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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 28 | #include <linux/slab.h> |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 29 | #include <linux/migrate.h> |
David Sterba | 7a36dde | 2011-05-06 15:33:15 +0200 | [diff] [blame] | 30 | #include <linux/ratelimit.h> |
Stefan Behrens | 6463fe5 | 2013-04-19 15:08:05 +0000 | [diff] [blame] | 31 | #include <linux/uuid.h> |
Stefan Behrens | 803b2f5 | 2013-08-15 17:11:21 +0200 | [diff] [blame] | 32 | #include <linux/semaphore.h> |
David Sterba | 7e75bf3 | 2011-03-18 22:56:43 +0000 | [diff] [blame] | 33 | #include <asm/unaligned.h> |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 34 | #include "ctree.h" |
| 35 | #include "disk-io.h" |
Filipe David Borba Manana | 0b947af | 2014-01-29 21:06:04 +0000 | [diff] [blame] | 36 | #include "hash.h" |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 37 | #include "transaction.h" |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 38 | #include "btrfs_inode.h" |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 39 | #include "volumes.h" |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 40 | #include "print-tree.h" |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 41 | #include "locking.h" |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 42 | #include "tree-log.h" |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 43 | #include "free-space-cache.h" |
Omar Sandoval | 70f6d82 | 2015-09-29 20:50:38 -0700 | [diff] [blame] | 44 | #include "free-space-tree.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" |
Anand Jain | ebb8765 | 2016-03-10 17:26:59 +0800 | [diff] [blame] | 52 | #include "compression.h" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 53 | |
Josef Bacik | de0022b | 2012-09-25 14:25:58 -0400 | [diff] [blame] | 54 | #ifdef CONFIG_X86 |
| 55 | #include <asm/cpufeature.h> |
| 56 | #endif |
| 57 | |
Qu Wenruo | 319e4d0 | 2015-12-15 09:14:36 +0800 | [diff] [blame] | 58 | #define BTRFS_SUPER_FLAG_SUPP (BTRFS_HEADER_FLAG_WRITTEN |\ |
| 59 | BTRFS_HEADER_FLAG_RELOC |\ |
| 60 | BTRFS_SUPER_FLAG_ERROR |\ |
| 61 | BTRFS_SUPER_FLAG_SEEDING |\ |
| 62 | BTRFS_SUPER_FLAG_METADUMP) |
| 63 | |
David Sterba | e8c9f18 | 2015-01-02 18:23:10 +0100 | [diff] [blame] | 64 | static const struct extent_io_ops btree_extent_io_ops; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 65 | static void end_workqueue_fn(struct btrfs_work *work); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 66 | static void free_fs_root(struct btrfs_root *root); |
David Sterba | fcd1f065 | 2012-03-06 00:06:18 +0100 | [diff] [blame] | 67 | static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 68 | int read_only); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 69 | static void btrfs_destroy_ordered_extents(struct btrfs_root *root); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 70 | static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
| 71 | struct btrfs_root *root); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 72 | static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 73 | static int btrfs_destroy_marked_extents(struct btrfs_root *root, |
| 74 | struct extent_io_tree *dirty_pages, |
| 75 | int mark); |
| 76 | static int btrfs_destroy_pinned_extent(struct btrfs_root *root, |
| 77 | struct extent_io_tree *pinned_extents); |
Eric Sandeen | 48a3b63 | 2013-04-25 20:41:01 +0000 | [diff] [blame] | 78 | static int btrfs_cleanup_transaction(struct btrfs_root *root); |
| 79 | static void btrfs_error_commit_super(struct btrfs_root *root); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 80 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 81 | /* |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 82 | * btrfs_end_io_wq structs are used to do processing in task context when an IO |
| 83 | * 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] | 84 | * by writes to insert metadata for new file extents after IO is complete. |
| 85 | */ |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 86 | struct btrfs_end_io_wq { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 87 | struct bio *bio; |
| 88 | bio_end_io_t *end_io; |
| 89 | void *private; |
| 90 | struct btrfs_fs_info *info; |
| 91 | int error; |
David Sterba | bfebd8b | 2014-07-30 00:25:45 +0200 | [diff] [blame] | 92 | enum btrfs_wq_endio_type metadata; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 93 | struct list_head list; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 94 | struct btrfs_work work; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 95 | }; |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 96 | |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 97 | static struct kmem_cache *btrfs_end_io_wq_cache; |
| 98 | |
| 99 | int __init btrfs_end_io_wq_init(void) |
| 100 | { |
| 101 | btrfs_end_io_wq_cache = kmem_cache_create("btrfs_end_io_wq", |
| 102 | sizeof(struct btrfs_end_io_wq), |
| 103 | 0, |
Nikolay Borisov | fba4b69 | 2016-06-23 21:17:08 +0300 | [diff] [blame] | 104 | SLAB_MEM_SPREAD, |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 105 | NULL); |
| 106 | if (!btrfs_end_io_wq_cache) |
| 107 | return -ENOMEM; |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | void btrfs_end_io_wq_exit(void) |
| 112 | { |
Kinglong Mee | 5598e90 | 2016-01-29 21:36:35 +0800 | [diff] [blame] | 113 | kmem_cache_destroy(btrfs_end_io_wq_cache); |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 114 | } |
| 115 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 116 | /* |
| 117 | * async submit bios are used to offload expensive checksumming |
| 118 | * onto the worker threads. They checksum file and metadata bios |
| 119 | * just before they are sent down the IO stack. |
| 120 | */ |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 121 | struct async_submit_bio { |
| 122 | struct inode *inode; |
| 123 | struct bio *bio; |
| 124 | struct list_head list; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 125 | extent_submit_bio_hook_t *submit_bio_start; |
| 126 | extent_submit_bio_hook_t *submit_bio_done; |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 127 | int rw; |
| 128 | int mirror_num; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 129 | unsigned long bio_flags; |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 130 | /* |
| 131 | * bio_offset is optional, can be used if the pages in the bio |
| 132 | * can't tell us where in the file the bio should go |
| 133 | */ |
| 134 | u64 bio_offset; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 135 | struct btrfs_work work; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 136 | int error; |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 137 | }; |
| 138 | |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 139 | /* |
| 140 | * Lockdep class keys for extent_buffer->lock's in this root. For a given |
| 141 | * eb, the lockdep key is determined by the btrfs_root it belongs to and |
| 142 | * the level the eb occupies in the tree. |
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 | * Different roots are used for different purposes and may nest inside each |
| 145 | * other and they require separate keysets. As lockdep keys should be |
| 146 | * static, assign keysets according to the purpose of the root as indicated |
| 147 | * by btrfs_root->objectid. This ensures that all special purpose roots |
| 148 | * have separate keysets. |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 149 | * |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 150 | * Lock-nesting across peer nodes is always done with the immediate parent |
| 151 | * node locked thus preventing deadlock. As lockdep doesn't know this, use |
| 152 | * subclass to avoid triggering lockdep warning in such cases. |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 153 | * |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 154 | * The key is set by the readpage_end_io_hook after the buffer has passed |
| 155 | * csum validation but before the pages are unlocked. It is also set by |
| 156 | * btrfs_init_new_buffer on freshly allocated blocks. |
| 157 | * |
| 158 | * We also add a check to make sure the highest level of the tree is the |
| 159 | * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code |
| 160 | * needs update as well. |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 161 | */ |
| 162 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 163 | # if BTRFS_MAX_LEVEL != 8 |
| 164 | # error |
| 165 | # endif |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 166 | |
| 167 | static struct btrfs_lockdep_keyset { |
| 168 | u64 id; /* root objectid */ |
| 169 | const char *name_stem; /* lock name stem */ |
| 170 | char names[BTRFS_MAX_LEVEL + 1][20]; |
| 171 | struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; |
| 172 | } btrfs_lockdep_keysets[] = { |
| 173 | { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, |
| 174 | { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, |
| 175 | { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, |
| 176 | { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, |
| 177 | { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, |
| 178 | { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, |
David Sterba | 60b6297 | 2013-04-30 17:29:29 +0000 | [diff] [blame] | 179 | { .id = BTRFS_QUOTA_TREE_OBJECTID, .name_stem = "quota" }, |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 180 | { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, |
| 181 | { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, |
| 182 | { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, |
David Sterba | 13fd8da | 2013-09-03 18:28:57 +0200 | [diff] [blame] | 183 | { .id = BTRFS_UUID_TREE_OBJECTID, .name_stem = "uuid" }, |
David Sterba | 6b20e0a | 2016-01-25 16:30:22 +0100 | [diff] [blame] | 184 | { .id = BTRFS_FREE_SPACE_TREE_OBJECTID, .name_stem = "free-space" }, |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 185 | { .id = 0, .name_stem = "tree" }, |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 186 | }; |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 187 | |
| 188 | void __init btrfs_init_lockdep(void) |
| 189 | { |
| 190 | int i, j; |
| 191 | |
| 192 | /* initialize lockdep class names */ |
| 193 | for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { |
| 194 | struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; |
| 195 | |
| 196 | for (j = 0; j < ARRAY_SIZE(ks->names); j++) |
| 197 | snprintf(ks->names[j], sizeof(ks->names[j]), |
| 198 | "btrfs-%s-%02d", ks->name_stem, j); |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, |
| 203 | int level) |
| 204 | { |
| 205 | struct btrfs_lockdep_keyset *ks; |
| 206 | |
| 207 | BUG_ON(level >= ARRAY_SIZE(ks->keys)); |
| 208 | |
| 209 | /* find the matching keyset, id 0 is the default entry */ |
| 210 | for (ks = btrfs_lockdep_keysets; ks->id; ks++) |
| 211 | if (ks->id == objectid) |
| 212 | break; |
| 213 | |
| 214 | lockdep_set_class_and_name(&eb->lock, |
| 215 | &ks->keys[level], ks->names[level]); |
| 216 | } |
| 217 | |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 218 | #endif |
| 219 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 220 | /* |
| 221 | * extents on the btree inode are pretty simple, there's one extent |
| 222 | * that covers the entire device |
| 223 | */ |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 224 | static struct extent_map *btree_get_extent(struct inode *inode, |
David Sterba | 306e16c | 2011-04-19 14:29:38 +0200 | [diff] [blame] | 225 | struct page *page, size_t pg_offset, u64 start, u64 len, |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 226 | int create) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 227 | { |
| 228 | struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; |
| 229 | struct extent_map *em; |
| 230 | int ret; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 231 | |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 232 | read_lock(&em_tree->lock); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 233 | em = lookup_extent_mapping(em_tree, start, len); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 234 | if (em) { |
| 235 | em->bdev = |
| 236 | BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 237 | read_unlock(&em_tree->lock); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 238 | goto out; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 239 | } |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 240 | read_unlock(&em_tree->lock); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 241 | |
David Sterba | 172ddd6 | 2011-04-21 00:48:27 +0200 | [diff] [blame] | 242 | em = alloc_extent_map(); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 243 | if (!em) { |
| 244 | em = ERR_PTR(-ENOMEM); |
| 245 | goto out; |
| 246 | } |
| 247 | em->start = 0; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 248 | em->len = (u64)-1; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 249 | em->block_len = (u64)-1; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 250 | em->block_start = 0; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 251 | em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 252 | |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 253 | write_lock(&em_tree->lock); |
Josef Bacik | 09a2a8f9 | 2013-04-05 16:51:15 -0400 | [diff] [blame] | 254 | ret = add_extent_mapping(em_tree, em, 0); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 255 | if (ret == -EEXIST) { |
| 256 | free_extent_map(em); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 257 | em = lookup_extent_mapping(em_tree, start, len); |
Tsutomu Itoh | b4f359a | 2012-09-13 03:32:54 -0600 | [diff] [blame] | 258 | if (!em) |
Tsutomu Itoh | 0433f20 | 2012-09-13 03:32:32 -0600 | [diff] [blame] | 259 | em = ERR_PTR(-EIO); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 260 | } else if (ret) { |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 261 | free_extent_map(em); |
Tsutomu Itoh | 0433f20 | 2012-09-13 03:32:32 -0600 | [diff] [blame] | 262 | em = ERR_PTR(ret); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 263 | } |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 264 | write_unlock(&em_tree->lock); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 265 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 266 | out: |
| 267 | return em; |
| 268 | } |
| 269 | |
Liu Bo | b049668 | 2013-03-14 14:57:45 +0000 | [diff] [blame] | 270 | u32 btrfs_csum_data(char *data, u32 seed, size_t len) |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 271 | { |
Filipe David Borba Manana | 0b947af | 2014-01-29 21:06:04 +0000 | [diff] [blame] | 272 | return btrfs_crc32c(seed, data, len); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | void btrfs_csum_final(u32 crc, char *result) |
| 276 | { |
David Sterba | 7e75bf3 | 2011-03-18 22:56:43 +0000 | [diff] [blame] | 277 | put_unaligned_le32(~crc, result); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 278 | } |
| 279 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 280 | /* |
| 281 | * compute the csum for a btree block, and either verify it or write it |
| 282 | * into the csum field of the block. |
| 283 | */ |
Daniel Dressler | 01d5847 | 2014-11-21 17:15:07 +0900 | [diff] [blame] | 284 | static int csum_tree_block(struct btrfs_fs_info *fs_info, |
| 285 | struct extent_buffer *buf, |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 286 | int verify) |
| 287 | { |
Daniel Dressler | 01d5847 | 2014-11-21 17:15:07 +0900 | [diff] [blame] | 288 | u16 csum_size = btrfs_super_csum_size(fs_info->super_copy); |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 289 | char *result = NULL; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 290 | unsigned long len; |
| 291 | unsigned long cur_len; |
| 292 | unsigned long offset = BTRFS_CSUM_SIZE; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 293 | char *kaddr; |
| 294 | unsigned long map_start; |
| 295 | unsigned long map_len; |
| 296 | int err; |
| 297 | u32 crc = ~(u32)0; |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 298 | unsigned long inline_result; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 299 | |
| 300 | len = buf->len - offset; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 301 | while (len > 0) { |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 302 | err = map_private_extent_buffer(buf, offset, 32, |
Chris Mason | a659171 | 2011-07-19 12:04:14 -0400 | [diff] [blame] | 303 | &kaddr, &map_start, &map_len); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 304 | if (err) |
Alex Lyakas | 8bd98f0 | 2016-03-10 13:09:46 +0200 | [diff] [blame] | 305 | return err; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 306 | cur_len = min(len, map_len - (offset - map_start)); |
Liu Bo | b049668 | 2013-03-14 14:57:45 +0000 | [diff] [blame] | 307 | crc = btrfs_csum_data(kaddr + offset - map_start, |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 308 | crc, cur_len); |
| 309 | len -= cur_len; |
| 310 | offset += cur_len; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 311 | } |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 312 | if (csum_size > sizeof(inline_result)) { |
David Sterba | 31e818f | 2015-02-20 18:00:26 +0100 | [diff] [blame] | 313 | result = kzalloc(csum_size, GFP_NOFS); |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 314 | if (!result) |
Alex Lyakas | 8bd98f0 | 2016-03-10 13:09:46 +0200 | [diff] [blame] | 315 | return -ENOMEM; |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 316 | } else { |
| 317 | result = (char *)&inline_result; |
| 318 | } |
| 319 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 320 | btrfs_csum_final(crc, result); |
| 321 | |
| 322 | if (verify) { |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 323 | if (memcmp_extent_buffer(buf, result, 0, csum_size)) { |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 324 | u32 val; |
| 325 | u32 found = 0; |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 326 | memcpy(&found, result, csum_size); |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 327 | |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 328 | read_extent_buffer(buf, &val, 0, csum_size); |
David Sterba | 9464732 | 2015-10-08 11:01:36 +0200 | [diff] [blame] | 329 | btrfs_warn_rl(fs_info, |
| 330 | "%s checksum verify failed on %llu wanted %X found %X " |
| 331 | "level %d", |
Daniel Dressler | 01d5847 | 2014-11-21 17:15:07 +0900 | [diff] [blame] | 332 | fs_info->sb->s_id, buf->start, |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 333 | val, found, btrfs_header_level(buf)); |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 334 | if (result != (char *)&inline_result) |
| 335 | kfree(result); |
Alex Lyakas | 8bd98f0 | 2016-03-10 13:09:46 +0200 | [diff] [blame] | 336 | return -EUCLEAN; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 337 | } |
| 338 | } else { |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 339 | write_extent_buffer(buf, result, 0, csum_size); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 340 | } |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 341 | if (result != (char *)&inline_result) |
| 342 | kfree(result); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 343 | return 0; |
| 344 | } |
| 345 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 346 | /* |
| 347 | * we can't consider a given block up to date unless the transid of the |
| 348 | * block matches the transid in the parent node's pointer. This is how we |
| 349 | * detect blocks that either didn't get written at all or got written |
| 350 | * in the wrong place. |
| 351 | */ |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 352 | static int verify_parent_transid(struct extent_io_tree *io_tree, |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 353 | struct extent_buffer *eb, u64 parent_transid, |
| 354 | int atomic) |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 355 | { |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 356 | struct extent_state *cached_state = NULL; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 357 | int ret; |
David Sterba | 2755a0d | 2014-07-31 00:43:18 +0200 | [diff] [blame] | 358 | bool need_lock = (current->journal_info == BTRFS_SEND_TRANS_STUB); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 359 | |
| 360 | if (!parent_transid || btrfs_header_generation(eb) == parent_transid) |
| 361 | return 0; |
| 362 | |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 363 | if (atomic) |
| 364 | return -EAGAIN; |
| 365 | |
Josef Bacik | a26e8c9 | 2014-03-28 17:07:27 -0400 | [diff] [blame] | 366 | if (need_lock) { |
| 367 | btrfs_tree_read_lock(eb); |
| 368 | btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK); |
| 369 | } |
| 370 | |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 371 | lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, |
David Sterba | ff13db4 | 2015-12-03 14:30:40 +0100 | [diff] [blame] | 372 | &cached_state); |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 373 | if (extent_buffer_uptodate(eb) && |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 374 | btrfs_header_generation(eb) == parent_transid) { |
| 375 | ret = 0; |
| 376 | goto out; |
| 377 | } |
David Sterba | 9464732 | 2015-10-08 11:01:36 +0200 | [diff] [blame] | 378 | btrfs_err_rl(eb->fs_info, |
| 379 | "parent transid verify failed on %llu wanted %llu found %llu", |
| 380 | eb->start, |
Wang Shilong | 29549ae | 2014-07-04 17:59:06 +0800 | [diff] [blame] | 381 | parent_transid, btrfs_header_generation(eb)); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 382 | ret = 1; |
Josef Bacik | a26e8c9 | 2014-03-28 17:07:27 -0400 | [diff] [blame] | 383 | |
| 384 | /* |
| 385 | * Things reading via commit roots that don't have normal protection, |
| 386 | * like send, can have a really old block in cache that may point at a |
Nicholas D Steeves | 0132761 | 2016-05-19 21:18:45 -0400 | [diff] [blame] | 387 | * block that has been freed and re-allocated. So don't clear uptodate |
Josef Bacik | a26e8c9 | 2014-03-28 17:07:27 -0400 | [diff] [blame] | 388 | * if we find an eb that is under IO (dirty/writeback) because we could |
| 389 | * end up reading in the stale data and then writing it back out and |
| 390 | * making everybody very sad. |
| 391 | */ |
| 392 | if (!extent_buffer_under_io(eb)) |
| 393 | clear_extent_buffer_uptodate(eb); |
Chris Mason | 33958dc | 2008-07-30 10:29:12 -0400 | [diff] [blame] | 394 | out: |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 395 | unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, |
| 396 | &cached_state, GFP_NOFS); |
Josef Bacik | 472b909 | 2014-06-25 13:45:41 -0700 | [diff] [blame] | 397 | if (need_lock) |
| 398 | btrfs_tree_read_unlock_blocking(eb); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 399 | return ret; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 400 | } |
| 401 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 402 | /* |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 403 | * Return 0 if the superblock checksum type matches the checksum value of that |
| 404 | * algorithm. Pass the raw disk superblock data. |
| 405 | */ |
| 406 | static int btrfs_check_super_csum(char *raw_disk_sb) |
| 407 | { |
| 408 | struct btrfs_super_block *disk_sb = |
| 409 | (struct btrfs_super_block *)raw_disk_sb; |
| 410 | u16 csum_type = btrfs_super_csum_type(disk_sb); |
| 411 | int ret = 0; |
| 412 | |
| 413 | if (csum_type == BTRFS_CSUM_TYPE_CRC32) { |
| 414 | u32 crc = ~(u32)0; |
| 415 | const int csum_size = sizeof(crc); |
| 416 | char result[csum_size]; |
| 417 | |
| 418 | /* |
| 419 | * The super_block structure does not span the whole |
| 420 | * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space |
Nicholas D Steeves | 0132761 | 2016-05-19 21:18:45 -0400 | [diff] [blame] | 421 | * is filled with zeros and is included in the checksum. |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 422 | */ |
| 423 | crc = btrfs_csum_data(raw_disk_sb + BTRFS_CSUM_SIZE, |
| 424 | crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); |
| 425 | btrfs_csum_final(crc, result); |
| 426 | |
| 427 | if (memcmp(raw_disk_sb, result, csum_size)) |
| 428 | ret = 1; |
| 429 | } |
| 430 | |
| 431 | if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 432 | printk(KERN_ERR "BTRFS: unsupported checksum algorithm %u\n", |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 433 | csum_type); |
| 434 | ret = 1; |
| 435 | } |
| 436 | |
| 437 | return ret; |
| 438 | } |
| 439 | |
| 440 | /* |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 441 | * helper to read a given tree block, doing retries as required when |
| 442 | * the checksums don't match and we have alternate mirrors to try. |
| 443 | */ |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 444 | static int btree_read_extent_buffer_pages(struct btrfs_root *root, |
| 445 | struct extent_buffer *eb, |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 446 | u64 start, u64 parent_transid) |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 447 | { |
| 448 | struct extent_io_tree *io_tree; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 449 | int failed = 0; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 450 | int ret; |
| 451 | int num_copies = 0; |
| 452 | int mirror_num = 0; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 453 | int failed_mirror = 0; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 454 | |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 455 | clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 456 | io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; |
| 457 | while (1) { |
Arne Jansen | bb82ab8 | 2011-06-10 14:06:53 +0200 | [diff] [blame] | 458 | ret = read_extent_buffer_pages(io_tree, eb, start, |
| 459 | WAIT_COMPLETE, |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 460 | btree_get_extent, mirror_num); |
Stefan Behrens | 256dd1b | 2012-08-10 08:58:21 -0600 | [diff] [blame] | 461 | if (!ret) { |
| 462 | if (!verify_parent_transid(io_tree, eb, |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 463 | parent_transid, 0)) |
Stefan Behrens | 256dd1b | 2012-08-10 08:58:21 -0600 | [diff] [blame] | 464 | break; |
| 465 | else |
| 466 | ret = -EIO; |
| 467 | } |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 468 | |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 469 | /* |
| 470 | * This buffer's crc is fine, but its contents are corrupted, so |
| 471 | * there is no reason to read the other copies, they won't be |
| 472 | * any less wrong. |
| 473 | */ |
| 474 | if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 475 | break; |
| 476 | |
Stefan Behrens | 5d96405 | 2012-11-05 14:59:07 +0100 | [diff] [blame] | 477 | num_copies = btrfs_num_copies(root->fs_info, |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 478 | eb->start, eb->len); |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 479 | if (num_copies == 1) |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 480 | break; |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 481 | |
Josef Bacik | 5cf1ab5 | 2012-04-16 09:42:26 -0400 | [diff] [blame] | 482 | if (!failed_mirror) { |
| 483 | failed = 1; |
| 484 | failed_mirror = eb->read_mirror; |
| 485 | } |
| 486 | |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 487 | mirror_num++; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 488 | if (mirror_num == failed_mirror) |
| 489 | mirror_num++; |
| 490 | |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 491 | if (mirror_num > num_copies) |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 492 | break; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 493 | } |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 494 | |
Stefan Behrens | c090158 | 2012-07-10 07:30:17 -0600 | [diff] [blame] | 495 | if (failed && !ret && failed_mirror) |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 496 | repair_eb_io_failure(root, eb, failed_mirror); |
| 497 | |
| 498 | return ret; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 499 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 500 | |
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 | * checksum a dirty tree block before IO. This has extra checks to make sure |
| 503 | * 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] | 504 | */ |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 505 | |
Daniel Dressler | 01d5847 | 2014-11-21 17:15:07 +0900 | [diff] [blame] | 506 | static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page) |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 507 | { |
Miao Xie | 4eee4fa | 2012-12-21 09:17:45 +0000 | [diff] [blame] | 508 | u64 start = page_offset(page); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 509 | u64 found_start; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 510 | struct extent_buffer *eb; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 511 | |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 512 | eb = (struct extent_buffer *)page->private; |
| 513 | if (page != eb->pages[0]) |
| 514 | return 0; |
Alex Lyakas | 0f80553 | 2016-03-10 13:10:15 +0200 | [diff] [blame] | 515 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 516 | found_start = btrfs_header_bytenr(eb); |
Alex Lyakas | 0f80553 | 2016-03-10 13:10:15 +0200 | [diff] [blame] | 517 | /* |
| 518 | * Please do not consolidate these warnings into a single if. |
| 519 | * It is useful to know what went wrong. |
| 520 | */ |
| 521 | if (WARN_ON(found_start != start)) |
| 522 | return -EUCLEAN; |
| 523 | if (WARN_ON(!PageUptodate(page))) |
| 524 | return -EUCLEAN; |
| 525 | |
| 526 | ASSERT(memcmp_extent_buffer(eb, fs_info->fsid, |
| 527 | btrfs_header_fsid(), BTRFS_FSID_SIZE) == 0); |
| 528 | |
Alex Lyakas | 8bd98f0 | 2016-03-10 13:09:46 +0200 | [diff] [blame] | 529 | return csum_tree_block(fs_info, eb, 0); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 530 | } |
| 531 | |
Daniel Dressler | 01d5847 | 2014-11-21 17:15:07 +0900 | [diff] [blame] | 532 | static int check_tree_block_fsid(struct btrfs_fs_info *fs_info, |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 533 | struct extent_buffer *eb) |
| 534 | { |
Daniel Dressler | 01d5847 | 2014-11-21 17:15:07 +0900 | [diff] [blame] | 535 | struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 536 | u8 fsid[BTRFS_UUID_SIZE]; |
| 537 | int ret = 1; |
| 538 | |
Ross Kirk | 0a4e558 | 2013-09-24 10:12:38 +0100 | [diff] [blame] | 539 | read_extent_buffer(eb, fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 540 | while (fs_devices) { |
| 541 | if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { |
| 542 | ret = 0; |
| 543 | break; |
| 544 | } |
| 545 | fs_devices = fs_devices->seed; |
| 546 | } |
| 547 | return ret; |
| 548 | } |
| 549 | |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 550 | #define CORRUPT(reason, eb, root, slot) \ |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 551 | btrfs_crit(root->fs_info, "corrupt leaf, %s: block=%llu," \ |
| 552 | "root=%llu, slot=%d", reason, \ |
Geert Uytterhoeven | c1c9ff7 | 2013-08-20 13:20:07 +0200 | [diff] [blame] | 553 | btrfs_header_bytenr(eb), root->objectid, slot) |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 554 | |
| 555 | static noinline int check_leaf(struct btrfs_root *root, |
| 556 | struct extent_buffer *leaf) |
| 557 | { |
| 558 | struct btrfs_key key; |
| 559 | struct btrfs_key leaf_key; |
| 560 | u32 nritems = btrfs_header_nritems(leaf); |
| 561 | int slot; |
| 562 | |
| 563 | if (nritems == 0) |
| 564 | return 0; |
| 565 | |
| 566 | /* Check the 0 item */ |
| 567 | if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != |
| 568 | BTRFS_LEAF_DATA_SIZE(root)) { |
| 569 | CORRUPT("invalid item offset size pair", leaf, root, 0); |
| 570 | return -EIO; |
| 571 | } |
| 572 | |
| 573 | /* |
| 574 | * Check to make sure each items keys are in the correct order and their |
| 575 | * offsets make sense. We only have to loop through nritems-1 because |
| 576 | * we check the current slot against the next slot, which verifies the |
| 577 | * next slot's offset+size makes sense and that the current's slot |
| 578 | * offset is correct. |
| 579 | */ |
| 580 | for (slot = 0; slot < nritems - 1; slot++) { |
| 581 | btrfs_item_key_to_cpu(leaf, &leaf_key, slot); |
| 582 | btrfs_item_key_to_cpu(leaf, &key, slot + 1); |
| 583 | |
| 584 | /* Make sure the keys are in the right order */ |
| 585 | if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { |
| 586 | CORRUPT("bad key order", leaf, root, slot); |
| 587 | return -EIO; |
| 588 | } |
| 589 | |
| 590 | /* |
| 591 | * Make sure the offset and ends are right, remember that the |
| 592 | * item data starts at the end of the leaf and grows towards the |
| 593 | * front. |
| 594 | */ |
| 595 | if (btrfs_item_offset_nr(leaf, slot) != |
| 596 | btrfs_item_end_nr(leaf, slot + 1)) { |
| 597 | CORRUPT("slot offset bad", leaf, root, slot); |
| 598 | return -EIO; |
| 599 | } |
| 600 | |
| 601 | /* |
| 602 | * Check to make sure that we don't point outside of the leaf, |
Nicholas D Steeves | 0132761 | 2016-05-19 21:18:45 -0400 | [diff] [blame] | 603 | * just in case all the items are consistent to each other, but |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 604 | * all point outside of the leaf. |
| 605 | */ |
| 606 | if (btrfs_item_end_nr(leaf, slot) > |
| 607 | BTRFS_LEAF_DATA_SIZE(root)) { |
| 608 | CORRUPT("slot end outside of leaf", leaf, root, slot); |
| 609 | return -EIO; |
| 610 | } |
| 611 | } |
| 612 | |
| 613 | return 0; |
| 614 | } |
| 615 | |
Miao Xie | facc8a22 | 2013-07-25 19:22:34 +0800 | [diff] [blame] | 616 | static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio, |
| 617 | u64 phy_offset, struct page *page, |
