan Zheng * So, we need to add a special mount option to scan for 3019a512bbf8SYan Zheng * later supers, using BTRFS_SUPER_MIRROR_MAX instead 3020a512bbf8SYan Zheng */ 3021a512bbf8SYan Zheng for (i = 0; i < 1; i++) { 3022a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 30238068a47eSAnand Jain if (bytenr + BTRFS_SUPER_INFO_SIZE >= 30248068a47eSAnand Jain i_size_read(bdev->bd_inode)) 3025a512bbf8SYan Zheng break; 30268068a47eSAnand Jain bh = __bread(bdev, bytenr / 4096, 30278068a47eSAnand Jain BTRFS_SUPER_INFO_SIZE); 3028a512bbf8SYan Zheng if (!bh) 3029a512bbf8SYan Zheng continue; 3030a512bbf8SYan Zheng 3031a512bbf8SYan Zheng super = (struct btrfs_super_block *)bh->b_data; 3032a512bbf8SYan Zheng if (btrfs_super_bytenr(super) != bytenr || 30333cae210fSQu Wenruo btrfs_super_magic(super) != BTRFS_MAGIC) { 3034a512bbf8SYan Zheng brelse(bh); 3035a512bbf8SYan Zheng continue; 3036a512bbf8SYan Zheng } 3037a512bbf8SYan Zheng 3038a512bbf8SYan Zheng if (!latest || btrfs_super_generation(super) > transid) { 3039a512bbf8SYan Zheng brelse(latest); 3040a512bbf8SYan Zheng latest = bh; 3041a512bbf8SYan Zheng transid = btrfs_super_generation(super); 3042a512bbf8SYan Zheng } else { 3043a512bbf8SYan Zheng brelse(bh); 3044a512bbf8SYan Zheng } 3045a512bbf8SYan Zheng } 3046a512bbf8SYan Zheng return latest; 3047a512bbf8SYan Zheng } 3048a512bbf8SYan Zheng 30494eedeb75SHisashi Hifumi /* 30504eedeb75SHisashi Hifumi * this should be called twice, once with wait == 0 and 30514eedeb75SHisashi Hifumi * once with wait == 1. When wait == 0 is done, all the buffer heads 30524eedeb75SHisashi Hifumi * we write are pinned. 30534eedeb75SHisashi Hifumi * 30544eedeb75SHisashi Hifumi * They are released when wait == 1 is done. 30554eedeb75SHisashi Hifumi * max_mirrors must be the same for both runs, and it indicates how 30564eedeb75SHisashi Hifumi * many supers on this one device should be written. 30574eedeb75SHisashi Hifumi * 30584eedeb75SHisashi Hifumi * max_mirrors == 0 means to write them all. 30594eedeb75SHisashi Hifumi */ 3060a512bbf8SYan Zheng static int write_dev_supers(struct btrfs_device *device, 3061a512bbf8SYan Zheng struct btrfs_super_block *sb, 3062a512bbf8SYan Zheng int do_barriers, int wait, int max_mirrors) 3063a512bbf8SYan Zheng { 3064a512bbf8SYan Zheng struct buffer_head *bh; 3065a512bbf8SYan Zheng int i; 3066a512bbf8SYan Zheng int ret; 3067a512bbf8SYan Zheng int errors = 0; 3068a512bbf8SYan Zheng u32 crc; 3069a512bbf8SYan Zheng u64 bytenr; 3070a512bbf8SYan Zheng 3071a512bbf8SYan Zheng if (max_mirrors == 0) 3072a512bbf8SYan Zheng max_mirrors = BTRFS_SUPER_MIRROR_MAX; 3073a512bbf8SYan Zheng 3074a512bbf8SYan Zheng for (i = 0; i < max_mirrors; i++) { 3075a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 3076a512bbf8SYan Zheng if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes) 3077a512bbf8SYan Zheng break; 3078a512bbf8SYan Zheng 3079a512bbf8SYan Zheng if (wait) { 3080a512bbf8SYan Zheng bh = __find_get_block(device->bdev, bytenr / 4096, 3081a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 3082634554dcSJosef Bacik if (!bh) { 3083634554dcSJosef Bacik errors++; 3084634554dcSJosef Bacik continue; 3085634554dcSJosef Bacik } 3086a512bbf8SYan Zheng wait_on_buffer(bh); 30874eedeb75SHisashi Hifumi if (!buffer_uptodate(bh)) 30884eedeb75SHisashi Hifumi errors++; 30894eedeb75SHisashi Hifumi 30904eedeb75SHisashi Hifumi /* drop our reference */ 30914eedeb75SHisashi Hifumi brelse(bh); 30924eedeb75SHisashi Hifumi 30934eedeb75SHisashi Hifumi /* drop the reference from the wait == 0 run */ 3094a512bbf8SYan Zheng brelse(bh); 3095a512bbf8SYan Zheng continue; 3096a512bbf8SYan Zheng } else { 3097a512bbf8SYan Zheng btrfs_set_super_bytenr(sb, bytenr); 3098a512bbf8SYan Zheng 3099a512bbf8SYan Zheng crc = ~(u32)0; 3100b0496686SLiu Bo crc = btrfs_csum_data((char *)sb + 3101a512bbf8SYan Zheng BTRFS_CSUM_SIZE, crc, 3102a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE - 3103a512bbf8SYan Zheng BTRFS_CSUM_SIZE); 3104a512bbf8SYan Zheng btrfs_csum_final(crc, sb->csum); 3105a512bbf8SYan Zheng 31064eedeb75SHisashi Hifumi /* 31074eedeb75SHisashi Hifumi * one reference for us, and we leave it for the 31084eedeb75SHisashi Hifumi * caller 31094eedeb75SHisashi Hifumi */ 3110a512bbf8SYan Zheng bh = __getblk(device->bdev, bytenr / 4096, 3111a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 3112634554dcSJosef Bacik if (!bh) { 3113634554dcSJosef Bacik printk(KERN_ERR "btrfs: couldn't get super " 3114634554dcSJosef Bacik "buffer head for bytenr %Lu\n", bytenr); 3115634554dcSJosef Bacik errors++; 3116634554dcSJosef Bacik continue; 3117634554dcSJosef Bacik } 3118634554dcSJosef Bacik 3119a512bbf8SYan Zheng memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); 3120a512bbf8SYan Zheng 31214eedeb75SHisashi Hifumi /* one reference for submit_bh */ 3122a512bbf8SYan Zheng get_bh(bh); 31234eedeb75SHisashi Hifumi 31244eedeb75SHisashi Hifumi set_buffer_uptodate(bh); 3125a512bbf8SYan Zheng lock_buffer(bh); 3126a512bbf8SYan Zheng bh->b_end_io = btrfs_end_buffer_write_sync; 3127442a4f63SStefan Behrens bh->b_private = device; 3128a512bbf8SYan Zheng } 3129a512bbf8SYan Zheng 3130387125fcSChris Mason /* 3131387125fcSChris Mason * we fua the first super. The others we allow 3132387125fcSChris Mason * to go down lazy. 3133387125fcSChris Mason */ 313421adbd5cSStefan Behrens ret = btrfsic_submit_bh(WRITE_FUA, bh); 31354eedeb75SHisashi Hifumi if (ret) 3136a512bbf8SYan Zheng errors++; 3137a512bbf8SYan Zheng } 3138a512bbf8SYan Zheng return errors < i ? 0 : -1; 3139a512bbf8SYan Zheng } 3140a512bbf8SYan Zheng 3141387125fcSChris Mason /* 3142387125fcSChris Mason * endio for the write_dev_flush, this will wake anyone waiting 3143387125fcSChris Mason * for the barrier when it is done 3144387125fcSChris Mason */ 3145387125fcSChris Mason static void btrfs_end_empty_barrier(struct bio *bio, int err) 3146387125fcSChris Mason { 3147387125fcSChris Mason if (err) { 3148387125fcSChris Mason if (err == -EOPNOTSUPP) 3149387125fcSChris Mason set_bit(BIO_EOPNOTSUPP, &bio->bi_flags); 3150387125fcSChris Mason clear_bit(BIO_UPTODATE, &bio->bi_flags); 3151387125fcSChris Mason } 3152387125fcSChris Mason if (bio->bi_private) 3153387125fcSChris Mason complete(bio->bi_private); 3154387125fcSChris Mason bio_put(bio); 3155387125fcSChris Mason } 3156387125fcSChris Mason 3157387125fcSChris Mason /* 3158387125fcSChris Mason * trigger flushes for one the devices. If you pass wait == 0, the flushes are 3159387125fcSChris Mason * sent down. With wait == 1, it waits for the previous flush. 