Chris Mason | 6cbd557 | 2007-06-12 09:07:21 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 Oracle. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public |
| 6 | * License v2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public |
| 14 | * License along with this program; if not, write to the |
| 15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 16 | * Boston, MA 021110-1307, USA. |
| 17 | */ |
| 18 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 19 | #include <linux/fs.h> |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 20 | #include <linux/blkdev.h> |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 21 | #include <linux/scatterlist.h> |
Chris Mason | 22b0ebd | 2007-03-30 08:47:31 -0400 | [diff] [blame] | 22 | #include <linux/swap.h> |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 23 | #include <linux/radix-tree.h> |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 24 | #include <linux/writeback.h> |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 25 | #include <linux/buffer_head.h> |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 26 | #include <linux/workqueue.h> |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 27 | #include <linux/kthread.h> |
Chris Mason | 4b4e25f | 2008-11-20 10:22:27 -0500 | [diff] [blame] | 28 | #include <linux/freezer.h> |
David Woodhouse | 163e783 | 2009-04-19 13:02:41 +0100 | [diff] [blame] | 29 | #include <linux/crc32c.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 30 | #include <linux/slab.h> |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 31 | #include <linux/migrate.h> |
David Sterba | 7a36dde | 2011-05-06 15:33:15 +0200 | [diff] [blame] | 32 | #include <linux/ratelimit.h> |
David Sterba | 7e75bf3 | 2011-03-18 22:56:43 +0000 | [diff] [blame] | 33 | #include <asm/unaligned.h> |
Chris Mason | 4b4e25f | 2008-11-20 10:22:27 -0500 | [diff] [blame] | 34 | #include "compat.h" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 35 | #include "ctree.h" |
| 36 | #include "disk-io.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 | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 41 | #include "async-thread.h" |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 42 | #include "locking.h" |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 43 | #include "tree-log.h" |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 44 | #include "free-space-cache.h" |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 45 | #include "inode-map.h" |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 46 | #include "check-integrity.h" |
Josef Bacik | 606686e | 2012-06-04 14:03:51 -0400 | [diff] [blame] | 47 | #include "rcu-string.h" |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 48 | #include "dev-replace.h" |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 49 | #include "raid56.h" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 50 | |
Josef Bacik | de0022b | 2012-09-25 14:25:58 -0400 | [diff] [blame] | 51 | #ifdef CONFIG_X86 |
| 52 | #include <asm/cpufeature.h> |
| 53 | #endif |
| 54 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 55 | static struct extent_io_ops btree_extent_io_ops; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 56 | static void end_workqueue_fn(struct btrfs_work *work); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 57 | static void free_fs_root(struct btrfs_root *root); |
David Sterba | fcd1f065 | 2012-03-06 00:06:18 +0100 | [diff] [blame] | 58 | static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 59 | int read_only); |
Josef Bacik | 569e0f3 | 2013-02-13 11:09:14 -0500 | [diff] [blame] | 60 | static void btrfs_destroy_ordered_operations(struct btrfs_transaction *t, |
| 61 | struct btrfs_root *root); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 62 | static void btrfs_destroy_ordered_extents(struct btrfs_root *root); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 63 | static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
| 64 | struct btrfs_root *root); |
Miao Xie | aec8030 | 2013-03-04 09:44:29 +0000 | [diff] [blame] | 65 | static void btrfs_evict_pending_snapshots(struct btrfs_transaction *t); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 66 | static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 67 | static int btrfs_destroy_marked_extents(struct btrfs_root *root, |
| 68 | struct extent_io_tree *dirty_pages, |
| 69 | int mark); |
| 70 | static int btrfs_destroy_pinned_extent(struct btrfs_root *root, |
| 71 | struct extent_io_tree *pinned_extents); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 72 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 73 | /* |
| 74 | * end_io_wq structs are used to do processing in task context when an IO is |
| 75 | * complete. This is used during reads to verify checksums, and it is used |
| 76 | * by writes to insert metadata for new file extents after IO is complete. |
| 77 | */ |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 78 | struct end_io_wq { |
| 79 | struct bio *bio; |
| 80 | bio_end_io_t *end_io; |
| 81 | void *private; |
| 82 | struct btrfs_fs_info *info; |
| 83 | int error; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 84 | int metadata; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 85 | struct list_head list; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 86 | struct btrfs_work work; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 87 | }; |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 88 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 89 | /* |
| 90 | * async submit bios are used to offload expensive checksumming |
| 91 | * onto the worker threads. They checksum file and metadata bios |
| 92 | * just before they are sent down the IO stack. |
| 93 | */ |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 94 | struct async_submit_bio { |
| 95 | struct inode *inode; |
| 96 | struct bio *bio; |
| 97 | struct list_head list; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 98 | extent_submit_bio_hook_t *submit_bio_start; |
| 99 | extent_submit_bio_hook_t *submit_bio_done; |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 100 | int rw; |
| 101 | int mirror_num; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 102 | unsigned long bio_flags; |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 103 | /* |
| 104 | * bio_offset is optional, can be used if the pages in the bio |
| 105 | * can't tell us where in the file the bio should go |
| 106 | */ |
| 107 | u64 bio_offset; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 108 | struct btrfs_work work; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 109 | int error; |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 110 | }; |
| 111 | |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 112 | /* |
| 113 | * Lockdep class keys for extent_buffer->lock's in this root. For a given |
| 114 | * eb, the lockdep key is determined by the btrfs_root it belongs to and |
| 115 | * the level the eb occupies in the tree. |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 116 | * |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 117 | * Different roots are used for different purposes and may nest inside each |
| 118 | * other and they require separate keysets. As lockdep keys should be |
| 119 | * static, assign keysets according to the purpose of the root as indicated |
| 120 | * by btrfs_root->objectid. This ensures that all special purpose roots |
| 121 | * have separate keysets. |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 122 | * |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 123 | * Lock-nesting across peer nodes is always done with the immediate parent |
| 124 | * node locked thus preventing deadlock. As lockdep doesn't know this, use |
| 125 | * subclass to avoid triggering lockdep warning in such cases. |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 126 | * |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 127 | * The key is set by the readpage_end_io_hook after the buffer has passed |
| 128 | * csum validation but before the pages are unlocked. It is also set by |
| 129 | * btrfs_init_new_buffer on freshly allocated blocks. |
| 130 | * |
| 131 | * We also add a check to make sure the highest level of the tree is the |
| 132 | * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code |
| 133 | * needs update as well. |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 134 | */ |
| 135 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 136 | # if BTRFS_MAX_LEVEL != 8 |
| 137 | # error |
| 138 | # endif |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 139 | |
| 140 | static struct btrfs_lockdep_keyset { |
| 141 | u64 id; /* root objectid */ |
| 142 | const char *name_stem; /* lock name stem */ |
| 143 | char names[BTRFS_MAX_LEVEL + 1][20]; |
| 144 | struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; |
| 145 | } btrfs_lockdep_keysets[] = { |
| 146 | { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, |
| 147 | { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, |
| 148 | { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, |
| 149 | { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, |
| 150 | { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, |
| 151 | { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, |
| 152 | { .id = BTRFS_ORPHAN_OBJECTID, .name_stem = "orphan" }, |
| 153 | { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, |
| 154 | { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, |
| 155 | { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, |
| 156 | { .id = 0, .name_stem = "tree" }, |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 157 | }; |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 158 | |
| 159 | void __init btrfs_init_lockdep(void) |
| 160 | { |
| 161 | int i, j; |
| 162 | |
| 163 | /* initialize lockdep class names */ |
| 164 | for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { |
| 165 | struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; |
| 166 | |
| 167 | for (j = 0; j < ARRAY_SIZE(ks->names); j++) |
| 168 | snprintf(ks->names[j], sizeof(ks->names[j]), |
| 169 | "btrfs-%s-%02d", ks->name_stem, j); |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, |
| 174 | int level) |
| 175 | { |
| 176 | struct btrfs_lockdep_keyset *ks; |
| 177 | |
| 178 | BUG_ON(level >= ARRAY_SIZE(ks->keys)); |
| 179 | |
| 180 | /* find the matching keyset, id 0 is the default entry */ |
| 181 | for (ks = btrfs_lockdep_keysets; ks->id; ks++) |
| 182 | if (ks->id == objectid) |
| 183 | break; |
| 184 | |
| 185 | lockdep_set_class_and_name(&eb->lock, |
| 186 | &ks->keys[level], ks->names[level]); |
| 187 | } |
| 188 | |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 189 | #endif |
| 190 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 191 | /* |
| 192 | * extents on the btree inode are pretty simple, there's one extent |
| 193 | * that covers the entire device |
| 194 | */ |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 195 | static struct extent_map *btree_get_extent(struct inode *inode, |
David Sterba | 306e16c | 2011-04-19 14:29:38 +0200 | [diff] [blame] | 196 | struct page *page, size_t pg_offset, u64 start, u64 len, |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 197 | int create) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 198 | { |
| 199 | struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; |
| 200 | struct extent_map *em; |
| 201 | int ret; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 202 | |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 203 | read_lock(&em_tree->lock); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 204 | em = lookup_extent_mapping(em_tree, start, len); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 205 | if (em) { |
| 206 | em->bdev = |
| 207 | BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 208 | read_unlock(&em_tree->lock); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 209 | goto out; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 210 | } |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 211 | read_unlock(&em_tree->lock); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 212 | |
David Sterba | 172ddd6 | 2011-04-21 00:48:27 +0200 | [diff] [blame] | 213 | em = alloc_extent_map(); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 214 | if (!em) { |
| 215 | em = ERR_PTR(-ENOMEM); |
| 216 | goto out; |
| 217 | } |
| 218 | em->start = 0; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 219 | em->len = (u64)-1; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 220 | em->block_len = (u64)-1; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 221 | em->block_start = 0; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 222 | em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 223 | |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 224 | write_lock(&em_tree->lock); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 225 | ret = add_extent_mapping(em_tree, em); |
| 226 | if (ret == -EEXIST) { |
| 227 | free_extent_map(em); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 228 | em = lookup_extent_mapping(em_tree, start, len); |
Tsutomu Itoh | b4f359a | 2012-09-13 03:32:54 -0600 | [diff] [blame] | 229 | if (!em) |
Tsutomu Itoh | 0433f20 | 2012-09-13 03:32:32 -0600 | [diff] [blame] | 230 | em = ERR_PTR(-EIO); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 231 | } else if (ret) { |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 232 | free_extent_map(em); |
Tsutomu Itoh | 0433f20 | 2012-09-13 03:32:32 -0600 | [diff] [blame] | 233 | em = ERR_PTR(ret); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 234 | } |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 235 | write_unlock(&em_tree->lock); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 236 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 237 | out: |
| 238 | return em; |
| 239 | } |
| 240 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 241 | u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len) |
| 242 | { |
David Woodhouse | 163e783 | 2009-04-19 13:02:41 +0100 | [diff] [blame] | 243 | return crc32c(seed, data, len); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 244 | } |
| 245 | |
| 246 | void btrfs_csum_final(u32 crc, char *result) |
| 247 | { |
David Sterba | 7e75bf3 | 2011-03-18 22:56:43 +0000 | [diff] [blame] | 248 | put_unaligned_le32(~crc, result); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 249 | } |
| 250 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 251 | /* |
| 252 | * compute the csum for a btree block, and either verify it or write it |
| 253 | * into the csum field of the block. |
| 254 | */ |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 255 | static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, |
| 256 | int verify) |
| 257 | { |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 258 | u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy); |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 259 | char *result = NULL; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 260 | unsigned long len; |
| 261 | unsigned long cur_len; |
| 262 | unsigned long offset = BTRFS_CSUM_SIZE; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 263 | char *kaddr; |
| 264 | unsigned long map_start; |
| 265 | unsigned long map_len; |
| 266 | int err; |
| 267 | u32 crc = ~(u32)0; |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 268 | unsigned long inline_result; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 269 | |
| 270 | len = buf->len - offset; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 271 | while (len > 0) { |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 272 | err = map_private_extent_buffer(buf, offset, 32, |
Chris Mason | a659171 | 2011-07-19 12:04:14 -0400 | [diff] [blame] | 273 | &kaddr, &map_start, &map_len); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 274 | if (err) |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 275 | return 1; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 276 | cur_len = min(len, map_len - (offset - map_start)); |
| 277 | crc = btrfs_csum_data(root, kaddr + offset - map_start, |
| 278 | crc, cur_len); |
| 279 | len -= cur_len; |
| 280 | offset += cur_len; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 281 | } |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 282 | if (csum_size > sizeof(inline_result)) { |
| 283 | result = kzalloc(csum_size * sizeof(char), GFP_NOFS); |
| 284 | if (!result) |
| 285 | return 1; |
| 286 | } else { |
| 287 | result = (char *)&inline_result; |
| 288 | } |
| 289 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 290 | btrfs_csum_final(crc, result); |
| 291 | |
| 292 | if (verify) { |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 293 | if (memcmp_extent_buffer(buf, result, 0, csum_size)) { |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 294 | u32 val; |
| 295 | u32 found = 0; |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 296 | memcpy(&found, result, csum_size); |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 297 | |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 298 | read_extent_buffer(buf, &val, 0, csum_size); |
David Sterba | 7a36dde | 2011-05-06 15:33:15 +0200 | [diff] [blame] | 299 | printk_ratelimited(KERN_INFO "btrfs: %s checksum verify " |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 300 | "failed on %llu wanted %X found %X " |
| 301 | "level %d\n", |
| 302 | root->fs_info->sb->s_id, |
| 303 | (unsigned long long)buf->start, val, found, |
| 304 | btrfs_header_level(buf)); |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 305 | if (result != (char *)&inline_result) |
| 306 | kfree(result); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 307 | return 1; |
| 308 | } |
| 309 | } else { |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 310 | write_extent_buffer(buf, result, 0, csum_size); |
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 (result != (char *)&inline_result) |
| 313 | kfree(result); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 314 | return 0; |
| 315 | } |
| 316 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 317 | /* |
| 318 | * we can't consider a given block up to date unless the transid of the |
| 319 | * block matches the transid in the parent node's pointer. This is how we |
| 320 | * detect blocks that either didn't get written at all or got written |
| 321 | * in the wrong place. |
| 322 | */ |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 323 | static int verify_parent_transid(struct extent_io_tree *io_tree, |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 324 | struct extent_buffer *eb, u64 parent_transid, |
| 325 | int atomic) |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 326 | { |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 327 | struct extent_state *cached_state = NULL; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 328 | int ret; |
| 329 | |
| 330 | if (!parent_transid || btrfs_header_generation(eb) == parent_transid) |
| 331 | return 0; |
| 332 | |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 333 | if (atomic) |
| 334 | return -EAGAIN; |
| 335 | |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 336 | lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, |
Jeff Mahoney | d008237 | 2012-03-01 14:57:19 +0100 | [diff] [blame] | 337 | 0, &cached_state); |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 338 | if (extent_buffer_uptodate(eb) && |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 339 | btrfs_header_generation(eb) == parent_transid) { |
| 340 | ret = 0; |
| 341 | goto out; |
| 342 | } |
David Sterba | 7a36dde | 2011-05-06 15:33:15 +0200 | [diff] [blame] | 343 | printk_ratelimited("parent transid verify failed on %llu wanted %llu " |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 344 | "found %llu\n", |
| 345 | (unsigned long long)eb->start, |
| 346 | (unsigned long long)parent_transid, |
| 347 | (unsigned long long)btrfs_header_generation(eb)); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 348 | ret = 1; |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 349 | clear_extent_buffer_uptodate(eb); |
Chris Mason | 33958dc | 2008-07-30 10:29:12 -0400 | [diff] [blame] | 350 | out: |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 351 | unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, |
| 352 | &cached_state, GFP_NOFS); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 353 | return ret; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 354 | } |
| 355 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 356 | /* |
| 357 | * helper to read a given tree block, doing retries as required when |
| 358 | * the checksums don't match and we have alternate mirrors to try. |
| 359 | */ |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 360 | static int btree_read_extent_buffer_pages(struct btrfs_root *root, |
| 361 | struct extent_buffer *eb, |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 362 | u64 start, u64 parent_transid) |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 363 | { |
| 364 | struct extent_io_tree *io_tree; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 365 | int failed = 0; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 366 | int ret; |
| 367 | int num_copies = 0; |
| 368 | int mirror_num = 0; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 369 | int failed_mirror = 0; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 370 | |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 371 | clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 372 | io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; |
| 373 | while (1) { |
Arne Jansen | bb82ab8 | 2011-06-10 14:06:53 +0200 | [diff] [blame] | 374 | ret = read_extent_buffer_pages(io_tree, eb, start, |
| 375 | WAIT_COMPLETE, |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 376 | btree_get_extent, mirror_num); |
Stefan Behrens | 256dd1b | 2012-08-10 08:58:21 -0600 | [diff] [blame] | 377 | if (!ret) { |
| 378 | if (!verify_parent_transid(io_tree, eb, |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 379 | parent_transid, 0)) |
Stefan Behrens | 256dd1b | 2012-08-10 08:58:21 -0600 | [diff] [blame] | 380 | break; |
| 381 | else |
| 382 | ret = -EIO; |
| 383 | } |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 384 | |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 385 | /* |
| 386 | * This buffer's crc is fine, but its contents are corrupted, so |
| 387 | * there is no reason to read the other copies, they won't be |
| 388 | * any less wrong. |
| 389 | */ |
| 390 | if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 391 | break; |
| 392 | |
Stefan Behrens | 5d96405 | 2012-11-05 14:59:07 +0100 | [diff] [blame] | 393 | num_copies = btrfs_num_copies(root->fs_info, |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 394 | eb->start, eb->len); |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 395 | if (num_copies == 1) |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 396 | break; |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 397 | |
Josef Bacik | 5cf1ab5 | 2012-04-16 09:42:26 -0400 | [diff] [blame] | 398 | if (!failed_mirror) { |
| 399 | failed = 1; |
| 400 | failed_mirror = eb->read_mirror; |
| 401 | } |
| 402 | |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 403 | mirror_num++; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 404 | if (mirror_num == failed_mirror) |
| 405 | mirror_num++; |