| 618 | u64 start, u64 end, int mirror) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 619 | { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 620 | u64 found_start; |
| 621 | int found_level; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 622 | struct extent_buffer *eb; |
| 623 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
Zhao Lei | 02873e4 | 2015-12-31 22:46:45 +0800 | [diff] [blame] | 624 | struct btrfs_fs_info *fs_info = root->fs_info; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 625 | int ret = 0; |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 626 | int reads_done; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 627 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 628 | if (!page->private) |
| 629 | goto out; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 630 | |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 631 | eb = (struct extent_buffer *)page->private; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 632 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 633 | /* the pending IO might have been the only thing that kept this buffer |
| 634 | * in memory. Make sure we have a ref for all this other checks |
| 635 | */ |
| 636 | extent_buffer_get(eb); |
| 637 | |
| 638 | reads_done = atomic_dec_and_test(&eb->io_pages); |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 639 | if (!reads_done) |
| 640 | goto err; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 641 | |
Josef Bacik | 5cf1ab5 | 2012-04-16 09:42:26 -0400 | [diff] [blame] | 642 | eb->read_mirror = mirror; |
Filipe Manana | 656f30d | 2014-09-26 12:25:56 +0100 | [diff] [blame] | 643 | if (test_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags)) { |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 644 | ret = -EIO; |
| 645 | goto err; |
| 646 | } |
| 647 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 648 | found_start = btrfs_header_bytenr(eb); |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 649 | if (found_start != eb->start) { |
Zhao Lei | 02873e4 | 2015-12-31 22:46:45 +0800 | [diff] [blame] | 650 | btrfs_err_rl(fs_info, "bad tree block start %llu %llu", |
| 651 | found_start, eb->start); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 652 | ret = -EIO; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 653 | goto err; |
| 654 | } |
Zhao Lei | 02873e4 | 2015-12-31 22:46:45 +0800 | [diff] [blame] | 655 | if (check_tree_block_fsid(fs_info, eb)) { |
| 656 | btrfs_err_rl(fs_info, "bad fsid on block %llu", |
| 657 | eb->start); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 658 | ret = -EIO; |
| 659 | goto err; |
| 660 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 661 | found_level = btrfs_header_level(eb); |
Josef Bacik | 1c24c3c | 2013-04-23 11:30:14 -0400 | [diff] [blame] | 662 | if (found_level >= BTRFS_MAX_LEVEL) { |
Zhao Lei | 02873e4 | 2015-12-31 22:46:45 +0800 | [diff] [blame] | 663 | btrfs_err(fs_info, "bad tree block level %d", |
| 664 | (int)btrfs_header_level(eb)); |
Josef Bacik | 1c24c3c | 2013-04-23 11:30:14 -0400 | [diff] [blame] | 665 | ret = -EIO; |
| 666 | goto err; |
| 667 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 668 | |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 669 | btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), |
| 670 | eb, found_level); |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 671 | |
Zhao Lei | 02873e4 | 2015-12-31 22:46:45 +0800 | [diff] [blame] | 672 | ret = csum_tree_block(fs_info, eb, 1); |
Alex Lyakas | 8bd98f0 | 2016-03-10 13:09:46 +0200 | [diff] [blame] | 673 | if (ret) |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 674 | goto err; |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 675 | |
| 676 | /* |
| 677 | * If this is a leaf block and it is corrupt, set the corrupt bit so |
| 678 | * that we don't try and read the other copies of this block, just |
| 679 | * return -EIO. |
| 680 | */ |
| 681 | if (found_level == 0 && check_leaf(root, eb)) { |
| 682 | set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); |
| 683 | ret = -EIO; |
| 684 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 685 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 686 | if (!ret) |
| 687 | set_extent_buffer_uptodate(eb); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 688 | err: |
Josef Bacik | 79fb65a | 2013-04-20 10:18:27 -0400 | [diff] [blame] | 689 | if (reads_done && |
| 690 | test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) |
Zhao Lei | 02873e4 | 2015-12-31 22:46:45 +0800 | [diff] [blame] | 691 | btree_readahead_hook(fs_info, eb, eb->start, ret); |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 692 | |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 693 | if (ret) { |
| 694 | /* |
| 695 | * our io error hook is going to dec the io pages |
| 696 | * again, we have to make sure it has something |
| 697 | * to decrement |
| 698 | */ |
| 699 | atomic_inc(&eb->io_pages); |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 700 | clear_extent_buffer_uptodate(eb); |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 701 | } |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 702 | free_extent_buffer(eb); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 703 | out: |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 704 | return ret; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 705 | } |
| 706 | |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 707 | static int btree_io_failed_hook(struct page *page, int failed_mirror) |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 708 | { |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 709 | struct extent_buffer *eb; |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 710 | |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 711 | eb = (struct extent_buffer *)page->private; |
Filipe Manana | 656f30d | 2014-09-26 12:25:56 +0100 | [diff] [blame] | 712 | set_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags); |
Josef Bacik | 5cf1ab5 | 2012-04-16 09:42:26 -0400 | [diff] [blame] | 713 | eb->read_mirror = failed_mirror; |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 714 | atomic_dec(&eb->io_pages); |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 715 | if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) |
Zhao Lei | 02873e4 | 2015-12-31 22:46:45 +0800 | [diff] [blame] | 716 | btree_readahead_hook(eb->fs_info, eb, eb->start, -EIO); |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 717 | return -EIO; /* we fixed nothing */ |
| 718 | } |
| 719 | |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 720 | static void end_workqueue_bio(struct bio *bio) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 721 | { |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 722 | struct btrfs_end_io_wq *end_io_wq = bio->bi_private; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 723 | struct btrfs_fs_info *fs_info; |
Liu Bo | 9e0af23 | 2014-08-15 23:36:53 +0800 | [diff] [blame] | 724 | struct btrfs_workqueue *wq; |
| 725 | btrfs_work_func_t func; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 726 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 727 | fs_info = end_io_wq->info; |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 728 | end_io_wq->error = bio->bi_error; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 729 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 730 | if (bio->bi_rw & REQ_WRITE) { |
Liu Bo | 9e0af23 | 2014-08-15 23:36:53 +0800 | [diff] [blame] | 731 | if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) { |
| 732 | wq = fs_info->endio_meta_write_workers; |
| 733 | func = btrfs_endio_meta_write_helper; |
| 734 | } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) { |
| 735 | wq = fs_info->endio_freespace_worker; |
| 736 | func = btrfs_freespace_write_helper; |
| 737 | } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) { |
| 738 | wq = fs_info->endio_raid56_workers; |
| 739 | func = btrfs_endio_raid56_helper; |
| 740 | } else { |
| 741 | wq = fs_info->endio_write_workers; |
| 742 | func = btrfs_endio_write_helper; |
| 743 | } |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 744 | } else { |
Miao Xie | 8b110e3 | 2014-09-12 18:44:03 +0800 | [diff] [blame] | 745 | if (unlikely(end_io_wq->metadata == |
| 746 | BTRFS_WQ_ENDIO_DIO_REPAIR)) { |
| 747 | wq = fs_info->endio_repair_workers; |
| 748 | func = btrfs_endio_repair_helper; |
| 749 | } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) { |
Liu Bo | 9e0af23 | 2014-08-15 23:36:53 +0800 | [diff] [blame] | 750 | wq = fs_info->endio_raid56_workers; |
| 751 | func = btrfs_endio_raid56_helper; |
| 752 | } else if (end_io_wq->metadata) { |
| 753 | wq = fs_info->endio_meta_workers; |
| 754 | func = btrfs_endio_meta_helper; |
| 755 | } else { |
| 756 | wq = fs_info->endio_workers; |
| 757 | func = btrfs_endio_helper; |
| 758 | } |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 759 | } |
Liu Bo | 9e0af23 | 2014-08-15 23:36:53 +0800 | [diff] [blame] | 760 | |
| 761 | btrfs_init_work(&end_io_wq->work, func, end_workqueue_fn, NULL, NULL); |
| 762 | btrfs_queue_work(wq, &end_io_wq->work); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 763 | } |
| 764 | |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 765 | 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] | 766 | enum btrfs_wq_endio_type metadata) |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 767 | { |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 768 | struct btrfs_end_io_wq *end_io_wq; |
Miao Xie | 8b110e3 | 2014-09-12 18:44:03 +0800 | [diff] [blame] | 769 | |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 770 | 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] | 771 | if (!end_io_wq) |
| 772 | return -ENOMEM; |
| 773 | |
| 774 | end_io_wq->private = bio->bi_private; |
| 775 | end_io_wq->end_io = bio->bi_end_io; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 776 | end_io_wq->info = info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 777 | end_io_wq->error = 0; |
| 778 | end_io_wq->bio = bio; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 779 | end_io_wq->metadata = metadata; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 780 | |
| 781 | bio->bi_private = end_io_wq; |
| 782 | bio->bi_end_io = end_workqueue_bio; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 783 | return 0; |
| 784 | } |
| 785 | |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 786 | unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 787 | { |
| 788 | unsigned long limit = min_t(unsigned long, |
Qu Wenruo | 5cdc7ad3 | 2014-02-28 10:46:06 +0800 | [diff] [blame] | 789 | info->thread_pool_size, |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 790 | info->fs_devices->open_devices); |
| 791 | return 256 * limit; |
| 792 | } |
| 793 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 794 | static void run_one_async_start(struct btrfs_work *work) |
| 795 | { |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 796 | struct async_submit_bio *async; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 797 | int ret; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 798 | |
| 799 | async = container_of(work, struct async_submit_bio, work); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 800 | ret = async->submit_bio_start(async->inode, async->rw, async->bio, |
| 801 | async->mirror_num, async->bio_flags, |
| 802 | async->bio_offset); |
| 803 | if (ret) |
| 804 | async->error = ret; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 805 | } |
| 806 | |
| 807 | static void run_one_async_done(struct btrfs_work *work) |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 808 | { |
| 809 | struct btrfs_fs_info *fs_info; |
| 810 | struct async_submit_bio *async; |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 811 | int limit; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 812 | |
| 813 | async = container_of(work, struct async_submit_bio, work); |
| 814 | fs_info = BTRFS_I(async->inode)->root->fs_info; |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 815 | |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 816 | limit = btrfs_async_submit_limit(fs_info); |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 817 | limit = limit * 2 / 3; |
| 818 | |
David Sterba | ee86395 | 2015-02-16 19:41:40 +0100 | [diff] [blame] | 819 | /* |
| 820 | * atomic_dec_return implies a barrier for waitqueue_active |
| 821 | */ |
Josef Bacik | 66657b3 | 2012-08-01 15:36:24 -0400 | [diff] [blame] | 822 | if (atomic_dec_return(&fs_info->nr_async_submits) < limit && |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 823 | waitqueue_active(&fs_info->async_submit_wait)) |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 824 | wake_up(&fs_info->async_submit_wait); |
| 825 | |
Adam Buchbinder | bb7ab3b | 2016-03-04 11:23:12 -0800 | [diff] [blame] | 826 | /* If an error occurred we just want to clean up the bio and move on */ |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 827 | if (async->error) { |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 828 | async->bio->bi_error = async->error; |
| 829 | bio_endio(async->bio); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 830 | return; |
| 831 | } |
| 832 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 833 | async->submit_bio_done(async->inode, async->rw, async->bio, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 834 | async->mirror_num, async->bio_flags, |
| 835 | async->bio_offset); |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 836 | } |
| 837 | |
| 838 | static void run_one_async_free(struct btrfs_work *work) |
| 839 | { |
| 840 | struct async_submit_bio *async; |
| 841 | |
| 842 | async = container_of(work, struct async_submit_bio, work); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 843 | kfree(async); |
| 844 | } |
| 845 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 846 | int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, |
| 847 | int rw, struct bio *bio, int mirror_num, |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 848 | unsigned long bio_flags, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 849 | u64 bio_offset, |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 850 | extent_submit_bio_hook_t *submit_bio_start, |
| 851 | extent_submit_bio_hook_t *submit_bio_done) |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 852 | { |
| 853 | struct async_submit_bio *async; |
| 854 | |
| 855 | async = kmalloc(sizeof(*async), GFP_NOFS); |
| 856 | if (!async) |
| 857 | return -ENOMEM; |
| 858 | |
| 859 | async->inode = inode; |
| 860 | async->rw = rw; |
| 861 | async->bio = bio; |
| 862 | async->mirror_num = mirror_num; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 863 | async->submit_bio_start = submit_bio_start; |
| 864 | async->submit_bio_done = submit_bio_done; |
| 865 | |
Liu Bo | 9e0af23 | 2014-08-15 23:36:53 +0800 | [diff] [blame] | 866 | btrfs_init_work(&async->work, btrfs_worker_helper, run_one_async_start, |
Qu Wenruo | 5cdc7ad3 | 2014-02-28 10:46:06 +0800 | [diff] [blame] | 867 | run_one_async_done, run_one_async_free); |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 868 | |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 869 | async->bio_flags = bio_flags; |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 870 | async->bio_offset = bio_offset; |
Chris Mason | 8c8bee1 | 2008-09-29 11:19:10 -0400 | [diff] [blame] | 871 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 872 | async->error = 0; |
| 873 | |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 874 | atomic_inc(&fs_info->nr_async_submits); |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 875 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 876 | if (rw & REQ_SYNC) |
Qu Wenruo | 5cdc7ad3 | 2014-02-28 10:46:06 +0800 | [diff] [blame] | 877 | btrfs_set_work_high_priority(&async->work); |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 878 | |
Qu Wenruo | 5cdc7ad3 | 2014-02-28 10:46:06 +0800 | [diff] [blame] | 879 | btrfs_queue_work(fs_info->workers, &async->work); |
Chris Mason | 9473f16 | 2008-08-28 06:15:24 -0400 | [diff] [blame] | 880 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 881 | while (atomic_read(&fs_info->async_submit_draining) && |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 882 | atomic_read(&fs_info->nr_async_submits)) { |
| 883 | wait_event(fs_info->async_submit_wait, |
| 884 | (atomic_read(&fs_info->nr_async_submits) == 0)); |
| 885 | } |
| 886 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 887 | return 0; |
| 888 | } |
| 889 | |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 890 | static int btree_csum_one_bio(struct bio *bio) |
| 891 | { |
Kent Overstreet | 2c30c71 | 2013-11-07 12:20:26 -0800 | [diff] [blame] | 892 | struct bio_vec *bvec; |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 893 | struct btrfs_root *root; |
Kent Overstreet | 2c30c71 | 2013-11-07 12:20:26 -0800 | [diff] [blame] | 894 | int i, ret = 0; |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 895 | |
Kent Overstreet | 2c30c71 | 2013-11-07 12:20:26 -0800 | [diff] [blame] | 896 | bio_for_each_segment_all(bvec, bio, i) { |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 897 | root = BTRFS_I(bvec->bv_page->mapping->host)->root; |
Daniel Dressler | 01d5847 | 2014-11-21 17:15:07 +0900 | [diff] [blame] | 898 | ret = csum_dirty_buffer(root->fs_info, bvec->bv_page); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 899 | if (ret) |
| 900 | break; |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 901 | } |
Kent Overstreet | 2c30c71 | 2013-11-07 12:20:26 -0800 | [diff] [blame] | 902 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 903 | return ret; |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 904 | } |
| 905 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 906 | static int __btree_submit_bio_start(struct inode *inode, int rw, |
| 907 | struct bio *bio, int mirror_num, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 908 | unsigned long bio_flags, |
| 909 | u64 bio_offset) |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 910 | { |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 911 | /* |
| 912 | * 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] | 913 | * submission context. Just jump into btrfs_map_bio |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 914 | */ |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 915 | return btree_csum_one_bio(bio); |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 916 | } |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 917 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 918 | 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] | 919 | int mirror_num, unsigned long bio_flags, |
| 920 | u64 bio_offset) |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 921 | { |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 922 | int ret; |
| 923 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 924 | /* |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 925 | * when we're called for a write, we're already in the async |
| 926 | * submission context. Just jump into btrfs_map_bio |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 927 | */ |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 928 | ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 929 | if (ret) { |
| 930 | bio->bi_error = ret; |
| 931 | bio_endio(bio); |
| 932 | } |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 933 | return ret; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 934 | } |
| 935 | |
Josef Bacik | de0022b | 2012-09-25 14:25:58 -0400 | [diff] [blame] | 936 | static int check_async_write(struct inode *inode, unsigned long bio_flags) |
| 937 | { |
| 938 | if (bio_flags & EXTENT_BIO_TREE_LOG) |
| 939 | return 0; |
| 940 | #ifdef CONFIG_X86 |
Borislav Petkov | bc696ca | 2016-01-26 22:12:05 +0100 | [diff] [blame] | 941 | if (static_cpu_has(X86_FEATURE_XMM4_2)) |
Josef Bacik | de0022b | 2012-09-25 14:25:58 -0400 | [diff] [blame] | 942 | return 0; |
| 943 | #endif |
| 944 | return 1; |
| 945 | } |
| 946 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 947 | 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] | 948 | int mirror_num, unsigned long bio_flags, |
| 949 | u64 bio_offset) |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 950 | { |
Josef Bacik | de0022b | 2012-09-25 14:25:58 -0400 | [diff] [blame] | 951 | int async = check_async_write(inode, bio_flags); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 952 | int ret; |
| 953 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 954 | if (!(rw & REQ_WRITE)) { |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 955 | /* |
| 956 | * called for a read, do the setup so that checksum validation |
| 957 | * can happen in the async kernel threads |
| 958 | */ |
Chris Mason | f3f266a | 2012-03-23 10:22:46 -0400 | [diff] [blame] | 959 | ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, |
David Sterba | bfebd8b | 2014-07-30 00:25:45 +0200 | [diff] [blame] | 960 | bio, BTRFS_WQ_ENDIO_METADATA); |
Chris Mason | 1d4284b | 2012-03-28 20:31:37 -0400 | [diff] [blame] | 961 | if (ret) |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 962 | goto out_w_error; |
| 963 | ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, |
| 964 | mirror_num, 0); |
Josef Bacik | de0022b | 2012-09-25 14:25:58 -0400 | [diff] [blame] | 965 | } else if (!async) { |
| 966 | ret = btree_csum_one_bio(bio); |
| 967 | if (ret) |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 968 | goto out_w_error; |
| 969 | ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, |
| 970 | mirror_num, 0); |
| 971 | } else { |
| 972 | /* |
| 973 | * kthread helpers are used to submit writes so that |
| 974 | * checksumming can happen in parallel across all CPUs |
| 975 | */ |
| 976 | ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, |
| 977 | inode, rw, bio, mirror_num, 0, |
| 978 | bio_offset, |
| 979 | __btree_submit_bio_start, |
| 980 | __btree_submit_bio_done); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 981 | } |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 982 | |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 983 | if (ret) |
| 984 | goto out_w_error; |
| 985 | return 0; |
| 986 | |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 987 | out_w_error: |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 988 | bio->bi_error = ret; |
| 989 | bio_endio(bio); |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 990 | return ret; |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 991 | } |
| 992 | |
Jan Beulich | 3dd1462 | 2010-12-07 14:54:09 +0000 | [diff] [blame] | 993 | #ifdef CONFIG_MIGRATION |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 994 | static int btree_migratepage(struct address_space *mapping, |
Mel Gorman | a6bc32b | 2012-01-12 17:19:43 -0800 | [diff] [blame] | 995 | struct page *newpage, struct page *page, |
| 996 | enum migrate_mode mode) |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 997 | { |
| 998 | /* |
| 999 | * we can't safely write a btree page from here, |
| 1000 | * we haven't done the locking hook |
| 1001 | */ |
| 1002 | if (PageDirty(page)) |
| 1003 | return -EAGAIN; |
| 1004 | /* |
| 1005 | * Buffers may be managed in a filesystem specific way. |
| 1006 | * We must have no buffers or drop them. |
| 1007 | */ |
| 1008 | if (page_has_private(page) && |
| 1009 | !try_to_release_page(page, GFP_KERNEL)) |
| 1010 | return -EAGAIN; |
Mel Gorman | a6bc32b | 2012-01-12 17:19:43 -0800 | [diff] [blame] | 1011 | return migrate_page(mapping, newpage, page, mode); |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 1012 | } |
Jan Beulich | 3dd1462 | 2010-12-07 14:54:09 +0000 | [diff] [blame] | 1013 | #endif |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 1014 | |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 1015 | |
| 1016 | static int btree_writepages(struct address_space *mapping, |
| 1017 | struct writeback_control *wbc) |
| 1018 | { |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 1019 | struct btrfs_fs_info *fs_info; |
| 1020 | int ret; |
| 1021 | |
Chris Mason | d8d5f3e | 2007-12-11 12:42:00 -0500 | [diff] [blame] | 1022 | if (wbc->sync_mode == WB_SYNC_NONE) { |
Chris Mason | 448d640 | 2007-11-27 07:52:01 -0800 | [diff] [blame] | 1023 | |
| 1024 | if (wbc->for_kupdate) |
| 1025 | return 0; |
| 1026 | |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 1027 | fs_info = BTRFS_I(mapping->host)->root->fs_info; |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 1028 | /* this is a bit racy, but that's ok */ |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 1029 | ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, |
| 1030 | BTRFS_DIRTY_METADATA_THRESH); |
| 1031 | if (ret < 0) |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 1032 | return 0; |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 1033 | } |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1034 | return btree_write_cache_pages(mapping, wbc); |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 1035 | } |
| 1036 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 1037 | static int btree_readpage(struct file *file, struct page *page) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1038 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1039 | struct extent_io_tree *tree; |
| 1040 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Jan Schmidt | 8ddc7d9 | 2011-06-13 20:02:58 +0200 | [diff] [blame] | 1041 | return extent_read_full_page(tree, page, btree_get_extent, 0); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1042 | } |
| 1043 | |
Chris Mason | 70dec80 | 2008-01-29 09:59:12 -0500 | [diff] [blame] | 1044 | static int btree_releasepage(struct page *page, gfp_t gfp_flags) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1045 | { |
Chris Mason | 98509cf | 2008-09-11 15:51:43 -0400 | [diff] [blame] | 1046 | if (PageWriteback(page) || PageDirty(page)) |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1047 | return 0; |
David Sterba | 0c4e538 | 2012-01-26 15:01:12 -0500 | [diff] [blame] | 1048 | |
David Sterba | f7a52a4 | 2013-04-26 14:56:29 +0000 | [diff] [blame] | 1049 | return try_release_extent_buffer(page); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1050 | } |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 1051 | |
Lukas Czerner | d47992f | 2013-05-21 23:17:23 -0400 | [diff] [blame] | 1052 | static void btree_invalidatepage(struct page *page, unsigned int offset, |
| 1053 | unsigned int length) |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1054 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1055 | struct extent_io_tree *tree; |
| 1056 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1057 | extent_invalidatepage(tree, page, offset); |
| 1058 | btree_releasepage(page, GFP_NOFS); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 1059 | if (PagePrivate(page)) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 1060 | btrfs_warn(BTRFS_I(page->mapping->host)->root->fs_info, |
| 1061 | "page private not zero on page %llu", |
| 1062 | (unsigned long long)page_offset(page)); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 1063 | ClearPagePrivate(page); |
| 1064 | set_page_private(page, 0); |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1065 | put_page(page); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 1066 | } |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1067 | } |
| 1068 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1069 | static int btree_set_page_dirty(struct page *page) |
| 1070 | { |
Josef Bacik | bb146eb | 2012-10-15 13:30:43 -0400 | [diff] [blame] | 1071 | #ifdef DEBUG |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1072 | struct extent_buffer *eb; |
| 1073 | |
| 1074 | BUG_ON(!PagePrivate(page)); |
| 1075 | eb = (struct extent_buffer *)page->private; |
| 1076 | BUG_ON(!eb); |
| 1077 | BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); |
| 1078 | BUG_ON(!atomic_read(&eb->refs)); |
| 1079 | btrfs_assert_tree_locked(eb); |
Josef Bacik | bb146eb | 2012-10-15 13:30:43 -0400 | [diff] [blame] | 1080 | #endif |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1081 | return __set_page_dirty_nobuffers(page); |
| 1082 | } |
| 1083 | |
Alexey Dobriyan | 7f09410 | 2009-09-21 17:01:10 -0700 | [diff] [blame] | 1084 | static const struct address_space_operations btree_aops = { |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1085 | .readpage = btree_readpage, |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 1086 | .writepages = btree_writepages, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1087 | .releasepage = btree_releasepage, |
| 1088 | .invalidatepage = btree_invalidatepage, |
Chris Mason | 5a92bc8 | 2010-11-29 09:49:11 -0500 | [diff] [blame] | 1089 | #ifdef CONFIG_MIGRATION |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 1090 | .migratepage = btree_migratepage, |
Chris Mason | 5a92bc8 | 2010-11-29 09:49:11 -0500 | [diff] [blame] | 1091 | #endif |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1092 | .set_page_dirty = btree_set_page_dirty, |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1093 | }; |
| 1094 | |
David Sterba | d3e46fe | 2014-06-15 02:04:19 +0200 | [diff] [blame] | 1095 | void readahead_tree_block(struct btrfs_root *root, u64 bytenr) |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 1096 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1097 | struct extent_buffer *buf = NULL; |
| 1098 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 1099 | |
David Sterba | a83fffb | 2014-06-15 02:39:54 +0200 | [diff] [blame] | 1100 | buf = btrfs_find_create_tree_block(root, bytenr); |
Liu Bo | c871b0f | 2016-06-06 12:01:23 -0700 | [diff] [blame] | 1101 | if (IS_ERR(buf)) |
David Sterba | 6197d86 | 2014-06-15 00:49:36 +0200 | [diff] [blame] | 1102 | return; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1103 | read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, |
Arne Jansen | bb82ab8 | 2011-06-10 14:06:53 +0200 | [diff] [blame] | 1104 | buf, 0, WAIT_NONE, btree_get_extent, 0); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1105 | free_extent_buffer(buf); |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 1106 | } |
| 1107 | |
David Sterba | c0dcaa4 | 2014-06-15 02:24:21 +0200 | [diff] [blame] | 1108 | int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, |
Arne Jansen | ab0fff0 | 2011-05-23 14:25:41 +0200 | [diff] [blame] | 1109 | int mirror_num, struct extent_buffer **eb) |
| 1110 | { |
| 1111 | struct extent_buffer *buf = NULL; |
| 1112 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 1113 | struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; |
| 1114 | int ret; |
| 1115 | |
David Sterba | a83fffb | 2014-06-15 02:39:54 +0200 | [diff] [blame] | 1116 | buf = btrfs_find_create_tree_block(root, bytenr); |
Liu Bo | c871b0f | 2016-06-06 12:01:23 -0700 | [diff] [blame] | 1117 | if (IS_ERR(buf)) |
Arne Jansen | ab0fff0 | 2011-05-23 14:25:41 +0200 | [diff] [blame] | 1118 | return 0; |
| 1119 | |
| 1120 | set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); |
| 1121 | |
| 1122 | ret = read_extent_buffer_pages(io_tree, buf, 0, WAIT_PAGE_LOCK, |
| 1123 | btree_get_extent, mirror_num); |
| 1124 | if (ret) { |
| 1125 | free_extent_buffer(buf); |
| 1126 | return ret; |
| 1127 | } |
| 1128 | |
| 1129 | if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { |
| 1130 | free_extent_buffer(buf); |
| 1131 | return -EIO; |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1132 | } else if (extent_buffer_uptodate(buf)) { |
Arne Jansen | ab0fff0 | 2011-05-23 14:25:41 +0200 | [diff] [blame] | 1133 | *eb = buf; |
| 1134 | } else { |
| 1135 | free_extent_buffer(buf); |
| 1136 | } |
| 1137 | return 0; |
| 1138 | } |
| 1139 | |
Daniel Dressler | 01d5847 | 2014-11-21 17:15:07 +0900 | [diff] [blame] | 1140 | struct extent_buffer *btrfs_find_tree_block(struct btrfs_fs_info *fs_info, |
David Sterba | 0308af4 | 2014-06-15 01:43:40 +0200 | [diff] [blame] | 1141 | u64 bytenr) |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 1142 | { |
Daniel Dressler | 01d5847 | 2014-11-21 17:15:07 +0900 | [diff] [blame] | 1143 | return find_extent_buffer(fs_info, bytenr); |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 1144 | } |
| 1145 | |
| 1146 | struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, |
David Sterba | a83fffb | 2014-06-15 02:39:54 +0200 | [diff] [blame] | 1147 | u64 bytenr) |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 1148 | { |
David Sterba | fccb84c | 2014-09-29 23:53:21 +0200 | [diff] [blame] | 1149 | if (btrfs_test_is_dummy_root(root)) |
Feifei Xu | b9ef22d | 2016-06-01 19:18:25 +0800 | [diff] [blame] | 1150 | return alloc_test_extent_buffer(root->fs_info, bytenr, |
| 1151 | root->nodesize); |
David Sterba | ce3e698 | 2014-06-15 03:00:04 +0200 | [diff] [blame] | 1152 | return alloc_extent_buffer(root->fs_info, bytenr); |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 1153 | } |
| 1154 | |
| 1155 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1156 | int btrfs_write_tree_block(struct extent_buffer *buf) |
| 1157 | { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 1158 | return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, |
Christoph Hellwig | 8aa38c3 | 2009-10-01 12:58:30 -0400 | [diff] [blame] | 1159 | buf->start + buf->len - 1); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1160 | } |
| 1161 | |
| 1162 | int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) |
| 1163 | { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 1164 | return filemap_fdatawait_range(buf->pages[0]->mapping, |
Christoph Hellwig | 8aa38c3 | 2009-10-01 12:58:30 -0400 | [diff] [blame] | 1165 | buf->start, buf->start + buf->len - 1); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1166 | } |