3160387125fcSChris Mason * 3161387125fcSChris Mason * any device where the flush fails with eopnotsupp are flagged as not-barrier 3162387125fcSChris Mason * capable 3163387125fcSChris Mason */ 3164387125fcSChris Mason static int write_dev_flush(struct btrfs_device *device, int wait) 3165387125fcSChris Mason { 3166387125fcSChris Mason struct bio *bio; 3167387125fcSChris Mason int ret = 0; 3168387125fcSChris Mason 3169387125fcSChris Mason if (device->nobarriers) 3170387125fcSChris Mason return 0; 3171387125fcSChris Mason 3172387125fcSChris Mason if (wait) { 3173387125fcSChris Mason bio = device->flush_bio; 3174387125fcSChris Mason if (!bio) 3175387125fcSChris Mason return 0; 3176387125fcSChris Mason 3177387125fcSChris Mason wait_for_completion(&device->flush_wait); 3178387125fcSChris Mason 3179387125fcSChris Mason if (bio_flagged(bio, BIO_EOPNOTSUPP)) { 3180606686eeSJosef Bacik printk_in_rcu("btrfs: disabling barriers on dev %s\n", 3181606686eeSJosef Bacik rcu_str_deref(device->name)); 3182387125fcSChris Mason device->nobarriers = 1; 31835af3e8ccSStefan Behrens } else if (!bio_flagged(bio, BIO_UPTODATE)) { 3184387125fcSChris Mason ret = -EIO; 3185442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, 3186442a4f63SStefan Behrens BTRFS_DEV_STAT_FLUSH_ERRS); 3187387125fcSChris Mason } 3188387125fcSChris Mason 3189387125fcSChris Mason /* drop the reference from the wait == 0 run */ 3190387125fcSChris Mason bio_put(bio); 3191387125fcSChris Mason device->flush_bio = NULL; 3192387125fcSChris Mason 3193387125fcSChris Mason return ret; 3194387125fcSChris Mason } 3195387125fcSChris Mason 3196387125fcSChris Mason /* 3197387125fcSChris Mason * one reference for us, and we leave it for the 3198387125fcSChris Mason * caller 3199387125fcSChris Mason */ 32009c017abcSJesper Juhl device->flush_bio = NULL; 32019be3395bSChris Mason bio = btrfs_io_bio_alloc(GFP_NOFS, 0); 3202387125fcSChris Mason if (!bio) 3203387125fcSChris Mason return -ENOMEM; 3204387125fcSChris Mason 3205387125fcSChris Mason bio->bi_end_io = btrfs_end_empty_barrier; 3206387125fcSChris Mason bio->bi_bdev = device->bdev; 3207387125fcSChris Mason init_completion(&device->flush_wait); 3208387125fcSChris Mason bio->bi_private = &device->flush_wait; 3209387125fcSChris Mason device->flush_bio = bio; 3210387125fcSChris Mason 3211387125fcSChris Mason bio_get(bio); 321221adbd5cSStefan Behrens btrfsic_submit_bio(WRITE_FLUSH, bio); 3213387125fcSChris Mason 3214387125fcSChris Mason return 0; 3215387125fcSChris Mason } 3216387125fcSChris Mason 3217387125fcSChris Mason /* 3218387125fcSChris Mason * send an empty flush down to each device in parallel, 3219387125fcSChris Mason * then wait for them 3220387125fcSChris Mason */ 3221387125fcSChris Mason static int barrier_all_devices(struct btrfs_fs_info *info) 3222387125fcSChris Mason { 3223387125fcSChris Mason struct list_head *head; 3224387125fcSChris Mason struct btrfs_device *dev; 32255af3e8ccSStefan Behrens int errors_send = 0; 32265af3e8ccSStefan Behrens int errors_wait = 0; 3227387125fcSChris Mason int ret; 3228387125fcSChris Mason 3229387125fcSChris Mason /* send down all the barriers */ 3230387125fcSChris Mason head = &info->fs_devices->devices; 3231387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3232387125fcSChris Mason if (!dev->bdev) { 32335af3e8ccSStefan Behrens errors_send++; 3234387125fcSChris Mason continue; 3235387125fcSChris Mason } 3236387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3237387125fcSChris Mason continue; 3238387125fcSChris Mason 3239387125fcSChris Mason ret = write_dev_flush(dev, 0); 3240387125fcSChris Mason if (ret) 32415af3e8ccSStefan Behrens errors_send++; 3242387125fcSChris Mason } 3243387125fcSChris Mason 3244387125fcSChris Mason /* wait for all the barriers */ 3245387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3246387125fcSChris Mason if (!dev->bdev) { 32475af3e8ccSStefan Behrens errors_wait++; 3248387125fcSChris Mason continue; 3249387125fcSChris Mason } 3250387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3251387125fcSChris Mason continue; 3252387125fcSChris Mason 3253387125fcSChris Mason ret = write_dev_flush(dev, 1); 3254387125fcSChris Mason if (ret) 32555af3e8ccSStefan Behrens errors_wait++; 3256387125fcSChris Mason } 32575af3e8ccSStefan Behrens if (errors_send > info->num_tolerated_disk_barrier_failures || 32585af3e8ccSStefan Behrens errors_wait > info->num_tolerated_disk_barrier_failures) 3259387125fcSChris Mason return -EIO; 3260387125fcSChris Mason return 0; 3261387125fcSChris Mason } 3262387125fcSChris Mason 32635af3e8ccSStefan Behrens int btrfs_calc_num_tolerated_disk_barrier_failures( 32645af3e8ccSStefan Behrens struct btrfs_fs_info *fs_info) 32655af3e8ccSStefan Behrens { 32665af3e8ccSStefan Behrens struct btrfs_ioctl_space_info space; 32675af3e8ccSStefan Behrens struct btrfs_space_info *sinfo; 32685af3e8ccSStefan Behrens u64 types[] = {BTRFS_BLOCK_GROUP_DATA, 32695af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_SYSTEM, 32705af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_METADATA, 32715af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; 32725af3e8ccSStefan Behrens int num_types = 4; 32735af3e8ccSStefan Behrens int i; 32745af3e8ccSStefan Behrens int c; 32755af3e8ccSStefan Behrens int num_tolerated_disk_barrier_failures = 32765af3e8ccSStefan Behrens (int)fs_info->fs_devices->num_devices; 32775af3e8ccSStefan Behrens 32785af3e8ccSStefan Behrens for (i = 0; i < num_types; i++) { 32795af3e8ccSStefan Behrens struct btrfs_space_info *tmp; 32805af3e8ccSStefan Behrens 32815af3e8ccSStefan Behrens sinfo = NULL; 32825af3e8ccSStefan Behrens rcu_read_lock(); 32835af3e8ccSStefan Behrens list_for_each_entry_rcu(tmp, &fs_info->space_info, list) { 32845af3e8ccSStefan Behrens if (tmp->flags == types[i]) { 32855af3e8ccSStefan Behrens sinfo = tmp; 32865af3e8ccSStefan Behrens break; 32875af3e8ccSStefan Behrens } 32885af3e8ccSStefan Behrens } 32895af3e8ccSStefan Behrens rcu_read_unlock(); 