| 406 | |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 407 | if (mirror_num > num_copies) |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 408 | break; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 409 | } |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 410 | |
Stefan Behrens | c090158 | 2012-07-10 07:30:17 -0600 | [diff] [blame] | 411 | if (failed && !ret && failed_mirror) |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 412 | repair_eb_io_failure(root, eb, failed_mirror); |
| 413 | |
| 414 | return ret; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 415 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 416 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 417 | /* |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 418 | * checksum a dirty tree block before IO. This has extra checks to make sure |
| 419 | * 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] | 420 | */ |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 421 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 422 | static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 423 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 424 | struct extent_io_tree *tree; |
Miao Xie | 4eee4fa | 2012-12-21 09:17:45 +0000 | [diff] [blame] | 425 | u64 start = page_offset(page); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 426 | u64 found_start; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 427 | struct extent_buffer *eb; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 428 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 429 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 430 | |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 431 | eb = (struct extent_buffer *)page->private; |
| 432 | if (page != eb->pages[0]) |
| 433 | return 0; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 434 | found_start = btrfs_header_bytenr(eb); |
| 435 | if (found_start != start) { |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 436 | WARN_ON(1); |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 437 | return 0; |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 438 | } |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 439 | if (!PageUptodate(page)) { |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 440 | WARN_ON(1); |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 441 | return 0; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 442 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 443 | csum_tree_block(root, eb, 0); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 444 | return 0; |
| 445 | } |
| 446 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 447 | static int check_tree_block_fsid(struct btrfs_root *root, |
| 448 | struct extent_buffer *eb) |
| 449 | { |
| 450 | struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; |
| 451 | u8 fsid[BTRFS_UUID_SIZE]; |
| 452 | int ret = 1; |
| 453 | |
| 454 | read_extent_buffer(eb, fsid, (unsigned long)btrfs_header_fsid(eb), |
| 455 | BTRFS_FSID_SIZE); |
| 456 | while (fs_devices) { |
| 457 | if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { |
| 458 | ret = 0; |
| 459 | break; |
| 460 | } |
| 461 | fs_devices = fs_devices->seed; |
| 462 | } |
| 463 | return ret; |
| 464 | } |
| 465 | |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 466 | #define CORRUPT(reason, eb, root, slot) \ |
| 467 | printk(KERN_CRIT "btrfs: corrupt leaf, %s: block=%llu," \ |
| 468 | "root=%llu, slot=%d\n", reason, \ |
| 469 | (unsigned long long)btrfs_header_bytenr(eb), \ |
| 470 | (unsigned long long)root->objectid, slot) |
| 471 | |
| 472 | static noinline int check_leaf(struct btrfs_root *root, |
| 473 | struct extent_buffer *leaf) |
| 474 | { |
| 475 | struct btrfs_key key; |
| 476 | struct btrfs_key leaf_key; |
| 477 | u32 nritems = btrfs_header_nritems(leaf); |
| 478 | int slot; |
| 479 | |
| 480 | if (nritems == 0) |
| 481 | return 0; |
| 482 | |
| 483 | /* Check the 0 item */ |
| 484 | if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != |
| 485 | BTRFS_LEAF_DATA_SIZE(root)) { |
| 486 | CORRUPT("invalid item offset size pair", leaf, root, 0); |
| 487 | return -EIO; |
| 488 | } |
| 489 | |
| 490 | /* |
| 491 | * Check to make sure each items keys are in the correct order and their |
| 492 | * offsets make sense. We only have to loop through nritems-1 because |
| 493 | * we check the current slot against the next slot, which verifies the |
| 494 | * next slot's offset+size makes sense and that the current's slot |
| 495 | * offset is correct. |
| 496 | */ |
| 497 | for (slot = 0; slot < nritems - 1; slot++) { |
| 498 | btrfs_item_key_to_cpu(leaf, &leaf_key, slot); |
| 499 | btrfs_item_key_to_cpu(leaf, &key, slot + 1); |
| 500 | |
| 501 | /* Make sure the keys are in the right order */ |
| 502 | if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { |
| 503 | CORRUPT("bad key order", leaf, root, slot); |
| 504 | return -EIO; |
| 505 | } |
| 506 | |
| 507 | /* |
| 508 | * Make sure the offset and ends are right, remember that the |
| 509 | * item data starts at the end of the leaf and grows towards the |
| 510 | * front. |
| 511 | */ |
| 512 | if (btrfs_item_offset_nr(leaf, slot) != |
| 513 | btrfs_item_end_nr(leaf, slot + 1)) { |
| 514 | CORRUPT("slot offset bad", leaf, root, slot); |
| 515 | return -EIO; |
| 516 | } |
| 517 | |
| 518 | /* |
| 519 | * Check to make sure that we don't point outside of the leaf, |
| 520 | * just incase all the items are consistent to eachother, but |
| 521 | * all point outside of the leaf. |
| 522 | */ |
| 523 | if (btrfs_item_end_nr(leaf, slot) > |
| 524 | BTRFS_LEAF_DATA_SIZE(root)) { |
| 525 | CORRUPT("slot end outside of leaf", leaf, root, slot); |
| 526 | return -EIO; |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | return 0; |
| 531 | } |
| 532 | |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 533 | struct extent_buffer *find_eb_for_page(struct extent_io_tree *tree, |
| 534 | struct page *page, int max_walk) |
| 535 | { |
| 536 | struct extent_buffer *eb; |
| 537 | u64 start = page_offset(page); |
| 538 | u64 target = start; |
| 539 | u64 min_start; |
| 540 | |
| 541 | if (start < max_walk) |
| 542 | min_start = 0; |
| 543 | else |
| 544 | min_start = start - max_walk; |
| 545 | |
| 546 | while (start >= min_start) { |
| 547 | eb = find_extent_buffer(tree, start, 0); |
| 548 | if (eb) { |
| 549 | /* |
| 550 | * we found an extent buffer and it contains our page |
| 551 | * horray! |
| 552 | */ |
| 553 | if (eb->start <= target && |
| 554 | eb->start + eb->len > target) |
| 555 | return eb; |
| 556 | |
| 557 | /* we found an extent buffer that wasn't for us */ |
| 558 | free_extent_buffer(eb); |
| 559 | return NULL; |
| 560 | } |
| 561 | if (start == 0) |
| 562 | break; |
| 563 | start -= PAGE_CACHE_SIZE; |
| 564 | } |
| 565 | return NULL; |
| 566 | } |
| 567 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 568 | static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end, |
Josef Bacik | 5cf1ab5 | 2012-04-16 09:42:26 -0400 | [diff] [blame] | 569 | struct extent_state *state, int mirror) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 570 | { |
| 571 | struct extent_io_tree *tree; |
| 572 | u64 found_start; |
| 573 | int found_level; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 574 | struct extent_buffer *eb; |
| 575 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 576 | int ret = 0; |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 577 | int reads_done; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 578 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 579 | if (!page->private) |
| 580 | goto out; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 581 | |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 582 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 583 | eb = (struct extent_buffer *)page->private; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 584 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 585 | /* the pending IO might have been the only thing that kept this buffer |
| 586 | * in memory. Make sure we have a ref for all this other checks |
| 587 | */ |
| 588 | extent_buffer_get(eb); |
| 589 | |
| 590 | reads_done = atomic_dec_and_test(&eb->io_pages); |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 591 | if (!reads_done) |
| 592 | goto err; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 593 | |
Josef Bacik | 5cf1ab5 | 2012-04-16 09:42:26 -0400 | [diff] [blame] | 594 | eb->read_mirror = mirror; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 595 | if (test_bit(EXTENT_BUFFER_IOERR, &eb->bflags)) { |
| 596 | ret = -EIO; |
| 597 | goto err; |
| 598 | } |
| 599 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 600 | found_start = btrfs_header_bytenr(eb); |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 601 | if (found_start != eb->start) { |
David Sterba | 7a36dde | 2011-05-06 15:33:15 +0200 | [diff] [blame] | 602 | printk_ratelimited(KERN_INFO "btrfs bad tree block start " |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 603 | "%llu %llu\n", |
| 604 | (unsigned long long)found_start, |
| 605 | (unsigned long long)eb->start); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 606 | ret = -EIO; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 607 | goto err; |
| 608 | } |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 609 | if (check_tree_block_fsid(root, eb)) { |
David Sterba | 7a36dde | 2011-05-06 15:33:15 +0200 | [diff] [blame] | 610 | printk_ratelimited(KERN_INFO "btrfs bad fsid on block %llu\n", |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 611 | (unsigned long long)eb->start); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 612 | ret = -EIO; |
| 613 | goto err; |
| 614 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 615 | found_level = btrfs_header_level(eb); |
| 616 | |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 617 | btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), |
| 618 | eb, found_level); |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 619 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 620 | ret = csum_tree_block(root, eb, 1); |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 621 | if (ret) { |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 622 | ret = -EIO; |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 623 | goto err; |
| 624 | } |
| 625 | |
| 626 | /* |
| 627 | * If this is a leaf block and it is corrupt, set the corrupt bit so |
| 628 | * that we don't try and read the other copies of this block, just |
| 629 | * return -EIO. |
| 630 | */ |
| 631 | if (found_level == 0 && check_leaf(root, eb)) { |
| 632 | set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); |
| 633 | ret = -EIO; |
| 634 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 635 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 636 | if (!ret) |
| 637 | set_extent_buffer_uptodate(eb); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 638 | err: |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 639 | if (test_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) { |
| 640 | clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags); |
| 641 | btree_readahead_hook(root, eb, eb->start, ret); |
| 642 | } |
| 643 | |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 644 | if (ret) { |
| 645 | /* |
| 646 | * our io error hook is going to dec the io pages |
| 647 | * again, we have to make sure it has something |
| 648 | * to decrement |
| 649 | */ |
| 650 | atomic_inc(&eb->io_pages); |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 651 | clear_extent_buffer_uptodate(eb); |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 652 | } |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 653 | free_extent_buffer(eb); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 654 | out: |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 655 | return ret; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 656 | } |
| 657 | |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 658 | static int btree_io_failed_hook(struct page *page, int failed_mirror) |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 659 | { |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 660 | struct extent_buffer *eb; |
| 661 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
| 662 | |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 663 | eb = (struct extent_buffer *)page->private; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 664 | set_bit(EXTENT_BUFFER_IOERR, &eb->bflags); |
Josef Bacik | 5cf1ab5 | 2012-04-16 09:42:26 -0400 | [diff] [blame] | 665 | eb->read_mirror = failed_mirror; |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 666 | atomic_dec(&eb->io_pages); |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 667 | if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 668 | btree_readahead_hook(root, eb, eb->start, -EIO); |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 669 | return -EIO; /* we fixed nothing */ |
| 670 | } |
| 671 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 672 | static void end_workqueue_bio(struct bio *bio, int err) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 673 | { |
| 674 | struct end_io_wq *end_io_wq = bio->bi_private; |
| 675 | struct btrfs_fs_info *fs_info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 676 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 677 | fs_info = end_io_wq->info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 678 | end_io_wq->error = err; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 679 | end_io_wq->work.func = end_workqueue_fn; |
| 680 | end_io_wq->work.flags = 0; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 681 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 682 | if (bio->bi_rw & REQ_WRITE) { |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 683 | if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 684 | btrfs_queue_worker(&fs_info->endio_meta_write_workers, |
| 685 | &end_io_wq->work); |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 686 | else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 687 | btrfs_queue_worker(&fs_info->endio_freespace_worker, |
| 688 | &end_io_wq->work); |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 689 | else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) |
| 690 | btrfs_queue_worker(&fs_info->endio_raid56_workers, |
| 691 | &end_io_wq->work); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 692 | else |
| 693 | btrfs_queue_worker(&fs_info->endio_write_workers, |
| 694 | &end_io_wq->work); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 695 | } else { |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 696 | if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) |
| 697 | btrfs_queue_worker(&fs_info->endio_raid56_workers, |
| 698 | &end_io_wq->work); |
| 699 | else if (end_io_wq->metadata) |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 700 | btrfs_queue_worker(&fs_info->endio_meta_workers, |
| 701 | &end_io_wq->work); |
| 702 | else |
| 703 | btrfs_queue_worker(&fs_info->endio_workers, |
| 704 | &end_io_wq->work); |
| 705 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 706 | } |
| 707 | |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 708 | /* |
| 709 | * For the metadata arg you want |
| 710 | * |
| 711 | * 0 - if data |
| 712 | * 1 - if normal metadta |
| 713 | * 2 - if writing to the free space cache area |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 714 | * 3 - raid parity work |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 715 | */ |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 716 | int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, |
| 717 | int metadata) |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 718 | { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 719 | struct end_io_wq *end_io_wq; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 720 | end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); |
| 721 | if (!end_io_wq) |
| 722 | return -ENOMEM; |
| 723 | |
| 724 | end_io_wq->private = bio->bi_private; |
| 725 | end_io_wq->end_io = bio->bi_end_io; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 726 | end_io_wq->info = info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 727 | end_io_wq->error = 0; |
| 728 | end_io_wq->bio = bio; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 729 | end_io_wq->metadata = metadata; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 730 | |
| 731 | bio->bi_private = end_io_wq; |
| 732 | bio->bi_end_io = end_workqueue_bio; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 733 | return 0; |
| 734 | } |
| 735 | |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 736 | unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 737 | { |
| 738 | unsigned long limit = min_t(unsigned long, |
| 739 | info->workers.max_workers, |
| 740 | info->fs_devices->open_devices); |
| 741 | return 256 * limit; |
| 742 | } |
| 743 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 744 | static void run_one_async_start(struct btrfs_work *work) |
| 745 | { |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 746 | struct async_submit_bio *async; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 747 | int ret; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 748 | |
| 749 | async = container_of(work, struct async_submit_bio, work); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 750 | ret = async->submit_bio_start(async->inode, async->rw, async->bio, |
| 751 | async->mirror_num, async->bio_flags, |
| 752 | async->bio_offset); |
| 753 | if (ret) |
| 754 | async->error = ret; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 755 | } |
| 756 | |
| 757 | static void run_one_async_done(struct btrfs_work *work) |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 758 | { |
| 759 | struct btrfs_fs_info *fs_info; |
| 760 | struct async_submit_bio *async; |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 761 | int limit; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 762 | |
| 763 | async = container_of(work, struct async_submit_bio, work); |
| 764 | fs_info = BTRFS_I(async->inode)->root->fs_info; |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 765 | |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 766 | limit = btrfs_async_submit_limit(fs_info); |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 767 | limit = limit * 2 / 3; |
| 768 | |
Josef Bacik | 66657b3 | 2012-08-01 15:36:24 -0400 | [diff] [blame] | 769 | if (atomic_dec_return(&fs_info->nr_async_submits) < limit && |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 770 | waitqueue_active(&fs_info->async_submit_wait)) |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 771 | wake_up(&fs_info->async_submit_wait); |
| 772 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 773 | /* If an error occured we just want to clean up the bio and move on */ |
| 774 | if (async->error) { |
| 775 | bio_endio(async->bio, async->error); |
| 776 | return; |
| 777 | } |
| 778 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 779 | async->submit_bio_done(async->inode, async->rw, async->bio, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 780 | async->mirror_num, async->bio_flags, |
| 781 | async->bio_offset); |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 782 | } |
| 783 | |
| 784 | static void run_one_async_free(struct btrfs_work *work) |
| 785 | { |
| 786 | struct async_submit_bio *async; |
| 787 | |
| 788 | async = container_of(work, struct async_submit_bio, work); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 789 | kfree(async); |
| 790 | } |
| 791 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 792 | int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, |
| 793 | int rw, struct bio *bio, int mirror_num, |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 794 | unsigned long bio_flags, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 795 | u64 bio_offset, |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 796 | extent_submit_bio_hook_t *submit_bio_start, |
| 797 | extent_submit_bio_hook_t *submit_bio_done) |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 798 | { |
| 799 | struct async_submit_bio *async; |
| 800 | |
| 801 | async = kmalloc(sizeof(*async), GFP_NOFS); |
| 802 | if (!async) |
| 803 | return -ENOMEM; |
| 804 | |
| 805 | async->inode = inode; |
| 806 | async->rw = rw; |
| 807 | async->bio = bio; |
| 808 | async->mirror_num = mirror_num; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 809 | async->submit_bio_start = submit_bio_start; |
| 810 | async->submit_bio_done = submit_bio_done; |
| 811 | |
| 812 | async->work.func = run_one_async_start; |
| 813 | async->work.ordered_func = run_one_async_done; |
| 814 | async->work.ordered_free = run_one_async_free; |
| 815 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 816 | async->work.flags = 0; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 817 | async->bio_flags = bio_flags; |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 818 | async->bio_offset = bio_offset; |
Chris Mason | 8c8bee1 | 2008-09-29 11:19:10 -0400 | [diff] [blame] | 819 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 820 | async->error = 0; |
| 821 | |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 822 | atomic_inc(&fs_info->nr_async_submits); |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 823 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 824 | if (rw & REQ_SYNC) |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 825 | btrfs_set_work_high_prio(&async->work); |
| 826 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 827 | btrfs_queue_worker(&fs_info->workers, &async->work); |
Chris Mason | 9473f16 | 2008-08-28 06:15:24 -0400 | [diff] [blame] | 828 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 829 | while (atomic_read(&fs_info->async_submit_draining) && |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 830 | atomic_read(&fs_info->nr_async_submits)) { |
| 831 | wait_event(fs_info->async_submit_wait, |
| 832 | (atomic_read(&fs_info->nr_async_submits) == 0)); |
| 833 | } |
| 834 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 835 | return 0; |
| 836 | } |
| 837 | |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 838 | static int btree_csum_one_bio(struct bio *bio) |
| 839 | { |
| 840 | struct bio_vec *bvec = bio->bi_io_vec; |
| 841 | int bio_index = 0; |
| 842 | struct btrfs_root *root; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 843 | int ret = 0; |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 844 | |
| 845 | WARN_ON(bio->bi_vcnt <= 0); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 846 | while (bio_index < bio->bi_vcnt) { |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 847 | root = BTRFS_I(bvec->bv_page->mapping->host)->root; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 848 | ret = csum_dirty_buffer(root, bvec->bv_page); |
| 849 | if (ret) |
| 850 | break; |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 851 | bio_index++; |
| 852 | bvec++; |
| 853 | } |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 854 | return ret; |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 855 | } |
| 856 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 857 | static int __btree_submit_bio_start(struct inode *inode, int rw, |
| 858 | struct bio *bio, int mirror_num, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 859 | unsigned long bio_flags, |
| 860 | u64 bio_offset) |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 861 | { |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 862 | /* |