| 1167 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1168 | struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, |
David Sterba | ce86cd5 | 2014-06-15 01:07:32 +0200 | [diff] [blame] | 1169 | u64 parent_transid) |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1170 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1171 | struct extent_buffer *buf = NULL; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1172 | int ret; |
| 1173 | |
David Sterba | a83fffb | 2014-06-15 02:39:54 +0200 | [diff] [blame] | 1174 | buf = btrfs_find_create_tree_block(root, bytenr); |
Liu Bo | c871b0f | 2016-06-06 12:01:23 -0700 | [diff] [blame] | 1175 | if (IS_ERR(buf)) |
| 1176 | return buf; |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 1177 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 1178 | 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] | 1179 | if (ret) { |
| 1180 | free_extent_buffer(buf); |
Liu Bo | 64c043d | 2015-05-25 17:30:15 +0800 | [diff] [blame] | 1181 | return ERR_PTR(ret); |
Filipe David Borba Manana | 0f0fe8f | 2013-07-31 00:39:56 +0100 | [diff] [blame] | 1182 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1183 | return buf; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1184 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1185 | } |
| 1186 | |
Daniel Dressler | 01d5847 | 2014-11-21 17:15:07 +0900 | [diff] [blame] | 1187 | void clean_tree_block(struct btrfs_trans_handle *trans, |
| 1188 | struct btrfs_fs_info *fs_info, |
Jeff Mahoney | d5c13f9 | 2012-03-01 14:56:27 +0100 | [diff] [blame] | 1189 | struct extent_buffer *buf) |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 1190 | { |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 1191 | if (btrfs_header_generation(buf) == |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 1192 | fs_info->running_transaction->transid) { |
Chris Mason | b9447ef | 2009-03-09 11:45:38 -0400 | [diff] [blame] | 1193 | btrfs_assert_tree_locked(buf); |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 1194 | |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 1195 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 1196 | __percpu_counter_add(&fs_info->dirty_metadata_bytes, |
| 1197 | -buf->len, |
| 1198 | fs_info->dirty_metadata_batch); |
Josef Bacik | ed7b63e | 2012-10-15 13:33:54 -0400 | [diff] [blame] | 1199 | /* ugh, clear_extent_buffer_dirty needs to lock the page */ |
| 1200 | btrfs_set_lock_blocking(buf); |
| 1201 | clear_extent_buffer_dirty(buf); |
| 1202 | } |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1203 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1204 | } |
| 1205 | |
Miao Xie | 8257b2d | 2014-03-06 13:38:19 +0800 | [diff] [blame] | 1206 | static struct btrfs_subvolume_writers *btrfs_alloc_subvolume_writers(void) |
| 1207 | { |
| 1208 | struct btrfs_subvolume_writers *writers; |
| 1209 | int ret; |
| 1210 | |
| 1211 | writers = kmalloc(sizeof(*writers), GFP_NOFS); |
| 1212 | if (!writers) |
| 1213 | return ERR_PTR(-ENOMEM); |
| 1214 | |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 1215 | ret = percpu_counter_init(&writers->counter, 0, GFP_KERNEL); |
Miao Xie | 8257b2d | 2014-03-06 13:38:19 +0800 | [diff] [blame] | 1216 | if (ret < 0) { |
| 1217 | kfree(writers); |
| 1218 | return ERR_PTR(ret); |
| 1219 | } |
| 1220 | |
| 1221 | init_waitqueue_head(&writers->wait); |
| 1222 | return writers; |
| 1223 | } |
| 1224 | |
| 1225 | static void |
| 1226 | btrfs_free_subvolume_writers(struct btrfs_subvolume_writers *writers) |
| 1227 | { |
| 1228 | percpu_counter_destroy(&writers->counter); |
| 1229 | kfree(writers); |
| 1230 | } |
| 1231 | |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 1232 | static void __setup_root(u32 nodesize, u32 sectorsize, u32 stripesize, |
| 1233 | struct btrfs_root *root, struct btrfs_fs_info *fs_info, |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 1234 | u64 objectid) |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 1235 | { |
Jeff Mahoney | 7c0260e | 2016-06-20 14:14:09 -0400 | [diff] [blame^] | 1236 | bool dummy = test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 1237 | root->node = NULL; |
Chris Mason | a28ec19 | 2007-03-06 20:08:01 -0500 | [diff] [blame] | 1238 | root->commit_root = NULL; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1239 | root->sectorsize = sectorsize; |
| 1240 | root->nodesize = nodesize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1241 | root->stripesize = stripesize; |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 1242 | root->state = 0; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1243 | root->orphan_cleanup_state = 0; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1244 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1245 | root->objectid = objectid; |
| 1246 | root->last_trans = 0; |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1247 | root->highest_objectid = 0; |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 1248 | root->nr_delalloc_inodes = 0; |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 1249 | root->nr_ordered_extents = 0; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1250 | root->name = NULL; |
Eric Paris | 6bef4d3 | 2010-02-23 19:43:04 +0000 | [diff] [blame] | 1251 | root->inode_tree = RB_ROOT; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 1252 | INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1253 | root->block_rsv = NULL; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1254 | root->orphan_block_rsv = NULL; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1255 | |
| 1256 | INIT_LIST_HEAD(&root->dirty_list); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1257 | INIT_LIST_HEAD(&root->root_list); |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 1258 | INIT_LIST_HEAD(&root->delalloc_inodes); |
| 1259 | INIT_LIST_HEAD(&root->delalloc_root); |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 1260 | INIT_LIST_HEAD(&root->ordered_extents); |
| 1261 | INIT_LIST_HEAD(&root->ordered_root); |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 1262 | INIT_LIST_HEAD(&root->logged_list[0]); |
| 1263 | INIT_LIST_HEAD(&root->logged_list[1]); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1264 | spin_lock_init(&root->orphan_lock); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1265 | spin_lock_init(&root->inode_lock); |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 1266 | spin_lock_init(&root->delalloc_lock); |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 1267 | spin_lock_init(&root->ordered_extent_lock); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1268 | spin_lock_init(&root->accounting_lock); |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 1269 | spin_lock_init(&root->log_extents_lock[0]); |
| 1270 | spin_lock_init(&root->log_extents_lock[1]); |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1271 | mutex_init(&root->objectid_mutex); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1272 | mutex_init(&root->log_mutex); |
Miao Xie | 31f3d25 | 2014-03-06 13:55:02 +0800 | [diff] [blame] | 1273 | mutex_init(&root->ordered_extent_mutex); |
Miao Xie | 573bfb7 | 2014-03-06 13:55:03 +0800 | [diff] [blame] | 1274 | mutex_init(&root->delalloc_mutex); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1275 | init_waitqueue_head(&root->log_writer_wait); |
| 1276 | init_waitqueue_head(&root->log_commit_wait[0]); |
| 1277 | init_waitqueue_head(&root->log_commit_wait[1]); |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 1278 | INIT_LIST_HEAD(&root->log_ctxs[0]); |
| 1279 | INIT_LIST_HEAD(&root->log_ctxs[1]); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1280 | atomic_set(&root->log_commit[0], 0); |
| 1281 | atomic_set(&root->log_commit[1], 0); |
| 1282 | atomic_set(&root->log_writers, 0); |
Miao Xie | 2ecb792 | 2012-09-06 04:04:27 -0600 | [diff] [blame] | 1283 | atomic_set(&root->log_batch, 0); |
Josef Bacik | 8a35d95 | 2012-05-23 14:26:42 -0400 | [diff] [blame] | 1284 | atomic_set(&root->orphan_inodes, 0); |
Miao Xie | b0feb9d | 2013-05-15 07:48:20 +0000 | [diff] [blame] | 1285 | atomic_set(&root->refs, 1); |
Miao Xie | 8257b2d | 2014-03-06 13:38:19 +0800 | [diff] [blame] | 1286 | atomic_set(&root->will_be_snapshoted, 0); |
Qu Wenruo | 55eeaf0 | 2015-09-08 17:08:38 +0800 | [diff] [blame] | 1287 | atomic_set(&root->qgroup_meta_rsv, 0); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1288 | root->log_transid = 0; |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 1289 | root->log_transid_committed = -1; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 1290 | root->last_log_commit = 0; |
Jeff Mahoney | 7c0260e | 2016-06-20 14:14:09 -0400 | [diff] [blame^] | 1291 | if (!dummy) |
Josef Bacik | 06ea65a | 2013-09-19 16:07:01 -0400 | [diff] [blame] | 1292 | extent_io_tree_init(&root->dirty_log_pages, |
| 1293 | fs_info->btree_inode->i_mapping); |
Chris Mason | 017e536 | 2008-07-28 15:32:51 -0400 | [diff] [blame] | 1294 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1295 | memset(&root->root_key, 0, sizeof(root->root_key)); |
| 1296 | memset(&root->root_item, 0, sizeof(root->root_item)); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 1297 | memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); |
Jeff Mahoney | 7c0260e | 2016-06-20 14:14:09 -0400 | [diff] [blame^] | 1298 | if (!dummy) |
Josef Bacik | 06ea65a | 2013-09-19 16:07:01 -0400 | [diff] [blame] | 1299 | root->defrag_trans_start = fs_info->generation; |
| 1300 | else |
| 1301 | root->defrag_trans_start = 0; |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 1302 | root->root_key.objectid = objectid; |
Al Viro | 0ee5dc6 | 2011-07-07 15:44:25 -0400 | [diff] [blame] | 1303 | root->anon_dev = 0; |
Alexander Block | 8ea05e3 | 2012-07-25 17:35:53 +0200 | [diff] [blame] | 1304 | |
Anand Jain | 5f3ab90 | 2012-12-07 09:28:54 +0000 | [diff] [blame] | 1305 | spin_lock_init(&root->root_item_lock); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1306 | } |
| 1307 | |
David Sterba | 74e4d82 | 2016-02-11 11:01:55 +0100 | [diff] [blame] | 1308 | static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info, |
| 1309 | gfp_t flags) |
Al Viro | 6f07e42 | 2011-11-17 00:46:16 -0500 | [diff] [blame] | 1310 | { |
David Sterba | 74e4d82 | 2016-02-11 11:01:55 +0100 | [diff] [blame] | 1311 | struct btrfs_root *root = kzalloc(sizeof(*root), flags); |
Al Viro | 6f07e42 | 2011-11-17 00:46:16 -0500 | [diff] [blame] | 1312 | if (root) |
| 1313 | root->fs_info = fs_info; |
| 1314 | return root; |
| 1315 | } |
| 1316 | |
Josef Bacik | 06ea65a | 2013-09-19 16:07:01 -0400 | [diff] [blame] | 1317 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
| 1318 | /* Should only be used by the testing infrastructure */ |
Jeff Mahoney | 7c0260e | 2016-06-20 14:14:09 -0400 | [diff] [blame^] | 1319 | struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info, |
| 1320 | u32 sectorsize, u32 nodesize) |
Josef Bacik | 06ea65a | 2013-09-19 16:07:01 -0400 | [diff] [blame] | 1321 | { |
| 1322 | struct btrfs_root *root; |
| 1323 | |
Jeff Mahoney | 7c0260e | 2016-06-20 14:14:09 -0400 | [diff] [blame^] | 1324 | if (!fs_info) |
| 1325 | return ERR_PTR(-EINVAL); |
| 1326 | |
| 1327 | root = btrfs_alloc_root(fs_info, GFP_KERNEL); |
Josef Bacik | 06ea65a | 2013-09-19 16:07:01 -0400 | [diff] [blame] | 1328 | if (!root) |
| 1329 | return ERR_PTR(-ENOMEM); |
Feifei Xu | b9ef22d | 2016-06-01 19:18:25 +0800 | [diff] [blame] | 1330 | /* We don't use the stripesize in selftest, set it as sectorsize */ |
Jeff Mahoney | 7c0260e | 2016-06-20 14:14:09 -0400 | [diff] [blame^] | 1331 | __setup_root(nodesize, sectorsize, sectorsize, root, fs_info, |
Feifei Xu | ef9f2db | 2016-06-01 19:18:28 +0800 | [diff] [blame] | 1332 | BTRFS_ROOT_TREE_OBJECTID); |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 1333 | set_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state); |
Josef Bacik | faa2dbf | 2014-05-07 17:06:09 -0400 | [diff] [blame] | 1334 | root->alloc_bytenr = 0; |
Josef Bacik | 06ea65a | 2013-09-19 16:07:01 -0400 | [diff] [blame] | 1335 | |
| 1336 | return root; |
| 1337 | } |
| 1338 | #endif |
| 1339 | |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1340 | struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, |
| 1341 | struct btrfs_fs_info *fs_info, |
| 1342 | u64 objectid) |
| 1343 | { |
| 1344 | struct extent_buffer *leaf; |
| 1345 | struct btrfs_root *tree_root = fs_info->tree_root; |
| 1346 | struct btrfs_root *root; |
| 1347 | struct btrfs_key key; |
| 1348 | int ret = 0; |
Stefan Behrens | 6463fe5 | 2013-04-19 15:08:05 +0000 | [diff] [blame] | 1349 | uuid_le uuid; |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1350 | |
David Sterba | 74e4d82 | 2016-02-11 11:01:55 +0100 | [diff] [blame] | 1351 | root = btrfs_alloc_root(fs_info, GFP_KERNEL); |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1352 | if (!root) |
| 1353 | return ERR_PTR(-ENOMEM); |
| 1354 | |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 1355 | __setup_root(tree_root->nodesize, tree_root->sectorsize, |
| 1356 | tree_root->stripesize, root, fs_info, objectid); |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1357 | root->root_key.objectid = objectid; |
| 1358 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; |
| 1359 | root->root_key.offset = 0; |
| 1360 | |
David Sterba | 4d75f8a | 2014-06-15 01:54:12 +0200 | [diff] [blame] | 1361 | 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] | 1362 | if (IS_ERR(leaf)) { |
| 1363 | ret = PTR_ERR(leaf); |
Tsutomu Itoh | 1dd0568 | 2013-03-21 04:32:32 +0000 | [diff] [blame] | 1364 | leaf = NULL; |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1365 | goto fail; |
| 1366 | } |
| 1367 | |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1368 | memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); |
| 1369 | btrfs_set_header_bytenr(leaf, leaf->start); |
| 1370 | btrfs_set_header_generation(leaf, trans->transid); |
| 1371 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); |
| 1372 | btrfs_set_header_owner(leaf, objectid); |
| 1373 | root->node = leaf; |
| 1374 | |
Ross Kirk | 0a4e558 | 2013-09-24 10:12:38 +0100 | [diff] [blame] | 1375 | write_extent_buffer(leaf, fs_info->fsid, btrfs_header_fsid(), |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1376 | BTRFS_FSID_SIZE); |
| 1377 | write_extent_buffer(leaf, fs_info->chunk_tree_uuid, |
Geert Uytterhoeven | b308bc2 | 2013-08-20 13:20:15 +0200 | [diff] [blame] | 1378 | btrfs_header_chunk_tree_uuid(leaf), |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1379 | BTRFS_UUID_SIZE); |
| 1380 | btrfs_mark_buffer_dirty(leaf); |
| 1381 | |
| 1382 | root->commit_root = btrfs_root_node(root); |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 1383 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1384 | |
| 1385 | root->root_item.flags = 0; |
| 1386 | root->root_item.byte_limit = 0; |
| 1387 | btrfs_set_root_bytenr(&root->root_item, leaf->start); |
| 1388 | btrfs_set_root_generation(&root->root_item, trans->transid); |
| 1389 | btrfs_set_root_level(&root->root_item, 0); |
| 1390 | btrfs_set_root_refs(&root->root_item, 1); |
| 1391 | btrfs_set_root_used(&root->root_item, leaf->len); |
| 1392 | btrfs_set_root_last_snapshot(&root->root_item, 0); |
| 1393 | btrfs_set_root_dirid(&root->root_item, 0); |
Stefan Behrens | 6463fe5 | 2013-04-19 15:08:05 +0000 | [diff] [blame] | 1394 | uuid_le_gen(&uuid); |
| 1395 | memcpy(root->root_item.uuid, uuid.b, BTRFS_UUID_SIZE); |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1396 | root->root_item.drop_level = 0; |
| 1397 | |
| 1398 | key.objectid = objectid; |
| 1399 | key.type = BTRFS_ROOT_ITEM_KEY; |
| 1400 | key.offset = 0; |
| 1401 | ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); |
| 1402 | if (ret) |
| 1403 | goto fail; |
| 1404 | |
| 1405 | btrfs_tree_unlock(leaf); |
| 1406 | |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1407 | return root; |
Tsutomu Itoh | 1dd0568 | 2013-03-21 04:32:32 +0000 | [diff] [blame] | 1408 | |
| 1409 | fail: |
| 1410 | if (leaf) { |
| 1411 | btrfs_tree_unlock(leaf); |
Tsutomu Itoh | 59885b3 | 2014-04-09 09:18:04 +0900 | [diff] [blame] | 1412 | free_extent_buffer(root->commit_root); |
Tsutomu Itoh | 1dd0568 | 2013-03-21 04:32:32 +0000 | [diff] [blame] | 1413 | free_extent_buffer(leaf); |
| 1414 | } |
| 1415 | kfree(root); |
| 1416 | |
| 1417 | return ERR_PTR(ret); |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1418 | } |
| 1419 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1420 | static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, |
| 1421 | struct btrfs_fs_info *fs_info) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1422 | { |
| 1423 | struct btrfs_root *root; |
| 1424 | struct btrfs_root *tree_root = fs_info->tree_root; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1425 | struct extent_buffer *leaf; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1426 | |
David Sterba | 74e4d82 | 2016-02-11 11:01:55 +0100 | [diff] [blame] | 1427 | root = btrfs_alloc_root(fs_info, GFP_NOFS); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1428 | if (!root) |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1429 | return ERR_PTR(-ENOMEM); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1430 | |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 1431 | __setup_root(tree_root->nodesize, tree_root->sectorsize, |
| 1432 | tree_root->stripesize, root, fs_info, |
| 1433 | BTRFS_TREE_LOG_OBJECTID); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1434 | |
| 1435 | root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; |
| 1436 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; |
| 1437 | root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 1438 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1439 | /* |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 1440 | * DON'T set REF_COWS for log trees |
| 1441 | * |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1442 | * log trees do not get reference counted because they go away |
| 1443 | * before a real commit is actually done. They do store pointers |
| 1444 | * to file data extents, and those reference counts still get |
| 1445 | * updated (along with back refs to the log tree). |
| 1446 | */ |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1447 | |
David Sterba | 4d75f8a | 2014-06-15 01:54:12 +0200 | [diff] [blame] | 1448 | leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID, |
| 1449 | NULL, 0, 0, 0); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1450 | if (IS_ERR(leaf)) { |
| 1451 | kfree(root); |
| 1452 | return ERR_CAST(leaf); |
| 1453 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1454 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1455 | memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); |
| 1456 | btrfs_set_header_bytenr(leaf, leaf->start); |
| 1457 | btrfs_set_header_generation(leaf, trans->transid); |
| 1458 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); |
| 1459 | btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1460 | root->node = leaf; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1461 | |
| 1462 | write_extent_buffer(root->node, root->fs_info->fsid, |
Ross Kirk | 0a4e558 | 2013-09-24 10:12:38 +0100 | [diff] [blame] | 1463 | btrfs_header_fsid(), BTRFS_FSID_SIZE); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1464 | btrfs_mark_buffer_dirty(root->node); |
| 1465 | btrfs_tree_unlock(root->node); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1466 | return root; |
| 1467 | } |
| 1468 | |
| 1469 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, |
| 1470 | struct btrfs_fs_info *fs_info) |
| 1471 | { |
| 1472 | struct btrfs_root *log_root; |
| 1473 | |
| 1474 | log_root = alloc_log_tree(trans, fs_info); |
| 1475 | if (IS_ERR(log_root)) |
| 1476 | return PTR_ERR(log_root); |
| 1477 | WARN_ON(fs_info->log_root_tree); |
| 1478 | fs_info->log_root_tree = log_root; |
| 1479 | return 0; |
| 1480 | } |
| 1481 | |
| 1482 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, |
| 1483 | struct btrfs_root *root) |
| 1484 | { |
| 1485 | struct btrfs_root *log_root; |
| 1486 | struct btrfs_inode_item *inode_item; |
| 1487 | |
| 1488 | log_root = alloc_log_tree(trans, root->fs_info); |
| 1489 | if (IS_ERR(log_root)) |
| 1490 | return PTR_ERR(log_root); |
| 1491 | |
| 1492 | log_root->last_trans = trans->transid; |
| 1493 | log_root->root_key.offset = root->root_key.objectid; |
| 1494 | |
| 1495 | inode_item = &log_root->root_item.inode; |
Qu Wenruo | 3cae210 | 2013-07-16 11:19:18 +0800 | [diff] [blame] | 1496 | btrfs_set_stack_inode_generation(inode_item, 1); |
| 1497 | btrfs_set_stack_inode_size(inode_item, 3); |
| 1498 | btrfs_set_stack_inode_nlink(inode_item, 1); |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 1499 | btrfs_set_stack_inode_nbytes(inode_item, root->nodesize); |
Qu Wenruo | 3cae210 | 2013-07-16 11:19:18 +0800 | [diff] [blame] | 1500 | btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1501 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1502 | btrfs_set_root_node(&log_root->root_item, log_root->node); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1503 | |
| 1504 | WARN_ON(root->log_root); |
| 1505 | root->log_root = log_root; |
| 1506 | root->log_transid = 0; |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 1507 | root->log_transid_committed = -1; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 1508 | root->last_log_commit = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1509 | return 0; |
| 1510 | } |
| 1511 | |
Stefan Behrens | 35a3621 | 2013-08-14 18:12:25 +0200 | [diff] [blame] | 1512 | static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, |
| 1513 | struct btrfs_key *key) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1514 | { |
| 1515 | struct btrfs_root *root; |
| 1516 | struct btrfs_fs_info *fs_info = tree_root->fs_info; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1517 | struct btrfs_path *path; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1518 | u64 generation; |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1519 | int ret; |
| 1520 | |
| 1521 | path = btrfs_alloc_path(); |
| 1522 | if (!path) |
| 1523 | return ERR_PTR(-ENOMEM); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1524 | |
David Sterba | 74e4d82 | 2016-02-11 11:01:55 +0100 | [diff] [blame] | 1525 | root = btrfs_alloc_root(fs_info, GFP_NOFS); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1526 | if (!root) { |
| 1527 | ret = -ENOMEM; |
| 1528 | goto alloc_fail; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1529 | } |
| 1530 | |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 1531 | __setup_root(tree_root->nodesize, tree_root->sectorsize, |
| 1532 | tree_root->stripesize, root, fs_info, key->objectid); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1533 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1534 | ret = btrfs_find_root(tree_root, key, path, |
| 1535 | &root->root_item, &root->root_key); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1536 | if (ret) { |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1537 | if (ret > 0) |
| 1538 | ret = -ENOENT; |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1539 | goto find_fail; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1540 | } |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1541 | |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1542 | generation = btrfs_root_generation(&root->root_item); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1543 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), |
David Sterba | ce86cd5 | 2014-06-15 01:07:32 +0200 | [diff] [blame] | 1544 | generation); |
Liu Bo | 64c043d | 2015-05-25 17:30:15 +0800 | [diff] [blame] | 1545 | if (IS_ERR(root->node)) { |
| 1546 | ret = PTR_ERR(root->node); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1547 | goto find_fail; |
| 1548 | } else if (!btrfs_buffer_uptodate(root->node, generation, 0)) { |
| 1549 | ret = -EIO; |
Liu Bo | 64c043d | 2015-05-25 17:30:15 +0800 | [diff] [blame] | 1550 | free_extent_buffer(root->node); |
| 1551 | goto find_fail; |
Josef Bacik | 416bc65 | 2013-04-23 14:17:42 -0400 | [diff] [blame] | 1552 | } |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1553 | root->commit_root = btrfs_root_node(root); |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1554 | out: |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1555 | btrfs_free_path(path); |
| 1556 | return root; |
| 1557 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1558 | find_fail: |
| 1559 | kfree(root); |
| 1560 | alloc_fail: |
| 1561 | root = ERR_PTR(ret); |
| 1562 | goto out; |
| 1563 | } |
| 1564 | |
| 1565 | struct btrfs_root *btrfs_read_fs_root(struct btrfs_root *tree_root, |
| 1566 | struct btrfs_key *location) |
| 1567 | { |
| 1568 | struct btrfs_root *root; |
| 1569 | |
| 1570 | root = btrfs_read_tree_root(tree_root, location); |
| 1571 | if (IS_ERR(root)) |
| 1572 | return root; |
| 1573 | |
| 1574 | if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) { |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 1575 | set_bit(BTRFS_ROOT_REF_COWS, &root->state); |
Li Zefan | 08fe4db | 2011-03-28 02:01:25 +0000 | [diff] [blame] | 1576 | btrfs_check_and_init_root_item(&root->root_item); |
| 1577 | } |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1578 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1579 | return root; |
| 1580 | } |
| 1581 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1582 | int btrfs_init_fs_root(struct btrfs_root *root) |
| 1583 | { |
| 1584 | int ret; |
Miao Xie | 8257b2d | 2014-03-06 13:38:19 +0800 | [diff] [blame] | 1585 | struct btrfs_subvolume_writers *writers; |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1586 | |
| 1587 | root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); |
| 1588 | root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), |
| 1589 | GFP_NOFS); |
| 1590 | if (!root->free_ino_pinned || !root->free_ino_ctl) { |
| 1591 | ret = -ENOMEM; |
| 1592 | goto fail; |
| 1593 | } |
| 1594 | |
Miao Xie | 8257b2d | 2014-03-06 13:38:19 +0800 | [diff] [blame] | 1595 | writers = btrfs_alloc_subvolume_writers(); |
| 1596 | if (IS_ERR(writers)) { |
| 1597 | ret = PTR_ERR(writers); |
| 1598 | goto fail; |
| 1599 | } |
| 1600 | root->subv_writers = writers; |
| 1601 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1602 | btrfs_init_free_ino_ctl(root); |
David Sterba | 57cdc8d | 2014-02-05 02:37:48 +0100 | [diff] [blame] | 1603 | spin_lock_init(&root->ino_cache_lock); |
| 1604 | init_waitqueue_head(&root->ino_cache_wait); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1605 | |
| 1606 | ret = get_anon_bdev(&root->anon_dev); |
| 1607 | if (ret) |
Liu Bo | 876d2cf | 2016-06-28 13:44:38 -0700 | [diff] [blame] | 1608 | goto fail; |
Chandan Rajendra | f32e48e | 2016-01-07 18:56:59 +0530 | [diff] [blame] | 1609 | |
| 1610 | mutex_lock(&root->objectid_mutex); |
| 1611 | ret = btrfs_find_highest_objectid(root, |
| 1612 | &root->highest_objectid); |
| 1613 | if (ret) { |
| 1614 | mutex_unlock(&root->objectid_mutex); |
Liu Bo | 876d2cf | 2016-06-28 13:44:38 -0700 | [diff] [blame] | 1615 | goto fail; |
Chandan Rajendra | f32e48e | 2016-01-07 18:56:59 +0530 | [diff] [blame] | 1616 | } |
| 1617 | |
| 1618 | ASSERT(root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); |
| 1619 | |
| 1620 | mutex_unlock(&root->objectid_mutex); |
| 1621 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1622 | return 0; |
| 1623 | fail: |
Liu Bo | 876d2cf | 2016-06-28 13:44:38 -0700 | [diff] [blame] | 1624 | /* the caller is responsible to call free_fs_root */ |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1625 | return ret; |
| 1626 | } |
| 1627 | |
Sergei Trofimovich | 171170c | 2013-08-14 23:27:46 +0300 | [diff] [blame] | 1628 | static struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, |
| 1629 | u64 root_id) |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1630 | { |
| 1631 | struct btrfs_root *root; |
| 1632 | |
| 1633 | spin_lock(&fs_info->fs_roots_radix_lock); |
| 1634 | root = radix_tree_lookup(&fs_info->fs_roots_radix, |
| 1635 | (unsigned long)root_id); |
| 1636 | spin_unlock(&fs_info->fs_roots_radix_lock); |
| 1637 | return root; |
| 1638 | } |
| 1639 | |
| 1640 | int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, |
| 1641 | struct btrfs_root *root) |
| 1642 | { |
| 1643 | int ret; |
| 1644 | |
David Sterba | e1860a7 | 2016-05-09 14:11:38 +0200 | [diff] [blame] | 1645 | ret = radix_tree_preload(GFP_NOFS); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1646 | if (ret) |
| 1647 | return ret; |
| 1648 | |
| 1649 | spin_lock(&fs_info->fs_roots_radix_lock); |
| 1650 | ret = radix_tree_insert(&fs_info->fs_roots_radix, |
| 1651 | (unsigned long)root->root_key.objectid, |
| 1652 | root); |
| 1653 | if (ret == 0) |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 1654 | set_bit(BTRFS_ROOT_IN_RADIX, &root->state); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1655 | spin_unlock(&fs_info->fs_roots_radix_lock); |
| 1656 | radix_tree_preload_end(); |
| 1657 | |
| 1658 | return ret; |
| 1659 | } |
| 1660 | |
Miao Xie | c00869f | 2013-09-25 21:47:44 +0800 | [diff] [blame] | 1661 | struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, |
| 1662 | struct btrfs_key *location, |
| 1663 | bool check_ref) |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1664 | { |
| 1665 | struct btrfs_root *root; |
David Sterba | 381cf65 | 2015-01-02 18:45:16 +0100 | [diff] [blame] | 1666 | struct btrfs_path *path; |
David Sterba | 1d4c08e | 2015-01-02 19:36:14 +0100 | [diff] [blame] | 1667 | struct btrfs_key key; |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1668 | int ret; |
| 1669 | |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1670 | if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) |
| 1671 | return fs_info->tree_root; |
| 1672 | if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) |
| 1673 | return fs_info->extent_root; |
Chris Mason | 8f18cf1 | 2008-04-25 16:53:30 -0400 | [diff] [blame] | 1674 | if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) |
| 1675 | return fs_info->chunk_root; |
| 1676 | if (location->objectid == BTRFS_DEV_TREE_OBJECTID) |
| 1677 | return fs_info->dev_root; |
Yan Zheng | 0403e47 | 2008-12-10 20:32:51 -0500 | [diff] [blame] | 1678 | if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) |
| 1679 | return fs_info->csum_root; |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 1680 | if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) |
| 1681 | return fs_info->quota_root ? fs_info->quota_root : |
| 1682 | ERR_PTR(-ENOENT); |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 1683 | if (location->objectid == BTRFS_UUID_TREE_OBJECTID) |
| 1684 | return fs_info->uuid_root ? fs_info->uuid_root : |
| 1685 | ERR_PTR(-ENOENT); |
Omar Sandoval | 70f6d82 | 2015-09-29 20:50:38 -0700 | [diff] [blame] | 1686 | if (location->objectid == BTRFS_FREE_SPACE_TREE_OBJECTID) |
| 1687 | return fs_info->free_space_root ? fs_info->free_space_root : |
| 1688 | ERR_PTR(-ENOENT); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1689 | again: |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1690 | root = btrfs_lookup_fs_root(fs_info, location->objectid); |
Stefan Behrens | 4847547 | 2013-08-23 10:34:42 +0200 | [diff] [blame] | 1691 | if (root) { |
Miao Xie | c00869f | 2013-09-25 21:47:44 +0800 | [diff] [blame] | 1692 | if (check_ref && btrfs_root_refs(&root->root_item) == 0) |
Stefan Behrens | 4847547 | 2013-08-23 10:34:42 +0200 | [diff] [blame] | 1693 | return ERR_PTR(-ENOENT); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1694 | return root; |
Stefan Behrens | 4847547 | 2013-08-23 10:34:42 +0200 | [diff] [blame] | 1695 | } |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1696 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1697 | root = btrfs_read_fs_root(fs_info->tree_root, location); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1698 | if (IS_ERR(root)) |
| 1699 | return root; |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 1700 | |
Miao Xie | c00869f | 2013-09-25 21:47:44 +0800 | [diff] [blame] | 1701 | if (check_ref && btrfs_root_refs(&root->root_item) == 0) { |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1702 | ret = -ENOENT; |
| 1703 | goto fail; |
| 1704 | } |
| 1705 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1706 | ret = btrfs_init_fs_root(root); |
| 1707 | if (ret) |
| 1708 | goto fail; |
| 1709 | |
David Sterba | 381cf65 | 2015-01-02 18:45:16 +0100 | [diff] [blame] | 1710 | path = btrfs_alloc_path(); |
| 1711 | if (!path) { |
| 1712 | ret = -ENOMEM; |
| 1713 | goto fail; |
| 1714 | } |
David Sterba | 1d4c08e | 2015-01-02 19:36:14 +0100 | [diff] [blame] | 1715 | key.objectid = BTRFS_ORPHAN_OBJECTID; |
| 1716 | key.type = BTRFS_ORPHAN_ITEM_KEY; |
| 1717 | key.offset = location->objectid; |
| 1718 | |
| 1719 | ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0); |
David Sterba | 381cf65 | 2015-01-02 18:45:16 +0100 | [diff] [blame] | 1720 | btrfs_free_path(path); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1721 | if (ret < 0) |
| 1722 | goto fail; |
| 1723 | if (ret == 0) |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 1724 | set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1725 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 1726 | ret = btrfs_insert_fs_root(fs_info, root); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1727 | if (ret) { |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1728 | if (ret == -EEXIST) { |
| 1729 | free_fs_root(root); |
| 1730 | goto again; |
| 1731 | } |