32905af3e8ccSStefan Behrens 32915af3e8ccSStefan Behrens if (!sinfo) 32925af3e8ccSStefan Behrens continue; 32935af3e8ccSStefan Behrens 32945af3e8ccSStefan Behrens down_read(&sinfo->groups_sem); 32955af3e8ccSStefan Behrens for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { 32965af3e8ccSStefan Behrens if (!list_empty(&sinfo->block_groups[c])) { 32975af3e8ccSStefan Behrens u64 flags; 32985af3e8ccSStefan Behrens 32995af3e8ccSStefan Behrens btrfs_get_block_group_info( 33005af3e8ccSStefan Behrens &sinfo->block_groups[c], &space); 33015af3e8ccSStefan Behrens if (space.total_bytes == 0 || 33025af3e8ccSStefan Behrens space.used_bytes == 0) 33035af3e8ccSStefan Behrens continue; 33045af3e8ccSStefan Behrens flags = space.flags; 33055af3e8ccSStefan Behrens /* 33065af3e8ccSStefan Behrens * return 33075af3e8ccSStefan Behrens * 0: if dup, single or RAID0 is configured for 33085af3e8ccSStefan Behrens * any of metadata, system or data, else 33095af3e8ccSStefan Behrens * 1: if RAID5 is configured, or if RAID1 or 33105af3e8ccSStefan Behrens * RAID10 is configured and only two mirrors 33115af3e8ccSStefan Behrens * are used, else 33125af3e8ccSStefan Behrens * 2: if RAID6 is configured, else 33135af3e8ccSStefan Behrens * num_mirrors - 1: if RAID1 or RAID10 is 33145af3e8ccSStefan Behrens * configured and more than 33155af3e8ccSStefan Behrens * 2 mirrors are used. 33165af3e8ccSStefan Behrens */ 33175af3e8ccSStefan Behrens if (num_tolerated_disk_barrier_failures > 0 && 33185af3e8ccSStefan Behrens ((flags & (BTRFS_BLOCK_GROUP_DUP | 33195af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_RAID0)) || 33205af3e8ccSStefan Behrens ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) 33215af3e8ccSStefan Behrens == 0))) 33225af3e8ccSStefan Behrens num_tolerated_disk_barrier_failures = 0; 332353b381b3SDavid Woodhouse else if (num_tolerated_disk_barrier_failures > 1) { 332453b381b3SDavid Woodhouse if (flags & (BTRFS_BLOCK_GROUP_RAID1 | 332553b381b3SDavid Woodhouse BTRFS_BLOCK_GROUP_RAID5 | 332653b381b3SDavid Woodhouse BTRFS_BLOCK_GROUP_RAID10)) { 33275af3e8ccSStefan Behrens num_tolerated_disk_barrier_failures = 1; 332853b381b3SDavid Woodhouse } else if (flags & 332915b0a89dSHenrik Nordvik BTRFS_BLOCK_GROUP_RAID6) { 333053b381b3SDavid Woodhouse num_tolerated_disk_barrier_failures = 2; 333153b381b3SDavid Woodhouse } 333253b381b3SDavid Woodhouse } 33335af3e8ccSStefan Behrens } 33345af3e8ccSStefan Behrens } 33355af3e8ccSStefan Behrens up_read(&sinfo->groups_sem); 33365af3e8ccSStefan Behrens } 33375af3e8ccSStefan Behrens 33385af3e8ccSStefan Behrens return num_tolerated_disk_barrier_failures; 33395af3e8ccSStefan Behrens } 33405af3e8ccSStefan Behrens 334148a3b636SEric Sandeen static int write_all_supers(struct btrfs_root *root, int max_mirrors) 3342f2984462SChris Mason { 3343e5e9a520SChris Mason struct list_head *head; 3344f2984462SChris Mason struct btrfs_device *dev; 3345a061fc8dSChris Mason struct btrfs_super_block *sb; 3346f2984462SChris Mason struct btrfs_dev_item *dev_item; 3347f2984462SChris Mason int ret; 3348f2984462SChris Mason int do_barriers; 3349a236aed1SChris Mason int max_errors; 3350a236aed1SChris Mason int total_errors = 0; 3351a061fc8dSChris Mason u64 flags; 3352f2984462SChris Mason 3353f2984462SChris Mason do_barriers = !btrfs_test_opt(root, NOBARRIER); 3354af31f5e5SChris Mason backup_super_roots(root->fs_info); 3355f2984462SChris Mason 33566c41761fSDavid Sterba sb = root->fs_info->super_for_commit; 3357a061fc8dSChris Mason dev_item = &sb->dev_item; 3358e5e9a520SChris Mason 3359174ba509SChris Mason mutex_lock(&root->fs_info->fs_devices->device_list_mutex); 3360e5e9a520SChris Mason head = &root->fs_info->fs_devices->devices; 3361d7306801SFilipe David Borba Manana max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; 3362387125fcSChris Mason 33635af3e8ccSStefan Behrens if (do_barriers) { 33645af3e8ccSStefan Behrens ret = barrier_all_devices(root->fs_info); 33655af3e8ccSStefan Behrens if (ret) { 33665af3e8ccSStefan Behrens mutex_unlock( 33675af3e8ccSStefan Behrens &root->fs_info->fs_devices->device_list_mutex); 33685af3e8ccSStefan Behrens btrfs_error(root->fs_info, ret, 33695af3e8ccSStefan Behrens "errors while submitting device barriers."); 33705af3e8ccSStefan Behrens return ret; 33715af3e8ccSStefan Behrens } 33725af3e8ccSStefan Behrens } 3373387125fcSChris Mason 33741f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3375dfe25020SChris Mason if (!dev->bdev) { 3376dfe25020SChris Mason total_errors++; 3377dfe25020SChris Mason continue; 3378dfe25020SChris Mason } 33792b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3380dfe25020SChris Mason continue; 3381dfe25020SChris Mason 33822b82032cSYan Zheng btrfs_set_stack_device_generation(dev_item, 0); 3383a061fc8dSChris Mason btrfs_set_stack_device_type(dev_item, dev->type); 3384a061fc8dSChris Mason btrfs_set_stack_device_id(dev_item, dev->devid); 3385a061fc8dSChris Mason btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes); 3386a061fc8dSChris Mason btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used); 3387a061fc8dSChris Mason btrfs_set_stack_device_io_align(dev_item, dev->io_align); 3388a061fc8dSChris Mason btrfs_set_stack_device_io_width(dev_item, dev->io_width); 3389a061fc8dSChris Mason btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); 3390a061fc8dSChris Mason memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); 33912b82032cSYan Zheng memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); 3392a512bbf8SYan Zheng 3393a061fc8dSChris Mason flags = btrfs_super_flags(sb); 3394a061fc8dSChris Mason btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); 3395f2984462SChris Mason 3396a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); 3397a236aed1SChris Mason if (ret) 3398a236aed1SChris Mason total_errors++; 3399f2984462SChris Mason } 3400a236aed1SChris Mason if (total_errors > max_errors) { 3401d397712bSChris Mason printk(KERN_ERR "btrfs: %d errors while writing supers\n", 3402d397712bSChris Mason total_errors); 3403a724b436SStefan Behrens mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 340479787eaaSJeff Mahoney 34059d565ba4SStefan Behrens /* FUA is masked off if unsupported and can't be the reason */ 34069d565ba4SStefan Behrens