Chris Mason | 6cbd557 | 2007-06-12 09:07:21 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 Oracle. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public |
| 6 | * License v2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public |
| 14 | * License along with this program; if not, write to the |
| 15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 16 | * Boston, MA 021110-1307, USA. |
| 17 | */ |
| 18 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 19 | #include <linux/fs.h> |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 20 | #include <linux/blkdev.h> |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 21 | #include <linux/scatterlist.h> |
Chris Mason | 22b0ebd | 2007-03-30 08:47:31 -0400 | [diff] [blame] | 22 | #include <linux/swap.h> |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 23 | #include <linux/radix-tree.h> |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 24 | #include <linux/writeback.h> |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 25 | #include <linux/buffer_head.h> |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 26 | #include <linux/workqueue.h> |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 27 | #include <linux/kthread.h> |
Chris Mason | 4b4e25f | 2008-11-20 10:22:27 -0500 | [diff] [blame] | 28 | #include <linux/freezer.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 29 | #include <linux/slab.h> |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 30 | #include <linux/migrate.h> |
David Sterba | 7a36dde | 2011-05-06 15:33:15 +0200 | [diff] [blame] | 31 | #include <linux/ratelimit.h> |
Stefan Behrens | 6463fe5 | 2013-04-19 15:08:05 +0000 | [diff] [blame] | 32 | #include <linux/uuid.h> |
Stefan Behrens | 803b2f5 | 2013-08-15 17:11:21 +0200 | [diff] [blame] | 33 | #include <linux/semaphore.h> |
David Sterba | 7e75bf3 | 2011-03-18 22:56:43 +0000 | [diff] [blame] | 34 | #include <asm/unaligned.h> |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 35 | #include "ctree.h" |
| 36 | #include "disk-io.h" |
Filipe David Borba Manana | 0b947af | 2014-01-29 21:06:04 +0000 | [diff] [blame] | 37 | #include "hash.h" |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 38 | #include "transaction.h" |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 39 | #include "btrfs_inode.h" |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 40 | #include "volumes.h" |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 41 | #include "print-tree.h" |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 42 | #include "locking.h" |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 43 | #include "tree-log.h" |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 44 | #include "free-space-cache.h" |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 45 | #include "inode-map.h" |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 46 | #include "check-integrity.h" |
Josef Bacik | 606686e | 2012-06-04 14:03:51 -0400 | [diff] [blame] | 47 | #include "rcu-string.h" |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 48 | #include "dev-replace.h" |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 49 | #include "raid56.h" |
Jeff Mahoney | 5ac1d20 | 2013-11-01 13:06:58 -0400 | [diff] [blame] | 50 | #include "sysfs.h" |
Josef Bacik | fcebe45 | 2014-05-13 17:30:47 -0700 | [diff] [blame] | 51 | #include "qgroup.h" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 52 | |
Josef Bacik | de0022b | 2012-09-25 14:25:58 -0400 | [diff] [blame] | 53 | #ifdef CONFIG_X86 |
| 54 | #include <asm/cpufeature.h> |
| 55 | #endif |
| 56 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 57 | static struct extent_io_ops btree_extent_io_ops; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 58 | static void end_workqueue_fn(struct btrfs_work *work); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 59 | static void free_fs_root(struct btrfs_root *root); |
David Sterba | fcd1f065 | 2012-03-06 00:06:18 +0100 | [diff] [blame] | 60 | static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 61 | int read_only); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 62 | static void btrfs_destroy_ordered_extents(struct btrfs_root *root); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 63 | static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
| 64 | struct btrfs_root *root); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 65 | static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 66 | static int btrfs_destroy_marked_extents(struct btrfs_root *root, |
| 67 | struct extent_io_tree *dirty_pages, |
| 68 | int mark); |
| 69 | static int btrfs_destroy_pinned_extent(struct btrfs_root *root, |
| 70 | struct extent_io_tree *pinned_extents); |
Eric Sandeen | 48a3b63 | 2013-04-25 20:41:01 +0000 | [diff] [blame] | 71 | static int btrfs_cleanup_transaction(struct btrfs_root *root); |
| 72 | static void btrfs_error_commit_super(struct btrfs_root *root); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 73 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 74 | /* |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 75 | * btrfs_end_io_wq structs are used to do processing in task context when an IO |
| 76 | * is complete. This is used during reads to verify checksums, and it is used |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 77 | * by writes to insert metadata for new file extents after IO is complete. |
| 78 | */ |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 79 | struct btrfs_end_io_wq { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 80 | struct bio *bio; |
| 81 | bio_end_io_t *end_io; |
| 82 | void *private; |
| 83 | struct btrfs_fs_info *info; |
| 84 | int error; |
David Sterba | bfebd8b | 2014-07-30 00:25:45 +0200 | [diff] [blame] | 85 | enum btrfs_wq_endio_type metadata; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 86 | struct list_head list; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 87 | struct btrfs_work work; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 88 | }; |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 89 | |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 90 | static struct kmem_cache *btrfs_end_io_wq_cache; |
| 91 | |
| 92 | int __init btrfs_end_io_wq_init(void) |
| 93 | { |
| 94 | btrfs_end_io_wq_cache = kmem_cache_create("btrfs_end_io_wq", |
| 95 | sizeof(struct btrfs_end_io_wq), |
| 96 | 0, |
| 97 | SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, |
| 98 | NULL); |
| 99 | if (!btrfs_end_io_wq_cache) |
| 100 | return -ENOMEM; |
| 101 | return 0; |
| 102 | } |
| 103 | |
| 104 | void btrfs_end_io_wq_exit(void) |
| 105 | { |
| 106 | if (btrfs_end_io_wq_cache) |
| 107 | kmem_cache_destroy(btrfs_end_io_wq_cache); |
| 108 | } |
| 109 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 110 | /* |
| 111 | * async submit bios are used to offload expensive checksumming |
| 112 | * onto the worker threads. They checksum file and metadata bios |
| 113 | * just before they are sent down the IO stack. |
| 114 | */ |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 115 | struct async_submit_bio { |
| 116 | struct inode *inode; |
| 117 | struct bio *bio; |
| 118 | struct list_head list; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 119 | extent_submit_bio_hook_t *submit_bio_start; |
| 120 | extent_submit_bio_hook_t *submit_bio_done; |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 121 | int rw; |
| 122 | int mirror_num; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 123 | unsigned long bio_flags; |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 124 | /* |
| 125 | * bio_offset is optional, can be used if the pages in the bio |
| 126 | * can't tell us where in the file the bio should go |
| 127 | */ |
| 128 | u64 bio_offset; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 129 | struct btrfs_work work; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 130 | int error; |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 131 | }; |
| 132 | |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 133 | /* |
| 134 | * Lockdep class keys for extent_buffer->lock's in this root. For a given |
| 135 | * eb, the lockdep key is determined by the btrfs_root it belongs to and |
| 136 | * the level the eb occupies in the tree. |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 137 | * |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 138 | * Different roots are used for different purposes and may nest inside each |
| 139 | * other and they require separate keysets. As lockdep keys should be |
| 140 | * static, assign keysets according to the purpose of the root as indicated |
| 141 | * by btrfs_root->objectid. This ensures that all special purpose roots |
| 142 | * have separate keysets. |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 143 | * |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 144 | * Lock-nesting across peer nodes is always done with the immediate parent |
| 145 | * node locked thus preventing deadlock. As lockdep doesn't know this, use |
| 146 | * subclass to avoid triggering lockdep warning in such cases. |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 147 | * |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 148 | * The key is set by the readpage_end_io_hook after the buffer has passed |
| 149 | * csum validation but before the pages are unlocked. It is also set by |
| 150 | * btrfs_init_new_buffer on freshly allocated blocks. |
| 151 | * |
| 152 | * We also add a check to make sure the highest level of the tree is the |
| 153 | * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code |
| 154 | * needs update as well. |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 155 | */ |
| 156 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 157 | # if BTRFS_MAX_LEVEL != 8 |
| 158 | # error |
| 159 | # endif |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 160 | |
| 161 | static struct btrfs_lockdep_keyset { |
| 162 | u64 id; /* root objectid */ |
| 163 | const char *name_stem; /* lock name stem */ |
| 164 | char names[BTRFS_MAX_LEVEL + 1][20]; |
| 165 | struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; |
| 166 | } btrfs_lockdep_keysets[] = { |
| 167 | { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, |
| 168 | { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, |
| 169 | { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, |
| 170 | { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, |
| 171 | { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, |
| 172 | { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, |
David Sterba | 60b6297 | 2013-04-30 17:29:29 +0000 | [diff] [blame] | 173 | { .id = BTRFS_QUOTA_TREE_OBJECTID, .name_stem = "quota" }, |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 174 | { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, |
| 175 | { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, |
| 176 | { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, |
David Sterba | 13fd8da | 2013-09-03 18:28:57 +0200 | [diff] [blame] | 177 | { .id = BTRFS_UUID_TREE_OBJECTID, .name_stem = "uuid" }, |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 178 | { .id = 0, .name_stem = "tree" }, |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 179 | }; |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 180 | |
| 181 | void __init btrfs_init_lockdep(void) |
| 182 | { |
| 183 | int i, j; |
| 184 | |
| 185 | /* initialize lockdep class names */ |
| 186 | for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { |
| 187 | struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; |
| 188 | |
| 189 | for (j = 0; j < ARRAY_SIZE(ks->names); j++) |
| 190 | snprintf(ks->names[j], sizeof(ks->names[j]), |
| 191 | "btrfs-%s-%02d", ks->name_stem, j); |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, |
| 196 | int level) |
| 197 | { |
| 198 | struct btrfs_lockdep_keyset *ks; |
| 199 | |
| 200 | BUG_ON(level >= ARRAY_SIZE(ks->keys)); |
| 201 | |
| 202 | /* find the matching keyset, id 0 is the default entry */ |
| 203 | for (ks = btrfs_lockdep_keysets; ks->id; ks++) |
| 204 | if (ks->id == objectid) |
| 205 | break; |
| 206 | |
| 207 | lockdep_set_class_and_name(&eb->lock, |
| 208 | &ks->keys[level], ks->names[level]); |
| 209 | } |
| 210 | |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 211 | #endif |
| 212 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 213 | /* |
| 214 | * extents on the btree inode are pretty simple, there's one extent |
| 215 | * that covers the entire device |
| 216 | */ |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 217 | static struct extent_map *btree_get_extent(struct inode *inode, |
David Sterba | 306e16c | 2011-04-19 14:29:38 +0200 | [diff] [blame] | 218 | struct page *page, size_t pg_offset, u64 start, u64 len, |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 219 | int create) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 220 | { |
| 221 | struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; |
| 222 | struct extent_map *em; |
| 223 | int ret; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 224 | |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 225 | read_lock(&em_tree->lock); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 226 | em = lookup_extent_mapping(em_tree, start, len); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 227 | if (em) { |
| 228 | em->bdev = |
| 229 | BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 230 | read_unlock(&em_tree->lock); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 231 | goto out; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 232 | } |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 233 | read_unlock(&em_tree->lock); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 234 | |
David Sterba | 172ddd6 | 2011-04-21 00:48:27 +0200 | [diff] [blame] | 235 | em = alloc_extent_map(); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 236 | if (!em) { |
| 237 | em = ERR_PTR(-ENOMEM); |
| 238 | goto out; |
| 239 | } |
| 240 | em->start = 0; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 241 | em->len = (u64)-1; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 242 | em->block_len = (u64)-1; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 243 | em->block_start = 0; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 244 | em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 245 | |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 246 | write_lock(&em_tree->lock); |
Josef Bacik | 09a2a8f9 | 2013-04-05 16:51:15 -0400 | [diff] [blame] | 247 | ret = add_extent_mapping(em_tree, em, 0); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 248 | if (ret == -EEXIST) { |
| 249 | free_extent_map(em); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 250 | em = lookup_extent_mapping(em_tree, start, len); |
Tsutomu Itoh | b4f359a | 2012-09-13 03:32:54 -0600 | [diff] [blame] | 251 | if (!em) |
Tsutomu Itoh | 0433f20 | 2012-09-13 03:32:32 -0600 | [diff] [blame] | 252 | em = ERR_PTR(-EIO); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 253 | } else if (ret) { |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 254 | free_extent_map(em); |
Tsutomu Itoh | 0433f20 | 2012-09-13 03:32:32 -0600 | [diff] [blame] | 255 | em = ERR_PTR(ret); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 256 | } |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 257 | write_unlock(&em_tree->lock); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 258 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 259 | out: |
| 260 | return em; |
| 261 | } |
| 262 | |
Liu Bo | b049668 | 2013-03-14 14:57:45 +0000 | [diff] [blame] | 263 | u32 btrfs_csum_data(char *data, u32 seed, size_t len) |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 264 | { |
Filipe David Borba Manana | 0b947af | 2014-01-29 21:06:04 +0000 | [diff] [blame] | 265 | return btrfs_crc32c(seed, data, len); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 266 | } |
| 267 | |
| 268 | void btrfs_csum_final(u32 crc, char *result) |
| 269 | { |
David Sterba | 7e75bf3 | 2011-03-18 22:56:43 +0000 | [diff] [blame] | 270 | put_unaligned_le32(~crc, result); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 271 | } |
| 272 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 273 | /* |
| 274 | * compute the csum for a btree block, and either verify it or write it |
| 275 | * into the csum field of the block. |
| 276 | */ |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 277 | static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, |
| 278 | int verify) |
| 279 | { |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 280 | u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy); |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 281 | char *result = NULL; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 282 | unsigned long len; |
| 283 | unsigned long cur_len; |
| 284 | unsigned long offset = BTRFS_CSUM_SIZE; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 285 | char *kaddr; |
| 286 | unsigned long map_start; |
| 287 | unsigned long map_len; |
| 288 | int err; |
| 289 | u32 crc = ~(u32)0; |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 290 | unsigned long inline_result; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 291 | |
| 292 | len = buf->len - offset; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 293 | while (len > 0) { |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 294 | err = map_private_extent_buffer(buf, offset, 32, |
Chris Mason | a659171 | 2011-07-19 12:04:14 -0400 | [diff] [blame] | 295 | &kaddr, &map_start, &map_len); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 296 | if (err) |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 297 | return 1; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 298 | cur_len = min(len, map_len - (offset - map_start)); |
Liu Bo | b049668 | 2013-03-14 14:57:45 +0000 | [diff] [blame] | 299 | crc = btrfs_csum_data(kaddr + offset - map_start, |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 300 | crc, cur_len); |
| 301 | len -= cur_len; |
| 302 | offset += cur_len; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 303 | } |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 304 | if (csum_size > sizeof(inline_result)) { |
| 305 | result = kzalloc(csum_size * sizeof(char), GFP_NOFS); |
| 306 | if (!result) |
| 307 | return 1; |
| 308 | } else { |
| 309 | result = (char *)&inline_result; |
| 310 | } |
| 311 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 312 | btrfs_csum_final(crc, result); |
| 313 | |
| 314 | if (verify) { |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 315 | if (memcmp_extent_buffer(buf, result, 0, csum_size)) { |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 316 | u32 val; |
| 317 | u32 found = 0; |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 318 | memcpy(&found, result, csum_size); |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 319 | |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 320 | read_extent_buffer(buf, &val, 0, csum_size); |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 321 | printk_ratelimited(KERN_INFO |
| 322 | "BTRFS: %s checksum verify failed on %llu wanted %X found %X " |
| 323 | "level %d\n", |
| 324 | root->fs_info->sb->s_id, buf->start, |
| 325 | val, found, btrfs_header_level(buf)); |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 326 | if (result != (char *)&inline_result) |
| 327 | kfree(result); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 328 | return 1; |
| 329 | } |
| 330 | } else { |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 331 | write_extent_buffer(buf, result, 0, csum_size); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 332 | } |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 333 | if (result != (char *)&inline_result) |
| 334 | kfree(result); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 335 | return 0; |
| 336 | } |
| 337 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 338 | /* |
| 339 | * we can't consider a given block up to date unless the transid of the |
| 340 | * block matches the transid in the parent node's pointer. This is how we |
| 341 | * detect blocks that either didn't get written at all or got written |
| 342 | * in the wrong place. |
| 343 | */ |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 344 | static int verify_parent_transid(struct extent_io_tree *io_tree, |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 345 | struct extent_buffer *eb, u64 parent_transid, |
| 346 | int atomic) |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 347 | { |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 348 | struct extent_state *cached_state = NULL; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 349 | int ret; |
David Sterba | 2755a0d | 2014-07-31 00:43:18 +0200 | [diff] [blame] | 350 | bool need_lock = (current->journal_info == BTRFS_SEND_TRANS_STUB); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 351 | |
| 352 | if (!parent_transid || btrfs_header_generation(eb) == parent_transid) |
| 353 | return 0; |
| 354 | |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 355 | if (atomic) |
| 356 | return -EAGAIN; |
| 357 | |
Josef Bacik | a26e8c9 | 2014-03-28 17:07:27 -0400 | [diff] [blame] | 358 | if (need_lock) { |
| 359 | btrfs_tree_read_lock(eb); |
| 360 | btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK); |
| 361 | } |
| 362 | |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 363 | lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, |
Jeff Mahoney | d008237 | 2012-03-01 14:57:19 +0100 | [diff] [blame] | 364 | 0, &cached_state); |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 365 | if (extent_buffer_uptodate(eb) && |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 366 | btrfs_header_generation(eb) == parent_transid) { |
| 367 | ret = 0; |
| 368 | goto out; |
| 369 | } |
Wang Shilong | 29549ae | 2014-07-04 17:59:06 +0800 | [diff] [blame] | 370 | printk_ratelimited(KERN_INFO "BTRFS (device %s): parent transid verify failed on %llu wanted %llu found %llu\n", |
| 371 | eb->fs_info->sb->s_id, eb->start, |
| 372 | parent_transid, btrfs_header_generation(eb)); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 373 | ret = 1; |
Josef Bacik | a26e8c9 | 2014-03-28 17:07:27 -0400 | [diff] [blame] | 374 | |
| 375 | /* |
| 376 | * Things reading via commit roots that don't have normal protection, |
| 377 | * like send, can have a really old block in cache that may point at a |
| 378 | * block that has been free'd and re-allocated. So don't clear uptodate |
| 379 | * if we find an eb that is under IO (dirty/writeback) because we could |
| 380 | * end up reading in the stale data and then writing it back out and |
| 381 | * making everybody very sad. |
| 382 | */ |
| 383 | if (!extent_buffer_under_io(eb)) |
| 384 | clear_extent_buffer_uptodate(eb); |
Chris Mason | 33958dc | 2008-07-30 10:29:12 -0400 | [diff] [blame] | 385 | out: |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 386 | unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, |
| 387 | &cached_state, GFP_NOFS); |
Josef Bacik | 472b909 | 2014-06-25 13:45:41 -0700 | [diff] [blame] | 388 | if (need_lock) |
| 389 | btrfs_tree_read_unlock_blocking(eb); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 390 | return ret; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 391 | } |
| 392 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 393 | /* |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 394 | * Return 0 if the superblock checksum type matches the checksum value of that |
| 395 | * algorithm. Pass the raw disk superblock data. |
| 396 | */ |
| 397 | static int btrfs_check_super_csum(char *raw_disk_sb) |
| 398 | { |
| 399 | struct btrfs_super_block *disk_sb = |
| 400 | (struct btrfs_super_block *)raw_disk_sb; |
| 401 | u16 csum_type = btrfs_super_csum_type(disk_sb); |
| 402 | int ret = 0; |
| 403 | |
| 404 | if (csum_type == BTRFS_CSUM_TYPE_CRC32) { |
| 405 | u32 crc = ~(u32)0; |
| 406 | const int csum_size = sizeof(crc); |
| 407 | char result[csum_size]; |
| 408 | |
| 409 | /* |
| 410 | * The super_block structure does not span the whole |
| 411 | * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space |
| 412 | * is filled with zeros and is included in the checkum. |
| 413 | */ |
| 414 | crc = btrfs_csum_data(raw_disk_sb + BTRFS_CSUM_SIZE, |
| 415 | crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); |
| 416 | btrfs_csum_final(crc, result); |
| 417 | |
| 418 | if (memcmp(raw_disk_sb, result, csum_size)) |
| 419 | ret = 1; |
Chris Mason | 667e7d9 | 2013-05-07 11:00:13 -0400 | [diff] [blame] | 420 | |
| 421 | if (ret && btrfs_super_generation(disk_sb) < 10) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 422 | printk(KERN_WARNING |
| 423 | "BTRFS: super block crcs don't match, older mkfs detected\n"); |
Chris Mason | 667e7d9 | 2013-05-07 11:00:13 -0400 | [diff] [blame] | 424 | ret = 0; |
| 425 | } |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 426 | } |
| 427 | |
| 428 | if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 429 | printk(KERN_ERR "BTRFS: unsupported checksum algorithm %u\n", |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 430 | csum_type); |
| 431 | ret = 1; |
| 432 | } |
| 433 | |
| 434 | return ret; |
| 435 | } |
| 436 | |
| 437 | /* |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 438 | * helper to read a given tree block, doing retries as required when |
| 439 | * the checksums don't match and we have alternate mirrors to try. |
| 440 | */ |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 441 | static int btree_read_extent_buffer_pages(struct btrfs_root *root, |
| 442 | struct extent_buffer *eb, |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 443 | u64 start, u64 parent_transid) |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 444 | { |
| 445 | struct extent_io_tree *io_tree; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 446 | int failed = 0; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 447 | int ret; |
| 448 | int num_copies = 0; |
| 449 | int mirror_num = 0; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 450 | int failed_mirror = 0; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 451 | |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 452 | clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 453 | io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; |
| 454 | while (1) { |
Arne Jansen | bb82ab8 | 2011-06-10 14:06:53 +0200 | [diff] [blame] | 455 | ret = read_extent_buffer_pages(io_tree, eb, start, |
| 456 | WAIT_COMPLETE, |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 457 | btree_get_extent, mirror_num); |
Stefan Behrens | 256dd1b | 2012-08-10 08:58:21 -0600 | [diff] [blame] | 458 | if (!ret) { |
| 459 | if (!verify_parent_transid(io_tree, eb, |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 460 | parent_transid, 0)) |
Stefan Behrens | 256dd1b | 2012-08-10 08:58:21 -0600 | [diff] [blame] | 461 | break; |
| 462 | else |
| 463 | ret = -EIO; |
| 464 | } |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 465 | |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 466 | /* |
| 467 | * This buffer's crc is fine, but its contents are corrupted, so |
| 468 | * there is no reason to read the other copies, they won't be |
| 469 | * any less wrong. |
| 470 | */ |
| 471 | if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 472 | break; |
| 473 | |
Stefan Behrens | 5d96405 | 2012-11-05 14:59:07 +0100 | [diff] [blame] | 474 | num_copies = btrfs_num_copies(root->fs_info, |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 475 | eb->start, eb->len); |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 476 | if (num_copies == 1) |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 477 | break; |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 478 | |
Josef Bacik | 5cf1ab5 | 2012-04-16 09:42:26 -0400 | [diff] [blame] | 479 | if (!failed_mirror) { |
| 480 | failed = 1; |
| 481 | failed_mirror = eb->read_mirror; |
| 482 | } |
| 483 | |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 484 | mirror_num++; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 485 | if (mirror_num == failed_mirror) |
| 486 | mirror_num++; |
| 487 | |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 488 | if (mirror_num > num_copies) |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 489 | break; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 490 | } |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 491 | |
Stefan Behrens | c090158 | 2012-07-10 07:30:17 -0600 | [diff] [blame] | 492 | if (failed && !ret && failed_mirror) |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 493 | repair_eb_io_failure(root, eb, failed_mirror); |
| 494 | |
| 495 | return ret; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 496 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 497 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 498 | /* |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 499 | * checksum a dirty tree block before IO. This has extra checks to make sure |
| 500 | * we only fill in the checksum field in the first page of a multi-page block |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 501 | */ |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 502 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 503 | static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 504 | { |
Miao Xie | 4eee4fa | 2012-12-21 09:17:45 +0000 | [diff] [blame] | 505 | u64 start = page_offset(page); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 506 | u64 found_start; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 507 | struct extent_buffer *eb; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 508 | |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 509 | eb = (struct extent_buffer *)page->private; |
| 510 | if (page != eb->pages[0]) |
| 511 | return 0; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 512 | found_start = btrfs_header_bytenr(eb); |
Dulshani Gunawardhana | fae7f21 | 2013-10-31 10:30:08 +0530 | [diff] [blame] | 513 | if (WARN_ON(found_start != start || !PageUptodate(page))) |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 514 | return 0; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 515 | csum_tree_block(root, eb, 0); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 516 | return 0; |
| 517 | } |
| 518 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 519 | static int check_tree_block_fsid(struct btrfs_root *root, |
| 520 | struct extent_buffer *eb) |
| 521 | { |
| 522 | struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; |
| 523 | u8 fsid[BTRFS_UUID_SIZE]; |
| 524 | int ret = 1; |
| 525 | |
Ross Kirk | 0a4e558 | 2013-09-24 10:12:38 +0100 | [diff] [blame] | 526 | read_extent_buffer(eb, fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 527 | while (fs_devices) { |
| 528 | if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { |
| 529 | ret = 0; |
| 530 | break; |
| 531 | } |
| 532 | fs_devices = fs_devices->seed; |
| 533 | } |
| 534 | return ret; |
| 535 | } |
| 536 | |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 537 | #define CORRUPT(reason, eb, root, slot) \ |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 538 | btrfs_crit(root->fs_info, "corrupt leaf, %s: block=%llu," \ |