| 1732 | goto fail; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1733 | } |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1734 | return root; |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1735 | fail: |
| 1736 | free_fs_root(root); |
| 1737 | return ERR_PTR(ret); |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1738 | } |
| 1739 | |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1740 | static int btrfs_congested_fn(void *congested_data, int bdi_bits) |
| 1741 | { |
| 1742 | struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; |
| 1743 | int ret = 0; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1744 | struct btrfs_device *device; |
| 1745 | struct backing_dev_info *bdi; |
Chris Mason | b7967db | 2009-04-27 07:29:04 -0400 | [diff] [blame] | 1746 | |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 1747 | rcu_read_lock(); |
| 1748 | list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1749 | if (!device->bdev) |
| 1750 | continue; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1751 | bdi = blk_get_backing_dev_info(device->bdev); |
Tejun Heo | ff9ea32 | 2014-09-08 08:03:56 +0900 | [diff] [blame] | 1752 | if (bdi_congested(bdi, bdi_bits)) { |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1753 | ret = 1; |
| 1754 | break; |
| 1755 | } |
| 1756 | } |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 1757 | rcu_read_unlock(); |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1758 | return ret; |
| 1759 | } |
| 1760 | |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1761 | static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) |
| 1762 | { |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 1763 | int err; |
| 1764 | |
Christoph Hellwig | b4caecd | 2015-01-14 10:42:32 +0100 | [diff] [blame] | 1765 | err = bdi_setup_and_register(bdi, "btrfs"); |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 1766 | if (err) |
| 1767 | return err; |
| 1768 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 1769 | bdi->ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_SIZE; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1770 | bdi->congested_fn = btrfs_congested_fn; |
| 1771 | bdi->congested_data = info; |
Chris Mason | da2f0f7 | 2015-07-02 13:57:22 -0700 | [diff] [blame] | 1772 | bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1773 | return 0; |
| 1774 | } |
| 1775 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1776 | /* |
| 1777 | * called by the kthread helper functions to finally call the bio end_io |
| 1778 | * functions. This is where read checksum verification actually happens |
| 1779 | */ |
| 1780 | static void end_workqueue_fn(struct btrfs_work *work) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1781 | { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1782 | struct bio *bio; |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 1783 | struct btrfs_end_io_wq *end_io_wq; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1784 | |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 1785 | end_io_wq = container_of(work, struct btrfs_end_io_wq, work); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1786 | bio = end_io_wq->bio; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1787 | |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 1788 | bio->bi_error = end_io_wq->error; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1789 | bio->bi_private = end_io_wq->private; |
| 1790 | bio->bi_end_io = end_io_wq->end_io; |
David Sterba | 97eb6b6 | 2014-07-30 00:55:42 +0200 | [diff] [blame] | 1791 | kmem_cache_free(btrfs_end_io_wq_cache, end_io_wq); |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 1792 | bio_endio(bio); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 1793 | } |
| 1794 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1795 | static int cleaner_kthread(void *arg) |
| 1796 | { |
| 1797 | struct btrfs_root *root = arg; |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1798 | int again; |
Filipe Manana | da288d2 | 2015-06-13 06:55:31 +0100 | [diff] [blame] | 1799 | struct btrfs_trans_handle *trans; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1800 | |
| 1801 | do { |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1802 | again = 0; |
David Sterba | 9d1a2a3 | 2013-03-12 15:13:28 +0000 | [diff] [blame] | 1803 | |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1804 | /* Make the cleaner go to sleep early. */ |
Miao Xie | babbf170 | 2013-05-14 10:20:43 +0000 | [diff] [blame] | 1805 | if (btrfs_need_cleaner_sleep(root)) |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1806 | goto sleep; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1807 | |
Zygo Blaxell | 90c711a | 2016-06-12 23:39:58 -0400 | [diff] [blame] | 1808 | /* |
| 1809 | * Do not do anything if we might cause open_ctree() to block |
| 1810 | * before we have finished mounting the filesystem. |
| 1811 | */ |
| 1812 | if (!root->fs_info->open) |
| 1813 | goto sleep; |
| 1814 | |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1815 | if (!mutex_trylock(&root->fs_info->cleaner_mutex)) |
| 1816 | goto sleep; |
| 1817 | |
Miao Xie | dc7f370 | 2013-05-14 10:20:42 +0000 | [diff] [blame] | 1818 | /* |
| 1819 | * Avoid the problem that we change the status of the fs |
| 1820 | * during the above check and trylock. |
| 1821 | */ |
Miao Xie | babbf170 | 2013-05-14 10:20:43 +0000 | [diff] [blame] | 1822 | if (btrfs_need_cleaner_sleep(root)) { |
Miao Xie | dc7f370 | 2013-05-14 10:20:42 +0000 | [diff] [blame] | 1823 | mutex_unlock(&root->fs_info->cleaner_mutex); |
| 1824 | goto sleep; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1825 | } |
| 1826 | |
Filipe Manana | c2d6cb1 | 2016-01-15 11:05:12 +0000 | [diff] [blame] | 1827 | mutex_lock(&root->fs_info->cleaner_delayed_iput_mutex); |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1828 | btrfs_run_delayed_iputs(root); |
Filipe Manana | c2d6cb1 | 2016-01-15 11:05:12 +0000 | [diff] [blame] | 1829 | mutex_unlock(&root->fs_info->cleaner_delayed_iput_mutex); |
| 1830 | |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1831 | again = btrfs_clean_one_deleted_snapshot(root); |
| 1832 | mutex_unlock(&root->fs_info->cleaner_mutex); |
| 1833 | |
| 1834 | /* |
Miao Xie | 05323cd | 2013-05-14 10:20:41 +0000 | [diff] [blame] | 1835 | * The defragger has dealt with the R/O remount and umount, |
| 1836 | * needn't do anything special here. |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1837 | */ |
| 1838 | btrfs_run_defrag_inodes(root->fs_info); |
Filipe Manana | 67c5e7d | 2015-06-11 00:58:53 +0100 | [diff] [blame] | 1839 | |
| 1840 | /* |
| 1841 | * Acquires fs_info->delete_unused_bgs_mutex to avoid racing |
| 1842 | * with relocation (btrfs_relocate_chunk) and relocation |
| 1843 | * acquires fs_info->cleaner_mutex (btrfs_relocate_block_group) |
| 1844 | * after acquiring fs_info->delete_unused_bgs_mutex. So we |
| 1845 | * can't hold, nor need to, fs_info->cleaner_mutex when deleting |
| 1846 | * unused block groups. |
| 1847 | */ |
| 1848 | btrfs_delete_unused_bgs(root->fs_info); |
Miao Xie | d027824 | 2013-05-14 10:20:40 +0000 | [diff] [blame] | 1849 | sleep: |
Jiri Kosina | 838fe18 | 2016-03-15 11:28:54 +0100 | [diff] [blame] | 1850 | if (!again) { |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1851 | set_current_state(TASK_INTERRUPTIBLE); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1852 | if (!kthread_should_stop()) |
| 1853 | schedule(); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1854 | __set_current_state(TASK_RUNNING); |
| 1855 | } |
| 1856 | } while (!kthread_should_stop()); |
Filipe Manana | da288d2 | 2015-06-13 06:55:31 +0100 | [diff] [blame] | 1857 | |
| 1858 | /* |
| 1859 | * Transaction kthread is stopped before us and wakes us up. |
| 1860 | * However we might have started a new transaction and COWed some |
| 1861 | * tree blocks when deleting unused block groups for example. So |
| 1862 | * make sure we commit the transaction we started to have a clean |
| 1863 | * shutdown when evicting the btree inode - if it has dirty pages |
| 1864 | * when we do the final iput() on it, eviction will trigger a |
| 1865 | * writeback for it which will fail with null pointer dereferences |
| 1866 | * since work queues and other resources were already released and |
| 1867 | * destroyed by the time the iput/eviction/writeback is made. |
| 1868 | */ |
| 1869 | trans = btrfs_attach_transaction(root); |
| 1870 | if (IS_ERR(trans)) { |
| 1871 | if (PTR_ERR(trans) != -ENOENT) |
| 1872 | btrfs_err(root->fs_info, |
| 1873 | "cleaner transaction attach returned %ld", |
| 1874 | PTR_ERR(trans)); |
| 1875 | } else { |
| 1876 | int ret; |
| 1877 | |
| 1878 | ret = btrfs_commit_transaction(trans, root); |
| 1879 | if (ret) |
| 1880 | btrfs_err(root->fs_info, |
| 1881 | "cleaner open transaction commit returned %d", |
| 1882 | ret); |
| 1883 | } |
| 1884 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1885 | return 0; |
| 1886 | } |
| 1887 | |
| 1888 | static int transaction_kthread(void *arg) |
| 1889 | { |
| 1890 | struct btrfs_root *root = arg; |
| 1891 | struct btrfs_trans_handle *trans; |
| 1892 | struct btrfs_transaction *cur; |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1893 | u64 transid; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1894 | unsigned long now; |
| 1895 | unsigned long delay; |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1896 | bool cannot_commit; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1897 | |
| 1898 | do { |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1899 | cannot_commit = false; |
David Sterba | 8b87dc1 | 2013-08-01 18:14:52 +0200 | [diff] [blame] | 1900 | delay = HZ * root->fs_info->commit_interval; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1901 | mutex_lock(&root->fs_info->transaction_kthread_mutex); |
| 1902 | |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1903 | spin_lock(&root->fs_info->trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1904 | cur = root->fs_info->running_transaction; |
| 1905 | if (!cur) { |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1906 | spin_unlock(&root->fs_info->trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1907 | goto sleep; |
| 1908 | } |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1909 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1910 | now = get_seconds(); |
Miao Xie | 4a9d8bd | 2013-05-17 03:53:43 +0000 | [diff] [blame] | 1911 | if (cur->state < TRANS_STATE_BLOCKED && |
David Sterba | 8b87dc1 | 2013-08-01 18:14:52 +0200 | [diff] [blame] | 1912 | (now < cur->start_time || |
| 1913 | now - cur->start_time < root->fs_info->commit_interval)) { |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1914 | spin_unlock(&root->fs_info->trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1915 | delay = HZ * 5; |
| 1916 | goto sleep; |
| 1917 | } |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1918 | transid = cur->transid; |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1919 | spin_unlock(&root->fs_info->trans_lock); |
Chris Mason | 56bec29 | 2009-03-13 10:10:06 -0400 | [diff] [blame] | 1920 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 1921 | /* If the file system is aborted, this will always fail. */ |
Miao Xie | 354aa0f | 2012-09-20 01:54:00 -0600 | [diff] [blame] | 1922 | trans = btrfs_attach_transaction(root); |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1923 | if (IS_ERR(trans)) { |
Miao Xie | 354aa0f | 2012-09-20 01:54:00 -0600 | [diff] [blame] | 1924 | if (PTR_ERR(trans) != -ENOENT) |
| 1925 | cannot_commit = true; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 1926 | goto sleep; |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1927 | } |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1928 | if (transid == trans->transid) { |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 1929 | btrfs_commit_transaction(trans, root); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1930 | } else { |
| 1931 | btrfs_end_transaction(trans, root); |
| 1932 | } |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1933 | sleep: |
| 1934 | wake_up_process(root->fs_info->cleaner_kthread); |
| 1935 | mutex_unlock(&root->fs_info->transaction_kthread_mutex); |
| 1936 | |
Josef Bacik | 4e121c0 | 2013-09-27 16:32:39 -0400 | [diff] [blame] | 1937 | if (unlikely(test_bit(BTRFS_FS_STATE_ERROR, |
| 1938 | &root->fs_info->fs_state))) |
| 1939 | btrfs_cleanup_transaction(root); |
Jiri Kosina | ce63f89 | 2016-03-15 11:28:59 +0100 | [diff] [blame] | 1940 | set_current_state(TASK_INTERRUPTIBLE); |
| 1941 | if (!kthread_should_stop() && |
| 1942 | (!btrfs_transaction_blocked(root->fs_info) || |
| 1943 | cannot_commit)) |
| 1944 | schedule_timeout(delay); |
| 1945 | __set_current_state(TASK_RUNNING); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1946 | } while (!kthread_should_stop()); |
| 1947 | return 0; |
| 1948 | } |
| 1949 | |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1950 | /* |
| 1951 | * this will find the highest generation in the array of |
| 1952 | * root backups. The index of the highest array is returned, |
| 1953 | * or -1 if we can't find anything. |
| 1954 | * |
| 1955 | * We check to make sure the array is valid by comparing the |
| 1956 | * generation of the latest root in the array with the generation |
| 1957 | * in the super block. If they don't match we pitch it. |
| 1958 | */ |
| 1959 | static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) |
| 1960 | { |
| 1961 | u64 cur; |
| 1962 | int newest_index = -1; |
| 1963 | struct btrfs_root_backup *root_backup; |
| 1964 | int i; |
| 1965 | |
| 1966 | for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { |
| 1967 | root_backup = info->super_copy->super_roots + i; |
| 1968 | cur = btrfs_backup_tree_root_gen(root_backup); |
| 1969 | if (cur == newest_gen) |
| 1970 | newest_index = i; |
| 1971 | } |
| 1972 | |
| 1973 | /* check to see if we actually wrapped around */ |
| 1974 | if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { |
| 1975 | root_backup = info->super_copy->super_roots; |
| 1976 | cur = btrfs_backup_tree_root_gen(root_backup); |
| 1977 | if (cur == newest_gen) |
| 1978 | newest_index = 0; |
| 1979 | } |
| 1980 | return newest_index; |
| 1981 | } |
| 1982 | |
| 1983 | |
| 1984 | /* |
| 1985 | * find the oldest backup so we know where to store new entries |
| 1986 | * in the backup array. This will set the backup_root_index |
| 1987 | * field in the fs_info struct |
| 1988 | */ |
| 1989 | static void find_oldest_super_backup(struct btrfs_fs_info *info, |
| 1990 | u64 newest_gen) |
| 1991 | { |
| 1992 | int newest_index = -1; |
| 1993 | |
| 1994 | newest_index = find_newest_super_backup(info, newest_gen); |
| 1995 | /* if there was garbage in there, just move along */ |
| 1996 | if (newest_index == -1) { |
| 1997 | info->backup_root_index = 0; |
| 1998 | } else { |
| 1999 | info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; |
| 2000 | } |
| 2001 | } |
| 2002 | |
| 2003 | /* |
| 2004 | * copy all the root pointers into the super backup array. |
| 2005 | * this will bump the backup pointer by one when it is |
| 2006 | * done |
| 2007 | */ |
| 2008 | static void backup_super_roots(struct btrfs_fs_info *info) |
| 2009 | { |
| 2010 | int next_backup; |
| 2011 | struct btrfs_root_backup *root_backup; |
| 2012 | int last_backup; |
| 2013 | |
| 2014 | next_backup = info->backup_root_index; |
| 2015 | last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % |
| 2016 | BTRFS_NUM_BACKUP_ROOTS; |
| 2017 | |
| 2018 | /* |
| 2019 | * just overwrite the last backup if we're at the same generation |
| 2020 | * this happens only at umount |
| 2021 | */ |
| 2022 | root_backup = info->super_for_commit->super_roots + last_backup; |
| 2023 | if (btrfs_backup_tree_root_gen(root_backup) == |
| 2024 | btrfs_header_generation(info->tree_root->node)) |
| 2025 | next_backup = last_backup; |
| 2026 | |
| 2027 | root_backup = info->super_for_commit->super_roots + next_backup; |
| 2028 | |
| 2029 | /* |
| 2030 | * make sure all of our padding and empty slots get zero filled |
| 2031 | * regardless of which ones we use today |
| 2032 | */ |
| 2033 | memset(root_backup, 0, sizeof(*root_backup)); |
| 2034 | |
| 2035 | info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; |
| 2036 | |
| 2037 | btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); |
| 2038 | btrfs_set_backup_tree_root_gen(root_backup, |
| 2039 | btrfs_header_generation(info->tree_root->node)); |
| 2040 | |
| 2041 | btrfs_set_backup_tree_root_level(root_backup, |
| 2042 | btrfs_header_level(info->tree_root->node)); |
| 2043 | |
| 2044 | btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); |
| 2045 | btrfs_set_backup_chunk_root_gen(root_backup, |
| 2046 | btrfs_header_generation(info->chunk_root->node)); |
| 2047 | btrfs_set_backup_chunk_root_level(root_backup, |
| 2048 | btrfs_header_level(info->chunk_root->node)); |
| 2049 | |
| 2050 | btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); |
| 2051 | btrfs_set_backup_extent_root_gen(root_backup, |
| 2052 | btrfs_header_generation(info->extent_root->node)); |
| 2053 | btrfs_set_backup_extent_root_level(root_backup, |
| 2054 | btrfs_header_level(info->extent_root->node)); |
| 2055 | |
Chris Mason | 7c7e82a | 2011-11-06 18:50:56 -0500 | [diff] [blame] | 2056 | /* |
| 2057 | * we might commit during log recovery, which happens before we set |
| 2058 | * the fs_root. Make sure it is valid before we fill it in. |
| 2059 | */ |
| 2060 | if (info->fs_root && info->fs_root->node) { |
| 2061 | btrfs_set_backup_fs_root(root_backup, |
| 2062 | info->fs_root->node->start); |
| 2063 | btrfs_set_backup_fs_root_gen(root_backup, |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2064 | btrfs_header_generation(info->fs_root->node)); |
Chris Mason | 7c7e82a | 2011-11-06 18:50:56 -0500 | [diff] [blame] | 2065 | btrfs_set_backup_fs_root_level(root_backup, |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2066 | btrfs_header_level(info->fs_root->node)); |
Chris Mason | 7c7e82a | 2011-11-06 18:50:56 -0500 | [diff] [blame] | 2067 | } |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2068 | |
| 2069 | btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); |
| 2070 | btrfs_set_backup_dev_root_gen(root_backup, |
| 2071 | btrfs_header_generation(info->dev_root->node)); |
| 2072 | btrfs_set_backup_dev_root_level(root_backup, |
| 2073 | btrfs_header_level(info->dev_root->node)); |
| 2074 | |
| 2075 | btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); |
| 2076 | btrfs_set_backup_csum_root_gen(root_backup, |
| 2077 | btrfs_header_generation(info->csum_root->node)); |
| 2078 | btrfs_set_backup_csum_root_level(root_backup, |
| 2079 | btrfs_header_level(info->csum_root->node)); |
| 2080 | |
| 2081 | btrfs_set_backup_total_bytes(root_backup, |
| 2082 | btrfs_super_total_bytes(info->super_copy)); |
| 2083 | btrfs_set_backup_bytes_used(root_backup, |
| 2084 | btrfs_super_bytes_used(info->super_copy)); |
| 2085 | btrfs_set_backup_num_devices(root_backup, |
| 2086 | btrfs_super_num_devices(info->super_copy)); |
| 2087 | |
| 2088 | /* |
| 2089 | * if we don't copy this out to the super_copy, it won't get remembered |
| 2090 | * for the next commit |
| 2091 | */ |
| 2092 | memcpy(&info->super_copy->super_roots, |
| 2093 | &info->super_for_commit->super_roots, |
| 2094 | sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); |
| 2095 | } |
| 2096 | |
| 2097 | /* |
| 2098 | * this copies info out of the root backup array and back into |
| 2099 | * the in-memory super block. It is meant to help iterate through |
| 2100 | * the array, so you send it the number of backups you've already |
| 2101 | * tried and the last backup index you used. |
| 2102 | * |
| 2103 | * this returns -1 when it has tried all the backups |
| 2104 | */ |
| 2105 | static noinline int next_root_backup(struct btrfs_fs_info *info, |
| 2106 | struct btrfs_super_block *super, |
| 2107 | int *num_backups_tried, int *backup_index) |
| 2108 | { |
| 2109 | struct btrfs_root_backup *root_backup; |
| 2110 | int newest = *backup_index; |
| 2111 | |
| 2112 | if (*num_backups_tried == 0) { |
| 2113 | u64 gen = btrfs_super_generation(super); |
| 2114 | |
| 2115 | newest = find_newest_super_backup(info, gen); |
| 2116 | if (newest == -1) |
| 2117 | return -1; |
| 2118 | |
| 2119 | *backup_index = newest; |
| 2120 | *num_backups_tried = 1; |
| 2121 | } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { |
| 2122 | /* we've tried all the backups, all done */ |
| 2123 | return -1; |
| 2124 | } else { |
| 2125 | /* jump to the next oldest backup */ |
| 2126 | newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % |
| 2127 | BTRFS_NUM_BACKUP_ROOTS; |
| 2128 | *backup_index = newest; |
| 2129 | *num_backups_tried += 1; |
| 2130 | } |
| 2131 | root_backup = super->super_roots + newest; |
| 2132 | |
| 2133 | btrfs_set_super_generation(super, |
| 2134 | btrfs_backup_tree_root_gen(root_backup)); |
| 2135 | btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); |
| 2136 | btrfs_set_super_root_level(super, |
| 2137 | btrfs_backup_tree_root_level(root_backup)); |
| 2138 | btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); |
| 2139 | |
| 2140 | /* |
| 2141 | * fixme: the total bytes and num_devices need to match or we should |
| 2142 | * need a fsck |
| 2143 | */ |
| 2144 | btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); |
| 2145 | btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); |
| 2146 | return 0; |
| 2147 | } |
| 2148 | |
Liu Bo | 7abadb6 | 2013-03-17 02:10:31 +0000 | [diff] [blame] | 2149 | /* helper to cleanup workers */ |
| 2150 | static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) |
| 2151 | { |
Qu Wenruo | dc6e320 | 2014-02-28 10:46:14 +0800 | [diff] [blame] | 2152 | btrfs_destroy_workqueue(fs_info->fixup_workers); |
Qu Wenruo | afe3d24 | 2014-02-28 10:46:07 +0800 | [diff] [blame] | 2153 | btrfs_destroy_workqueue(fs_info->delalloc_workers); |
Qu Wenruo | 5cdc7ad3 | 2014-02-28 10:46:06 +0800 | [diff] [blame] | 2154 | btrfs_destroy_workqueue(fs_info->workers); |
Qu Wenruo | fccb5d8 | 2014-02-28 10:46:10 +0800 | [diff] [blame] | 2155 | btrfs_destroy_workqueue(fs_info->endio_workers); |
| 2156 | btrfs_destroy_workqueue(fs_info->endio_meta_workers); |
| 2157 | btrfs_destroy_workqueue(fs_info->endio_raid56_workers); |
Miao Xie | 8b110e3 | 2014-09-12 18:44:03 +0800 | [diff] [blame] | 2158 | btrfs_destroy_workqueue(fs_info->endio_repair_workers); |
Qu Wenruo | d05a33a | 2014-02-28 10:46:11 +0800 | [diff] [blame] | 2159 | btrfs_destroy_workqueue(fs_info->rmw_workers); |
Qu Wenruo | fccb5d8 | 2014-02-28 10:46:10 +0800 | [diff] [blame] | 2160 | btrfs_destroy_workqueue(fs_info->endio_meta_write_workers); |
| 2161 | btrfs_destroy_workqueue(fs_info->endio_write_workers); |
| 2162 | btrfs_destroy_workqueue(fs_info->endio_freespace_worker); |
Qu Wenruo | a8c93d4 | 2014-02-28 10:46:08 +0800 | [diff] [blame] | 2163 | btrfs_destroy_workqueue(fs_info->submit_workers); |
Qu Wenruo | 5b3bc44 | 2014-02-28 10:46:15 +0800 | [diff] [blame] | 2164 | btrfs_destroy_workqueue(fs_info->delayed_workers); |
Qu Wenruo | e66f0bb | 2014-02-28 10:46:12 +0800 | [diff] [blame] | 2165 | btrfs_destroy_workqueue(fs_info->caching_workers); |
Qu Wenruo | 736cfa1 | 2014-02-28 10:46:13 +0800 | [diff] [blame] | 2166 | btrfs_destroy_workqueue(fs_info->readahead_workers); |
Qu Wenruo | a44903a | 2014-02-28 10:46:09 +0800 | [diff] [blame] | 2167 | btrfs_destroy_workqueue(fs_info->flush_workers); |
Qu Wenruo | fc97fab | 2014-02-28 10:46:16 +0800 | [diff] [blame] | 2168 | btrfs_destroy_workqueue(fs_info->qgroup_rescan_workers); |
Chris Mason | a79b7d4 | 2014-05-22 16:18:52 -0700 | [diff] [blame] | 2169 | btrfs_destroy_workqueue(fs_info->extent_workers); |
Liu Bo | 7abadb6 | 2013-03-17 02:10:31 +0000 | [diff] [blame] | 2170 | } |
| 2171 | |
Rashika | 2e9f595 | 2013-10-31 02:45:20 +0530 | [diff] [blame] | 2172 | static void free_root_extent_buffers(struct btrfs_root *root) |
| 2173 | { |
| 2174 | if (root) { |
| 2175 | free_extent_buffer(root->node); |
| 2176 | free_extent_buffer(root->commit_root); |
| 2177 | root->node = NULL; |
| 2178 | root->commit_root = NULL; |
| 2179 | } |
| 2180 | } |
| 2181 | |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2182 | /* helper to cleanup tree roots */ |
| 2183 | static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) |
| 2184 | { |
Rashika | 2e9f595 | 2013-10-31 02:45:20 +0530 | [diff] [blame] | 2185 | free_root_extent_buffers(info->tree_root); |
Josef Bacik | 655b09f | 2013-05-17 14:06:51 -0400 | [diff] [blame] | 2186 | |
Rashika | 2e9f595 | 2013-10-31 02:45:20 +0530 | [diff] [blame] | 2187 | free_root_extent_buffers(info->dev_root); |
| 2188 | free_root_extent_buffers(info->extent_root); |
| 2189 | free_root_extent_buffers(info->csum_root); |
| 2190 | free_root_extent_buffers(info->quota_root); |
| 2191 | free_root_extent_buffers(info->uuid_root); |
| 2192 | if (chunk_root) |
| 2193 | free_root_extent_buffers(info->chunk_root); |
Omar Sandoval | 70f6d82 | 2015-09-29 20:50:38 -0700 | [diff] [blame] | 2194 | free_root_extent_buffers(info->free_space_root); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2195 | } |
| 2196 | |
Josef Bacik | faa2dbf | 2014-05-07 17:06:09 -0400 | [diff] [blame] | 2197 | void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info) |
Josef Bacik | 171f653 | 2013-04-24 16:35:41 -0400 | [diff] [blame] | 2198 | { |
| 2199 | int ret; |
| 2200 | struct btrfs_root *gang[8]; |
| 2201 | int i; |
| 2202 | |
| 2203 | while (!list_empty(&fs_info->dead_roots)) { |
| 2204 | gang[0] = list_entry(fs_info->dead_roots.next, |
| 2205 | struct btrfs_root, root_list); |
| 2206 | list_del(&gang[0]->root_list); |
| 2207 | |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 2208 | if (test_bit(BTRFS_ROOT_IN_RADIX, &gang[0]->state)) { |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2209 | btrfs_drop_and_free_fs_root(fs_info, gang[0]); |
Josef Bacik | 171f653 | 2013-04-24 16:35:41 -0400 | [diff] [blame] | 2210 | } else { |
| 2211 | free_extent_buffer(gang[0]->node); |
| 2212 | free_extent_buffer(gang[0]->commit_root); |
Miao Xie | b0feb9d | 2013-05-15 07:48:20 +0000 | [diff] [blame] | 2213 | btrfs_put_fs_root(gang[0]); |
Josef Bacik | 171f653 | 2013-04-24 16:35:41 -0400 | [diff] [blame] | 2214 | } |
| 2215 | } |
| 2216 | |
| 2217 | while (1) { |
| 2218 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
| 2219 | (void **)gang, 0, |
| 2220 | ARRAY_SIZE(gang)); |
| 2221 | if (!ret) |
| 2222 | break; |
| 2223 | for (i = 0; i < ret; i++) |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2224 | btrfs_drop_and_free_fs_root(fs_info, gang[i]); |
Josef Bacik | 171f653 | 2013-04-24 16:35:41 -0400 | [diff] [blame] | 2225 | } |
Liu Bo | 1a4319c | 2014-01-13 19:53:53 +0800 | [diff] [blame] | 2226 | |
| 2227 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { |
| 2228 | btrfs_free_log_root_tree(NULL, fs_info); |
| 2229 | btrfs_destroy_pinned_extent(fs_info->tree_root, |
| 2230 | fs_info->pinned_extents); |
| 2231 | } |
Josef Bacik | 171f653 | 2013-04-24 16:35:41 -0400 | [diff] [blame] | 2232 | } |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2233 | |
Eric Sandeen | 638aa7e | 2014-08-01 18:12:38 -0500 | [diff] [blame] | 2234 | static void btrfs_init_scrub(struct btrfs_fs_info *fs_info) |
| 2235 | { |
| 2236 | mutex_init(&fs_info->scrub_lock); |
| 2237 | atomic_set(&fs_info->scrubs_running, 0); |
| 2238 | atomic_set(&fs_info->scrub_pause_req, 0); |
| 2239 | atomic_set(&fs_info->scrubs_paused, 0); |
| 2240 | atomic_set(&fs_info->scrub_cancel_req, 0); |
| 2241 | init_waitqueue_head(&fs_info->scrub_pause_wait); |
| 2242 | fs_info->scrub_workers_refcnt = 0; |
| 2243 | } |
| 2244 | |
Eric Sandeen | 779a65a | 2014-08-01 18:12:39 -0500 | [diff] [blame] | 2245 | static void btrfs_init_balance(struct btrfs_fs_info *fs_info) |
| 2246 | { |
| 2247 | spin_lock_init(&fs_info->balance_lock); |
| 2248 | mutex_init(&fs_info->balance_mutex); |
| 2249 | atomic_set(&fs_info->balance_running, 0); |
| 2250 | atomic_set(&fs_info->balance_pause_req, 0); |
| 2251 | atomic_set(&fs_info->balance_cancel_req, 0); |
| 2252 | fs_info->balance_ctl = NULL; |
| 2253 | init_waitqueue_head(&fs_info->balance_wait_q); |
| 2254 | } |
| 2255 | |
Eric Sandeen | f37938e | 2014-08-01 18:12:40 -0500 | [diff] [blame] | 2256 | static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info, |
| 2257 | struct btrfs_root *tree_root) |
| 2258 | { |
| 2259 | fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; |
| 2260 | set_nlink(fs_info->btree_inode, 1); |
| 2261 | /* |
| 2262 | * we set the i_size on the btree inode to the max possible int. |
| 2263 | * the real end of the address space is determined by all of |
| 2264 | * the devices in the system |
| 2265 | */ |
| 2266 | fs_info->btree_inode->i_size = OFFSET_MAX; |
| 2267 | fs_info->btree_inode->i_mapping->a_ops = &btree_aops; |
Eric Sandeen | f37938e | 2014-08-01 18:12:40 -0500 | [diff] [blame] | 2268 | |
| 2269 | RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); |
| 2270 | extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, |
| 2271 | fs_info->btree_inode->i_mapping); |
| 2272 | BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; |
| 2273 | extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); |
| 2274 | |
| 2275 | BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; |
| 2276 | |
| 2277 | BTRFS_I(fs_info->btree_inode)->root = tree_root; |
| 2278 | memset(&BTRFS_I(fs_info->btree_inode)->location, 0, |
| 2279 | sizeof(struct btrfs_key)); |
| 2280 | set_bit(BTRFS_INODE_DUMMY, |
| 2281 | &BTRFS_I(fs_info->btree_inode)->runtime_flags); |
| 2282 | btrfs_insert_inode_hash(fs_info->btree_inode); |
| 2283 | } |
| 2284 | |
Eric Sandeen | ad61836 | 2014-08-01 18:12:41 -0500 | [diff] [blame] | 2285 | static void btrfs_init_dev_replace_locks(struct btrfs_fs_info *fs_info) |
| 2286 | { |
| 2287 | fs_info->dev_replace.lock_owner = 0; |
| 2288 | atomic_set(&fs_info->dev_replace.nesting_level, 0); |
| 2289 | mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); |
Liu Bo | 73beece | 2015-07-17 16:49:19 +0800 | [diff] [blame] | 2290 | rwlock_init(&fs_info->dev_replace.lock); |
| 2291 | atomic_set(&fs_info->dev_replace.read_locks, 0); |
| 2292 | atomic_set(&fs_info->dev_replace.blocking_readers, 0); |
Eric Sandeen | ad61836 | 2014-08-01 18:12:41 -0500 | [diff] [blame] | 2293 | init_waitqueue_head(&fs_info->replace_wait); |
Liu Bo | 73beece | 2015-07-17 16:49:19 +0800 | [diff] [blame] | 2294 | init_waitqueue_head(&fs_info->dev_replace.read_lock_wq); |
Eric Sandeen | ad61836 | 2014-08-01 18:12:41 -0500 | [diff] [blame] | 2295 | } |
| 2296 | |
Eric Sandeen | f9e92e4 | 2014-08-01 18:12:42 -0500 | [diff] [blame] | 2297 | static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info) |
| 2298 | { |
| 2299 | spin_lock_init(&fs_info->qgroup_lock); |
| 2300 | mutex_init(&fs_info->qgroup_ioctl_lock); |
| 2301 | fs_info->qgroup_tree = RB_ROOT; |
| 2302 | fs_info->qgroup_op_tree = RB_ROOT; |
| 2303 | INIT_LIST_HEAD(&fs_info->dirty_qgroups); |
| 2304 | fs_info->qgroup_seq = 1; |
| 2305 | fs_info->quota_enabled = 0; |
| 2306 | fs_info->pending_quota_state = 0; |
| 2307 | fs_info->qgroup_ulist = NULL; |
| 2308 | mutex_init(&fs_info->qgroup_rescan_lock); |
| 2309 | } |
| 2310 | |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2311 | static int btrfs_init_workqueues(struct btrfs_fs_info *fs_info, |
| 2312 | struct btrfs_fs_devices *fs_devices) |
| 2313 | { |
| 2314 | int max_active = fs_info->thread_pool_size; |
David Sterba | 6f01105 | 2015-02-16 18:34:01 +0100 | [diff] [blame] | 2315 | unsigned int flags = WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND; |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2316 | |
| 2317 | fs_info->workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2318 | btrfs_alloc_workqueue(fs_info, "worker", |
| 2319 | flags | WQ_HIGHPRI, max_active, 16); |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2320 | |
| 2321 | fs_info->delalloc_workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2322 | btrfs_alloc_workqueue(fs_info, "delalloc", |
| 2323 | flags, max_active, 2); |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2324 | |
| 2325 | fs_info->flush_workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2326 | btrfs_alloc_workqueue(fs_info, "flush_delalloc", |
| 2327 | flags, max_active, 0); |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2328 | |
| 2329 | fs_info->caching_workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2330 | btrfs_alloc_workqueue(fs_info, "cache", flags, max_active, 0); |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2331 | |
| 2332 | /* |
| 2333 | * a higher idle thresh on the submit workers makes it much more |
| 2334 | * likely that bios will be send down in a sane order to the |
| 2335 | * devices |
| 2336 | */ |
| 2337 | fs_info->submit_workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2338 | btrfs_alloc_workqueue(fs_info, "submit", flags, |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2339 | min_t(u64, fs_devices->num_devices, |
| 2340 | max_active), 64); |
| 2341 | |
| 2342 | fs_info->fixup_workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2343 | btrfs_alloc_workqueue(fs_info, "fixup", flags, 1, 0); |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2344 | |
| 2345 | /* |
| 2346 | * endios are largely parallel and should have a very |
| 2347 | * low idle thresh |
| 2348 | */ |
| 2349 | fs_info->endio_workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2350 | btrfs_alloc_workqueue(fs_info, "endio", flags, max_active, 4); |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2351 | fs_info->endio_meta_workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2352 | btrfs_alloc_workqueue(fs_info, "endio-meta", flags, |