| 863 | * 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] | 864 | * submission context. Just jump into btrfs_map_bio |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 865 | */ |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 866 | return btree_csum_one_bio(bio); |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 867 | } |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 868 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 869 | 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] | 870 | int mirror_num, unsigned long bio_flags, |
| 871 | u64 bio_offset) |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 872 | { |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 873 | int ret; |
| 874 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 875 | /* |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 876 | * when we're called for a write, we're already in the async |
| 877 | * submission context. Just jump into btrfs_map_bio |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 878 | */ |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 879 | ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); |
| 880 | if (ret) |
| 881 | bio_endio(bio, ret); |
| 882 | return ret; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 883 | } |
| 884 | |
Josef Bacik | de0022b | 2012-09-25 14:25:58 -0400 | [diff] [blame] | 885 | static int check_async_write(struct inode *inode, unsigned long bio_flags) |
| 886 | { |
| 887 | if (bio_flags & EXTENT_BIO_TREE_LOG) |
| 888 | return 0; |
| 889 | #ifdef CONFIG_X86 |
| 890 | if (cpu_has_xmm4_2) |
| 891 | return 0; |
| 892 | #endif |
| 893 | return 1; |
| 894 | } |
| 895 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 896 | 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] | 897 | int mirror_num, unsigned long bio_flags, |
| 898 | u64 bio_offset) |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 899 | { |
Josef Bacik | de0022b | 2012-09-25 14:25:58 -0400 | [diff] [blame] | 900 | int async = check_async_write(inode, bio_flags); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 901 | int ret; |
| 902 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 903 | if (!(rw & REQ_WRITE)) { |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 904 | /* |
| 905 | * called for a read, do the setup so that checksum validation |
| 906 | * can happen in the async kernel threads |
| 907 | */ |
Chris Mason | f3f266a | 2012-03-23 10:22:46 -0400 | [diff] [blame] | 908 | ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, |
| 909 | bio, 1); |
Chris Mason | 1d4284b | 2012-03-28 20:31:37 -0400 | [diff] [blame] | 910 | if (ret) |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 911 | goto out_w_error; |
| 912 | ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, |
| 913 | mirror_num, 0); |
Josef Bacik | de0022b | 2012-09-25 14:25:58 -0400 | [diff] [blame] | 914 | } else if (!async) { |
| 915 | ret = btree_csum_one_bio(bio); |
| 916 | if (ret) |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 917 | goto out_w_error; |
| 918 | ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, |
| 919 | mirror_num, 0); |
| 920 | } else { |
| 921 | /* |
| 922 | * kthread helpers are used to submit writes so that |
| 923 | * checksumming can happen in parallel across all CPUs |
| 924 | */ |
| 925 | ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, |
| 926 | inode, rw, bio, mirror_num, 0, |
| 927 | bio_offset, |
| 928 | __btree_submit_bio_start, |
| 929 | __btree_submit_bio_done); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 930 | } |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 931 | |
Stefan Behrens | 6189192 | 2012-11-05 18:51:52 +0100 | [diff] [blame] | 932 | if (ret) { |
| 933 | out_w_error: |
| 934 | bio_endio(bio, ret); |
| 935 | } |
| 936 | return ret; |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 937 | } |
| 938 | |
Jan Beulich | 3dd1462 | 2010-12-07 14:54:09 +0000 | [diff] [blame] | 939 | #ifdef CONFIG_MIGRATION |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 940 | static int btree_migratepage(struct address_space *mapping, |
Mel Gorman | a6bc32b | 2012-01-12 17:19:43 -0800 | [diff] [blame] | 941 | struct page *newpage, struct page *page, |
| 942 | enum migrate_mode mode) |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 943 | { |
| 944 | /* |
| 945 | * we can't safely write a btree page from here, |
| 946 | * we haven't done the locking hook |
| 947 | */ |
| 948 | if (PageDirty(page)) |
| 949 | return -EAGAIN; |
| 950 | /* |
| 951 | * Buffers may be managed in a filesystem specific way. |
| 952 | * We must have no buffers or drop them. |
| 953 | */ |
| 954 | if (page_has_private(page) && |
| 955 | !try_to_release_page(page, GFP_KERNEL)) |
| 956 | return -EAGAIN; |
Mel Gorman | a6bc32b | 2012-01-12 17:19:43 -0800 | [diff] [blame] | 957 | return migrate_page(mapping, newpage, page, mode); |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 958 | } |
Jan Beulich | 3dd1462 | 2010-12-07 14:54:09 +0000 | [diff] [blame] | 959 | #endif |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 960 | |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 961 | |
| 962 | static int btree_writepages(struct address_space *mapping, |
| 963 | struct writeback_control *wbc) |
| 964 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 965 | struct extent_io_tree *tree; |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 966 | struct btrfs_fs_info *fs_info; |
| 967 | int ret; |
| 968 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 969 | tree = &BTRFS_I(mapping->host)->io_tree; |
Chris Mason | d8d5f3e | 2007-12-11 12:42:00 -0500 | [diff] [blame] | 970 | if (wbc->sync_mode == WB_SYNC_NONE) { |
Chris Mason | 448d640 | 2007-11-27 07:52:01 -0800 | [diff] [blame] | 971 | |
| 972 | if (wbc->for_kupdate) |
| 973 | return 0; |
| 974 | |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 975 | fs_info = BTRFS_I(mapping->host)->root->fs_info; |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 976 | /* this is a bit racy, but that's ok */ |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 977 | ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, |
| 978 | BTRFS_DIRTY_METADATA_THRESH); |
| 979 | if (ret < 0) |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 980 | return 0; |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 981 | } |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 982 | return btree_write_cache_pages(mapping, wbc); |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 983 | } |
| 984 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 985 | static int btree_readpage(struct file *file, struct page *page) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 986 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 987 | struct extent_io_tree *tree; |
| 988 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Jan Schmidt | 8ddc7d9 | 2011-06-13 20:02:58 +0200 | [diff] [blame] | 989 | return extent_read_full_page(tree, page, btree_get_extent, 0); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 990 | } |
| 991 | |
Chris Mason | 70dec80 | 2008-01-29 09:59:12 -0500 | [diff] [blame] | 992 | static int btree_releasepage(struct page *page, gfp_t gfp_flags) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 993 | { |
Chris Mason | 98509cf | 2008-09-11 15:51:43 -0400 | [diff] [blame] | 994 | if (PageWriteback(page) || PageDirty(page)) |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 995 | return 0; |
David Sterba | 0c4e538 | 2012-01-26 15:01:12 -0500 | [diff] [blame] | 996 | /* |
| 997 | * We need to mask out eg. __GFP_HIGHMEM and __GFP_DMA32 as we're doing |
| 998 | * slab allocation from alloc_extent_state down the callchain where |
| 999 | * it'd hit a BUG_ON as those flags are not allowed. |
| 1000 | */ |
| 1001 | gfp_flags &= ~GFP_SLAB_BUG_MASK; |
| 1002 | |
Josef Bacik | 3083ee2 | 2012-03-09 16:01:49 -0500 | [diff] [blame] | 1003 | return try_release_extent_buffer(page, gfp_flags); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1004 | } |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 1005 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1006 | static void btree_invalidatepage(struct page *page, unsigned long offset) |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1007 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1008 | struct extent_io_tree *tree; |
| 1009 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1010 | extent_invalidatepage(tree, page, offset); |
| 1011 | btree_releasepage(page, GFP_NOFS); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 1012 | if (PagePrivate(page)) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1013 | printk(KERN_WARNING "btrfs warning page private not zero " |
| 1014 | "on page %llu\n", (unsigned long long)page_offset(page)); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 1015 | ClearPagePrivate(page); |
| 1016 | set_page_private(page, 0); |
| 1017 | page_cache_release(page); |
| 1018 | } |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1019 | } |
| 1020 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1021 | static int btree_set_page_dirty(struct page *page) |
| 1022 | { |
Josef Bacik | bb146eb | 2012-10-15 13:30:43 -0400 | [diff] [blame] | 1023 | #ifdef DEBUG |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1024 | struct extent_buffer *eb; |
| 1025 | |
| 1026 | BUG_ON(!PagePrivate(page)); |
| 1027 | eb = (struct extent_buffer *)page->private; |
| 1028 | BUG_ON(!eb); |
| 1029 | BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); |
| 1030 | BUG_ON(!atomic_read(&eb->refs)); |
| 1031 | btrfs_assert_tree_locked(eb); |
Josef Bacik | bb146eb | 2012-10-15 13:30:43 -0400 | [diff] [blame] | 1032 | #endif |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1033 | return __set_page_dirty_nobuffers(page); |
| 1034 | } |
| 1035 | |
Alexey Dobriyan | 7f09410 | 2009-09-21 17:01:10 -0700 | [diff] [blame] | 1036 | static const struct address_space_operations btree_aops = { |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1037 | .readpage = btree_readpage, |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 1038 | .writepages = btree_writepages, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1039 | .releasepage = btree_releasepage, |
| 1040 | .invalidatepage = btree_invalidatepage, |
Chris Mason | 5a92bc8 | 2010-11-29 09:49:11 -0500 | [diff] [blame] | 1041 | #ifdef CONFIG_MIGRATION |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 1042 | .migratepage = btree_migratepage, |
Chris Mason | 5a92bc8 | 2010-11-29 09:49:11 -0500 | [diff] [blame] | 1043 | #endif |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1044 | .set_page_dirty = btree_set_page_dirty, |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1045 | }; |
| 1046 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 1047 | int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, |
| 1048 | u64 parent_transid) |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 1049 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1050 | struct extent_buffer *buf = NULL; |
| 1051 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 1052 | int ret = 0; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 1053 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1054 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1055 | if (!buf) |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 1056 | return 0; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1057 | read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, |
Arne Jansen | bb82ab8 | 2011-06-10 14:06:53 +0200 | [diff] [blame] | 1058 | buf, 0, WAIT_NONE, btree_get_extent, 0); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1059 | free_extent_buffer(buf); |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 1060 | return ret; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 1061 | } |
| 1062 | |
Arne Jansen | ab0fff0 | 2011-05-23 14:25:41 +0200 | [diff] [blame] | 1063 | int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, |
| 1064 | int mirror_num, struct extent_buffer **eb) |
| 1065 | { |
| 1066 | struct extent_buffer *buf = NULL; |
| 1067 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 1068 | struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; |
| 1069 | int ret; |
| 1070 | |
| 1071 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
| 1072 | if (!buf) |
| 1073 | return 0; |
| 1074 | |
| 1075 | set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); |
| 1076 | |
| 1077 | ret = read_extent_buffer_pages(io_tree, buf, 0, WAIT_PAGE_LOCK, |
| 1078 | btree_get_extent, mirror_num); |
| 1079 | if (ret) { |
| 1080 | free_extent_buffer(buf); |
| 1081 | return ret; |
| 1082 | } |
| 1083 | |
| 1084 | if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { |
| 1085 | free_extent_buffer(buf); |
| 1086 | return -EIO; |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1087 | } else if (extent_buffer_uptodate(buf)) { |
Arne Jansen | ab0fff0 | 2011-05-23 14:25:41 +0200 | [diff] [blame] | 1088 | *eb = buf; |
| 1089 | } else { |
| 1090 | free_extent_buffer(buf); |
| 1091 | } |
| 1092 | return 0; |
| 1093 | } |
| 1094 | |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 1095 | struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, |
| 1096 | u64 bytenr, u32 blocksize) |
| 1097 | { |
| 1098 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 1099 | struct extent_buffer *eb; |
| 1100 | eb = find_extent_buffer(&BTRFS_I(btree_inode)->io_tree, |
David Sterba | f09d1f6 | 2011-04-21 01:08:01 +0200 | [diff] [blame] | 1101 | bytenr, blocksize); |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 1102 | return eb; |
| 1103 | } |
| 1104 | |
| 1105 | struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, |
| 1106 | u64 bytenr, u32 blocksize) |
| 1107 | { |
| 1108 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 1109 | struct extent_buffer *eb; |
| 1110 | |
| 1111 | eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree, |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 1112 | bytenr, blocksize); |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 1113 | return eb; |
| 1114 | } |
| 1115 | |
| 1116 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1117 | int btrfs_write_tree_block(struct extent_buffer *buf) |
| 1118 | { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 1119 | return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, |
Christoph Hellwig | 8aa38c3 | 2009-10-01 12:58:30 -0400 | [diff] [blame] | 1120 | buf->start + buf->len - 1); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1121 | } |
| 1122 | |
| 1123 | int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) |
| 1124 | { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 1125 | return filemap_fdatawait_range(buf->pages[0]->mapping, |
Christoph Hellwig | 8aa38c3 | 2009-10-01 12:58:30 -0400 | [diff] [blame] | 1126 | buf->start, buf->start + buf->len - 1); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1127 | } |
| 1128 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1129 | struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 1130 | u32 blocksize, u64 parent_transid) |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1131 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1132 | struct extent_buffer *buf = NULL; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1133 | int ret; |
| 1134 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1135 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1136 | if (!buf) |
| 1137 | return NULL; |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 1138 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 1139 | ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1140 | return buf; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1141 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1142 | } |
| 1143 | |
Jeff Mahoney | d5c13f9 | 2012-03-01 14:56:27 +0100 | [diff] [blame] | 1144 | void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 1145 | struct extent_buffer *buf) |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 1146 | { |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 1147 | struct btrfs_fs_info *fs_info = root->fs_info; |
| 1148 | |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 1149 | if (btrfs_header_generation(buf) == |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 1150 | fs_info->running_transaction->transid) { |
Chris Mason | b9447ef | 2009-03-09 11:45:38 -0400 | [diff] [blame] | 1151 | btrfs_assert_tree_locked(buf); |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 1152 | |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 1153 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 1154 | __percpu_counter_add(&fs_info->dirty_metadata_bytes, |
| 1155 | -buf->len, |
| 1156 | fs_info->dirty_metadata_batch); |
Josef Bacik | ed7b63e | 2012-10-15 13:33:54 -0400 | [diff] [blame] | 1157 | /* ugh, clear_extent_buffer_dirty needs to lock the page */ |
| 1158 | btrfs_set_lock_blocking(buf); |
| 1159 | clear_extent_buffer_dirty(buf); |
| 1160 | } |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1161 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1162 | } |
| 1163 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 1164 | static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, |
| 1165 | u32 stripesize, struct btrfs_root *root, |
| 1166 | struct btrfs_fs_info *fs_info, |
| 1167 | u64 objectid) |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 1168 | { |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 1169 | root->node = NULL; |
Chris Mason | a28ec19 | 2007-03-06 20:08:01 -0500 | [diff] [blame] | 1170 | root->commit_root = NULL; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1171 | root->sectorsize = sectorsize; |
| 1172 | root->nodesize = nodesize; |
| 1173 | root->leafsize = leafsize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1174 | root->stripesize = stripesize; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 1175 | root->ref_cows = 0; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1176 | root->track_dirty = 0; |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 1177 | root->in_radix = 0; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1178 | root->orphan_item_inserted = 0; |
| 1179 | root->orphan_cleanup_state = 0; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1180 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1181 | root->objectid = objectid; |
| 1182 | root->last_trans = 0; |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1183 | root->highest_objectid = 0; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1184 | root->name = NULL; |
Eric Paris | 6bef4d3 | 2010-02-23 19:43:04 +0000 | [diff] [blame] | 1185 | root->inode_tree = RB_ROOT; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 1186 | INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1187 | root->block_rsv = NULL; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1188 | root->orphan_block_rsv = NULL; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1189 | |
| 1190 | INIT_LIST_HEAD(&root->dirty_list); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1191 | INIT_LIST_HEAD(&root->root_list); |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 1192 | INIT_LIST_HEAD(&root->logged_list[0]); |
| 1193 | INIT_LIST_HEAD(&root->logged_list[1]); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1194 | spin_lock_init(&root->orphan_lock); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1195 | spin_lock_init(&root->inode_lock); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1196 | spin_lock_init(&root->accounting_lock); |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 1197 | spin_lock_init(&root->log_extents_lock[0]); |
| 1198 | spin_lock_init(&root->log_extents_lock[1]); |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1199 | mutex_init(&root->objectid_mutex); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1200 | mutex_init(&root->log_mutex); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1201 | init_waitqueue_head(&root->log_writer_wait); |
| 1202 | init_waitqueue_head(&root->log_commit_wait[0]); |
| 1203 | init_waitqueue_head(&root->log_commit_wait[1]); |
| 1204 | atomic_set(&root->log_commit[0], 0); |
| 1205 | atomic_set(&root->log_commit[1], 0); |
| 1206 | atomic_set(&root->log_writers, 0); |
Miao Xie | 2ecb792 | 2012-09-06 04:04:27 -0600 | [diff] [blame] | 1207 | atomic_set(&root->log_batch, 0); |
Josef Bacik | 8a35d95 | 2012-05-23 14:26:42 -0400 | [diff] [blame] | 1208 | atomic_set(&root->orphan_inodes, 0); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1209 | root->log_transid = 0; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 1210 | root->last_log_commit = 0; |
Chris Mason | d0c803c | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 1211 | extent_io_tree_init(&root->dirty_log_pages, |
David Sterba | f993c88 | 2011-04-20 23:35:57 +0200 | [diff] [blame] | 1212 | fs_info->btree_inode->i_mapping); |
Chris Mason | 017e536 | 2008-07-28 15:32:51 -0400 | [diff] [blame] | 1213 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1214 | memset(&root->root_key, 0, sizeof(root->root_key)); |
| 1215 | memset(&root->root_item, 0, sizeof(root->root_item)); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 1216 | memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1217 | memset(&root->root_kobj, 0, sizeof(root->root_kobj)); |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1218 | root->defrag_trans_start = fs_info->generation; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1219 | init_completion(&root->kobj_unregister); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 1220 | root->defrag_running = 0; |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 1221 | root->root_key.objectid = objectid; |
Al Viro | 0ee5dc6 | 2011-07-07 15:44:25 -0400 | [diff] [blame] | 1222 | root->anon_dev = 0; |
Alexander Block | 8ea05e3 | 2012-07-25 17:35:53 +0200 | [diff] [blame] | 1223 | |
Anand Jain | 5f3ab90 | 2012-12-07 09:28:54 +0000 | [diff] [blame] | 1224 | spin_lock_init(&root->root_item_lock); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1225 | } |
| 1226 | |
Jeff Mahoney | 200a5c1 | 2011-10-03 23:22:43 -0400 | [diff] [blame] | 1227 | static int __must_check find_and_setup_root(struct btrfs_root *tree_root, |
| 1228 | struct btrfs_fs_info *fs_info, |
| 1229 | u64 objectid, |
| 1230 | struct btrfs_root *root) |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1231 | { |
| 1232 | int ret; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1233 | u32 blocksize; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1234 | u64 generation; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1235 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1236 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1237 | tree_root->sectorsize, tree_root->stripesize, |
| 1238 | root, fs_info, objectid); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1239 | ret = btrfs_find_last_root(tree_root, objectid, |
| 1240 | &root->root_item, &root->root_key); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1241 | if (ret > 0) |
| 1242 | return -ENOENT; |
Jeff Mahoney | 200a5c1 | 2011-10-03 23:22:43 -0400 | [diff] [blame] | 1243 | else if (ret < 0) |
| 1244 | return ret; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1245 | |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1246 | generation = btrfs_root_generation(&root->root_item); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1247 | blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1248 | root->commit_root = NULL; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1249 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1250 | blocksize, generation); |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 1251 | if (!root->node || !btrfs_buffer_uptodate(root->node, generation, 0)) { |