| 539 | "root=%llu, slot=%d", reason, \ |
Geert Uytterhoeven | c1c9ff7 | 2013-08-20 13:20:07 +0200 | [diff] [blame] | 540 | btrfs_header_bytenr(eb), root->objectid, slot) |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 541 | |
| 542 | static noinline int check_leaf(struct btrfs_root *root, |
| 543 | struct extent_buffer *leaf) |
| 544 | { |
| 545 | struct btrfs_key key; |
| 546 | struct btrfs_key leaf_key; |
| 547 | u32 nritems = btrfs_header_nritems(leaf); |
| 548 | int slot; |
| 549 | |
| 550 | if (nritems == 0) |
| 551 | return 0; |
| 552 | |
| 553 | /* Check the 0 item */ |
| 554 | if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != |
| 555 | BTRFS_LEAF_DATA_SIZE(root)) { |
| 556 | CORRUPT("invalid item offset size pair", leaf, root, 0); |
| 557 | return -EIO; |
| 558 | } |
| 559 | |
| 560 | /* |
| 561 | * Check to make sure each items keys are in the correct order and their |
| 562 | * offsets make sense. We only have to loop through nritems-1 because |
| 563 | * we check the current slot against the next slot, which verifies the |
| 564 | * next slot's offset+size makes sense and that the current's slot |
| 565 | * offset is correct. |
| 566 | */ |
| 567 | for (slot = 0; slot < nritems - 1; slot++) { |
| 568 | btrfs_item_key_to_cpu(leaf, &leaf_key, slot); |
| 569 | btrfs_item_key_to_cpu(leaf, &key, slot + 1); |
| 570 | |
| 571 | /* Make sure the keys are in the right order */ |
| 572 | if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { |
| 573 | CORRUPT("bad key order", leaf, root, slot); |
| 574 | return -EIO; |
| 575 | } |
| 576 | |
| 577 | /* |
| 578 | * Make sure the offset and ends are right, remember that the |
| 579 | * item data starts at the end of the leaf and grows towards the |
| 580 | * front. |
| 581 | */ |
| 582 | if (btrfs_item_offset_nr(leaf, slot) != |
| 583 | btrfs_item_end_nr(leaf, slot + 1)) { |
| 584 | CORRUPT("slot offset bad", leaf, root, slot); |
| 585 | return -EIO; |
| 586 | } |
| 587 | |
| 588 | /* |
| 589 | * Check to make sure that we don't point outside of the leaf, |
| 590 | * just incase all the items are consistent to eachother, but |
| 591 | * all point outside of the leaf. |
| 592 | */ |
| 593 | if (btrfs_item_end_nr(leaf, slot) > |
| 594 | BTRFS_LEAF_DATA_SIZE(root)) { |
| 595 | CORRUPT("slot end outside of leaf", leaf, root, slot); |
| 596 | return -EIO; |
| 597 | } |
| 598 | } |
| 599 | |
| 600 | return 0; |
| 601 | } |
| 602 | |
Miao Xie | facc8a22 | 2013-07-25 19:22:34 +0800 | [diff] [blame] | 603 | static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio, |
| 604 | u64 phy_offset, struct page *page, |
| 605 | u64 start, u64 end, int mirror) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 606 | { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 607 | u64 found_start; |
| 608 | int found_level; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 609 | struct extent_buffer *eb; |
| 610 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 611 | int ret = 0; |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 612 | int reads_done; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 613 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 614 | if (!page->private) |
| 615 | goto out; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 616 | |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 617 | eb = (struct extent_buffer *)page->private; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 618 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 619 | /* the pending IO might have been the only thing that kept this buffer |
| 620 | * in memory. Make sure we have a ref for all this other checks |
| 621 | */ |
| 622 | extent_buffer_get(eb); |
| 623 | |
| 624 | reads_done = atomic_dec_and_test(&eb->io_pages); |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 625 | if (!reads_done) |
| 626 | goto err; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 627 | |
Josef Bacik | 5cf1ab5 | 2012-04-16 09:42:26 -0400 | [diff] [blame] | 628 | eb->read_mirror = mirror; |
Filipe Manana | 656f30d | 2014-09-26 12:25:56 +0100 | [diff] [blame] | 629 | if (test_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags)) { |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 630 | ret = -EIO; |
| 631 | goto err; |
| 632 | } |
| 633 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 634 | found_start = btrfs_header_bytenr(eb); |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 635 | if (found_start != eb->start) { |
Wang Shilong | 29549ae | 2014-07-04 17:59:06 +0800 | [diff] [blame] | 636 | printk_ratelimited(KERN_INFO "BTRFS (device %s): bad tree block start " |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 637 | "%llu %llu\n", |
Wang Shilong | 29549ae | 2014-07-04 17:59:06 +0800 | [diff] [blame] | 638 | eb->fs_info->sb->s_id, found_start, eb->start); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 639 | ret = -EIO; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 640 | goto err; |
| 641 | } |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 642 | if (check_tree_block_fsid(root, eb)) { |
Wang Shilong | 29549ae | 2014-07-04 17:59:06 +0800 | [diff] [blame] | 643 | printk_ratelimited(KERN_INFO "BTRFS (device %s): bad fsid on block %llu\n", |
| 644 | eb->fs_info->sb->s_id, eb->start); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 645 | ret = -EIO; |
| 646 | goto err; |
| 647 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 648 | found_level = btrfs_header_level(eb); |
Josef Bacik | 1c24c3c | 2013-04-23 11:30:14 -0400 | [diff] [blame] | 649 | if (found_level >= BTRFS_MAX_LEVEL) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 650 | btrfs_info(root->fs_info, "bad tree block level %d", |
Josef Bacik | 1c24c3c | 2013-04-23 11:30:14 -0400 | [diff] [blame] | 651 | (int)btrfs_header_level(eb)); |
| 652 | ret = -EIO; |
| 653 | goto err; |
| 654 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 655 | |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 656 | btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), |
| 657 | eb, found_level); |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 658 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 659 | ret = csum_tree_block(root, eb, 1); |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 660 | if (ret) { |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 661 | ret = -EIO; |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 662 | goto err; |
| 663 | } |
| 664 | |
| 665 | /* |
| 666 | * If this is a leaf block and it is corrupt, set the corrupt bit so |
| 667 | * that we don't try and read the other copies of this block, just |
| 668 | * return -EIO. |
| 669 | */ |
| 670 | if (found_level == 0 && check_leaf(root, eb)) { |
| 671 | set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); |
| 672 | ret = -EIO; |
| 673 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 674 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 675 | if (!ret) |
| 676 | set_extent_buffer_uptodate(eb); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 677 | err: |
Josef Bacik | 79fb65a | 2013-04-20 10:18:27 -0400 | [diff] [blame] | 678 | if (reads_done && |
| 679 | test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 680 | btree_readahead_hook(root, eb, eb->start, ret); |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 681 | |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 682 | if (ret) { |
| 683 | /* |
| 684 | * our io error hook is going to dec the io pages |
| 685 | * again, we have to make sure it has something |
| 686 | * to decrement |
| 687 | */ |
| 688 | atomic_inc(&eb->io_pages); |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 689 | clear_extent_buffer_uptodate(eb); |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 690 | } |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 691 | free_extent_buffer(eb); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 692 | out: |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 693 | return ret; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 694 | } |
| 695 | |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 696 | static int btree_io_failed_hook(struct page *page, int failed_mirror) |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 697 | { |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 698 | struct extent_buffer *eb; |
| 699 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
| 700 | |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 701 | eb = (struct extent_buffer *)page->private; |
Filipe Manana | 656f30d | 2014-09-26 12:25:56 +0100 | [diff] [blame] | 702 | set_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags); |
Josef Bacik | 5cf1ab5 | 2012-04-16 09:42:26 -0400 | [diff] [blame] | 703 | eb->read_mirror = failed_mirror; |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 704 | atomic_dec(&eb->io_pages); |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 705 | if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 706 | btree_readahead_hook(root, eb, eb->start, -EIO); |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 707 | return -EIO; /* we fixed nothing */ |
| 708 | } |
| 709 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 710 | static void end_workqueue_bio(struct bio *bio, int err) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 711 | { |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 712 | struct btrfs_end_io_wq *end_io_wq = bio->bi_private; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 713 | struct btrfs_fs_info *fs_info; |
Liu Bo | 9e0af23 | 2014-08-15 23:36:53 +0800 | [diff] [blame] | 714 | struct btrfs_workqueue *wq; |
| 715 | btrfs_work_func_t func; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 716 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 717 | fs_info = end_io_wq->info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 718 | end_io_wq->error = err; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 719 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 720 | if (bio->bi_rw & REQ_WRITE) { |
Liu Bo | 9e0af23 | 2014-08-15 23:36:53 +0800 | [diff] [blame] | 721 | if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) { |
| 722 | wq = fs_info->endio_meta_write_workers; |
| 723 | func = btrfs_endio_meta_write_helper; |
| 724 | } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) { |
| 725 | wq = fs_info->endio_freespace_worker; |
| 726 | func = btrfs_freespace_write_helper; |
| 727 | } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) { |
| 728 | wq = fs_info->endio_raid56_workers; |
| 729 | func = btrfs_endio_raid56_helper; |
| 730 | } else { |
| 731 | wq = fs_info->endio_write_workers; |
| 732 | func = btrfs_endio_write_helper; |
| 733 | } |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 734 | } else { |
Miao Xie | 8b110e3 | 2014-09-12 18:44:03 +0800 | [diff] [blame] | 735 | if (unlikely(end_io_wq->metadata == |
| 736 | BTRFS_WQ_ENDIO_DIO_REPAIR)) { |
| 737 | wq = fs_info->endio_repair_workers; |
| 738 | func = btrfs_endio_repair_helper; |
| 739 | } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) { |
Liu Bo | 9e0af23 | 2014-08-15 23:36:53 +0800 | [diff] [blame] | 740 | wq = fs_info->endio_raid56_workers; |
| 741 | func = btrfs_endio_raid56_helper; |
| 742 | } else if (end_io_wq->metadata) { |
| 743 | wq = fs_info->endio_meta_workers; |
| 744 | func = btrfs_endio_meta_helper; |
| 745 | } else { |
| 746 | wq = fs_info->endio_workers; |
| 747 | func = btrfs_endio_helper; |
| 748 | } |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 749 | } |
Liu Bo | 9e0af23 | 2014-08-15 23:36:53 +0800 | [diff] [blame] | 750 | |
| 751 | btrfs_init_work(&end_io_wq->work, func, end_workqueue_fn, NULL, NULL); |
| 752 | btrfs_queue_work(wq, &end_io_wq->work); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 753 | } |
| 754 | |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 755 | int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, |
David Sterba | bfebd8b | 2014-07-30 00:25:45 +0200 | [diff] [blame] | 756 | enum btrfs_wq_endio_type metadata) |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 757 | { |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 758 | struct btrfs_end_io_wq *end_io_wq; |
Miao Xie | 8b110e3 | 2014-09-12 18:44:03 +0800 | [diff] [blame] | 759 | |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 760 | end_io_wq = kmem_cache_alloc(btrfs_end_io_wq_cache, GFP_NOFS); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 761 | if (!end_io_wq) |
| 762 | return -ENOMEM; |
| 763 | |
| 764 | end_io_wq->private = bio->bi_private; |
| 765 | end_io_wq->end_io = bio->bi_end_io; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 766 | end_io_wq->info = info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 767 | end_io_wq->error = 0; |
| 768 | end_io_wq->bio = bio; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 769 | end_io_wq->metadata = metadata; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 770 | |
| 771 | bio->bi_private = end_io_wq; |
| 772 | bio->bi_end_io = end_workqueue_bio; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 773 | return 0; |
| 774 | } |
| 775 | |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 776 | unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 777 | { |
| 778 | unsigned long limit = min_t(unsigned long, |
Qu Wenruo | 5cdc7ad3 | 2014-02-28 10:46:06 +0800 | [diff] [blame] | 779 | info->thread_pool_size, |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 780 | info->fs_devices->open_devices); |
| 781 | return 256 * limit; |
| 782 | } |
| 783 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 784 | static void run_one_async_start(struct btrfs_work *work) |
| 785 | { |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 786 | struct async_submit_bio *async; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 787 | int ret; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 788 | |
| 789 | async = container_of(work, struct async_submit_bio, work); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 790 | ret = async->submit_bio_start(async->inode, async->rw, async->bio, |
| 791 | async->mirror_num, async->bio_flags, |
| 792 | async->bio_offset); |
| 793 | if (ret) |
| 794 | async->error = ret; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 795 | } |
| 796 | |
| 797 | static void run_one_async_done(struct btrfs_work *work) |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 798 | { |
| 799 | struct btrfs_fs_info *fs_info; |
| 800 | struct async_submit_bio *async; |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 801 | int limit; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 802 | |
| 803 | async = container_of(work, struct async_submit_bio, work); |
| 804 | fs_info = BTRFS_I(async->inode)->root->fs_info; |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 805 | |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 806 | limit = btrfs_async_submit_limit(fs_info); |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 807 | limit = limit * 2 / 3; |
| 808 | |
Josef Bacik | 66657b3 | 2012-08-01 15:36:24 -0400 | [diff] [blame] | 809 | if (atomic_dec_return(&fs_info->nr_async_submits) < limit && |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 810 | waitqueue_active(&fs_info->async_submit_wait)) |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 811 | wake_up(&fs_info->async_submit_wait); |
| 812 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 813 | /* If an error occured we just want to clean up the bio and move on */ |
| 814 | if (async->error) { |
| 815 | bio_endio(async->bio, async->error); |
| 816 | return; |
| 817 | } |
| 818 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 819 | async->submit_bio_done(async->inode, async->rw, async->bio, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 820 | async->mirror_num, async->bio_flags, |
| 821 | async->bio_offset); |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 822 | } |
| 823 | |
| 824 | static void run_one_async_free(struct btrfs_work *work) |
| 825 | { |
| 826 | struct async_submit_bio *async; |
| 827 | |
| 828 | async = container_of(work, struct async_submit_bio, work); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 829 | kfree(async); |
| 830 | } |
| 831 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 832 | int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, |
| 833 | int rw, struct bio *bio, int mirror_num, |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 834 | unsigned long bio_flags, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 835 | u64 bio_offset, |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 836 | extent_submit_bio_hook_t *submit_bio_start, |
| 837 | extent_submit_bio_hook_t *submit_bio_done) |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 838 | { |
| 839 | struct async_submit_bio *async; |
| 840 | |
| 841 | async = kmalloc(sizeof(*async), GFP_NOFS); |
| 842 | if (!async) |
| 843 | return -ENOMEM; |
| 844 | |
| 845 | async->inode = inode; |
| 846 | async->rw = rw; |
| 847 | async->bio = bio; |
| 848 | async->mirror_num = mirror_num; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 849 | async->submit_bio_start = submit_bio_start; |
| 850 | async->submit_bio_done = submit_bio_done; |
| 851 | |
Liu Bo | 9e0af23 | 2014-08-15 23:36:53 +0800 | [diff] [blame] | 852 | btrfs_init_work(&async->work, btrfs_worker_helper, run_one_async_start, |
Qu Wenruo | 5cdc7ad3 | 2014-02-28 10:46:06 +0800 | [diff] [blame] | 853 | run_one_async_done, run_one_async_free); |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 854 | |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 855 | async->bio_flags = bio_flags; |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 856 | async->bio_offset = bio_offset; |
Chris Mason | 8c8bee1 | 2008-09-29 11:19:10 -0400 | [diff] [blame] | 857 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 858 | async->error = 0; |
| 859 | |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 860 | atomic_inc(&fs_info->nr_async_submits); |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 861 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 862 | if (rw & REQ_SYNC) |
Qu Wenruo | 5cdc7ad3 | 2014-02-28 10:46:06 +0800 | [diff] [blame] | 863 | btrfs_set_work_high_priority(&async->work); |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 864 | |
Qu Wenruo | 5cdc7ad3 | 2014-02-28 10:46:06 +0800 | [diff] [blame] | 865 | btrfs_queue_work(fs_info->workers, &async->work); |
Chris Mason | 9473f16 | 2008-08-28 06:15:24 -0400 | [diff] [blame] | 866 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 867 | while (atomic_read(&fs_info->async_submit_draining) && |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 868 | atomic_read(&fs_info->nr_async_submits)) { |
| 869 | wait_event(fs_info->async_submit_wait, |
| 870 | (atomic_read(&fs_info->nr_async_submits) == 0)); |
| 871 | } |
| 872 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 873 | return 0; |
| 874 | } |
| 875 | |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 876 | static int btree_csum_one_bio(struct bio *bio) |
| 877 | { |
Kent Overstreet | 2c30c71 | 2013-11-07 12:20:26 -0800 | [diff] [blame] | 878 | struct bio_vec *bvec; |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 879 | struct btrfs_root *root; |
Kent Overstreet | 2c30c71 | 2013-11-07 12:20:26 -0800 | [diff] [blame] | 880 | int i, ret = 0; |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 881 | |
Kent Overstreet | 2c30c71 | 2013-11-07 12:20:26 -0800 | [diff] [blame] | 882 | bio_for_each_segment_all(bvec, bio, i) { |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 883 | root = BTRFS_I(bvec->bv_page->mapping->host)->root; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 884 | ret = csum_dirty_buffer(root, bvec->bv_page); |
| 885 | if (ret) |
| 886 | break; |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 887 | } |
Kent Overstreet | 2c30c71 | 2013-11-07 12:20:26 -0800 | [diff] [blame] | 888 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 889 | return ret; |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 890 | } |
| 891 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 892 | static int __btree_submit_bio_start(struct inode *inode, int rw, |
| 893 | struct bio *bio, int mirror_num, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 894 | unsigned long bio_flags, |
| 895 | u64 bio_offset) |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 896 | { |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 897 | /* |
| 898 | * when we're called for a write, we're already in the async |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 899 | * submission context. Just jump into btrfs_map_bio |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 900 | */ |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 901 | return btree_csum_one_bio(bio); |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 902 | } |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 903 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 904 | static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 905 | int mirror_num, unsigned long bio_flags, |
| 906 | u64 bio_offset) |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 907 | { |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 908 | int ret; |
| 909 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 910 | /* |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 911 | * when we're called for a write, we're already in the async |
| 912 | * submission context. Just jump into btrfs_map_bio |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 913 | */ |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 914 | ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); |
| 915 | if (ret) |
| 916 | bio_endio(bio, ret); |
| 917 | return ret; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 918 | } |
| 919 | |
Josef Bacik | de0022b | 2012-09-25 14:25:58 -0400 | [diff] [blame] | 920 | static int check_async_write(struct inode *inode, unsigned long bio_flags) |
| 921 | { |
| 922 | if (bio_flags & EXTENT_BIO_TREE_LOG) |
| 923 | return 0; |
| 924 | #ifdef CONFIG_X86 |
| 925 | if (cpu_has_xmm4_2) |
| 926 | return 0; |
| 927 | #endif |
| 928 | return 1; |
| 929 | } |
| 930 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 931 | static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 932 | int mirror_num, unsigned long bio_flags, |
| 933 | u64 bio_offset) |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 934 | { |
Josef Bacik | de0022b | 2012-09-25 14:25:58 -0400 | [diff] [blame] | 935 | int async = check_async_write(inode, bio_flags); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 936 | int ret; |
| 937 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 938 | if (!(rw & REQ_WRITE)) { |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 939 | /* |
| 940 | * called for a read, do the setup so that checksum validation |
| 941 | * can happen in the async kernel threads |
| 942 | */ |
Chris Mason | f3f266a | 2012-03-23 10:22:46 -0400 | [diff] [blame] | 943 | ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, |
David Sterba | bfebd8b | 2014-07-30 00:25:45 +0200 | [diff] [blame] | 944 | bio, BTRFS_WQ_ENDIO_METADATA); |
Chris Mason | 1d4284b | 2012-03-28 20:31:37 -0400 | [diff] [blame] | 945 | if (ret) |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 946 | goto out_w_error; |
| 947 | ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, |
| 948 | mirror_num, 0); |
Josef Bacik | de0022b | 2012-09-25 14:25:58 -0400 | [diff] [blame] | 949 | } else if (!async) { |
| 950 | ret = btree_csum_one_bio(bio); |
| 951 | if (ret) |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 952 | goto out_w_error; |
| 953 | ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, |
| 954 | mirror_num, 0); |
| 955 | } else { |
| 956 | /* |
| 957 | * kthread helpers are used to submit writes so that |
| 958 | * checksumming can happen in parallel across all CPUs |
| 959 | */ |
| 960 | ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, |
| 961 | inode, rw, bio, mirror_num, 0, |
| 962 | bio_offset, |
| 963 | __btree_submit_bio_start, |
| 964 | __btree_submit_bio_done); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 965 | } |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 966 | |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 967 | if (ret) { |
| 968 | out_w_error: |
| 969 | bio_endio(bio, ret); |
| 970 | } |
| 971 | return ret; |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 972 | } |
| 973 | |
Jan Beulich | 3dd1462 | 2010-12-07 14:54:09 +0000 | [diff] [blame] | 974 | #ifdef CONFIG_MIGRATION |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 975 | static int btree_migratepage(struct address_space *mapping, |
Mel Gorman | a6bc32b | 2012-01-12 17:19:43 -0800 | [diff] [blame] | 976 | struct page *newpage, struct page *page, |
| 977 | enum migrate_mode mode) |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 978 | { |
| 979 | /* |
| 980 | * we can't safely write a btree page from here, |
| 981 | * we haven't done the locking hook |
| 982 | */ |
| 983 | if (PageDirty(page)) |
| 984 | return -EAGAIN; |
| 985 | /* |
| 986 | * Buffers may be managed in a filesystem specific way. |
| 987 | * We must have no buffers or drop them. |
| 988 | */ |
| 989 | if (page_has_private(page) && |
| 990 | !try_to_release_page(page, GFP_KERNEL)) |
| 991 | return -EAGAIN; |
Mel Gorman | a6bc32b | 2012-01-12 17:19:43 -0800 | [diff] [blame] | 992 | return migrate_page(mapping, newpage, page, mode); |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 993 | } |
Jan Beulich | 3dd1462 | 2010-12-07 14:54:09 +0000 | [diff] [blame] | 994 | #endif |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 995 | |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 996 | |
| 997 | static int btree_writepages(struct address_space *mapping, |
| 998 | struct writeback_control *wbc) |
| 999 | { |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 1000 | struct btrfs_fs_info *fs_info; |
| 1001 | int ret; |
| 1002 | |
Chris Mason | d8d5f3e | 2007-12-11 12:42:00 -0500 | [diff] [blame] | 1003 | if (wbc->sync_mode == WB_SYNC_NONE) { |
Chris Mason | 448d640 | 2007-11-27 07:52:01 -0800 | [diff] [blame] | 1004 | |
| 1005 | if (wbc->for_kupdate) |
| 1006 | return 0; |
| 1007 | |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 1008 | fs_info = BTRFS_I(mapping->host)->root->fs_info; |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 1009 | /* this is a bit racy, but that's ok */ |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 1010 | ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, |
| 1011 | BTRFS_DIRTY_METADATA_THRESH); |
| 1012 | if (ret < 0) |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 1013 | return 0; |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 1014 | } |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1015 | return btree_write_cache_pages(mapping, wbc); |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 1016 | } |
| 1017 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 1018 | static int btree_readpage(struct file *file, struct page *page) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1019 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1020 | struct extent_io_tree *tree; |
| 1021 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Jan Schmidt | 8ddc7d9 | 2011-06-13 20:02:58 +0200 | [diff] [blame] | 1022 | return extent_read_full_page(tree, page, btree_get_extent, 0); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1023 | } |
| 1024 | |
Chris Mason | 70dec80 | 2008-01-29 09:59:12 -0500 | [diff] [blame] | 1025 | static int btree_releasepage(struct page *page, gfp_t gfp_flags) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1026 | { |
Chris Mason | 98509cf | 2008-09-11 15:51:43 -0400 | [diff] [blame] | 1027 | if (PageWriteback(page) || PageDirty(page)) |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1028 | return 0; |
David Sterba | 0c4e538 | 2012-01-26 15:01:12 -0500 | [diff] [blame] | 1029 | |
David Sterba | f7a52a4 | 2013-04-26 14:56:29 +0000 | [diff] [blame] | 1030 | return try_release_extent_buffer(page); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1031 | } |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 1032 | |
Lukas Czerner | d47992f | 2013-05-21 23:17:23 -0400 | [diff] [blame] | 1033 | static void btree_invalidatepage(struct page *page, unsigned int offset, |
| 1034 | unsigned int length) |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1035 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1036 | struct extent_io_tree *tree; |
| 1037 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1038 | extent_invalidatepage(tree, page, offset); |
| 1039 | btree_releasepage(page, GFP_NOFS); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 1040 | if (PagePrivate(page)) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 1041 | btrfs_warn(BTRFS_I(page->mapping->host)->root->fs_info, |
| 1042 | "page private not zero on page %llu", |
| 1043 | (unsigned long long)page_offset(page)); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 1044 | ClearPagePrivate(page); |
| 1045 | set_page_private(page, 0); |
| 1046 | page_cache_release(page); |
| 1047 | } |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1048 | } |
| 1049 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1050 | static int btree_set_page_dirty(struct page *page) |
| 1051 | { |
Josef Bacik | bb146eb | 2012-10-15 13:30:43 -0400 | [diff] [blame] | 1052 | #ifdef DEBUG |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1053 | struct extent_buffer *eb; |
| 1054 | |
| 1055 | BUG_ON(!PagePrivate(page)); |
| 1056 | eb = (struct extent_buffer *)page->private; |
| 1057 | BUG_ON(!eb); |
| 1058 | BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); |
| 1059 | BUG_ON(!atomic_read(&eb->refs)); |
| 1060 | btrfs_assert_tree_locked(eb); |
Josef Bacik | bb146eb | 2012-10-15 13:30:43 -0400 | [diff] [blame] | 1061 | #endif |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1062 | return __set_page_dirty_nobuffers(page); |
| 1063 | } |
| 1064 | |
Alexey Dobriyan | 7f09410 | 2009-09-21 17:01:10 -0700 | [diff] [blame] | 1065 | static const struct address_space_operations btree_aops = { |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1066 | .readpage = btree_readpage, |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 1067 | .writepages = btree_writepages, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1068 | .releasepage = btree_releasepage, |
| 1069 | .invalidatepage = btree_invalidatepage, |
Chris Mason | 5a92bc8 | 2010-11-29 09:49:11 -0500 | [diff] [blame] | 1070 | #ifdef CONFIG_MIGRATION |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 1071 | .migratepage = btree_migratepage, |
Chris Mason | 5a92bc8 | 2010-11-29 09:49:11 -0500 | [diff] [blame] | 1072 | #endif |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1073 | .set_page_dirty = btree_set_page_dirty, |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1074 | }; |
| 1075 | |
David Sterba | 6197d86 | 2014-06-15 00:49:36 +0200 | [diff] [blame] | 1076 | void readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize) |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 1077 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1078 | struct extent_buffer *buf = NULL; |