| 2353 | max_active, 4); |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2354 | fs_info->endio_meta_write_workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2355 | btrfs_alloc_workqueue(fs_info, "endio-meta-write", flags, |
| 2356 | max_active, 2); |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2357 | fs_info->endio_raid56_workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2358 | btrfs_alloc_workqueue(fs_info, "endio-raid56", flags, |
| 2359 | max_active, 4); |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2360 | fs_info->endio_repair_workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2361 | btrfs_alloc_workqueue(fs_info, "endio-repair", flags, 1, 0); |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2362 | fs_info->rmw_workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2363 | btrfs_alloc_workqueue(fs_info, "rmw", flags, max_active, 2); |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2364 | fs_info->endio_write_workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2365 | btrfs_alloc_workqueue(fs_info, "endio-write", flags, |
| 2366 | max_active, 2); |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2367 | fs_info->endio_freespace_worker = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2368 | btrfs_alloc_workqueue(fs_info, "freespace-write", flags, |
| 2369 | max_active, 0); |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2370 | fs_info->delayed_workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2371 | btrfs_alloc_workqueue(fs_info, "delayed-meta", flags, |
| 2372 | max_active, 0); |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2373 | fs_info->readahead_workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2374 | btrfs_alloc_workqueue(fs_info, "readahead", flags, |
| 2375 | max_active, 2); |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2376 | fs_info->qgroup_rescan_workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2377 | btrfs_alloc_workqueue(fs_info, "qgroup-rescan", flags, 1, 0); |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2378 | fs_info->extent_workers = |
Jeff Mahoney | cb00109 | 2016-06-09 16:22:11 -0400 | [diff] [blame] | 2379 | btrfs_alloc_workqueue(fs_info, "extent-refs", flags, |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2380 | min_t(u64, fs_devices->num_devices, |
| 2381 | max_active), 8); |
| 2382 | |
| 2383 | if (!(fs_info->workers && fs_info->delalloc_workers && |
| 2384 | fs_info->submit_workers && fs_info->flush_workers && |
| 2385 | fs_info->endio_workers && fs_info->endio_meta_workers && |
| 2386 | fs_info->endio_meta_write_workers && |
| 2387 | fs_info->endio_repair_workers && |
| 2388 | fs_info->endio_write_workers && fs_info->endio_raid56_workers && |
| 2389 | fs_info->endio_freespace_worker && fs_info->rmw_workers && |
| 2390 | fs_info->caching_workers && fs_info->readahead_workers && |
| 2391 | fs_info->fixup_workers && fs_info->delayed_workers && |
| 2392 | fs_info->extent_workers && |
| 2393 | fs_info->qgroup_rescan_workers)) { |
| 2394 | return -ENOMEM; |
| 2395 | } |
| 2396 | |
| 2397 | return 0; |
| 2398 | } |
| 2399 | |
Eric Sandeen | 63443bf | 2014-08-01 18:12:46 -0500 | [diff] [blame] | 2400 | static int btrfs_replay_log(struct btrfs_fs_info *fs_info, |
| 2401 | struct btrfs_fs_devices *fs_devices) |
| 2402 | { |
| 2403 | int ret; |
| 2404 | struct btrfs_root *tree_root = fs_info->tree_root; |
| 2405 | struct btrfs_root *log_tree_root; |
| 2406 | struct btrfs_super_block *disk_super = fs_info->super_copy; |
| 2407 | u64 bytenr = btrfs_super_log_root(disk_super); |
| 2408 | |
| 2409 | if (fs_devices->rw_devices == 0) { |
David Sterba | f14d104 | 2015-10-08 11:37:06 +0200 | [diff] [blame] | 2410 | btrfs_warn(fs_info, "log replay required on RO media"); |
Eric Sandeen | 63443bf | 2014-08-01 18:12:46 -0500 | [diff] [blame] | 2411 | return -EIO; |
| 2412 | } |
| 2413 | |
David Sterba | 74e4d82 | 2016-02-11 11:01:55 +0100 | [diff] [blame] | 2414 | log_tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL); |
Eric Sandeen | 63443bf | 2014-08-01 18:12:46 -0500 | [diff] [blame] | 2415 | if (!log_tree_root) |
| 2416 | return -ENOMEM; |
| 2417 | |
| 2418 | __setup_root(tree_root->nodesize, tree_root->sectorsize, |
| 2419 | tree_root->stripesize, log_tree_root, fs_info, |
| 2420 | BTRFS_TREE_LOG_OBJECTID); |
| 2421 | |
| 2422 | log_tree_root->node = read_tree_block(tree_root, bytenr, |
| 2423 | fs_info->generation + 1); |
Liu Bo | 64c043d | 2015-05-25 17:30:15 +0800 | [diff] [blame] | 2424 | if (IS_ERR(log_tree_root->node)) { |
David Sterba | f14d104 | 2015-10-08 11:37:06 +0200 | [diff] [blame] | 2425 | btrfs_warn(fs_info, "failed to read log tree"); |
Liu Bo | 0eeff23 | 2015-06-11 14:16:44 +0800 | [diff] [blame] | 2426 | ret = PTR_ERR(log_tree_root->node); |
Liu Bo | 64c043d | 2015-05-25 17:30:15 +0800 | [diff] [blame] | 2427 | kfree(log_tree_root); |
Liu Bo | 0eeff23 | 2015-06-11 14:16:44 +0800 | [diff] [blame] | 2428 | return ret; |
Liu Bo | 64c043d | 2015-05-25 17:30:15 +0800 | [diff] [blame] | 2429 | } else if (!extent_buffer_uptodate(log_tree_root->node)) { |
David Sterba | f14d104 | 2015-10-08 11:37:06 +0200 | [diff] [blame] | 2430 | btrfs_err(fs_info, "failed to read log tree"); |
Eric Sandeen | 63443bf | 2014-08-01 18:12:46 -0500 | [diff] [blame] | 2431 | free_extent_buffer(log_tree_root->node); |
| 2432 | kfree(log_tree_root); |
| 2433 | return -EIO; |
| 2434 | } |
| 2435 | /* returns with log_tree_root freed on success */ |
| 2436 | ret = btrfs_recover_log_trees(log_tree_root); |
| 2437 | if (ret) { |
Anand Jain | 34d9700 | 2016-03-16 16:43:06 +0800 | [diff] [blame] | 2438 | btrfs_handle_fs_error(tree_root->fs_info, ret, |
Eric Sandeen | 63443bf | 2014-08-01 18:12:46 -0500 | [diff] [blame] | 2439 | "Failed to recover log tree"); |
| 2440 | free_extent_buffer(log_tree_root->node); |
| 2441 | kfree(log_tree_root); |
| 2442 | return ret; |
| 2443 | } |
| 2444 | |
| 2445 | if (fs_info->sb->s_flags & MS_RDONLY) { |
| 2446 | ret = btrfs_commit_super(tree_root); |
| 2447 | if (ret) |
| 2448 | return ret; |
| 2449 | } |
| 2450 | |
| 2451 | return 0; |
| 2452 | } |
| 2453 | |
Eric Sandeen | 4bbcaa6 | 2014-08-01 18:12:45 -0500 | [diff] [blame] | 2454 | static int btrfs_read_roots(struct btrfs_fs_info *fs_info, |
| 2455 | struct btrfs_root *tree_root) |
| 2456 | { |
David Sterba | a4f3d2c | 2015-02-16 18:44:34 +0100 | [diff] [blame] | 2457 | struct btrfs_root *root; |
Eric Sandeen | 4bbcaa6 | 2014-08-01 18:12:45 -0500 | [diff] [blame] | 2458 | struct btrfs_key location; |
| 2459 | int ret; |
| 2460 | |
| 2461 | location.objectid = BTRFS_EXTENT_TREE_OBJECTID; |
| 2462 | location.type = BTRFS_ROOT_ITEM_KEY; |
| 2463 | location.offset = 0; |
| 2464 | |
David Sterba | a4f3d2c | 2015-02-16 18:44:34 +0100 | [diff] [blame] | 2465 | root = btrfs_read_tree_root(tree_root, &location); |
| 2466 | if (IS_ERR(root)) |
| 2467 | return PTR_ERR(root); |
| 2468 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); |
| 2469 | fs_info->extent_root = root; |
Eric Sandeen | 4bbcaa6 | 2014-08-01 18:12:45 -0500 | [diff] [blame] | 2470 | |
| 2471 | location.objectid = BTRFS_DEV_TREE_OBJECTID; |
David Sterba | a4f3d2c | 2015-02-16 18:44:34 +0100 | [diff] [blame] | 2472 | root = btrfs_read_tree_root(tree_root, &location); |
| 2473 | if (IS_ERR(root)) |
| 2474 | return PTR_ERR(root); |
| 2475 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); |
| 2476 | fs_info->dev_root = root; |
Eric Sandeen | 4bbcaa6 | 2014-08-01 18:12:45 -0500 | [diff] [blame] | 2477 | btrfs_init_devices_late(fs_info); |
| 2478 | |
| 2479 | location.objectid = BTRFS_CSUM_TREE_OBJECTID; |
David Sterba | a4f3d2c | 2015-02-16 18:44:34 +0100 | [diff] [blame] | 2480 | root = btrfs_read_tree_root(tree_root, &location); |
| 2481 | if (IS_ERR(root)) |
| 2482 | return PTR_ERR(root); |
| 2483 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); |
| 2484 | fs_info->csum_root = root; |
Eric Sandeen | 4bbcaa6 | 2014-08-01 18:12:45 -0500 | [diff] [blame] | 2485 | |
| 2486 | location.objectid = BTRFS_QUOTA_TREE_OBJECTID; |
David Sterba | a4f3d2c | 2015-02-16 18:44:34 +0100 | [diff] [blame] | 2487 | root = btrfs_read_tree_root(tree_root, &location); |
| 2488 | if (!IS_ERR(root)) { |
| 2489 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); |
Eric Sandeen | 4bbcaa6 | 2014-08-01 18:12:45 -0500 | [diff] [blame] | 2490 | fs_info->quota_enabled = 1; |
| 2491 | fs_info->pending_quota_state = 1; |
David Sterba | a4f3d2c | 2015-02-16 18:44:34 +0100 | [diff] [blame] | 2492 | fs_info->quota_root = root; |
Eric Sandeen | 4bbcaa6 | 2014-08-01 18:12:45 -0500 | [diff] [blame] | 2493 | } |
| 2494 | |
| 2495 | location.objectid = BTRFS_UUID_TREE_OBJECTID; |
David Sterba | a4f3d2c | 2015-02-16 18:44:34 +0100 | [diff] [blame] | 2496 | root = btrfs_read_tree_root(tree_root, &location); |
| 2497 | if (IS_ERR(root)) { |
| 2498 | ret = PTR_ERR(root); |
Eric Sandeen | 4bbcaa6 | 2014-08-01 18:12:45 -0500 | [diff] [blame] | 2499 | if (ret != -ENOENT) |
| 2500 | return ret; |
| 2501 | } else { |
David Sterba | a4f3d2c | 2015-02-16 18:44:34 +0100 | [diff] [blame] | 2502 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); |
| 2503 | fs_info->uuid_root = root; |
Eric Sandeen | 4bbcaa6 | 2014-08-01 18:12:45 -0500 | [diff] [blame] | 2504 | } |
| 2505 | |
Omar Sandoval | 70f6d82 | 2015-09-29 20:50:38 -0700 | [diff] [blame] | 2506 | if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { |
| 2507 | location.objectid = BTRFS_FREE_SPACE_TREE_OBJECTID; |
| 2508 | root = btrfs_read_tree_root(tree_root, &location); |
| 2509 | if (IS_ERR(root)) |
| 2510 | return PTR_ERR(root); |
| 2511 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); |
| 2512 | fs_info->free_space_root = root; |
| 2513 | } |
| 2514 | |
Eric Sandeen | 4bbcaa6 | 2014-08-01 18:12:45 -0500 | [diff] [blame] | 2515 | return 0; |
| 2516 | } |
| 2517 | |
Al Viro | ad2b2c8 | 2011-11-17 01:10:02 -0500 | [diff] [blame] | 2518 | int open_ctree(struct super_block *sb, |
| 2519 | struct btrfs_fs_devices *fs_devices, |
| 2520 | char *options) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 2521 | { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2522 | u32 sectorsize; |
| 2523 | u32 nodesize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 2524 | u32 stripesize; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2525 | u64 generation; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2526 | u64 features; |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 2527 | struct btrfs_key location; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2528 | struct buffer_head *bh; |
Ilya Dryomov | 4d34b27 | 2011-11-09 00:08:15 +0200 | [diff] [blame] | 2529 | struct btrfs_super_block *disk_super; |
Al Viro | 815745c | 2011-11-17 15:40:49 -0500 | [diff] [blame] | 2530 | struct btrfs_fs_info *fs_info = btrfs_sb(sb); |
Al Viro | f84a8bd | 2011-11-17 15:57:57 -0500 | [diff] [blame] | 2531 | struct btrfs_root *tree_root; |
Ilya Dryomov | 4d34b27 | 2011-11-09 00:08:15 +0200 | [diff] [blame] | 2532 | struct btrfs_root *chunk_root; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 2533 | int ret; |
Yan | e58ca02 | 2008-04-01 11:21:34 -0400 | [diff] [blame] | 2534 | int err = -EINVAL; |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2535 | int num_backups_tried = 0; |
| 2536 | int backup_index = 0; |
Qu Wenruo | 5cdc7ad3 | 2014-02-28 10:46:06 +0800 | [diff] [blame] | 2537 | int max_active; |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 2538 | |
David Sterba | 74e4d82 | 2016-02-11 11:01:55 +0100 | [diff] [blame] | 2539 | tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL); |
| 2540 | chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info, GFP_KERNEL); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 2541 | if (!tree_root || !chunk_root) { |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2542 | err = -ENOMEM; |
| 2543 | goto fail; |
| 2544 | } |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2545 | |
| 2546 | ret = init_srcu_struct(&fs_info->subvol_srcu); |
| 2547 | if (ret) { |
| 2548 | err = ret; |
| 2549 | goto fail; |
| 2550 | } |
| 2551 | |
| 2552 | ret = setup_bdi(fs_info, &fs_info->bdi); |
| 2553 | if (ret) { |
| 2554 | err = ret; |
| 2555 | goto fail_srcu; |
| 2556 | } |
| 2557 | |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 2558 | ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL); |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 2559 | if (ret) { |
| 2560 | err = ret; |
| 2561 | goto fail_bdi; |
| 2562 | } |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2563 | fs_info->dirty_metadata_batch = PAGE_SIZE * |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 2564 | (1 + ilog2(nr_cpu_ids)); |
| 2565 | |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 2566 | ret = percpu_counter_init(&fs_info->delalloc_bytes, 0, GFP_KERNEL); |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 2567 | if (ret) { |
| 2568 | err = ret; |
| 2569 | goto fail_dirty_metadata_bytes; |
| 2570 | } |
| 2571 | |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 2572 | ret = percpu_counter_init(&fs_info->bio_counter, 0, GFP_KERNEL); |
Miao Xie | c404e0d | 2014-01-30 16:46:55 +0800 | [diff] [blame] | 2573 | if (ret) { |
| 2574 | err = ret; |
| 2575 | goto fail_delalloc_bytes; |
| 2576 | } |
| 2577 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2578 | fs_info->btree_inode = new_inode(sb); |
| 2579 | if (!fs_info->btree_inode) { |
| 2580 | err = -ENOMEM; |
Miao Xie | c404e0d | 2014-01-30 16:46:55 +0800 | [diff] [blame] | 2581 | goto fail_bio_counter; |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2582 | } |
| 2583 | |
Chris Mason | a659171 | 2011-07-19 12:04:14 -0400 | [diff] [blame] | 2584 | mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); |
Miao Xie | 1561ded | 2011-03-27 16:07:36 +0800 | [diff] [blame] | 2585 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2586 | INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); |
Josef Bacik | f28491e | 2013-12-16 13:24:27 -0500 | [diff] [blame] | 2587 | INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC); |
Chris Mason | 8fd1779 | 2007-04-19 21:01:03 -0400 | [diff] [blame] | 2588 | INIT_LIST_HEAD(&fs_info->trans_list); |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 2589 | INIT_LIST_HEAD(&fs_info->dead_roots); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 2590 | INIT_LIST_HEAD(&fs_info->delayed_iputs); |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 2591 | INIT_LIST_HEAD(&fs_info->delalloc_roots); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2592 | INIT_LIST_HEAD(&fs_info->caching_block_groups); |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 2593 | spin_lock_init(&fs_info->delalloc_root_lock); |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 2594 | spin_lock_init(&fs_info->trans_lock); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2595 | spin_lock_init(&fs_info->fs_roots_radix_lock); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 2596 | spin_lock_init(&fs_info->delayed_iput_lock); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 2597 | spin_lock_init(&fs_info->defrag_inodes_lock); |
Josef Bacik | 2bf6475 | 2011-09-26 17:12:22 -0400 | [diff] [blame] | 2598 | spin_lock_init(&fs_info->free_chunk_lock); |
Jan Schmidt | f29021b | 2012-05-16 17:55:38 +0200 | [diff] [blame] | 2599 | spin_lock_init(&fs_info->tree_mod_seq_lock); |
Miao Xie | ceda086 | 2013-04-11 10:30:16 +0000 | [diff] [blame] | 2600 | spin_lock_init(&fs_info->super_lock); |
Josef Bacik | fcebe45 | 2014-05-13 17:30:47 -0700 | [diff] [blame] | 2601 | spin_lock_init(&fs_info->qgroup_op_lock); |
Josef Bacik | f28491e | 2013-12-16 13:24:27 -0500 | [diff] [blame] | 2602 | spin_lock_init(&fs_info->buffer_lock); |
Josef Bacik | 47ab2a6 | 2014-09-18 11:20:02 -0400 | [diff] [blame] | 2603 | spin_lock_init(&fs_info->unused_bgs_lock); |
Jan Schmidt | f29021b | 2012-05-16 17:55:38 +0200 | [diff] [blame] | 2604 | rwlock_init(&fs_info->tree_mod_log_lock); |
Zhao Lei | d7c1517 | 2015-02-26 10:49:20 +0800 | [diff] [blame] | 2605 | mutex_init(&fs_info->unused_bg_unpin_mutex); |
Filipe Manana | 67c5e7d | 2015-06-11 00:58:53 +0100 | [diff] [blame] | 2606 | mutex_init(&fs_info->delete_unused_bgs_mutex); |
Chris Mason | 7585717 | 2011-06-13 20:00:16 -0400 | [diff] [blame] | 2607 | mutex_init(&fs_info->reloc_mutex); |
Miao Xie | 573bfb7 | 2014-03-06 13:55:03 +0800 | [diff] [blame] | 2608 | mutex_init(&fs_info->delalloc_root_mutex); |
Filipe Manana | c2d6cb1 | 2016-01-15 11:05:12 +0000 | [diff] [blame] | 2609 | mutex_init(&fs_info->cleaner_delayed_iput_mutex); |
Miao Xie | de98ced | 2013-01-29 10:13:12 +0000 | [diff] [blame] | 2610 | seqlock_init(&fs_info->profiles_lock); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 2611 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2612 | INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 2613 | INIT_LIST_HEAD(&fs_info->space_info); |
Jan Schmidt | f29021b | 2012-05-16 17:55:38 +0200 | [diff] [blame] | 2614 | INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); |
Josef Bacik | 47ab2a6 | 2014-09-18 11:20:02 -0400 | [diff] [blame] | 2615 | INIT_LIST_HEAD(&fs_info->unused_bgs); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2616 | btrfs_mapping_init(&fs_info->mapping_tree); |
Miao Xie | 66d8f3d | 2012-09-06 04:02:28 -0600 | [diff] [blame] | 2617 | btrfs_init_block_rsv(&fs_info->global_block_rsv, |
| 2618 | BTRFS_BLOCK_RSV_GLOBAL); |
| 2619 | btrfs_init_block_rsv(&fs_info->delalloc_block_rsv, |
| 2620 | BTRFS_BLOCK_RSV_DELALLOC); |
| 2621 | btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); |
| 2622 | btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); |
| 2623 | btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); |
| 2624 | btrfs_init_block_rsv(&fs_info->delayed_block_rsv, |
| 2625 | BTRFS_BLOCK_RSV_DELOPS); |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 2626 | atomic_set(&fs_info->nr_async_submits, 0); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2627 | atomic_set(&fs_info->async_delalloc_pages, 0); |
Chris Mason | 8c8bee1 | 2008-09-29 11:19:10 -0400 | [diff] [blame] | 2628 | atomic_set(&fs_info->async_submit_draining, 0); |
Chris Mason | 0986fe9e | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 2629 | atomic_set(&fs_info->nr_async_bios, 0); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 2630 | atomic_set(&fs_info->defrag_running, 0); |
Josef Bacik | fcebe45 | 2014-05-13 17:30:47 -0700 | [diff] [blame] | 2631 | atomic_set(&fs_info->qgroup_op_seq, 0); |
Zhao Lei | 2fefd55 | 2016-01-07 18:38:48 +0800 | [diff] [blame] | 2632 | atomic_set(&fs_info->reada_works_cnt, 0); |
Jan Schmidt | fc36ed7e | 2013-04-24 16:57:33 +0000 | [diff] [blame] | 2633 | atomic64_set(&fs_info->tree_mod_seq, 0); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 2634 | fs_info->sb = sb; |
Filipe David Borba Manana | 95ac567 | 2013-08-08 22:45:48 +0100 | [diff] [blame] | 2635 | fs_info->max_inline = BTRFS_DEFAULT_MAX_INLINE; |
Josef Bacik | 9ed74f2 | 2009-09-11 16:12:44 -0400 | [diff] [blame] | 2636 | fs_info->metadata_ratio = 0; |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 2637 | fs_info->defrag_inodes = RB_ROOT; |
Josef Bacik | 2bf6475 | 2011-09-26 17:12:22 -0400 | [diff] [blame] | 2638 | fs_info->free_chunk_space = 0; |
Jan Schmidt | f29021b | 2012-05-16 17:55:38 +0200 | [diff] [blame] | 2639 | fs_info->tree_mod_log = RB_ROOT; |
David Sterba | 8b87dc1 | 2013-08-01 18:14:52 +0200 | [diff] [blame] | 2640 | fs_info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL; |
David Sterba | f8c269d | 2015-01-16 17:21:12 +0100 | [diff] [blame] | 2641 | fs_info->avg_delayed_ref_runtime = NSEC_PER_SEC >> 6; /* div by 64 */ |
Arne Jansen | 90519d6 | 2011-05-23 14:30:00 +0200 | [diff] [blame] | 2642 | /* readahead state */ |
Mel Gorman | d0164ad | 2015-11-06 16:28:21 -0800 | [diff] [blame] | 2643 | INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_DIRECT_RECLAIM); |
Arne Jansen | 90519d6 | 2011-05-23 14:30:00 +0200 | [diff] [blame] | 2644 | spin_lock_init(&fs_info->reada_lock); |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 2645 | |
Chris Mason | b34b086 | 2008-12-19 15:43:22 -0500 | [diff] [blame] | 2646 | fs_info->thread_pool_size = min_t(unsigned long, |
| 2647 | num_online_cpus() + 2, 8); |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 2648 | |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 2649 | INIT_LIST_HEAD(&fs_info->ordered_roots); |
| 2650 | spin_lock_init(&fs_info->ordered_root_lock); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2651 | fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), |
David Sterba | 74e4d82 | 2016-02-11 11:01:55 +0100 | [diff] [blame] | 2652 | GFP_KERNEL); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2653 | if (!fs_info->delayed_root) { |
| 2654 | err = -ENOMEM; |
| 2655 | goto fail_iput; |
| 2656 | } |
| 2657 | btrfs_init_delayed_root(fs_info->delayed_root); |
Chris Mason | 3eaa288 | 2008-07-24 11:57:52 -0400 | [diff] [blame] | 2658 | |
Eric Sandeen | 638aa7e | 2014-08-01 18:12:38 -0500 | [diff] [blame] | 2659 | btrfs_init_scrub(fs_info); |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 2660 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
| 2661 | fs_info->check_integrity_print_mask = 0; |
| 2662 | #endif |
Eric Sandeen | 779a65a | 2014-08-01 18:12:39 -0500 | [diff] [blame] | 2663 | btrfs_init_balance(fs_info); |
Miao Xie | 21c7e75 | 2014-05-13 17:29:04 -0700 | [diff] [blame] | 2664 | btrfs_init_async_reclaim_work(&fs_info->async_reclaim_work); |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 2665 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2666 | sb->s_blocksize = 4096; |
| 2667 | sb->s_blocksize_bits = blksize_bits(4096); |
Jens Axboe | 32a88aa | 2009-09-16 15:02:33 +0200 | [diff] [blame] | 2668 | sb->s_bdi = &fs_info->bdi; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2669 | |
Eric Sandeen | f37938e | 2014-08-01 18:12:40 -0500 | [diff] [blame] | 2670 | btrfs_init_btree_inode(fs_info, tree_root); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2671 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2672 | spin_lock_init(&fs_info->block_group_cache_lock); |
Eric Paris | 6bef4d3 | 2010-02-23 19:43:04 +0000 | [diff] [blame] | 2673 | fs_info->block_group_cache_tree = RB_ROOT; |
Liu Bo | a1897fd | 2012-12-27 09:01:23 +0000 | [diff] [blame] | 2674 | fs_info->first_logical_byte = (u64)-1; |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2675 | |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2676 | extent_io_tree_init(&fs_info->freed_extents[0], |
David Sterba | f993c88 | 2011-04-20 23:35:57 +0200 | [diff] [blame] | 2677 | fs_info->btree_inode->i_mapping); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2678 | extent_io_tree_init(&fs_info->freed_extents[1], |
David Sterba | f993c88 | 2011-04-20 23:35:57 +0200 | [diff] [blame] | 2679 | fs_info->btree_inode->i_mapping); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2680 | fs_info->pinned_extents = &fs_info->freed_extents[0]; |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 2681 | fs_info->do_barriers = 1; |
Chris Mason | f929574 | 2008-07-17 12:54:14 -0400 | [diff] [blame] | 2682 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 2683 | |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 2684 | mutex_init(&fs_info->ordered_operations_mutex); |
Chris Mason | 30ae846 | 2007-03-29 09:59:15 -0400 | [diff] [blame] | 2685 | mutex_init(&fs_info->tree_log_mutex); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2686 | mutex_init(&fs_info->chunk_mutex); |
| 2687 | mutex_init(&fs_info->transaction_kthread_mutex); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2688 | mutex_init(&fs_info->cleaner_mutex); |
| 2689 | mutex_init(&fs_info->volume_mutex); |
Chris Mason | 1bbc621 | 2015-04-06 12:46:08 -0700 | [diff] [blame] | 2690 | mutex_init(&fs_info->ro_block_group_mutex); |
Josef Bacik | 9e351cc | 2014-03-13 15:42:13 -0400 | [diff] [blame] | 2691 | init_rwsem(&fs_info->commit_root_sem); |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 2692 | init_rwsem(&fs_info->cleanup_work_sem); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2693 | init_rwsem(&fs_info->subvol_sem); |
Stefan Behrens | 803b2f5 | 2013-08-15 17:11:21 +0200 | [diff] [blame] | 2694 | sema_init(&fs_info->uuid_tree_rescan_sem, 1); |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 2695 | |
Eric Sandeen | ad61836 | 2014-08-01 18:12:41 -0500 | [diff] [blame] | 2696 | btrfs_init_dev_replace_locks(fs_info); |
Eric Sandeen | f9e92e4 | 2014-08-01 18:12:42 -0500 | [diff] [blame] | 2697 | btrfs_init_qgroup(fs_info); |
Arne Jansen | 416ac51 | 2011-09-13 12:56:09 +0200 | [diff] [blame] | 2698 | |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 2699 | btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); |
| 2700 | btrfs_init_free_cluster(&fs_info->data_alloc_cluster); |
| 2701 | |
Chris Mason | 7d9eb12 | 2008-07-08 14:19:17 -0400 | [diff] [blame] | 2702 | init_waitqueue_head(&fs_info->transaction_throttle); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 2703 | init_waitqueue_head(&fs_info->transaction_wait); |
Sage Weil | bb9c12c | 2010-10-29 15:37:34 -0400 | [diff] [blame] | 2704 | init_waitqueue_head(&fs_info->transaction_blocked_wait); |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 2705 | init_waitqueue_head(&fs_info->async_submit_wait); |
Chris Mason | 9a8dd15 | 2007-02-23 08:38:36 -0500 | [diff] [blame] | 2706 | |
Filipe Manana | 0421682 | 2014-11-27 21:14:15 +0000 | [diff] [blame] | 2707 | INIT_LIST_HEAD(&fs_info->pinned_chunks); |
| 2708 | |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 2709 | ret = btrfs_alloc_stripe_hash_table(fs_info); |
| 2710 | if (ret) { |
David Sterba | 83c8266 | 2013-03-01 15:03:00 +0000 | [diff] [blame] | 2711 | err = ret; |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 2712 | goto fail_alloc; |
| 2713 | } |
| 2714 | |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 2715 | __setup_root(4096, 4096, 4096, tree_root, |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 2716 | fs_info, BTRFS_ROOT_TREE_OBJECTID); |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 2717 | |
Chris Mason | 3c4bb26 | 2012-03-27 18:56:56 -0400 | [diff] [blame] | 2718 | invalidate_bdev(fs_devices->latest_bdev); |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 2719 | |
| 2720 | /* |
| 2721 | * Read super block and check the signature bytes only |
| 2722 | */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2723 | bh = btrfs_read_dev_super(fs_devices->latest_bdev); |
Anand Jain | 92fc03f | 2015-08-14 18:32:51 +0800 | [diff] [blame] | 2724 | if (IS_ERR(bh)) { |
| 2725 | err = PTR_ERR(bh); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2726 | goto fail_alloc; |
Dave Young | 20b4507 | 2011-01-08 10:09:13 +0000 | [diff] [blame] | 2727 | } |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2728 | |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 2729 | /* |
| 2730 | * We want to check superblock checksum, the type is stored inside. |
| 2731 | * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k). |
| 2732 | */ |
| 2733 | if (btrfs_check_super_csum(bh->b_data)) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2734 | btrfs_err(fs_info, "superblock checksum mismatch"); |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 2735 | err = -EINVAL; |
Anand Jain | b2acddd | 2015-10-07 17:23:23 +0800 | [diff] [blame] | 2736 | brelse(bh); |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 2737 | goto fail_alloc; |
| 2738 | } |
| 2739 | |
| 2740 | /* |
| 2741 | * super_copy is zeroed at allocation time and we never touch the |
| 2742 | * following bytes up to INFO_SIZE, the checksum is calculated from |
| 2743 | * the whole block of INFO_SIZE |
| 2744 | */ |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2745 | memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); |
| 2746 | memcpy(fs_info->super_for_commit, fs_info->super_copy, |
| 2747 | sizeof(*fs_info->super_for_commit)); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2748 | brelse(bh); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2749 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2750 | memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2751 | |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 2752 | ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); |
| 2753 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2754 | btrfs_err(fs_info, "superblock contains fatal errors"); |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 2755 | err = -EINVAL; |
| 2756 | goto fail_alloc; |
| 2757 | } |
| 2758 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2759 | disk_super = fs_info->super_copy; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2760 | if (!btrfs_super_root(disk_super)) |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2761 | goto fail_alloc; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2762 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2763 | /* check FS state, whether FS is broken. */ |
Miao Xie | 87533c4 | 2013-01-29 10:14:48 +0000 | [diff] [blame] | 2764 | if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) |
| 2765 | set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2766 | |
Liu Bo | 75e7cb7 | 2011-03-22 10:12:20 +0000 | [diff] [blame] | 2767 | /* |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2768 | * run through our array of backup supers and setup |
| 2769 | * our ring pointer to the oldest one |
| 2770 | */ |
| 2771 | generation = btrfs_super_generation(disk_super); |
| 2772 | find_oldest_super_backup(fs_info, generation); |
| 2773 | |
| 2774 | /* |
Liu Bo | 75e7cb7 | 2011-03-22 10:12:20 +0000 | [diff] [blame] | 2775 | * In the long term, we'll store the compression type in the super |
| 2776 | * block, and it'll be used for per file compression control. |
| 2777 | */ |
| 2778 | fs_info->compress_type = BTRFS_COMPRESS_ZLIB; |
| 2779 | |
Qu Wenruo | 96da091 | 2016-01-19 10:23:03 +0800 | [diff] [blame] | 2780 | ret = btrfs_parse_options(tree_root, options, sb->s_flags); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2781 | if (ret) { |
| 2782 | err = ret; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2783 | goto fail_alloc; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2784 | } |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2785 | |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2786 | features = btrfs_super_incompat_flags(disk_super) & |
| 2787 | ~BTRFS_FEATURE_INCOMPAT_SUPP; |
| 2788 | if (features) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2789 | btrfs_err(fs_info, |
| 2790 | "cannot mount because of unsupported optional features (%llx)", |
| 2791 | features); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2792 | err = -EINVAL; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2793 | goto fail_alloc; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2794 | } |
| 2795 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2796 | features = btrfs_super_incompat_flags(disk_super); |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 2797 | features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; |
Li Zefan | 69e380d | 2012-06-11 17:10:51 +0800 | [diff] [blame] | 2798 | if (tree_root->fs_info->compress_type == BTRFS_COMPRESS_LZO) |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 2799 | features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 2800 | |
Josef Bacik | 3173a18 | 2013-03-07 14:22:04 -0500 | [diff] [blame] | 2801 | if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2802 | btrfs_info(fs_info, "has skinny extents"); |
Josef Bacik | 3173a18 | 2013-03-07 14:22:04 -0500 | [diff] [blame] | 2803 | |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 2804 | /* |
| 2805 | * flag our filesystem as having big metadata blocks if |
| 2806 | * they are bigger than the page size |
| 2807 | */ |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2808 | if (btrfs_super_nodesize(disk_super) > PAGE_SIZE) { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 2809 | if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2810 | btrfs_info(fs_info, |
| 2811 | "flagging fs with big metadata feature"); |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 2812 | features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; |
| 2813 | } |
| 2814 | |
Chris Mason | bc3f116 | 2012-03-29 17:02:47 -0400 | [diff] [blame] | 2815 | nodesize = btrfs_super_nodesize(disk_super); |
Chris Mason | bc3f116 | 2012-03-29 17:02:47 -0400 | [diff] [blame] | 2816 | sectorsize = btrfs_super_sectorsize(disk_super); |
Chandan Rajendra | b7f6705 | 2016-06-23 15:16:44 +0530 | [diff] [blame] | 2817 | stripesize = sectorsize; |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 2818 | fs_info->dirty_metadata_batch = nodesize * (1 + ilog2(nr_cpu_ids)); |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 2819 | fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); |
Chris Mason | bc3f116 | 2012-03-29 17:02:47 -0400 | [diff] [blame] | 2820 | |
| 2821 | /* |
| 2822 | * mixed block groups end up with duplicate but slightly offset |
| 2823 | * extent buffers for the same range. It leads to corruptions |
| 2824 | */ |
| 2825 | if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 2826 | (sectorsize != nodesize)) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2827 | btrfs_err(fs_info, |
| 2828 | "unequal nodesize/sectorsize (%u != %u) are not allowed for mixed block groups", |
| 2829 | nodesize, sectorsize); |
Chris Mason | bc3f116 | 2012-03-29 17:02:47 -0400 | [diff] [blame] | 2830 | goto fail_alloc; |
| 2831 | } |
| 2832 | |
Miao Xie | ceda086 | 2013-04-11 10:30:16 +0000 | [diff] [blame] | 2833 | /* |
| 2834 | * Needn't use the lock because there is no other task which will |
| 2835 | * update the flag. |