btrfs_error(root->fs_info, -EIO, 34079d565ba4SStefan Behrens "%d errors while writing supers", total_errors); 34089d565ba4SStefan Behrens return -EIO; 3409a236aed1SChris Mason } 3410f2984462SChris Mason 3411a512bbf8SYan Zheng total_errors = 0; 34121f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3413dfe25020SChris Mason if (!dev->bdev) 3414dfe25020SChris Mason continue; 34152b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3416dfe25020SChris Mason continue; 3417dfe25020SChris Mason 3418a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); 3419a512bbf8SYan Zheng if (ret) 34201259ab75SChris Mason total_errors++; 3421f2984462SChris Mason } 3422174ba509SChris Mason mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 3423a236aed1SChris Mason if (total_errors > max_errors) { 342479787eaaSJeff Mahoney btrfs_error(root->fs_info, -EIO, 342579787eaaSJeff Mahoney "%d errors while writing supers", total_errors); 342679787eaaSJeff Mahoney return -EIO; 3427a236aed1SChris Mason } 3428f2984462SChris Mason return 0; 3429f2984462SChris Mason } 3430f2984462SChris Mason 3431a512bbf8SYan Zheng int write_ctree_super(struct btrfs_trans_handle *trans, 3432a512bbf8SYan Zheng struct btrfs_root *root, int max_mirrors) 3433cfaa7295SChris Mason { 3434f570e757SRashika return write_all_supers(root, max_mirrors); 3435cfaa7295SChris Mason } 3436cfaa7295SChris Mason 3437cb517eabSMiao Xie /* Drop a fs root from the radix tree and free it. */ 3438cb517eabSMiao Xie void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, 3439cb517eabSMiao Xie struct btrfs_root *root) 34402619ba1fSChris Mason { 34414df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 34422619ba1fSChris Mason radix_tree_delete(&fs_info->fs_roots_radix, 34432619ba1fSChris Mason (unsigned long)root->root_key.objectid); 34444df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 344576dda93cSYan, Zheng 344676dda93cSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) 344776dda93cSYan, Zheng synchronize_srcu(&fs_info->subvol_srcu); 344876dda93cSYan, Zheng 3449d7634482SLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { 34503321719eSLiu Bo btrfs_free_log(NULL, root); 34513321719eSLiu Bo btrfs_free_log_root_tree(NULL, fs_info); 34523321719eSLiu Bo } 34533321719eSLiu Bo 3454581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_pinned); 3455581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_ctl); 34564df27c4dSYan, Zheng free_fs_root(root); 34574df27c4dSYan, Zheng } 34584df27c4dSYan, Zheng 34594df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root) 34604df27c4dSYan, Zheng { 346182d5902dSLi Zefan iput(root->cache_inode); 34624df27c4dSYan, Zheng WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); 34631cb048f5SFilipe David Borba Manana btrfs_free_block_rsv(root, root->orphan_block_rsv); 34641cb048f5SFilipe David Borba Manana root->orphan_block_rsv = NULL; 34650ee5dc67SAl Viro if (root->anon_dev) 34660ee5dc67SAl Viro free_anon_bdev(root->anon_dev); 34675f39d397SChris Mason free_extent_buffer(root->node); 34685f39d397SChris Mason free_extent_buffer(root->commit_root); 3469581bb050SLi Zefan kfree(root->free_ino_ctl); 3470581bb050SLi Zefan kfree(root->free_ino_pinned); 347158176a96SJosef Bacik kfree(root->name); 3472b0feb9d9SMiao Xie btrfs_put_fs_root(root); 34732619ba1fSChris Mason } 34742619ba1fSChris Mason 3475cb517eabSMiao Xie void btrfs_free_fs_root(struct btrfs_root *root) 3476cb517eabSMiao Xie { 3477cb517eabSMiao Xie free_fs_root(root); 3478eb60ceacSChris Mason } 3479eb60ceacSChris Mason 3480c146afadSYan Zheng int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) 3481c146afadSYan Zheng { 3482c146afadSYan Zheng u64 root_objectid = 0; 3483c146afadSYan Zheng struct btrfs_root *gang[8]; 3484c146afadSYan Zheng int i; 3485c146afadSYan Zheng int ret; 3486c146afadSYan Zheng 3487c146afadSYan Zheng while (1) { 3488c146afadSYan Zheng ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 3489c146afadSYan Zheng (void **)gang, root_objectid, 3490c146afadSYan Zheng ARRAY_SIZE(gang)); 3491c146afadSYan Zheng if (!ret) 3492c146afadSYan Zheng break; 34935d4f98a2SYan Zheng 34945d4f98a2SYan Zheng root_objectid = gang[ret - 1]->root_key.objectid + 1; 3495c146afadSYan Zheng for (i = 0; i < ret; i++) { 349666b4ffd1SJosef Bacik int err; 349766b4ffd1SJosef Bacik 3498c146afadSYan Zheng root_objectid = gang[i]->root_key.objectid; 349966b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(gang[i]); 350066b4ffd1SJosef Bacik if (err) 350166b4ffd1SJosef Bacik return err; 3502c146afadSYan Zheng } 3503c146afadSYan Zheng root_objectid++; 3504c146afadSYan Zheng } 3505c146afadSYan Zheng return 0; 3506c146afadSYan Zheng } 3507c146afadSYan Zheng 3508c146afadSYan Zheng int btrfs_commit_super(struct btrfs_root *root) 3509c146afadSYan Zheng { 3510c146afadSYan Zheng struct btrfs_trans_handle *trans; 3511c146afadSYan Zheng 3512c146afadSYan Zheng mutex_lock(&root->fs_info->cleaner_mutex); 351324bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 3514c146afadSYan Zheng mutex_unlock(&root->fs_info->cleaner_mutex); 35159d1a2a3aSDavid Sterba wake_up_process(root->fs_info->cleaner_kthread); 3516c71bf099SYan, Zheng 3517c71bf099SYan, Zheng /* wait until ongoing cleanup work done */ 3518c71bf099SYan, Zheng down_write(&root->fs_info->cleanup_work_sem); 3519c71bf099SYan, Zheng up_write(&root->fs_info->cleanup_work_sem); 3520c71bf099SYan, Zheng 35217a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 35223612b495STsutomu Itoh if (IS_ERR(trans)) 35233612b495STsutomu Itoh return PTR_ERR(trans); 3524d52c1bccSLiu Bo return btrfs_commit_transaction(trans, root); 3525c146afadSYan Zheng } 3526c146afadSYan Zheng 3527e20d96d6SChris Mason int close_ctree(struct btrfs_root *root) 3528eb60ceacSChris Mason { 35290f7d52f4SChris Mason struct btrfs_fs_info *fs_info = root->fs_info; 3530c146afadSYan Zheng int ret; 3531e089f05cSChris Mason 3532facda1e7SChris Mason fs_info->closing = 1; 3533a2135011SChris Mason smp_mb(); 3534a2135011SChris Mason 3535803b2f54SStefan Behrens /* wait for the uuid_scan task to finish */ 3536803b2f54SStefan Behrens down(&fs_info->uuid_tree_rescan_sem); 3537803b2f54SStefan Behrens /* avoid complains from lockdep et al., set sem back to initial state */ 3538803b2f54SStefan Behrens up(&fs_info->uuid_tree_rescan_sem); 3539803b2f54SStefan Behrens 3540837d5b6eSIlya Dryomov /* pause restriper - we want to resume on mount */ 3541aa1b8cd4SStefan Behrens btrfs_pause_balance(fs_info); 3542837d5b6eSIlya Dryomov 35438dabb742SStefan Behrens btrfs_dev_replace_suspend_for_unmount(fs_info); 35448dabb742SStefan Behrens 3545aa1b8cd4SStefan Behrens btrfs_scrub_cancel(fs_info); 35464cb5300bSChris Mason 35474cb5300bSChris Mason /* wait for any defraggers to finish */ 35484cb5300bSChris Mason wait_event(fs_info->transaction_wait, 35494cb5300bSChris Mason (atomic_read(&fs_info->defrag_running) == 0)); 35504cb5300bSChris Mason 35514cb5300bSChris Mason /* clear out the rbtree of defraggable inodes */ 355226176e7cSMiao Xie btrfs_cleanup_defrag_inodes(fs_info); 35534cb5300bSChris Mason 3554c146afadSYan Zheng if (!