Chris Mason | 68433b7 | 2010-12-13 14:47:58 -0500 | [diff] [blame] | 1252 | free_extent_buffer(root->node); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1253 | root->node = NULL; |
Chris Mason | 68433b7 | 2010-12-13 14:47:58 -0500 | [diff] [blame] | 1254 | return -EIO; |
| 1255 | } |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1256 | root->commit_root = btrfs_root_node(root); |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 1257 | return 0; |
| 1258 | } |
| 1259 | |
Al Viro | f84a8bd | 2011-11-17 15:57:57 -0500 | [diff] [blame] | 1260 | static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info) |
Al Viro | 6f07e42 | 2011-11-17 00:46:16 -0500 | [diff] [blame] | 1261 | { |
| 1262 | struct btrfs_root *root = kzalloc(sizeof(*root), GFP_NOFS); |
| 1263 | if (root) |
| 1264 | root->fs_info = fs_info; |
| 1265 | return root; |
| 1266 | } |
| 1267 | |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1268 | struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, |
| 1269 | struct btrfs_fs_info *fs_info, |
| 1270 | u64 objectid) |
| 1271 | { |
| 1272 | struct extent_buffer *leaf; |
| 1273 | struct btrfs_root *tree_root = fs_info->tree_root; |
| 1274 | struct btrfs_root *root; |
| 1275 | struct btrfs_key key; |
| 1276 | int ret = 0; |
| 1277 | u64 bytenr; |
| 1278 | |
| 1279 | root = btrfs_alloc_root(fs_info); |
| 1280 | if (!root) |
| 1281 | return ERR_PTR(-ENOMEM); |
| 1282 | |
| 1283 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
| 1284 | tree_root->sectorsize, tree_root->stripesize, |
| 1285 | root, fs_info, objectid); |
| 1286 | root->root_key.objectid = objectid; |
| 1287 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; |
| 1288 | root->root_key.offset = 0; |
| 1289 | |
| 1290 | leaf = btrfs_alloc_free_block(trans, root, root->leafsize, |
| 1291 | 0, objectid, NULL, 0, 0, 0); |
| 1292 | if (IS_ERR(leaf)) { |
| 1293 | ret = PTR_ERR(leaf); |
Tsutomu Itoh | 1dd0568 | 2013-03-21 04:32:32 +0000 | [diff] [blame] | 1294 | leaf = NULL; |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1295 | goto fail; |
| 1296 | } |
| 1297 | |
| 1298 | bytenr = leaf->start; |
| 1299 | memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); |
| 1300 | btrfs_set_header_bytenr(leaf, leaf->start); |
| 1301 | btrfs_set_header_generation(leaf, trans->transid); |
| 1302 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); |
| 1303 | btrfs_set_header_owner(leaf, objectid); |
| 1304 | root->node = leaf; |
| 1305 | |
| 1306 | write_extent_buffer(leaf, fs_info->fsid, |
| 1307 | (unsigned long)btrfs_header_fsid(leaf), |
| 1308 | BTRFS_FSID_SIZE); |
| 1309 | write_extent_buffer(leaf, fs_info->chunk_tree_uuid, |
| 1310 | (unsigned long)btrfs_header_chunk_tree_uuid(leaf), |
| 1311 | BTRFS_UUID_SIZE); |
| 1312 | btrfs_mark_buffer_dirty(leaf); |
| 1313 | |
| 1314 | root->commit_root = btrfs_root_node(root); |
| 1315 | root->track_dirty = 1; |
| 1316 | |
| 1317 | |
| 1318 | root->root_item.flags = 0; |
| 1319 | root->root_item.byte_limit = 0; |
| 1320 | btrfs_set_root_bytenr(&root->root_item, leaf->start); |
| 1321 | btrfs_set_root_generation(&root->root_item, trans->transid); |
| 1322 | btrfs_set_root_level(&root->root_item, 0); |
| 1323 | btrfs_set_root_refs(&root->root_item, 1); |
| 1324 | btrfs_set_root_used(&root->root_item, leaf->len); |
| 1325 | btrfs_set_root_last_snapshot(&root->root_item, 0); |
| 1326 | btrfs_set_root_dirid(&root->root_item, 0); |
| 1327 | root->root_item.drop_level = 0; |
| 1328 | |
| 1329 | key.objectid = objectid; |
| 1330 | key.type = BTRFS_ROOT_ITEM_KEY; |
| 1331 | key.offset = 0; |
| 1332 | ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); |
| 1333 | if (ret) |
| 1334 | goto fail; |
| 1335 | |
| 1336 | btrfs_tree_unlock(leaf); |
| 1337 | |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1338 | return root; |
Tsutomu Itoh | 1dd0568 | 2013-03-21 04:32:32 +0000 | [diff] [blame] | 1339 | |
| 1340 | fail: |
| 1341 | if (leaf) { |
| 1342 | btrfs_tree_unlock(leaf); |
| 1343 | free_extent_buffer(leaf); |
| 1344 | } |
| 1345 | kfree(root); |
| 1346 | |
| 1347 | return ERR_PTR(ret); |
Arne Jansen | 20897f5 | 2011-09-13 12:44:20 +0200 | [diff] [blame] | 1348 | } |
| 1349 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1350 | static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, |
| 1351 | struct btrfs_fs_info *fs_info) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1352 | { |
| 1353 | struct btrfs_root *root; |
| 1354 | struct btrfs_root *tree_root = fs_info->tree_root; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1355 | struct extent_buffer *leaf; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1356 | |
Al Viro | 6f07e42 | 2011-11-17 00:46:16 -0500 | [diff] [blame] | 1357 | root = btrfs_alloc_root(fs_info); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1358 | if (!root) |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1359 | return ERR_PTR(-ENOMEM); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1360 | |
| 1361 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
| 1362 | tree_root->sectorsize, tree_root->stripesize, |
| 1363 | root, fs_info, BTRFS_TREE_LOG_OBJECTID); |
| 1364 | |
| 1365 | root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; |
| 1366 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; |
| 1367 | root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1368 | /* |
| 1369 | * log trees do not get reference counted because they go away |
| 1370 | * before a real commit is actually done. They do store pointers |
| 1371 | * to file data extents, and those reference counts still get |
| 1372 | * updated (along with back refs to the log tree). |
| 1373 | */ |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1374 | root->ref_cows = 0; |
| 1375 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1376 | leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, |
Arne Jansen | 66d7e7f | 2011-09-12 15:26:38 +0200 | [diff] [blame] | 1377 | BTRFS_TREE_LOG_OBJECTID, NULL, |
Jan Schmidt | 5581a51 | 2012-05-16 17:04:52 +0200 | [diff] [blame] | 1378 | 0, 0, 0); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1379 | if (IS_ERR(leaf)) { |
| 1380 | kfree(root); |
| 1381 | return ERR_CAST(leaf); |
| 1382 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1383 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1384 | memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); |
| 1385 | btrfs_set_header_bytenr(leaf, leaf->start); |
| 1386 | btrfs_set_header_generation(leaf, trans->transid); |
| 1387 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); |
| 1388 | btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1389 | root->node = leaf; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1390 | |
| 1391 | write_extent_buffer(root->node, root->fs_info->fsid, |
| 1392 | (unsigned long)btrfs_header_fsid(root->node), |
| 1393 | BTRFS_FSID_SIZE); |
| 1394 | btrfs_mark_buffer_dirty(root->node); |
| 1395 | btrfs_tree_unlock(root->node); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1396 | return root; |
| 1397 | } |
| 1398 | |
| 1399 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, |
| 1400 | struct btrfs_fs_info *fs_info) |
| 1401 | { |
| 1402 | struct btrfs_root *log_root; |
| 1403 | |
| 1404 | log_root = alloc_log_tree(trans, fs_info); |
| 1405 | if (IS_ERR(log_root)) |
| 1406 | return PTR_ERR(log_root); |
| 1407 | WARN_ON(fs_info->log_root_tree); |
| 1408 | fs_info->log_root_tree = log_root; |
| 1409 | return 0; |
| 1410 | } |
| 1411 | |
| 1412 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, |
| 1413 | struct btrfs_root *root) |
| 1414 | { |
| 1415 | struct btrfs_root *log_root; |
| 1416 | struct btrfs_inode_item *inode_item; |
| 1417 | |
| 1418 | log_root = alloc_log_tree(trans, root->fs_info); |
| 1419 | if (IS_ERR(log_root)) |
| 1420 | return PTR_ERR(log_root); |
| 1421 | |
| 1422 | log_root->last_trans = trans->transid; |
| 1423 | log_root->root_key.offset = root->root_key.objectid; |
| 1424 | |
| 1425 | inode_item = &log_root->root_item.inode; |
| 1426 | inode_item->generation = cpu_to_le64(1); |
| 1427 | inode_item->size = cpu_to_le64(3); |
| 1428 | inode_item->nlink = cpu_to_le32(1); |
| 1429 | inode_item->nbytes = cpu_to_le64(root->leafsize); |
| 1430 | inode_item->mode = cpu_to_le32(S_IFDIR | 0755); |
| 1431 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1432 | btrfs_set_root_node(&log_root->root_item, log_root->node); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1433 | |
| 1434 | WARN_ON(root->log_root); |
| 1435 | root->log_root = log_root; |
| 1436 | root->log_transid = 0; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 1437 | root->last_log_commit = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1438 | return 0; |
| 1439 | } |
| 1440 | |
| 1441 | struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, |
| 1442 | struct btrfs_key *location) |
| 1443 | { |
| 1444 | struct btrfs_root *root; |
| 1445 | struct btrfs_fs_info *fs_info = tree_root->fs_info; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1446 | struct btrfs_path *path; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1447 | struct extent_buffer *l; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1448 | u64 generation; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1449 | u32 blocksize; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1450 | int ret = 0; |
Alexander Block | 8ea05e3 | 2012-07-25 17:35:53 +0200 | [diff] [blame] | 1451 | int slot; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1452 | |
Al Viro | 6f07e42 | 2011-11-17 00:46:16 -0500 | [diff] [blame] | 1453 | root = btrfs_alloc_root(fs_info); |
Chris Mason | 0cf6c62 | 2007-06-09 09:22:25 -0400 | [diff] [blame] | 1454 | if (!root) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1455 | return ERR_PTR(-ENOMEM); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1456 | if (location->offset == (u64)-1) { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1457 | ret = find_and_setup_root(tree_root, fs_info, |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1458 | location->objectid, root); |
| 1459 | if (ret) { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1460 | kfree(root); |
| 1461 | return ERR_PTR(ret); |
| 1462 | } |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1463 | goto out; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1464 | } |
| 1465 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1466 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1467 | tree_root->sectorsize, tree_root->stripesize, |
| 1468 | root, fs_info, location->objectid); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1469 | |
| 1470 | path = btrfs_alloc_path(); |
Tsutomu Itoh | db5b493 | 2011-03-23 08:14:16 +0000 | [diff] [blame] | 1471 | if (!path) { |
| 1472 | kfree(root); |
| 1473 | return ERR_PTR(-ENOMEM); |
| 1474 | } |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1475 | ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1476 | if (ret == 0) { |
| 1477 | l = path->nodes[0]; |
Alexander Block | 8ea05e3 | 2012-07-25 17:35:53 +0200 | [diff] [blame] | 1478 | slot = path->slots[0]; |
| 1479 | btrfs_read_root_item(tree_root, l, slot, &root->root_item); |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1480 | memcpy(&root->root_key, location, sizeof(*location)); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1481 | } |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1482 | btrfs_free_path(path); |
| 1483 | if (ret) { |
Tsutomu Itoh | 5e540f7 | 2010-12-27 06:53:10 +0000 | [diff] [blame] | 1484 | kfree(root); |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1485 | if (ret > 0) |
| 1486 | ret = -ENOENT; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1487 | return ERR_PTR(ret); |
| 1488 | } |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1489 | |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1490 | generation = btrfs_root_generation(&root->root_item); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1491 | blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); |
| 1492 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1493 | blocksize, generation); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1494 | root->commit_root = btrfs_root_node(root); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 1495 | BUG_ON(!root->node); /* -ENOMEM */ |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1496 | out: |
Li Zefan | 08fe4db | 2011-03-28 02:01:25 +0000 | [diff] [blame] | 1497 | if (location->objectid != BTRFS_TREE_LOG_OBJECTID) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1498 | root->ref_cows = 1; |
Li Zefan | 08fe4db | 2011-03-28 02:01:25 +0000 | [diff] [blame] | 1499 | btrfs_check_and_init_root_item(&root->root_item); |
| 1500 | } |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1501 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1502 | return root; |
| 1503 | } |
| 1504 | |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1505 | struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, |
| 1506 | struct btrfs_key *location) |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1507 | { |
| 1508 | struct btrfs_root *root; |
| 1509 | int ret; |
| 1510 | |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1511 | if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) |
| 1512 | return fs_info->tree_root; |
| 1513 | if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) |
| 1514 | return fs_info->extent_root; |
Chris Mason | 8f18cf1 | 2008-04-25 16:53:30 -0400 | [diff] [blame] | 1515 | if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) |
| 1516 | return fs_info->chunk_root; |
| 1517 | if (location->objectid == BTRFS_DEV_TREE_OBJECTID) |
| 1518 | return fs_info->dev_root; |
Yan Zheng | 0403e47 | 2008-12-10 20:32:51 -0500 | [diff] [blame] | 1519 | if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) |
| 1520 | return fs_info->csum_root; |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 1521 | if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) |
| 1522 | return fs_info->quota_root ? fs_info->quota_root : |
| 1523 | ERR_PTR(-ENOENT); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1524 | again: |
| 1525 | spin_lock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1526 | root = radix_tree_lookup(&fs_info->fs_roots_radix, |
| 1527 | (unsigned long)location->objectid); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1528 | spin_unlock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1529 | if (root) |
| 1530 | return root; |
| 1531 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1532 | root = btrfs_read_fs_root_no_radix(fs_info->tree_root, location); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1533 | if (IS_ERR(root)) |
| 1534 | return root; |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 1535 | |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 1536 | root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 1537 | root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), |
| 1538 | GFP_NOFS); |
David Sterba | 35a30d7 | 2011-06-13 15:18:23 +0000 | [diff] [blame] | 1539 | if (!root->free_ino_pinned || !root->free_ino_ctl) { |
| 1540 | ret = -ENOMEM; |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 1541 | goto fail; |
David Sterba | 35a30d7 | 2011-06-13 15:18:23 +0000 | [diff] [blame] | 1542 | } |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 1543 | |
| 1544 | btrfs_init_free_ino_ctl(root); |
| 1545 | mutex_init(&root->fs_commit_mutex); |
| 1546 | spin_lock_init(&root->cache_lock); |
| 1547 | init_waitqueue_head(&root->cache_wait); |
| 1548 | |
Al Viro | 0ee5dc6 | 2011-07-07 15:44:25 -0400 | [diff] [blame] | 1549 | ret = get_anon_bdev(&root->anon_dev); |
Chris Mason | ac08aed | 2011-06-13 11:28:50 -0400 | [diff] [blame] | 1550 | if (ret) |
| 1551 | goto fail; |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 1552 | |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1553 | if (btrfs_root_refs(&root->root_item) == 0) { |
| 1554 | ret = -ENOENT; |
| 1555 | goto fail; |
| 1556 | } |
| 1557 | |
| 1558 | ret = btrfs_find_orphan_item(fs_info->tree_root, location->objectid); |
| 1559 | if (ret < 0) |
| 1560 | goto fail; |
| 1561 | if (ret == 0) |
| 1562 | root->orphan_item_inserted = 1; |
| 1563 | |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1564 | ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); |
| 1565 | if (ret) |
| 1566 | goto fail; |
| 1567 | |
| 1568 | spin_lock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 1569 | ret = radix_tree_insert(&fs_info->fs_roots_radix, |
| 1570 | (unsigned long)root->root_key.objectid, |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1571 | root); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1572 | if (ret == 0) |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1573 | root->in_radix = 1; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1574 | |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1575 | spin_unlock(&fs_info->fs_roots_radix_lock); |
| 1576 | radix_tree_preload_end(); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1577 | if (ret) { |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1578 | if (ret == -EEXIST) { |
| 1579 | free_fs_root(root); |
| 1580 | goto again; |
| 1581 | } |
| 1582 | goto fail; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1583 | } |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1584 | |
| 1585 | ret = btrfs_find_dead_roots(fs_info->tree_root, |
| 1586 | root->root_key.objectid); |
| 1587 | WARN_ON(ret); |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1588 | return root; |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1589 | fail: |
| 1590 | free_fs_root(root); |
| 1591 | return ERR_PTR(ret); |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1592 | } |
| 1593 | |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1594 | static int btrfs_congested_fn(void *congested_data, int bdi_bits) |
| 1595 | { |
| 1596 | struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; |
| 1597 | int ret = 0; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1598 | struct btrfs_device *device; |
| 1599 | struct backing_dev_info *bdi; |
Chris Mason | b7967db | 2009-04-27 07:29:04 -0400 | [diff] [blame] | 1600 | |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 1601 | rcu_read_lock(); |
| 1602 | list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1603 | if (!device->bdev) |
| 1604 | continue; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1605 | bdi = blk_get_backing_dev_info(device->bdev); |
| 1606 | if (bdi && bdi_congested(bdi, bdi_bits)) { |
| 1607 | ret = 1; |
| 1608 | break; |
| 1609 | } |
| 1610 | } |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 1611 | rcu_read_unlock(); |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1612 | return ret; |
| 1613 | } |
| 1614 | |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1615 | /* |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 1616 | * If this fails, caller must call bdi_destroy() to get rid of the |
| 1617 | * bdi again. |
| 1618 | */ |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1619 | static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) |
| 1620 | { |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 1621 | int err; |
| 1622 | |
| 1623 | bdi->capabilities = BDI_CAP_MAP_COPY; |
Jens Axboe | e6d086d | 2010-04-26 10:27:54 +0200 | [diff] [blame] | 1624 | err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY); |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 1625 | if (err) |
| 1626 | return err; |
| 1627 | |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 1628 | bdi->ra_pages = default_backing_dev_info.ra_pages; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1629 | bdi->congested_fn = btrfs_congested_fn; |
| 1630 | bdi->congested_data = info; |
| 1631 | return 0; |
| 1632 | } |
| 1633 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1634 | /* |
| 1635 | * called by the kthread helper functions to finally call the bio end_io |
| 1636 | * functions. This is where read checksum verification actually happens |
| 1637 | */ |
| 1638 | static void end_workqueue_fn(struct btrfs_work *work) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1639 | { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1640 | struct bio *bio; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1641 | struct end_io_wq *end_io_wq; |
| 1642 | struct btrfs_fs_info *fs_info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1643 | int error; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1644 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1645 | end_io_wq = container_of(work, struct end_io_wq, work); |
| 1646 | bio = end_io_wq->bio; |
| 1647 | fs_info = end_io_wq->info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1648 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1649 | error = end_io_wq->error; |
| 1650 | bio->bi_private = end_io_wq->private; |
| 1651 | bio->bi_end_io = end_io_wq->end_io; |
| 1652 | kfree(end_io_wq); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1653 | bio_endio(bio, error); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 1654 | } |
| 1655 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1656 | static int cleaner_kthread(void *arg) |
| 1657 | { |
| 1658 | struct btrfs_root *root = arg; |
| 1659 | |
| 1660 | do { |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1661 | if (!(root->fs_info->sb->s_flags & MS_RDONLY) && |
| 1662 | mutex_trylock(&root->fs_info->cleaner_mutex)) { |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 1663 | btrfs_run_delayed_iputs(root); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1664 | btrfs_clean_old_snapshots(root); |
| 1665 | mutex_unlock(&root->fs_info->cleaner_mutex); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 1666 | btrfs_run_defrag_inodes(root->fs_info); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1667 | } |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1668 | |
Tejun Heo | a0acae0 | 2011-11-21 12:32:22 -0800 | [diff] [blame] | 1669 | if (!try_to_freeze()) { |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1670 | set_current_state(TASK_INTERRUPTIBLE); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1671 | if (!kthread_should_stop()) |
| 1672 | schedule(); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1673 | __set_current_state(TASK_RUNNING); |
| 1674 | } |
| 1675 | } while (!kthread_should_stop()); |
| 1676 | return 0; |
| 1677 | } |
| 1678 | |
| 1679 | static int transaction_kthread(void *arg) |
| 1680 | { |
| 1681 | struct btrfs_root *root = arg; |
| 1682 | struct btrfs_trans_handle *trans; |
| 1683 | struct btrfs_transaction *cur; |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1684 | u64 transid; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1685 | unsigned long now; |
| 1686 | unsigned long delay; |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1687 | bool cannot_commit; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1688 | |
| 1689 | do { |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1690 | cannot_commit = false; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1691 | delay = HZ * 30; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1692 | mutex_lock(&root->fs_info->transaction_kthread_mutex); |
| 1693 | |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1694 | spin_lock(&root->fs_info->trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1695 | cur = root->fs_info->running_transaction; |