| 2836 | */ |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 2837 | btrfs_set_super_incompat_flags(disk_super, features); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2838 | |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2839 | features = btrfs_super_compat_ro_flags(disk_super) & |
| 2840 | ~BTRFS_FEATURE_COMPAT_RO_SUPP; |
| 2841 | if (!(sb->s_flags & MS_RDONLY) && features) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2842 | btrfs_err(fs_info, |
| 2843 | "cannot mount read-write because of unsupported optional features (%llx)", |
Geert Uytterhoeven | c1c9ff7 | 2013-08-20 13:20:07 +0200 | [diff] [blame] | 2844 | features); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2845 | err = -EINVAL; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2846 | goto fail_alloc; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2847 | } |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2848 | |
Qu Wenruo | 5cdc7ad3 | 2014-02-28 10:46:06 +0800 | [diff] [blame] | 2849 | max_active = fs_info->thread_pool_size; |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2850 | |
Eric Sandeen | 2a45819 | 2015-02-16 16:29:26 +0100 | [diff] [blame] | 2851 | ret = btrfs_init_workqueues(fs_info, fs_devices); |
| 2852 | if (ret) { |
| 2853 | err = ret; |
Josef Bacik | 0dc3b84 | 2011-11-18 14:37:27 -0500 | [diff] [blame] | 2854 | goto fail_sb_buffer; |
| 2855 | } |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 2856 | |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 2857 | fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 2858 | fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2859 | SZ_4M / PAGE_SIZE); |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 2860 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2861 | tree_root->nodesize = nodesize; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2862 | tree_root->sectorsize = sectorsize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 2863 | tree_root->stripesize = stripesize; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2864 | |
| 2865 | sb->s_blocksize = sectorsize; |
| 2866 | sb->s_blocksize_bits = blksize_bits(sectorsize); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2867 | |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2868 | mutex_lock(&fs_info->chunk_mutex); |
Yan Zheng | e4404d6 | 2008-12-12 10:03:26 -0500 | [diff] [blame] | 2869 | ret = btrfs_read_sys_array(tree_root); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2870 | mutex_unlock(&fs_info->chunk_mutex); |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 2871 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2872 | btrfs_err(fs_info, "failed to read the system array: %d", ret); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2873 | goto fail_sb_buffer; |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 2874 | } |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2875 | |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2876 | generation = btrfs_super_chunk_root_generation(disk_super); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2877 | |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 2878 | __setup_root(nodesize, sectorsize, stripesize, chunk_root, |
| 2879 | fs_info, BTRFS_CHUNK_TREE_OBJECTID); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2880 | |
| 2881 | chunk_root->node = read_tree_block(chunk_root, |
| 2882 | btrfs_super_chunk_root(disk_super), |
David Sterba | ce86cd5 | 2014-06-15 01:07:32 +0200 | [diff] [blame] | 2883 | generation); |
Liu Bo | 64c043d | 2015-05-25 17:30:15 +0800 | [diff] [blame] | 2884 | if (IS_ERR(chunk_root->node) || |
| 2885 | !extent_buffer_uptodate(chunk_root->node)) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2886 | btrfs_err(fs_info, "failed to read chunk root"); |
chandan | e5fffba | 2015-10-05 22:14:25 +0530 | [diff] [blame] | 2887 | if (!IS_ERR(chunk_root->node)) |
| 2888 | free_extent_buffer(chunk_root->node); |
Zhao Lei | 95ab1f6 | 2015-07-15 21:02:09 +0800 | [diff] [blame] | 2889 | chunk_root->node = NULL; |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2890 | goto fail_tree_roots; |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 2891 | } |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2892 | btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); |
| 2893 | chunk_root->commit_root = btrfs_root_node(chunk_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2894 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 2895 | read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, |
Geert Uytterhoeven | b308bc2 | 2013-08-20 13:20:15 +0200 | [diff] [blame] | 2896 | btrfs_header_chunk_tree_uuid(chunk_root->node), BTRFS_UUID_SIZE); |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 2897 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2898 | ret = btrfs_read_chunk_tree(chunk_root); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2899 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2900 | btrfs_err(fs_info, "failed to read chunk tree: %d", ret); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2901 | goto fail_tree_roots; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2902 | } |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2903 | |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 2904 | /* |
| 2905 | * keep the device that is marked to be the target device for the |
| 2906 | * dev_replace procedure |
| 2907 | */ |
Eric Sandeen | 9eaed21 | 2014-08-01 18:12:35 -0500 | [diff] [blame] | 2908 | btrfs_close_extra_devices(fs_devices, 0); |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2909 | |
Chris Mason | a6b0d5c | 2012-02-20 20:53:43 -0500 | [diff] [blame] | 2910 | if (!fs_devices->latest_bdev) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2911 | btrfs_err(fs_info, "failed to read devices"); |
Chris Mason | a6b0d5c | 2012-02-20 20:53:43 -0500 | [diff] [blame] | 2912 | goto fail_tree_roots; |
| 2913 | } |
| 2914 | |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2915 | retry_root_backup: |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2916 | generation = btrfs_super_generation(disk_super); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2917 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 2918 | tree_root->node = read_tree_block(tree_root, |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2919 | btrfs_super_root(disk_super), |
David Sterba | ce86cd5 | 2014-06-15 01:07:32 +0200 | [diff] [blame] | 2920 | generation); |
Liu Bo | 64c043d | 2015-05-25 17:30:15 +0800 | [diff] [blame] | 2921 | if (IS_ERR(tree_root->node) || |
| 2922 | !extent_buffer_uptodate(tree_root->node)) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2923 | btrfs_warn(fs_info, "failed to read tree root"); |
chandan | e5fffba | 2015-10-05 22:14:25 +0530 | [diff] [blame] | 2924 | if (!IS_ERR(tree_root->node)) |
| 2925 | free_extent_buffer(tree_root->node); |
Zhao Lei | 95ab1f6 | 2015-07-15 21:02:09 +0800 | [diff] [blame] | 2926 | tree_root->node = NULL; |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2927 | goto recovery_tree_root; |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 2928 | } |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2929 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2930 | btrfs_set_root_node(&tree_root->root_item, tree_root->node); |
| 2931 | tree_root->commit_root = btrfs_root_node(tree_root); |
Stefan Behrens | 69e9c6c | 2013-09-05 16:58:43 +0200 | [diff] [blame] | 2932 | btrfs_set_root_refs(&tree_root->root_item, 1); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2933 | |
Chandan Rajendra | f32e48e | 2016-01-07 18:56:59 +0530 | [diff] [blame] | 2934 | mutex_lock(&tree_root->objectid_mutex); |
| 2935 | ret = btrfs_find_highest_objectid(tree_root, |
| 2936 | &tree_root->highest_objectid); |
| 2937 | if (ret) { |
| 2938 | mutex_unlock(&tree_root->objectid_mutex); |
| 2939 | goto recovery_tree_root; |
| 2940 | } |
| 2941 | |
| 2942 | ASSERT(tree_root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); |
| 2943 | |
| 2944 | mutex_unlock(&tree_root->objectid_mutex); |
| 2945 | |
Eric Sandeen | 4bbcaa6 | 2014-08-01 18:12:45 -0500 | [diff] [blame] | 2946 | ret = btrfs_read_roots(fs_info, tree_root); |
| 2947 | if (ret) |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2948 | goto recovery_tree_root; |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 2949 | |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2950 | fs_info->generation = generation; |
| 2951 | fs_info->last_trans_committed = generation; |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2952 | |
Ilya Dryomov | 68310a5 | 2012-06-22 12:24:12 -0600 | [diff] [blame] | 2953 | ret = btrfs_recover_balance(fs_info); |
| 2954 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2955 | btrfs_err(fs_info, "failed to recover balance: %d", ret); |
Ilya Dryomov | 68310a5 | 2012-06-22 12:24:12 -0600 | [diff] [blame] | 2956 | goto fail_block_groups; |
| 2957 | } |
| 2958 | |
Stefan Behrens | 733f4fb | 2012-05-25 16:06:10 +0200 | [diff] [blame] | 2959 | ret = btrfs_init_dev_stats(fs_info); |
| 2960 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2961 | btrfs_err(fs_info, "failed to init dev_stats: %d", ret); |
Stefan Behrens | 733f4fb | 2012-05-25 16:06:10 +0200 | [diff] [blame] | 2962 | goto fail_block_groups; |
| 2963 | } |
| 2964 | |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 2965 | ret = btrfs_init_dev_replace(fs_info); |
| 2966 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2967 | btrfs_err(fs_info, "failed to init dev_replace: %d", ret); |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 2968 | goto fail_block_groups; |
| 2969 | } |
| 2970 | |
Eric Sandeen | 9eaed21 | 2014-08-01 18:12:35 -0500 | [diff] [blame] | 2971 | btrfs_close_extra_devices(fs_devices, 1); |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 2972 | |
Anand Jain | b7c35e8 | 2015-03-10 06:38:38 +0800 | [diff] [blame] | 2973 | ret = btrfs_sysfs_add_fsid(fs_devices, NULL); |
| 2974 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2975 | btrfs_err(fs_info, "failed to init sysfs fsid interface: %d", |
| 2976 | ret); |
Anand Jain | b7c35e8 | 2015-03-10 06:38:38 +0800 | [diff] [blame] | 2977 | goto fail_block_groups; |
| 2978 | } |
| 2979 | |
| 2980 | ret = btrfs_sysfs_add_device(fs_devices); |
| 2981 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2982 | btrfs_err(fs_info, "failed to init sysfs device interface: %d", |
| 2983 | ret); |
Anand Jain | b7c35e8 | 2015-03-10 06:38:38 +0800 | [diff] [blame] | 2984 | goto fail_fsdev_sysfs; |
| 2985 | } |
| 2986 | |
Anand Jain | 96f3136 | 2015-08-14 18:32:46 +0800 | [diff] [blame] | 2987 | ret = btrfs_sysfs_add_mounted(fs_info); |
Jeff Mahoney | 5ac1d20 | 2013-11-01 13:06:58 -0400 | [diff] [blame] | 2988 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2989 | btrfs_err(fs_info, "failed to init sysfs interface: %d", ret); |
Anand Jain | b7c35e8 | 2015-03-10 06:38:38 +0800 | [diff] [blame] | 2990 | goto fail_fsdev_sysfs; |
Jeff Mahoney | 5ac1d20 | 2013-11-01 13:06:58 -0400 | [diff] [blame] | 2991 | } |
| 2992 | |
liubo | c59021f | 2011-03-07 02:13:14 +0000 | [diff] [blame] | 2993 | ret = btrfs_init_space_info(fs_info); |
| 2994 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 2995 | btrfs_err(fs_info, "failed to initialize space info: %d", ret); |
Anand Jain | 2365dd3 | 2014-01-22 11:15:51 +0800 | [diff] [blame] | 2996 | goto fail_sysfs; |
liubo | c59021f | 2011-03-07 02:13:14 +0000 | [diff] [blame] | 2997 | } |
| 2998 | |
Eric Sandeen | 4bbcaa6 | 2014-08-01 18:12:45 -0500 | [diff] [blame] | 2999 | ret = btrfs_read_block_groups(fs_info->extent_root); |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 3000 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 3001 | btrfs_err(fs_info, "failed to read block groups: %d", ret); |
Anand Jain | 2365dd3 | 2014-01-22 11:15:51 +0800 | [diff] [blame] | 3002 | goto fail_sysfs; |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 3003 | } |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3004 | fs_info->num_tolerated_disk_barrier_failures = |
| 3005 | btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); |
Stefan Behrens | 292fd7f | 2012-10-30 17:16:16 +0000 | [diff] [blame] | 3006 | if (fs_info->fs_devices->missing_devices > |
| 3007 | fs_info->num_tolerated_disk_barrier_failures && |
| 3008 | !(sb->s_flags & MS_RDONLY)) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 3009 | btrfs_warn(fs_info, |
| 3010 | "missing devices (%llu) exceeds the limit (%d), writeable mount is not allowed", |
Zhao Lei | 78fa177 | 2015-07-20 17:54:50 +0800 | [diff] [blame] | 3011 | fs_info->fs_devices->missing_devices, |
| 3012 | fs_info->num_tolerated_disk_barrier_failures); |
Anand Jain | 2365dd3 | 2014-01-22 11:15:51 +0800 | [diff] [blame] | 3013 | goto fail_sysfs; |
Stefan Behrens | 292fd7f | 2012-10-30 17:16:16 +0000 | [diff] [blame] | 3014 | } |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 3015 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 3016 | fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, |
| 3017 | "btrfs-cleaner"); |
Qinghuang Feng | 57506d5 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 3018 | if (IS_ERR(fs_info->cleaner_kthread)) |
Anand Jain | 2365dd3 | 2014-01-22 11:15:51 +0800 | [diff] [blame] | 3019 | goto fail_sysfs; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 3020 | |
| 3021 | fs_info->transaction_kthread = kthread_run(transaction_kthread, |
| 3022 | tree_root, |
| 3023 | "btrfs-transaction"); |
Qinghuang Feng | 57506d5 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 3024 | if (IS_ERR(fs_info->transaction_kthread)) |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 3025 | goto fail_cleaner; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 3026 | |
Jeff Mahoney | 3cdde22 | 2016-06-09 21:38:35 -0400 | [diff] [blame] | 3027 | if (!btrfs_test_opt(tree_root->fs_info, SSD) && |
| 3028 | !btrfs_test_opt(tree_root->fs_info, NOSSD) && |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 3029 | !fs_info->fs_devices->rotating) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 3030 | btrfs_info(fs_info, "detected SSD devices, enabling SSD mode"); |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 3031 | btrfs_set_opt(fs_info->mount_opt, SSD); |
| 3032 | } |
| 3033 | |
David Sterba | 572d9ab | 2014-02-05 15:26:17 +0100 | [diff] [blame] | 3034 | /* |
Nicholas D Steeves | 0132761 | 2016-05-19 21:18:45 -0400 | [diff] [blame] | 3035 | * Mount does not set all options immediately, we can do it now and do |
David Sterba | 572d9ab | 2014-02-05 15:26:17 +0100 | [diff] [blame] | 3036 | * not have to wait for transaction commit |
| 3037 | */ |
| 3038 | btrfs_apply_pending_changes(fs_info); |
Qu Wenruo | 3818aea | 2014-01-13 13:36:06 +0800 | [diff] [blame] | 3039 | |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 3040 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
Jeff Mahoney | 3cdde22 | 2016-06-09 21:38:35 -0400 | [diff] [blame] | 3041 | if (btrfs_test_opt(tree_root->fs_info, CHECK_INTEGRITY)) { |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 3042 | ret = btrfsic_mount(tree_root, fs_devices, |
Jeff Mahoney | 3cdde22 | 2016-06-09 21:38:35 -0400 | [diff] [blame] | 3043 | btrfs_test_opt(tree_root->fs_info, |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 3044 | CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? |
| 3045 | 1 : 0, |
| 3046 | fs_info->check_integrity_print_mask); |
| 3047 | if (ret) |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 3048 | btrfs_warn(fs_info, |
| 3049 | "failed to initialize integrity check module: %d", |
| 3050 | ret); |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 3051 | } |
| 3052 | #endif |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 3053 | ret = btrfs_read_qgroup_config(fs_info); |
| 3054 | if (ret) |
| 3055 | goto fail_trans_kthread; |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 3056 | |
Qu Wenruo | 96da091 | 2016-01-19 10:23:03 +0800 | [diff] [blame] | 3057 | /* do not make disk changes in broken FS or nologreplay is given */ |
| 3058 | if (btrfs_super_log_root(disk_super) != 0 && |
Jeff Mahoney | 3cdde22 | 2016-06-09 21:38:35 -0400 | [diff] [blame] | 3059 | !btrfs_test_opt(tree_root->fs_info, NOLOGREPLAY)) { |
Eric Sandeen | 63443bf | 2014-08-01 18:12:46 -0500 | [diff] [blame] | 3060 | ret = btrfs_replay_log(fs_info, fs_devices); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3061 | if (ret) { |
Eric Sandeen | 63443bf | 2014-08-01 18:12:46 -0500 | [diff] [blame] | 3062 | err = ret; |
Wang Shilong | 28c16cb | 2014-04-23 19:33:35 +0800 | [diff] [blame] | 3063 | goto fail_qgroup; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3064 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3065 | } |
Zheng Yan | 1a40e23 | 2008-09-26 10:09:34 -0400 | [diff] [blame] | 3066 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 3067 | ret = btrfs_find_orphan_roots(tree_root); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3068 | if (ret) |
Wang Shilong | 28c16cb | 2014-04-23 19:33:35 +0800 | [diff] [blame] | 3069 | goto fail_qgroup; |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 3070 | |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 3071 | if (!(sb->s_flags & MS_RDONLY)) { |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 3072 | ret = btrfs_cleanup_fs_roots(fs_info); |
Ilya Dryomov | 44c44af | 2012-06-22 12:14:13 -0600 | [diff] [blame] | 3073 | if (ret) |
Wang Shilong | 28c16cb | 2014-04-23 19:33:35 +0800 | [diff] [blame] | 3074 | goto fail_qgroup; |
Zygo Blaxell | 90c711a | 2016-06-12 23:39:58 -0400 | [diff] [blame] | 3075 | |
| 3076 | mutex_lock(&fs_info->cleaner_mutex); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 3077 | ret = btrfs_recover_relocation(tree_root); |
Zygo Blaxell | 90c711a | 2016-06-12 23:39:58 -0400 | [diff] [blame] | 3078 | mutex_unlock(&fs_info->cleaner_mutex); |
Miao Xie | d7ce584 | 2010-02-02 08:46:44 +0000 | [diff] [blame] | 3079 | if (ret < 0) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 3080 | btrfs_warn(fs_info, "failed to recover relocation: %d", |
| 3081 | ret); |
Miao Xie | d7ce584 | 2010-02-02 08:46:44 +0000 | [diff] [blame] | 3082 | err = -EINVAL; |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 3083 | goto fail_qgroup; |
Miao Xie | d7ce584 | 2010-02-02 08:46:44 +0000 | [diff] [blame] | 3084 | } |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 3085 | } |
Zheng Yan | 1a40e23 | 2008-09-26 10:09:34 -0400 | [diff] [blame] | 3086 | |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 3087 | location.objectid = BTRFS_FS_TREE_OBJECTID; |
| 3088 | location.type = BTRFS_ROOT_ITEM_KEY; |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 3089 | location.offset = 0; |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 3090 | |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 3091 | 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] | 3092 | if (IS_ERR(fs_info->fs_root)) { |
| 3093 | err = PTR_ERR(fs_info->fs_root); |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 3094 | goto fail_qgroup; |
Dan Carpenter | 3140c9a | 2010-05-29 09:44:10 +0000 | [diff] [blame] | 3095 | } |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 3096 | |
Ilya Dryomov | 2b6ba62 | 2012-06-22 12:24:13 -0600 | [diff] [blame] | 3097 | if (sb->s_flags & MS_RDONLY) |
| 3098 | return 0; |
Ilya Dryomov | 5964101 | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 3099 | |
Jeff Mahoney | 3cdde22 | 2016-06-09 21:38:35 -0400 | [diff] [blame] | 3100 | if (btrfs_test_opt(tree_root->fs_info, FREE_SPACE_TREE) && |
Chris Mason | 511711a | 2015-12-30 07:52:35 -0800 | [diff] [blame] | 3101 | !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 3102 | btrfs_info(fs_info, "creating free space tree"); |
Chris Mason | 511711a | 2015-12-30 07:52:35 -0800 | [diff] [blame] | 3103 | ret = btrfs_create_free_space_tree(fs_info); |
| 3104 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 3105 | btrfs_warn(fs_info, |
| 3106 | "failed to create free space tree: %d", ret); |
Chris Mason | 511711a | 2015-12-30 07:52:35 -0800 | [diff] [blame] | 3107 | close_ctree(tree_root); |
| 3108 | return ret; |
| 3109 | } |
| 3110 | } |
| 3111 | |
Ilya Dryomov | 2b6ba62 | 2012-06-22 12:24:13 -0600 | [diff] [blame] | 3112 | down_read(&fs_info->cleanup_work_sem); |
| 3113 | if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || |
| 3114 | (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { |
Josef Bacik | e3acc2a | 2010-01-26 14:30:53 +0000 | [diff] [blame] | 3115 | up_read(&fs_info->cleanup_work_sem); |
Ilya Dryomov | 2b6ba62 | 2012-06-22 12:24:13 -0600 | [diff] [blame] | 3116 | close_ctree(tree_root); |
| 3117 | return ret; |
| 3118 | } |
| 3119 | up_read(&fs_info->cleanup_work_sem); |
Ilya Dryomov | 5964101 | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 3120 | |
Ilya Dryomov | 2b6ba62 | 2012-06-22 12:24:13 -0600 | [diff] [blame] | 3121 | ret = btrfs_resume_balance_async(fs_info); |
| 3122 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 3123 | btrfs_warn(fs_info, "failed to resume balance: %d", ret); |
Ilya Dryomov | 2b6ba62 | 2012-06-22 12:24:13 -0600 | [diff] [blame] | 3124 | close_ctree(tree_root); |
| 3125 | return ret; |
Josef Bacik | e3acc2a | 2010-01-26 14:30:53 +0000 | [diff] [blame] | 3126 | } |
| 3127 | |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 3128 | ret = btrfs_resume_dev_replace_async(fs_info); |
| 3129 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 3130 | btrfs_warn(fs_info, "failed to resume device replace: %d", ret); |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 3131 | close_ctree(tree_root); |
| 3132 | return ret; |
| 3133 | } |
| 3134 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3135 | btrfs_qgroup_rescan_resume(fs_info); |
| 3136 | |
Jeff Mahoney | 3cdde22 | 2016-06-09 21:38:35 -0400 | [diff] [blame] | 3137 | if (btrfs_test_opt(tree_root->fs_info, CLEAR_CACHE) && |
Omar Sandoval | 70f6d82 | 2015-09-29 20:50:38 -0700 | [diff] [blame] | 3138 | btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 3139 | btrfs_info(fs_info, "clearing free space tree"); |
Omar Sandoval | 70f6d82 | 2015-09-29 20:50:38 -0700 | [diff] [blame] | 3140 | ret = btrfs_clear_free_space_tree(fs_info); |
| 3141 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 3142 | btrfs_warn(fs_info, |
| 3143 | "failed to clear free space tree: %d", ret); |
Omar Sandoval | 70f6d82 | 2015-09-29 20:50:38 -0700 | [diff] [blame] | 3144 | close_ctree(tree_root); |
| 3145 | return ret; |
| 3146 | } |
| 3147 | } |
| 3148 | |
Eric Sandeen | 4bbcaa6 | 2014-08-01 18:12:45 -0500 | [diff] [blame] | 3149 | if (!fs_info->uuid_root) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 3150 | btrfs_info(fs_info, "creating UUID tree"); |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 3151 | ret = btrfs_create_uuid_tree(fs_info); |
| 3152 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 3153 | btrfs_warn(fs_info, |
| 3154 | "failed to create the UUID tree: %d", ret); |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 3155 | close_ctree(tree_root); |
| 3156 | return ret; |
| 3157 | } |
Jeff Mahoney | 3cdde22 | 2016-06-09 21:38:35 -0400 | [diff] [blame] | 3158 | } else if (btrfs_test_opt(tree_root->fs_info, RESCAN_UUID_TREE) || |
Eric Sandeen | 4bbcaa6 | 2014-08-01 18:12:45 -0500 | [diff] [blame] | 3159 | fs_info->generation != |
| 3160 | btrfs_super_uuid_tree_generation(disk_super)) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 3161 | btrfs_info(fs_info, "checking UUID tree"); |
Stefan Behrens | 70f8017 | 2013-08-15 17:11:23 +0200 | [diff] [blame] | 3162 | ret = btrfs_check_uuid_tree(fs_info); |
| 3163 | if (ret) { |
David Sterba | 05135f5 | 2016-05-09 11:32:39 +0200 | [diff] [blame] | 3164 | btrfs_warn(fs_info, |
| 3165 | "failed to check the UUID tree: %d", ret); |
Stefan Behrens | 70f8017 | 2013-08-15 17:11:23 +0200 | [diff] [blame] | 3166 | close_ctree(tree_root); |
| 3167 | return ret; |
| 3168 | } |
| 3169 | } else { |
| 3170 | fs_info->update_uuid_tree_gen = 1; |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 3171 | } |
| 3172 | |
Josef Bacik | 47ab2a6 | 2014-09-18 11:20:02 -0400 | [diff] [blame] | 3173 | fs_info->open = 1; |
| 3174 | |
Qu Wenruo | 8dcddfa | 2016-01-19 10:23:02 +0800 | [diff] [blame] | 3175 | /* |
| 3176 | * backuproot only affect mount behavior, and if open_ctree succeeded, |
| 3177 | * no need to keep the flag |
| 3178 | */ |
| 3179 | btrfs_clear_opt(fs_info->mount_opt, USEBACKUPROOT); |
| 3180 | |
Al Viro | ad2b2c8 | 2011-11-17 01:10:02 -0500 | [diff] [blame] | 3181 | return 0; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 3182 | |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 3183 | fail_qgroup: |
| 3184 | btrfs_free_qgroup_config(fs_info); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 3185 | fail_trans_kthread: |
| 3186 | kthread_stop(fs_info->transaction_kthread); |
Josef Bacik | 54067ae | 2013-04-25 13:44:38 -0400 | [diff] [blame] | 3187 | btrfs_cleanup_transaction(fs_info->tree_root); |
Josef Bacik | faa2dbf | 2014-05-07 17:06:09 -0400 | [diff] [blame] | 3188 | btrfs_free_fs_roots(fs_info); |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 3189 | fail_cleaner: |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 3190 | kthread_stop(fs_info->cleaner_kthread); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 3191 | |
| 3192 | /* |
| 3193 | * make sure we're done with the btree inode before we stop our |
| 3194 | * kthreads |
| 3195 | */ |
| 3196 | filemap_write_and_wait(fs_info->btree_inode->i_mapping); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 3197 | |
Anand Jain | 2365dd3 | 2014-01-22 11:15:51 +0800 | [diff] [blame] | 3198 | fail_sysfs: |
Anand Jain | 6618a59 | 2015-08-14 18:32:47 +0800 | [diff] [blame] | 3199 | btrfs_sysfs_remove_mounted(fs_info); |
Anand Jain | 2365dd3 | 2014-01-22 11:15:51 +0800 | [diff] [blame] | 3200 | |
Anand Jain | b7c35e8 | 2015-03-10 06:38:38 +0800 | [diff] [blame] | 3201 | fail_fsdev_sysfs: |
| 3202 | btrfs_sysfs_remove_fsid(fs_info->fs_devices); |
| 3203 | |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 3204 | fail_block_groups: |
Josef Bacik | 54067ae | 2013-04-25 13:44:38 -0400 | [diff] [blame] | 3205 | btrfs_put_block_group_cache(fs_info); |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 3206 | btrfs_free_block_groups(fs_info); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 3207 | |
| 3208 | fail_tree_roots: |
| 3209 | free_root_pointers(fs_info, 1); |
Miao Xie | 2b8195b | 2013-02-07 06:01:35 +0000 | [diff] [blame] | 3210 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 3211 | |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 3212 | fail_sb_buffer: |
Liu Bo | 7abadb6 | 2013-03-17 02:10:31 +0000 | [diff] [blame] | 3213 | btrfs_stop_all_workers(fs_info); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 3214 | fail_alloc: |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 3215 | fail_iput: |
Ilya Dryomov | 586e46e | 2011-11-09 13:26:37 +0200 | [diff] [blame] | 3216 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
| 3217 | |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 3218 | iput(fs_info->btree_inode); |
Miao Xie | c404e0d | 2014-01-30 16:46:55 +0800 | [diff] [blame] | 3219 | fail_bio_counter: |
| 3220 | percpu_counter_destroy(&fs_info->bio_counter); |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 3221 | fail_delalloc_bytes: |
| 3222 | percpu_counter_destroy(&fs_info->delalloc_bytes); |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 3223 | fail_dirty_metadata_bytes: |
| 3224 | percpu_counter_destroy(&fs_info->dirty_metadata_bytes); |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 3225 | fail_bdi: |
Qinghuang Feng | 7e66285 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 3226 | bdi_destroy(&fs_info->bdi); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 3227 | fail_srcu: |
| 3228 | cleanup_srcu_struct(&fs_info->subvol_srcu); |
Qinghuang Feng | 7e66285 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 3229 | fail: |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 3230 | btrfs_free_stripe_hash_table(fs_info); |
Ilya Dryomov | 586e46e | 2011-11-09 13:26:37 +0200 | [diff] [blame] | 3231 | btrfs_close_devices(fs_info->fs_devices); |
Al Viro | ad2b2c8 | 2011-11-17 01:10:02 -0500 | [diff] [blame] | 3232 | return err; |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 3233 | |
| 3234 | recovery_tree_root: |
Jeff Mahoney | 3cdde22 | 2016-06-09 21:38:35 -0400 | [diff] [blame] | 3235 | if (!btrfs_test_opt(tree_root->fs_info, USEBACKUPROOT)) |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 3236 | goto fail_tree_roots; |
| 3237 | |
| 3238 | free_root_pointers(fs_info, 0); |
| 3239 | |
| 3240 | /* don't use the log in recovery mode, it won't be valid */ |
| 3241 | btrfs_set_super_log_root(disk_super, 0); |
| 3242 | |
| 3243 | /* we can't trust the free space cache either */ |
| 3244 | btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); |
| 3245 | |
| 3246 | ret = next_root_backup(fs_info, fs_info->super_copy, |
| 3247 | &num_backups_tried, &backup_index); |
| 3248 | if (ret == -1) |
| 3249 | goto fail_block_groups; |
| 3250 | goto retry_root_backup; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3251 | } |
| 3252 | |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3253 | static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) |
| 3254 | { |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3255 | if (uptodate) { |
| 3256 | set_buffer_uptodate(bh); |
| 3257 | } else { |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 3258 | struct btrfs_device *device = (struct btrfs_device *) |
| 3259 | bh->b_private; |
| 3260 | |
David Sterba | b14af3b | 2015-10-08 10:43:10 +0200 | [diff] [blame] | 3261 | btrfs_warn_rl_in_rcu(device->dev_root->fs_info, |
| 3262 | "lost page write due to IO error on %s", |
Josef Bacik | 606686e | 2012-06-04 14:03:51 -0400 | [diff] [blame] | 3263 | rcu_str_deref(device->name)); |
Nicholas D Steeves | 0132761 | 2016-05-19 21:18:45 -0400 | [diff] [blame] | 3264 | /* note, we don't set_buffer_write_io_error because we have |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3265 | * our own ways of dealing with the IO errors |
| 3266 | */ |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3267 | clear_buffer_uptodate(bh); |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 3268 | btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3269 | } |
| 3270 | unlock_buffer(bh); |
| 3271 | put_bh(bh); |
| 3272 | } |
| 3273 | |
Anand Jain | 29c36d7 | 2015-08-14 18:32:58 +0800 | [diff] [blame] | 3274 | int btrfs_read_dev_one_super(struct block_device *bdev, int copy_num, |
| 3275 | struct buffer_head **bh_ret) |
| 3276 | { |
| 3277 | struct buffer_head *bh; |
| 3278 | struct btrfs_super_block *super; |
| 3279 | u64 bytenr; |
| 3280 | |
| 3281 | bytenr = btrfs_sb_offset(copy_num); |
| 3282 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= i_size_read(bdev->bd_inode)) |
| 3283 | return -EINVAL; |
| 3284 | |
| 3285 | bh = __bread(bdev, bytenr / 4096, BTRFS_SUPER_INFO_SIZE); |
| 3286 | /* |
| 3287 | * If we fail to read from the underlying devices, as of now |
| 3288 | * the best option we have is to mark it EIO. |
| 3289 | */ |
| 3290 | if (!bh) |
| 3291 | return -EIO; |
| 3292 | |
| 3293 | super = (struct btrfs_super_block *)bh->b_data; |
| 3294 | if (btrfs_super_bytenr(super) != bytenr || |
| 3295 | btrfs_super_magic(super) != BTRFS_MAGIC) { |
| 3296 | brelse(bh); |
| 3297 | return -EINVAL; |
| 3298 | } |
| 3299 | |
| 3300 | *bh_ret = bh; |
| 3301 | return 0; |
| 3302 | } |
| 3303 | |
| 3304 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3305 | struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) |
| 3306 | { |
| 3307 | struct buffer_head *bh; |
| 3308 | struct buffer_head *latest = NULL; |
| 3309 | struct btrfs_super_block *super; |
| 3310 | int i; |
| 3311 | u64 transid = 0; |
Anand Jain | 92fc03f | 2015-08-14 18:32:51 +0800 | [diff] [blame] | 3312 | int ret = -EINVAL; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3313 | |
| 3314 | /* we would like to check all the supers, but that would make |
| 3315 | * a btrfs mount succeed after a mkfs from a different FS. |
| 3316 | * So, we need to add a special mount option to scan for |
| 3317 | * later supers, using BTRFS_SUPER_MIRROR_MAX instead |
| 3318 | */ |
| 3319 | for (i = 0; i < 1; i++) { |
Anand Jain | 29c36d7 | 2015-08-14 18:32:58 +0800 | [diff] [blame] | 3320 | ret = btrfs_read_dev_one_super(bdev, i, &bh); |
| 3321 | if (ret) |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3322 | continue; |
| 3323 | |
| 3324 | super = (struct btrfs_super_block *)bh->b_data; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3325 | |
| 3326 | if (!latest || btrfs_super_generation(super) > transid) { |
| 3327 | brelse(latest); |
| 3328 | latest = bh; |
| 3329 | transid = btrfs_super_generation(super); |
| 3330 | } else { |
| 3331 | brelse(bh); |
| 3332 | } |
| 3333 | } |
Anand Jain | 92fc03f | 2015-08-14 18:32:51 +0800 | [diff] [blame] | 3334 | |
| 3335 | if (!latest) |
| 3336 | return ERR_PTR(ret); |
| 3337 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3338 | return latest; |
| 3339 | } |
| 3340 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 3341 | /* |
| 3342 | * this should be called twice, once with wait == 0 and |
| 3343 | * once with wait == 1. When wait == 0 is done, all the buffer heads |
| 3344 | * we write are pinned. |
| 3345 | * |
| 3346 | * They are released when wait == 1 is done. |
| 3347 | * max_mirrors must be the same for both runs, and it indicates how |
| 3348 | * many supers on this one device should be written. |
| 3349 | * |
| 3350 | * max_mirrors == 0 means to write them all. |
| 3351 | */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3352 | static int write_dev_supers(struct btrfs_device *device, |