| 1079 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 1080 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1081 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1082 | if (!buf) |
David Sterba | 6197d86 | 2014-06-15 00:49:36 +0200 | [diff] [blame] | 1083 | return; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1084 | read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, |
Arne Jansen | bb82ab8 | 2011-06-10 14:06:53 +0200 | [diff] [blame] | 1085 | buf, 0, WAIT_NONE, btree_get_extent, 0); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1086 | free_extent_buffer(buf); |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 1087 | } |
| 1088 | |
Arne Jansen | ab0fff0 | 2011-05-23 14:25:41 +0200 | [diff] [blame] | 1089 | int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, |
| 1090 | int mirror_num, struct extent_buffer **eb) |
| 1091 | { |
| 1092 | struct extent_buffer *buf = NULL; |
| 1093 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 1094 | struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; |
| 1095 | int ret; |
| 1096 | |
| 1097 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
| 1098 | if (!buf) |
| 1099 | return 0; |
| 1100 | |
| 1101 | set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); |
| 1102 | |
| 1103 | ret = read_extent_buffer_pages(io_tree, buf, 0, WAIT_PAGE_LOCK, |
| 1104 | btree_get_extent, mirror_num); |
| 1105 | if (ret) { |
| 1106 | free_extent_buffer(buf); |
| 1107 | return ret; |
| 1108 | } |
| 1109 | |
| 1110 | if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { |
| 1111 | free_extent_buffer(buf); |
| 1112 | return -EIO; |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1113 | } else if (extent_buffer_uptodate(buf)) { |
Arne Jansen | ab0fff0 | 2011-05-23 14:25:41 +0200 | [diff] [blame] | 1114 | *eb = buf; |
| 1115 | } else { |
| 1116 | free_extent_buffer(buf); |
| 1117 | } |
| 1118 | return 0; |
| 1119 | } |
| 1120 | |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 1121 | struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, |
David Sterba | 0308af4 | 2014-06-15 01:43:40 +0200 | [diff] [blame] | 1122 | u64 bytenr) |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 1123 | { |
Josef Bacik | f28491e | 2013-12-16 13:24:27 -0500 | [diff] [blame] | 1124 | return find_extent_buffer(root->fs_info, bytenr); |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 1125 | } |
| 1126 | |
| 1127 | struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, |
| 1128 | u64 bytenr, u32 blocksize) |
| 1129 | { |
David Sterba | fccb84c | 2014-09-29 23:53:21 +0200 | [diff] [blame] | 1130 | if (btrfs_test_is_dummy_root(root)) |
Josef Bacik | faa2dbf | 2014-05-07 17:06:09 -0400 | [diff] [blame] | 1131 | return alloc_test_extent_buffer(root->fs_info, bytenr, |
| 1132 | blocksize); |
Josef Bacik | f28491e | 2013-12-16 13:24:27 -0500 | [diff] [blame] | 1133 | return alloc_extent_buffer(root->fs_info, bytenr, blocksize); |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 1134 | } |
| 1135 | |
| 1136 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1137 | int btrfs_write_tree_block(struct extent_buffer *buf) |
| 1138 | { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 1139 | return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, |
Christoph Hellwig | 8aa38c3 | 2009-10-01 12:58:30 -0400 | [diff] [blame] | 1140 | buf->start + buf->len - 1); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1141 | } |
| 1142 | |
| 1143 | int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) |
| 1144 | { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 1145 | return filemap_fdatawait_range(buf->pages[0]->mapping, |
Christoph Hellwig | 8aa38c3 | 2009-10-01 12:58:30 -0400 | [diff] [blame] | 1146 | buf->start, buf->start + buf->len - 1); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1147 | } |
| 1148 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1149 | struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, |
David Sterba | ce86cd5 | 2014-06-15 01:07:32 +0200 | [diff] [blame] | 1150 | u64 parent_transid) |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1151 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1152 | struct extent_buffer *buf = NULL; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1153 | int ret; |
| 1154 | |
David Sterba | ce86cd5 | 2014-06-15 01:07:32 +0200 | [diff] [blame] | 1155 | buf = btrfs_find_create_tree_block(root, bytenr, root->nodesize); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1156 | if (!buf) |
| 1157 | return NULL; |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 1158 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 1159 | ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
Filipe David Borba Manana | 0f0fe8f | 2013-07-31 00:39:56 +0100 | [diff] [blame] | 1160 | if (ret) { |
| 1161 | free_extent_buffer(buf); |
| 1162 | return NULL; |
| 1163 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1164 | return buf; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1165 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1166 | } |
| 1167 | |
Jeff Mahoney | d5c13f9 | 2012-03-01 14:56:27 +0100 | [diff] [blame] | 1168 | void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 1169 | struct extent_buffer *buf) |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 1170 | { |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 1171 | struct btrfs_fs_info *fs_info = root->fs_info; |
| 1172 | |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 1173 | if (btrfs_header_generation(buf) == |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 1174 | fs_info->running_transaction->transid) { |
Chris Mason | b9447ef | 2009-03-09 11:45:38 -0400 | [diff] [blame] | 1175 | btrfs_assert_tree_locked(buf); |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 1176 | |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 1177 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 1178 | __percpu_counter_add(&fs_info->dirty_metadata_bytes, |
| 1179 | -buf->len, |
| 1180 | fs_info->dirty_metadata_batch); |
Josef Bacik | ed7b63e | 2012-10-15 13:33:54 -0400 | [diff] [blame] | 1181 | /* ugh, clear_extent_buffer_dirty needs to lock the page */ |
| 1182 | btrfs_set_lock_blocking(buf); |
| 1183 | clear_extent_buffer_dirty(buf); |
| 1184 | } |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1185 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1186 | } |
| 1187 | |
Miao Xie | 8257b2d | 2014-03-06 13:38:19 +0800 | [diff] [blame] | 1188 | static struct btrfs_subvolume_writers *btrfs_alloc_subvolume_writers(void) |
| 1189 | { |
| 1190 | struct btrfs_subvolume_writers *writers; |
| 1191 | int ret; |
| 1192 | |
| 1193 | writers = kmalloc(sizeof(*writers), GFP_NOFS); |
| 1194 | if (!writers) |
| 1195 | return ERR_PTR(-ENOMEM); |
| 1196 | |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 1197 | ret = percpu_counter_init(&writers->counter, 0, GFP_KERNEL); |
Miao Xie | 8257b2d | 2014-03-06 13:38:19 +0800 | [diff] [blame] | 1198 | if (ret < 0) { |
| 1199 | kfree(writers); |
| 1200 | return ERR_PTR(ret); |
| 1201 | } |
| 1202 | |
| 1203 | init_waitqueue_head(&writers->wait); |
| 1204 | return writers; |
| 1205 | } |
| 1206 | |
| 1207 | static void |
| 1208 | btrfs_free_subvolume_writers(struct btrfs_subvolume_writers *writers) |
| 1209 | { |
| 1210 | percpu_counter_destroy(&writers->counter); |
| 1211 | kfree(writers); |
| 1212 | } |
| 1213 | |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 1214 | static void __setup_root(u32 nodesize, u32 sectorsize, u32 stripesize, |
| 1215 | struct btrfs_root *root, struct btrfs_fs_info *fs_info, |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 1216 | u64 objectid) |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 1217 | { |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 1218 | root->node = NULL; |
Chris Mason | a28ec19 | 2007-03-06 20:08:01 -0500 | [diff] [blame] | 1219 | root->commit_root = NULL; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1220 | root->sectorsize = sectorsize; |
| 1221 | root->nodesize = nodesize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1222 | root->stripesize = stripesize; |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 1223 | root->state = 0; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1224 | root->orphan_cleanup_state = 0; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1225 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1226 | root->objectid = objectid; |
| 1227 | root->last_trans = 0; |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1228 | root->highest_objectid = 0; |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 1229 | root->nr_delalloc_inodes = 0; |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 1230 | root->nr_ordered_extents = 0; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1231 | root->name = NULL; |
Eric Paris | 6bef4d3 | 2010-02-23 19:43:04 +0000 | [diff] [blame] | 1232 | root->inode_tree = RB_ROOT; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 1233 | INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1234 | root->block_rsv = NULL; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1235 | root->orphan_block_rsv = NULL; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1236 | |
| 1237 | INIT_LIST_HEAD(&root->dirty_list); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1238 | INIT_LIST_HEAD(&root->root_list); |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 1239 | INIT_LIST_HEAD(&root->delalloc_inodes); |
| 1240 | INIT_LIST_HEAD(&root->delalloc_root); |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 1241 | INIT_LIST_HEAD(&root->ordered_extents); |
| 1242 | INIT_LIST_HEAD(&root->ordered_root); |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 1243 | INIT_LIST_HEAD(&root->logged_list[0]); |
| 1244 | INIT_LIST_HEAD(&root->logged_list[1]); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1245 | spin_lock_init(&root->orphan_lock); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1246 | spin_lock_init(&root->inode_lock); |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 1247 | spin_lock_init(&root->delalloc_lock); |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 1248 | spin_lock_init(&root->ordered_extent_lock); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1249 | spin_lock_init(&root->accounting_lock); |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 1250 | spin_lock_init(&root->log_extents_lock[0]); |
| 1251 | spin_lock_init(&root->log_extents_lock[1]); |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1252 | mutex_init(&root->objectid_mutex); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1253 | mutex_init(&root->log_mutex); |
Miao Xie | 31f3d25 | 2014-03-06 13:55:02 +0800 | [diff] [blame] | 1254 | mutex_init(&root->ordered_extent_mutex); |
Miao Xie | 573bfb7 | 2014-03-06 13:55:03 +0800 | [diff] [blame] | 1255 | mutex_init(&root->delalloc_mutex); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1256 | init_waitqueue_head(&root->log_writer_wait); |
| 1257 | init_waitqueue_head(&root->log_commit_wait[0]); |
| 1258 | init_waitqueue_head(&root->log_commit_wait[1]); |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 1259 | INIT_LIST_HEAD(&root->log_ctxs[0]); |
| 1260 | INIT_LIST_HEAD(&root->log_ctxs[1]); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1261 | atomic_set(&root->log_commit[0], 0); |
| 1262 | atomic_set(&root->log_commit[1], 0); |
| 1263 | atomic_set(&root->log_writers, 0); |
Miao Xie | 2ecb792 | 2012-09-06 04:04:27 -0600 | [diff] [blame] | 1264 | atomic_set(&root->log_batch, 0); |
Josef Bacik | 8a35d95 | 2012-05-23 14:26:42 -0400 | [diff] [blame] | 1265 | atomic_set(&root->orphan_inodes, 0); |
Miao Xie | b0feb9d | 2013-05-15 07:48:20 +0000 | [diff] [blame] | 1266 | atomic_set(&root->refs, 1); |
Miao Xie | 8257b2d | 2014-03-06 13:38:19 +0800 | [diff] [blame] | 1267 | atomic_set(&root->will_be_snapshoted, 0); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1268 | root->log_transid = 0; |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 1269 | root->log_transid_committed = -1; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 1270 | root->last_log_commit = 0; |
Josef Bacik | 06ea65a | 2013-09-19 16:07:01 -0400 | [diff] [blame] | 1271 | if (fs_info) |
| 1272 | extent_io_tree_init(&root->dirty_log_pages, |
| 1273 | fs_info->btree_inode->i_mapping); |
Chris Mason | 017e536 | 2008-07-28 15:32:51 -0400 | [diff] [blame] | 1274 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1275 | memset(&root->root_key, 0, sizeof(root->root_key)); |
| 1276 | memset(&root->root_item, 0, sizeof(root->root_item)); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 1277 | memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1278 | memset(&root->root_kobj, 0, sizeof(root->root_kobj)); |
Josef Bacik | 06ea65a | 2013-09-19 16:07:01 -0400 | [diff] [blame] | 1279 | if (fs_info) |
| 1280 | root->defrag_trans_start = fs_info->generation; |
| 1281 | else |
| 1282 | root->defrag_trans_start = 0; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1283 | init_completion(&root->kobj_unregister); |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 1284 | root->root_key.objectid = objectid; |
Al Viro | 0ee5dc6 | 2011-07-07 15:44:25 -0400 | [diff] [blame] | 1285 | root->anon_dev = 0; |
Alexander Block | 8ea05e3 | 2012-07-25 17:35:53 +0200 | [diff] [blame] | 1286 | |
Anand Jain | 5f3ab90 | 2012-12-07 09:28:54 +0000 | [diff] [blame] | 1287 | spin_lock_init(&root->root_item_lock); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1288 | } |
| 1289 | |
Al Viro | f84a8bd | 2011-11-17 15:57:57 -0500 | [diff] [blame] | 1290 | static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info) |
Al Viro | 6f07e42 | 2011-11-17 00:46:16 -0500 | [diff] [blame] | 1291 | { |
| 1292 | struct btrfs_root *root = kzalloc(sizeof(*root), GFP_NOFS); |
| 1293 | if (root) |
| 1294 | root->fs_info = fs_info; |
| 1295 | return root; |
| 1296 | } |
| 1297 | |
Josef Bacik | 06ea65a | 2013-09-19 16:07:01 -0400 | [diff] [blame] | 1298 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
| 1299 | /* Should only be used by the testing infrastructure */ |
| 1300 | struct btrfs_root *btrfs_alloc_dummy_root(void) |
| 1301 | { |
| 1302 | struct btrfs_root *root; |
| 1303 | |
| 1304 | root = btrfs_alloc_root(NULL); |
| 1305 | if (!root) |
| 1306 | return ERR_PTR(-ENOMEM); |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 1307 | __setup_root(4096, 4096, 4096, root, NULL, 1); |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 1308 | set_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state); |
Josef Bacik | faa2dbf | 2014-05-07 17:06:09 -0400 | [diff] [blame] | 1309 | root->alloc_bytenr = 0; |
Josef Bacik | 06ea65a | 2013-09-19 16:07:01 -0400 | [diff] [blame] | 1310 | |
| 1311 | return root; |
| 1312 | } |
| 1313 | #endif |
| 1314 | |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1315 | struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, |
| 1316 | struct btrfs_fs_info *fs_info, |
| 1317 | u64 objectid) |
| 1318 | { |
| 1319 | struct extent_buffer *leaf; |
| 1320 | struct btrfs_root *tree_root = fs_info->tree_root; |
| 1321 | struct btrfs_root *root; |
| 1322 | struct btrfs_key key; |
| 1323 | int ret = 0; |
Stefan Behrens | 6463fe5 | 2013-04-19 15:08:05 +0000 | [diff] [blame] | 1324 | uuid_le uuid; |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1325 | |
| 1326 | root = btrfs_alloc_root(fs_info); |
| 1327 | if (!root) |
| 1328 | return ERR_PTR(-ENOMEM); |
| 1329 | |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 1330 | __setup_root(tree_root->nodesize, tree_root->sectorsize, |
| 1331 | tree_root->stripesize, root, fs_info, objectid); |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1332 | root->root_key.objectid = objectid; |
| 1333 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; |
| 1334 | root->root_key.offset = 0; |
| 1335 | |
David Sterba | 4d75f8a | 2014-06-15 01:54:12 +0200 | [diff] [blame] | 1336 | leaf = btrfs_alloc_tree_block(trans, root, 0, objectid, NULL, 0, 0, 0); |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1337 | if (IS_ERR(leaf)) { |
| 1338 | ret = PTR_ERR(leaf); |
Tsutomu Itoh | 1dd0568 | 2013-03-21 04:32:32 +0000 | [diff] [blame] | 1339 | leaf = NULL; |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1340 | goto fail; |
| 1341 | } |
| 1342 | |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1343 | memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); |
| 1344 | btrfs_set_header_bytenr(leaf, leaf->start); |
| 1345 | btrfs_set_header_generation(leaf, trans->transid); |
| 1346 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); |
| 1347 | btrfs_set_header_owner(leaf, objectid); |
| 1348 | root->node = leaf; |
| 1349 | |
Ross Kirk | 0a4e558 | 2013-09-24 10:12:38 +0100 | [diff] [blame] | 1350 | write_extent_buffer(leaf, fs_info->fsid, btrfs_header_fsid(), |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1351 | BTRFS_FSID_SIZE); |
| 1352 | write_extent_buffer(leaf, fs_info->chunk_tree_uuid, |
Geert Uytterhoeven | b308bc2 | 2013-08-20 13:20:15 +0200 | [diff] [blame] | 1353 | btrfs_header_chunk_tree_uuid(leaf), |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1354 | BTRFS_UUID_SIZE); |
| 1355 | btrfs_mark_buffer_dirty(leaf); |
| 1356 | |
| 1357 | root->commit_root = btrfs_root_node(root); |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 1358 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1359 | |
| 1360 | root->root_item.flags = 0; |
| 1361 | root->root_item.byte_limit = 0; |
| 1362 | btrfs_set_root_bytenr(&root->root_item, leaf->start); |
| 1363 | btrfs_set_root_generation(&root->root_item, trans->transid); |
| 1364 | btrfs_set_root_level(&root->root_item, 0); |
| 1365 | btrfs_set_root_refs(&root->root_item, 1); |
| 1366 | btrfs_set_root_used(&root->root_item, leaf->len); |
| 1367 | btrfs_set_root_last_snapshot(&root->root_item, 0); |
| 1368 | btrfs_set_root_dirid(&root->root_item, 0); |
Stefan Behrens | 6463fe5 | 2013-04-19 15:08:05 +0000 | [diff] [blame] | 1369 | uuid_le_gen(&uuid); |
| 1370 | memcpy(root->root_item.uuid, uuid.b, BTRFS_UUID_SIZE); |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1371 | root->root_item.drop_level = 0; |
| 1372 | |
| 1373 | key.objectid = objectid; |
| 1374 | key.type = BTRFS_ROOT_ITEM_KEY; |
| 1375 | key.offset = 0; |
| 1376 | ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); |
| 1377 | if (ret) |
| 1378 | goto fail; |
| 1379 | |
| 1380 | btrfs_tree_unlock(leaf); |
| 1381 | |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1382 | return root; |
Tsutomu Itoh | 1dd0568 | 2013-03-21 04:32:32 +0000 | [diff] [blame] | 1383 | |
| 1384 | fail: |
| 1385 | if (leaf) { |
| 1386 | btrfs_tree_unlock(leaf); |
Tsutomu Itoh | 59885b3 | 2014-04-09 09:18:04 +0900 | [diff] [blame] | 1387 | free_extent_buffer(root->commit_root); |
Tsutomu Itoh | 1dd0568 | 2013-03-21 04:32:32 +0000 | [diff] [blame] | 1388 | free_extent_buffer(leaf); |
| 1389 | } |
| 1390 | kfree(root); |
| 1391 | |
| 1392 | return ERR_PTR(ret); |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1393 | } |
| 1394 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1395 | static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, |
| 1396 | struct btrfs_fs_info *fs_info) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1397 | { |
| 1398 | struct btrfs_root *root; |
| 1399 | struct btrfs_root *tree_root = fs_info->tree_root; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1400 | struct extent_buffer *leaf; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1401 | |
Al Viro | 6f07e42 | 2011-11-17 00:46:16 -0500 | [diff] [blame] | 1402 | root = btrfs_alloc_root(fs_info); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1403 | if (!root) |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1404 | return ERR_PTR(-ENOMEM); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1405 | |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 1406 | __setup_root(tree_root->nodesize, tree_root->sectorsize, |
| 1407 | tree_root->stripesize, root, fs_info, |
| 1408 | BTRFS_TREE_LOG_OBJECTID); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1409 | |
| 1410 | root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; |
| 1411 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; |
| 1412 | root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 1413 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1414 | /* |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 1415 | * DON'T set REF_COWS for log trees |
| 1416 | * |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1417 | * log trees do not get reference counted because they go away |
| 1418 | * before a real commit is actually done. They do store pointers |
| 1419 | * to file data extents, and those reference counts still get |
| 1420 | * updated (along with back refs to the log tree). |
| 1421 | */ |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1422 | |
David Sterba | 4d75f8a | 2014-06-15 01:54:12 +0200 | [diff] [blame] | 1423 | leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID, |
| 1424 | NULL, 0, 0, 0); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1425 | if (IS_ERR(leaf)) { |
| 1426 | kfree(root); |
| 1427 | return ERR_CAST(leaf); |
| 1428 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1429 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1430 | memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); |
| 1431 | btrfs_set_header_bytenr(leaf, leaf->start); |
| 1432 | btrfs_set_header_generation(leaf, trans->transid); |
| 1433 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); |
| 1434 | btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1435 | root->node = leaf; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1436 | |
| 1437 | write_extent_buffer(root->node, root->fs_info->fsid, |
Ross Kirk | 0a4e558 | 2013-09-24 10:12:38 +0100 | [diff] [blame] | 1438 | btrfs_header_fsid(), BTRFS_FSID_SIZE); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1439 | btrfs_mark_buffer_dirty(root->node); |
| 1440 | btrfs_tree_unlock(root->node); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1441 | return root; |
| 1442 | } |
| 1443 | |
| 1444 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, |
| 1445 | struct btrfs_fs_info *fs_info) |
| 1446 | { |
| 1447 | struct btrfs_root *log_root; |
| 1448 | |
| 1449 | log_root = alloc_log_tree(trans, fs_info); |
| 1450 | if (IS_ERR(log_root)) |
| 1451 | return PTR_ERR(log_root); |
| 1452 | WARN_ON(fs_info->log_root_tree); |
| 1453 | fs_info->log_root_tree = log_root; |
| 1454 | return 0; |
| 1455 | } |
| 1456 | |
| 1457 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, |
| 1458 | struct btrfs_root *root) |
| 1459 | { |
| 1460 | struct btrfs_root *log_root; |
| 1461 | struct btrfs_inode_item *inode_item; |
| 1462 | |
| 1463 | log_root = alloc_log_tree(trans, root->fs_info); |
| 1464 | if (IS_ERR(log_root)) |
| 1465 | return PTR_ERR(log_root); |
| 1466 | |
| 1467 | log_root->last_trans = trans->transid; |
| 1468 | log_root->root_key.offset = root->root_key.objectid; |
| 1469 | |
| 1470 | inode_item = &log_root->root_item.inode; |
Qu Wenruo | 3cae210 | 2013-07-16 11:19:18 +0800 | [diff] [blame] | 1471 | btrfs_set_stack_inode_generation(inode_item, 1); |
| 1472 | btrfs_set_stack_inode_size(inode_item, 3); |
| 1473 | btrfs_set_stack_inode_nlink(inode_item, 1); |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 1474 | btrfs_set_stack_inode_nbytes(inode_item, root->nodesize); |
Qu Wenruo | 3cae210 | 2013-07-16 11:19:18 +0800 | [diff] [blame] | 1475 | btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1476 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1477 | btrfs_set_root_node(&log_root->root_item, log_root->node); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1478 | |
| 1479 | WARN_ON(root->log_root); |
| 1480 | root->log_root = log_root; |
| 1481 | root->log_transid = 0; |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 1482 | root->log_transid_committed = -1; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 1483 | root->last_log_commit = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1484 | return 0; |
| 1485 | } |
| 1486 | |
Stefan Behrens | 35a3621 | 2013-08-14 18:12:25 +0200 | [diff] [blame] | 1487 | static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, |
| 1488 | struct btrfs_key *key) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1489 | { |
| 1490 | struct btrfs_root *root; |
| 1491 | struct btrfs_fs_info *fs_info = tree_root->fs_info; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1492 | struct btrfs_path *path; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1493 | u64 generation; |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1494 | int ret; |
| 1495 | |
| 1496 | path = btrfs_alloc_path(); |
| 1497 | if (!path) |
| 1498 | return ERR_PTR(-ENOMEM); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1499 | |
Al Viro | 6f07e42 | 2011-11-17 00:46:16 -0500 | [diff] [blame] | 1500 | root = btrfs_alloc_root(fs_info); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1501 | if (!root) { |
| 1502 | ret = -ENOMEM; |
| 1503 | goto alloc_fail; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1504 | } |
| 1505 | |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 1506 | __setup_root(tree_root->nodesize, tree_root->sectorsize, |
| 1507 | tree_root->stripesize, root, fs_info, key->objectid); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1508 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1509 | ret = btrfs_find_root(tree_root, key, path, |
| 1510 | &root->root_item, &root->root_key); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1511 | if (ret) { |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1512 | if (ret > 0) |
| 1513 | ret = -ENOENT; |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1514 | goto find_fail; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1515 | } |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1516 | |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1517 | generation = btrfs_root_generation(&root->root_item); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1518 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), |
David Sterba | ce86cd5 | 2014-06-15 01:07:32 +0200 | [diff] [blame] | 1519 | generation); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1520 | if (!root->node) { |
| 1521 | ret = -ENOMEM; |
| 1522 | goto find_fail; |
| 1523 | } else if (!btrfs_buffer_uptodate(root->node, generation, 0)) { |
| 1524 | ret = -EIO; |
| 1525 | goto read_fail; |
Josef Bacik | 416bc65 | 2013-04-23 14:17:42 -0400 | [diff] [blame] | 1526 | } |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1527 | root->commit_root = btrfs_root_node(root); |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1528 | out: |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1529 | btrfs_free_path(path); |
| 1530 | return root; |
| 1531 | |
| 1532 | read_fail: |
| 1533 | free_extent_buffer(root->node); |
| 1534 | find_fail: |
| 1535 | kfree(root); |
| 1536 | alloc_fail: |
| 1537 | root = ERR_PTR(ret); |
| 1538 | goto out; |
| 1539 | } |
| 1540 | |
| 1541 | struct btrfs_root *btrfs_read_fs_root(struct btrfs_root *tree_root, |
| 1542 | struct btrfs_key *location) |
| 1543 | { |
| 1544 | struct btrfs_root *root; |
| 1545 | |
| 1546 | root = btrfs_read_tree_root(tree_root, location); |
| 1547 | if (IS_ERR(root)) |
| 1548 | return root; |
| 1549 | |
| 1550 | if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) { |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 1551 | set_bit(BTRFS_ROOT_REF_COWS, &root->state); |
Li Zefan | 08fe4db | 2011-03-28 02:01:25 +0000 | [diff] [blame] | 1552 | btrfs_check_and_init_root_item(&root->root_item); |
| 1553 | } |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1554 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1555 | return root; |
| 1556 | } |
| 1557 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1558 | int btrfs_init_fs_root(struct btrfs_root *root) |
| 1559 | { |
| 1560 | int ret; |
Miao Xie | 8257b2d | 2014-03-06 13:38:19 +0800 | [diff] [blame] | 1561 | struct btrfs_subvolume_writers *writers; |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1562 | |
| 1563 | root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); |
| 1564 | root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), |
| 1565 | GFP_NOFS); |
| 1566 | if (!root->free_ino_pinned || !root->free_ino_ctl) { |
| 1567 | ret = -ENOMEM; |
| 1568 | goto fail; |
| 1569 | } |
| 1570 | |
Miao Xie | 8257b2d | 2014-03-06 13:38:19 +0800 | [diff] [blame] | 1571 | writers = btrfs_alloc_subvolume_writers(); |
| 1572 | if (IS_ERR(writers)) { |
| 1573 | ret = PTR_ERR(writers); |
| 1574 | goto fail; |
| 1575 | } |
| 1576 | root->subv_writers = writers; |
| 1577 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1578 | btrfs_init_free_ino_ctl(root); |
David Sterba | 57cdc8d | 2014-02-05 02:37:48 +0100 | [diff] [blame] | 1579 | spin_lock_init(&root->ino_cache_lock); |
| 1580 | init_waitqueue_head(&root->ino_cache_wait); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1581 | |
| 1582 | ret = get_anon_bdev(&root->anon_dev); |
| 1583 | if (ret) |
Miao Xie | 8257b2d | 2014-03-06 13:38:19 +0800 | [diff] [blame] | 1584 | goto free_writers; |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1585 | return 0; |
Miao Xie | 8257b2d | 2014-03-06 13:38:19 +0800 | [diff] [blame] | 1586 | |
| 1587 | free_writers: |
| 1588 | btrfs_free_subvolume_writers(root->subv_writers); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1589 | fail: |
| 1590 | kfree(root->free_ino_ctl); |
| 1591 | kfree(root->free_ino_pinned); |
| 1592 | return ret; |
| 1593 | } |
| 1594 | |
Sergei Trofimovich | 171170c | 2013-08-14 23:27:46 +0300 | [diff] [blame] | 1595 | static struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, |
| 1596 | u64 root_id) |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1597 | { |
| 1598 | struct btrfs_root *root; |
| 1599 | |
| 1600 | spin_lock(&fs_info->fs_roots_radix_lock); |
| 1601 | root = radix_tree_lookup(&fs_info->fs_roots_radix, |
| 1602 | (unsigned long)root_id); |
| 1603 | spin_unlock(&fs_info->fs_roots_radix_lock); |
| 1604 | return root; |
| 1605 | } |
| 1606 | |
| 1607 | int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, |
| 1608 | struct btrfs_root *root) |
| 1609 | { |
| 1610 | int ret; |
| 1611 | |
| 1612 | ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); |
| 1613 | if (ret) |
| 1614 | return ret; |
| 1615 | |
| 1616 | spin_lock(&fs_info->fs_roots_radix_lock); |
| 1617 | ret = radix_tree_insert(&fs_info->fs_roots_radix, |
| 1618 | (unsigned long)root->root_key.objectid, |
| 1619 | root); |
| 1620 | if (ret == 0) |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 1621 | set_bit(BTRFS_ROOT_IN_RADIX, &root->state); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1622 | spin_unlock(&fs_info->fs_roots_radix_lock); |
| 1623 | radix_tree_preload_end(); |
| 1624 | |
| 1625 | return ret; |
| 1626 | } |
| 1627 | |
Miao Xie | c00869f | 2013-09-25 21:47:44 +0800 | [diff] [blame] | 1628 | struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, |
| 1629 | struct btrfs_key *location, |
| 1630 | bool check_ref) |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1631 | { |