| 1696 | if (!cur) { |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1697 | spin_unlock(&root->fs_info->trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1698 | goto sleep; |
| 1699 | } |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1700 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1701 | now = get_seconds(); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1702 | if (!cur->blocked && |
| 1703 | (now < cur->start_time || now - cur->start_time < 30)) { |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1704 | spin_unlock(&root->fs_info->trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1705 | delay = HZ * 5; |
| 1706 | goto sleep; |
| 1707 | } |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1708 | transid = cur->transid; |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1709 | spin_unlock(&root->fs_info->trans_lock); |
Chris Mason | 56bec29 | 2009-03-13 10:10:06 -0400 | [diff] [blame] | 1710 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 1711 | /* If the file system is aborted, this will always fail. */ |
Miao Xie | 354aa0f | 2012-09-20 01:54:00 -0600 | [diff] [blame] | 1712 | trans = btrfs_attach_transaction(root); |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1713 | if (IS_ERR(trans)) { |
Miao Xie | 354aa0f | 2012-09-20 01:54:00 -0600 | [diff] [blame] | 1714 | if (PTR_ERR(trans) != -ENOENT) |
| 1715 | cannot_commit = true; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 1716 | goto sleep; |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1717 | } |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1718 | if (transid == trans->transid) { |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 1719 | btrfs_commit_transaction(trans, root); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1720 | } else { |
| 1721 | btrfs_end_transaction(trans, root); |
| 1722 | } |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1723 | sleep: |
| 1724 | wake_up_process(root->fs_info->cleaner_kthread); |
| 1725 | mutex_unlock(&root->fs_info->transaction_kthread_mutex); |
| 1726 | |
Tejun Heo | a0acae0 | 2011-11-21 12:32:22 -0800 | [diff] [blame] | 1727 | if (!try_to_freeze()) { |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1728 | set_current_state(TASK_INTERRUPTIBLE); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1729 | if (!kthread_should_stop() && |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1730 | (!btrfs_transaction_blocked(root->fs_info) || |
| 1731 | cannot_commit)) |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1732 | schedule_timeout(delay); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1733 | __set_current_state(TASK_RUNNING); |
| 1734 | } |
| 1735 | } while (!kthread_should_stop()); |
| 1736 | return 0; |
| 1737 | } |
| 1738 | |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1739 | /* |
| 1740 | * this will find the highest generation in the array of |
| 1741 | * root backups. The index of the highest array is returned, |
| 1742 | * or -1 if we can't find anything. |
| 1743 | * |
| 1744 | * We check to make sure the array is valid by comparing the |
| 1745 | * generation of the latest root in the array with the generation |
| 1746 | * in the super block. If they don't match we pitch it. |
| 1747 | */ |
| 1748 | static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) |
| 1749 | { |
| 1750 | u64 cur; |
| 1751 | int newest_index = -1; |
| 1752 | struct btrfs_root_backup *root_backup; |
| 1753 | int i; |
| 1754 | |
| 1755 | for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { |
| 1756 | root_backup = info->super_copy->super_roots + i; |
| 1757 | cur = btrfs_backup_tree_root_gen(root_backup); |
| 1758 | if (cur == newest_gen) |
| 1759 | newest_index = i; |
| 1760 | } |
| 1761 | |
| 1762 | /* check to see if we actually wrapped around */ |
| 1763 | if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { |
| 1764 | root_backup = info->super_copy->super_roots; |
| 1765 | cur = btrfs_backup_tree_root_gen(root_backup); |
| 1766 | if (cur == newest_gen) |
| 1767 | newest_index = 0; |
| 1768 | } |
| 1769 | return newest_index; |
| 1770 | } |
| 1771 | |
| 1772 | |
| 1773 | /* |
| 1774 | * find the oldest backup so we know where to store new entries |
| 1775 | * in the backup array. This will set the backup_root_index |
| 1776 | * field in the fs_info struct |
| 1777 | */ |
| 1778 | static void find_oldest_super_backup(struct btrfs_fs_info *info, |
| 1779 | u64 newest_gen) |
| 1780 | { |
| 1781 | int newest_index = -1; |
| 1782 | |
| 1783 | newest_index = find_newest_super_backup(info, newest_gen); |
| 1784 | /* if there was garbage in there, just move along */ |
| 1785 | if (newest_index == -1) { |
| 1786 | info->backup_root_index = 0; |
| 1787 | } else { |
| 1788 | info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; |
| 1789 | } |
| 1790 | } |
| 1791 | |
| 1792 | /* |
| 1793 | * copy all the root pointers into the super backup array. |
| 1794 | * this will bump the backup pointer by one when it is |
| 1795 | * done |
| 1796 | */ |
| 1797 | static void backup_super_roots(struct btrfs_fs_info *info) |
| 1798 | { |
| 1799 | int next_backup; |
| 1800 | struct btrfs_root_backup *root_backup; |
| 1801 | int last_backup; |
| 1802 | |
| 1803 | next_backup = info->backup_root_index; |
| 1804 | last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % |
| 1805 | BTRFS_NUM_BACKUP_ROOTS; |
| 1806 | |
| 1807 | /* |
| 1808 | * just overwrite the last backup if we're at the same generation |
| 1809 | * this happens only at umount |
| 1810 | */ |
| 1811 | root_backup = info->super_for_commit->super_roots + last_backup; |
| 1812 | if (btrfs_backup_tree_root_gen(root_backup) == |
| 1813 | btrfs_header_generation(info->tree_root->node)) |
| 1814 | next_backup = last_backup; |
| 1815 | |
| 1816 | root_backup = info->super_for_commit->super_roots + next_backup; |
| 1817 | |
| 1818 | /* |
| 1819 | * make sure all of our padding and empty slots get zero filled |
| 1820 | * regardless of which ones we use today |
| 1821 | */ |
| 1822 | memset(root_backup, 0, sizeof(*root_backup)); |
| 1823 | |
| 1824 | info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; |
| 1825 | |
| 1826 | btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); |
| 1827 | btrfs_set_backup_tree_root_gen(root_backup, |
| 1828 | btrfs_header_generation(info->tree_root->node)); |
| 1829 | |
| 1830 | btrfs_set_backup_tree_root_level(root_backup, |
| 1831 | btrfs_header_level(info->tree_root->node)); |
| 1832 | |
| 1833 | btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); |
| 1834 | btrfs_set_backup_chunk_root_gen(root_backup, |
| 1835 | btrfs_header_generation(info->chunk_root->node)); |
| 1836 | btrfs_set_backup_chunk_root_level(root_backup, |
| 1837 | btrfs_header_level(info->chunk_root->node)); |
| 1838 | |
| 1839 | btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); |
| 1840 | btrfs_set_backup_extent_root_gen(root_backup, |
| 1841 | btrfs_header_generation(info->extent_root->node)); |
| 1842 | btrfs_set_backup_extent_root_level(root_backup, |
| 1843 | btrfs_header_level(info->extent_root->node)); |
| 1844 | |
Chris Mason | 7c7e82a | 2011-11-06 18:50:56 -0500 | [diff] [blame] | 1845 | /* |
| 1846 | * we might commit during log recovery, which happens before we set |
| 1847 | * the fs_root. Make sure it is valid before we fill it in. |
| 1848 | */ |
| 1849 | if (info->fs_root && info->fs_root->node) { |
| 1850 | btrfs_set_backup_fs_root(root_backup, |
| 1851 | info->fs_root->node->start); |
| 1852 | btrfs_set_backup_fs_root_gen(root_backup, |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1853 | btrfs_header_generation(info->fs_root->node)); |
Chris Mason | 7c7e82a | 2011-11-06 18:50:56 -0500 | [diff] [blame] | 1854 | btrfs_set_backup_fs_root_level(root_backup, |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1855 | btrfs_header_level(info->fs_root->node)); |
Chris Mason | 7c7e82a | 2011-11-06 18:50:56 -0500 | [diff] [blame] | 1856 | } |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1857 | |
| 1858 | btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); |
| 1859 | btrfs_set_backup_dev_root_gen(root_backup, |
| 1860 | btrfs_header_generation(info->dev_root->node)); |
| 1861 | btrfs_set_backup_dev_root_level(root_backup, |
| 1862 | btrfs_header_level(info->dev_root->node)); |
| 1863 | |
| 1864 | btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); |
| 1865 | btrfs_set_backup_csum_root_gen(root_backup, |
| 1866 | btrfs_header_generation(info->csum_root->node)); |
| 1867 | btrfs_set_backup_csum_root_level(root_backup, |
| 1868 | btrfs_header_level(info->csum_root->node)); |
| 1869 | |
| 1870 | btrfs_set_backup_total_bytes(root_backup, |
| 1871 | btrfs_super_total_bytes(info->super_copy)); |
| 1872 | btrfs_set_backup_bytes_used(root_backup, |
| 1873 | btrfs_super_bytes_used(info->super_copy)); |
| 1874 | btrfs_set_backup_num_devices(root_backup, |
| 1875 | btrfs_super_num_devices(info->super_copy)); |
| 1876 | |
| 1877 | /* |
| 1878 | * if we don't copy this out to the super_copy, it won't get remembered |
| 1879 | * for the next commit |
| 1880 | */ |
| 1881 | memcpy(&info->super_copy->super_roots, |
| 1882 | &info->super_for_commit->super_roots, |
| 1883 | sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); |
| 1884 | } |
| 1885 | |
| 1886 | /* |
| 1887 | * this copies info out of the root backup array and back into |
| 1888 | * the in-memory super block. It is meant to help iterate through |
| 1889 | * the array, so you send it the number of backups you've already |
| 1890 | * tried and the last backup index you used. |
| 1891 | * |
| 1892 | * this returns -1 when it has tried all the backups |
| 1893 | */ |
| 1894 | static noinline int next_root_backup(struct btrfs_fs_info *info, |
| 1895 | struct btrfs_super_block *super, |
| 1896 | int *num_backups_tried, int *backup_index) |
| 1897 | { |
| 1898 | struct btrfs_root_backup *root_backup; |
| 1899 | int newest = *backup_index; |
| 1900 | |
| 1901 | if (*num_backups_tried == 0) { |
| 1902 | u64 gen = btrfs_super_generation(super); |
| 1903 | |
| 1904 | newest = find_newest_super_backup(info, gen); |
| 1905 | if (newest == -1) |
| 1906 | return -1; |
| 1907 | |
| 1908 | *backup_index = newest; |
| 1909 | *num_backups_tried = 1; |
| 1910 | } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { |
| 1911 | /* we've tried all the backups, all done */ |
| 1912 | return -1; |
| 1913 | } else { |
| 1914 | /* jump to the next oldest backup */ |
| 1915 | newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % |
| 1916 | BTRFS_NUM_BACKUP_ROOTS; |
| 1917 | *backup_index = newest; |
| 1918 | *num_backups_tried += 1; |
| 1919 | } |
| 1920 | root_backup = super->super_roots + newest; |
| 1921 | |
| 1922 | btrfs_set_super_generation(super, |
| 1923 | btrfs_backup_tree_root_gen(root_backup)); |
| 1924 | btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); |
| 1925 | btrfs_set_super_root_level(super, |
| 1926 | btrfs_backup_tree_root_level(root_backup)); |
| 1927 | btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); |
| 1928 | |
| 1929 | /* |
| 1930 | * fixme: the total bytes and num_devices need to match or we should |
| 1931 | * need a fsck |
| 1932 | */ |
| 1933 | btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); |
| 1934 | btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); |
| 1935 | return 0; |
| 1936 | } |
| 1937 | |
| 1938 | /* helper to cleanup tree roots */ |
| 1939 | static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) |
| 1940 | { |
| 1941 | free_extent_buffer(info->tree_root->node); |
| 1942 | free_extent_buffer(info->tree_root->commit_root); |
| 1943 | free_extent_buffer(info->dev_root->node); |
| 1944 | free_extent_buffer(info->dev_root->commit_root); |
| 1945 | free_extent_buffer(info->extent_root->node); |
| 1946 | free_extent_buffer(info->extent_root->commit_root); |
| 1947 | free_extent_buffer(info->csum_root->node); |
| 1948 | free_extent_buffer(info->csum_root->commit_root); |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 1949 | if (info->quota_root) { |
| 1950 | free_extent_buffer(info->quota_root->node); |
| 1951 | free_extent_buffer(info->quota_root->commit_root); |
| 1952 | } |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1953 | |
| 1954 | info->tree_root->node = NULL; |
| 1955 | info->tree_root->commit_root = NULL; |
| 1956 | info->dev_root->node = NULL; |
| 1957 | info->dev_root->commit_root = NULL; |
| 1958 | info->extent_root->node = NULL; |
| 1959 | info->extent_root->commit_root = NULL; |
| 1960 | info->csum_root->node = NULL; |
| 1961 | info->csum_root->commit_root = NULL; |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 1962 | if (info->quota_root) { |
| 1963 | info->quota_root->node = NULL; |
| 1964 | info->quota_root->commit_root = NULL; |
| 1965 | } |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1966 | |
| 1967 | if (chunk_root) { |
| 1968 | free_extent_buffer(info->chunk_root->node); |
| 1969 | free_extent_buffer(info->chunk_root->commit_root); |
| 1970 | info->chunk_root->node = NULL; |
| 1971 | info->chunk_root->commit_root = NULL; |
| 1972 | } |
| 1973 | } |
| 1974 | |
| 1975 | |
Al Viro | ad2b2c8 | 2011-11-17 01:10:02 -0500 | [diff] [blame] | 1976 | int open_ctree(struct super_block *sb, |
| 1977 | struct btrfs_fs_devices *fs_devices, |
| 1978 | char *options) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1979 | { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1980 | u32 sectorsize; |
| 1981 | u32 nodesize; |
| 1982 | u32 leafsize; |
| 1983 | u32 blocksize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1984 | u32 stripesize; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1985 | u64 generation; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1986 | u64 features; |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 1987 | struct btrfs_key location; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1988 | struct buffer_head *bh; |
Ilya Dryomov | 4d34b27 | 2011-11-09 00:08:15 +0200 | [diff] [blame] | 1989 | struct btrfs_super_block *disk_super; |
Al Viro | 815745c | 2011-11-17 15:40:49 -0500 | [diff] [blame] | 1990 | struct btrfs_fs_info *fs_info = btrfs_sb(sb); |
Al Viro | f84a8bd | 2011-11-17 15:57:57 -0500 | [diff] [blame] | 1991 | struct btrfs_root *tree_root; |
Ilya Dryomov | 4d34b27 | 2011-11-09 00:08:15 +0200 | [diff] [blame] | 1992 | struct btrfs_root *extent_root; |
| 1993 | struct btrfs_root *csum_root; |
| 1994 | struct btrfs_root *chunk_root; |
| 1995 | struct btrfs_root *dev_root; |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 1996 | struct btrfs_root *quota_root; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1997 | struct btrfs_root *log_tree_root; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1998 | int ret; |
Yan | e58ca02 | 2008-04-01 11:21:34 -0400 | [diff] [blame] | 1999 | int err = -EINVAL; |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2000 | int num_backups_tried = 0; |
| 2001 | int backup_index = 0; |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 2002 | |
Al Viro | f84a8bd | 2011-11-17 15:57:57 -0500 | [diff] [blame] | 2003 | tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info); |
Al Viro | 6f07e42 | 2011-11-17 00:46:16 -0500 | [diff] [blame] | 2004 | extent_root = fs_info->extent_root = btrfs_alloc_root(fs_info); |
| 2005 | csum_root = fs_info->csum_root = btrfs_alloc_root(fs_info); |
| 2006 | chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info); |
| 2007 | dev_root = fs_info->dev_root = btrfs_alloc_root(fs_info); |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2008 | quota_root = fs_info->quota_root = btrfs_alloc_root(fs_info); |
Chris Mason | 8790d50 | 2008-04-03 16:29:03 -0400 | [diff] [blame] | 2009 | |
Al Viro | f84a8bd | 2011-11-17 15:57:57 -0500 | [diff] [blame] | 2010 | if (!tree_root || !extent_root || !csum_root || |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2011 | !chunk_root || !dev_root || !quota_root) { |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2012 | err = -ENOMEM; |
| 2013 | goto fail; |
| 2014 | } |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2015 | |
| 2016 | ret = init_srcu_struct(&fs_info->subvol_srcu); |
| 2017 | if (ret) { |
| 2018 | err = ret; |
| 2019 | goto fail; |
| 2020 | } |
| 2021 | |
| 2022 | ret = setup_bdi(fs_info, &fs_info->bdi); |
| 2023 | if (ret) { |
| 2024 | err = ret; |
| 2025 | goto fail_srcu; |
| 2026 | } |
| 2027 | |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 2028 | ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0); |
| 2029 | if (ret) { |
| 2030 | err = ret; |
| 2031 | goto fail_bdi; |
| 2032 | } |
| 2033 | fs_info->dirty_metadata_batch = PAGE_CACHE_SIZE * |
| 2034 | (1 + ilog2(nr_cpu_ids)); |
| 2035 | |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 2036 | ret = percpu_counter_init(&fs_info->delalloc_bytes, 0); |
| 2037 | if (ret) { |
| 2038 | err = ret; |
| 2039 | goto fail_dirty_metadata_bytes; |
| 2040 | } |
| 2041 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2042 | fs_info->btree_inode = new_inode(sb); |
| 2043 | if (!fs_info->btree_inode) { |
| 2044 | err = -ENOMEM; |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 2045 | goto fail_delalloc_bytes; |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2046 | } |
| 2047 | |
Chris Mason | a659171 | 2011-07-19 12:04:14 -0400 | [diff] [blame] | 2048 | mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); |
Miao Xie | 1561ded | 2011-03-27 16:07:36 +0800 | [diff] [blame] | 2049 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2050 | INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); |
Chris Mason | 8fd1779 | 2007-04-19 21:01:03 -0400 | [diff] [blame] | 2051 | INIT_LIST_HEAD(&fs_info->trans_list); |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 2052 | INIT_LIST_HEAD(&fs_info->dead_roots); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 2053 | INIT_LIST_HEAD(&fs_info->delayed_iputs); |
Chris Mason | ea8c281 | 2008-08-04 23:17:27 -0400 | [diff] [blame] | 2054 | INIT_LIST_HEAD(&fs_info->delalloc_inodes); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2055 | INIT_LIST_HEAD(&fs_info->caching_block_groups); |
Chris Mason | 1832a6d | 2007-12-21 16:27:21 -0500 | [diff] [blame] | 2056 | spin_lock_init(&fs_info->delalloc_lock); |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 2057 | spin_lock_init(&fs_info->trans_lock); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2058 | spin_lock_init(&fs_info->fs_roots_radix_lock); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 2059 | spin_lock_init(&fs_info->delayed_iput_lock); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 2060 | spin_lock_init(&fs_info->defrag_inodes_lock); |
Josef Bacik | 2bf6475 | 2011-09-26 17:12:22 -0400 | [diff] [blame] | 2061 | spin_lock_init(&fs_info->free_chunk_lock); |
Jan Schmidt | f29021b | 2012-05-16 17:55:38 +0200 | [diff] [blame] | 2062 | spin_lock_init(&fs_info->tree_mod_seq_lock); |
| 2063 | rwlock_init(&fs_info->tree_mod_log_lock); |
Chris Mason | 7585717 | 2011-06-13 20:00:16 -0400 | [diff] [blame] | 2064 | mutex_init(&fs_info->reloc_mutex); |
Miao Xie | de98ced | 2013-01-29 10:13:12 +0000 | [diff] [blame] | 2065 | seqlock_init(&fs_info->profiles_lock); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 2066 | |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 2067 | init_completion(&fs_info->kobj_unregister); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2068 | INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 2069 | INIT_LIST_HEAD(&fs_info->space_info); |
Jan Schmidt | f29021b | 2012-05-16 17:55:38 +0200 | [diff] [blame] | 2070 | INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2071 | btrfs_mapping_init(&fs_info->mapping_tree); |
Miao Xie | 66d8f3d | 2012-09-06 04:02:28 -0600 | [diff] [blame] | 2072 | btrfs_init_block_rsv(&fs_info->global_block_rsv, |
| 2073 | BTRFS_BLOCK_RSV_GLOBAL); |
| 2074 | btrfs_init_block_rsv(&fs_info->delalloc_block_rsv, |
| 2075 | BTRFS_BLOCK_RSV_DELALLOC); |
| 2076 | btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); |
| 2077 | btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); |
| 2078 | btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); |
| 2079 | btrfs_init_block_rsv(&fs_info->delayed_block_rsv, |
| 2080 | BTRFS_BLOCK_RSV_DELOPS); |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 2081 | atomic_set(&fs_info->nr_async_submits, 0); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2082 | atomic_set(&fs_info->async_delalloc_pages, 0); |
Chris Mason | 8c8bee1 | 2008-09-29 11:19:10 -0400 | [diff] [blame] | 2083 | atomic_set(&fs_info->async_submit_draining, 0); |
Chris Mason | 0986fe9e | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 2084 | atomic_set(&fs_info->nr_async_bios, 0); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 2085 | atomic_set(&fs_info->defrag_running, 0); |
Jan Schmidt | f29021b | 2012-05-16 17:55:38 +0200 | [diff] [blame] | 2086 | atomic_set(&fs_info->tree_mod_seq, 0); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 2087 | fs_info->sb = sb; |
Chris Mason | 6f568d3 | 2008-01-29 16:03:38 -0500 | [diff] [blame] | 2088 | fs_info->max_inline = 8192 * 1024; |
Josef Bacik | 9ed74f2 | 2009-09-11 16:12:44 -0400 | [diff] [blame] | 2089 | fs_info->metadata_ratio = 0; |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 2090 | fs_info->defrag_inodes = RB_ROOT; |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 2091 | fs_info->trans_no_join = 0; |
Josef Bacik | 2bf6475 | 2011-09-26 17:12:22 -0400 | [diff] [blame] | 2092 | fs_info->free_chunk_space = 0; |
Jan Schmidt | f29021b | 2012-05-16 17:55:38 +0200 | [diff] [blame] | 2093 | fs_info->tree_mod_log = RB_ROOT; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 2094 | |
Arne Jansen | 90519d6 | 2011-05-23 14:30:00 +0200 | [diff] [blame] | 2095 | /* readahead state */ |
| 2096 | INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT); |
| 2097 | spin_lock_init(&fs_info->reada_lock); |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 2098 | |
Chris Mason | b34b086 | 2008-12-19 15:43:22 -0500 | [diff] [blame] | 2099 | fs_info->thread_pool_size = min_t(unsigned long, |
| 2100 | num_online_cpus() + 2, 8); |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 2101 | |
Chris Mason | 3eaa288 | 2008-07-24 11:57:52 -0400 | [diff] [blame] | 2102 | INIT_LIST_HEAD(&fs_info->ordered_extents); |
| 2103 | spin_lock_init(&fs_info->ordered_extent_lock); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2104 | fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), |
| 2105 | GFP_NOFS); |
| 2106 | if (!fs_info->delayed_root) { |
| 2107 | err = -ENOMEM; |
| 2108 | goto fail_iput; |
| 2109 | } |
| 2110 | btrfs_init_delayed_root(fs_info->delayed_root); |
Chris Mason | 3eaa288 | 2008-07-24 11:57:52 -0400 | [diff] [blame] | 2111 | |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 2112 | mutex_init(&fs_info->scrub_lock); |
| 2113 | atomic_set(&fs_info->scrubs_running, 0); |
| 2114 | atomic_set(&fs_info->scrub_pause_req, 0); |
| 2115 | atomic_set(&fs_info->scrubs_paused, 0); |
| 2116 | atomic_set(&fs_info->scrub_cancel_req, 0); |
| 2117 | init_waitqueue_head(&fs_info->scrub_pause_wait); |
| 2118 | init_rwsem(&fs_info->scrub_super_lock); |
| 2119 | fs_info->scrub_workers_refcnt = 0; |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 2120 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
| 2121 | fs_info->check_integrity_print_mask = 0; |
| 2122 | #endif |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 2123 | |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 2124 | spin_lock_init(&fs_info->balance_lock); |
| 2125 | mutex_init(&fs_info->balance_mutex); |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 2126 | atomic_set(&fs_info->balance_running, 0); |