(fs_info->sb->s_flags & MS_RDONLY)) { 3555c146afadSYan Zheng ret = btrfs_commit_super(root); 3556d397712bSChris Mason if (ret) 3557d397712bSChris Mason printk(KERN_ERR "btrfs: commit super ret %d\n", ret); 3558c146afadSYan Zheng } 3559ed2ff2cbSChris Mason 356087533c47SMiao Xie if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) 356168ce9682SStefan Behrens btrfs_error_commit_super(root); 3562acce952bSliubo 3563300e4f8aSJosef Bacik btrfs_put_block_group_cache(fs_info); 3564300e4f8aSJosef Bacik 3565e3029d9fSAl Viro kthread_stop(fs_info->transaction_kthread); 3566e3029d9fSAl Viro kthread_stop(fs_info->cleaner_kthread); 35678929ecfaSYan, Zheng 3568f25784b3SYan Zheng fs_info->closing = 2; 3569f25784b3SYan Zheng smp_mb(); 3570f25784b3SYan Zheng 3571bcef60f2SArne Jansen btrfs_free_qgroup_config(root->fs_info); 3572bcef60f2SArne Jansen 3573963d678bSMiao Xie if (percpu_counter_sum(&fs_info->delalloc_bytes)) { 3574963d678bSMiao Xie printk(KERN_INFO "btrfs: at unmount delalloc count %lld\n", 3575963d678bSMiao Xie percpu_counter_sum(&fs_info->delalloc_bytes)); 3576b0c68f8bSChris Mason } 357731153d81SYan Zheng 35785ac1d209SJeff Mahoney btrfs_sysfs_remove_one(fs_info); 35795ac1d209SJeff Mahoney 35800f7d52f4SChris Mason del_fs_roots(fs_info); 3581d10c5f31SChris Mason 35822b1360daSJosef Bacik btrfs_free_block_groups(fs_info); 35832b1360daSJosef Bacik 358496192499SJosef Bacik btrfs_stop_all_workers(fs_info); 358596192499SJosef Bacik 358613e6c37bSJosef Bacik free_root_pointers(fs_info, 1); 35879ad6b7bcSChris Mason 358813e6c37bSJosef Bacik iput(fs_info->btree_inode); 3589d6bfde87SChris Mason 359021adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 359121adbd5cSStefan Behrens if (btrfs_test_opt(root, CHECK_INTEGRITY)) 359221adbd5cSStefan Behrens btrfsic_unmount(root, fs_info->fs_devices); 359321adbd5cSStefan Behrens #endif 359421adbd5cSStefan Behrens 3595dfe25020SChris Mason btrfs_close_devices(fs_info->fs_devices); 35960b86a832SChris Mason btrfs_mapping_tree_free(&fs_info->mapping_tree); 3597b248a415SChris Mason 3598e2d84521SMiao Xie percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 3599963d678bSMiao Xie percpu_counter_destroy(&fs_info->delalloc_bytes); 360004160088SChris Mason bdi_destroy(&fs_info->bdi); 360176dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 36020b86a832SChris Mason 360353b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 360453b381b3SDavid Woodhouse 36051cb048f5SFilipe David Borba Manana btrfs_free_block_rsv(root, root->orphan_block_rsv); 36061cb048f5SFilipe David Borba Manana root->orphan_block_rsv = NULL; 36071cb048f5SFilipe David Borba Manana 3608eb60ceacSChris Mason return 0; 3609eb60ceacSChris Mason } 3610eb60ceacSChris Mason 3611b9fab919SChris Mason int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, 3612b9fab919SChris Mason int atomic) 3613ccd467d6SChris Mason { 36141259ab75SChris Mason int ret; 3615727011e0SChris Mason struct inode *btree_inode = buf->pages[0]->mapping->host; 36161259ab75SChris Mason 36170b32f4bbSJosef Bacik ret = extent_buffer_uptodate(buf); 36181259ab75SChris Mason if (!ret) 36191259ab75SChris Mason return ret; 36201259ab75SChris Mason 36211259ab75SChris Mason ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, 3622b9fab919SChris Mason parent_transid, atomic); 3623b9fab919SChris Mason if (ret == -EAGAIN) 3624b9fab919SChris Mason return ret; 36251259ab75SChris Mason return !ret; 36265f39d397SChris Mason } 36276702ed49SChris Mason 36285f39d397SChris Mason int btrfs_set_buffer_uptodate(struct extent_buffer *buf) 36295f39d397SChris Mason { 36300b32f4bbSJosef Bacik return set_extent_buffer_uptodate(buf); 36315f39d397SChris Mason } 36325f39d397SChris Mason 36335f39d397SChris Mason void btrfs_mark_buffer_dirty(struct extent_buffer *buf) 36345f39d397SChris Mason { 363506ea65a3SJosef Bacik struct btrfs_root *root; 36365f39d397SChris Mason u64 transid = btrfs_header_generation(buf); 3637b9473439SChris Mason int was_dirty; 3638b4ce94deSChris Mason 363906ea65a3SJosef Bacik #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 364006ea65a3SJosef Bacik /* 364106ea65a3SJosef Bacik * This is a fast path so only do this check if we have sanity tests 364206ea65a3SJosef Bacik * enabled. Normal people shouldn't be marking dummy buffers as dirty 364306ea65a3SJosef Bacik * outside of the sanity tests. 364406ea65a3SJosef Bacik */ 364506ea65a3SJosef Bacik if (unlikely(test_bit(EXTENT_BUFFER_DUMMY, &buf->bflags))) 364606ea65a3SJosef Bacik return; 364706ea65a3SJosef Bacik #endif 364806ea65a3SJosef Bacik root = BTRFS_I(buf->pages[0]->mapping->host)->root; 3649b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 365031b1a2bdSJulia Lawall if (transid != root->fs_info->generation) 365131b1a2bdSJulia Lawall WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, " 3652d397712bSChris Mason "found %llu running %llu\n", 3653c1c9ff7cSGeert Uytterhoeven buf->start, transid, root->fs_info->generation); 36540b32f4bbSJosef Bacik was_dirty = set_extent_buffer_dirty(buf); 3655e2d84521SMiao Xie if (!was_dirty) 3656e2d84521SMiao Xie __percpu_counter_add(&root->fs_info->dirty_metadata_bytes, 3657e2d84521SMiao Xie buf->len, 3658e2d84521SMiao Xie root->fs_info->dirty_metadata_batch); 3659eb60ceacSChris Mason } 3660eb60ceacSChris Mason 3661b53d3f5dSLiu Bo static void __btrfs_btree_balance_dirty(struct btrfs_root *root, 3662b53d3f5dSLiu Bo int flush_delayed) 366335b7e476SChris Mason { 3664188de649SChris Mason /* 