| 1632 | struct btrfs_root *root; |
| 1633 | int ret; |
| 1634 | |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1635 | if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) |
| 1636 | return fs_info->tree_root; |
| 1637 | if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) |
| 1638 | return fs_info->extent_root; |
Chris Mason | 8f18cf1 | 2008-04-25 16:53:30 -0400 | [diff] [blame] | 1639 | if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) |
| 1640 | return fs_info->chunk_root; |
| 1641 | if (location->objectid == BTRFS_DEV_TREE_OBJECTID) |
| 1642 | return fs_info->dev_root; |
Yan Zheng | 0403e47 | 2008-12-10 20:32:51 -0500 | [diff] [blame] | 1643 | if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) |
| 1644 | return fs_info->csum_root; |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 1645 | if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) |
| 1646 | return fs_info->quota_root ? fs_info->quota_root : |
| 1647 | ERR_PTR(-ENOENT); |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 1648 | if (location->objectid == BTRFS_UUID_TREE_OBJECTID) |
| 1649 | return fs_info->uuid_root ? fs_info->uuid_root : |
| 1650 | ERR_PTR(-ENOENT); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1651 | again: |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1652 | root = btrfs_lookup_fs_root(fs_info, location->objectid); |
Stefan Behrens | 4847547 | 2013-08-23 10:34:42 +0200 | [diff] [blame] | 1653 | if (root) { |
Miao Xie | c00869f | 2013-09-25 21:47:44 +0800 | [diff] [blame] | 1654 | if (check_ref && btrfs_root_refs(&root->root_item) == 0) |
Stefan Behrens | 4847547 | 2013-08-23 10:34:42 +0200 | [diff] [blame] | 1655 | return ERR_PTR(-ENOENT); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1656 | return root; |
Stefan Behrens | 4847547 | 2013-08-23 10:34:42 +0200 | [diff] [blame] | 1657 | } |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1658 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1659 | root = btrfs_read_fs_root(fs_info->tree_root, location); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1660 | if (IS_ERR(root)) |
| 1661 | return root; |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 1662 | |
Miao Xie | c00869f | 2013-09-25 21:47:44 +0800 | [diff] [blame] | 1663 | if (check_ref && btrfs_root_refs(&root->root_item) == 0) { |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1664 | ret = -ENOENT; |
| 1665 | goto fail; |
| 1666 | } |
| 1667 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1668 | ret = btrfs_init_fs_root(root); |
| 1669 | if (ret) |
| 1670 | goto fail; |
| 1671 | |
Kelley Nielsen | 3f870c2 | 2013-11-04 19:37:39 -0800 | [diff] [blame] | 1672 | ret = btrfs_find_item(fs_info->tree_root, NULL, BTRFS_ORPHAN_OBJECTID, |
| 1673 | location->objectid, BTRFS_ORPHAN_ITEM_KEY, NULL); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1674 | if (ret < 0) |
| 1675 | goto fail; |
| 1676 | if (ret == 0) |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 1677 | set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1678 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1679 | ret = btrfs_insert_fs_root(fs_info, root); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1680 | if (ret) { |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1681 | if (ret == -EEXIST) { |
| 1682 | free_fs_root(root); |
| 1683 | goto again; |
| 1684 | } |
| 1685 | goto fail; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1686 | } |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1687 | return root; |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1688 | fail: |
| 1689 | free_fs_root(root); |
| 1690 | return ERR_PTR(ret); |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1691 | } |
| 1692 | |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1693 | static int btrfs_congested_fn(void *congested_data, int bdi_bits) |
| 1694 | { |
| 1695 | struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; |
| 1696 | int ret = 0; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1697 | struct btrfs_device *device; |
| 1698 | struct backing_dev_info *bdi; |
Chris Mason | b7967db | 2009-04-27 07:29:04 -0400 | [diff] [blame] | 1699 | |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 1700 | rcu_read_lock(); |
| 1701 | list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1702 | if (!device->bdev) |
| 1703 | continue; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1704 | bdi = blk_get_backing_dev_info(device->bdev); |
Tejun Heo | ff9ea32 | 2014-09-08 08:03:56 +0900 | [diff] [blame] | 1705 | if (bdi_congested(bdi, bdi_bits)) { |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1706 | ret = 1; |
| 1707 | break; |
| 1708 | } |
| 1709 | } |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 1710 | rcu_read_unlock(); |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1711 | return ret; |
| 1712 | } |
| 1713 | |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1714 | static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) |
| 1715 | { |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 1716 | int err; |
| 1717 | |
| 1718 | bdi->capabilities = BDI_CAP_MAP_COPY; |
Jens Axboe | e6d086d | 2010-04-26 10:27:54 +0200 | [diff] [blame] | 1719 | err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY); |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 1720 | if (err) |
| 1721 | return err; |
| 1722 | |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 1723 | bdi->ra_pages = default_backing_dev_info.ra_pages; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1724 | bdi->congested_fn = btrfs_congested_fn; |
| 1725 | bdi->congested_data = info; |
| 1726 | return 0; |
| 1727 | } |
| 1728 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1729 | /* |
| 1730 | * called by the kthread helper functions to finally call the bio end_io |
| 1731 | * functions. This is where read checksum verification actually happens |
| 1732 | */ |
| 1733 | static void end_workqueue_fn(struct btrfs_work *work) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1734 | { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1735 | struct bio *bio; |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 1736 | struct btrfs_end_io_wq *end_io_wq; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1737 | int error; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1738 | |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 1739 | end_io_wq = container_of(work, struct btrfs_end_io_wq, work); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1740 | bio = end_io_wq->bio; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1741 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1742 | error = end_io_wq->error; |
| 1743 | bio->bi_private = end_io_wq->private; |
| 1744 | bio->bi_end_io = end_io_wq->end_io; |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 1745 | kmem_cache_free(btrfs_end_io_wq_cache, end_io_wq); |
Kent Overstreet | bc1e79a | 2013-12-03 13:24:08 -0800 | [diff] [blame] | 1746 | bio_endio_nodec(bio, error); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 1747 | } |
| 1748 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1749 | static int cleaner_kthread(void *arg) |
| 1750 | { |
| 1751 | struct btrfs_root *root = arg; |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1752 | int again; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1753 | |
| 1754 | do { |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1755 | again = 0; |
David Sterba | 9d1a2a3 | 2013-03-12 15:13:28 +0000 | [diff] [blame] | 1756 | |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1757 | /* Make the cleaner go to sleep early. */ |
Miao Xie | babbf170 | 2013-05-14 10:20:43 +0000 | [diff] [blame] | 1758 | if (btrfs_need_cleaner_sleep(root)) |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1759 | goto sleep; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1760 | |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1761 | if (!mutex_trylock(&root->fs_info->cleaner_mutex)) |
| 1762 | goto sleep; |
| 1763 | |
Miao Xie | dc7f370 | 2013-05-14 10:20:42 +0000 | [diff] [blame] | 1764 | /* |
| 1765 | * Avoid the problem that we change the status of the fs |
| 1766 | * during the above check and trylock. |
| 1767 | */ |
Miao Xie | babbf170 | 2013-05-14 10:20:43 +0000 | [diff] [blame] | 1768 | if (btrfs_need_cleaner_sleep(root)) { |
Miao Xie | dc7f370 | 2013-05-14 10:20:42 +0000 | [diff] [blame] | 1769 | mutex_unlock(&root->fs_info->cleaner_mutex); |
| 1770 | goto sleep; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1771 | } |
| 1772 | |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1773 | btrfs_run_delayed_iputs(root); |
Josef Bacik | 47ab2a6 | 2014-09-18 11:20:02 -0400 | [diff] [blame] | 1774 | btrfs_delete_unused_bgs(root->fs_info); |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1775 | again = btrfs_clean_one_deleted_snapshot(root); |
| 1776 | mutex_unlock(&root->fs_info->cleaner_mutex); |
| 1777 | |
| 1778 | /* |
Miao Xie | 05323cd | 2013-05-14 10:20:41 +0000 | [diff] [blame] | 1779 | * The defragger has dealt with the R/O remount and umount, |
| 1780 | * needn't do anything special here. |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1781 | */ |
| 1782 | btrfs_run_defrag_inodes(root->fs_info); |
| 1783 | sleep: |
David Sterba | 9d1a2a3 | 2013-03-12 15:13:28 +0000 | [diff] [blame] | 1784 | if (!try_to_freeze() && !again) { |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1785 | set_current_state(TASK_INTERRUPTIBLE); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1786 | if (!kthread_should_stop()) |
| 1787 | schedule(); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1788 | __set_current_state(TASK_RUNNING); |
| 1789 | } |
| 1790 | } while (!kthread_should_stop()); |
| 1791 | return 0; |
| 1792 | } |
| 1793 | |
| 1794 | static int transaction_kthread(void *arg) |
| 1795 | { |
| 1796 | struct btrfs_root *root = arg; |
| 1797 | struct btrfs_trans_handle *trans; |
| 1798 | struct btrfs_transaction *cur; |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1799 | u64 transid; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1800 | unsigned long now; |
| 1801 | unsigned long delay; |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1802 | bool cannot_commit; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1803 | |
| 1804 | do { |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1805 | cannot_commit = false; |
David Sterba | 8b87dc1 | 2013-08-01 18:14:52 +0200 | [diff] [blame] | 1806 | delay = HZ * root->fs_info->commit_interval; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1807 | mutex_lock(&root->fs_info->transaction_kthread_mutex); |
| 1808 | |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1809 | spin_lock(&root->fs_info->trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1810 | cur = root->fs_info->running_transaction; |
| 1811 | if (!cur) { |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1812 | spin_unlock(&root->fs_info->trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1813 | goto sleep; |
| 1814 | } |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1815 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1816 | now = get_seconds(); |
Miao Xie | 4a9d8bd | 2013-05-17 03:53:43 +0000 | [diff] [blame] | 1817 | if (cur->state < TRANS_STATE_BLOCKED && |
David Sterba | 8b87dc1 | 2013-08-01 18:14:52 +0200 | [diff] [blame] | 1818 | (now < cur->start_time || |
| 1819 | now - cur->start_time < root->fs_info->commit_interval)) { |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1820 | spin_unlock(&root->fs_info->trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1821 | delay = HZ * 5; |
| 1822 | goto sleep; |
| 1823 | } |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1824 | transid = cur->transid; |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1825 | spin_unlock(&root->fs_info->trans_lock); |
Chris Mason | 56bec29 | 2009-03-13 10:10:06 -0400 | [diff] [blame] | 1826 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 1827 | /* If the file system is aborted, this will always fail. */ |
Miao Xie | 354aa0f | 2012-09-20 01:54:00 -0600 | [diff] [blame] | 1828 | trans = btrfs_attach_transaction(root); |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1829 | if (IS_ERR(trans)) { |
Miao Xie | 354aa0f | 2012-09-20 01:54:00 -0600 | [diff] [blame] | 1830 | if (PTR_ERR(trans) != -ENOENT) |
| 1831 | cannot_commit = true; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 1832 | goto sleep; |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1833 | } |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1834 | if (transid == trans->transid) { |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 1835 | btrfs_commit_transaction(trans, root); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1836 | } else { |
| 1837 | btrfs_end_transaction(trans, root); |
| 1838 | } |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1839 | sleep: |
| 1840 | wake_up_process(root->fs_info->cleaner_kthread); |
| 1841 | mutex_unlock(&root->fs_info->transaction_kthread_mutex); |
| 1842 | |
Josef Bacik | 4e121c0 | 2013-09-27 16:32:39 -0400 | [diff] [blame] | 1843 | if (unlikely(test_bit(BTRFS_FS_STATE_ERROR, |
| 1844 | &root->fs_info->fs_state))) |
| 1845 | btrfs_cleanup_transaction(root); |
Tejun Heo | a0acae0 | 2011-11-21 12:32:22 -0800 | [diff] [blame] | 1846 | if (!try_to_freeze()) { |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1847 | set_current_state(TASK_INTERRUPTIBLE); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1848 | if (!kthread_should_stop() && |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1849 | (!btrfs_transaction_blocked(root->fs_info) || |
| 1850 | cannot_commit)) |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1851 | schedule_timeout(delay); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1852 | __set_current_state(TASK_RUNNING); |
| 1853 | } |
| 1854 | } while (!kthread_should_stop()); |
| 1855 | return 0; |
| 1856 | } |
| 1857 | |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1858 | /* |
| 1859 | * this will find the highest generation in the array of |
| 1860 | * root backups. The index of the highest array is returned, |
| 1861 | * or -1 if we can't find anything. |
| 1862 | * |
| 1863 | * We check to make sure the array is valid by comparing the |
| 1864 | * generation of the latest root in the array with the generation |
| 1865 | * in the super block. If they don't match we pitch it. |
| 1866 | */ |
| 1867 | static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) |
| 1868 | { |
| 1869 | u64 cur; |
| 1870 | int newest_index = -1; |
| 1871 | struct btrfs_root_backup *root_backup; |
| 1872 | int i; |
| 1873 | |
| 1874 | for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { |
| 1875 | root_backup = info->super_copy->super_roots + i; |
| 1876 | cur = btrfs_backup_tree_root_gen(root_backup); |
| 1877 | if (cur == newest_gen) |
| 1878 | newest_index = i; |
| 1879 | } |
| 1880 | |
| 1881 | /* check to see if we actually wrapped around */ |
| 1882 | if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { |
| 1883 | root_backup = info->super_copy->super_roots; |
| 1884 | cur = btrfs_backup_tree_root_gen(root_backup); |
| 1885 | if (cur == newest_gen) |
| 1886 | newest_index = 0; |
| 1887 | } |
| 1888 | return newest_index; |
| 1889 | } |
| 1890 | |
| 1891 | |
| 1892 | /* |
| 1893 | * find the oldest backup so we know where to store new entries |
| 1894 | * in the backup array. This will set the backup_root_index |
| 1895 | * field in the fs_info struct |
| 1896 | */ |
| 1897 | static void find_oldest_super_backup(struct btrfs_fs_info *info, |
| 1898 | u64 newest_gen) |
| 1899 | { |
| 1900 | int newest_index = -1; |
| 1901 | |
| 1902 | newest_index = find_newest_super_backup(info, newest_gen); |
| 1903 | /* if there was garbage in there, just move along */ |
| 1904 | if (newest_index == -1) { |
| 1905 | info->backup_root_index = 0; |
| 1906 | } else { |
| 1907 | info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; |
| 1908 | } |
| 1909 | } |
| 1910 | |
| 1911 | /* |
| 1912 | * copy all the root pointers into the super backup array. |
| 1913 | * this will bump the backup pointer by one when it is |
| 1914 | * done |
| 1915 | */ |
| 1916 | static void backup_super_roots(struct btrfs_fs_info *info) |
| 1917 | { |
| 1918 | int next_backup; |
| 1919 | struct btrfs_root_backup *root_backup; |
| 1920 | int last_backup; |
| 1921 | |
| 1922 | next_backup = info->backup_root_index; |
| 1923 | last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % |
| 1924 | BTRFS_NUM_BACKUP_ROOTS; |
| 1925 | |
| 1926 | /* |
| 1927 | * just overwrite the last backup if we're at the same generation |
| 1928 | * this happens only at umount |
| 1929 | */ |
| 1930 | root_backup = info->super_for_commit->super_roots + last_backup; |
| 1931 | if (btrfs_backup_tree_root_gen(root_backup) == |
| 1932 | btrfs_header_generation(info->tree_root->node)) |
| 1933 | next_backup = last_backup; |
| 1934 | |
| 1935 | root_backup = info->super_for_commit->super_roots + next_backup; |
| 1936 | |
| 1937 | /* |
| 1938 | * make sure all of our padding and empty slots get zero filled |
| 1939 | * regardless of which ones we use today |
| 1940 | */ |
| 1941 | memset(root_backup, 0, sizeof(*root_backup)); |
| 1942 | |
| 1943 | info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; |
| 1944 | |
| 1945 | btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); |
| 1946 | btrfs_set_backup_tree_root_gen(root_backup, |
| 1947 | btrfs_header_generation(info->tree_root->node)); |
| 1948 | |
| 1949 | btrfs_set_backup_tree_root_level(root_backup, |
| 1950 | btrfs_header_level(info->tree_root->node)); |
| 1951 | |
| 1952 | btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); |
| 1953 | btrfs_set_backup_chunk_root_gen(root_backup, |
| 1954 | btrfs_header_generation(info->chunk_root->node)); |
| 1955 | btrfs_set_backup_chunk_root_level(root_backup, |
| 1956 | btrfs_header_level(info->chunk_root->node)); |
| 1957 | |
| 1958 | btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); |
| 1959 | btrfs_set_backup_extent_root_gen(root_backup, |
| 1960 | btrfs_header_generation(info->extent_root->node)); |
| 1961 | btrfs_set_backup_extent_root_level(root_backup, |
| 1962 | btrfs_header_level(info->extent_root->node)); |
| 1963 | |
Chris Mason | 7c7e82a | 2011-11-06 18:50:56 -0500 | [diff] [blame] | 1964 | /* |
| 1965 | * we might commit during log recovery, which happens before we set |
| 1966 | * the fs_root. Make sure it is valid before we fill it in. |
| 1967 | */ |
| 1968 | if (info->fs_root && info->fs_root->node) { |
| 1969 | btrfs_set_backup_fs_root(root_backup, |
| 1970 | info->fs_root->node->start); |
| 1971 | btrfs_set_backup_fs_root_gen(root_backup, |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1972 | btrfs_header_generation(info->fs_root->node)); |
Chris Mason | 7c7e82a | 2011-11-06 18:50:56 -0500 | [diff] [blame] | 1973 | btrfs_set_backup_fs_root_level(root_backup, |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1974 | btrfs_header_level(info->fs_root->node)); |
Chris Mason | 7c7e82a | 2011-11-06 18:50:56 -0500 | [diff] [blame] | 1975 | } |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1976 | |
| 1977 | btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); |
| 1978 | btrfs_set_backup_dev_root_gen(root_backup, |
| 1979 | btrfs_header_generation(info->dev_root->node)); |
| 1980 | btrfs_set_backup_dev_root_level(root_backup, |
| 1981 | btrfs_header_level(info->dev_root->node)); |
| 1982 | |
| 1983 | btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); |
| 1984 | btrfs_set_backup_csum_root_gen(root_backup, |
| 1985 | btrfs_header_generation(info->csum_root->node)); |
| 1986 | btrfs_set_backup_csum_root_level(root_backup, |
| 1987 | btrfs_header_level(info->csum_root->node)); |
| 1988 | |
| 1989 | btrfs_set_backup_total_bytes(root_backup, |
| 1990 | btrfs_super_total_bytes(info->super_copy)); |
| 1991 | btrfs_set_backup_bytes_used(root_backup, |
| 1992 | btrfs_super_bytes_used(info->super_copy)); |
| 1993 | btrfs_set_backup_num_devices(root_backup, |
| 1994 | btrfs_super_num_devices(info->super_copy)); |
| 1995 | |
| 1996 | /* |
| 1997 | * if we don't copy this out to the super_copy, it won't get remembered |
| 1998 | * for the next commit |
| 1999 | */ |
| 2000 | memcpy(&info->super_copy->super_roots, |
| 2001 | &info->super_for_commit->super_roots, |
| 2002 | sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); |
| 2003 | } |
| 2004 | |
| 2005 | /* |
| 2006 | * this copies info out of the root backup array and back into |
| 2007 | * the in-memory super block. It is meant to help iterate through |
| 2008 | * the array, so you send it the number of backups you've already |
| 2009 | * tried and the last backup index you used. |
| 2010 | * |
| 2011 | * this returns -1 when it has tried all the backups |
| 2012 | */ |
| 2013 | static noinline int next_root_backup(struct btrfs_fs_info *info, |
| 2014 | struct btrfs_super_block *super, |
| 2015 | int *num_backups_tried, int *backup_index) |
| 2016 | { |
| 2017 | struct btrfs_root_backup *root_backup; |
| 2018 | int newest = *backup_index; |
| 2019 | |
| 2020 | if (*num_backups_tried == 0) { |
| 2021 | u64 gen = btrfs_super_generation(super); |
| 2022 | |
| 2023 | newest = find_newest_super_backup(info, gen); |
| 2024 | if (newest == -1) |
| 2025 | return -1; |
| 2026 | |
| 2027 | *backup_index = newest; |
| 2028 | *num_backups_tried = 1; |
| 2029 | } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { |
| 2030 | /* we've tried all the backups, all done */ |
| 2031 | return -1; |
| 2032 | } else { |
| 2033 | /* jump to the next oldest backup */ |
| 2034 | newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % |
| 2035 | BTRFS_NUM_BACKUP_ROOTS; |
| 2036 | *backup_index = newest; |
| 2037 | *num_backups_tried += 1; |
| 2038 | } |
| 2039 | root_backup = super->super_roots + newest; |
| 2040 | |
| 2041 | btrfs_set_super_generation(super, |
| 2042 | btrfs_backup_tree_root_gen(root_backup)); |
| 2043 | btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); |
| 2044 | btrfs_set_super_root_level(super, |
| 2045 | btrfs_backup_tree_root_level(root_backup)); |
| 2046 | btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); |
| 2047 | |
| 2048 | /* |
| 2049 | * fixme: the total bytes and num_devices need to match or we should |
| 2050 | * need a fsck |
| 2051 | */ |
| 2052 | btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); |
| 2053 | btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); |
| 2054 | return 0; |
| 2055 | } |
| 2056 | |
Liu Bo | 7abadb6 | 2013-03-17 02:10:31 +0000 | [diff] [blame] | 2057 | /* helper to cleanup workers */ |
| 2058 | static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) |
| 2059 | { |
Qu Wenruo | dc6e320 | 2014-02-28 10:46:14 +0800 | [diff] [blame] | 2060 | btrfs_destroy_workqueue(fs_info->fixup_workers); |
Qu Wenruo | afe3d24 | 2014-02-28 10:46:07 +0800 | [diff] [blame] | 2061 | btrfs_destroy_workqueue(fs_info->delalloc_workers); |
Qu Wenruo | 5cdc7ad3 | 2014-02-28 10:46:06 +0800 | [diff] [blame] | 2062 | btrfs_destroy_workqueue(fs_info->workers); |
Qu Wenruo | fccb5d8 | 2014-02-28 10:46:10 +0800 | [diff] [blame] | 2063 | btrfs_destroy_workqueue(fs_info->endio_workers); |
| 2064 | btrfs_destroy_workqueue(fs_info->endio_meta_workers); |
| 2065 | btrfs_destroy_workqueue(fs_info->endio_raid56_workers); |
Miao Xie | 8b110e3 | 2014-09-12 18:44:03 +0800 | [diff] [blame] | 2066 | btrfs_destroy_workqueue(fs_info->endio_repair_workers); |
Qu Wenruo | d05a33a | 2014-02-28 10:46:11 +0800 | [diff] [blame] | 2067 | btrfs_destroy_workqueue(fs_info->rmw_workers); |
Qu Wenruo | fccb5d8 | 2014-02-28 10:46:10 +0800 | [diff] [blame] | 2068 | btrfs_destroy_workqueue(fs_info->endio_meta_write_workers); |
| 2069 | btrfs_destroy_workqueue(fs_info->endio_write_workers); |
| 2070 | btrfs_destroy_workqueue(fs_info->endio_freespace_worker); |
Qu Wenruo | a8c93d4 | 2014-02-28 10:46:08 +0800 | [diff] [blame] | 2071 | btrfs_destroy_workqueue(fs_info->submit_workers); |
Qu Wenruo | 5b3bc44 | 2014-02-28 10:46:15 +0800 | [diff] [blame] | 2072 | btrfs_destroy_workqueue(fs_info->delayed_workers); |
Qu Wenruo | e66f0bb | 2014-02-28 10:46:12 +0800 | [diff] [blame] | 2073 | btrfs_destroy_workqueue(fs_info->caching_workers); |
Qu Wenruo | 736cfa1 | 2014-02-28 10:46:13 +0800 | [diff] [blame] | 2074 | btrfs_destroy_workqueue(fs_info->readahead_workers); |
Qu Wenruo | a44903a | 2014-02-28 10:46:09 +0800 | [diff] [blame] | 2075 | btrfs_destroy_workqueue(fs_info->flush_workers); |
Qu Wenruo | fc97fab | 2014-02-28 10:46:16 +0800 | [diff] [blame] | 2076 | btrfs_destroy_workqueue(fs_info->qgroup_rescan_workers); |
Chris Mason | a79b7d4 | 2014-05-22 16:18:52 -0700 | [diff] [blame] | 2077 | btrfs_destroy_workqueue(fs_info->extent_workers); |
Liu Bo | 7abadb6 | 2013-03-17 02:10:31 +0000 | [diff] [blame] | 2078 | } |
| 2079 | |
Rashika | 2e9f595 | 2013-10-31 02:45:20 +0530 | [diff] [blame] | 2080 | static void free_root_extent_buffers(struct btrfs_root *root) |
| 2081 | { |
| 2082 | if (root) { |
| 2083 | free_extent_buffer(root->node); |
| 2084 | free_extent_buffer(root->commit_root); |
| 2085 | root->node = NULL; |
| 2086 | root->commit_root = NULL; |
| 2087 | } |
| 2088 | } |
| 2089 | |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2090 | /* helper to cleanup tree roots */ |
| 2091 | static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) |
| 2092 | { |
Rashika | 2e9f595 | 2013-10-31 02:45:20 +0530 | [diff] [blame] | 2093 | free_root_extent_buffers(info->tree_root); |
Josef Bacik | 655b09f | 2013-05-17 14:06:51 -0400 | [diff] [blame] | 2094 | |
Rashika | 2e9f595 | 2013-10-31 02:45:20 +0530 | [diff] [blame] | 2095 | free_root_extent_buffers(info->dev_root); |
| 2096 | free_root_extent_buffers(info->extent_root); |
| 2097 | free_root_extent_buffers(info->csum_root); |
| 2098 | free_root_extent_buffers(info->quota_root); |
| 2099 | free_root_extent_buffers(info->uuid_root); |
| 2100 | if (chunk_root) |
| 2101 | free_root_extent_buffers(info->chunk_root); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2102 | } |
| 2103 | |
Josef Bacik | faa2dbf | 2014-05-07 17:06:09 -0400 | [diff] [blame] | 2104 | void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info) |
Josef Bacik | 171f653 | 2013-04-24 16:35:41 -0400 | [diff] [blame] | 2105 | { |
| 2106 | int ret; |
| 2107 | struct btrfs_root *gang[8]; |
| 2108 | int i; |
| 2109 | |
| 2110 | while (!list_empty(&fs_info->dead_roots)) { |
| 2111 | gang[0] = list_entry(fs_info->dead_roots.next, |
| 2112 | struct btrfs_root, root_list); |
| 2113 | list_del(&gang[0]->root_list); |
| 2114 | |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 2115 | if (test_bit(BTRFS_ROOT_IN_RADIX, &gang[0]->state)) { |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2116 | btrfs_drop_and_free_fs_root(fs_info, gang[0]); |
Josef Bacik | 171f653 | 2013-04-24 16:35:41 -0400 | [diff] [blame] | 2117 | } else { |
| 2118 | free_extent_buffer(gang[0]->node); |
| 2119 | free_extent_buffer(gang[0]->commit_root); |
Miao Xie | b0feb9d | 2013-05-15 07:48:20 +0000 | [diff] [blame] | 2120 | btrfs_put_fs_root(gang[0]); |
Josef Bacik | 171f653 | 2013-04-24 16:35:41 -0400 | [diff] [blame] | 2121 | } |
| 2122 | } |
| 2123 | |
| 2124 | while (1) { |
| 2125 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
| 2126 | (void **)gang, 0, |
| 2127 | ARRAY_SIZE(gang)); |
| 2128 | if (!ret) |
| 2129 | break; |
| 2130 | for (i = 0; i < ret; i++) |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2131 | btrfs_drop_and_free_fs_root(fs_info, gang[i]); |
Josef Bacik | 171f653 | 2013-04-24 16:35:41 -0400 | [diff] [blame] | 2132 | } |
Liu Bo | 1a4319c | 2014-01-13 19:53:53 +0800 | [diff] [blame] | 2133 | |
| 2134 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { |
| 2135 | btrfs_free_log_root_tree(NULL, fs_info); |
| 2136 | btrfs_destroy_pinned_extent(fs_info->tree_root, |
| 2137 | fs_info->pinned_extents); |
| 2138 | } |
Josef Bacik | 171f653 | 2013-04-24 16:35:41 -0400 | [diff] [blame] | 2139 | } |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2140 | |
Al Viro | ad2b2c8 | 2011-11-17 01:10:02 -0500 | [diff] [blame] | 2141 | int open_ctree(struct super_block *sb, |
| 2142 | struct btrfs_fs_devices *fs_devices, |
| 2143 | char *options) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 2144 | { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2145 | u32 sectorsize; |
| 2146 | u32 nodesize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 2147 | u32 stripesize; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2148 | u64 generation; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2149 | u64 features; |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 2150 | struct btrfs_key location; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2151 | struct buffer_head *bh; |
Ilya Dryomov | 4d34b27 | 2011-11-09 00:08:15 +0200 | [diff] [blame] | 2152 | struct btrfs_super_block *disk_super; |
Al Viro | 815745c | 2011-11-17 15:40:49 -0500 | [diff] [blame] | 2153 | struct btrfs_fs_info *fs_info = btrfs_sb(sb); |
Al Viro | f84a8bd | 2011-11-17 15:57:57 -0500 | [diff] [blame] | 2154 | struct btrfs_root *tree_root; |
Ilya Dryomov | 4d34b27 | 2011-11-09 00:08:15 +0200 | [diff] [blame] | 2155 | struct btrfs_root *extent_root; |
| 2156 | struct btrfs_root *csum_root; |
| 2157 | struct btrfs_root *chunk_root; |
| 2158 | struct btrfs_root *dev_root; |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2159 | struct btrfs_root *quota_root; |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 2160 | struct btrfs_root *uuid_root; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2161 | struct btrfs_root *log_tree_root; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 2162 | int ret; |
Yan | e58ca02 | 2008-04-01 11:21:34 -0400 | [diff] [blame] | 2163 | int err = -EINVAL; |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2164 | int num_backups_tried = 0; |
| 2165 | int backup_index = 0; |
Qu Wenruo | 5cdc7ad3 | 2014-02-28 10:46:06 +0800 | [diff] [blame] | 2166 | int max_active; |
| 2167 | int flags = WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND; |
Stefan Behrens | 70f8017 | 2013-08-15 17:11:23 +0200 | [diff] [blame] | 2168 | bool create_uuid_tree; |
| 2169 | bool check_uuid_tree; |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 2170 | |
Al Viro | f84a8bd | 2011-11-17 15:57:57 -0500 | [diff] [blame] | 2171 | tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info); |
Al Viro | 6f07e42 | 2011-11-17 00:46:16 -0500 | [diff] [blame] | 2172 | chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2173 | if (!tree_root || !chunk_root) { |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2174 | err = -ENOMEM; |
| 2175 | goto fail; |
| 2176 | } |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2177 | |
| 2178 | ret = init_srcu_struct(&fs_info->subvol_srcu); |
| 2179 | if (ret) { |
| 2180 | err = ret; |
| 2181 | goto fail; |
| 2182 | } |
| 2183 | |
| 2184 | ret = setup_bdi(fs_info, &fs_info->bdi); |
| 2185 | if (ret) { |
| 2186 | err = ret; |
| 2187 | goto fail_srcu; |
| 2188 | } |
| 2189 | |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 2190 | ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL); |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 2191 | if (ret) { |