| 2127 | atomic_set(&fs_info->balance_pause_req, 0); |
Ilya Dryomov | a7e99c6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 2128 | atomic_set(&fs_info->balance_cancel_req, 0); |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 2129 | fs_info->balance_ctl = NULL; |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 2130 | init_waitqueue_head(&fs_info->balance_wait_q); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2131 | |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 2132 | sb->s_blocksize = 4096; |
| 2133 | sb->s_blocksize_bits = blksize_bits(4096); |
Jens Axboe | 32a88aa | 2009-09-16 15:02:33 +0200 | [diff] [blame] | 2134 | sb->s_bdi = &fs_info->bdi; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 2135 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2136 | fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 2137 | set_nlink(fs_info->btree_inode, 1); |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 2138 | /* |
| 2139 | * we set the i_size on the btree inode to the max possible int. |
| 2140 | * the real end of the address space is determined by all of |
| 2141 | * the devices in the system |
| 2142 | */ |
| 2143 | fs_info->btree_inode->i_size = OFFSET_MAX; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 2144 | fs_info->btree_inode->i_mapping->a_ops = &btree_aops; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 2145 | fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; |
| 2146 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2147 | RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 2148 | extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, |
David Sterba | f993c88 | 2011-04-20 23:35:57 +0200 | [diff] [blame] | 2149 | fs_info->btree_inode->i_mapping); |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 2150 | BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; |
David Sterba | a8067e0 | 2011-04-21 00:34:43 +0200 | [diff] [blame] | 2151 | extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 2152 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 2153 | BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; |
| 2154 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2155 | BTRFS_I(fs_info->btree_inode)->root = tree_root; |
| 2156 | memset(&BTRFS_I(fs_info->btree_inode)->location, 0, |
| 2157 | sizeof(struct btrfs_key)); |
Josef Bacik | 72ac3c0 | 2012-05-23 14:13:11 -0400 | [diff] [blame] | 2158 | set_bit(BTRFS_INODE_DUMMY, |
| 2159 | &BTRFS_I(fs_info->btree_inode)->runtime_flags); |
Chris Mason | 22b0ebd | 2007-03-30 08:47:31 -0400 | [diff] [blame] | 2160 | insert_inode_hash(fs_info->btree_inode); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2161 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2162 | spin_lock_init(&fs_info->block_group_cache_lock); |
Eric Paris | 6bef4d3 | 2010-02-23 19:43:04 +0000 | [diff] [blame] | 2163 | fs_info->block_group_cache_tree = RB_ROOT; |
Liu Bo | a1897fd | 2012-12-27 09:01:23 +0000 | [diff] [blame] | 2164 | fs_info->first_logical_byte = (u64)-1; |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2165 | |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2166 | extent_io_tree_init(&fs_info->freed_extents[0], |
David Sterba | f993c88 | 2011-04-20 23:35:57 +0200 | [diff] [blame] | 2167 | fs_info->btree_inode->i_mapping); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2168 | extent_io_tree_init(&fs_info->freed_extents[1], |
David Sterba | f993c88 | 2011-04-20 23:35:57 +0200 | [diff] [blame] | 2169 | fs_info->btree_inode->i_mapping); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2170 | fs_info->pinned_extents = &fs_info->freed_extents[0]; |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 2171 | fs_info->do_barriers = 1; |
Chris Mason | f929574 | 2008-07-17 12:54:14 -0400 | [diff] [blame] | 2172 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 2173 | |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 2174 | mutex_init(&fs_info->ordered_operations_mutex); |
Chris Mason | 30ae846 | 2007-03-29 09:59:15 -0400 | [diff] [blame] | 2175 | mutex_init(&fs_info->tree_log_mutex); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2176 | mutex_init(&fs_info->chunk_mutex); |
| 2177 | mutex_init(&fs_info->transaction_kthread_mutex); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2178 | mutex_init(&fs_info->cleaner_mutex); |
| 2179 | mutex_init(&fs_info->volume_mutex); |
Yan Zheng | 276e680 | 2009-07-30 09:40:40 -0400 | [diff] [blame] | 2180 | init_rwsem(&fs_info->extent_commit_sem); |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 2181 | init_rwsem(&fs_info->cleanup_work_sem); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2182 | init_rwsem(&fs_info->subvol_sem); |
Stefan Behrens | e922e08 | 2012-11-05 17:26:40 +0100 | [diff] [blame] | 2183 | fs_info->dev_replace.lock_owner = 0; |
| 2184 | atomic_set(&fs_info->dev_replace.nesting_level, 0); |
| 2185 | mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); |
| 2186 | mutex_init(&fs_info->dev_replace.lock_management_lock); |
| 2187 | mutex_init(&fs_info->dev_replace.lock); |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 2188 | |
Arne Jansen | 416ac51 | 2011-09-13 12:56:09 +0200 | [diff] [blame] | 2189 | spin_lock_init(&fs_info->qgroup_lock); |
| 2190 | fs_info->qgroup_tree = RB_ROOT; |
| 2191 | INIT_LIST_HEAD(&fs_info->dirty_qgroups); |
| 2192 | fs_info->qgroup_seq = 1; |
| 2193 | fs_info->quota_enabled = 0; |
| 2194 | fs_info->pending_quota_state = 0; |
| 2195 | |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 2196 | btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); |
| 2197 | btrfs_init_free_cluster(&fs_info->data_alloc_cluster); |
| 2198 | |
Chris Mason | 7d9eb12 | 2008-07-08 14:19:17 -0400 | [diff] [blame] | 2199 | init_waitqueue_head(&fs_info->transaction_throttle); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 2200 | init_waitqueue_head(&fs_info->transaction_wait); |
Sage Weil | bb9c12c | 2010-10-29 15:37:34 -0400 | [diff] [blame] | 2201 | init_waitqueue_head(&fs_info->transaction_blocked_wait); |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 2202 | init_waitqueue_head(&fs_info->async_submit_wait); |
Chris Mason | 9a8dd15 | 2007-02-23 08:38:36 -0500 | [diff] [blame] | 2203 | |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 2204 | ret = btrfs_alloc_stripe_hash_table(fs_info); |
| 2205 | if (ret) { |
David Sterba | 83c8266 | 2013-03-01 15:03:00 +0000 | [diff] [blame] | 2206 | err = ret; |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 2207 | goto fail_alloc; |
| 2208 | } |
| 2209 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2210 | __setup_root(4096, 4096, 4096, 4096, tree_root, |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 2211 | fs_info, BTRFS_ROOT_TREE_OBJECTID); |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 2212 | |
Chris Mason | 3c4bb26 | 2012-03-27 18:56:56 -0400 | [diff] [blame] | 2213 | invalidate_bdev(fs_devices->latest_bdev); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2214 | bh = btrfs_read_dev_super(fs_devices->latest_bdev); |
Dave Young | 20b4507 | 2011-01-08 10:09:13 +0000 | [diff] [blame] | 2215 | if (!bh) { |
| 2216 | err = -EINVAL; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2217 | goto fail_alloc; |
Dave Young | 20b4507 | 2011-01-08 10:09:13 +0000 | [diff] [blame] | 2218 | } |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2219 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2220 | memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); |
| 2221 | memcpy(fs_info->super_for_commit, fs_info->super_copy, |
| 2222 | sizeof(*fs_info->super_for_commit)); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2223 | brelse(bh); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2224 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2225 | memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2226 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2227 | disk_super = fs_info->super_copy; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2228 | if (!btrfs_super_root(disk_super)) |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2229 | goto fail_alloc; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2230 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2231 | /* check FS state, whether FS is broken. */ |
Miao Xie | 87533c4 | 2013-01-29 10:14:48 +0000 | [diff] [blame] | 2232 | if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) |
| 2233 | set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2234 | |
David Sterba | fcd1f065 | 2012-03-06 00:06:18 +0100 | [diff] [blame] | 2235 | ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); |
| 2236 | if (ret) { |
| 2237 | printk(KERN_ERR "btrfs: superblock contains fatal errors\n"); |
| 2238 | err = ret; |
| 2239 | goto fail_alloc; |
| 2240 | } |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2241 | |
Liu Bo | 75e7cb7 | 2011-03-22 10:12:20 +0000 | [diff] [blame] | 2242 | /* |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2243 | * run through our array of backup supers and setup |
| 2244 | * our ring pointer to the oldest one |
| 2245 | */ |
| 2246 | generation = btrfs_super_generation(disk_super); |
| 2247 | find_oldest_super_backup(fs_info, generation); |
| 2248 | |
| 2249 | /* |
Liu Bo | 75e7cb7 | 2011-03-22 10:12:20 +0000 | [diff] [blame] | 2250 | * In the long term, we'll store the compression type in the super |
| 2251 | * block, and it'll be used for per file compression control. |
| 2252 | */ |
| 2253 | fs_info->compress_type = BTRFS_COMPRESS_ZLIB; |
| 2254 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2255 | ret = btrfs_parse_options(tree_root, options); |
| 2256 | if (ret) { |
| 2257 | err = ret; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2258 | goto fail_alloc; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2259 | } |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2260 | |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2261 | features = btrfs_super_incompat_flags(disk_super) & |
| 2262 | ~BTRFS_FEATURE_INCOMPAT_SUPP; |
| 2263 | if (features) { |
| 2264 | printk(KERN_ERR "BTRFS: couldn't mount because of " |
| 2265 | "unsupported optional features (%Lx).\n", |
Joel Becker | 2138093 | 2009-04-21 12:38:29 -0700 | [diff] [blame] | 2266 | (unsigned long long)features); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2267 | err = -EINVAL; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2268 | goto fail_alloc; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2269 | } |
| 2270 | |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 2271 | if (btrfs_super_leafsize(disk_super) != |
| 2272 | btrfs_super_nodesize(disk_super)) { |
| 2273 | printk(KERN_ERR "BTRFS: couldn't mount because metadata " |
| 2274 | "blocksizes don't match. node %d leaf %d\n", |
| 2275 | btrfs_super_nodesize(disk_super), |
| 2276 | btrfs_super_leafsize(disk_super)); |
| 2277 | err = -EINVAL; |
| 2278 | goto fail_alloc; |
| 2279 | } |
| 2280 | if (btrfs_super_leafsize(disk_super) > BTRFS_MAX_METADATA_BLOCKSIZE) { |
| 2281 | printk(KERN_ERR "BTRFS: couldn't mount because metadata " |
| 2282 | "blocksize (%d) was too large\n", |
| 2283 | btrfs_super_leafsize(disk_super)); |
| 2284 | err = -EINVAL; |
| 2285 | goto fail_alloc; |
| 2286 | } |
| 2287 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2288 | features = btrfs_super_incompat_flags(disk_super); |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 2289 | features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; |
Li Zefan | 69e380d | 2012-06-11 17:10:51 +0800 | [diff] [blame] | 2290 | if (tree_root->fs_info->compress_type == BTRFS_COMPRESS_LZO) |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 2291 | features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 2292 | |
| 2293 | /* |
| 2294 | * flag our filesystem as having big metadata blocks if |
| 2295 | * they are bigger than the page size |
| 2296 | */ |
| 2297 | if (btrfs_super_leafsize(disk_super) > PAGE_CACHE_SIZE) { |
| 2298 | if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) |
| 2299 | printk(KERN_INFO "btrfs flagging fs with big metadata feature\n"); |
| 2300 | features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; |
| 2301 | } |
| 2302 | |
Chris Mason | bc3f116 | 2012-03-29 17:02:47 -0400 | [diff] [blame] | 2303 | nodesize = btrfs_super_nodesize(disk_super); |
| 2304 | leafsize = btrfs_super_leafsize(disk_super); |
| 2305 | sectorsize = btrfs_super_sectorsize(disk_super); |
| 2306 | stripesize = btrfs_super_stripesize(disk_super); |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 2307 | fs_info->dirty_metadata_batch = leafsize * (1 + ilog2(nr_cpu_ids)); |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 2308 | fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); |
Chris Mason | bc3f116 | 2012-03-29 17:02:47 -0400 | [diff] [blame] | 2309 | |
| 2310 | /* |
| 2311 | * mixed block groups end up with duplicate but slightly offset |
| 2312 | * extent buffers for the same range. It leads to corruptions |
| 2313 | */ |
| 2314 | if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && |
| 2315 | (sectorsize != leafsize)) { |
| 2316 | printk(KERN_WARNING "btrfs: unequal leaf/node/sector sizes " |
| 2317 | "are not allowed for mixed block groups on %s\n", |
| 2318 | sb->s_id); |
| 2319 | goto fail_alloc; |
| 2320 | } |
| 2321 | |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 2322 | btrfs_set_super_incompat_flags(disk_super, features); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2323 | |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2324 | features = btrfs_super_compat_ro_flags(disk_super) & |
| 2325 | ~BTRFS_FEATURE_COMPAT_RO_SUPP; |
| 2326 | if (!(sb->s_flags & MS_RDONLY) && features) { |
| 2327 | printk(KERN_ERR "BTRFS: couldn't mount RDWR because of " |
| 2328 | "unsupported option features (%Lx).\n", |
Joel Becker | 2138093 | 2009-04-21 12:38:29 -0700 | [diff] [blame] | 2329 | (unsigned long long)features); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2330 | err = -EINVAL; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2331 | goto fail_alloc; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2332 | } |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2333 | |
| 2334 | btrfs_init_workers(&fs_info->generic_worker, |
| 2335 | "genwork", 1, NULL); |
| 2336 | |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 2337 | btrfs_init_workers(&fs_info->workers, "worker", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2338 | fs_info->thread_pool_size, |
| 2339 | &fs_info->generic_worker); |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 2340 | |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2341 | btrfs_init_workers(&fs_info->delalloc_workers, "delalloc", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2342 | fs_info->thread_pool_size, |
| 2343 | &fs_info->generic_worker); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2344 | |
Miao Xie | 8ccf6f19 | 2012-10-25 09:28:04 +0000 | [diff] [blame] | 2345 | btrfs_init_workers(&fs_info->flush_workers, "flush_delalloc", |
| 2346 | fs_info->thread_pool_size, |
| 2347 | &fs_info->generic_worker); |
| 2348 | |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 2349 | btrfs_init_workers(&fs_info->submit_workers, "submit", |
Chris Mason | b720d20 | 2008-08-15 15:34:14 -0400 | [diff] [blame] | 2350 | min_t(u64, fs_devices->num_devices, |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2351 | fs_info->thread_pool_size), |
| 2352 | &fs_info->generic_worker); |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 2353 | |
Josef Bacik | bab39bf | 2011-06-30 14:42:28 -0400 | [diff] [blame] | 2354 | btrfs_init_workers(&fs_info->caching_workers, "cache", |
| 2355 | 2, &fs_info->generic_worker); |
| 2356 | |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 2357 | /* a higher idle thresh on the submit workers makes it much more |
| 2358 | * likely that bios will be send down in a sane order to the |
| 2359 | * devices |
| 2360 | */ |
| 2361 | fs_info->submit_workers.idle_thresh = 64; |
Chris Mason | 5386323 | 2008-08-15 15:34:18 -0400 | [diff] [blame] | 2362 | |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2363 | fs_info->workers.idle_thresh = 16; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 2364 | fs_info->workers.ordered = 1; |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 2365 | |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2366 | fs_info->delalloc_workers.idle_thresh = 2; |
| 2367 | fs_info->delalloc_workers.ordered = 1; |
| 2368 | |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2369 | btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1, |
| 2370 | &fs_info->generic_worker); |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 2371 | btrfs_init_workers(&fs_info->endio_workers, "endio", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2372 | fs_info->thread_pool_size, |
| 2373 | &fs_info->generic_worker); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2374 | btrfs_init_workers(&fs_info->endio_meta_workers, "endio-meta", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2375 | fs_info->thread_pool_size, |
| 2376 | &fs_info->generic_worker); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 2377 | btrfs_init_workers(&fs_info->endio_meta_write_workers, |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2378 | "endio-meta-write", fs_info->thread_pool_size, |
| 2379 | &fs_info->generic_worker); |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 2380 | btrfs_init_workers(&fs_info->endio_raid56_workers, |
| 2381 | "endio-raid56", fs_info->thread_pool_size, |
| 2382 | &fs_info->generic_worker); |
| 2383 | btrfs_init_workers(&fs_info->rmw_workers, |
| 2384 | "rmw", fs_info->thread_pool_size, |
| 2385 | &fs_info->generic_worker); |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 2386 | btrfs_init_workers(&fs_info->endio_write_workers, "endio-write", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2387 | fs_info->thread_pool_size, |
| 2388 | &fs_info->generic_worker); |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 2389 | btrfs_init_workers(&fs_info->endio_freespace_worker, "freespace-write", |
| 2390 | 1, &fs_info->generic_worker); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2391 | btrfs_init_workers(&fs_info->delayed_workers, "delayed-meta", |
| 2392 | fs_info->thread_pool_size, |
| 2393 | &fs_info->generic_worker); |
Arne Jansen | 90519d6 | 2011-05-23 14:30:00 +0200 | [diff] [blame] | 2394 | btrfs_init_workers(&fs_info->readahead_workers, "readahead", |
| 2395 | fs_info->thread_pool_size, |
| 2396 | &fs_info->generic_worker); |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 2397 | |
| 2398 | /* |
| 2399 | * endios are largely parallel and should have a very |
| 2400 | * low idle thresh |
| 2401 | */ |
| 2402 | fs_info->endio_workers.idle_thresh = 4; |
Chris Mason | b51912c | 2009-02-04 09:23:24 -0500 | [diff] [blame] | 2403 | fs_info->endio_meta_workers.idle_thresh = 4; |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 2404 | fs_info->endio_raid56_workers.idle_thresh = 4; |
| 2405 | fs_info->rmw_workers.idle_thresh = 2; |
Chris Mason | b51912c | 2009-02-04 09:23:24 -0500 | [diff] [blame] | 2406 | |
Chris Mason | 9042846 | 2009-08-04 16:56:34 -0400 | [diff] [blame] | 2407 | fs_info->endio_write_workers.idle_thresh = 2; |
| 2408 | fs_info->endio_meta_write_workers.idle_thresh = 2; |
Arne Jansen | 90519d6 | 2011-05-23 14:30:00 +0200 | [diff] [blame] | 2409 | fs_info->readahead_workers.idle_thresh = 2; |
Chris Mason | 9042846 | 2009-08-04 16:56:34 -0400 | [diff] [blame] | 2410 | |
Josef Bacik | 0dc3b84 | 2011-11-18 14:37:27 -0500 | [diff] [blame] | 2411 | /* |
| 2412 | * btrfs_start_workers can really only fail because of ENOMEM so just |
| 2413 | * return -ENOMEM if any of these fail. |
| 2414 | */ |
| 2415 | ret = btrfs_start_workers(&fs_info->workers); |
| 2416 | ret |= btrfs_start_workers(&fs_info->generic_worker); |
| 2417 | ret |= btrfs_start_workers(&fs_info->submit_workers); |
| 2418 | ret |= btrfs_start_workers(&fs_info->delalloc_workers); |
| 2419 | ret |= btrfs_start_workers(&fs_info->fixup_workers); |
| 2420 | ret |= btrfs_start_workers(&fs_info->endio_workers); |
| 2421 | ret |= btrfs_start_workers(&fs_info->endio_meta_workers); |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 2422 | ret |= btrfs_start_workers(&fs_info->rmw_workers); |
| 2423 | ret |= btrfs_start_workers(&fs_info->endio_raid56_workers); |
Josef Bacik | 0dc3b84 | 2011-11-18 14:37:27 -0500 | [diff] [blame] | 2424 | ret |= btrfs_start_workers(&fs_info->endio_meta_write_workers); |
| 2425 | ret |= btrfs_start_workers(&fs_info->endio_write_workers); |
| 2426 | ret |= btrfs_start_workers(&fs_info->endio_freespace_worker); |
| 2427 | ret |= btrfs_start_workers(&fs_info->delayed_workers); |
| 2428 | ret |= btrfs_start_workers(&fs_info->caching_workers); |
| 2429 | ret |= btrfs_start_workers(&fs_info->readahead_workers); |
Miao Xie | 8ccf6f19 | 2012-10-25 09:28:04 +0000 | [diff] [blame] | 2430 | ret |= btrfs_start_workers(&fs_info->flush_workers); |
Josef Bacik | 0dc3b84 | 2011-11-18 14:37:27 -0500 | [diff] [blame] | 2431 | if (ret) { |
Ilya Dryomov | fed425c | 2012-06-22 12:13:01 -0600 | [diff] [blame] | 2432 | err = -ENOMEM; |
Josef Bacik | 0dc3b84 | 2011-11-18 14:37:27 -0500 | [diff] [blame] | 2433 | goto fail_sb_buffer; |
| 2434 | } |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 2435 | |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 2436 | fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 2437 | fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, |
| 2438 | 4 * 1024 * 1024 / PAGE_CACHE_SIZE); |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 2439 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2440 | tree_root->nodesize = nodesize; |
| 2441 | tree_root->leafsize = leafsize; |
| 2442 | tree_root->sectorsize = sectorsize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 2443 | tree_root->stripesize = stripesize; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2444 | |
| 2445 | sb->s_blocksize = sectorsize; |
| 2446 | sb->s_blocksize_bits = blksize_bits(sectorsize); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2447 | |
Zach Brown | cdb4c57 | 2013-02-20 00:55:13 +0000 | [diff] [blame] | 2448 | if (disk_super->magic != cpu_to_le64(BTRFS_MAGIC)) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2449 | printk(KERN_INFO "btrfs: valid FS not found on %s\n", sb->s_id); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2450 | goto fail_sb_buffer; |
| 2451 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 2452 | |
Liu Bo | 8d082fb | 2012-04-03 09:56:53 +0800 | [diff] [blame] | 2453 | if (sectorsize != PAGE_SIZE) { |
| 2454 | printk(KERN_WARNING "btrfs: Incompatible sector size(%lu) " |
| 2455 | "found on %s\n", (unsigned long)sectorsize, sb->s_id); |
Keith Mannthey | 941b2dd | 2011-11-29 17:44:12 -0800 | [diff] [blame] | 2456 | goto fail_sb_buffer; |
| 2457 | } |
| 2458 | |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2459 | mutex_lock(&fs_info->chunk_mutex); |
Yan Zheng | e4404d6 | 2008-12-12 10:03:26 -0500 | [diff] [blame] | 2460 | ret = btrfs_read_sys_array(tree_root); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2461 | mutex_unlock(&fs_info->chunk_mutex); |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 2462 | if (ret) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2463 | printk(KERN_WARNING "btrfs: failed to read the system " |
| 2464 | "array on %s\n", sb->s_id); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2465 | goto fail_sb_buffer; |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 2466 | } |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2467 | |