3665188de649SChris Mason * looks as though older kernels can get into trouble with 3666188de649SChris Mason * this code, they end up stuck in balance_dirty_pages forever 3667188de649SChris Mason */ 3668e2d84521SMiao Xie int ret; 3669d6bfde87SChris Mason 36706933c02eSJens Axboe if (current->flags & PF_MEMALLOC) 3671d6bfde87SChris Mason return; 3672d6bfde87SChris Mason 3673b53d3f5dSLiu Bo if (flush_delayed) 367416cdcec7SMiao Xie btrfs_balance_delayed_items(root); 367516cdcec7SMiao Xie 3676e2d84521SMiao Xie ret = percpu_counter_compare(&root->fs_info->dirty_metadata_bytes, 3677e2d84521SMiao Xie BTRFS_DIRTY_METADATA_THRESH); 3678e2d84521SMiao Xie if (ret > 0) { 3679d0e1d66bSNamjae Jeon balance_dirty_pages_ratelimited( 3680d0e1d66bSNamjae Jeon root->fs_info->btree_inode->i_mapping); 368116cdcec7SMiao Xie } 368216cdcec7SMiao Xie return; 368316cdcec7SMiao Xie } 368416cdcec7SMiao Xie 3685b53d3f5dSLiu Bo void btrfs_btree_balance_dirty(struct btrfs_root *root) 368616cdcec7SMiao Xie { 3687b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 1); 368835b7e476SChris Mason } 3689b53d3f5dSLiu Bo 3690b53d3f5dSLiu Bo void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root) 3691b53d3f5dSLiu Bo { 3692b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 0); 3693d6bfde87SChris Mason } 36946b80053dSChris Mason 3695ca7a79adSChris Mason int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) 36966b80053dSChris Mason { 3697727011e0SChris Mason struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; 36980b32f4bbSJosef Bacik return btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 36996b80053dSChris Mason } 37000da5468fSChris Mason 3701fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 3702acce952bSliubo int read_only) 3703acce952bSliubo { 37041104a885SDavid Sterba /* 37051104a885SDavid Sterba * Placeholder for checks 37061104a885SDavid Sterba */ 3707fcd1f065SDavid Sterba return 0; 3708fcd1f065SDavid Sterba } 3709fcd1f065SDavid Sterba 371048a3b636SEric Sandeen static void btrfs_error_commit_super(struct btrfs_root *root) 3711acce952bSliubo { 3712acce952bSliubo mutex_lock(&root->fs_info->cleaner_mutex); 3713acce952bSliubo btrfs_run_delayed_iputs(root); 3714acce952bSliubo mutex_unlock(&root->fs_info->cleaner_mutex); 3715acce952bSliubo 3716acce952bSliubo down_write(&root->fs_info->cleanup_work_sem); 3717acce952bSliubo up_write(&root->fs_info->cleanup_work_sem); 3718acce952bSliubo 3719acce952bSliubo /* cleanup FS via transaction */ 3720acce952bSliubo btrfs_cleanup_transaction(root); 3721acce952bSliubo } 3722acce952bSliubo 3723569e0f35SJosef Bacik static void btrfs_destroy_ordered_operations(struct btrfs_transaction *t, 3724569e0f35SJosef Bacik struct btrfs_root *root) 3725acce952bSliubo { 3726acce952bSliubo struct btrfs_inode *btrfs_inode; 3727acce952bSliubo struct list_head splice; 3728acce952bSliubo 3729acce952bSliubo INIT_LIST_HEAD(&splice); 3730acce952bSliubo 3731acce952bSliubo mutex_lock(&root->fs_info->ordered_operations_mutex); 3732199c2a9cSMiao Xie spin_lock(&root->fs_info->ordered_root_lock); 3733acce952bSliubo 3734569e0f35SJosef Bacik list_splice_init(&t->ordered_operations, &splice); 3735acce952bSliubo while (!list_empty(&splice)) { 3736acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3737acce952bSliubo ordered_operations); 3738acce952bSliubo 3739acce952bSliubo list_del_init(&btrfs_inode->ordered_operations); 3740199c2a9cSMiao Xie spin_unlock(&root->fs_info->ordered_root_lock); 3741acce952bSliubo 3742acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3743b216cbfbSMiao Xie 3744199c2a9cSMiao Xie spin_lock(&root->fs_info->ordered_root_lock); 3745acce952bSliubo } 3746acce952bSliubo 3747199c2a9cSMiao Xie spin_unlock(&root->fs_info->ordered_root_lock); 3748acce952bSliubo mutex_unlock(&root->fs_info->ordered_operations_mutex); 3749acce952bSliubo } 3750acce952bSliubo 3751143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root) 3752acce952bSliubo { 3753acce952bSliubo struct btrfs_ordered_extent *ordered; 3754acce952bSliubo 3755199c2a9cSMiao Xie spin_lock(&root->ordered_extent_lock); 3756779880efSJosef Bacik /* 3757779880efSJosef Bacik * This will just short circuit the ordered completion stuff which will 3758779880efSJosef Bacik * make sure the ordered extent gets properly cleaned up. 3759779880efSJosef Bacik */ 3760199c2a9cSMiao Xie list_for_each_entry(ordered, &root->ordered_extents, 3761779880efSJosef Bacik root_extent_list) 3762779880efSJosef Bacik set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); 3763199c2a9cSMiao Xie spin_unlock(&root->ordered_extent_lock); 3764199c2a9cSMiao Xie } 3765199c2a9cSMiao Xie 3766199c2a9cSMiao Xie static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info) 3767199c2a9cSMiao Xie { 3768199c2a9cSMiao Xie struct btrfs_root *root; 3769199c2a9cSMiao Xie struct list_head splice; 3770199c2a9cSMiao Xie 3771199c2a9cSMiao Xie INIT_LIST_HEAD(&splice); 3772199c2a9cSMiao Xie 3773199c2a9cSMiao Xie spin_lock(&fs_info->ordered_root_lock); 3774199c2a9cSMiao Xie list_splice_init(&fs_info->ordered_roots, &splice); 3775199c2a9cSMiao Xie while (!list_empty(&splice)) { 3776199c2a9cSMiao Xie root = list_first_entry(&splice, struct btrfs_root, 3777199c2a9cSMiao Xie ordered_root); 37781de2cfdeSJosef Bacik list_move_tail(&root->ordered_root, 37791de2cfdeSJosef Bacik &fs_info->ordered_roots); 3780199c2a9cSMiao Xie 3781199c2a9cSMiao Xie btrfs_destroy_ordered_extents(root); 3782199c2a9cSMiao Xie 3783199c2a9cSMiao Xie cond_resched_lock(&fs_info->ordered_root_lock); 3784199c2a9cSMiao Xie } 3785199c2a9cSMiao Xie spin_unlock(&fs_info->ordered_root_lock); 3786acce952bSliubo } 3787acce952bSliubo 378835a3621bSStefan Behrens static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 3789acce952bSliubo struct btrfs_root *root) 3790acce952bSliubo { 3791acce952bSliubo struct rb_node *node; 3792acce952bSliubo struct btrfs_delayed_ref_root *delayed_refs; 3793acce952bSliubo struct btrfs_delayed_ref_node *ref; 3794acce952bSliubo int ret = 0; 3795acce952bSliubo 3796acce952bSliubo delayed_refs = &trans->delayed_refs; 3797acce952bSliubo 3798acce952bSliubo spin_lock(&delayed_refs->lock); 3799acce952bSliubo if (delayed_refs->num_entries == 0) { 3800cfece4dbSDavid Sterba spin_unlock(&delayed_refs->lock); 3801acce952bSliubo