| 2192 | err = ret; |
| 2193 | goto fail_bdi; |
| 2194 | } |
| 2195 | fs_info->dirty_metadata_batch = PAGE_CACHE_SIZE * |
| 2196 | (1 + ilog2(nr_cpu_ids)); |
| 2197 | |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 2198 | ret = percpu_counter_init(&fs_info->delalloc_bytes, 0, GFP_KERNEL); |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 2199 | if (ret) { |
| 2200 | err = ret; |
| 2201 | goto fail_dirty_metadata_bytes; |
| 2202 | } |
| 2203 | |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 2204 | ret = percpu_counter_init(&fs_info->bio_counter, 0, GFP_KERNEL); |
Miao Xie | c404e0d | 2014-01-30 16:46:55 +0800 | [diff] [blame] | 2205 | if (ret) { |
| 2206 | err = ret; |
| 2207 | goto fail_delalloc_bytes; |
| 2208 | } |
| 2209 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2210 | fs_info->btree_inode = new_inode(sb); |
| 2211 | if (!fs_info->btree_inode) { |
| 2212 | err = -ENOMEM; |
Miao Xie | c404e0d | 2014-01-30 16:46:55 +0800 | [diff] [blame] | 2213 | goto fail_bio_counter; |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2214 | } |
| 2215 | |
Chris Mason | a659171 | 2011-07-19 12:04:14 -0400 | [diff] [blame] | 2216 | mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); |
Miao Xie | 1561ded | 2011-03-27 16:07:36 +0800 | [diff] [blame] | 2217 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2218 | INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); |
Josef Bacik | f28491e | 2013-12-16 13:24:27 -0500 | [diff] [blame] | 2219 | INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC); |
Chris Mason | 8fd1779 | 2007-04-19 21:01:03 -0400 | [diff] [blame] | 2220 | INIT_LIST_HEAD(&fs_info->trans_list); |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 2221 | INIT_LIST_HEAD(&fs_info->dead_roots); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 2222 | INIT_LIST_HEAD(&fs_info->delayed_iputs); |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 2223 | INIT_LIST_HEAD(&fs_info->delalloc_roots); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2224 | INIT_LIST_HEAD(&fs_info->caching_block_groups); |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 2225 | spin_lock_init(&fs_info->delalloc_root_lock); |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 2226 | spin_lock_init(&fs_info->trans_lock); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2227 | spin_lock_init(&fs_info->fs_roots_radix_lock); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 2228 | spin_lock_init(&fs_info->delayed_iput_lock); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 2229 | spin_lock_init(&fs_info->defrag_inodes_lock); |
Josef Bacik | 2bf6475 | 2011-09-26 17:12:22 -0400 | [diff] [blame] | 2230 | spin_lock_init(&fs_info->free_chunk_lock); |
Jan Schmidt | f29021b | 2012-05-16 17:55:38 +0200 | [diff] [blame] | 2231 | spin_lock_init(&fs_info->tree_mod_seq_lock); |
Miao Xie | ceda086 | 2013-04-11 10:30:16 +0000 | [diff] [blame] | 2232 | spin_lock_init(&fs_info->super_lock); |
Josef Bacik | fcebe45 | 2014-05-13 17:30:47 -0700 | [diff] [blame] | 2233 | spin_lock_init(&fs_info->qgroup_op_lock); |
Josef Bacik | f28491e | 2013-12-16 13:24:27 -0500 | [diff] [blame] | 2234 | spin_lock_init(&fs_info->buffer_lock); |
Josef Bacik | 47ab2a6 | 2014-09-18 11:20:02 -0400 | [diff] [blame] | 2235 | spin_lock_init(&fs_info->unused_bgs_lock); |
Jan Schmidt | f29021b | 2012-05-16 17:55:38 +0200 | [diff] [blame] | 2236 | rwlock_init(&fs_info->tree_mod_log_lock); |
Chris Mason | 7585717 | 2011-06-13 20:00:16 -0400 | [diff] [blame] | 2237 | mutex_init(&fs_info->reloc_mutex); |
Miao Xie | 573bfb7 | 2014-03-06 13:55:03 +0800 | [diff] [blame] | 2238 | mutex_init(&fs_info->delalloc_root_mutex); |
Miao Xie | de98ced | 2013-01-29 10:13:12 +0000 | [diff] [blame] | 2239 | seqlock_init(&fs_info->profiles_lock); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 2240 | |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 2241 | init_completion(&fs_info->kobj_unregister); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2242 | INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 2243 | INIT_LIST_HEAD(&fs_info->space_info); |
Jan Schmidt | f29021b | 2012-05-16 17:55:38 +0200 | [diff] [blame] | 2244 | INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); |
Josef Bacik | 47ab2a6 | 2014-09-18 11:20:02 -0400 | [diff] [blame] | 2245 | INIT_LIST_HEAD(&fs_info->unused_bgs); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2246 | btrfs_mapping_init(&fs_info->mapping_tree); |
Miao Xie | 66d8f3d | 2012-09-06 04:02:28 -0600 | [diff] [blame] | 2247 | btrfs_init_block_rsv(&fs_info->global_block_rsv, |
| 2248 | BTRFS_BLOCK_RSV_GLOBAL); |
| 2249 | btrfs_init_block_rsv(&fs_info->delalloc_block_rsv, |
| 2250 | BTRFS_BLOCK_RSV_DELALLOC); |
| 2251 | btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); |
| 2252 | btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); |
| 2253 | btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); |
| 2254 | btrfs_init_block_rsv(&fs_info->delayed_block_rsv, |
| 2255 | BTRFS_BLOCK_RSV_DELOPS); |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 2256 | atomic_set(&fs_info->nr_async_submits, 0); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2257 | atomic_set(&fs_info->async_delalloc_pages, 0); |
Chris Mason | 8c8bee1 | 2008-09-29 11:19:10 -0400 | [diff] [blame] | 2258 | atomic_set(&fs_info->async_submit_draining, 0); |
Chris Mason | 0986fe9e | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 2259 | atomic_set(&fs_info->nr_async_bios, 0); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 2260 | atomic_set(&fs_info->defrag_running, 0); |
Josef Bacik | fcebe45 | 2014-05-13 17:30:47 -0700 | [diff] [blame] | 2261 | atomic_set(&fs_info->qgroup_op_seq, 0); |
Jan Schmidt | fc36ed7e | 2013-04-24 16:57:33 +0000 | [diff] [blame] | 2262 | atomic64_set(&fs_info->tree_mod_seq, 0); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 2263 | fs_info->sb = sb; |
Filipe David Borba Manana | 95ac567 | 2013-08-08 22:45:48 +0100 | [diff] [blame] | 2264 | fs_info->max_inline = BTRFS_DEFAULT_MAX_INLINE; |
Josef Bacik | 9ed74f2 | 2009-09-11 16:12:44 -0400 | [diff] [blame] | 2265 | fs_info->metadata_ratio = 0; |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 2266 | fs_info->defrag_inodes = RB_ROOT; |
Josef Bacik | 2bf6475 | 2011-09-26 17:12:22 -0400 | [diff] [blame] | 2267 | fs_info->free_chunk_space = 0; |
Jan Schmidt | f29021b | 2012-05-16 17:55:38 +0200 | [diff] [blame] | 2268 | fs_info->tree_mod_log = RB_ROOT; |
David Sterba | 8b87dc1 | 2013-08-01 18:14:52 +0200 | [diff] [blame] | 2269 | fs_info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL; |
Josef Bacik | 0a2b2a8 | 2014-01-23 10:54:11 -0500 | [diff] [blame] | 2270 | fs_info->avg_delayed_ref_runtime = div64_u64(NSEC_PER_SEC, 64); |
Arne Jansen | 90519d6 | 2011-05-23 14:30:00 +0200 | [diff] [blame] | 2271 | /* readahead state */ |
| 2272 | INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT); |
| 2273 | spin_lock_init(&fs_info->reada_lock); |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 2274 | |
Chris Mason | b34b086 | 2008-12-19 15:43:22 -0500 | [diff] [blame] | 2275 | fs_info->thread_pool_size = min_t(unsigned long, |
| 2276 | num_online_cpus() + 2, 8); |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 2277 | |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 2278 | INIT_LIST_HEAD(&fs_info->ordered_roots); |
| 2279 | spin_lock_init(&fs_info->ordered_root_lock); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2280 | fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), |
| 2281 | GFP_NOFS); |
| 2282 | if (!fs_info->delayed_root) { |
| 2283 | err = -ENOMEM; |
| 2284 | goto fail_iput; |
| 2285 | } |
| 2286 | btrfs_init_delayed_root(fs_info->delayed_root); |
Chris Mason | 3eaa288 | 2008-07-24 11:57:52 -0400 | [diff] [blame] | 2287 | |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 2288 | mutex_init(&fs_info->scrub_lock); |
| 2289 | atomic_set(&fs_info->scrubs_running, 0); |
| 2290 | atomic_set(&fs_info->scrub_pause_req, 0); |
| 2291 | atomic_set(&fs_info->scrubs_paused, 0); |
| 2292 | atomic_set(&fs_info->scrub_cancel_req, 0); |
Miao Xie | c404e0d | 2014-01-30 16:46:55 +0800 | [diff] [blame] | 2293 | init_waitqueue_head(&fs_info->replace_wait); |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 2294 | init_waitqueue_head(&fs_info->scrub_pause_wait); |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 2295 | fs_info->scrub_workers_refcnt = 0; |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 2296 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
| 2297 | fs_info->check_integrity_print_mask = 0; |
| 2298 | #endif |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 2299 | |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 2300 | spin_lock_init(&fs_info->balance_lock); |
| 2301 | mutex_init(&fs_info->balance_mutex); |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 2302 | atomic_set(&fs_info->balance_running, 0); |
| 2303 | atomic_set(&fs_info->balance_pause_req, 0); |
Ilya Dryomov | a7e99c6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 2304 | atomic_set(&fs_info->balance_cancel_req, 0); |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 2305 | fs_info->balance_ctl = NULL; |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 2306 | init_waitqueue_head(&fs_info->balance_wait_q); |
Miao Xie | 21c7e75 | 2014-05-13 17:29:04 -0700 | [diff] [blame] | 2307 | btrfs_init_async_reclaim_work(&fs_info->async_reclaim_work); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2308 | |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 2309 | sb->s_blocksize = 4096; |
| 2310 | sb->s_blocksize_bits = blksize_bits(4096); |
Jens Axboe | 32a88aa | 2009-09-16 15:02:33 +0200 | [diff] [blame] | 2311 | sb->s_bdi = &fs_info->bdi; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 2312 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2313 | fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 2314 | set_nlink(fs_info->btree_inode, 1); |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 2315 | /* |
| 2316 | * we set the i_size on the btree inode to the max possible int. |
| 2317 | * the real end of the address space is determined by all of |
| 2318 | * the devices in the system |
| 2319 | */ |
| 2320 | fs_info->btree_inode->i_size = OFFSET_MAX; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 2321 | fs_info->btree_inode->i_mapping->a_ops = &btree_aops; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 2322 | fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; |
| 2323 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2324 | RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 2325 | extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, |
David Sterba | f993c88 | 2011-04-20 23:35:57 +0200 | [diff] [blame] | 2326 | fs_info->btree_inode->i_mapping); |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 2327 | BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; |
David Sterba | a8067e0 | 2011-04-21 00:34:43 +0200 | [diff] [blame] | 2328 | extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 2329 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 2330 | BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; |
| 2331 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2332 | BTRFS_I(fs_info->btree_inode)->root = tree_root; |
| 2333 | memset(&BTRFS_I(fs_info->btree_inode)->location, 0, |
| 2334 | sizeof(struct btrfs_key)); |
Josef Bacik | 72ac3c0 | 2012-05-23 14:13:11 -0400 | [diff] [blame] | 2335 | set_bit(BTRFS_INODE_DUMMY, |
| 2336 | &BTRFS_I(fs_info->btree_inode)->runtime_flags); |
Filipe David Borba Manana | 778ba82 | 2013-10-06 22:22:33 +0100 | [diff] [blame] | 2337 | btrfs_insert_inode_hash(fs_info->btree_inode); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2338 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2339 | spin_lock_init(&fs_info->block_group_cache_lock); |
Eric Paris | 6bef4d3 | 2010-02-23 19:43:04 +0000 | [diff] [blame] | 2340 | fs_info->block_group_cache_tree = RB_ROOT; |
Liu Bo | a1897fd | 2012-12-27 09:01:23 +0000 | [diff] [blame] | 2341 | fs_info->first_logical_byte = (u64)-1; |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2342 | |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2343 | extent_io_tree_init(&fs_info->freed_extents[0], |
David Sterba | f993c88 | 2011-04-20 23:35:57 +0200 | [diff] [blame] | 2344 | fs_info->btree_inode->i_mapping); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2345 | extent_io_tree_init(&fs_info->freed_extents[1], |
David Sterba | f993c88 | 2011-04-20 23:35:57 +0200 | [diff] [blame] | 2346 | fs_info->btree_inode->i_mapping); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2347 | fs_info->pinned_extents = &fs_info->freed_extents[0]; |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 2348 | fs_info->do_barriers = 1; |
Chris Mason | f929574 | 2008-07-17 12:54:14 -0400 | [diff] [blame] | 2349 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 2350 | |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 2351 | mutex_init(&fs_info->ordered_operations_mutex); |
Josef Bacik | 9ffba8c | 2013-08-14 11:33:56 -0400 | [diff] [blame] | 2352 | mutex_init(&fs_info->ordered_extent_flush_mutex); |
Chris Mason | 30ae846 | 2007-03-29 09:59:15 -0400 | [diff] [blame] | 2353 | mutex_init(&fs_info->tree_log_mutex); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2354 | mutex_init(&fs_info->chunk_mutex); |
| 2355 | mutex_init(&fs_info->transaction_kthread_mutex); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2356 | mutex_init(&fs_info->cleaner_mutex); |
| 2357 | mutex_init(&fs_info->volume_mutex); |
Josef Bacik | 9e351cc | 2014-03-13 15:42:13 -0400 | [diff] [blame] | 2358 | init_rwsem(&fs_info->commit_root_sem); |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 2359 | init_rwsem(&fs_info->cleanup_work_sem); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2360 | init_rwsem(&fs_info->subvol_sem); |
Stefan Behrens | 803b2f5 | 2013-08-15 17:11:21 +0200 | [diff] [blame] | 2361 | sema_init(&fs_info->uuid_tree_rescan_sem, 1); |
Stefan Behrens | e922e08 | 2012-11-05 17:26:40 +0100 | [diff] [blame] | 2362 | fs_info->dev_replace.lock_owner = 0; |
| 2363 | atomic_set(&fs_info->dev_replace.nesting_level, 0); |
| 2364 | mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); |
| 2365 | mutex_init(&fs_info->dev_replace.lock_management_lock); |
| 2366 | mutex_init(&fs_info->dev_replace.lock); |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 2367 | |
Arne Jansen | 416ac51 | 2011-09-13 12:56:09 +0200 | [diff] [blame] | 2368 | spin_lock_init(&fs_info->qgroup_lock); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 2369 | mutex_init(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | 416ac51 | 2011-09-13 12:56:09 +0200 | [diff] [blame] | 2370 | fs_info->qgroup_tree = RB_ROOT; |
Josef Bacik | fcebe45 | 2014-05-13 17:30:47 -0700 | [diff] [blame] | 2371 | fs_info->qgroup_op_tree = RB_ROOT; |
Arne Jansen | 416ac51 | 2011-09-13 12:56:09 +0200 | [diff] [blame] | 2372 | INIT_LIST_HEAD(&fs_info->dirty_qgroups); |
| 2373 | fs_info->qgroup_seq = 1; |
| 2374 | fs_info->quota_enabled = 0; |
| 2375 | fs_info->pending_quota_state = 0; |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 2376 | fs_info->qgroup_ulist = NULL; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2377 | mutex_init(&fs_info->qgroup_rescan_lock); |
Arne Jansen | 416ac51 | 2011-09-13 12:56:09 +0200 | [diff] [blame] | 2378 | |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 2379 | btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); |
| 2380 | btrfs_init_free_cluster(&fs_info->data_alloc_cluster); |
| 2381 | |
Chris Mason | 7d9eb12 | 2008-07-08 14:19:17 -0400 | [diff] [blame] | 2382 | init_waitqueue_head(&fs_info->transaction_throttle); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 2383 | init_waitqueue_head(&fs_info->transaction_wait); |
Sage Weil | bb9c12c | 2010-10-29 15:37:34 -0400 | [diff] [blame] | 2384 | init_waitqueue_head(&fs_info->transaction_blocked_wait); |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 2385 | init_waitqueue_head(&fs_info->async_submit_wait); |
Chris Mason | 9a8dd15 | 2007-02-23 08:38:36 -0500 | [diff] [blame] | 2386 | |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 2387 | ret = btrfs_alloc_stripe_hash_table(fs_info); |
| 2388 | if (ret) { |
David Sterba | 83c8266 | 2013-03-01 15:03:00 +0000 | [diff] [blame] | 2389 | err = ret; |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 2390 | goto fail_alloc; |
| 2391 | } |
| 2392 | |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 2393 | __setup_root(4096, 4096, 4096, tree_root, |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 2394 | fs_info, BTRFS_ROOT_TREE_OBJECTID); |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 2395 | |
Chris Mason | 3c4bb26 | 2012-03-27 18:56:56 -0400 | [diff] [blame] | 2396 | invalidate_bdev(fs_devices->latest_bdev); |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 2397 | |
| 2398 | /* |
| 2399 | * Read super block and check the signature bytes only |
| 2400 | */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2401 | bh = btrfs_read_dev_super(fs_devices->latest_bdev); |
Dave Young | 20b4507 | 2011-01-08 10:09:13 +0000 | [diff] [blame] | 2402 | if (!bh) { |
| 2403 | err = -EINVAL; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2404 | goto fail_alloc; |
Dave Young | 20b4507 | 2011-01-08 10:09:13 +0000 | [diff] [blame] | 2405 | } |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2406 | |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 2407 | /* |
| 2408 | * We want to check superblock checksum, the type is stored inside. |
| 2409 | * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k). |
| 2410 | */ |
| 2411 | if (btrfs_check_super_csum(bh->b_data)) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2412 | printk(KERN_ERR "BTRFS: superblock checksum mismatch\n"); |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 2413 | err = -EINVAL; |
| 2414 | goto fail_alloc; |
| 2415 | } |
| 2416 | |
| 2417 | /* |
| 2418 | * super_copy is zeroed at allocation time and we never touch the |
| 2419 | * following bytes up to INFO_SIZE, the checksum is calculated from |
| 2420 | * the whole block of INFO_SIZE |
| 2421 | */ |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2422 | memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); |
| 2423 | memcpy(fs_info->super_for_commit, fs_info->super_copy, |
| 2424 | sizeof(*fs_info->super_for_commit)); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2425 | brelse(bh); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2426 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2427 | memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2428 | |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 2429 | ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); |
| 2430 | if (ret) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2431 | printk(KERN_ERR "BTRFS: superblock contains fatal errors\n"); |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 2432 | err = -EINVAL; |
| 2433 | goto fail_alloc; |
| 2434 | } |
| 2435 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2436 | disk_super = fs_info->super_copy; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2437 | if (!btrfs_super_root(disk_super)) |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2438 | goto fail_alloc; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2439 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2440 | /* check FS state, whether FS is broken. */ |
Miao Xie | 87533c4 | 2013-01-29 10:14:48 +0000 | [diff] [blame] | 2441 | if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) |
| 2442 | set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2443 | |
Liu Bo | 75e7cb7 | 2011-03-22 10:12:20 +0000 | [diff] [blame] | 2444 | /* |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2445 | * run through our array of backup supers and setup |
| 2446 | * our ring pointer to the oldest one |
| 2447 | */ |
| 2448 | generation = btrfs_super_generation(disk_super); |
| 2449 | find_oldest_super_backup(fs_info, generation); |
| 2450 | |
| 2451 | /* |
Liu Bo | 75e7cb7 | 2011-03-22 10:12:20 +0000 | [diff] [blame] | 2452 | * In the long term, we'll store the compression type in the super |
| 2453 | * block, and it'll be used for per file compression control. |
| 2454 | */ |
| 2455 | fs_info->compress_type = BTRFS_COMPRESS_ZLIB; |
| 2456 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2457 | ret = btrfs_parse_options(tree_root, options); |
| 2458 | if (ret) { |
| 2459 | err = ret; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2460 | goto fail_alloc; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2461 | } |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2462 | |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2463 | features = btrfs_super_incompat_flags(disk_super) & |
| 2464 | ~BTRFS_FEATURE_INCOMPAT_SUPP; |
| 2465 | if (features) { |
| 2466 | printk(KERN_ERR "BTRFS: couldn't mount because of " |
| 2467 | "unsupported optional features (%Lx).\n", |
Geert Uytterhoeven | c1c9ff7 | 2013-08-20 13:20:07 +0200 | [diff] [blame] | 2468 | features); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2469 | err = -EINVAL; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2470 | goto fail_alloc; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2471 | } |
| 2472 | |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 2473 | /* |
| 2474 | * Leafsize and nodesize were always equal, this is only a sanity check. |
| 2475 | */ |
| 2476 | if (le32_to_cpu(disk_super->__unused_leafsize) != |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 2477 | btrfs_super_nodesize(disk_super)) { |
| 2478 | printk(KERN_ERR "BTRFS: couldn't mount because metadata " |
| 2479 | "blocksizes don't match. node %d leaf %d\n", |
| 2480 | btrfs_super_nodesize(disk_super), |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 2481 | le32_to_cpu(disk_super->__unused_leafsize)); |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 2482 | err = -EINVAL; |
| 2483 | goto fail_alloc; |
| 2484 | } |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 2485 | if (btrfs_super_nodesize(disk_super) > BTRFS_MAX_METADATA_BLOCKSIZE) { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 2486 | printk(KERN_ERR "BTRFS: couldn't mount because metadata " |
| 2487 | "blocksize (%d) was too large\n", |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 2488 | btrfs_super_nodesize(disk_super)); |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 2489 | err = -EINVAL; |
| 2490 | goto fail_alloc; |
| 2491 | } |
| 2492 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2493 | features = btrfs_super_incompat_flags(disk_super); |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 2494 | features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; |
Li Zefan | 69e380d | 2012-06-11 17:10:51 +0800 | [diff] [blame] | 2495 | if (tree_root->fs_info->compress_type == BTRFS_COMPRESS_LZO) |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 2496 | features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 2497 | |
Josef Bacik | 3173a18 | 2013-03-07 14:22:04 -0500 | [diff] [blame] | 2498 | if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2499 | printk(KERN_ERR "BTRFS: has skinny extents\n"); |
Josef Bacik | 3173a18 | 2013-03-07 14:22:04 -0500 | [diff] [blame] | 2500 | |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 2501 | /* |
| 2502 | * flag our filesystem as having big metadata blocks if |
| 2503 | * they are bigger than the page size |
| 2504 | */ |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 2505 | if (btrfs_super_nodesize(disk_super) > PAGE_CACHE_SIZE) { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 2506 | if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2507 | printk(KERN_INFO "BTRFS: flagging fs with big metadata feature\n"); |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 2508 | features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; |
| 2509 | } |
| 2510 | |
Chris Mason | bc3f116 | 2012-03-29 17:02:47 -0400 | [diff] [blame] | 2511 | nodesize = btrfs_super_nodesize(disk_super); |
Chris Mason | bc3f116 | 2012-03-29 17:02:47 -0400 | [diff] [blame] | 2512 | sectorsize = btrfs_super_sectorsize(disk_super); |
| 2513 | stripesize = btrfs_super_stripesize(disk_super); |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 2514 | fs_info->dirty_metadata_batch = nodesize * (1 + ilog2(nr_cpu_ids)); |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 2515 | fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); |
Chris Mason | bc3f116 | 2012-03-29 17:02:47 -0400 | [diff] [blame] | 2516 | |
| 2517 | /* |
| 2518 | * mixed block groups end up with duplicate but slightly offset |
| 2519 | * extent buffers for the same range. It leads to corruptions |
| 2520 | */ |
| 2521 | if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 2522 | (sectorsize != nodesize)) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2523 | printk(KERN_WARNING "BTRFS: unequal leaf/node/sector sizes " |
Chris Mason | bc3f116 | 2012-03-29 17:02:47 -0400 | [diff] [blame] | 2524 | "are not allowed for mixed block groups on %s\n", |
| 2525 | sb->s_id); |
| 2526 | goto fail_alloc; |
| 2527 | } |
| 2528 | |
Miao Xie | ceda086 | 2013-04-11 10:30:16 +0000 | [diff] [blame] | 2529 | /* |
| 2530 | * Needn't use the lock because there is no other task which will |
| 2531 | * update the flag. |
| 2532 | */ |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 2533 | btrfs_set_super_incompat_flags(disk_super, features); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2534 | |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2535 | features = btrfs_super_compat_ro_flags(disk_super) & |
| 2536 | ~BTRFS_FEATURE_COMPAT_RO_SUPP; |
| 2537 | if (!(sb->s_flags & MS_RDONLY) && features) { |
| 2538 | printk(KERN_ERR "BTRFS: couldn't mount RDWR because of " |
| 2539 | "unsupported option features (%Lx).\n", |
Geert Uytterhoeven | c1c9ff7 | 2013-08-20 13:20:07 +0200 | [diff] [blame] | 2540 | features); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2541 | err = -EINVAL; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2542 | goto fail_alloc; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2543 | } |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2544 | |
Qu Wenruo | 5cdc7ad3 | 2014-02-28 10:46:06 +0800 | [diff] [blame] | 2545 | max_active = fs_info->thread_pool_size; |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2546 | |
Qu Wenruo | 5cdc7ad3 | 2014-02-28 10:46:06 +0800 | [diff] [blame] | 2547 | fs_info->workers = |
| 2548 | btrfs_alloc_workqueue("worker", flags | WQ_HIGHPRI, |
| 2549 | max_active, 16); |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 2550 | |
Qu Wenruo | afe3d24 | 2014-02-28 10:46:07 +0800 | [diff] [blame] | 2551 | fs_info->delalloc_workers = |
| 2552 | btrfs_alloc_workqueue("delalloc", flags, max_active, 2); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2553 | |
Qu Wenruo | a44903a | 2014-02-28 10:46:09 +0800 | [diff] [blame] | 2554 | fs_info->flush_workers = |
| 2555 | btrfs_alloc_workqueue("flush_delalloc", flags, max_active, 0); |
Miao Xie | 8ccf6f19 | 2012-10-25 09:28:04 +0000 | [diff] [blame] | 2556 | |
Qu Wenruo | e66f0bb | 2014-02-28 10:46:12 +0800 | [diff] [blame] | 2557 | fs_info->caching_workers = |
| 2558 | btrfs_alloc_workqueue("cache", flags, max_active, 0); |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 2559 | |
Qu Wenruo | a8c93d4 | 2014-02-28 10:46:08 +0800 | [diff] [blame] | 2560 | /* |
| 2561 | * a higher idle thresh on the submit workers makes it much more |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 2562 | * likely that bios will be send down in a sane order to the |
| 2563 | * devices |
| 2564 | */ |
Qu Wenruo | a8c93d4 | 2014-02-28 10:46:08 +0800 | [diff] [blame] | 2565 | fs_info->submit_workers = |
| 2566 | btrfs_alloc_workqueue("submit", flags, |
| 2567 | min_t(u64, fs_devices->num_devices, |
| 2568 | max_active), 64); |
Chris Mason | 5386323 | 2008-08-15 15:34:18 -0400 | [diff] [blame] | 2569 | |
Qu Wenruo | dc6e320 | 2014-02-28 10:46:14 +0800 | [diff] [blame] | 2570 | fs_info->fixup_workers = |
| 2571 | btrfs_alloc_workqueue("fixup", flags, 1, 0); |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 2572 | |
| 2573 | /* |
| 2574 | * endios are largely parallel and should have a very |
| 2575 | * low idle thresh |
| 2576 | */ |
Qu Wenruo | fccb5d8 | 2014-02-28 10:46:10 +0800 | [diff] [blame] | 2577 | fs_info->endio_workers = |
| 2578 | btrfs_alloc_workqueue("endio", flags, max_active, 4); |
| 2579 | fs_info->endio_meta_workers = |
| 2580 | btrfs_alloc_workqueue("endio-meta", flags, max_active, 4); |
| 2581 | fs_info->endio_meta_write_workers = |
| 2582 | btrfs_alloc_workqueue("endio-meta-write", flags, max_active, 2); |
| 2583 | fs_info->endio_raid56_workers = |
| 2584 | btrfs_alloc_workqueue("endio-raid56", flags, max_active, 4); |
Miao Xie | 8b110e3 | 2014-09-12 18:44:03 +0800 | [diff] [blame] | 2585 | fs_info->endio_repair_workers = |
| 2586 | btrfs_alloc_workqueue("endio-repair", flags, 1, 0); |
Qu Wenruo | d05a33a | 2014-02-28 10:46:11 +0800 | [diff] [blame] | 2587 | fs_info->rmw_workers = |
| 2588 | btrfs_alloc_workqueue("rmw", flags, max_active, 2); |
Qu Wenruo | fccb5d8 | 2014-02-28 10:46:10 +0800 | [diff] [blame] | 2589 | fs_info->endio_write_workers = |
| 2590 | btrfs_alloc_workqueue("endio-write", flags, max_active, 2); |
| 2591 | fs_info->endio_freespace_worker = |
| 2592 | btrfs_alloc_workqueue("freespace-write", flags, max_active, 0); |
Qu Wenruo | 5b3bc44 | 2014-02-28 10:46:15 +0800 | [diff] [blame] | 2593 | fs_info->delayed_workers = |
| 2594 | btrfs_alloc_workqueue("delayed-meta", flags, max_active, 0); |
Qu Wenruo | 736cfa1 | 2014-02-28 10:46:13 +0800 | [diff] [blame] | 2595 | fs_info->readahead_workers = |
| 2596 | btrfs_alloc_workqueue("readahead", flags, max_active, 2); |
Qu Wenruo | fc97fab | 2014-02-28 10:46:16 +0800 | [diff] [blame] | 2597 | fs_info->qgroup_rescan_workers = |
| 2598 | btrfs_alloc_workqueue("qgroup-rescan", flags, 1, 0); |
Chris Mason | a79b7d4 | 2014-05-22 16:18:52 -0700 | [diff] [blame] | 2599 | fs_info->extent_workers = |
| 2600 | btrfs_alloc_workqueue("extent-refs", flags, |
| 2601 | min_t(u64, fs_devices->num_devices, |
| 2602 | max_active), 8); |
Chris Mason | b51912c | 2009-02-04 09:23:24 -0500 | [diff] [blame] | 2603 | |
Qu Wenruo | a8c93d4 | 2014-02-28 10:46:08 +0800 | [diff] [blame] | 2604 | if (!(fs_info->workers && fs_info->delalloc_workers && |
Qu Wenruo | fccb5d8 | 2014-02-28 10:46:10 +0800 | [diff] [blame] | 2605 | fs_info->submit_workers && fs_info->flush_workers && |
| 2606 | fs_info->endio_workers && fs_info->endio_meta_workers && |
| 2607 | fs_info->endio_meta_write_workers && |
Miao Xie | 8b110e3 | 2014-09-12 18:44:03 +0800 | [diff] [blame] | 2608 | fs_info->endio_repair_workers && |
Qu Wenruo | fccb5d8 | 2014-02-28 10:46:10 +0800 | [diff] [blame] | 2609 | fs_info->endio_write_workers && fs_info->endio_raid56_workers && |
Qu Wenruo | e66f0bb | 2014-02-28 10:46:12 +0800 | [diff] [blame] | 2610 | fs_info->endio_freespace_worker && fs_info->rmw_workers && |