| 2468 | blocksize = btrfs_level_size(tree_root, |
| 2469 | btrfs_super_chunk_root_level(disk_super)); |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2470 | generation = btrfs_super_chunk_root_generation(disk_super); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2471 | |
| 2472 | __setup_root(nodesize, leafsize, sectorsize, stripesize, |
| 2473 | chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); |
| 2474 | |
| 2475 | chunk_root->node = read_tree_block(chunk_root, |
| 2476 | btrfs_super_chunk_root(disk_super), |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2477 | blocksize, generation); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2478 | BUG_ON(!chunk_root->node); /* -ENOMEM */ |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 2479 | if (!test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { |
| 2480 | printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n", |
| 2481 | sb->s_id); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2482 | goto fail_tree_roots; |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 2483 | } |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2484 | btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); |
| 2485 | chunk_root->commit_root = btrfs_root_node(chunk_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2486 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 2487 | read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2488 | (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node), |
| 2489 | BTRFS_UUID_SIZE); |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 2490 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2491 | ret = btrfs_read_chunk_tree(chunk_root); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2492 | if (ret) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2493 | printk(KERN_WARNING "btrfs: failed to read chunk tree on %s\n", |
| 2494 | sb->s_id); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2495 | goto fail_tree_roots; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2496 | } |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2497 | |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 2498 | /* |
| 2499 | * keep the device that is marked to be the target device for the |
| 2500 | * dev_replace procedure |
| 2501 | */ |
| 2502 | btrfs_close_extra_devices(fs_info, fs_devices, 0); |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2503 | |
Chris Mason | a6b0d5c | 2012-02-20 20:53:43 -0500 | [diff] [blame] | 2504 | if (!fs_devices->latest_bdev) { |
| 2505 | printk(KERN_CRIT "btrfs: failed to read devices on %s\n", |
| 2506 | sb->s_id); |
| 2507 | goto fail_tree_roots; |
| 2508 | } |
| 2509 | |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2510 | retry_root_backup: |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2511 | blocksize = btrfs_level_size(tree_root, |
| 2512 | btrfs_super_root_level(disk_super)); |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2513 | generation = btrfs_super_generation(disk_super); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2514 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 2515 | tree_root->node = read_tree_block(tree_root, |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2516 | btrfs_super_root(disk_super), |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2517 | blocksize, generation); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2518 | if (!tree_root->node || |
| 2519 | !test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) { |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 2520 | printk(KERN_WARNING "btrfs: failed to read tree root on %s\n", |
| 2521 | sb->s_id); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2522 | |
| 2523 | goto recovery_tree_root; |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 2524 | } |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2525 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2526 | btrfs_set_root_node(&tree_root->root_item, tree_root->node); |
| 2527 | tree_root->commit_root = btrfs_root_node(tree_root); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2528 | |
| 2529 | ret = find_and_setup_root(tree_root, fs_info, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 2530 | BTRFS_EXTENT_TREE_OBJECTID, extent_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2531 | if (ret) |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2532 | goto recovery_tree_root; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2533 | extent_root->track_dirty = 1; |
| 2534 | |
| 2535 | ret = find_and_setup_root(tree_root, fs_info, |
| 2536 | BTRFS_DEV_TREE_OBJECTID, dev_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2537 | if (ret) |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2538 | goto recovery_tree_root; |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2539 | dev_root->track_dirty = 1; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 2540 | |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2541 | ret = find_and_setup_root(tree_root, fs_info, |
| 2542 | BTRFS_CSUM_TREE_OBJECTID, csum_root); |
| 2543 | if (ret) |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2544 | goto recovery_tree_root; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2545 | csum_root->track_dirty = 1; |
| 2546 | |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2547 | ret = find_and_setup_root(tree_root, fs_info, |
| 2548 | BTRFS_QUOTA_TREE_OBJECTID, quota_root); |
| 2549 | if (ret) { |
| 2550 | kfree(quota_root); |
| 2551 | quota_root = fs_info->quota_root = NULL; |
| 2552 | } else { |
| 2553 | quota_root->track_dirty = 1; |
| 2554 | fs_info->quota_enabled = 1; |
| 2555 | fs_info->pending_quota_state = 1; |
| 2556 | } |
| 2557 | |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2558 | fs_info->generation = generation; |
| 2559 | fs_info->last_trans_committed = generation; |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2560 | |
Ilya Dryomov | 68310a5 | 2012-06-22 12:24:12 -0600 | [diff] [blame] | 2561 | ret = btrfs_recover_balance(fs_info); |
| 2562 | if (ret) { |
| 2563 | printk(KERN_WARNING "btrfs: failed to recover balance\n"); |
| 2564 | goto fail_block_groups; |
| 2565 | } |
| 2566 | |
Stefan Behrens | 733f4fb | 2012-05-25 16:06:10 +0200 | [diff] [blame] | 2567 | ret = btrfs_init_dev_stats(fs_info); |
| 2568 | if (ret) { |
| 2569 | printk(KERN_ERR "btrfs: failed to init dev_stats: %d\n", |
| 2570 | ret); |
| 2571 | goto fail_block_groups; |
| 2572 | } |
| 2573 | |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 2574 | ret = btrfs_init_dev_replace(fs_info); |
| 2575 | if (ret) { |
| 2576 | pr_err("btrfs: failed to init dev_replace: %d\n", ret); |
| 2577 | goto fail_block_groups; |
| 2578 | } |
| 2579 | |
| 2580 | btrfs_close_extra_devices(fs_info, fs_devices, 1); |
| 2581 | |
liubo | c59021f | 2011-03-07 02:13:14 +0000 | [diff] [blame] | 2582 | ret = btrfs_init_space_info(fs_info); |
| 2583 | if (ret) { |
| 2584 | printk(KERN_ERR "Failed to initial space info: %d\n", ret); |
| 2585 | goto fail_block_groups; |
| 2586 | } |
| 2587 | |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 2588 | ret = btrfs_read_block_groups(extent_root); |
| 2589 | if (ret) { |
| 2590 | printk(KERN_ERR "Failed to read block groups: %d\n", ret); |
| 2591 | goto fail_block_groups; |
| 2592 | } |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 2593 | fs_info->num_tolerated_disk_barrier_failures = |
| 2594 | btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); |
Stefan Behrens | 292fd7f | 2012-10-30 17:16:16 +0000 | [diff] [blame] | 2595 | if (fs_info->fs_devices->missing_devices > |
| 2596 | fs_info->num_tolerated_disk_barrier_failures && |
| 2597 | !(sb->s_flags & MS_RDONLY)) { |
| 2598 | printk(KERN_WARNING |
| 2599 | "Btrfs: too many missing devices, writeable mount is not allowed\n"); |
| 2600 | goto fail_block_groups; |
| 2601 | } |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 2602 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2603 | fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, |
| 2604 | "btrfs-cleaner"); |
Qinghuang Feng | 57506d5 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2605 | if (IS_ERR(fs_info->cleaner_kthread)) |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 2606 | goto fail_block_groups; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2607 | |
| 2608 | fs_info->transaction_kthread = kthread_run(transaction_kthread, |
| 2609 | tree_root, |
| 2610 | "btrfs-transaction"); |
Qinghuang Feng | 57506d5 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2611 | if (IS_ERR(fs_info->transaction_kthread)) |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2612 | goto fail_cleaner; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2613 | |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 2614 | if (!btrfs_test_opt(tree_root, SSD) && |
| 2615 | !btrfs_test_opt(tree_root, NOSSD) && |
| 2616 | !fs_info->fs_devices->rotating) { |
| 2617 | printk(KERN_INFO "Btrfs detected SSD devices, enabling SSD " |
| 2618 | "mode\n"); |
| 2619 | btrfs_set_opt(fs_info->mount_opt, SSD); |
| 2620 | } |
| 2621 | |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 2622 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
| 2623 | if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { |
| 2624 | ret = btrfsic_mount(tree_root, fs_devices, |
| 2625 | btrfs_test_opt(tree_root, |
| 2626 | CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? |
| 2627 | 1 : 0, |
| 2628 | fs_info->check_integrity_print_mask); |
| 2629 | if (ret) |
| 2630 | printk(KERN_WARNING "btrfs: failed to initialize" |
| 2631 | " integrity check module %s\n", sb->s_id); |
| 2632 | } |
| 2633 | #endif |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2634 | ret = btrfs_read_qgroup_config(fs_info); |
| 2635 | if (ret) |
| 2636 | goto fail_trans_kthread; |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 2637 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2638 | /* do not make disk changes in broken FS */ |
Stefan Behrens | 68ce968 | 2012-08-01 05:45:52 -0600 | [diff] [blame] | 2639 | if (btrfs_super_log_root(disk_super) != 0) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2640 | u64 bytenr = btrfs_super_log_root(disk_super); |
Chris Mason | d18a2c4 | 2008-04-04 15:40:00 -0400 | [diff] [blame] | 2641 | |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2642 | if (fs_devices->rw_devices == 0) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2643 | printk(KERN_WARNING "Btrfs log replay required " |
| 2644 | "on RO media\n"); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2645 | err = -EIO; |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2646 | goto fail_qgroup; |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2647 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2648 | blocksize = |
| 2649 | btrfs_level_size(tree_root, |
| 2650 | btrfs_super_log_root_level(disk_super)); |
| 2651 | |
Al Viro | 6f07e42 | 2011-11-17 00:46:16 -0500 | [diff] [blame] | 2652 | log_tree_root = btrfs_alloc_root(fs_info); |
Dan Carpenter | 676e4c8 | 2010-05-29 09:43:07 +0000 | [diff] [blame] | 2653 | if (!log_tree_root) { |
| 2654 | err = -ENOMEM; |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2655 | goto fail_qgroup; |
Dan Carpenter | 676e4c8 | 2010-05-29 09:43:07 +0000 | [diff] [blame] | 2656 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2657 | |
| 2658 | __setup_root(nodesize, leafsize, sectorsize, stripesize, |
| 2659 | log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); |
| 2660 | |
| 2661 | log_tree_root->node = read_tree_block(tree_root, bytenr, |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2662 | blocksize, |
| 2663 | generation + 1); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2664 | /* returns with log_tree_root freed on success */ |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2665 | ret = btrfs_recover_log_trees(log_tree_root); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2666 | if (ret) { |
| 2667 | btrfs_error(tree_root->fs_info, ret, |
| 2668 | "Failed to recover log tree"); |
| 2669 | free_extent_buffer(log_tree_root->node); |
| 2670 | kfree(log_tree_root); |
| 2671 | goto fail_trans_kthread; |
| 2672 | } |
Yan Zheng | e556ce2 | 2008-11-20 10:25:19 -0500 | [diff] [blame] | 2673 | |
| 2674 | if (sb->s_flags & MS_RDONLY) { |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2675 | ret = btrfs_commit_super(tree_root); |
| 2676 | if (ret) |
| 2677 | goto fail_trans_kthread; |
Yan Zheng | e556ce2 | 2008-11-20 10:25:19 -0500 | [diff] [blame] | 2678 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2679 | } |
Zheng Yan | 1a40e23 | 2008-09-26 10:09:34 -0400 | [diff] [blame] | 2680 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2681 | ret = btrfs_find_orphan_roots(tree_root); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2682 | if (ret) |
| 2683 | goto fail_trans_kthread; |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2684 | |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2685 | if (!(sb->s_flags & MS_RDONLY)) { |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2686 | ret = btrfs_cleanup_fs_roots(fs_info); |
Ilya Dryomov | 44c44af | 2012-06-22 12:14:13 -0600 | [diff] [blame] | 2687 | if (ret) |
| 2688 | goto fail_trans_kthread; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2689 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2690 | ret = btrfs_recover_relocation(tree_root); |
Miao Xie | d7ce584 | 2010-02-02 08:46:44 +0000 | [diff] [blame] | 2691 | if (ret < 0) { |
| 2692 | printk(KERN_WARNING |
| 2693 | "btrfs: failed to recover relocation\n"); |
| 2694 | err = -EINVAL; |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2695 | goto fail_qgroup; |
Miao Xie | d7ce584 | 2010-02-02 08:46:44 +0000 | [diff] [blame] | 2696 | } |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2697 | } |
Zheng Yan | 1a40e23 | 2008-09-26 10:09:34 -0400 | [diff] [blame] | 2698 | |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 2699 | location.objectid = BTRFS_FS_TREE_OBJECTID; |
| 2700 | location.type = BTRFS_ROOT_ITEM_KEY; |
| 2701 | location.offset = (u64)-1; |
| 2702 | |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 2703 | fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); |
| 2704 | if (!fs_info->fs_root) |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2705 | goto fail_qgroup; |
Dan Carpenter | 3140c9a | 2010-05-29 09:44:10 +0000 | [diff] [blame] | 2706 | if (IS_ERR(fs_info->fs_root)) { |
| 2707 | err = PTR_ERR(fs_info->fs_root); |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2708 | goto fail_qgroup; |
Dan Carpenter | 3140c9a | 2010-05-29 09:44:10 +0000 | [diff] [blame] | 2709 | } |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 2710 | |
Ilya Dryomov | 2b6ba62 | 2012-06-22 12:24:13 -0600 | [diff] [blame] | 2711 | if (sb->s_flags & MS_RDONLY) |
| 2712 | return 0; |
Ilya Dryomov | 5964101 | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 2713 | |
Ilya Dryomov | 2b6ba62 | 2012-06-22 12:24:13 -0600 | [diff] [blame] | 2714 | down_read(&fs_info->cleanup_work_sem); |
| 2715 | if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || |
| 2716 | (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { |
Josef Bacik | e3acc2a | 2010-01-26 14:30:53 +0000 | [diff] [blame] | 2717 | up_read(&fs_info->cleanup_work_sem); |
Ilya Dryomov | 2b6ba62 | 2012-06-22 12:24:13 -0600 | [diff] [blame] | 2718 | close_ctree(tree_root); |
| 2719 | return ret; |
| 2720 | } |
| 2721 | up_read(&fs_info->cleanup_work_sem); |
Ilya Dryomov | 5964101 | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 2722 | |
Ilya Dryomov | 2b6ba62 | 2012-06-22 12:24:13 -0600 | [diff] [blame] | 2723 | ret = btrfs_resume_balance_async(fs_info); |
| 2724 | if (ret) { |
| 2725 | printk(KERN_WARNING "btrfs: failed to resume balance\n"); |
| 2726 | close_ctree(tree_root); |
| 2727 | return ret; |
Josef Bacik | e3acc2a | 2010-01-26 14:30:53 +0000 | [diff] [blame] | 2728 | } |
| 2729 | |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 2730 | ret = btrfs_resume_dev_replace_async(fs_info); |
| 2731 | if (ret) { |
| 2732 | pr_warn("btrfs: failed to resume dev_replace\n"); |
| 2733 | close_ctree(tree_root); |
| 2734 | return ret; |
| 2735 | } |
| 2736 | |
Al Viro | ad2b2c8 | 2011-11-17 01:10:02 -0500 | [diff] [blame] | 2737 | return 0; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2738 | |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 2739 | fail_qgroup: |
| 2740 | btrfs_free_qgroup_config(fs_info); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2741 | fail_trans_kthread: |
| 2742 | kthread_stop(fs_info->transaction_kthread); |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2743 | fail_cleaner: |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2744 | kthread_stop(fs_info->cleaner_kthread); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2745 | |
| 2746 | /* |
| 2747 | * make sure we're done with the btree inode before we stop our |
| 2748 | * kthreads |
| 2749 | */ |
| 2750 | filemap_write_and_wait(fs_info->btree_inode->i_mapping); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2751 | |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 2752 | fail_block_groups: |
| 2753 | btrfs_free_block_groups(fs_info); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2754 | |
| 2755 | fail_tree_roots: |
| 2756 | free_root_pointers(fs_info, 1); |
Miao Xie | 2b8195b | 2013-02-07 06:01:35 +0000 | [diff] [blame] | 2757 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2758 | |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2759 | fail_sb_buffer: |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2760 | btrfs_stop_workers(&fs_info->generic_worker); |
Chris Mason | 306c8b6 | 2011-11-03 15:21:39 -0400 | [diff] [blame] | 2761 | btrfs_stop_workers(&fs_info->readahead_workers); |
Chris Mason | 247e743 | 2008-07-17 12:53:51 -0400 | [diff] [blame] | 2762 | btrfs_stop_workers(&fs_info->fixup_workers); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2763 | btrfs_stop_workers(&fs_info->delalloc_workers); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 2764 | btrfs_stop_workers(&fs_info->workers); |
| 2765 | btrfs_stop_workers(&fs_info->endio_workers); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2766 | btrfs_stop_workers(&fs_info->endio_meta_workers); |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 2767 | btrfs_stop_workers(&fs_info->endio_raid56_workers); |
| 2768 | btrfs_stop_workers(&fs_info->rmw_workers); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 2769 | btrfs_stop_workers(&fs_info->endio_meta_write_workers); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 2770 | btrfs_stop_workers(&fs_info->endio_write_workers); |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 2771 | btrfs_stop_workers(&fs_info->endio_freespace_worker); |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 2772 | btrfs_stop_workers(&fs_info->submit_workers); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2773 | btrfs_stop_workers(&fs_info->delayed_workers); |
Josef Bacik | bab39bf | 2011-06-30 14:42:28 -0400 | [diff] [blame] | 2774 | btrfs_stop_workers(&fs_info->caching_workers); |
Miao Xie | 8ccf6f19 | 2012-10-25 09:28:04 +0000 | [diff] [blame] | 2775 | btrfs_stop_workers(&fs_info->flush_workers); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2776 | fail_alloc: |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 2777 | fail_iput: |
Ilya Dryomov | 586e46e | 2011-11-09 13:26:37 +0200 | [diff] [blame] | 2778 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
| 2779 | |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 2780 | iput(fs_info->btree_inode); |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 2781 | fail_delalloc_bytes: |
| 2782 | percpu_counter_destroy(&fs_info->delalloc_bytes); |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 2783 | fail_dirty_metadata_bytes: |
| 2784 | percpu_counter_destroy(&fs_info->dirty_metadata_bytes); |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 2785 | fail_bdi: |
Qinghuang Feng | 7e66285 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2786 | bdi_destroy(&fs_info->bdi); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2787 | fail_srcu: |
| 2788 | cleanup_srcu_struct(&fs_info->subvol_srcu); |
Qinghuang Feng | 7e66285 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2789 | fail: |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 2790 | btrfs_free_stripe_hash_table(fs_info); |
Ilya Dryomov | 586e46e | 2011-11-09 13:26:37 +0200 | [diff] [blame] | 2791 | btrfs_close_devices(fs_info->fs_devices); |
Al Viro | ad2b2c8 | 2011-11-17 01:10:02 -0500 | [diff] [blame] | 2792 | return err; |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2793 | |
| 2794 | recovery_tree_root: |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2795 | if (!btrfs_test_opt(tree_root, RECOVERY)) |
| 2796 | goto fail_tree_roots; |
| 2797 | |
| 2798 | free_root_pointers(fs_info, 0); |
| 2799 | |
| 2800 | /* don't use the log in recovery mode, it won't be valid */ |
| 2801 | btrfs_set_super_log_root(disk_super, 0); |
| 2802 | |
| 2803 | /* we can't trust the free space cache either */ |
| 2804 | btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); |
| 2805 | |
| 2806 | ret = next_root_backup(fs_info, fs_info->super_copy, |
| 2807 | &num_backups_tried, &backup_index); |
| 2808 | if (ret == -1) |
| 2809 | goto fail_block_groups; |
| 2810 | goto retry_root_backup; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 2811 | } |
| 2812 | |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2813 | static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) |
| 2814 | { |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2815 | if (uptodate) { |
| 2816 | set_buffer_uptodate(bh); |
| 2817 | } else { |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 2818 | struct btrfs_device *device = (struct btrfs_device *) |
| 2819 | bh->b_private; |
| 2820 | |
Josef Bacik | 606686e | 2012-06-04 14:03:51 -0400 | [diff] [blame] | 2821 | printk_ratelimited_in_rcu(KERN_WARNING "lost page write due to " |
| 2822 | "I/O error on %s\n", |
| 2823 | rcu_str_deref(device->name)); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 2824 | /* note, we dont' set_buffer_write_io_error because we have |
| 2825 | * our own ways of dealing with the IO errors |
| 2826 | */ |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2827 | clear_buffer_uptodate(bh); |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 2828 | btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2829 | } |
| 2830 | unlock_buffer(bh); |
| 2831 | put_bh(bh); |
| 2832 | } |
| 2833 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2834 | struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) |
| 2835 | { |
| 2836 | struct buffer_head *bh; |
| 2837 | struct buffer_head *latest = NULL; |
| 2838 | struct btrfs_super_block *super; |
| 2839 | int i; |
| 2840 | u64 transid = 0; |
| 2841 | u64 bytenr; |
| 2842 | |
| 2843 | /* we would like to check all the supers, but that would make |
| 2844 | * a btrfs mount succeed after a mkfs from a different FS. |
| 2845 | * So, we need to add a special mount option to scan for |
| 2846 | * later supers, using BTRFS_SUPER_MIRROR_MAX instead |
| 2847 | */ |
| 2848 | for (i = 0; i < 1; i++) { |
| 2849 | bytenr = btrfs_sb_offset(i); |
| 2850 | if (bytenr + 4096 >= i_size_read(bdev->bd_inode)) |
| 2851 | break; |
| 2852 | bh = __bread(bdev, bytenr / 4096, 4096); |
| 2853 | if (!bh) |
| 2854 | continue; |
| 2855 | |
| 2856 | super = (struct btrfs_super_block *)bh->b_data; |