printk(KERN_INFO "delayed_refs has NO entry\n"); 3802acce952bSliubo return ret; 3803acce952bSliubo } 3804acce952bSliubo 3805b939d1abSJosef Bacik while ((node = rb_first(&delayed_refs->root)) != NULL) { 3806eb12db69SJosef Bacik struct btrfs_delayed_ref_head *head = NULL; 3807e78417d1SJosef Bacik bool pin_bytes = false; 3808acce952bSliubo 3809eb12db69SJosef Bacik ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node); 3810acce952bSliubo atomic_set(&ref->refs, 1); 3811acce952bSliubo if (btrfs_delayed_ref_is_head(ref)) { 3812acce952bSliubo 3813acce952bSliubo head = btrfs_delayed_node_to_head(ref); 3814b939d1abSJosef Bacik if (!mutex_trylock(&head->mutex)) { 3815b939d1abSJosef Bacik atomic_inc(&ref->refs); 381679787eaaSJeff Mahoney spin_unlock(&delayed_refs->lock); 3817b939d1abSJosef Bacik 3818b939d1abSJosef Bacik /* Need to wait for the delayed ref to run */ 3819acce952bSliubo mutex_lock(&head->mutex); 3820b939d1abSJosef Bacik mutex_unlock(&head->mutex); 3821b939d1abSJosef Bacik btrfs_put_delayed_ref(ref); 3822b939d1abSJosef Bacik 3823e18fca73SJosef Bacik spin_lock(&delayed_refs->lock); 3824b939d1abSJosef Bacik continue; 3825b939d1abSJosef Bacik } 3826b939d1abSJosef Bacik 382754067ae9SJosef Bacik if (head->must_insert_reserved) 3828e78417d1SJosef Bacik pin_bytes = true; 382978a6184aSMiao Xie btrfs_free_delayed_extent_op(head->extent_op); 3830acce952bSliubo delayed_refs->num_heads--; 3831acce952bSliubo if (list_empty(&head->cluster)) 3832acce952bSliubo delayed_refs->num_heads_ready--; 3833acce952bSliubo list_del_init(&head->cluster); 3834acce952bSliubo } 3835eb12db69SJosef Bacik 3836b939d1abSJosef Bacik ref->in_tree = 0; 3837b939d1abSJosef Bacik rb_erase(&ref->rb_node, &delayed_refs->root); 3838c46effa6SLiu Bo if (head) 3839c46effa6SLiu Bo rb_erase(&head->href_node, &delayed_refs->href_root); 3840c46effa6SLiu Bo 3841b939d1abSJosef Bacik delayed_refs->num_entries--; 3842acce952bSliubo spin_unlock(&delayed_refs->lock); 3843e78417d1SJosef Bacik if (head) { 3844e78417d1SJosef Bacik if (pin_bytes) 3845e78417d1SJosef Bacik btrfs_pin_extent(root, ref->bytenr, 3846e78417d1SJosef Bacik ref->num_bytes, 1); 3847e78417d1SJosef Bacik mutex_unlock(&head->mutex); 3848e78417d1SJosef Bacik } 3849acce952bSliubo btrfs_put_delayed_ref(ref); 3850acce952bSliubo 3851acce952bSliubo cond_resched(); 3852acce952bSliubo spin_lock(&delayed_refs->lock); 3853acce952bSliubo } 3854acce952bSliubo 3855acce952bSliubo spin_unlock(&delayed_refs->lock); 3856acce952bSliubo 3857acce952bSliubo return ret; 3858acce952bSliubo } 3859acce952bSliubo 3860143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) 3861acce952bSliubo { 3862acce952bSliubo struct btrfs_inode *btrfs_inode; 3863acce952bSliubo struct list_head splice; 3864acce952bSliubo 3865acce952bSliubo INIT_LIST_HEAD(&splice); 3866acce952bSliubo 3867eb73c1b7SMiao Xie spin_lock(&root->delalloc_lock); 3868eb73c1b7SMiao Xie list_splice_init(&root->delalloc_inodes, &splice); 3869acce952bSliubo 3870acce952bSliubo while (!list_empty(&splice)) { 3871eb73c1b7SMiao Xie btrfs_inode = list_first_entry(&splice, struct btrfs_inode, 3872acce952bSliubo delalloc_inodes); 3873acce952bSliubo 3874acce952bSliubo list_del_init(&btrfs_inode->delalloc_inodes); 3875df0af1a5SMiao Xie clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, 3876df0af1a5SMiao Xie &btrfs_inode->runtime_flags); 3877eb73c1b7SMiao Xie spin_unlock(&root->delalloc_lock); 3878acce952bSliubo 3879acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3880b216cbfbSMiao Xie 3881eb73c1b7SMiao Xie spin_lock(&root->delalloc_lock); 3882acce952bSliubo } 3883acce952bSliubo 3884eb73c1b7SMiao Xie spin_unlock(&root->delalloc_lock); 3885eb73c1b7SMiao Xie } 3886eb73c1b7SMiao Xie 3887eb73c1b7SMiao Xie static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info) 3888eb73c1b7SMiao Xie { 3889eb73c1b7SMiao Xie struct btrfs_root *root; 3890eb73c1b7SMiao Xie struct list_head splice; 3891eb73c1b7SMiao Xie 3892eb73c1b7SMiao Xie INIT_LIST_HEAD(&splice); 3893eb73c1b7SMiao Xie 3894eb73c1b7SMiao Xie spin_lock(&fs_info->delalloc_root_lock); 3895eb73c1b7SMiao Xie list_splice_init(&fs_info->delalloc_roots, &splice); 3896eb73c1b7SMiao Xie while (!list_empty(&splice)) { 3897eb73c1b7SMiao Xie root = list_first_entry(&splice, struct btrfs_root, 3898eb73c1b7SMiao Xie delalloc_root); 3899eb73c1b7SMiao Xie list_del_init(&root->delalloc_root); 3900eb73c1b7SMiao Xie root = btrfs_grab_fs_root(root); 3901eb73c1b7SMiao Xie BUG_ON(!root); 3902eb73c1b7SMiao Xie spin_unlock(&fs_info->delalloc_root_lock); 3903eb73c1b7SMiao Xie 3904eb73c1b7SMiao Xie btrfs_destroy_delalloc_inodes(root); 3905eb73c1b7SMiao Xie btrfs_put_fs_root(root); 3906eb73c1b7SMiao Xie 3907eb73c1b7SMiao Xie spin_lock(&fs_info->delalloc_root_lock); 3908eb73c1b7SMiao Xie } 3909eb73c1b7SMiao Xie spin_unlock(&fs_info->delalloc_root_lock); 3910acce952bSliubo } 3911acce952bSliubo 3912acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 3913acce952bSliubo struct extent_io_tree *dirty_pages, 3914acce952bSliubo int mark) 3915acce952bSliubo { 3916acce952bSliubo int ret; 3917acce952bSliubo struct extent_buffer *eb; 3918acce952bSliubo u64 start = 0; 3919acce952bSliubo u64 end; 3920acce952bSliubo 3921acce952bSliubo while (1) { 3922acce952bSliubo ret = find_first_extent_bit(dirty_pages, start, &start, &end, 3923e6138876SJosef Bacik mark, NULL); 3924acce952bSliubo if (ret) 3925acce952bSliubo break; 3926acce952bSliubo 3927acce952bSliubo clear_extent_bits(dirty_pages, start, end, mark, GFP_NOFS); 3928acce952bSliubo while (start <= end) { 3929fd8b2b61SJosef Bacik eb = btrfs_find_tree_block(root, start, 3930fd8b2b61SJosef Bacik root->leafsize); 393169a85bd8SJosef Bacik start += root->leafsize; 3932fd8b2b61SJosef Bacik if (!eb) 3933acce952bSliubo continue; 3934fd8b2b61SJosef Bacik wait_on_extent_buffer_writeback(eb); 3935acce952bSliubo 3936fd8b2b61SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, 3937fd8b2b61SJosef Bacik &eb->bflags)) 3938fd8b2b61SJosef Bacik clear_extent_buffer_dirty(eb); 3939fd8b2b61SJosef Bacik free_extent_buffer_stale(eb); 3940acce952bSliubo } 3941acce952bSliubo } 3942acce952bSliubo 3943acce952bSliubo return ret; 3944acce952bSliubo } 3945acce952bSliubo 3946acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 3947acce952bSliubo