Qu Wenruo | dc6e320 | 2014-02-28 10:46:14 +0800 | [diff] [blame] | 2611 | fs_info->caching_workers && fs_info->readahead_workers && |
Qu Wenruo | fc97fab | 2014-02-28 10:46:16 +0800 | [diff] [blame] | 2612 | fs_info->fixup_workers && fs_info->delayed_workers && |
Andrey Utkin | 56094ee | 2014-08-09 14:51:15 +0300 | [diff] [blame] | 2613 | fs_info->extent_workers && |
Qu Wenruo | fc97fab | 2014-02-28 10:46:16 +0800 | [diff] [blame] | 2614 | fs_info->qgroup_rescan_workers)) { |
Ilya Dryomov | fed425c | 2012-06-22 12:13:01 -0600 | [diff] [blame] | 2615 | err = -ENOMEM; |
Josef Bacik | 0dc3b84 | 2011-11-18 14:37:27 -0500 | [diff] [blame] | 2616 | goto fail_sb_buffer; |
| 2617 | } |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 2618 | |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 2619 | fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 2620 | fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, |
| 2621 | 4 * 1024 * 1024 / PAGE_CACHE_SIZE); |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 2622 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2623 | tree_root->nodesize = nodesize; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2624 | tree_root->sectorsize = sectorsize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 2625 | tree_root->stripesize = stripesize; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2626 | |
| 2627 | sb->s_blocksize = sectorsize; |
| 2628 | sb->s_blocksize_bits = blksize_bits(sectorsize); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2629 | |
Qu Wenruo | 3cae210 | 2013-07-16 11:19:18 +0800 | [diff] [blame] | 2630 | if (btrfs_super_magic(disk_super) != BTRFS_MAGIC) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2631 | printk(KERN_INFO "BTRFS: valid FS not found on %s\n", sb->s_id); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2632 | goto fail_sb_buffer; |
| 2633 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 2634 | |
Liu Bo | 8d082fb | 2012-04-03 09:56:53 +0800 | [diff] [blame] | 2635 | if (sectorsize != PAGE_SIZE) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2636 | printk(KERN_WARNING "BTRFS: Incompatible sector size(%lu) " |
Liu Bo | 8d082fb | 2012-04-03 09:56:53 +0800 | [diff] [blame] | 2637 | "found on %s\n", (unsigned long)sectorsize, sb->s_id); |
Keith Mannthey | 941b2dd | 2011-11-29 17:44:12 -0800 | [diff] [blame] | 2638 | goto fail_sb_buffer; |
| 2639 | } |
| 2640 | |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2641 | mutex_lock(&fs_info->chunk_mutex); |
Yan Zheng | e4404d6 | 2008-12-12 10:03:26 -0500 | [diff] [blame] | 2642 | ret = btrfs_read_sys_array(tree_root); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2643 | mutex_unlock(&fs_info->chunk_mutex); |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 2644 | if (ret) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2645 | printk(KERN_WARNING "BTRFS: failed to read the system " |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2646 | "array on %s\n", sb->s_id); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2647 | goto fail_sb_buffer; |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 2648 | } |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2649 | |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2650 | generation = btrfs_super_chunk_root_generation(disk_super); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2651 | |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 2652 | __setup_root(nodesize, sectorsize, stripesize, chunk_root, |
| 2653 | fs_info, BTRFS_CHUNK_TREE_OBJECTID); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2654 | |
| 2655 | chunk_root->node = read_tree_block(chunk_root, |
| 2656 | btrfs_super_chunk_root(disk_super), |
David Sterba | ce86cd5 | 2014-06-15 01:07:32 +0200 | [diff] [blame] | 2657 | generation); |
Josef Bacik | 416bc65 | 2013-04-23 14:17:42 -0400 | [diff] [blame] | 2658 | if (!chunk_root->node || |
| 2659 | !test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2660 | printk(KERN_WARNING "BTRFS: failed to read chunk root on %s\n", |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 2661 | sb->s_id); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2662 | goto fail_tree_roots; |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 2663 | } |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2664 | btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); |
| 2665 | chunk_root->commit_root = btrfs_root_node(chunk_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2666 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 2667 | read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, |
Geert Uytterhoeven | b308bc2 | 2013-08-20 13:20:15 +0200 | [diff] [blame] | 2668 | btrfs_header_chunk_tree_uuid(chunk_root->node), BTRFS_UUID_SIZE); |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 2669 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2670 | ret = btrfs_read_chunk_tree(chunk_root); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2671 | if (ret) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2672 | printk(KERN_WARNING "BTRFS: failed to read chunk tree on %s\n", |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2673 | sb->s_id); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2674 | goto fail_tree_roots; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2675 | } |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2676 | |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 2677 | /* |
| 2678 | * keep the device that is marked to be the target device for the |
| 2679 | * dev_replace procedure |
| 2680 | */ |
| 2681 | btrfs_close_extra_devices(fs_info, fs_devices, 0); |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2682 | |
Chris Mason | a6b0d5c | 2012-02-20 20:53:43 -0500 | [diff] [blame] | 2683 | if (!fs_devices->latest_bdev) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2684 | printk(KERN_CRIT "BTRFS: failed to read devices on %s\n", |
Chris Mason | a6b0d5c | 2012-02-20 20:53:43 -0500 | [diff] [blame] | 2685 | sb->s_id); |
| 2686 | goto fail_tree_roots; |
| 2687 | } |
| 2688 | |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2689 | retry_root_backup: |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2690 | generation = btrfs_super_generation(disk_super); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2691 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 2692 | tree_root->node = read_tree_block(tree_root, |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2693 | btrfs_super_root(disk_super), |
David Sterba | ce86cd5 | 2014-06-15 01:07:32 +0200 | [diff] [blame] | 2694 | generation); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2695 | if (!tree_root->node || |
| 2696 | !test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2697 | printk(KERN_WARNING "BTRFS: failed to read tree root on %s\n", |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 2698 | sb->s_id); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2699 | |
| 2700 | goto recovery_tree_root; |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 2701 | } |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2702 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2703 | btrfs_set_root_node(&tree_root->root_item, tree_root->node); |
| 2704 | tree_root->commit_root = btrfs_root_node(tree_root); |
Stefan Behrens | 69e9c6c | 2013-09-05 16:58:43 +0200 | [diff] [blame] | 2705 | btrfs_set_root_refs(&tree_root->root_item, 1); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2706 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2707 | location.objectid = BTRFS_EXTENT_TREE_OBJECTID; |
| 2708 | location.type = BTRFS_ROOT_ITEM_KEY; |
| 2709 | location.offset = 0; |
| 2710 | |
| 2711 | extent_root = btrfs_read_tree_root(tree_root, &location); |
| 2712 | if (IS_ERR(extent_root)) { |
| 2713 | ret = PTR_ERR(extent_root); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2714 | goto recovery_tree_root; |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2715 | } |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 2716 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &extent_root->state); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2717 | fs_info->extent_root = extent_root; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2718 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2719 | location.objectid = BTRFS_DEV_TREE_OBJECTID; |
| 2720 | dev_root = btrfs_read_tree_root(tree_root, &location); |
| 2721 | if (IS_ERR(dev_root)) { |
| 2722 | ret = PTR_ERR(dev_root); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2723 | goto recovery_tree_root; |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2724 | } |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 2725 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &dev_root->state); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2726 | fs_info->dev_root = dev_root; |
| 2727 | btrfs_init_devices_late(fs_info); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 2728 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2729 | location.objectid = BTRFS_CSUM_TREE_OBJECTID; |
| 2730 | csum_root = btrfs_read_tree_root(tree_root, &location); |
| 2731 | if (IS_ERR(csum_root)) { |
| 2732 | ret = PTR_ERR(csum_root); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2733 | goto recovery_tree_root; |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2734 | } |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 2735 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &csum_root->state); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2736 | fs_info->csum_root = csum_root; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2737 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2738 | location.objectid = BTRFS_QUOTA_TREE_OBJECTID; |
| 2739 | quota_root = btrfs_read_tree_root(tree_root, &location); |
| 2740 | if (!IS_ERR(quota_root)) { |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 2741 | set_bit(BTRFS_ROOT_TRACK_DIRTY, "a_root->state); |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2742 | fs_info->quota_enabled = 1; |
| 2743 | fs_info->pending_quota_state = 1; |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2744 | fs_info->quota_root = quota_root; |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2745 | } |
| 2746 | |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 2747 | location.objectid = BTRFS_UUID_TREE_OBJECTID; |
| 2748 | uuid_root = btrfs_read_tree_root(tree_root, &location); |
| 2749 | if (IS_ERR(uuid_root)) { |
| 2750 | ret = PTR_ERR(uuid_root); |
| 2751 | if (ret != -ENOENT) |
| 2752 | goto recovery_tree_root; |
| 2753 | create_uuid_tree = true; |
Stefan Behrens | 70f8017 | 2013-08-15 17:11:23 +0200 | [diff] [blame] | 2754 | check_uuid_tree = false; |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 2755 | } else { |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 2756 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &uuid_root->state); |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 2757 | fs_info->uuid_root = uuid_root; |
Stefan Behrens | 70f8017 | 2013-08-15 17:11:23 +0200 | [diff] [blame] | 2758 | create_uuid_tree = false; |
| 2759 | check_uuid_tree = |
| 2760 | generation != btrfs_super_uuid_tree_generation(disk_super); |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 2761 | } |
| 2762 | |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2763 | fs_info->generation = generation; |
| 2764 | fs_info->last_trans_committed = generation; |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2765 | |
Ilya Dryomov | 68310a5 | 2012-06-22 12:24:12 -0600 | [diff] [blame] | 2766 | ret = btrfs_recover_balance(fs_info); |
| 2767 | if (ret) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2768 | printk(KERN_WARNING "BTRFS: failed to recover balance\n"); |
Ilya Dryomov | 68310a5 | 2012-06-22 12:24:12 -0600 | [diff] [blame] | 2769 | goto fail_block_groups; |
| 2770 | } |
| 2771 | |
Stefan Behrens | 733f4fb | 2012-05-25 16:06:10 +0200 | [diff] [blame] | 2772 | ret = btrfs_init_dev_stats(fs_info); |
| 2773 | if (ret) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2774 | printk(KERN_ERR "BTRFS: failed to init dev_stats: %d\n", |
Stefan Behrens | 733f4fb | 2012-05-25 16:06:10 +0200 | [diff] [blame] | 2775 | ret); |
| 2776 | goto fail_block_groups; |
| 2777 | } |
| 2778 | |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 2779 | ret = btrfs_init_dev_replace(fs_info); |
| 2780 | if (ret) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2781 | pr_err("BTRFS: failed to init dev_replace: %d\n", ret); |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 2782 | goto fail_block_groups; |
| 2783 | } |
| 2784 | |
| 2785 | btrfs_close_extra_devices(fs_info, fs_devices, 1); |
| 2786 | |
Jeff Mahoney | 5ac1d20 | 2013-11-01 13:06:58 -0400 | [diff] [blame] | 2787 | ret = btrfs_sysfs_add_one(fs_info); |
| 2788 | if (ret) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2789 | pr_err("BTRFS: failed to init sysfs interface: %d\n", ret); |
Jeff Mahoney | 5ac1d20 | 2013-11-01 13:06:58 -0400 | [diff] [blame] | 2790 | goto fail_block_groups; |
| 2791 | } |
| 2792 | |
liubo | c59021f | 2011-03-07 02:13:14 +0000 | [diff] [blame] | 2793 | ret = btrfs_init_space_info(fs_info); |
| 2794 | if (ret) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2795 | printk(KERN_ERR "BTRFS: Failed to initial space info: %d\n", ret); |
Anand Jain | 2365dd3 | 2014-01-22 11:15:51 +0800 | [diff] [blame] | 2796 | goto fail_sysfs; |
liubo | c59021f | 2011-03-07 02:13:14 +0000 | [diff] [blame] | 2797 | } |
| 2798 | |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 2799 | ret = btrfs_read_block_groups(extent_root); |
| 2800 | if (ret) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2801 | printk(KERN_ERR "BTRFS: Failed to read block groups: %d\n", ret); |
Anand Jain | 2365dd3 | 2014-01-22 11:15:51 +0800 | [diff] [blame] | 2802 | goto fail_sysfs; |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 2803 | } |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 2804 | fs_info->num_tolerated_disk_barrier_failures = |
| 2805 | btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); |
Stefan Behrens | 292fd7f | 2012-10-30 17:16:16 +0000 | [diff] [blame] | 2806 | if (fs_info->fs_devices->missing_devices > |
| 2807 | fs_info->num_tolerated_disk_barrier_failures && |
| 2808 | !(sb->s_flags & MS_RDONLY)) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2809 | printk(KERN_WARNING "BTRFS: " |
| 2810 | "too many missing devices, writeable mount is not allowed\n"); |
Anand Jain | 2365dd3 | 2014-01-22 11:15:51 +0800 | [diff] [blame] | 2811 | goto fail_sysfs; |
Stefan Behrens | 292fd7f | 2012-10-30 17:16:16 +0000 | [diff] [blame] | 2812 | } |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 2813 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2814 | fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, |
| 2815 | "btrfs-cleaner"); |
Qinghuang Feng | 57506d5 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2816 | if (IS_ERR(fs_info->cleaner_kthread)) |
Anand Jain | 2365dd3 | 2014-01-22 11:15:51 +0800 | [diff] [blame] | 2817 | goto fail_sysfs; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2818 | |
| 2819 | fs_info->transaction_kthread = kthread_run(transaction_kthread, |
| 2820 | tree_root, |
| 2821 | "btrfs-transaction"); |
Qinghuang Feng | 57506d5 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2822 | if (IS_ERR(fs_info->transaction_kthread)) |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2823 | goto fail_cleaner; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2824 | |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 2825 | if (!btrfs_test_opt(tree_root, SSD) && |
| 2826 | !btrfs_test_opt(tree_root, NOSSD) && |
| 2827 | !fs_info->fs_devices->rotating) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2828 | printk(KERN_INFO "BTRFS: detected SSD devices, enabling SSD " |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 2829 | "mode\n"); |
| 2830 | btrfs_set_opt(fs_info->mount_opt, SSD); |
| 2831 | } |
| 2832 | |
Qu Wenruo | 3818aea | 2014-01-13 13:36:06 +0800 | [diff] [blame] | 2833 | /* Set the real inode map cache flag */ |
| 2834 | if (btrfs_test_opt(tree_root, CHANGE_INODE_CACHE)) |
| 2835 | btrfs_set_opt(tree_root->fs_info->mount_opt, INODE_MAP_CACHE); |
| 2836 | |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 2837 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
| 2838 | if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { |
| 2839 | ret = btrfsic_mount(tree_root, fs_devices, |
| 2840 | btrfs_test_opt(tree_root, |
| 2841 | CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? |
| 2842 | 1 : 0, |
| 2843 | fs_info->check_integrity_print_mask); |
| 2844 | if (ret) |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2845 | printk(KERN_WARNING "BTRFS: failed to initialize" |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 2846 | " integrity check module %s\n", sb->s_id); |
| 2847 | } |
| 2848 | #endif |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2849 | ret = btrfs_read_qgroup_config(fs_info); |
| 2850 | if (ret) |
| 2851 | goto fail_trans_kthread; |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 2852 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2853 | /* do not make disk changes in broken FS */ |
Stefan Behrens | 68ce968 | 2012-08-01 05:45:52 -0600 | [diff] [blame] | 2854 | if (btrfs_super_log_root(disk_super) != 0) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2855 | u64 bytenr = btrfs_super_log_root(disk_super); |
Chris Mason | d18a2c4 | 2008-04-04 15:40:00 -0400 | [diff] [blame] | 2856 | |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2857 | if (fs_devices->rw_devices == 0) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2858 | printk(KERN_WARNING "BTRFS: log replay required " |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2859 | "on RO media\n"); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2860 | err = -EIO; |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2861 | goto fail_qgroup; |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2862 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2863 | |
Al Viro | 6f07e42 | 2011-11-17 00:46:16 -0500 | [diff] [blame] | 2864 | log_tree_root = btrfs_alloc_root(fs_info); |
Dan Carpenter | 676e4c8 | 2010-05-29 09:43:07 +0000 | [diff] [blame] | 2865 | if (!log_tree_root) { |
| 2866 | err = -ENOMEM; |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2867 | goto fail_qgroup; |
Dan Carpenter | 676e4c8 | 2010-05-29 09:43:07 +0000 | [diff] [blame] | 2868 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2869 | |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 2870 | __setup_root(nodesize, sectorsize, stripesize, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2871 | log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); |
| 2872 | |
| 2873 | log_tree_root->node = read_tree_block(tree_root, bytenr, |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2874 | generation + 1); |
Josef Bacik | 416bc65 | 2013-04-23 14:17:42 -0400 | [diff] [blame] | 2875 | if (!log_tree_root->node || |
| 2876 | !extent_buffer_uptodate(log_tree_root->node)) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2877 | printk(KERN_ERR "BTRFS: failed to read log tree\n"); |
Josef Bacik | 416bc65 | 2013-04-23 14:17:42 -0400 | [diff] [blame] | 2878 | free_extent_buffer(log_tree_root->node); |
| 2879 | kfree(log_tree_root); |
Wang Shilong | 28c16cb | 2014-04-23 19:33:35 +0800 | [diff] [blame] | 2880 | goto fail_qgroup; |
Josef Bacik | 416bc65 | 2013-04-23 14:17:42 -0400 | [diff] [blame] | 2881 | } |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2882 | /* returns with log_tree_root freed on success */ |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2883 | ret = btrfs_recover_log_trees(log_tree_root); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2884 | if (ret) { |
| 2885 | btrfs_error(tree_root->fs_info, ret, |
| 2886 | "Failed to recover log tree"); |
| 2887 | free_extent_buffer(log_tree_root->node); |
| 2888 | kfree(log_tree_root); |
Wang Shilong | 28c16cb | 2014-04-23 19:33:35 +0800 | [diff] [blame] | 2889 | goto fail_qgroup; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2890 | } |
Yan Zheng | e556ce2 | 2008-11-20 10:25:19 -0500 | [diff] [blame] | 2891 | |
| 2892 | if (sb->s_flags & MS_RDONLY) { |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2893 | ret = btrfs_commit_super(tree_root); |
| 2894 | if (ret) |
Wang Shilong | 28c16cb | 2014-04-23 19:33:35 +0800 | [diff] [blame] | 2895 | goto fail_qgroup; |
Yan Zheng | e556ce2 | 2008-11-20 10:25:19 -0500 | [diff] [blame] | 2896 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2897 | } |
Zheng Yan | 1a40e23 | 2008-09-26 10:09:34 -0400 | [diff] [blame] | 2898 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2899 | ret = btrfs_find_orphan_roots(tree_root); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2900 | if (ret) |
Wang Shilong | 28c16cb | 2014-04-23 19:33:35 +0800 | [diff] [blame] | 2901 | goto fail_qgroup; |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2902 | |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2903 | if (!(sb->s_flags & MS_RDONLY)) { |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2904 | ret = btrfs_cleanup_fs_roots(fs_info); |
Ilya Dryomov | 44c44af | 2012-06-22 12:14:13 -0600 | [diff] [blame] | 2905 | if (ret) |
Wang Shilong | 28c16cb | 2014-04-23 19:33:35 +0800 | [diff] [blame] | 2906 | goto fail_qgroup; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2907 | |
Wang Shilong | 5f31648 | 2014-06-26 11:08:16 +0800 | [diff] [blame] | 2908 | mutex_lock(&fs_info->cleaner_mutex); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2909 | ret = btrfs_recover_relocation(tree_root); |
Wang Shilong | 5f31648 | 2014-06-26 11:08:16 +0800 | [diff] [blame] | 2910 | mutex_unlock(&fs_info->cleaner_mutex); |
Miao Xie | d7ce584 | 2010-02-02 08:46:44 +0000 | [diff] [blame] | 2911 | if (ret < 0) { |
| 2912 | printk(KERN_WARNING |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2913 | "BTRFS: failed to recover relocation\n"); |
Miao Xie | d7ce584 | 2010-02-02 08:46:44 +0000 | [diff] [blame] | 2914 | err = -EINVAL; |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2915 | goto fail_qgroup; |
Miao Xie | d7ce584 | 2010-02-02 08:46:44 +0000 | [diff] [blame] | 2916 | } |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2917 | } |
Zheng Yan | 1a40e23 | 2008-09-26 10:09:34 -0400 | [diff] [blame] | 2918 | |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 2919 | location.objectid = BTRFS_FS_TREE_OBJECTID; |
| 2920 | location.type = BTRFS_ROOT_ITEM_KEY; |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2921 | location.offset = 0; |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 2922 | |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 2923 | fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); |
Dan Carpenter | 3140c9a | 2010-05-29 09:44:10 +0000 | [diff] [blame] | 2924 | if (IS_ERR(fs_info->fs_root)) { |
| 2925 | err = PTR_ERR(fs_info->fs_root); |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2926 | goto fail_qgroup; |
Dan Carpenter | 3140c9a | 2010-05-29 09:44:10 +0000 | [diff] [blame] | 2927 | } |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 2928 | |
Ilya Dryomov | 2b6ba62 | 2012-06-22 12:24:13 -0600 | [diff] [blame] | 2929 | if (sb->s_flags & MS_RDONLY) |
| 2930 | return 0; |
Ilya Dryomov | 5964101 | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 2931 | |
Ilya Dryomov | 2b6ba62 | 2012-06-22 12:24:13 -0600 | [diff] [blame] | 2932 | down_read(&fs_info->cleanup_work_sem); |
| 2933 | if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || |
| 2934 | (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { |
Josef Bacik | e3acc2a | 2010-01-26 14:30:53 +0000 | [diff] [blame] | 2935 | up_read(&fs_info->cleanup_work_sem); |
Ilya Dryomov | 2b6ba62 | 2012-06-22 12:24:13 -0600 | [diff] [blame] | 2936 | close_ctree(tree_root); |
| 2937 | return ret; |
| 2938 | } |
| 2939 | up_read(&fs_info->cleanup_work_sem); |
Ilya Dryomov | 5964101 | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 2940 | |
Ilya Dryomov | 2b6ba62 | 2012-06-22 12:24:13 -0600 | [diff] [blame] | 2941 | ret = btrfs_resume_balance_async(fs_info); |
| 2942 | if (ret) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2943 | printk(KERN_WARNING "BTRFS: failed to resume balance\n"); |
Ilya Dryomov | 2b6ba62 | 2012-06-22 12:24:13 -0600 | [diff] [blame] | 2944 | close_ctree(tree_root); |
| 2945 | return ret; |
Josef Bacik | e3acc2a | 2010-01-26 14:30:53 +0000 | [diff] [blame] | 2946 | } |
| 2947 | |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 2948 | ret = btrfs_resume_dev_replace_async(fs_info); |
| 2949 | if (ret) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2950 | pr_warn("BTRFS: failed to resume dev_replace\n"); |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 2951 | close_ctree(tree_root); |
| 2952 | return ret; |
| 2953 | } |
| 2954 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2955 | btrfs_qgroup_rescan_resume(fs_info); |
| 2956 | |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 2957 | if (create_uuid_tree) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2958 | pr_info("BTRFS: creating UUID tree\n"); |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 2959 | ret = btrfs_create_uuid_tree(fs_info); |
| 2960 | if (ret) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2961 | pr_warn("BTRFS: failed to create the UUID tree %d\n", |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 2962 | ret); |
| 2963 | close_ctree(tree_root); |
| 2964 | return ret; |
| 2965 | } |
Stefan Behrens | f420ee1 | 2013-08-15 17:11:24 +0200 | [diff] [blame] | 2966 | } else if (check_uuid_tree || |
| 2967 | btrfs_test_opt(tree_root, RESCAN_UUID_TREE)) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2968 | pr_info("BTRFS: checking UUID tree\n"); |
Stefan Behrens | 70f8017 | 2013-08-15 17:11:23 +0200 | [diff] [blame] | 2969 | ret = btrfs_check_uuid_tree(fs_info); |
| 2970 | if (ret) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2971 | pr_warn("BTRFS: failed to check the UUID tree %d\n", |
Stefan Behrens | 70f8017 | 2013-08-15 17:11:23 +0200 | [diff] [blame] | 2972 | ret); |
| 2973 | close_ctree(tree_root); |
| 2974 | return ret; |
| 2975 | } |
| 2976 | } else { |
| 2977 | fs_info->update_uuid_tree_gen = 1; |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 2978 | } |
| 2979 | |
Josef Bacik | 47ab2a6 | 2014-09-18 11:20:02 -0400 | [diff] [blame] | 2980 | fs_info->open = 1; |
| 2981 | |
Al Viro | ad2b2c8 | 2011-11-17 01:10:02 -0500 | [diff] [blame] | 2982 | return 0; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2983 | |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2984 | fail_qgroup: |
| 2985 | btrfs_free_qgroup_config(fs_info); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2986 | fail_trans_kthread: |
| 2987 | kthread_stop(fs_info->transaction_kthread); |
Josef Bacik | 54067ae | 2013-04-25 13:44:38 -0400 | [diff] [blame] | 2988 | btrfs_cleanup_transaction(fs_info->tree_root); |
Josef Bacik | faa2dbf | 2014-05-07 17:06:09 -0400 | [diff] [blame] | 2989 | btrfs_free_fs_roots(fs_info); |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2990 | fail_cleaner: |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2991 | kthread_stop(fs_info->cleaner_kthread); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2992 | |
| 2993 | /* |
| 2994 | * make sure we're done with the btree inode before we stop our |
| 2995 | * kthreads |
| 2996 | */ |
| 2997 | filemap_write_and_wait(fs_info->btree_inode->i_mapping); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2998 | |
Anand Jain | 2365dd3 | 2014-01-22 11:15:51 +0800 | [diff] [blame] | 2999 | fail_sysfs: |
| 3000 | btrfs_sysfs_remove_one(fs_info); |
| 3001 | |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 3002 | fail_block_groups: |
Josef Bacik | 54067ae | 2013-04-25 13:44:38 -0400 | [diff] [blame] | 3003 | btrfs_put_block_group_cache(fs_info); |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 3004 | btrfs_free_block_groups(fs_info); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 3005 | |
| 3006 | fail_tree_roots: |
| 3007 | free_root_pointers(fs_info, 1); |
Miao Xie | 2b8195b | 2013-02-07 06:01:35 +0000 | [diff] [blame] | 3008 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 3009 | |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 3010 | fail_sb_buffer: |
Liu Bo | 7abadb6 | 2013-03-17 02:10:31 +0000 | [diff] [blame] | 3011 | btrfs_stop_all_workers(fs_info); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 3012 | fail_alloc: |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 3013 | fail_iput: |
Ilya Dryomov | 586e46e | 2011-11-09 13:26:37 +0200 | [diff] [blame] | 3014 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
| 3015 | |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 3016 | iput(fs_info->btree_inode); |
Miao Xie | c404e0d | 2014-01-30 16:46:55 +0800 | [diff] [blame] | 3017 | fail_bio_counter: |
| 3018 | percpu_counter_destroy(&fs_info->bio_counter); |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 3019 | fail_delalloc_bytes: |
| 3020 | percpu_counter_destroy(&fs_info->delalloc_bytes); |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 3021 | fail_dirty_metadata_bytes: |
| 3022 | percpu_counter_destroy(&fs_info->dirty_metadata_bytes); |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 3023 | fail_bdi: |
Qinghuang Feng | 7e66285 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 3024 | bdi_destroy(&fs_info->bdi); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 3025 | fail_srcu: |
| 3026 | cleanup_srcu_struct(&fs_info->subvol_srcu); |
Qinghuang Feng | 7e66285 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 3027 | fail: |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 3028 | btrfs_free_stripe_hash_table(fs_info); |
Ilya Dryomov | 586e46e | 2011-11-09 13:26:37 +0200 | [diff] [blame] | 3029 | btrfs_close_devices(fs_info->fs_devices); |
Al Viro | ad2b2c8 | 2011-11-17 01:10:02 -0500 | [diff] [blame] | 3030 | return err; |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 3031 | |
| 3032 | recovery_tree_root: |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 3033 | if (!btrfs_test_opt(tree_root, RECOVERY)) |
| 3034 | goto fail_tree_roots; |
| 3035 | |
| 3036 | free_root_pointers(fs_info, 0); |
| 3037 | |
| 3038 | /* don't use the log in recovery mode, it won't be valid */ |
| 3039 | btrfs_set_super_log_root(disk_super, 0); |
| 3040 | |
| 3041 | /* we can't trust the free space cache either */ |
| 3042 | btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); |
| 3043 | |
| 3044 | ret = next_root_backup(fs_info, fs_info->super_copy, |
| 3045 | &num_backups_tried, &backup_index); |
| 3046 | if (ret == -1) |
| 3047 | goto fail_block_groups; |
| 3048 | goto retry_root_backup; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3049 | } |
| 3050 | |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3051 | static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) |
| 3052 | { |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3053 | if (uptodate) { |
| 3054 | set_buffer_uptodate(bh); |
| 3055 | } else { |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 3056 | struct btrfs_device *device = (struct btrfs_device *) |