| 3353 | struct btrfs_super_block *sb, |
| 3354 | int do_barriers, int wait, int max_mirrors) |
| 3355 | { |
| 3356 | struct buffer_head *bh; |
| 3357 | int i; |
| 3358 | int ret; |
| 3359 | int errors = 0; |
| 3360 | u32 crc; |
| 3361 | u64 bytenr; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3362 | |
| 3363 | if (max_mirrors == 0) |
| 3364 | max_mirrors = BTRFS_SUPER_MIRROR_MAX; |
| 3365 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3366 | for (i = 0; i < max_mirrors; i++) { |
| 3367 | bytenr = btrfs_sb_offset(i); |
Miao Xie | 935e5cc | 2014-09-03 21:35:33 +0800 | [diff] [blame] | 3368 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= |
| 3369 | device->commit_total_bytes) |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3370 | break; |
| 3371 | |
| 3372 | if (wait) { |
| 3373 | bh = __find_get_block(device->bdev, bytenr / 4096, |
| 3374 | BTRFS_SUPER_INFO_SIZE); |
Josef Bacik | 634554d | 2013-04-29 10:05:57 -0400 | [diff] [blame] | 3375 | if (!bh) { |
| 3376 | errors++; |
| 3377 | continue; |
| 3378 | } |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3379 | wait_on_buffer(bh); |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 3380 | if (!buffer_uptodate(bh)) |
| 3381 | errors++; |
| 3382 | |
| 3383 | /* drop our reference */ |
| 3384 | brelse(bh); |
| 3385 | |
| 3386 | /* drop the reference from the wait == 0 run */ |
| 3387 | brelse(bh); |
| 3388 | continue; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3389 | } else { |
| 3390 | btrfs_set_super_bytenr(sb, bytenr); |
| 3391 | |
| 3392 | crc = ~(u32)0; |
Liu Bo | b049668 | 2013-03-14 14:57:45 +0000 | [diff] [blame] | 3393 | crc = btrfs_csum_data((char *)sb + |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3394 | BTRFS_CSUM_SIZE, crc, |
| 3395 | BTRFS_SUPER_INFO_SIZE - |
| 3396 | BTRFS_CSUM_SIZE); |
| 3397 | btrfs_csum_final(crc, sb->csum); |
| 3398 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 3399 | /* |
| 3400 | * one reference for us, and we leave it for the |
| 3401 | * caller |
| 3402 | */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3403 | bh = __getblk(device->bdev, bytenr / 4096, |
| 3404 | BTRFS_SUPER_INFO_SIZE); |
Josef Bacik | 634554d | 2013-04-29 10:05:57 -0400 | [diff] [blame] | 3405 | if (!bh) { |
David Sterba | f14d104 | 2015-10-08 11:37:06 +0200 | [diff] [blame] | 3406 | btrfs_err(device->dev_root->fs_info, |
| 3407 | "couldn't get super buffer head for bytenr %llu", |
| 3408 | bytenr); |
Josef Bacik | 634554d | 2013-04-29 10:05:57 -0400 | [diff] [blame] | 3409 | errors++; |
| 3410 | continue; |
| 3411 | } |
| 3412 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3413 | memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); |
| 3414 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 3415 | /* one reference for submit_bh */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3416 | get_bh(bh); |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 3417 | |
| 3418 | set_buffer_uptodate(bh); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3419 | lock_buffer(bh); |
| 3420 | bh->b_end_io = btrfs_end_buffer_write_sync; |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 3421 | bh->b_private = device; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3422 | } |
| 3423 | |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3424 | /* |
| 3425 | * we fua the first super. The others we allow |
| 3426 | * to go down lazy. |
| 3427 | */ |
Wang Shilong | e8117c2 | 2014-01-03 18:22:57 +0800 | [diff] [blame] | 3428 | if (i == 0) |
| 3429 | ret = btrfsic_submit_bh(WRITE_FUA, bh); |
| 3430 | else |
| 3431 | ret = btrfsic_submit_bh(WRITE_SYNC, bh); |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 3432 | if (ret) |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3433 | errors++; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3434 | } |
| 3435 | return errors < i ? 0 : -1; |
| 3436 | } |
| 3437 | |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3438 | /* |
| 3439 | * endio for the write_dev_flush, this will wake anyone waiting |
| 3440 | * for the barrier when it is done |
| 3441 | */ |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 3442 | static void btrfs_end_empty_barrier(struct bio *bio) |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3443 | { |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3444 | if (bio->bi_private) |
| 3445 | complete(bio->bi_private); |
| 3446 | bio_put(bio); |
| 3447 | } |
| 3448 | |
| 3449 | /* |
| 3450 | * trigger flushes for one the devices. If you pass wait == 0, the flushes are |
| 3451 | * sent down. With wait == 1, it waits for the previous flush. |
| 3452 | * |
| 3453 | * any device where the flush fails with eopnotsupp are flagged as not-barrier |
| 3454 | * capable |
| 3455 | */ |
| 3456 | static int write_dev_flush(struct btrfs_device *device, int wait) |
| 3457 | { |
| 3458 | struct bio *bio; |
| 3459 | int ret = 0; |
| 3460 | |
| 3461 | if (device->nobarriers) |
| 3462 | return 0; |
| 3463 | |
| 3464 | if (wait) { |
| 3465 | bio = device->flush_bio; |
| 3466 | if (!bio) |
| 3467 | return 0; |
| 3468 | |
| 3469 | wait_for_completion(&device->flush_wait); |
| 3470 | |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 3471 | if (bio->bi_error) { |
| 3472 | ret = bio->bi_error; |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3473 | btrfs_dev_stat_inc_and_print(device, |
| 3474 | BTRFS_DEV_STAT_FLUSH_ERRS); |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3475 | } |
| 3476 | |
| 3477 | /* drop the reference from the wait == 0 run */ |
| 3478 | bio_put(bio); |
| 3479 | device->flush_bio = NULL; |
| 3480 | |
| 3481 | return ret; |
| 3482 | } |
| 3483 | |
| 3484 | /* |
| 3485 | * one reference for us, and we leave it for the |
| 3486 | * caller |
| 3487 | */ |
Jesper Juhl | 9c017ab | 2012-02-27 00:04:56 +0100 | [diff] [blame] | 3488 | device->flush_bio = NULL; |
Chris Mason | 9be3395 | 2013-05-17 18:30:14 -0400 | [diff] [blame] | 3489 | bio = btrfs_io_bio_alloc(GFP_NOFS, 0); |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3490 | if (!bio) |
| 3491 | return -ENOMEM; |
| 3492 | |
| 3493 | bio->bi_end_io = btrfs_end_empty_barrier; |
| 3494 | bio->bi_bdev = device->bdev; |
| 3495 | init_completion(&device->flush_wait); |
| 3496 | bio->bi_private = &device->flush_wait; |
| 3497 | device->flush_bio = bio; |
| 3498 | |
| 3499 | bio_get(bio); |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 3500 | btrfsic_submit_bio(WRITE_FLUSH, bio); |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3501 | |
| 3502 | return 0; |
| 3503 | } |
| 3504 | |
| 3505 | /* |
| 3506 | * send an empty flush down to each device in parallel, |
| 3507 | * then wait for them |
| 3508 | */ |
| 3509 | static int barrier_all_devices(struct btrfs_fs_info *info) |
| 3510 | { |
| 3511 | struct list_head *head; |
| 3512 | struct btrfs_device *dev; |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3513 | int errors_send = 0; |
| 3514 | int errors_wait = 0; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3515 | int ret; |
| 3516 | |
| 3517 | /* send down all the barriers */ |
| 3518 | head = &info->fs_devices->devices; |
| 3519 | list_for_each_entry_rcu(dev, head, dev_list) { |
Hidetoshi Seto | f88ba6a | 2014-02-05 16:34:38 +0900 | [diff] [blame] | 3520 | if (dev->missing) |
| 3521 | continue; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3522 | if (!dev->bdev) { |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3523 | errors_send++; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3524 | continue; |
| 3525 | } |
| 3526 | if (!dev->in_fs_metadata || !dev->writeable) |
| 3527 | continue; |
| 3528 | |
| 3529 | ret = write_dev_flush(dev, 0); |
| 3530 | if (ret) |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3531 | errors_send++; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3532 | } |
| 3533 | |
| 3534 | /* wait for all the barriers */ |
| 3535 | list_for_each_entry_rcu(dev, head, dev_list) { |
Hidetoshi Seto | f88ba6a | 2014-02-05 16:34:38 +0900 | [diff] [blame] | 3536 | if (dev->missing) |
| 3537 | continue; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3538 | if (!dev->bdev) { |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3539 | errors_wait++; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3540 | continue; |
| 3541 | } |
| 3542 | if (!dev->in_fs_metadata || !dev->writeable) |
| 3543 | continue; |
| 3544 | |
| 3545 | ret = write_dev_flush(dev, 1); |
| 3546 | if (ret) |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3547 | errors_wait++; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3548 | } |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3549 | if (errors_send > info->num_tolerated_disk_barrier_failures || |
| 3550 | errors_wait > info->num_tolerated_disk_barrier_failures) |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3551 | return -EIO; |
| 3552 | return 0; |
| 3553 | } |
| 3554 | |
Zhao Lei | 943c6e9 | 2015-08-19 15:54:15 +0800 | [diff] [blame] | 3555 | int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags) |
| 3556 | { |
Zhao Lei | 8789f4f | 2015-09-15 21:08:07 +0800 | [diff] [blame] | 3557 | int raid_type; |
| 3558 | int min_tolerated = INT_MAX; |
Zhao Lei | 943c6e9 | 2015-08-19 15:54:15 +0800 | [diff] [blame] | 3559 | |
Zhao Lei | 8789f4f | 2015-09-15 21:08:07 +0800 | [diff] [blame] | 3560 | if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 || |
| 3561 | (flags & BTRFS_AVAIL_ALLOC_BIT_SINGLE)) |
| 3562 | min_tolerated = min(min_tolerated, |
| 3563 | btrfs_raid_array[BTRFS_RAID_SINGLE]. |
| 3564 | tolerated_failures); |
Zhao Lei | 943c6e9 | 2015-08-19 15:54:15 +0800 | [diff] [blame] | 3565 | |
Zhao Lei | 8789f4f | 2015-09-15 21:08:07 +0800 | [diff] [blame] | 3566 | for (raid_type = 0; raid_type < BTRFS_NR_RAID_TYPES; raid_type++) { |
| 3567 | if (raid_type == BTRFS_RAID_SINGLE) |
| 3568 | continue; |
| 3569 | if (!(flags & btrfs_raid_group[raid_type])) |
| 3570 | continue; |
| 3571 | min_tolerated = min(min_tolerated, |
| 3572 | btrfs_raid_array[raid_type]. |
| 3573 | tolerated_failures); |
| 3574 | } |
Zhao Lei | 943c6e9 | 2015-08-19 15:54:15 +0800 | [diff] [blame] | 3575 | |
Zhao Lei | 8789f4f | 2015-09-15 21:08:07 +0800 | [diff] [blame] | 3576 | if (min_tolerated == INT_MAX) { |
| 3577 | pr_warn("BTRFS: unknown raid flag: %llu\n", flags); |
| 3578 | min_tolerated = 0; |
| 3579 | } |
| 3580 | |
| 3581 | return min_tolerated; |
Zhao Lei | 943c6e9 | 2015-08-19 15:54:15 +0800 | [diff] [blame] | 3582 | } |
| 3583 | |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3584 | int btrfs_calc_num_tolerated_disk_barrier_failures( |
| 3585 | struct btrfs_fs_info *fs_info) |
| 3586 | { |
| 3587 | struct btrfs_ioctl_space_info space; |
| 3588 | struct btrfs_space_info *sinfo; |
| 3589 | u64 types[] = {BTRFS_BLOCK_GROUP_DATA, |
| 3590 | BTRFS_BLOCK_GROUP_SYSTEM, |
| 3591 | BTRFS_BLOCK_GROUP_METADATA, |
| 3592 | BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3593 | int i; |
| 3594 | int c; |
| 3595 | int num_tolerated_disk_barrier_failures = |
| 3596 | (int)fs_info->fs_devices->num_devices; |
| 3597 | |
Zhao Lei | 2c45804 | 2015-07-16 15:00:46 +0800 | [diff] [blame] | 3598 | for (i = 0; i < ARRAY_SIZE(types); i++) { |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3599 | struct btrfs_space_info *tmp; |
| 3600 | |
| 3601 | sinfo = NULL; |
| 3602 | rcu_read_lock(); |
| 3603 | list_for_each_entry_rcu(tmp, &fs_info->space_info, list) { |
| 3604 | if (tmp->flags == types[i]) { |
| 3605 | sinfo = tmp; |
| 3606 | break; |
| 3607 | } |
| 3608 | } |
| 3609 | rcu_read_unlock(); |
| 3610 | |
| 3611 | if (!sinfo) |
| 3612 | continue; |
| 3613 | |
| 3614 | down_read(&sinfo->groups_sem); |
| 3615 | for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { |
Zhao Lei | 2c45804 | 2015-07-16 15:00:46 +0800 | [diff] [blame] | 3616 | u64 flags; |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3617 | |
Zhao Lei | 2c45804 | 2015-07-16 15:00:46 +0800 | [diff] [blame] | 3618 | if (list_empty(&sinfo->block_groups[c])) |
| 3619 | continue; |
| 3620 | |
| 3621 | btrfs_get_block_group_info(&sinfo->block_groups[c], |
| 3622 | &space); |
| 3623 | if (space.total_bytes == 0 || space.used_bytes == 0) |
| 3624 | continue; |
| 3625 | flags = space.flags; |
Zhao Lei | 943c6e9 | 2015-08-19 15:54:15 +0800 | [diff] [blame] | 3626 | |
| 3627 | num_tolerated_disk_barrier_failures = min( |
| 3628 | num_tolerated_disk_barrier_failures, |
| 3629 | btrfs_get_num_tolerated_disk_barrier_failures( |
| 3630 | flags)); |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3631 | } |
| 3632 | up_read(&sinfo->groups_sem); |
| 3633 | } |
| 3634 | |
| 3635 | return num_tolerated_disk_barrier_failures; |
| 3636 | } |
| 3637 | |
Eric Sandeen | 48a3b63 | 2013-04-25 20:41:01 +0000 | [diff] [blame] | 3638 | static int write_all_supers(struct btrfs_root *root, int max_mirrors) |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3639 | { |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 3640 | struct list_head *head; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3641 | struct btrfs_device *dev; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3642 | struct btrfs_super_block *sb; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3643 | struct btrfs_dev_item *dev_item; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3644 | int ret; |
| 3645 | int do_barriers; |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3646 | int max_errors; |
| 3647 | int total_errors = 0; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3648 | u64 flags; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3649 | |
Jeff Mahoney | 3cdde22 | 2016-06-09 21:38:35 -0400 | [diff] [blame] | 3650 | do_barriers = !btrfs_test_opt(root->fs_info, NOBARRIER); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 3651 | backup_super_roots(root->fs_info); |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3652 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 3653 | sb = root->fs_info->super_for_commit; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3654 | dev_item = &sb->dev_item; |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 3655 | |
Chris Mason | 174ba50 | 2011-05-27 10:03:58 -0400 | [diff] [blame] | 3656 | mutex_lock(&root->fs_info->fs_devices->device_list_mutex); |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 3657 | head = &root->fs_info->fs_devices->devices; |
Filipe David Borba Manana | d730680 | 2013-08-09 15:41:36 +0100 | [diff] [blame] | 3658 | max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3659 | |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3660 | if (do_barriers) { |
| 3661 | ret = barrier_all_devices(root->fs_info); |
| 3662 | if (ret) { |
| 3663 | mutex_unlock( |
| 3664 | &root->fs_info->fs_devices->device_list_mutex); |
Anand Jain | 34d9700 | 2016-03-16 16:43:06 +0800 | [diff] [blame] | 3665 | btrfs_handle_fs_error(root->fs_info, ret, |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3666 | "errors while submitting device barriers."); |
| 3667 | return ret; |
| 3668 | } |
| 3669 | } |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3670 | |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 3671 | list_for_each_entry_rcu(dev, head, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 3672 | if (!dev->bdev) { |
| 3673 | total_errors++; |
| 3674 | continue; |
| 3675 | } |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 3676 | if (!dev->in_fs_metadata || !dev->writeable) |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 3677 | continue; |
| 3678 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 3679 | btrfs_set_stack_device_generation(dev_item, 0); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3680 | btrfs_set_stack_device_type(dev_item, dev->type); |
| 3681 | btrfs_set_stack_device_id(dev_item, dev->devid); |
Miao Xie | 7df69d3 | 2014-07-24 11:37:13 +0800 | [diff] [blame] | 3682 | btrfs_set_stack_device_total_bytes(dev_item, |
Miao Xie | 935e5cc | 2014-09-03 21:35:33 +0800 | [diff] [blame] | 3683 | dev->commit_total_bytes); |
Miao Xie | ce7213c | 2014-09-03 21:35:34 +0800 | [diff] [blame] | 3684 | btrfs_set_stack_device_bytes_used(dev_item, |
| 3685 | dev->commit_bytes_used); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3686 | btrfs_set_stack_device_io_align(dev_item, dev->io_align); |
| 3687 | btrfs_set_stack_device_io_width(dev_item, dev->io_width); |
| 3688 | btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); |
| 3689 | memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 3690 | memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3691 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3692 | flags = btrfs_super_flags(sb); |
| 3693 | btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3694 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3695 | ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3696 | if (ret) |
| 3697 | total_errors++; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3698 | } |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3699 | if (total_errors > max_errors) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 3700 | btrfs_err(root->fs_info, "%d errors while writing supers", |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3701 | total_errors); |
Stefan Behrens | a724b43 | 2013-09-11 09:59:22 +0200 | [diff] [blame] | 3702 | mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3703 | |
Stefan Behrens | 9d565ba | 2013-08-09 17:08:40 +0200 | [diff] [blame] | 3704 | /* FUA is masked off if unsupported and can't be the reason */ |
Anand Jain | 34d9700 | 2016-03-16 16:43:06 +0800 | [diff] [blame] | 3705 | btrfs_handle_fs_error(root->fs_info, -EIO, |
Stefan Behrens | 9d565ba | 2013-08-09 17:08:40 +0200 | [diff] [blame] | 3706 | "%d errors while writing supers", total_errors); |
| 3707 | return -EIO; |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3708 | } |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3709 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3710 | total_errors = 0; |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 3711 | list_for_each_entry_rcu(dev, head, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 3712 | if (!dev->bdev) |
| 3713 | continue; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 3714 | if (!dev->in_fs_metadata || !dev->writeable) |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 3715 | continue; |
| 3716 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3717 | ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); |
| 3718 | if (ret) |
| 3719 | total_errors++; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3720 | } |
Chris Mason | 174ba50 | 2011-05-27 10:03:58 -0400 | [diff] [blame] | 3721 | mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3722 | if (total_errors > max_errors) { |
Anand Jain | 34d9700 | 2016-03-16 16:43:06 +0800 | [diff] [blame] | 3723 | btrfs_handle_fs_error(root->fs_info, -EIO, |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3724 | "%d errors while writing supers", total_errors); |
| 3725 | return -EIO; |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3726 | } |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3727 | return 0; |
| 3728 | } |
| 3729 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3730 | int write_ctree_super(struct btrfs_trans_handle *trans, |
| 3731 | struct btrfs_root *root, int max_mirrors) |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 3732 | { |
Rashika | f570e757 | 2013-10-31 16:50:42 +0530 | [diff] [blame] | 3733 | return write_all_supers(root, max_mirrors); |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 3734 | } |
| 3735 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 3736 | /* Drop a fs root from the radix tree and free it. */ |
| 3737 | void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, |
| 3738 | struct btrfs_root *root) |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 3739 | { |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3740 | spin_lock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 3741 | radix_tree_delete(&fs_info->fs_roots_radix, |
| 3742 | (unsigned long)root->root_key.objectid); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3743 | spin_unlock(&fs_info->fs_roots_radix_lock); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 3744 | |
| 3745 | if (btrfs_root_refs(&root->root_item) == 0) |
| 3746 | synchronize_srcu(&fs_info->subvol_srcu); |
| 3747 | |
Liu Bo | 1a4319c | 2014-01-13 19:53:53 +0800 | [diff] [blame] | 3748 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) |
Liu Bo | 3321719 | 2013-02-27 13:28:24 +0000 | [diff] [blame] | 3749 | btrfs_free_log(NULL, root); |
Liu Bo | 3321719 | 2013-02-27 13:28:24 +0000 | [diff] [blame] | 3750 | |
Josef Bacik | faa2dbf | 2014-05-07 17:06:09 -0400 | [diff] [blame] | 3751 | if (root->free_ino_pinned) |
| 3752 | __btrfs_remove_free_space_cache(root->free_ino_pinned); |
| 3753 | if (root->free_ino_ctl) |
| 3754 | __btrfs_remove_free_space_cache(root->free_ino_ctl); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3755 | free_fs_root(root); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3756 | } |
| 3757 | |
| 3758 | static void free_fs_root(struct btrfs_root *root) |
| 3759 | { |
David Sterba | 57cdc8d | 2014-02-05 02:37:48 +0100 | [diff] [blame] | 3760 | iput(root->ino_cache_inode); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3761 | WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); |
Filipe David Borba Manana | 1cb048f | 2013-08-20 00:52:51 +0100 | [diff] [blame] | 3762 | btrfs_free_block_rsv(root, root->orphan_block_rsv); |
| 3763 | root->orphan_block_rsv = NULL; |
Al Viro | 0ee5dc6 | 2011-07-07 15:44:25 -0400 | [diff] [blame] | 3764 | if (root->anon_dev) |
| 3765 | free_anon_bdev(root->anon_dev); |
Miao Xie | 8257b2d | 2014-03-06 13:38:19 +0800 | [diff] [blame] | 3766 | if (root->subv_writers) |
| 3767 | btrfs_free_subvolume_writers(root->subv_writers); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3768 | free_extent_buffer(root->node); |
| 3769 | free_extent_buffer(root->commit_root); |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 3770 | kfree(root->free_ino_ctl); |
| 3771 | kfree(root->free_ino_pinned); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3772 | kfree(root->name); |
Miao Xie | b0feb9d | 2013-05-15 07:48:20 +0000 | [diff] [blame] | 3773 | btrfs_put_fs_root(root); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 3774 | } |
| 3775 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 3776 | void btrfs_free_fs_root(struct btrfs_root *root) |
| 3777 | { |
| 3778 | free_fs_root(root); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3779 | } |
| 3780 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3781 | int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) |
| 3782 | { |
| 3783 | u64 root_objectid = 0; |
| 3784 | struct btrfs_root *gang[8]; |
Qu Wenruo | 65d33fd | 2014-04-22 17:13:51 +0800 | [diff] [blame] | 3785 | int i = 0; |
| 3786 | int err = 0; |
| 3787 | unsigned int ret = 0; |
| 3788 | int index; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3789 | |
| 3790 | while (1) { |
Qu Wenruo | 65d33fd | 2014-04-22 17:13:51 +0800 | [diff] [blame] | 3791 | index = srcu_read_lock(&fs_info->subvol_srcu); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3792 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
| 3793 | (void **)gang, root_objectid, |
| 3794 | ARRAY_SIZE(gang)); |
Qu Wenruo | 65d33fd | 2014-04-22 17:13:51 +0800 | [diff] [blame] | 3795 | if (!ret) { |
| 3796 | srcu_read_unlock(&fs_info->subvol_srcu, index); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3797 | break; |
Qu Wenruo | 65d33fd | 2014-04-22 17:13:51 +0800 | [diff] [blame] | 3798 | } |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 3799 | root_objectid = gang[ret - 1]->root_key.objectid + 1; |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 3800 | |
Qu Wenruo | 65d33fd | 2014-04-22 17:13:51 +0800 | [diff] [blame] | 3801 | for (i = 0; i < ret; i++) { |
| 3802 | /* Avoid to grab roots in dead_roots */ |
| 3803 | if (btrfs_root_refs(&gang[i]->root_item) == 0) { |
| 3804 | gang[i] = NULL; |
| 3805 | continue; |
| 3806 | } |
| 3807 | /* grab all the search result for later use */ |
| 3808 | gang[i] = btrfs_grab_fs_root(gang[i]); |
| 3809 | } |
| 3810 | srcu_read_unlock(&fs_info->subvol_srcu, index); |
| 3811 | |
| 3812 | for (i = 0; i < ret; i++) { |
| 3813 | if (!gang[i]) |
| 3814 | continue; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3815 | root_objectid = gang[i]->root_key.objectid; |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 3816 | err = btrfs_orphan_cleanup(gang[i]); |
| 3817 | if (err) |
Qu Wenruo | 65d33fd | 2014-04-22 17:13:51 +0800 | [diff] [blame] | 3818 | break; |
| 3819 | btrfs_put_fs_root(gang[i]); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3820 | } |
| 3821 | root_objectid++; |
| 3822 | } |
Qu Wenruo | 65d33fd | 2014-04-22 17:13:51 +0800 | [diff] [blame] | 3823 | |
| 3824 | /* release the uncleaned roots due to error */ |
| 3825 | for (; i < ret; i++) { |
| 3826 | if (gang[i]) |
| 3827 | btrfs_put_fs_root(gang[i]); |
| 3828 | } |
| 3829 | return err; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3830 | } |
| 3831 | |
| 3832 | int btrfs_commit_super(struct btrfs_root *root) |
| 3833 | { |
| 3834 | struct btrfs_trans_handle *trans; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3835 | |
| 3836 | mutex_lock(&root->fs_info->cleaner_mutex); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 3837 | btrfs_run_delayed_iputs(root); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3838 | mutex_unlock(&root->fs_info->cleaner_mutex); |
David Sterba | 9d1a2a3 | 2013-03-12 15:13:28 +0000 | [diff] [blame] | 3839 | wake_up_process(root->fs_info->cleaner_kthread); |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 3840 | |
| 3841 | /* wait until ongoing cleanup work done */ |
| 3842 | down_write(&root->fs_info->cleanup_work_sem); |
| 3843 | up_write(&root->fs_info->cleanup_work_sem); |
| 3844 | |
Josef Bacik | 7a7eaa4 | 2011-04-13 12:54:33 -0400 | [diff] [blame] | 3845 | trans = btrfs_join_transaction(root); |
Tsutomu Itoh | 3612b49 | 2011-01-25 02:51:38 +0000 | [diff] [blame] | 3846 | if (IS_ERR(trans)) |
| 3847 | return PTR_ERR(trans); |
Liu Bo | d52c1bc | 2013-11-05 11:45:53 +0800 | [diff] [blame] | 3848 | return btrfs_commit_transaction(trans, root); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3849 | } |
| 3850 | |
David Sterba | 3abdbd7 | 2014-06-04 18:10:45 +0200 | [diff] [blame] | 3851 | void close_ctree(struct btrfs_root *root) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3852 | { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 3853 | struct btrfs_fs_info *fs_info = root->fs_info; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3854 | int ret; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 3855 | |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 3856 | fs_info->closing = 1; |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 3857 | smp_mb(); |
| 3858 | |
Justin Maggard | 7343dd6 | 2015-11-04 15:56:16 -0800 | [diff] [blame] | 3859 | /* wait for the qgroup rescan worker to stop */ |
| 3860 | btrfs_qgroup_wait_for_completion(fs_info); |
| 3861 | |
Stefan Behrens | 803b2f5 | 2013-08-15 17:11:21 +0200 | [diff] [blame] | 3862 | /* wait for the uuid_scan task to finish */ |
| 3863 | down(&fs_info->uuid_tree_rescan_sem); |
| 3864 | /* avoid complains from lockdep et al., set sem back to initial state */ |
| 3865 | up(&fs_info->uuid_tree_rescan_sem); |
| 3866 | |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 3867 | /* pause restriper - we want to resume on mount */ |
Stefan Behrens | aa1b8cd | 2012-11-05 17:03:39 +0100 | [diff] [blame] | 3868 | btrfs_pause_balance(fs_info); |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 3869 | |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 3870 | btrfs_dev_replace_suspend_for_unmount(fs_info); |
| 3871 | |
Stefan Behrens | aa1b8cd | 2012-11-05 17:03:39 +0100 | [diff] [blame] | 3872 | btrfs_scrub_cancel(fs_info); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 3873 | |
| 3874 | /* wait for any defraggers to finish */ |
| 3875 | wait_event(fs_info->transaction_wait, |
| 3876 | (atomic_read(&fs_info->defrag_running) == 0)); |
| 3877 | |
| 3878 | /* clear out the rbtree of defraggable inodes */ |
Miao Xie | 26176e7 | 2012-11-26 09:26:20 +0000 | [diff] [blame] | 3879 | btrfs_cleanup_defrag_inodes(fs_info); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 3880 | |
Miao Xie | 21c7e75 | 2014-05-13 17:29:04 -0700 | [diff] [blame] | 3881 | cancel_work_sync(&fs_info->async_reclaim_work); |
| 3882 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3883 | if (!(fs_info->sb->s_flags & MS_RDONLY)) { |
Jeff Mahoney | e44163e | 2015-06-15 09:41:18 -0400 | [diff] [blame] | 3884 | /* |
| 3885 | * If the cleaner thread is stopped and there are |
| 3886 | * block groups queued for removal, the deletion will be |
| 3887 | * skipped when we quit the cleaner thread. |
| 3888 | */ |
Jeff Mahoney | e44163e | 2015-06-15 09:41:18 -0400 | [diff] [blame] | 3889 | btrfs_delete_unused_bgs(root->fs_info); |
Jeff Mahoney | e44163e | 2015-06-15 09:41:18 -0400 | [diff] [blame] | 3890 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3891 | ret = btrfs_commit_super(root); |
| 3892 | if (ret) |
Eric Sandeen | 0489234 | 2014-08-01 18:12:36 -0500 | [diff] [blame] | 3893 | btrfs_err(fs_info, "commit super ret %d", ret); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3894 | } |
| 3895 | |
Miao Xie | 87533c4 | 2013-01-29 10:14:48 +0000 | [diff] [blame] | 3896 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) |
Stefan Behrens | 68ce968 | 2012-08-01 05:45:52 -0600 | [diff] [blame] | 3897 | btrfs_error_commit_super(root); |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 3898 | |
Al Viro | e3029d9 | 2011-11-17 00:56:18 -0500 | [diff] [blame] | 3899 | kthread_stop(fs_info->transaction_kthread); |
| 3900 | kthread_stop(fs_info->cleaner_kthread); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 3901 | |
Yan Zheng | f25784b | 2009-07-28 08:41:57 -0400 | [diff] [blame] | 3902 | fs_info->closing = 2; |
| 3903 | smp_mb(); |
| 3904 | |
Eric Sandeen | 0489234 | 2014-08-01 18:12:36 -0500 | [diff] [blame] | 3905 | btrfs_free_qgroup_config(fs_info); |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 3906 | |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 3907 | if (percpu_counter_sum(&fs_info->delalloc_bytes)) { |
Eric Sandeen | 0489234 | 2014-08-01 18:12:36 -0500 | [diff] [blame] | 3908 | btrfs_info(fs_info, "at unmount delalloc count %lld", |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 3909 | percpu_counter_sum(&fs_info->delalloc_bytes)); |
Chris Mason | b0c68f8 | 2008-01-31 11:05:37 -0500 | [diff] [blame] | 3910 | } |
Yan | bcc63ab | 2008-07-30 16:29:20 -0400 | [diff] [blame] | 3911 | |
Anand Jain | 6618a59 | 2015-08-14 18:32:47 +0800 | [diff] [blame] | 3912 | btrfs_sysfs_remove_mounted(fs_info); |
Anand Jain | b7c35e8 | 2015-03-10 06:38:38 +0800 | [diff] [blame] | 3913 | btrfs_sysfs_remove_fsid(fs_info->fs_devices); |
Jeff Mahoney | 5ac1d20 | 2013-11-01 13:06:58 -0400 | [diff] [blame] | 3914 | |
Josef Bacik | faa2dbf | 2014-05-07 17:06:09 -0400 | [diff] [blame] | 3915 | btrfs_free_fs_roots(fs_info); |
Chris Mason | d10c5f3 | 2007-12-17 20:14:04 -0500 | [diff] [blame] | 3916 | |
Liu Bo | 1a4319c | 2014-01-13 19:53:53 +0800 | [diff] [blame] | 3917 | btrfs_put_block_group_cache(fs_info); |
| 3918 | |
Josef Bacik | 2b1360d | 2013-10-07 15:14:44 -0400 | [diff] [blame] | 3919 | btrfs_free_block_groups(fs_info); |
| 3920 | |
Wang Shilong | de348ee | 2014-04-09 19:23:22 +0800 | [diff] [blame] | 3921 | /* |
| 3922 | * we must make sure there is not any read request to |
| 3923 | * submit after we stopping all workers. |
| 3924 | */ |
| 3925 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); |
Josef Bacik | 9619249 | 2013-10-16 13:53:28 -0400 | [diff] [blame] | 3926 | btrfs_stop_all_workers(fs_info); |
| 3927 | |
Josef Bacik | 47ab2a6 | 2014-09-18 11:20:02 -0400 | [diff] [blame] | 3928 | fs_info->open = 0; |
Josef Bacik | 13e6c37 | 2013-05-30 16:55:44 -0400 | [diff] [blame] | 3929 | free_root_pointers(fs_info, 1); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 3930 | |
Josef Bacik | 13e6c37 | 2013-05-30 16:55:44 -0400 | [diff] [blame] | 3931 | iput(fs_info->btree_inode); |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 3932 | |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 3933 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
Jeff Mahoney | 3cdde22 | 2016-06-09 21:38:35 -0400 | [diff] [blame] | 3934 | if (btrfs_test_opt(root->fs_info, CHECK_INTEGRITY)) |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 3935 | btrfsic_unmount(root, fs_info->fs_devices); |
| 3936 | #endif |
| 3937 | |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 3938 | btrfs_close_devices(fs_info->fs_devices); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 3939 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
Chris Mason | b248a41 | 2008-04-14 09:48:18 -0400 | [diff] [blame] | 3940 | |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 3941 | percpu_counter_destroy(&fs_info->dirty_metadata_bytes); |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 3942 | percpu_counter_destroy(&fs_info->delalloc_bytes); |
Miao Xie | c404e0d | 2014-01-30 16:46:55 +0800 | [diff] [blame] | 3943 | percpu_counter_destroy(&fs_info->bio_counter); |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 3944 | bdi_destroy(&fs_info->bdi); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 3945 | cleanup_srcu_struct(&fs_info->subvol_srcu); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 3946 | |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 3947 | btrfs_free_stripe_hash_table(fs_info); |