struct extent_io_tree *pinned_extents) 3948acce952bSliubo { 3949acce952bSliubo struct extent_io_tree *unpin; 3950acce952bSliubo u64 start; 3951acce952bSliubo u64 end; 3952acce952bSliubo int ret; 3953ed0eaa14SLiu Bo bool loop = true; 3954acce952bSliubo 3955acce952bSliubo unpin = pinned_extents; 3956ed0eaa14SLiu Bo again: 3957acce952bSliubo while (1) { 3958acce952bSliubo ret = find_first_extent_bit(unpin, 0, &start, &end, 3959e6138876SJosef Bacik EXTENT_DIRTY, NULL); 3960acce952bSliubo if (ret) 3961acce952bSliubo break; 3962acce952bSliubo 3963acce952bSliubo /* opt_discard */ 39645378e607SLi Dongyang if (btrfs_test_opt(root, DISCARD)) 39655378e607SLi Dongyang ret = btrfs_error_discard_extent(root, start, 39665378e607SLi Dongyang end + 1 - start, 39675378e607SLi Dongyang NULL); 3968acce952bSliubo 3969acce952bSliubo clear_extent_dirty(unpin, start, end, GFP_NOFS); 3970acce952bSliubo btrfs_error_unpin_extent_range(root, start, end); 3971acce952bSliubo cond_resched(); 3972acce952bSliubo } 3973acce952bSliubo 3974ed0eaa14SLiu Bo if (loop) { 3975ed0eaa14SLiu Bo if (unpin == &root->fs_info->freed_extents[0]) 3976ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[1]; 3977ed0eaa14SLiu Bo else 3978ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[0]; 3979ed0eaa14SLiu Bo loop = false; 3980ed0eaa14SLiu Bo goto again; 3981ed0eaa14SLiu Bo } 3982ed0eaa14SLiu Bo 3983acce952bSliubo return 0; 3984acce952bSliubo } 3985acce952bSliubo 398649b25e05SJeff Mahoney void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, 398749b25e05SJeff Mahoney struct btrfs_root *root) 398849b25e05SJeff Mahoney { 3989724e2315SJosef Bacik btrfs_destroy_ordered_operations(cur_trans, root); 3990724e2315SJosef Bacik 399149b25e05SJeff Mahoney btrfs_destroy_delayed_refs(cur_trans, root); 399249b25e05SJeff Mahoney 39934a9d8bdeSMiao Xie cur_trans->state = TRANS_STATE_COMMIT_START; 399449b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_blocked_wait); 399549b25e05SJeff Mahoney 39964a9d8bdeSMiao Xie cur_trans->state = TRANS_STATE_UNBLOCKED; 399749b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_wait); 399849b25e05SJeff Mahoney 399967cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 400067cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 400167cde344SMiao Xie 400249b25e05SJeff Mahoney btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, 400349b25e05SJeff Mahoney EXTENT_DIRTY); 40046e841e32SLiu Bo btrfs_destroy_pinned_extent(root, 40056e841e32SLiu Bo root->fs_info->pinned_extents); 400649b25e05SJeff Mahoney 40074a9d8bdeSMiao Xie cur_trans->state =TRANS_STATE_COMPLETED; 40084a9d8bdeSMiao Xie wake_up(&cur_trans->commit_wait); 40094a9d8bdeSMiao Xie 401049b25e05SJeff Mahoney /* 401149b25e05SJeff Mahoney memset(cur_trans, 0, sizeof(*cur_trans)); 401249b25e05SJeff Mahoney kmem_cache_free(btrfs_transaction_cachep, cur_trans); 401349b25e05SJeff Mahoney */ 401449b25e05SJeff Mahoney } 401549b25e05SJeff Mahoney 401648a3b636SEric Sandeen static int btrfs_cleanup_transaction(struct btrfs_root *root) 4017acce952bSliubo { 4018acce952bSliubo struct btrfs_transaction *t; 4019acce952bSliubo 4020acce952bSliubo mutex_lock(&root->fs_info->transaction_kthread_mutex); 4021acce952bSliubo 4022a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 4023724e2315SJosef Bacik while (!list_empty(&root->fs_info->trans_list)) { 4024724e2315SJosef Bacik t = list_first_entry(&root->fs_info->trans_list, 4025724e2315SJosef Bacik struct btrfs_transaction, list); 4026724e2315SJosef Bacik if (t->state >= TRANS_STATE_COMMIT_START) { 4027724e2315SJosef Bacik atomic_inc(&t->use_count); 4028724e2315SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4029724e2315SJosef Bacik btrfs_wait_for_commit(root, t->transid); 4030724e2315SJosef Bacik btrfs_put_transaction(t); 4031724e2315SJosef Bacik spin_lock(&root->fs_info->trans_lock); 4032724e2315SJosef Bacik continue; 4033724e2315SJosef Bacik } 4034724e2315SJosef Bacik if (t == root->fs_info->running_transaction) { 4035724e2315SJosef Bacik t->state = TRANS_STATE_COMMIT_DOING; 4036724e2315SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4037724e2315SJosef Bacik /* 4038724e2315SJosef Bacik * We wait for 0 num_writers since we don't hold a trans 4039724e2315SJosef Bacik * handle open currently for this transaction. 4040724e2315SJosef Bacik */ 4041724e2315SJosef Bacik wait_event(t->writer_wait, 4042724e2315SJosef Bacik atomic_read(&t->num_writers) == 0); 4043724e2315SJosef Bacik } else { 4044724e2315SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4045724e2315SJosef Bacik } 4046724e2315SJosef Bacik btrfs_cleanup_one_transaction(t, root); 4047724e2315SJosef Bacik 4048724e2315SJosef Bacik spin_lock(&root->fs_info->trans_lock); 4049724e2315SJosef Bacik if (t == root->fs_info->running_transaction) 4050ac673879SMiao Xie root->fs_info->running_transaction = NULL; 4051724e2315SJosef Bacik list_del_init(&t->list); 4052a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4053a4abeea4SJosef Bacik 4054724e2315SJosef Bacik btrfs_put_transaction(t); 4055724e2315SJosef Bacik trace_btrfs_transaction_commit(root); 4056724e2315SJosef Bacik spin_lock(&root->fs_info->trans_lock); 4057724e2315SJosef Bacik } 4058724e2315SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4059199c2a9cSMiao Xie btrfs_destroy_all_ordered_extents(root->fs_info); 406067cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 406167cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 4062724e2315SJosef Bacik btrfs_destroy_pinned_extent(root, root->fs_info->pinned_extents); 4063eb73c1b7SMiao Xie btrfs_destroy_all_delalloc_inodes(root->fs_info); 4064acce952bSliubo mutex_unlock(&root->fs_info->transaction_kthread_mutex); 4065acce952bSliubo 4066acce952bSliubo return 0; 4067acce952bSliubo } 4068acce952bSliubo 4069d1310b2eSChris Mason static struct extent_io_ops btree_extent_io_ops = { 4070ce9adaa5SChris Mason .readpage_end_io_hook = btree_readpage_end_io_hook, 40714bb31e92SArne Jansen .readpage_io_failed_hook = btree_io_failed_hook, 40720b86a832SChris Mason .submit_bio_hook = btree_submit_bio_hook, 4073239b14b3SChris Mason /* note we're sharing with inode.c for the merge bio hook */ 4074239b14b3SChris Mason .merge_bio_hook = btrfs_merge_bio_hook, 40750da5468fSChris Mason }; 4076