| 3057 | bh->b_private; |
| 3058 | |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 3059 | printk_ratelimited_in_rcu(KERN_WARNING "BTRFS: lost page write due to " |
Josef Bacik | 606686e | 2012-06-04 14:03:51 -0400 | [diff] [blame] | 3060 | "I/O error on %s\n", |
| 3061 | rcu_str_deref(device->name)); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3062 | /* note, we dont' set_buffer_write_io_error because we have |
| 3063 | * our own ways of dealing with the IO errors |
| 3064 | */ |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3065 | clear_buffer_uptodate(bh); |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 3066 | btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3067 | } |
| 3068 | unlock_buffer(bh); |
| 3069 | put_bh(bh); |
| 3070 | } |
| 3071 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3072 | struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) |
| 3073 | { |
| 3074 | struct buffer_head *bh; |
| 3075 | struct buffer_head *latest = NULL; |
| 3076 | struct btrfs_super_block *super; |
| 3077 | int i; |
| 3078 | u64 transid = 0; |
| 3079 | u64 bytenr; |
| 3080 | |
| 3081 | /* we would like to check all the supers, but that would make |
| 3082 | * a btrfs mount succeed after a mkfs from a different FS. |
| 3083 | * So, we need to add a special mount option to scan for |
| 3084 | * later supers, using BTRFS_SUPER_MIRROR_MAX instead |
| 3085 | */ |
| 3086 | for (i = 0; i < 1; i++) { |
| 3087 | bytenr = btrfs_sb_offset(i); |
Anand Jain | 8068a47 | 2013-07-26 01:29:35 +0800 | [diff] [blame] | 3088 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= |
| 3089 | i_size_read(bdev->bd_inode)) |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3090 | break; |
Anand Jain | 8068a47 | 2013-07-26 01:29:35 +0800 | [diff] [blame] | 3091 | bh = __bread(bdev, bytenr / 4096, |
| 3092 | BTRFS_SUPER_INFO_SIZE); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3093 | if (!bh) |
| 3094 | continue; |
| 3095 | |
| 3096 | super = (struct btrfs_super_block *)bh->b_data; |
| 3097 | if (btrfs_super_bytenr(super) != bytenr || |
Qu Wenruo | 3cae210 | 2013-07-16 11:19:18 +0800 | [diff] [blame] | 3098 | btrfs_super_magic(super) != BTRFS_MAGIC) { |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3099 | brelse(bh); |
| 3100 | continue; |
| 3101 | } |
| 3102 | |
| 3103 | if (!latest || btrfs_super_generation(super) > transid) { |
| 3104 | brelse(latest); |
| 3105 | latest = bh; |
| 3106 | transid = btrfs_super_generation(super); |
| 3107 | } else { |
| 3108 | brelse(bh); |
| 3109 | } |
| 3110 | } |
| 3111 | return latest; |
| 3112 | } |
| 3113 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 3114 | /* |
| 3115 | * this should be called twice, once with wait == 0 and |
| 3116 | * once with wait == 1. When wait == 0 is done, all the buffer heads |
| 3117 | * we write are pinned. |
| 3118 | * |
| 3119 | * They are released when wait == 1 is done. |
| 3120 | * max_mirrors must be the same for both runs, and it indicates how |
| 3121 | * many supers on this one device should be written. |
| 3122 | * |
| 3123 | * max_mirrors == 0 means to write them all. |
| 3124 | */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3125 | static int write_dev_supers(struct btrfs_device *device, |
| 3126 | struct btrfs_super_block *sb, |
| 3127 | int do_barriers, int wait, int max_mirrors) |
| 3128 | { |
| 3129 | struct buffer_head *bh; |
| 3130 | int i; |
| 3131 | int ret; |
| 3132 | int errors = 0; |
| 3133 | u32 crc; |
| 3134 | u64 bytenr; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3135 | |
| 3136 | if (max_mirrors == 0) |
| 3137 | max_mirrors = BTRFS_SUPER_MIRROR_MAX; |
| 3138 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3139 | for (i = 0; i < max_mirrors; i++) { |
| 3140 | bytenr = btrfs_sb_offset(i); |
Miao Xie | 935e5cc | 2014-09-03 21:35:33 +0800 | [diff] [blame] | 3141 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= |
| 3142 | device->commit_total_bytes) |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3143 | break; |
| 3144 | |
| 3145 | if (wait) { |
| 3146 | bh = __find_get_block(device->bdev, bytenr / 4096, |
| 3147 | BTRFS_SUPER_INFO_SIZE); |
Josef Bacik | 634554d | 2013-04-29 10:05:57 -0400 | [diff] [blame] | 3148 | if (!bh) { |
| 3149 | errors++; |
| 3150 | continue; |
| 3151 | } |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3152 | wait_on_buffer(bh); |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 3153 | if (!buffer_uptodate(bh)) |
| 3154 | errors++; |
| 3155 | |
| 3156 | /* drop our reference */ |
| 3157 | brelse(bh); |
| 3158 | |
| 3159 | /* drop the reference from the wait == 0 run */ |
| 3160 | brelse(bh); |
| 3161 | continue; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3162 | } else { |
| 3163 | btrfs_set_super_bytenr(sb, bytenr); |
| 3164 | |
| 3165 | crc = ~(u32)0; |
Liu Bo | b049668 | 2013-03-14 14:57:45 +0000 | [diff] [blame] | 3166 | crc = btrfs_csum_data((char *)sb + |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3167 | BTRFS_CSUM_SIZE, crc, |
| 3168 | BTRFS_SUPER_INFO_SIZE - |
| 3169 | BTRFS_CSUM_SIZE); |
| 3170 | btrfs_csum_final(crc, sb->csum); |
| 3171 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 3172 | /* |
| 3173 | * one reference for us, and we leave it for the |
| 3174 | * caller |
| 3175 | */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3176 | bh = __getblk(device->bdev, bytenr / 4096, |
| 3177 | BTRFS_SUPER_INFO_SIZE); |
Josef Bacik | 634554d | 2013-04-29 10:05:57 -0400 | [diff] [blame] | 3178 | if (!bh) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 3179 | printk(KERN_ERR "BTRFS: couldn't get super " |
Josef Bacik | 634554d | 2013-04-29 10:05:57 -0400 | [diff] [blame] | 3180 | "buffer head for bytenr %Lu\n", bytenr); |
| 3181 | errors++; |
| 3182 | continue; |
| 3183 | } |
| 3184 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3185 | memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); |
| 3186 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 3187 | /* one reference for submit_bh */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3188 | get_bh(bh); |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 3189 | |
| 3190 | set_buffer_uptodate(bh); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3191 | lock_buffer(bh); |
| 3192 | bh->b_end_io = btrfs_end_buffer_write_sync; |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 3193 | bh->b_private = device; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3194 | } |
| 3195 | |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3196 | /* |
| 3197 | * we fua the first super. The others we allow |
| 3198 | * to go down lazy. |
| 3199 | */ |
Wang Shilong | e8117c2 | 2014-01-03 18:22:57 +0800 | [diff] [blame] | 3200 | if (i == 0) |
| 3201 | ret = btrfsic_submit_bh(WRITE_FUA, bh); |
| 3202 | else |
| 3203 | ret = btrfsic_submit_bh(WRITE_SYNC, bh); |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 3204 | if (ret) |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3205 | errors++; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3206 | } |
| 3207 | return errors < i ? 0 : -1; |
| 3208 | } |
| 3209 | |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3210 | /* |
| 3211 | * endio for the write_dev_flush, this will wake anyone waiting |
| 3212 | * for the barrier when it is done |
| 3213 | */ |
| 3214 | static void btrfs_end_empty_barrier(struct bio *bio, int err) |
| 3215 | { |
| 3216 | if (err) { |
| 3217 | if (err == -EOPNOTSUPP) |
| 3218 | set_bit(BIO_EOPNOTSUPP, &bio->bi_flags); |
| 3219 | clear_bit(BIO_UPTODATE, &bio->bi_flags); |
| 3220 | } |
| 3221 | if (bio->bi_private) |
| 3222 | complete(bio->bi_private); |
| 3223 | bio_put(bio); |
| 3224 | } |
| 3225 | |
| 3226 | /* |
| 3227 | * trigger flushes for one the devices. If you pass wait == 0, the flushes are |
| 3228 | * sent down. With wait == 1, it waits for the previous flush. |
| 3229 | * |
| 3230 | * any device where the flush fails with eopnotsupp are flagged as not-barrier |
| 3231 | * capable |
| 3232 | */ |
| 3233 | static int write_dev_flush(struct btrfs_device *device, int wait) |
| 3234 | { |
| 3235 | struct bio *bio; |
| 3236 | int ret = 0; |
| 3237 | |
| 3238 | if (device->nobarriers) |
| 3239 | return 0; |
| 3240 | |
| 3241 | if (wait) { |
| 3242 | bio = device->flush_bio; |
| 3243 | if (!bio) |
| 3244 | return 0; |
| 3245 | |
| 3246 | wait_for_completion(&device->flush_wait); |
| 3247 | |
| 3248 | if (bio_flagged(bio, BIO_EOPNOTSUPP)) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 3249 | printk_in_rcu("BTRFS: disabling barriers on dev %s\n", |
Josef Bacik | 606686e | 2012-06-04 14:03:51 -0400 | [diff] [blame] | 3250 | rcu_str_deref(device->name)); |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3251 | device->nobarriers = 1; |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3252 | } else if (!bio_flagged(bio, BIO_UPTODATE)) { |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3253 | ret = -EIO; |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3254 | btrfs_dev_stat_inc_and_print(device, |
| 3255 | BTRFS_DEV_STAT_FLUSH_ERRS); |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3256 | } |
| 3257 | |
| 3258 | /* drop the reference from the wait == 0 run */ |
| 3259 | bio_put(bio); |
| 3260 | device->flush_bio = NULL; |
| 3261 | |
| 3262 | return ret; |
| 3263 | } |
| 3264 | |
| 3265 | /* |
| 3266 | * one reference for us, and we leave it for the |
| 3267 | * caller |
| 3268 | */ |
Jesper Juhl | 9c017ab | 2012-02-27 00:04:56 +0100 | [diff] [blame] | 3269 | device->flush_bio = NULL; |
Chris Mason | 9be3395 | 2013-05-17 18:30:14 -0400 | [diff] [blame] | 3270 | bio = btrfs_io_bio_alloc(GFP_NOFS, 0); |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3271 | if (!bio) |
| 3272 | return -ENOMEM; |
| 3273 | |
| 3274 | bio->bi_end_io = btrfs_end_empty_barrier; |
| 3275 | bio->bi_bdev = device->bdev; |
| 3276 | init_completion(&device->flush_wait); |
| 3277 | bio->bi_private = &device->flush_wait; |
| 3278 | device->flush_bio = bio; |
| 3279 | |
| 3280 | bio_get(bio); |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 3281 | btrfsic_submit_bio(WRITE_FLUSH, bio); |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3282 | |
| 3283 | return 0; |
| 3284 | } |
| 3285 | |
| 3286 | /* |
| 3287 | * send an empty flush down to each device in parallel, |
| 3288 | * then wait for them |
| 3289 | */ |
| 3290 | static int barrier_all_devices(struct btrfs_fs_info *info) |
| 3291 | { |
| 3292 | struct list_head *head; |
| 3293 | struct btrfs_device *dev; |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3294 | int errors_send = 0; |
| 3295 | int errors_wait = 0; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3296 | int ret; |
| 3297 | |
| 3298 | /* send down all the barriers */ |
| 3299 | head = &info->fs_devices->devices; |
| 3300 | list_for_each_entry_rcu(dev, head, dev_list) { |
Hidetoshi Seto | f88ba6a | 2014-02-05 16:34:38 +0900 | [diff] [blame] | 3301 | if (dev->missing) |
| 3302 | continue; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3303 | if (!dev->bdev) { |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3304 | errors_send++; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3305 | continue; |
| 3306 | } |
| 3307 | if (!dev->in_fs_metadata || !dev->writeable) |
| 3308 | continue; |
| 3309 | |
| 3310 | ret = write_dev_flush(dev, 0); |
| 3311 | if (ret) |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3312 | errors_send++; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3313 | } |
| 3314 | |
| 3315 | /* wait for all the barriers */ |
| 3316 | list_for_each_entry_rcu(dev, head, dev_list) { |
Hidetoshi Seto | f88ba6a | 2014-02-05 16:34:38 +0900 | [diff] [blame] | 3317 | if (dev->missing) |
| 3318 | continue; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3319 | if (!dev->bdev) { |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3320 | errors_wait++; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3321 | continue; |
| 3322 | } |
| 3323 | if (!dev->in_fs_metadata || !dev->writeable) |
| 3324 | continue; |
| 3325 | |
| 3326 | ret = write_dev_flush(dev, 1); |
| 3327 | if (ret) |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3328 | errors_wait++; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3329 | } |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3330 | if (errors_send > info->num_tolerated_disk_barrier_failures || |
| 3331 | errors_wait > info->num_tolerated_disk_barrier_failures) |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3332 | return -EIO; |
| 3333 | return 0; |
| 3334 | } |
| 3335 | |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3336 | int btrfs_calc_num_tolerated_disk_barrier_failures( |
| 3337 | struct btrfs_fs_info *fs_info) |
| 3338 | { |
| 3339 | struct btrfs_ioctl_space_info space; |
| 3340 | struct btrfs_space_info *sinfo; |
| 3341 | u64 types[] = {BTRFS_BLOCK_GROUP_DATA, |
| 3342 | BTRFS_BLOCK_GROUP_SYSTEM, |
| 3343 | BTRFS_BLOCK_GROUP_METADATA, |
| 3344 | BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; |
| 3345 | int num_types = 4; |
| 3346 | int i; |
| 3347 | int c; |
| 3348 | int num_tolerated_disk_barrier_failures = |
| 3349 | (int)fs_info->fs_devices->num_devices; |
| 3350 | |
| 3351 | for (i = 0; i < num_types; i++) { |
| 3352 | struct btrfs_space_info *tmp; |
| 3353 | |
| 3354 | sinfo = NULL; |
| 3355 | rcu_read_lock(); |
| 3356 | list_for_each_entry_rcu(tmp, &fs_info->space_info, list) { |
| 3357 | if (tmp->flags == types[i]) { |
| 3358 | sinfo = tmp; |
| 3359 | break; |
| 3360 | } |
| 3361 | } |
| 3362 | rcu_read_unlock(); |
| 3363 | |
| 3364 | if (!sinfo) |
| 3365 | continue; |
| 3366 | |
| 3367 | down_read(&sinfo->groups_sem); |
| 3368 | for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { |
| 3369 | if (!list_empty(&sinfo->block_groups[c])) { |
| 3370 | u64 flags; |
| 3371 | |
| 3372 | btrfs_get_block_group_info( |
| 3373 | &sinfo->block_groups[c], &space); |
| 3374 | if (space.total_bytes == 0 || |
| 3375 | space.used_bytes == 0) |
| 3376 | continue; |
| 3377 | flags = space.flags; |
| 3378 | /* |
| 3379 | * return |
| 3380 | * 0: if dup, single or RAID0 is configured for |
| 3381 | * any of metadata, system or data, else |
| 3382 | * 1: if RAID5 is configured, or if RAID1 or |
| 3383 | * RAID10 is configured and only two mirrors |
| 3384 | * are used, else |
| 3385 | * 2: if RAID6 is configured, else |
| 3386 | * num_mirrors - 1: if RAID1 or RAID10 is |
| 3387 | * configured and more than |
| 3388 | * 2 mirrors are used. |
| 3389 | */ |
| 3390 | if (num_tolerated_disk_barrier_failures > 0 && |
| 3391 | ((flags & (BTRFS_BLOCK_GROUP_DUP | |
| 3392 | BTRFS_BLOCK_GROUP_RAID0)) || |
| 3393 | ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) |
| 3394 | == 0))) |
| 3395 | num_tolerated_disk_barrier_failures = 0; |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 3396 | else if (num_tolerated_disk_barrier_failures > 1) { |
| 3397 | if (flags & (BTRFS_BLOCK_GROUP_RAID1 | |
| 3398 | BTRFS_BLOCK_GROUP_RAID5 | |
| 3399 | BTRFS_BLOCK_GROUP_RAID10)) { |
| 3400 | num_tolerated_disk_barrier_failures = 1; |
| 3401 | } else if (flags & |
Henrik Nordvik | 15b0a89 | 2013-04-29 18:09:23 +0000 | [diff] [blame] | 3402 | BTRFS_BLOCK_GROUP_RAID6) { |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 3403 | num_tolerated_disk_barrier_failures = 2; |
| 3404 | } |
| 3405 | } |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3406 | } |
| 3407 | } |
| 3408 | up_read(&sinfo->groups_sem); |
| 3409 | } |
| 3410 | |
| 3411 | return num_tolerated_disk_barrier_failures; |
| 3412 | } |
| 3413 | |
Eric Sandeen | 48a3b63 | 2013-04-25 20:41:01 +0000 | [diff] [blame] | 3414 | static int write_all_supers(struct btrfs_root *root, int max_mirrors) |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3415 | { |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 3416 | struct list_head *head; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3417 | struct btrfs_device *dev; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3418 | struct btrfs_super_block *sb; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3419 | struct btrfs_dev_item *dev_item; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3420 | int ret; |
| 3421 | int do_barriers; |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3422 | int max_errors; |
| 3423 | int total_errors = 0; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3424 | u64 flags; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3425 | |
| 3426 | do_barriers = !btrfs_test_opt(root, NOBARRIER); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 3427 | backup_super_roots(root->fs_info); |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3428 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 3429 | sb = root->fs_info->super_for_commit; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3430 | dev_item = &sb->dev_item; |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 3431 | |
Chris Mason | 174ba50 | 2011-05-27 10:03:58 -0400 | [diff] [blame] | 3432 | mutex_lock(&root->fs_info->fs_devices->device_list_mutex); |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 3433 | head = &root->fs_info->fs_devices->devices; |
Filipe David Borba Manana | d730680 | 2013-08-09 15:41:36 +0100 | [diff] [blame] | 3434 | max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3435 | |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3436 | if (do_barriers) { |
| 3437 | ret = barrier_all_devices(root->fs_info); |
| 3438 | if (ret) { |
| 3439 | mutex_unlock( |
| 3440 | &root->fs_info->fs_devices->device_list_mutex); |
| 3441 | btrfs_error(root->fs_info, ret, |
| 3442 | "errors while submitting device barriers."); |
| 3443 | return ret; |
| 3444 | } |
| 3445 | } |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3446 | |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 3447 | list_for_each_entry_rcu(dev, head, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 3448 | if (!dev->bdev) { |
| 3449 | total_errors++; |
| 3450 | continue; |
| 3451 | } |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 3452 | if (!dev->in_fs_metadata || !dev->writeable) |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 3453 | continue; |
| 3454 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 3455 | btrfs_set_stack_device_generation(dev_item, 0); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3456 | btrfs_set_stack_device_type(dev_item, dev->type); |
| 3457 | btrfs_set_stack_device_id(dev_item, dev->devid); |
Miao Xie | 7df69d3 | 2014-07-24 11:37:13 +0800 | [diff] [blame] | 3458 | btrfs_set_stack_device_total_bytes(dev_item, |
Miao Xie | 935e5cc | 2014-09-03 21:35:33 +0800 | [diff] [blame] | 3459 | dev->commit_total_bytes); |
Miao Xie | ce7213c | 2014-09-03 21:35:34 +0800 | [diff] [blame] | 3460 | btrfs_set_stack_device_bytes_used(dev_item, |
| 3461 | dev->commit_bytes_used); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3462 | btrfs_set_stack_device_io_align(dev_item, dev->io_align); |
| 3463 | btrfs_set_stack_device_io_width(dev_item, dev->io_width); |
| 3464 | btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); |
| 3465 | memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 3466 | memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3467 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3468 | flags = btrfs_super_flags(sb); |
| 3469 | btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3470 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3471 | ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3472 | if (ret) |
| 3473 | total_errors++; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3474 | } |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3475 | if (total_errors > max_errors) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 3476 | btrfs_err(root->fs_info, "%d errors while writing supers", |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3477 | total_errors); |
Stefan Behrens | a724b43 | 2013-09-11 09:59:22 +0200 | [diff] [blame] | 3478 | mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3479 | |
Stefan Behrens | 9d565ba | 2013-08-09 17:08:40 +0200 | [diff] [blame] | 3480 | /* FUA is masked off if unsupported and can't be the reason */ |
| 3481 | btrfs_error(root->fs_info, -EIO, |
| 3482 | "%d errors while writing supers", total_errors); |
| 3483 | return -EIO; |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3484 | } |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3485 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3486 | total_errors = 0; |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 3487 | list_for_each_entry_rcu(dev, head, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 3488 | if (!dev->bdev) |
| 3489 | continue; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 3490 | if (!dev->in_fs_metadata || !dev->writeable) |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 3491 | continue; |
| 3492 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3493 | ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); |
| 3494 | if (ret) |
| 3495 | total_errors++; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3496 | } |
Chris Mason | 174ba50 | 2011-05-27 10:03:58 -0400 | [diff] [blame] | 3497 | mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3498 | if (total_errors > max_errors) { |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3499 | btrfs_error(root->fs_info, -EIO, |
| 3500 | "%d errors while writing supers", total_errors); |
| 3501 | return -EIO; |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3502 | } |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3503 | return 0; |
| 3504 | } |
| 3505 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3506 | int write_ctree_super(struct btrfs_trans_handle *trans, |
| 3507 | struct btrfs_root *root, int max_mirrors) |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 3508 | { |
Rashika | f570e757 | 2013-10-31 16:50:42 +0530 | [diff] [blame] | 3509 | return write_all_supers(root, max_mirrors); |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 3510 | } |
| 3511 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 3512 | /* Drop a fs root from the radix tree and free it. */ |
| 3513 | void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, |
| 3514 | struct btrfs_root *root) |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 3515 | { |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3516 | spin_lock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 3517 | radix_tree_delete(&fs_info->fs_roots_radix, |
| 3518 | (unsigned long)root->root_key.objectid); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3519 | spin_unlock(&fs_info->fs_roots_radix_lock); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 3520 | |
| 3521 | if (btrfs_root_refs(&root->root_item) == 0) |
| 3522 | synchronize_srcu(&fs_info->subvol_srcu); |
| 3523 | |
Liu Bo | 1a4319c | 2014-01-13 19:53:53 +0800 | [diff] [blame] | 3524 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) |
Liu Bo | 3321719 | 2013-02-27 13:28:24 +0000 | [diff] [blame] | 3525 | btrfs_free_log(NULL, root); |
Liu Bo | 3321719 | 2013-02-27 13:28:24 +0000 | [diff] [blame] | 3526 | |
Josef Bacik | faa2dbf | 2014-05-07 17:06:09 -0400 | [diff] [blame] | 3527 | if (root->free_ino_pinned) |
| 3528 | __btrfs_remove_free_space_cache(root->free_ino_pinned); |
| 3529 | if (root->free_ino_ctl) |
| 3530 | __btrfs_remove_free_space_cache(root->free_ino_ctl); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3531 | free_fs_root(root); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3532 | } |
| 3533 | |
| 3534 | static void free_fs_root(struct btrfs_root *root) |
| 3535 | { |
David Sterba | 57cdc8d | 2014-02-05 02:37:48 +0100 | [diff] [blame] | 3536 | iput(root->ino_cache_inode); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3537 | WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); |
Filipe David Borba Manana | 1cb048f | 2013-08-20 00:52:51 +0100 | [diff] [blame] | 3538 | btrfs_free_block_rsv(root, root->orphan_block_rsv); |
| 3539 | root->orphan_block_rsv = NULL; |
Al Viro | 0ee5dc6 | 2011-07-07 15:44:25 -0400 | [diff] [blame] | 3540 | if (root->anon_dev) |
| 3541 | free_anon_bdev(root->anon_dev); |
Miao Xie | 8257b2d | 2014-03-06 13:38:19 +0800 | [diff] [blame] | 3542 | if (root->subv_writers) |
| 3543 | btrfs_free_subvolume_writers(root->subv_writers); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3544 | free_extent_buffer(root->node); |
| 3545 | free_extent_buffer(root->commit_root); |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 3546 | kfree(root->free_ino_ctl); |
| 3547 | kfree(root->free_ino_pinned); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3548 | kfree(root->name); |
Miao Xie | b0feb9d | 2013-05-15 07:48:20 +0000 | [diff] [blame] | 3549 | btrfs_put_fs_root(root); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 3550 | } |
| 3551 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 3552 | void btrfs_free_fs_root(struct btrfs_root *root) |
| 3553 | { |
| 3554 | free_fs_root(root); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3555 | } |
| 3556 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3557 | int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) |
| 3558 | { |
| 3559 | u64 root_objectid = 0; |
| 3560 | struct btrfs_root *gang[8]; |
Qu Wenruo | 65d33fd | 2014-04-22 17:13:51 +0800 | [diff] [blame] | 3561 | int i = 0; |
| 3562 | int err = 0; |
| 3563 | unsigned int ret = 0; |
| 3564 | int index; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3565 | |
| 3566 | while (1) { |
Qu Wenruo | 65d33fd | 2014-04-22 17:13:51 +0800 | [diff] [blame] | 3567 | index = srcu_read_lock(&fs_info->subvol_srcu); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3568 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
| 3569 | (void **)gang, root_objectid, |
| 3570 | ARRAY_SIZE(gang)); |
Qu Wenruo | 65d33fd | 2014-04-22 17:13:51 +0800 | [diff] [blame] | 3571 | if (!ret) { |
| 3572 | srcu_read_unlock(&fs_info->subvol_srcu, index); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3573 | break; |
Qu Wenruo | 65d33fd | 2014-04-22 17:13:51 +0800 | [diff] [blame] | 3574 | } |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 3575 | root_objectid = gang[ret - 1]->root_key.objectid + 1; |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 3576 | |
Qu Wenruo | 65d33fd | 2014-04-22 17:13:51 +0800 | [diff] [blame] | 3577 | for (i = 0; i < ret; i++) { |
| 3578 | /* Avoid to grab roots in dead_roots */ |
| 3579 | if (btrfs_root_refs(&gang[i]->root_item) == 0) { |
| 3580 | gang[i] = NULL; |
| 3581 | continue; |
| 3582 | } |
| 3583 | /* grab all the search result for later use */ |
| 3584 | gang[i] = btrfs_grab_fs_root(gang[i]); |
| 3585 | } |
| 3586 | srcu_read_unlock(&fs_info->subvol_srcu, index); |
| 3587 | |
| 3588 | for (i = 0; i < ret; i++) { |
| 3589 | if (!gang[i]) |
| 3590 | continue; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3591 | root_objectid = gang[i]->root_key.objectid; |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 3592 | err = btrfs_orphan_cleanup(gang[i]); |
| 3593 | if (err) |
Qu Wenruo | 65d33fd | 2014-04-22 17:13:51 +0800 | [diff] [blame] | 3594 | break; |
| 3595 | btrfs_put_fs_root(gang[i]); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3596 | } |
| 3597 | root_objectid++; |
| 3598 | } |
Qu Wenruo | 65d33fd | 2014-04-22 17:13:51 +0800 | [diff] [blame] | 3599 | |
| 3600 | /* release the uncleaned roots due to error */ |
| 3601 | for (; i < ret; i++) { |
| 3602 | if (gang[i]) |
| 3603 | btrfs_put_fs_root(gang[i]); |
| 3604 | } |
| 3605 | return err; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3606 | } |
| 3607 | |
| 3608 | int btrfs_commit_super(struct btrfs_root *root) |
| 3609 | { |
| 3610 | struct btrfs_trans_handle *trans; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3611 | |
| 3612 | mutex_lock(&root->fs_info->cleaner_mutex); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 3613 | btrfs_run_delayed_iputs(root); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3614 | mutex_unlock(&root->fs_info->cleaner_mutex); |
David Sterba | 9d1a2a3 | 2013-03-12 15:13:28 +0000 | [diff] [blame] | 3615 | wake_up_process(root->fs_info->cleaner_kthread); |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 3616 | |
| 3617 | /* wait until ongoing cleanup work done */ |
| 3618 | down_write(&root->fs_info->cleanup_work_sem); |
| 3619 | up_write(&root->fs_info->cleanup_work_sem); |
| 3620 | |
Josef Bacik | 7a7eaa4 | 2011-04-13 12:54:33 -0400 | [diff] [blame] | 3621 | trans = btrfs_join_transaction(root); |
Tsutomu Itoh | 3612b49 | 2011-01-25 02:51:38 +0000 | [diff] [blame] | 3622 | if (IS_ERR(trans)) |
| 3623 | return PTR_ERR(trans); |
Liu Bo | d52c1bc | 2013-11-05 11:45:53 +0800 | [diff] [blame] | 3624 | return btrfs_commit_transaction(trans, root); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3625 | } |
| 3626 | |
David Sterba | 3abdbd7 | 2014-06-04 18:10:45 +0200 | [diff] [blame] | 3627 | void close_ctree(struct btrfs_root *root) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3628 | { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 3629 | struct btrfs_fs_info *fs_info = root->fs_info; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3630 | int ret; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 3631 | |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 3632 | fs_info->closing = 1; |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 3633 | smp_mb(); |
| 3634 | |
Stefan Behrens | 803b2f5 | 2013-08-15 17:11:21 +0200 | [diff] [blame] | 3635 | /* wait for the uuid_scan task to finish */ |
| 3636 | down(&fs_info->uuid_tree_rescan_sem); |
| 3637 | /* avoid complains from lockdep et al., set sem back to initial state */ |
| 3638 | up(&fs_info->uuid_tree_rescan_sem); |
| 3639 | |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 3640 | /* pause restriper - we want to resume on mount */ |
Stefan Behrens | aa1b8cd | 2012-11-05 17:03:39 +0100 | [diff] [blame] | 3641 | btrfs_pause_balance(fs_info); |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 3642 | |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 3643 | btrfs_dev_replace_suspend_for_unmount(fs_info); |
| 3644 | |
Stefan Behrens | aa1b8cd | 2012-11-05 17:03:39 +0100 | [diff] [blame] | 3645 | btrfs_scrub_cancel(fs_info); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 3646 | |
| 3647 | /* wait for any defraggers to finish */ |
| 3648 | wait_event(fs_info->transaction_wait, |
| 3649 | (atomic_read(&fs_info->defrag_running) == 0)); |
| 3650 | |
| 3651 | /* clear out the rbtree of defraggable inodes */ |
Miao Xie | 26176e7 | 2012-11-26 09:26:20 +0000 | [diff] [blame] | 3652 | btrfs_cleanup_defrag_inodes(fs_info); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 3653 | |
Miao Xie | 21c7e75 | 2014-05-13 17:29:04 -0700 | [diff] [blame] | 3654 | cancel_work_sync(&fs_info->async_reclaim_work); |
| 3655 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3656 | if (!(fs_info->sb->s_flags & MS_RDONLY)) { |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3657 | ret = btrfs_commit_super(root); |
| 3658 | if (ret) |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 3659 | btrfs_err(root->fs_info, "commit super ret %d", ret); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3660 | } |
| 3661 | |