| 3948 | |
Chris Mason | cdfb080 | 2015-04-06 18:17:00 -0700 | [diff] [blame] | 3949 | __btrfs_free_block_rsv(root->orphan_block_rsv); |
Filipe David Borba Manana | 1cb048f | 2013-08-20 00:52:51 +0100 | [diff] [blame] | 3950 | root->orphan_block_rsv = NULL; |
Filipe Manana | 0421682 | 2014-11-27 21:14:15 +0000 | [diff] [blame] | 3951 | |
| 3952 | lock_chunks(root); |
| 3953 | while (!list_empty(&fs_info->pinned_chunks)) { |
| 3954 | struct extent_map *em; |
| 3955 | |
| 3956 | em = list_first_entry(&fs_info->pinned_chunks, |
| 3957 | struct extent_map, list); |
| 3958 | list_del_init(&em->list); |
| 3959 | free_extent_map(em); |
| 3960 | } |
| 3961 | unlock_chunks(root); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3962 | } |
| 3963 | |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 3964 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, |
| 3965 | int atomic) |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 3966 | { |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3967 | int ret; |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 3968 | struct inode *btree_inode = buf->pages[0]->mapping->host; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3969 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 3970 | ret = extent_buffer_uptodate(buf); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3971 | if (!ret) |
| 3972 | return ret; |
| 3973 | |
| 3974 | ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 3975 | parent_transid, atomic); |
| 3976 | if (ret == -EAGAIN) |
| 3977 | return ret; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3978 | return !ret; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 3979 | } |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 3980 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 3981 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf) |
| 3982 | { |
Josef Bacik | 06ea65a | 2013-09-19 16:07:01 -0400 | [diff] [blame] | 3983 | struct btrfs_root *root; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 3984 | u64 transid = btrfs_header_generation(buf); |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 3985 | int was_dirty; |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 3986 | |
Josef Bacik | 06ea65a | 2013-09-19 16:07:01 -0400 | [diff] [blame] | 3987 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
| 3988 | /* |
| 3989 | * This is a fast path so only do this check if we have sanity tests |
| 3990 | * enabled. Normal people shouldn't be marking dummy buffers as dirty |
| 3991 | * outside of the sanity tests. |
| 3992 | */ |
| 3993 | if (unlikely(test_bit(EXTENT_BUFFER_DUMMY, &buf->bflags))) |
| 3994 | return; |
| 3995 | #endif |
| 3996 | root = BTRFS_I(buf->pages[0]->mapping->host)->root; |
Chris Mason | b9447ef | 2009-03-09 11:45:38 -0400 | [diff] [blame] | 3997 | btrfs_assert_tree_locked(buf); |
Julia Lawall | 31b1a2b | 2012-11-03 10:58:34 +0000 | [diff] [blame] | 3998 | if (transid != root->fs_info->generation) |
| 3999 | WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, " |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 4000 | "found %llu running %llu\n", |
Geert Uytterhoeven | c1c9ff7 | 2013-08-20 13:20:07 +0200 | [diff] [blame] | 4001 | buf->start, transid, root->fs_info->generation); |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 4002 | was_dirty = set_extent_buffer_dirty(buf); |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 4003 | if (!was_dirty) |
| 4004 | __percpu_counter_add(&root->fs_info->dirty_metadata_bytes, |
| 4005 | buf->len, |
| 4006 | root->fs_info->dirty_metadata_batch); |
Filipe Manana | 1f21ef0 | 2014-04-09 15:37:06 +0100 | [diff] [blame] | 4007 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
| 4008 | if (btrfs_header_level(buf) == 0 && check_leaf(root, buf)) { |
| 4009 | btrfs_print_leaf(root, buf); |
| 4010 | ASSERT(0); |
| 4011 | } |
| 4012 | #endif |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 4013 | } |
| 4014 | |
Liu Bo | b53d3f5 | 2012-11-14 14:34:34 +0000 | [diff] [blame] | 4015 | static void __btrfs_btree_balance_dirty(struct btrfs_root *root, |
| 4016 | int flush_delayed) |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 4017 | { |
Chris Mason | 188de64 | 2008-05-09 11:52:25 -0400 | [diff] [blame] | 4018 | /* |
| 4019 | * looks as though older kernels can get into trouble with |
| 4020 | * this code, they end up stuck in balance_dirty_pages forever |
| 4021 | */ |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 4022 | int ret; |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 4023 | |
Jens Axboe | 6933c02 | 2009-03-17 09:36:37 +0100 | [diff] [blame] | 4024 | if (current->flags & PF_MEMALLOC) |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 4025 | return; |
| 4026 | |
Liu Bo | b53d3f5 | 2012-11-14 14:34:34 +0000 | [diff] [blame] | 4027 | if (flush_delayed) |
| 4028 | btrfs_balance_delayed_items(root); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 4029 | |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 4030 | ret = percpu_counter_compare(&root->fs_info->dirty_metadata_bytes, |
| 4031 | BTRFS_DIRTY_METADATA_THRESH); |
| 4032 | if (ret > 0) { |
Namjae Jeon | d0e1d66 | 2012-12-11 16:00:21 -0800 | [diff] [blame] | 4033 | balance_dirty_pages_ratelimited( |
| 4034 | root->fs_info->btree_inode->i_mapping); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 4035 | } |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 4036 | } |
| 4037 | |
Liu Bo | b53d3f5 | 2012-11-14 14:34:34 +0000 | [diff] [blame] | 4038 | void btrfs_btree_balance_dirty(struct btrfs_root *root) |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 4039 | { |
Liu Bo | b53d3f5 | 2012-11-14 14:34:34 +0000 | [diff] [blame] | 4040 | __btrfs_btree_balance_dirty(root, 1); |
| 4041 | } |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 4042 | |
Liu Bo | b53d3f5 | 2012-11-14 14:34:34 +0000 | [diff] [blame] | 4043 | void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root) |
| 4044 | { |
| 4045 | __btrfs_btree_balance_dirty(root, 0); |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 4046 | } |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 4047 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 4048 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 4049 | { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 4050 | struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 4051 | return btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 4052 | } |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 4053 | |
David Sterba | fcd1f065 | 2012-03-06 00:06:18 +0100 | [diff] [blame] | 4054 | static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4055 | int read_only) |
| 4056 | { |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 4057 | struct btrfs_super_block *sb = fs_info->super_copy; |
Qu Wenruo | 319e4d0 | 2015-12-15 09:14:36 +0800 | [diff] [blame] | 4058 | u64 nodesize = btrfs_super_nodesize(sb); |
| 4059 | u64 sectorsize = btrfs_super_sectorsize(sb); |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 4060 | int ret = 0; |
| 4061 | |
Qu Wenruo | 319e4d0 | 2015-12-15 09:14:36 +0800 | [diff] [blame] | 4062 | if (btrfs_super_magic(sb) != BTRFS_MAGIC) { |
| 4063 | printk(KERN_ERR "BTRFS: no valid FS found\n"); |
| 4064 | ret = -EINVAL; |
| 4065 | } |
| 4066 | if (btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP) |
| 4067 | printk(KERN_WARNING "BTRFS: unrecognized super flag: %llu\n", |
| 4068 | btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP); |
David Sterba | 21e7626 | 2014-10-27 13:52:21 +0100 | [diff] [blame] | 4069 | if (btrfs_super_root_level(sb) >= BTRFS_MAX_LEVEL) { |
| 4070 | printk(KERN_ERR "BTRFS: tree_root level too big: %d >= %d\n", |
| 4071 | btrfs_super_root_level(sb), BTRFS_MAX_LEVEL); |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 4072 | ret = -EINVAL; |
| 4073 | } |
David Sterba | 21e7626 | 2014-10-27 13:52:21 +0100 | [diff] [blame] | 4074 | if (btrfs_super_chunk_root_level(sb) >= BTRFS_MAX_LEVEL) { |
| 4075 | printk(KERN_ERR "BTRFS: chunk_root level too big: %d >= %d\n", |
| 4076 | btrfs_super_chunk_root_level(sb), BTRFS_MAX_LEVEL); |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 4077 | ret = -EINVAL; |
| 4078 | } |
David Sterba | 21e7626 | 2014-10-27 13:52:21 +0100 | [diff] [blame] | 4079 | if (btrfs_super_log_root_level(sb) >= BTRFS_MAX_LEVEL) { |
| 4080 | printk(KERN_ERR "BTRFS: log_root level too big: %d >= %d\n", |
| 4081 | btrfs_super_log_root_level(sb), BTRFS_MAX_LEVEL); |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 4082 | ret = -EINVAL; |
| 4083 | } |
| 4084 | |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 4085 | /* |
Qu Wenruo | 319e4d0 | 2015-12-15 09:14:36 +0800 | [diff] [blame] | 4086 | * Check sectorsize and nodesize first, other check will need it. |
| 4087 | * Check all possible sectorsize(4K, 8K, 16K, 32K, 64K) here. |
David Sterba | 1104a88 | 2013-03-06 15:57:46 +0100 | [diff] [blame] | 4088 | */ |
Qu Wenruo | 319e4d0 | 2015-12-15 09:14:36 +0800 | [diff] [blame] | 4089 | if (!is_power_of_2(sectorsize) || sectorsize < 4096 || |
| 4090 | sectorsize > BTRFS_MAX_METADATA_BLOCKSIZE) { |
| 4091 | printk(KERN_ERR "BTRFS: invalid sectorsize %llu\n", sectorsize); |
David Sterba | 75d6ad3 | 2014-10-31 17:18:08 +0100 | [diff] [blame] | 4092 | ret = -EINVAL; |
| 4093 | } |
Qu Wenruo | 319e4d0 | 2015-12-15 09:14:36 +0800 | [diff] [blame] | 4094 | /* Only PAGE SIZE is supported yet */ |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 4095 | if (sectorsize != PAGE_SIZE) { |
Qu Wenruo | 319e4d0 | 2015-12-15 09:14:36 +0800 | [diff] [blame] | 4096 | printk(KERN_ERR "BTRFS: sectorsize %llu not supported yet, only support %lu\n", |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 4097 | sectorsize, PAGE_SIZE); |
Qu Wenruo | 319e4d0 | 2015-12-15 09:14:36 +0800 | [diff] [blame] | 4098 | ret = -EINVAL; |
| 4099 | } |
| 4100 | if (!is_power_of_2(nodesize) || nodesize < sectorsize || |
| 4101 | nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) { |
| 4102 | printk(KERN_ERR "BTRFS: invalid nodesize %llu\n", nodesize); |
| 4103 | ret = -EINVAL; |
| 4104 | } |
| 4105 | if (nodesize != le32_to_cpu(sb->__unused_leafsize)) { |
| 4106 | printk(KERN_ERR "BTRFS: invalid leafsize %u, should be %llu\n", |
| 4107 | le32_to_cpu(sb->__unused_leafsize), |
| 4108 | nodesize); |
| 4109 | ret = -EINVAL; |
| 4110 | } |
| 4111 | |
| 4112 | /* Root alignment check */ |
| 4113 | if (!IS_ALIGNED(btrfs_super_root(sb), sectorsize)) { |
| 4114 | printk(KERN_WARNING "BTRFS: tree_root block unaligned: %llu\n", |
| 4115 | btrfs_super_root(sb)); |
| 4116 | ret = -EINVAL; |
| 4117 | } |
| 4118 | if (!IS_ALIGNED(btrfs_super_chunk_root(sb), sectorsize)) { |
| 4119 | printk(KERN_WARNING "BTRFS: chunk_root block unaligned: %llu\n", |
| 4120 | btrfs_super_chunk_root(sb)); |
| 4121 | ret = -EINVAL; |
| 4122 | } |
| 4123 | if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) { |
| 4124 | printk(KERN_WARNING "BTRFS: log_root block unaligned: %llu\n", |
| 4125 | btrfs_super_log_root(sb)); |
David Sterba | 75d6ad3 | 2014-10-31 17:18:08 +0100 | [diff] [blame] | 4126 | ret = -EINVAL; |
| 4127 | } |
| 4128 | |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 4129 | if (memcmp(fs_info->fsid, sb->dev_item.fsid, BTRFS_UUID_SIZE) != 0) { |
| 4130 | printk(KERN_ERR "BTRFS: dev_item UUID does not match fsid: %pU != %pU\n", |
| 4131 | fs_info->fsid, sb->dev_item.fsid); |
| 4132 | ret = -EINVAL; |
| 4133 | } |
| 4134 | |
| 4135 | /* |
| 4136 | * Hint to catch really bogus numbers, bitflips or so, more exact checks are |
| 4137 | * done later |
| 4138 | */ |
Liu Bo | 99e3ecf | 2016-06-03 12:05:14 -0700 | [diff] [blame] | 4139 | if (btrfs_super_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) { |
| 4140 | btrfs_err(fs_info, "bytes_used is too small %llu", |
| 4141 | btrfs_super_bytes_used(sb)); |
| 4142 | ret = -EINVAL; |
| 4143 | } |
Chandan Rajendra | b7f6705 | 2016-06-23 15:16:44 +0530 | [diff] [blame] | 4144 | if (!is_power_of_2(btrfs_super_stripesize(sb))) { |
Liu Bo | 99e3ecf | 2016-06-03 12:05:14 -0700 | [diff] [blame] | 4145 | btrfs_err(fs_info, "invalid stripesize %u", |
| 4146 | btrfs_super_stripesize(sb)); |
| 4147 | ret = -EINVAL; |
| 4148 | } |
David Sterba | 21e7626 | 2014-10-27 13:52:21 +0100 | [diff] [blame] | 4149 | if (btrfs_super_num_devices(sb) > (1UL << 31)) |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 4150 | printk(KERN_WARNING "BTRFS: suspicious number of devices: %llu\n", |
David Sterba | 21e7626 | 2014-10-27 13:52:21 +0100 | [diff] [blame] | 4151 | btrfs_super_num_devices(sb)); |
David Sterba | 75d6ad3 | 2014-10-31 17:18:08 +0100 | [diff] [blame] | 4152 | if (btrfs_super_num_devices(sb) == 0) { |
| 4153 | printk(KERN_ERR "BTRFS: number of devices is 0\n"); |
| 4154 | ret = -EINVAL; |
| 4155 | } |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 4156 | |
David Sterba | 21e7626 | 2014-10-27 13:52:21 +0100 | [diff] [blame] | 4157 | if (btrfs_super_bytenr(sb) != BTRFS_SUPER_INFO_OFFSET) { |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 4158 | printk(KERN_ERR "BTRFS: super offset mismatch %llu != %u\n", |
David Sterba | 21e7626 | 2014-10-27 13:52:21 +0100 | [diff] [blame] | 4159 | btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET); |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 4160 | ret = -EINVAL; |
| 4161 | } |
| 4162 | |
| 4163 | /* |
David Sterba | ce7fca5 | 2014-10-31 18:42:05 +0100 | [diff] [blame] | 4164 | * Obvious sys_chunk_array corruptions, it must hold at least one key |
| 4165 | * and one chunk |
| 4166 | */ |
| 4167 | if (btrfs_super_sys_array_size(sb) > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) { |
| 4168 | printk(KERN_ERR "BTRFS: system chunk array too big %u > %u\n", |
| 4169 | btrfs_super_sys_array_size(sb), |
| 4170 | BTRFS_SYSTEM_CHUNK_ARRAY_SIZE); |
| 4171 | ret = -EINVAL; |
| 4172 | } |
| 4173 | if (btrfs_super_sys_array_size(sb) < sizeof(struct btrfs_disk_key) |
| 4174 | + sizeof(struct btrfs_chunk)) { |
Fabian Frederick | d220712 | 2015-02-14 13:10:22 +0100 | [diff] [blame] | 4175 | printk(KERN_ERR "BTRFS: system chunk array too small %u < %zu\n", |
David Sterba | ce7fca5 | 2014-10-31 18:42:05 +0100 | [diff] [blame] | 4176 | btrfs_super_sys_array_size(sb), |
| 4177 | sizeof(struct btrfs_disk_key) |
| 4178 | + sizeof(struct btrfs_chunk)); |
| 4179 | ret = -EINVAL; |
| 4180 | } |
| 4181 | |
| 4182 | /* |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 4183 | * The generation is a global counter, we'll trust it more than the others |
| 4184 | * but it's still possible that it's the one that's wrong. |
| 4185 | */ |
David Sterba | 21e7626 | 2014-10-27 13:52:21 +0100 | [diff] [blame] | 4186 | if (btrfs_super_generation(sb) < btrfs_super_chunk_root_generation(sb)) |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 4187 | printk(KERN_WARNING |
| 4188 | "BTRFS: suspicious: generation < chunk_root_generation: %llu < %llu\n", |
David Sterba | 21e7626 | 2014-10-27 13:52:21 +0100 | [diff] [blame] | 4189 | btrfs_super_generation(sb), btrfs_super_chunk_root_generation(sb)); |
| 4190 | if (btrfs_super_generation(sb) < btrfs_super_cache_generation(sb) |
| 4191 | && btrfs_super_cache_generation(sb) != (u64)-1) |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 4192 | printk(KERN_WARNING |
| 4193 | "BTRFS: suspicious: generation < cache_generation: %llu < %llu\n", |
David Sterba | 21e7626 | 2014-10-27 13:52:21 +0100 | [diff] [blame] | 4194 | btrfs_super_generation(sb), btrfs_super_cache_generation(sb)); |
David Sterba | c926093 | 2014-09-30 19:16:47 +0200 | [diff] [blame] | 4195 | |
| 4196 | return ret; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4197 | } |
| 4198 | |
Eric Sandeen | 48a3b63 | 2013-04-25 20:41:01 +0000 | [diff] [blame] | 4199 | static void btrfs_error_commit_super(struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4200 | { |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4201 | mutex_lock(&root->fs_info->cleaner_mutex); |
| 4202 | btrfs_run_delayed_iputs(root); |
| 4203 | mutex_unlock(&root->fs_info->cleaner_mutex); |
| 4204 | |
| 4205 | down_write(&root->fs_info->cleanup_work_sem); |
| 4206 | up_write(&root->fs_info->cleanup_work_sem); |
| 4207 | |
| 4208 | /* cleanup FS via transaction */ |
| 4209 | btrfs_cleanup_transaction(root); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4210 | } |
| 4211 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 4212 | static void btrfs_destroy_ordered_extents(struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4213 | { |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4214 | struct btrfs_ordered_extent *ordered; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4215 | |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 4216 | spin_lock(&root->ordered_extent_lock); |
Josef Bacik | 779880e | 2013-01-31 14:30:08 -0500 | [diff] [blame] | 4217 | /* |
| 4218 | * This will just short circuit the ordered completion stuff which will |
| 4219 | * make sure the ordered extent gets properly cleaned up. |
| 4220 | */ |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 4221 | list_for_each_entry(ordered, &root->ordered_extents, |
Josef Bacik | 779880e | 2013-01-31 14:30:08 -0500 | [diff] [blame] | 4222 | root_extent_list) |
| 4223 | set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 4224 | spin_unlock(&root->ordered_extent_lock); |
| 4225 | } |
| 4226 | |
| 4227 | static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info) |
| 4228 | { |
| 4229 | struct btrfs_root *root; |
| 4230 | struct list_head splice; |
| 4231 | |
| 4232 | INIT_LIST_HEAD(&splice); |
| 4233 | |
| 4234 | spin_lock(&fs_info->ordered_root_lock); |
| 4235 | list_splice_init(&fs_info->ordered_roots, &splice); |
| 4236 | while (!list_empty(&splice)) { |
| 4237 | root = list_first_entry(&splice, struct btrfs_root, |
| 4238 | ordered_root); |
Josef Bacik | 1de2cfd | 2013-09-27 16:36:02 -0400 | [diff] [blame] | 4239 | list_move_tail(&root->ordered_root, |
| 4240 | &fs_info->ordered_roots); |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 4241 | |
Liu Bo | 2a85d9c | 2014-02-10 17:07:16 +0800 | [diff] [blame] | 4242 | spin_unlock(&fs_info->ordered_root_lock); |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 4243 | btrfs_destroy_ordered_extents(root); |
| 4244 | |
Liu Bo | 2a85d9c | 2014-02-10 17:07:16 +0800 | [diff] [blame] | 4245 | cond_resched(); |
| 4246 | spin_lock(&fs_info->ordered_root_lock); |
Miao Xie | 199c2a9 | 2013-05-15 07:48:23 +0000 | [diff] [blame] | 4247 | } |
| 4248 | spin_unlock(&fs_info->ordered_root_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4249 | } |
| 4250 | |
Stefan Behrens | 35a3621 | 2013-08-14 18:12:25 +0200 | [diff] [blame] | 4251 | static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
| 4252 | struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4253 | { |
| 4254 | struct rb_node *node; |
| 4255 | struct btrfs_delayed_ref_root *delayed_refs; |
| 4256 | struct btrfs_delayed_ref_node *ref; |
| 4257 | int ret = 0; |
| 4258 | |
| 4259 | delayed_refs = &trans->delayed_refs; |
| 4260 | |
| 4261 | spin_lock(&delayed_refs->lock); |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 4262 | if (atomic_read(&delayed_refs->num_entries) == 0) { |
David Sterba | cfece4d | 2011-04-25 19:43:52 -0400 | [diff] [blame] | 4263 | spin_unlock(&delayed_refs->lock); |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 4264 | btrfs_info(root->fs_info, "delayed_refs has NO entry"); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4265 | return ret; |
| 4266 | } |
| 4267 | |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 4268 | while ((node = rb_first(&delayed_refs->href_root)) != NULL) { |
| 4269 | struct btrfs_delayed_ref_head *head; |
Qu Wenruo | c6fc245 | 2015-03-30 17:03:00 +0800 | [diff] [blame] | 4270 | struct btrfs_delayed_ref_node *tmp; |
Josef Bacik | e78417d | 2013-06-03 16:42:36 -0400 | [diff] [blame] | 4271 | bool pin_bytes = false; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4272 | |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 4273 | head = rb_entry(node, struct btrfs_delayed_ref_head, |
| 4274 | href_node); |
| 4275 | if (!mutex_trylock(&head->mutex)) { |
| 4276 | atomic_inc(&head->node.refs); |
| 4277 | spin_unlock(&delayed_refs->lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4278 | |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 4279 | mutex_lock(&head->mutex); |
Josef Bacik | e78417d | 2013-06-03 16:42:36 -0400 | [diff] [blame] | 4280 | mutex_unlock(&head->mutex); |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 4281 | btrfs_put_delayed_ref(&head->node); |
| 4282 | spin_lock(&delayed_refs->lock); |
| 4283 | continue; |
Josef Bacik | e78417d | 2013-06-03 16:42:36 -0400 | [diff] [blame] | 4284 | } |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 4285 | spin_lock(&head->lock); |
Qu Wenruo | c6fc245 | 2015-03-30 17:03:00 +0800 | [diff] [blame] | 4286 | list_for_each_entry_safe_reverse(ref, tmp, &head->ref_list, |
| 4287 | list) { |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 4288 | ref->in_tree = 0; |
Qu Wenruo | c6fc245 | 2015-03-30 17:03:00 +0800 | [diff] [blame] | 4289 | list_del(&ref->list); |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 4290 | atomic_dec(&delayed_refs->num_entries); |
| 4291 | btrfs_put_delayed_ref(ref); |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 4292 | } |
| 4293 | if (head->must_insert_reserved) |
| 4294 | pin_bytes = true; |
| 4295 | btrfs_free_delayed_extent_op(head->extent_op); |
| 4296 | delayed_refs->num_heads--; |
| 4297 | if (head->processing == 0) |
| 4298 | delayed_refs->num_heads_ready--; |
| 4299 | atomic_dec(&delayed_refs->num_entries); |
| 4300 | head->node.in_tree = 0; |
| 4301 | rb_erase(&head->href_node, &delayed_refs->href_root); |
| 4302 | spin_unlock(&head->lock); |
| 4303 | spin_unlock(&delayed_refs->lock); |
| 4304 | mutex_unlock(&head->mutex); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4305 | |
Josef Bacik | d7df2c7 | 2014-01-23 09:21:38 -0500 | [diff] [blame] | 4306 | if (pin_bytes) |
| 4307 | btrfs_pin_extent(root, head->node.bytenr, |
| 4308 | head->node.num_bytes, 1); |
| 4309 | btrfs_put_delayed_ref(&head->node); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4310 | cond_resched(); |
| 4311 | spin_lock(&delayed_refs->lock); |
| 4312 | } |
| 4313 | |
| 4314 | spin_unlock(&delayed_refs->lock); |
| 4315 | |
| 4316 | return ret; |
| 4317 | } |
| 4318 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 4319 | static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4320 | { |
| 4321 | struct btrfs_inode *btrfs_inode; |
| 4322 | struct list_head splice; |
| 4323 | |
| 4324 | INIT_LIST_HEAD(&splice); |
| 4325 | |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 4326 | spin_lock(&root->delalloc_lock); |
| 4327 | list_splice_init(&root->delalloc_inodes, &splice); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4328 | |
| 4329 | while (!list_empty(&splice)) { |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 4330 | btrfs_inode = list_first_entry(&splice, struct btrfs_inode, |
| 4331 | delalloc_inodes); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4332 | |
| 4333 | list_del_init(&btrfs_inode->delalloc_inodes); |
Miao Xie | df0af1a | 2013-01-29 10:11:59 +0000 | [diff] [blame] | 4334 | clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, |
| 4335 | &btrfs_inode->runtime_flags); |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 4336 | spin_unlock(&root->delalloc_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4337 | |
| 4338 | btrfs_invalidate_inodes(btrfs_inode->root); |
Miao Xie | b216cbf | 2013-05-15 07:48:21 +0000 | [diff] [blame] | 4339 | |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 4340 | spin_lock(&root->delalloc_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4341 | } |
| 4342 | |
Miao Xie | eb73c1b | 2013-05-15 07:48:22 +0000 | [diff] [blame] | 4343 | spin_unlock(&root->delalloc_lock); |
| 4344 | } |
| 4345 | |
| 4346 | static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info) |
| 4347 | { |
| 4348 | struct btrfs_root *root; |
| 4349 | struct list_head splice; |
| 4350 | |
| 4351 | INIT_LIST_HEAD(&splice); |
| 4352 | |
| 4353 | spin_lock(&fs_info->delalloc_root_lock); |
| 4354 | list_splice_init(&fs_info->delalloc_roots, &splice); |
| 4355 | while (!list_empty(&splice)) { |
| 4356 | root = list_first_entry(&splice, struct btrfs_root, |
| 4357 | delalloc_root); |
| 4358 | list_del_init(&root->delalloc_root); |
| 4359 | root = btrfs_grab_fs_root(root); |
| 4360 | BUG_ON(!root); |
| 4361 | spin_unlock(&fs_info->delalloc_root_lock); |
| 4362 | |
| 4363 | btrfs_destroy_delalloc_inodes(root); |
| 4364 | btrfs_put_fs_root(root); |
| 4365 | |
| 4366 | spin_lock(&fs_info->delalloc_root_lock); |
| 4367 | } |
| 4368 | spin_unlock(&fs_info->delalloc_root_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4369 | } |
| 4370 | |
| 4371 | static int btrfs_destroy_marked_extents(struct btrfs_root *root, |
| 4372 | struct extent_io_tree *dirty_pages, |
| 4373 | int mark) |
| 4374 | { |
| 4375 | int ret; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4376 | struct extent_buffer *eb; |
| 4377 | u64 start = 0; |
| 4378 | u64 end; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4379 | |
| 4380 | while (1) { |
| 4381 | ret = find_first_extent_bit(dirty_pages, start, &start, &end, |
Josef Bacik | e613887 | 2012-09-27 17:07:30 -0400 | [diff] [blame] | 4382 | mark, NULL); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4383 | if (ret) |
| 4384 | break; |
| 4385 | |
David Sterba | 9116621 | 2016-04-26 23:54:39 +0200 | [diff] [blame] | 4386 | clear_extent_bits(dirty_pages, start, end, mark); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4387 | while (start <= end) { |
Daniel Dressler | 01d5847 | 2014-11-21 17:15:07 +0900 | [diff] [blame] | 4388 | eb = btrfs_find_tree_block(root->fs_info, start); |
David Sterba | 707e8a0 | 2014-06-04 19:22:26 +0200 | [diff] [blame] | 4389 | start += root->nodesize; |
Josef Bacik | fd8b2b6 | 2013-04-24 16:41:19 -0400 | [diff] [blame] | 4390 | if (!eb) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4391 | continue; |
Josef Bacik | fd8b2b6 | 2013-04-24 16:41:19 -0400 | [diff] [blame] | 4392 | wait_on_extent_buffer_writeback(eb); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4393 | |
Josef Bacik | fd8b2b6 | 2013-04-24 16:41:19 -0400 | [diff] [blame] | 4394 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, |
| 4395 | &eb->bflags)) |
| 4396 | clear_extent_buffer_dirty(eb); |
| 4397 | free_extent_buffer_stale(eb); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4398 | } |
| 4399 | } |
| 4400 | |
| 4401 | return ret; |
| 4402 | } |
| 4403 | |
| 4404 | static int btrfs_destroy_pinned_extent(struct btrfs_root *root, |
| 4405 | struct extent_io_tree *pinned_extents) |
| 4406 | { |
| 4407 | struct extent_io_tree *unpin; |
| 4408 | u64 start; |
| 4409 | u64 end; |
| 4410 | int ret; |
Liu Bo | ed0eaa1 | 2012-06-14 02:23:21 -0600 | [diff] [blame] | 4411 | bool loop = true; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4412 | |
| 4413 | unpin = pinned_extents; |
Liu Bo | ed0eaa1 | 2012-06-14 02:23:21 -0600 | [diff] [blame] | 4414 | again: |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4415 | while (1) { |
| 4416 | ret = find_first_extent_bit(unpin, 0, &start, &end, |
Josef Bacik | e613887 | 2012-09-27 17:07:30 -0400 | [diff] [blame] | 4417 | EXTENT_DIRTY, NULL); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4418 | if (ret) |
| 4419 | break; |
| 4420 | |
David Sterba | af6f8f6 | 2016-04-26 23:54:39 +0200 | [diff] [blame] | 4421 | clear_extent_dirty(unpin, start, end); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4422 | btrfs_error_unpin_extent_range(root, start, end); |
| 4423 | cond_resched(); |
| 4424 | } |
| 4425 | |
Liu Bo | ed0eaa1 | 2012-06-14 02:23:21 -0600 | [diff] [blame] | 4426 | if (loop) { |
| 4427 | if (unpin == &root->fs_info->freed_extents[0]) |
| 4428 | unpin = &root->fs_info->freed_extents[1]; |
| 4429 | else |
| 4430 | unpin = &root->fs_info->freed_extents[0]; |
| 4431 | loop = false; |
| 4432 | goto again; |
| 4433 | } |
| 4434 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4435 | return 0; |
| 4436 | } |
| 4437 | |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 4438 | void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, |
| 4439 | struct btrfs_root *root) |
| 4440 | { |
| 4441 | btrfs_destroy_delayed_refs(cur_trans, root); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 4442 | |
Miao Xie | 4a9d8bd | 2013-05-17 03:53:43 +0000 | [diff] [blame] | 4443 | cur_trans->state = TRANS_STATE_COMMIT_START; |
Josef Bacik | d7096fc | 2012-05-31 15:49:57 -0400 | [diff] [blame] | 4444 | wake_up(&root->fs_info->transaction_blocked_wait); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 4445 | |
Miao Xie | 4a9d8bd | 2013-05-17 03:53:43 +0000 | [diff] [blame] | 4446 | cur_trans->state = TRANS_STATE_UNBLOCKED; |
Josef Bacik | d7096fc | 2012-05-31 15:49:57 -0400 | [diff] [blame] | 4447 | wake_up(&root->fs_info->transaction_wait); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 4448 | |
Miao Xie | 67cde34 | 2012-06-14 02:23:22 -0600 | [diff] [blame] | 4449 | btrfs_destroy_delayed_inodes(root); |
| 4450 | btrfs_assert_delayed_root_empty(root); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 4451 | |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 4452 | btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, |
| 4453 | EXTENT_DIRTY); |
Liu Bo | 6e841e3 | 2012-06-14 02:23:20 -0600 | [diff] [blame] | 4454 | btrfs_destroy_pinned_extent(root, |
| 4455 | root->fs_info->pinned_extents); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 4456 | |
Miao Xie | 4a9d8bd | 2013-05-17 03:53:43 +0000 | [diff] [blame] | 4457 | cur_trans->state =TRANS_STATE_COMPLETED; |
| 4458 | wake_up(&cur_trans->commit_wait); |
| 4459 | |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 4460 | /* |
| 4461 | memset(cur_trans, 0, sizeof(*cur_trans)); |
| 4462 | kmem_cache_free(btrfs_transaction_cachep, cur_trans); |
| 4463 | */ |
| 4464 | } |
| 4465 | |
Eric Sandeen | 48a3b63 | 2013-04-25 20:41:01 +0000 | [diff] [blame] | 4466 | static int btrfs_cleanup_transaction(struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4467 | { |
| 4468 | struct btrfs_transaction *t; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4469 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4470 | mutex_lock(&root->fs_info->transaction_kthread_mutex); |
| 4471 | |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 4472 | spin_lock(&root->fs_info->trans_lock); |
Josef Bacik | 724e231 | 2013-09-30 11:36:38 -0400 | [diff] [blame] | 4473 | while (!list_empty(&root->fs_info->trans_list)) { |
| 4474 | t = list_first_entry(&root->fs_info->trans_list, |
| 4475 | struct btrfs_transaction, list); |
| 4476 | if (t->state >= TRANS_STATE_COMMIT_START) { |
| 4477 | atomic_inc(&t->use_count); |
| 4478 | spin_unlock(&root->fs_info->trans_lock); |
| 4479 | btrfs_wait_for_commit(root, t->transid); |
| 4480 | btrfs_put_transaction(t); |
| 4481 | spin_lock(&root->fs_info->trans_lock); |
| 4482 | continue; |
| 4483 | } |
| 4484 | if (t == root->fs_info->running_transaction) { |
| 4485 | t->state = TRANS_STATE_COMMIT_DOING; |
| 4486 | spin_unlock(&root->fs_info->trans_lock); |
| 4487 | /* |
| 4488 | * We wait for 0 num_writers since we don't hold a trans |
| 4489 | * handle open currently for this transaction. |
| 4490 | */ |
| 4491 | wait_event(t->writer_wait, |
| 4492 | atomic_read(&t->num_writers) == 0); |
| 4493 | } else { |
| 4494 | spin_unlock(&root->fs_info->trans_lock); |
| 4495 | } |
| 4496 | btrfs_cleanup_one_transaction(t, root); |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 4497 | |
Josef Bacik | 724e231 | 2013-09-30 11:36:38 -0400 | [diff] [blame] | 4498 | spin_lock(&root->fs_info->trans_lock); |
| 4499 | if (t == root->fs_info->running_transaction) |
| 4500 | root->fs_info->running_transaction = NULL; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4501 | list_del_init(&t->list); |
Josef Bacik | 724e231 | 2013-09-30 11:36:38 -0400 | [diff] [blame] | 4502 | spin_unlock(&root->fs_info->trans_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4503 | |
Josef Bacik | 724e231 | 2013-09-30 11:36:38 -0400 | [diff] [blame] | 4504 | btrfs_put_transaction(t); |
| 4505 | trace_btrfs_transaction_commit(root); |
| 4506 | spin_lock(&root->fs_info->trans_lock); |
| 4507 | } |
| 4508 | spin_unlock(&root->fs_info->trans_lock); |
| 4509 | btrfs_destroy_all_ordered_extents(root->fs_info); |
| 4510 | btrfs_destroy_delayed_inodes(root); |
| 4511 | btrfs_assert_delayed_root_empty(root); |
| 4512 | btrfs_destroy_pinned_extent(root, root->fs_info->pinned_extents); |
| 4513 | btrfs_destroy_all_delalloc_inodes(root->fs_info); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4514 | mutex_unlock(&root->fs_info->transaction_kthread_mutex); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 4515 | |
| 4516 | return 0; |
| 4517 | } |
| 4518 | |
David Sterba | e8c9f18 | 2015-01-02 18:23:10 +0100 | [diff] [blame] | 4519 | static const struct extent_io_ops btree_extent_io_ops = { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 4520 | .readpage_end_io_hook = btree_readpage_end_io_hook, |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 4521 | .readpage_io_failed_hook = btree_io_failed_hook, |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 4522 | .submit_bio_hook = btree_submit_bio_hook, |
Chris Mason | 239b14b | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 4523 | /* note we're sharing with inode.c for the merge bio hook */ |
| 4524 | .merge_bio_hook = btrfs_merge_bio_hook, |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 4525 | }; |