Miao Xie | 87533c4 | 2013-01-29 10:14:48 +0000 | [diff] [blame] | 3662 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) |
Stefan Behrens | 68ce968 | 2012-08-01 05:45:52 -0600 | [diff] [blame] | 3663 | btrfs_error_commit_super(root); |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 3664 | |
Al Viro | e3029d9 | 2011-11-17 00:56:18 -0500 | [diff] [blame] | 3665 | kthread_stop(fs_info->transaction_kthread); |
| 3666 | kthread_stop(fs_info->cleaner_kthread); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 3667 | |
Yan Zheng | f25784b | 2009-07-28 08:41:57 -0400 | [diff] [blame] | 3668 | fs_info->closing = 2; |
| 3669 | smp_mb(); |
| 3670 | |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 3671 | btrfs_free_qgroup_config(root->fs_info); |
| 3672 | |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 3673 | if (percpu_counter_sum(&fs_info->delalloc_bytes)) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 3674 | btrfs_info(root->fs_info, "at unmount delalloc count %lld", |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 3675 | percpu_counter_sum(&fs_info->delalloc_bytes)); |
Chris Mason | b0c68f8 | 2008-01-31 11:05:37 -0500 | [diff] [blame] | 3676 | } |
Yan | bcc63ab | 2008-07-30 16:29:20 -0400 | [diff] [blame] | 3677 | |
Jeff Mahoney | 5ac1d20 | 2013-11-01 13:06:58 -0400 | [diff] [blame] | 3678 | btrfs_sysfs_remove_one(fs_info); |
| 3679 | |
Josef Bacik | faa2dbf | 2014-05-07 17:06:09 -0400 | [diff] [blame] | 3680 | btrfs_free_fs_roots(fs_info); |
Chris Mason | d10c5f3 | 2007-12-17 20:14:04 -0500 | [diff] [blame] | 3681 | |
Liu Bo | 1a4319c | 2014-01-13 19:53:53 +0800 | [diff] [blame] | 3682 | btrfs_put_block_group_cache(fs_info); |
| 3683 | |
Josef Bacik | 2b1360d | 2013-10-07 15:14:44 -0400 | [diff] [blame] | 3684 | btrfs_free_block_groups(fs_info); |
| 3685 | |
Wang Shilong | de348ee | 2014-04-09 19:23:22 +0800 | [diff] [blame] | 3686 | /* |
| 3687 | * we must make sure there is not any read request to |
| 3688 | * submit after we stopping all workers. |
| 3689 | */ |
| 3690 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); |
Josef Bacik | 9619249 | 2013-10-16 13:53:28 -0400 | [diff] [blame] | 3691 | btrfs_stop_all_workers(fs_info); |
| 3692 | |
Josef Bacik | 47ab2a6 | 2014-09-18 11:20:02 -0400 | [diff] [blame] | 3693 | fs_info->open = 0; |
Josef Bacik | 13e6c37 | 2013-05-30 16:55:44 -0400 | [diff] [blame] | 3694 | free_root_pointers(fs_info, 1); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 3695 | |
Josef Bacik | 13e6c37 | 2013-05-30 16:55:44 -0400 | [diff] [blame] | 3696 | iput(fs_info->btree_inode); |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 3697 | |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 3698 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
| 3699 | if (btrfs_test_opt(root, CHECK_INTEGRITY)) |
| 3700 | btrfsic_unmount(root, fs_info->fs_devices); |
| 3701 | #endif |
| 3702 | |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 3703 | btrfs_close_devices(fs_info->fs_devices); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 3704 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
Chris Mason | b248a41 | 2008-04-14 09:48:18 -0400 | [diff] [blame] | 3705 | |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 3706 | percpu_counter_destroy(&fs_info->dirty_metadata_bytes); |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 3707 | percpu_counter_destroy(&fs_info->delalloc_bytes); |
Miao Xie | c404e0d | 2014-01-30 16:46:55 +0800 | [diff] [blame] | 3708 | percpu_counter_destroy(&fs_info->bio_counter); |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 3709 | bdi_destroy(&fs_info->bdi); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 3710 | cleanup_srcu_struct(&fs_info->subvol_srcu); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 3711 | |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 3712 | btrfs_free_stripe_hash_table(fs_info); |
| 3713 | |
Filipe David Borba Manana | 1cb048f | 2013-08-20 00:52:51 +0100 | [diff] [blame] | 3714 | btrfs_free_block_rsv(root, root->orphan_block_rsv); |
| 3715 | root->orphan_block_rsv = NULL; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3716 | } |
| 3717 | |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 3718 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, |
| 3719 | int atomic) |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 3720 | { |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3721 | int ret; |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 3722 | struct inode *btree_inode = buf->pages[0]->mapping->host; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3723 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 3724 | ret = extent_buffer_uptodate(buf); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3725 | if (!ret) |
| 3726 | return ret; |
| 3727 | |
| 3728 | ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 3729 | parent_transid, atomic); |
| 3730 | if (ret == -EAGAIN) |
| 3731 | return ret; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3732 | return !ret; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 3733 | } |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 3734 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 3735 | int btrfs_set_buffer_uptodate(struct extent_buffer *buf) |
| 3736 | { |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 3737 | return set_extent_buffer_uptodate(buf); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 3738 | } |
| 3739 | |
| 3740 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf) |
| 3741 | { |
Josef Bacik | 06ea65a | 2013-09-19 16:07:01 -0400 | [diff] [blame] | 3742 | struct btrfs_root *root; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 3743 | u64 transid = btrfs_header_generation(buf); |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 3744 | int was_dirty; |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 3745 | |
Josef Bacik | 06ea65a | 2013-09-19 16:07:01 -0400 | [diff] [blame] | 3746 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
| 3747 | /* |
| 3748 | * This is a fast path so only do this check if we have sanity tests |
| 3749 | * enabled. Normal people shouldn't be marking dummy buffers as dirty |
| 3750 | * outside of the sanity tests. |
| 3751 | */ |
| 3752 | if (unlikely(test_bit(EXTENT_BUFFER_DUMMY, &buf->bflags))) |
| 3753 | return; |
| 3754 | #endif |
| 3755 | root = BTRFS_I(buf->pages[0]->mapping->host)->root; |
Chris Mason | b9447ef | 2009-03-09 11:45:38 -0400 | [diff] [blame] | 3756 | btrfs_assert_tree_locked(buf); |
Julia Lawall | 31b1a2b | 2012-11-03 10:58:34 +0000 | [diff] [blame] | 3757 | if (transid != root->fs_info->generation) |
| 3758 | WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, " |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3759 | "found %llu running %llu\n", |
Geert Uytterhoeven | c1c9ff7 | 2013-08-20 13:20:07 +0200 | [diff] [blame] | 3760 | buf->start, transid, root->fs_info->generation); |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 3761 | was_dirty = set_extent_buffer_dirty(buf); |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 3762 | if (!was_dirty) |
| 3763 | __percpu_counter_add(&root->fs_info->dirty_metadata_bytes, |
| 3764 | buf->len, |
| 3765 | root->fs_info->dirty_metadata_batch); |
Filipe Manana | 1f21ef0 | 2014-04-09 15:37:06 +0100 | [diff] [blame] | 3766 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
| 3767 | if (btrfs_header_level(buf) == 0 && check_leaf(root, buf)) { |
| 3768 | btrfs_print_leaf(root, buf); |
| 3769 | ASSERT(0); |
| 3770 | } |
| 3771 | #endif |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3772 | } |
| 3773 | |
Liu Bo | b53d3f5 | 2012-11-14 14:34:34 +0000 | [diff] [blame] | 3774 | static void __btrfs_btree_balance_dirty(struct btrfs_root *root, |
| 3775 | int flush_delayed) |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 3776 | { |
Chris Mason | 188de64 | 2008-05-09 11:52:25 -0400 | [diff] [blame] | 3777 | /* |
| 3778 | * looks as though older kernels can get into trouble with |
| 3779 | * this code, they end up stuck in balance_dirty_pages forever |
| 3780 | */ |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 3781 | int ret; |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 3782 | |
Jens Axboe | 6933c02 | 2009-03-17 09:36:37 +0100 | [diff] [blame] | 3783 | if (current->flags & PF_MEMALLOC) |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 3784 | return; |
| 3785 | |
Liu Bo | b53d3f5 | 2012-11-14 14:34:34 +0000 | [diff] [blame] | 3786 | if (flush_delayed) |
| 3787 | btrfs_balance_delayed_items(root); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 3788 | |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 3789 | ret = percpu_counter_compare(&root->fs_info->dirty_metadata_bytes, |
| 3790 | BTRFS_DIRTY_METADATA_THRESH); |
| 3791 | if (ret > 0) { |
Namjae Jeon | d0e1d66 | 2012-12-11 16:00:21 -0800 | [diff] [blame] | 3792 | balance_dirty_pages_ratelimited( |
| 3793 | root->fs_info->btree_inode->i_mapping); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 3794 | } |
| 3795 | return; |
| 3796 | } |
| 3797 | |
Liu Bo | b53d3f5 | 2012-11-14 14:34:34 +0000 | [diff] [blame] | 3798 | void btrfs_btree_balance_dirty(struct btrfs_root *root) |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 3799 | { |
Liu Bo | b53d3f5 | 2012-11-14 14:34:34 +0000 | [diff] [blame] | 3800 | __btrfs_btree_balance_dirty(root, 1); |
| 3801 | } |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 3802 | |
Liu Bo | b53d3f5 | 2012-11-14 14:34:34 +0000 | [diff] [blame] | 3803 | void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root) |
| 3804 | { |
| 3805 | __btrfs_btree_balance_dirty(root, 0); |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 3806 | } |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 3807 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 3808 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 3809 | { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 3810 | struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 3811 | return btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 3812 | } |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 3813 | |
David Sterba | fcd1f065 | 2012-03-06 00:06:18 +0100 | [diff] [blame] | 3814 | static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3815 | int read_only) |
| 3816 | { |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 3817 | struct btrfs_super_block *sb = fs_info->super_copy; |
| 3818 | int ret = 0; |
| 3819 | |
| 3820 | if (sb->root_level > BTRFS_MAX_LEVEL) { |
| 3821 | printk(KERN_ERR "BTRFS: tree_root level too big: %d > %d\n", |
| 3822 | sb->root_level, BTRFS_MAX_LEVEL); |
| 3823 | ret = -EINVAL; |
| 3824 | } |
| 3825 | if (sb->chunk_root_level > BTRFS_MAX_LEVEL) { |
| 3826 | printk(KERN_ERR "BTRFS: chunk_root level too big: %d > %d\n", |
| 3827 | sb->chunk_root_level, BTRFS_MAX_LEVEL); |
| 3828 | ret = -EINVAL; |
| 3829 | } |
| 3830 | if (sb->log_root_level > BTRFS_MAX_LEVEL) { |
| 3831 | printk(KERN_ERR "BTRFS: log_root level too big: %d > %d\n", |
| 3832 | sb->log_root_level, BTRFS_MAX_LEVEL); |
| 3833 | ret = -EINVAL; |
| 3834 | } |
| 3835 | |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 3836 | /* |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 3837 | * The common minimum, we don't know if we can trust the nodesize/sectorsize |
| 3838 | * items yet, they'll be verified later. Issue just a warning. |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 3839 | */ |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 3840 | if (!IS_ALIGNED(sb->root, 4096)) |
| 3841 | printk(KERN_WARNING "BTRFS: tree_root block unaligned: %llu\n", |
| 3842 | sb->root); |
| 3843 | if (!IS_ALIGNED(sb->chunk_root, 4096)) |
| 3844 | printk(KERN_WARNING "BTRFS: tree_root block unaligned: %llu\n", |
| 3845 | sb->chunk_root); |
| 3846 | if (!IS_ALIGNED(sb->log_root, 4096)) |
| 3847 | printk(KERN_WARNING "BTRFS: tree_root block unaligned: %llu\n", |
| 3848 | sb->log_root); |
| 3849 | |
| 3850 | if (memcmp(fs_info->fsid, sb->dev_item.fsid, BTRFS_UUID_SIZE) != 0) { |
| 3851 | printk(KERN_ERR "BTRFS: dev_item UUID does not match fsid: %pU != %pU\n", |
| 3852 | fs_info->fsid, sb->dev_item.fsid); |
| 3853 | ret = -EINVAL; |
| 3854 | } |
| 3855 | |
| 3856 | /* |
| 3857 | * Hint to catch really bogus numbers, bitflips or so, more exact checks are |
| 3858 | * done later |
| 3859 | */ |
| 3860 | if (sb->num_devices > (1UL << 31)) |
| 3861 | printk(KERN_WARNING "BTRFS: suspicious number of devices: %llu\n", |
| 3862 | sb->num_devices); |
| 3863 | |
| 3864 | if (sb->bytenr != BTRFS_SUPER_INFO_OFFSET) { |
| 3865 | printk(KERN_ERR "BTRFS: super offset mismatch %llu != %u\n", |
| 3866 | sb->bytenr, BTRFS_SUPER_INFO_OFFSET); |
| 3867 | ret = -EINVAL; |
| 3868 | } |
| 3869 | |
| 3870 | /* |
| 3871 | * The generation is a global counter, we'll trust it more than the others |
| 3872 | * but it's still possible that it's the one that's wrong. |
| 3873 | */ |
| 3874 | if (sb->generation < sb->chunk_root_generation) |
| 3875 | printk(KERN_WARNING |
| 3876 | "BTRFS: suspicious: generation < chunk_root_generation: %llu < %llu\n", |
| 3877 | sb->generation, sb->chunk_root_generation); |
| 3878 | if (sb->generation < sb->cache_generation && sb->cache_generation != (u64)-1) |
| 3879 | printk(KERN_WARNING |
| 3880 | "BTRFS: suspicious: generation < cache_generation: %llu < %llu\n", |
| 3881 | sb->generation, sb->cache_generation); |
| 3882 | |
| 3883 | return ret; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3884 | } |
| 3885 | |
Eric Sandeen | 48a3b63 | 2013-04-25 20:41:01 +0000 | [diff] [blame] | 3886 | static void btrfs_error_commit_super(struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3887 | { |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3888 | mutex_lock(&root->fs_info->cleaner_mutex); |
| 3889 | btrfs_run_delayed_iputs(root); |
| 3890 | mutex_unlock(&root->fs_info->cleaner_mutex); |
| 3891 | |
| 3892 | down_write(&root->fs_info->cleanup_work_sem); |
| 3893 | up_write(&root->fs_info->cleanup_work_sem); |
| 3894 | |
| 3895 | /* cleanup FS via transaction */ |
| 3896 | btrfs_cleanup_transaction(root); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3897 | } |
| 3898 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 3899 | static void btrfs_destroy_ordered_extents(struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3900 | { |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3901 | struct btrfs_ordered_extent *ordered; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3902 | |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 3903 | spin_lock(&root->ordered_extent_lock); |
Josef Bacik | 779880e | 2013-01-31 14:30:08 -0500 | [diff] [blame] | 3904 | /* |
| 3905 | * This will just short circuit the ordered completion stuff which will |
| 3906 | * make sure the ordered extent gets properly cleaned up. |
| 3907 | */ |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 3908 | list_for_each_entry(ordered, &root->ordered_extents, |
Josef Bacik | 779880e | 2013-01-31 14:30:08 -0500 | [diff] [blame] | 3909 | root_extent_list) |
| 3910 | set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 3911 | spin_unlock(&root->ordered_extent_lock); |
| 3912 | } |
| 3913 | |
| 3914 | static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info) |
| 3915 | { |
| 3916 | struct btrfs_root *root; |
| 3917 | struct list_head splice; |
| 3918 | |
| 3919 | INIT_LIST_HEAD(&splice); |
| 3920 | |
| 3921 | spin_lock(&fs_info->ordered_root_lock); |
| 3922 | list_splice_init(&fs_info->ordered_roots, &splice); |
| 3923 | while (!list_empty(&splice)) { |
| 3924 | root = list_first_entry(&splice, struct btrfs_root, |
| 3925 | ordered_root); |
Josef Bacik | 1de2cfd | 2013-09-27 16:36:02 -0400 | [diff] [blame] | 3926 | list_move_tail(&root->ordered_root, |
| 3927 | &fs_info->ordered_roots); |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 3928 | |
Liu Bo | 2a85d9c | 2014-02-10 17:07:16 +0800 | [diff] [blame] | 3929 | spin_unlock(&fs_info->ordered_root_lock); |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 3930 | btrfs_destroy_ordered_extents(root); |
| 3931 | |
Liu Bo | 2a85d9c | 2014-02-10 17:07:16 +0800 | [diff] [blame] | 3932 | cond_resched(); |
| 3933 | spin_lock(&fs_info->ordered_root_lock); |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 3934 | } |
| 3935 | spin_unlock(&fs_info->ordered_root_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3936 | } |
| 3937 | |
Stefan Behrens | 35a3621 | 2013-08-14 18:12:25 +0200 | [diff] [blame] | 3938 | static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
| 3939 | struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3940 | { |
| 3941 | struct rb_node *node; |
| 3942 | struct btrfs_delayed_ref_root *delayed_refs; |
| 3943 | struct btrfs_delayed_ref_node *ref; |
| 3944 | int ret = 0; |
| 3945 | |
| 3946 | delayed_refs = &trans->delayed_refs; |
| 3947 | |
| 3948 | spin_lock(&delayed_refs->lock); |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 3949 | if (atomic_read(&delayed_refs->num_entries) == 0) { |
David Sterba | cfece4d | 2011-04-25 19:43:52 -0400 | [diff] [blame] | 3950 | spin_unlock(&delayed_refs->lock); |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 3951 | btrfs_info(root->fs_info, "delayed_refs has NO entry"); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3952 | return ret; |
| 3953 | } |
| 3954 | |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 3955 | while ((node = rb_first(&delayed_refs->href_root)) != NULL) { |
| 3956 | struct btrfs_delayed_ref_head *head; |
Josef Bacik | e78417d | 2013-06-03 16:42:36 -0400 | [diff] [blame] | 3957 | bool pin_bytes = false; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3958 | |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 3959 | head = rb_entry(node, struct btrfs_delayed_ref_head, |
| 3960 | href_node); |
| 3961 | if (!mutex_trylock(&head->mutex)) { |
| 3962 | atomic_inc(&head->node.refs); |
| 3963 | spin_unlock(&delayed_refs->lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3964 | |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 3965 | mutex_lock(&head->mutex); |
Josef Bacik | e78417d | 2013-06-03 16:42:36 -0400 | [diff] [blame] | 3966 | mutex_unlock(&head->mutex); |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 3967 | btrfs_put_delayed_ref(&head->node); |
| 3968 | spin_lock(&delayed_refs->lock); |
| 3969 | continue; |
Josef Bacik | e78417d | 2013-06-03 16:42:36 -0400 | [diff] [blame] | 3970 | } |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 3971 | spin_lock(&head->lock); |
| 3972 | while ((node = rb_first(&head->ref_root)) != NULL) { |
| 3973 | ref = rb_entry(node, struct btrfs_delayed_ref_node, |
| 3974 | rb_node); |
| 3975 | ref->in_tree = 0; |
| 3976 | rb_erase(&ref->rb_node, &head->ref_root); |
| 3977 | atomic_dec(&delayed_refs->num_entries); |
| 3978 | btrfs_put_delayed_ref(ref); |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 3979 | } |
| 3980 | if (head->must_insert_reserved) |
| 3981 | pin_bytes = true; |
| 3982 | btrfs_free_delayed_extent_op(head->extent_op); |
| 3983 | delayed_refs->num_heads--; |
| 3984 | if (head->processing == 0) |
| 3985 | delayed_refs->num_heads_ready--; |
| 3986 | atomic_dec(&delayed_refs->num_entries); |
| 3987 | head->node.in_tree = 0; |
| 3988 | rb_erase(&head->href_node, &delayed_refs->href_root); |
| 3989 | spin_unlock(&head->lock); |
| 3990 | spin_unlock(&delayed_refs->lock); |
| 3991 | mutex_unlock(&head->mutex); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3992 | |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 3993 | if (pin_bytes) |
| 3994 | btrfs_pin_extent(root, head->node.bytenr, |
| 3995 | head->node.num_bytes, 1); |
| 3996 | btrfs_put_delayed_ref(&head->node); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3997 | cond_resched(); |
| 3998 | spin_lock(&delayed_refs->lock); |
| 3999 | } |
| 4000 | |
| 4001 | spin_unlock(&delayed_refs->lock); |
| 4002 | |
| 4003 | return ret; |
| 4004 | } |
| 4005 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 4006 | static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4007 | { |
| 4008 | struct btrfs_inode *btrfs_inode; |
| 4009 | struct list_head splice; |
| 4010 | |
| 4011 | INIT_LIST_HEAD(&splice); |
| 4012 | |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 4013 | spin_lock(&root->delalloc_lock); |
| 4014 | list_splice_init(&root->delalloc_inodes, &splice); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4015 | |
| 4016 | while (!list_empty(&splice)) { |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 4017 | btrfs_inode = list_first_entry(&splice, struct btrfs_inode, |
| 4018 | delalloc_inodes); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4019 | |
| 4020 | list_del_init(&btrfs_inode->delalloc_inodes); |
Miao Xie | df0af1a | 2013-01-29 10:11:59 +0000 | [diff] [blame] | 4021 | clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, |
| 4022 | &btrfs_inode->runtime_flags); |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 4023 | spin_unlock(&root->delalloc_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4024 | |
| 4025 | btrfs_invalidate_inodes(btrfs_inode->root); |
Miao Xie | b216cbf | 2013-05-15 07:48:21 +0000 | [diff] [blame] | 4026 | |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 4027 | spin_lock(&root->delalloc_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4028 | } |
| 4029 | |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 4030 | spin_unlock(&root->delalloc_lock); |
| 4031 | } |
| 4032 | |
| 4033 | static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info) |
| 4034 | { |
| 4035 | struct btrfs_root *root; |
| 4036 | struct list_head splice; |
| 4037 | |
| 4038 | INIT_LIST_HEAD(&splice); |
| 4039 | |
| 4040 | spin_lock(&fs_info->delalloc_root_lock); |
| 4041 | list_splice_init(&fs_info->delalloc_roots, &splice); |
| 4042 | while (!list_empty(&splice)) { |
| 4043 | root = list_first_entry(&splice, struct btrfs_root, |
| 4044 | delalloc_root); |
| 4045 | list_del_init(&root->delalloc_root); |
| 4046 | root = btrfs_grab_fs_root(root); |
| 4047 | BUG_ON(!root); |
| 4048 | spin_unlock(&fs_info->delalloc_root_lock); |
| 4049 | |
| 4050 | btrfs_destroy_delalloc_inodes(root); |
| 4051 | btrfs_put_fs_root(root); |
| 4052 | |
| 4053 | spin_lock(&fs_info->delalloc_root_lock); |
| 4054 | } |
| 4055 | spin_unlock(&fs_info->delalloc_root_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4056 | } |
| 4057 | |
| 4058 | static int btrfs_destroy_marked_extents(struct btrfs_root *root, |
| 4059 | struct extent_io_tree *dirty_pages, |
| 4060 | int mark) |
| 4061 | { |
| 4062 | int ret; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4063 | struct extent_buffer *eb; |
| 4064 | u64 start = 0; |
| 4065 | u64 end; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4066 | |
| 4067 | while (1) { |
| 4068 | ret = find_first_extent_bit(dirty_pages, start, &start, &end, |
Josef Bacik | e613887 | 2012-09-27 17:07:30 -0400 | [diff] [blame] | 4069 | mark, NULL); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4070 | if (ret) |
| 4071 | break; |
| 4072 | |
| 4073 | clear_extent_bits(dirty_pages, start, end, mark, GFP_NOFS); |
| 4074 | while (start <= end) { |
David Sterba | 0308af4 | 2014-06-15 01:43:40 +0200 | [diff] [blame] | 4075 | eb = btrfs_find_tree_block(root, start); |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 4076 | start += root->nodesize; |
Josef Bacik | fd8b2b6 | 2013-04-24 16:41:19 -0400 | [diff] [blame] | 4077 | if (!eb) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4078 | continue; |
Josef Bacik | fd8b2b6 | 2013-04-24 16:41:19 -0400 | [diff] [blame] | 4079 | wait_on_extent_buffer_writeback(eb); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4080 | |
Josef Bacik | fd8b2b6 | 2013-04-24 16:41:19 -0400 | [diff] [blame] | 4081 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, |
| 4082 | &eb->bflags)) |
| 4083 | clear_extent_buffer_dirty(eb); |
| 4084 | free_extent_buffer_stale(eb); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4085 | } |
| 4086 | } |
| 4087 | |
| 4088 | return ret; |
| 4089 | } |
| 4090 | |
| 4091 | static int btrfs_destroy_pinned_extent(struct btrfs_root *root, |
| 4092 | struct extent_io_tree *pinned_extents) |
| 4093 | { |
| 4094 | struct extent_io_tree *unpin; |
| 4095 | u64 start; |
| 4096 | u64 end; |
| 4097 | int ret; |
Liu Bo | ed0eaa1 | 2012-06-14 02:23:21 -0600 | [diff] [blame] | 4098 | bool loop = true; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4099 | |
| 4100 | unpin = pinned_extents; |
Liu Bo | ed0eaa1 | 2012-06-14 02:23:21 -0600 | [diff] [blame] | 4101 | again: |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4102 | while (1) { |
| 4103 | ret = find_first_extent_bit(unpin, 0, &start, &end, |
Josef Bacik | e613887 | 2012-09-27 17:07:30 -0400 | [diff] [blame] | 4104 | EXTENT_DIRTY, NULL); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4105 | if (ret) |
| 4106 | break; |
| 4107 | |
| 4108 | /* opt_discard */ |
Li Dongyang | 5378e60 | 2011-03-24 10:24:27 +0000 | [diff] [blame] | 4109 | if (btrfs_test_opt(root, DISCARD)) |
| 4110 | ret = btrfs_error_discard_extent(root, start, |
| 4111 | end + 1 - start, |
| 4112 | NULL); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4113 | |
| 4114 | clear_extent_dirty(unpin, start, end, GFP_NOFS); |
| 4115 | btrfs_error_unpin_extent_range(root, start, end); |
| 4116 | cond_resched(); |
| 4117 | } |
| 4118 | |
Liu Bo | ed0eaa1 | 2012-06-14 02:23:21 -0600 | [diff] [blame] | 4119 | if (loop) { |
| 4120 | if (unpin == &root->fs_info->freed_extents[0]) |
| 4121 | unpin = &root->fs_info->freed_extents[1]; |
| 4122 | else |
| 4123 | unpin = &root->fs_info->freed_extents[0]; |
| 4124 | loop = false; |
| 4125 | goto again; |
| 4126 | } |
| 4127 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4128 | return 0; |
| 4129 | } |
| 4130 | |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 4131 | void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, |
| 4132 | struct btrfs_root *root) |
| 4133 | { |
| 4134 | btrfs_destroy_delayed_refs(cur_trans, root); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 4135 | |
Miao Xie | 4a9d8bd | 2013-05-17 03:53:43 +0000 | [diff] [blame] | 4136 | cur_trans->state = TRANS_STATE_COMMIT_START; |
Josef Bacik | d7096fc | 2012-05-31 15:49:57 -0400 | [diff] [blame] | 4137 | wake_up(&root->fs_info->transaction_blocked_wait); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 4138 | |
Miao Xie | 4a9d8bd | 2013-05-17 03:53:43 +0000 | [diff] [blame] | 4139 | cur_trans->state = TRANS_STATE_UNBLOCKED; |
Josef Bacik | d7096fc | 2012-05-31 15:49:57 -0400 | [diff] [blame] | 4140 | wake_up(&root->fs_info->transaction_wait); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 4141 | |
Miao Xie | 67cde34 | 2012-06-14 02:23:22 -0600 | [diff] [blame] | 4142 | btrfs_destroy_delayed_inodes(root); |
| 4143 | btrfs_assert_delayed_root_empty(root); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 4144 | |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 4145 | btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, |
| 4146 | EXTENT_DIRTY); |
Liu Bo | 6e841e3 | 2012-06-14 02:23:20 -0600 | [diff] [blame] | 4147 | btrfs_destroy_pinned_extent(root, |
| 4148 | root->fs_info->pinned_extents); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 4149 | |
Miao Xie | 4a9d8bd | 2013-05-17 03:53:43 +0000 | [diff] [blame] | 4150 | cur_trans->state =TRANS_STATE_COMPLETED; |
| 4151 | wake_up(&cur_trans->commit_wait); |
| 4152 | |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 4153 | /* |
| 4154 | memset(cur_trans, 0, sizeof(*cur_trans)); |
| 4155 | kmem_cache_free(btrfs_transaction_cachep, cur_trans); |
| 4156 | */ |
| 4157 | } |
| 4158 | |
Eric Sandeen | 48a3b63 | 2013-04-25 20:41:01 +0000 | [diff] [blame] | 4159 | static int btrfs_cleanup_transaction(struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4160 | { |
| 4161 | struct btrfs_transaction *t; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4162 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4163 | mutex_lock(&root->fs_info->transaction_kthread_mutex); |
| 4164 | |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 4165 | spin_lock(&root->fs_info->trans_lock); |
Josef Bacik | 724e231 | 2013-09-30 11:36:38 -0400 | [diff] [blame] | 4166 | while (!list_empty(&root->fs_info->trans_list)) { |
| 4167 | t = list_first_entry(&root->fs_info->trans_list, |
| 4168 | struct btrfs_transaction, list); |
| 4169 | if (t->state >= TRANS_STATE_COMMIT_START) { |
| 4170 | atomic_inc(&t->use_count); |
| 4171 | spin_unlock(&root->fs_info->trans_lock); |
| 4172 | btrfs_wait_for_commit(root, t->transid); |
| 4173 | btrfs_put_transaction(t); |
| 4174 | spin_lock(&root->fs_info->trans_lock); |
| 4175 | continue; |
| 4176 | } |
| 4177 | if (t == root->fs_info->running_transaction) { |
| 4178 | t->state = TRANS_STATE_COMMIT_DOING; |
| 4179 | spin_unlock(&root->fs_info->trans_lock); |
| 4180 | /* |
| 4181 | * We wait for 0 num_writers since we don't hold a trans |
| 4182 | * handle open currently for this transaction. |
| 4183 | */ |
| 4184 | wait_event(t->writer_wait, |
| 4185 | atomic_read(&t->num_writers) == 0); |
| 4186 | } else { |
| 4187 | spin_unlock(&root->fs_info->trans_lock); |
| 4188 | } |
| 4189 | btrfs_cleanup_one_transaction(t, root); |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 4190 | |
Josef Bacik | 724e231 | 2013-09-30 11:36:38 -0400 | [diff] [blame] | 4191 | spin_lock(&root->fs_info->trans_lock); |
| 4192 | if (t == root->fs_info->running_transaction) |
| 4193 | root->fs_info->running_transaction = NULL; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4194 | list_del_init(&t->list); |
Josef Bacik | 724e231 | 2013-09-30 11:36:38 -0400 | [diff] [blame] | 4195 | spin_unlock(&root->fs_info->trans_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4196 | |
Josef Bacik | 724e231 | 2013-09-30 11:36:38 -0400 | [diff] [blame] | 4197 | btrfs_put_transaction(t); |
| 4198 | trace_btrfs_transaction_commit(root); |
| 4199 | spin_lock(&root->fs_info->trans_lock); |
| 4200 | } |
| 4201 | spin_unlock(&root->fs_info->trans_lock); |
| 4202 | btrfs_destroy_all_ordered_extents(root->fs_info); |
| 4203 | btrfs_destroy_delayed_inodes(root); |
| 4204 | btrfs_assert_delayed_root_empty(root); |
| 4205 | btrfs_destroy_pinned_extent(root, root->fs_info->pinned_extents); |
| 4206 | btrfs_destroy_all_delalloc_inodes(root->fs_info); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4207 | mutex_unlock(&root->fs_info->transaction_kthread_mutex); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4208 | |
| 4209 | return 0; |
| 4210 | } |
| 4211 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 4212 | static struct extent_io_ops btree_extent_io_ops = { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 4213 | .readpage_end_io_hook = btree_readpage_end_io_hook, |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 4214 | .readpage_io_failed_hook = btree_io_failed_hook, |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 4215 | .submit_bio_hook = btree_submit_bio_hook, |
Chris Mason | 239b14b | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 4216 | /* note we're sharing with inode.c for the merge bio hook */ |
| 4217 | .merge_bio_hook = btrfs_merge_bio_hook, |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 4218 | }; |