| 2857 | if (btrfs_super_bytenr(super) != bytenr || |
Zach Brown | cdb4c57 | 2013-02-20 00:55:13 +0000 | [diff] [blame] | 2858 | super->magic != cpu_to_le64(BTRFS_MAGIC)) { |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2859 | brelse(bh); |
| 2860 | continue; |
| 2861 | } |
| 2862 | |
| 2863 | if (!latest || btrfs_super_generation(super) > transid) { |
| 2864 | brelse(latest); |
| 2865 | latest = bh; |
| 2866 | transid = btrfs_super_generation(super); |
| 2867 | } else { |
| 2868 | brelse(bh); |
| 2869 | } |
| 2870 | } |
| 2871 | return latest; |
| 2872 | } |
| 2873 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2874 | /* |
| 2875 | * this should be called twice, once with wait == 0 and |
| 2876 | * once with wait == 1. When wait == 0 is done, all the buffer heads |
| 2877 | * we write are pinned. |
| 2878 | * |
| 2879 | * They are released when wait == 1 is done. |
| 2880 | * max_mirrors must be the same for both runs, and it indicates how |
| 2881 | * many supers on this one device should be written. |
| 2882 | * |
| 2883 | * max_mirrors == 0 means to write them all. |
| 2884 | */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2885 | static int write_dev_supers(struct btrfs_device *device, |
| 2886 | struct btrfs_super_block *sb, |
| 2887 | int do_barriers, int wait, int max_mirrors) |
| 2888 | { |
| 2889 | struct buffer_head *bh; |
| 2890 | int i; |
| 2891 | int ret; |
| 2892 | int errors = 0; |
| 2893 | u32 crc; |
| 2894 | u64 bytenr; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2895 | |
| 2896 | if (max_mirrors == 0) |
| 2897 | max_mirrors = BTRFS_SUPER_MIRROR_MAX; |
| 2898 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2899 | for (i = 0; i < max_mirrors; i++) { |
| 2900 | bytenr = btrfs_sb_offset(i); |
| 2901 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes) |
| 2902 | break; |
| 2903 | |
| 2904 | if (wait) { |
| 2905 | bh = __find_get_block(device->bdev, bytenr / 4096, |
| 2906 | BTRFS_SUPER_INFO_SIZE); |
| 2907 | BUG_ON(!bh); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2908 | wait_on_buffer(bh); |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2909 | if (!buffer_uptodate(bh)) |
| 2910 | errors++; |
| 2911 | |
| 2912 | /* drop our reference */ |
| 2913 | brelse(bh); |
| 2914 | |
| 2915 | /* drop the reference from the wait == 0 run */ |
| 2916 | brelse(bh); |
| 2917 | continue; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2918 | } else { |
| 2919 | btrfs_set_super_bytenr(sb, bytenr); |
| 2920 | |
| 2921 | crc = ~(u32)0; |
| 2922 | crc = btrfs_csum_data(NULL, (char *)sb + |
| 2923 | BTRFS_CSUM_SIZE, crc, |
| 2924 | BTRFS_SUPER_INFO_SIZE - |
| 2925 | BTRFS_CSUM_SIZE); |
| 2926 | btrfs_csum_final(crc, sb->csum); |
| 2927 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2928 | /* |
| 2929 | * one reference for us, and we leave it for the |
| 2930 | * caller |
| 2931 | */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2932 | bh = __getblk(device->bdev, bytenr / 4096, |
| 2933 | BTRFS_SUPER_INFO_SIZE); |
| 2934 | memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); |
| 2935 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2936 | /* one reference for submit_bh */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2937 | get_bh(bh); |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2938 | |
| 2939 | set_buffer_uptodate(bh); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2940 | lock_buffer(bh); |
| 2941 | bh->b_end_io = btrfs_end_buffer_write_sync; |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 2942 | bh->b_private = device; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2943 | } |
| 2944 | |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 2945 | /* |
| 2946 | * we fua the first super. The others we allow |
| 2947 | * to go down lazy. |
| 2948 | */ |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 2949 | ret = btrfsic_submit_bh(WRITE_FUA, bh); |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2950 | if (ret) |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2951 | errors++; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2952 | } |
| 2953 | return errors < i ? 0 : -1; |
| 2954 | } |
| 2955 | |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 2956 | /* |
| 2957 | * endio for the write_dev_flush, this will wake anyone waiting |
| 2958 | * for the barrier when it is done |
| 2959 | */ |
| 2960 | static void btrfs_end_empty_barrier(struct bio *bio, int err) |
| 2961 | { |
| 2962 | if (err) { |
| 2963 | if (err == -EOPNOTSUPP) |
| 2964 | set_bit(BIO_EOPNOTSUPP, &bio->bi_flags); |
| 2965 | clear_bit(BIO_UPTODATE, &bio->bi_flags); |
| 2966 | } |
| 2967 | if (bio->bi_private) |
| 2968 | complete(bio->bi_private); |
| 2969 | bio_put(bio); |
| 2970 | } |
| 2971 | |
| 2972 | /* |
| 2973 | * trigger flushes for one the devices. If you pass wait == 0, the flushes are |
| 2974 | * sent down. With wait == 1, it waits for the previous flush. |
| 2975 | * |
| 2976 | * any device where the flush fails with eopnotsupp are flagged as not-barrier |
| 2977 | * capable |
| 2978 | */ |
| 2979 | static int write_dev_flush(struct btrfs_device *device, int wait) |
| 2980 | { |
| 2981 | struct bio *bio; |
| 2982 | int ret = 0; |
| 2983 | |
| 2984 | if (device->nobarriers) |
| 2985 | return 0; |
| 2986 | |
| 2987 | if (wait) { |
| 2988 | bio = device->flush_bio; |
| 2989 | if (!bio) |
| 2990 | return 0; |
| 2991 | |
| 2992 | wait_for_completion(&device->flush_wait); |
| 2993 | |
| 2994 | if (bio_flagged(bio, BIO_EOPNOTSUPP)) { |
Josef Bacik | 606686e | 2012-06-04 14:03:51 -0400 | [diff] [blame] | 2995 | printk_in_rcu("btrfs: disabling barriers on dev %s\n", |
| 2996 | rcu_str_deref(device->name)); |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 2997 | device->nobarriers = 1; |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 2998 | } else if (!bio_flagged(bio, BIO_UPTODATE)) { |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 2999 | ret = -EIO; |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3000 | btrfs_dev_stat_inc_and_print(device, |
| 3001 | BTRFS_DEV_STAT_FLUSH_ERRS); |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3002 | } |
| 3003 | |
| 3004 | /* drop the reference from the wait == 0 run */ |
| 3005 | bio_put(bio); |
| 3006 | device->flush_bio = NULL; |
| 3007 | |
| 3008 | return ret; |
| 3009 | } |
| 3010 | |
| 3011 | /* |
| 3012 | * one reference for us, and we leave it for the |
| 3013 | * caller |
| 3014 | */ |
Jesper Juhl | 9c017ab | 2012-02-27 00:04:56 +0100 | [diff] [blame] | 3015 | device->flush_bio = NULL; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3016 | bio = bio_alloc(GFP_NOFS, 0); |
| 3017 | if (!bio) |
| 3018 | return -ENOMEM; |
| 3019 | |
| 3020 | bio->bi_end_io = btrfs_end_empty_barrier; |
| 3021 | bio->bi_bdev = device->bdev; |
| 3022 | init_completion(&device->flush_wait); |
| 3023 | bio->bi_private = &device->flush_wait; |
| 3024 | device->flush_bio = bio; |
| 3025 | |
| 3026 | bio_get(bio); |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 3027 | btrfsic_submit_bio(WRITE_FLUSH, bio); |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3028 | |
| 3029 | return 0; |
| 3030 | } |
| 3031 | |
| 3032 | /* |
| 3033 | * send an empty flush down to each device in parallel, |
| 3034 | * then wait for them |
| 3035 | */ |
| 3036 | static int barrier_all_devices(struct btrfs_fs_info *info) |
| 3037 | { |
| 3038 | struct list_head *head; |
| 3039 | struct btrfs_device *dev; |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3040 | int errors_send = 0; |
| 3041 | int errors_wait = 0; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3042 | int ret; |
| 3043 | |
| 3044 | /* send down all the barriers */ |
| 3045 | head = &info->fs_devices->devices; |
| 3046 | list_for_each_entry_rcu(dev, head, dev_list) { |
| 3047 | if (!dev->bdev) { |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3048 | errors_send++; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3049 | continue; |
| 3050 | } |
| 3051 | if (!dev->in_fs_metadata || !dev->writeable) |
| 3052 | continue; |
| 3053 | |
| 3054 | ret = write_dev_flush(dev, 0); |
| 3055 | if (ret) |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3056 | errors_send++; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3057 | } |
| 3058 | |
| 3059 | /* wait for all the barriers */ |
| 3060 | list_for_each_entry_rcu(dev, head, dev_list) { |
| 3061 | if (!dev->bdev) { |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3062 | errors_wait++; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3063 | continue; |
| 3064 | } |
| 3065 | if (!dev->in_fs_metadata || !dev->writeable) |
| 3066 | continue; |
| 3067 | |
| 3068 | ret = write_dev_flush(dev, 1); |
| 3069 | if (ret) |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3070 | errors_wait++; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3071 | } |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3072 | if (errors_send > info->num_tolerated_disk_barrier_failures || |
| 3073 | errors_wait > info->num_tolerated_disk_barrier_failures) |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3074 | return -EIO; |
| 3075 | return 0; |
| 3076 | } |
| 3077 | |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3078 | int btrfs_calc_num_tolerated_disk_barrier_failures( |
| 3079 | struct btrfs_fs_info *fs_info) |
| 3080 | { |
| 3081 | struct btrfs_ioctl_space_info space; |
| 3082 | struct btrfs_space_info *sinfo; |
| 3083 | u64 types[] = {BTRFS_BLOCK_GROUP_DATA, |
| 3084 | BTRFS_BLOCK_GROUP_SYSTEM, |
| 3085 | BTRFS_BLOCK_GROUP_METADATA, |
| 3086 | BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; |
| 3087 | int num_types = 4; |
| 3088 | int i; |
| 3089 | int c; |
| 3090 | int num_tolerated_disk_barrier_failures = |
| 3091 | (int)fs_info->fs_devices->num_devices; |
| 3092 | |
| 3093 | for (i = 0; i < num_types; i++) { |
| 3094 | struct btrfs_space_info *tmp; |
| 3095 | |
| 3096 | sinfo = NULL; |
| 3097 | rcu_read_lock(); |
| 3098 | list_for_each_entry_rcu(tmp, &fs_info->space_info, list) { |
| 3099 | if (tmp->flags == types[i]) { |
| 3100 | sinfo = tmp; |
| 3101 | break; |
| 3102 | } |
| 3103 | } |
| 3104 | rcu_read_unlock(); |
| 3105 | |
| 3106 | if (!sinfo) |
| 3107 | continue; |
| 3108 | |
| 3109 | down_read(&sinfo->groups_sem); |
| 3110 | for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { |
| 3111 | if (!list_empty(&sinfo->block_groups[c])) { |
| 3112 | u64 flags; |
| 3113 | |
| 3114 | btrfs_get_block_group_info( |
| 3115 | &sinfo->block_groups[c], &space); |
| 3116 | if (space.total_bytes == 0 || |
| 3117 | space.used_bytes == 0) |
| 3118 | continue; |
| 3119 | flags = space.flags; |
| 3120 | /* |
| 3121 | * return |
| 3122 | * 0: if dup, single or RAID0 is configured for |
| 3123 | * any of metadata, system or data, else |
| 3124 | * 1: if RAID5 is configured, or if RAID1 or |
| 3125 | * RAID10 is configured and only two mirrors |
| 3126 | * are used, else |
| 3127 | * 2: if RAID6 is configured, else |
| 3128 | * num_mirrors - 1: if RAID1 or RAID10 is |
| 3129 | * configured and more than |
| 3130 | * 2 mirrors are used. |
| 3131 | */ |
| 3132 | if (num_tolerated_disk_barrier_failures > 0 && |
| 3133 | ((flags & (BTRFS_BLOCK_GROUP_DUP | |
| 3134 | BTRFS_BLOCK_GROUP_RAID0)) || |
| 3135 | ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) |
| 3136 | == 0))) |
| 3137 | num_tolerated_disk_barrier_failures = 0; |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 3138 | else if (num_tolerated_disk_barrier_failures > 1) { |
| 3139 | if (flags & (BTRFS_BLOCK_GROUP_RAID1 | |
| 3140 | BTRFS_BLOCK_GROUP_RAID5 | |
| 3141 | BTRFS_BLOCK_GROUP_RAID10)) { |
| 3142 | num_tolerated_disk_barrier_failures = 1; |
| 3143 | } else if (flags & |
| 3144 | BTRFS_BLOCK_GROUP_RAID5) { |
| 3145 | num_tolerated_disk_barrier_failures = 2; |
| 3146 | } |
| 3147 | } |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3148 | } |
| 3149 | } |
| 3150 | up_read(&sinfo->groups_sem); |
| 3151 | } |
| 3152 | |
| 3153 | return num_tolerated_disk_barrier_failures; |
| 3154 | } |
| 3155 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3156 | int write_all_supers(struct btrfs_root *root, int max_mirrors) |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3157 | { |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 3158 | struct list_head *head; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3159 | struct btrfs_device *dev; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3160 | struct btrfs_super_block *sb; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3161 | struct btrfs_dev_item *dev_item; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3162 | int ret; |
| 3163 | int do_barriers; |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3164 | int max_errors; |
| 3165 | int total_errors = 0; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3166 | u64 flags; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3167 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 3168 | max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3169 | do_barriers = !btrfs_test_opt(root, NOBARRIER); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 3170 | backup_super_roots(root->fs_info); |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3171 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 3172 | sb = root->fs_info->super_for_commit; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3173 | dev_item = &sb->dev_item; |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 3174 | |
Chris Mason | 174ba50 | 2011-05-27 10:03:58 -0400 | [diff] [blame] | 3175 | mutex_lock(&root->fs_info->fs_devices->device_list_mutex); |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 3176 | head = &root->fs_info->fs_devices->devices; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3177 | |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 3178 | if (do_barriers) { |
| 3179 | ret = barrier_all_devices(root->fs_info); |
| 3180 | if (ret) { |
| 3181 | mutex_unlock( |
| 3182 | &root->fs_info->fs_devices->device_list_mutex); |
| 3183 | btrfs_error(root->fs_info, ret, |
| 3184 | "errors while submitting device barriers."); |
| 3185 | return ret; |
| 3186 | } |
| 3187 | } |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 3188 | |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 3189 | list_for_each_entry_rcu(dev, head, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 3190 | if (!dev->bdev) { |
| 3191 | total_errors++; |
| 3192 | continue; |
| 3193 | } |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 3194 | if (!dev->in_fs_metadata || !dev->writeable) |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 3195 | continue; |
| 3196 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 3197 | btrfs_set_stack_device_generation(dev_item, 0); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3198 | btrfs_set_stack_device_type(dev_item, dev->type); |
| 3199 | btrfs_set_stack_device_id(dev_item, dev->devid); |
| 3200 | btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes); |
| 3201 | btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used); |
| 3202 | btrfs_set_stack_device_io_align(dev_item, dev->io_align); |
| 3203 | btrfs_set_stack_device_io_width(dev_item, dev->io_width); |
| 3204 | btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); |
| 3205 | memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 3206 | memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3207 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 3208 | flags = btrfs_super_flags(sb); |
| 3209 | btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3210 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3211 | ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3212 | if (ret) |
| 3213 | total_errors++; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3214 | } |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3215 | if (total_errors > max_errors) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3216 | printk(KERN_ERR "btrfs: %d errors while writing supers\n", |
| 3217 | total_errors); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3218 | |
| 3219 | /* This shouldn't happen. FUA is masked off if unsupported */ |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3220 | BUG(); |
| 3221 | } |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3222 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3223 | total_errors = 0; |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 3224 | list_for_each_entry_rcu(dev, head, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 3225 | if (!dev->bdev) |
| 3226 | continue; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 3227 | if (!dev->in_fs_metadata || !dev->writeable) |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 3228 | continue; |
| 3229 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3230 | ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); |
| 3231 | if (ret) |
| 3232 | total_errors++; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3233 | } |
Chris Mason | 174ba50 | 2011-05-27 10:03:58 -0400 | [diff] [blame] | 3234 | mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3235 | if (total_errors > max_errors) { |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3236 | btrfs_error(root->fs_info, -EIO, |
| 3237 | "%d errors while writing supers", total_errors); |
| 3238 | return -EIO; |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 3239 | } |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 3240 | return 0; |
| 3241 | } |
| 3242 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3243 | int write_ctree_super(struct btrfs_trans_handle *trans, |
| 3244 | struct btrfs_root *root, int max_mirrors) |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 3245 | { |
Chris Mason | e66f709 | 2007-04-20 13:16:02 -0400 | [diff] [blame] | 3246 | int ret; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 3247 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3248 | ret = write_all_supers(root, max_mirrors); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 3249 | return ret; |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 3250 | } |
| 3251 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 3252 | void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 3253 | { |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3254 | spin_lock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 3255 | radix_tree_delete(&fs_info->fs_roots_radix, |
| 3256 | (unsigned long)root->root_key.objectid); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3257 | spin_unlock(&fs_info->fs_roots_radix_lock); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 3258 | |
| 3259 | if (btrfs_root_refs(&root->root_item) == 0) |
| 3260 | synchronize_srcu(&fs_info->subvol_srcu); |
| 3261 | |
Liu Bo | d763448 | 2013-03-11 09:20:00 +0000 | [diff] [blame] | 3262 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { |
Liu Bo | 3321719 | 2013-02-27 13:28:24 +0000 | [diff] [blame] | 3263 | btrfs_free_log(NULL, root); |
| 3264 | btrfs_free_log_root_tree(NULL, fs_info); |
| 3265 | } |
| 3266 | |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 3267 | __btrfs_remove_free_space_cache(root->free_ino_pinned); |
| 3268 | __btrfs_remove_free_space_cache(root->free_ino_ctl); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3269 | free_fs_root(root); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3270 | } |
| 3271 | |
| 3272 | static void free_fs_root(struct btrfs_root *root) |
| 3273 | { |
Li Zefan | 82d5902 | 2011-04-20 10:33:24 +0800 | [diff] [blame] | 3274 | iput(root->cache_inode); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3275 | WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); |
Al Viro | 0ee5dc6 | 2011-07-07 15:44:25 -0400 | [diff] [blame] | 3276 | if (root->anon_dev) |
| 3277 | free_anon_bdev(root->anon_dev); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 3278 | free_extent_buffer(root->node); |
| 3279 | free_extent_buffer(root->commit_root); |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 3280 | kfree(root->free_ino_ctl); |
| 3281 | kfree(root->free_ino_pinned); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3282 | kfree(root->name); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 3283 | kfree(root); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 3284 | } |
| 3285 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 3286 | static void del_fs_roots(struct btrfs_fs_info *fs_info) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 3287 | { |
| 3288 | int ret; |
| 3289 | struct btrfs_root *gang[8]; |
| 3290 | int i; |
| 3291 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 3292 | while (!list_empty(&fs_info->dead_roots)) { |
| 3293 | gang[0] = list_entry(fs_info->dead_roots.next, |
| 3294 | struct btrfs_root, root_list); |
| 3295 | list_del(&gang[0]->root_list); |
| 3296 | |
| 3297 | if (gang[0]->in_radix) { |
| 3298 | btrfs_free_fs_root(fs_info, gang[0]); |
| 3299 | } else { |
| 3300 | free_extent_buffer(gang[0]->node); |
| 3301 | free_extent_buffer(gang[0]->commit_root); |
| 3302 | kfree(gang[0]); |
| 3303 | } |
| 3304 | } |
| 3305 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3306 | while (1) { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 3307 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
| 3308 | (void **)gang, 0, |
| 3309 | ARRAY_SIZE(gang)); |
| 3310 | if (!ret) |
| 3311 | break; |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 3312 | for (i = 0; i < ret; i++) |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 3313 | btrfs_free_fs_root(fs_info, gang[i]); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 3314 | } |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 3315 | } |
Chris Mason | b4100d6 | 2007-04-12 12:14:00 -0400 | [diff] [blame] | 3316 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3317 | int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) |
| 3318 | { |
| 3319 | u64 root_objectid = 0; |
| 3320 | struct btrfs_root *gang[8]; |
| 3321 | int i; |
| 3322 | int ret; |
| 3323 | |
| 3324 | while (1) { |
| 3325 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
| 3326 | (void **)gang, root_objectid, |
| 3327 | ARRAY_SIZE(gang)); |
| 3328 | if (!ret) |
| 3329 | break; |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 3330 | |
| 3331 | root_objectid = gang[ret - 1]->root_key.objectid + 1; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3332 | for (i = 0; i < ret; i++) { |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 3333 | int err; |
| 3334 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3335 | root_objectid = gang[i]->root_key.objectid; |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 3336 | err = btrfs_orphan_cleanup(gang[i]); |
| 3337 | if (err) |
| 3338 | return err; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3339 | } |
| 3340 | root_objectid++; |
| 3341 | } |
| 3342 | return 0; |
| 3343 | } |
| 3344 | |
| 3345 | int btrfs_commit_super(struct btrfs_root *root) |
| 3346 | { |
| 3347 | struct btrfs_trans_handle *trans; |
| 3348 | int ret; |
| 3349 | |
| 3350 | mutex_lock(&root->fs_info->cleaner_mutex); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 3351 | btrfs_run_delayed_iputs(root); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3352 | btrfs_clean_old_snapshots(root); |
| 3353 | mutex_unlock(&root->fs_info->cleaner_mutex); |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 3354 | |
| 3355 | /* wait until ongoing cleanup work done */ |
| 3356 | down_write(&root->fs_info->cleanup_work_sem); |
| 3357 | up_write(&root->fs_info->cleanup_work_sem); |
| 3358 | |
Josef Bacik | 7a7eaa4 | 2011-04-13 12:54:33 -0400 | [diff] [blame] | 3359 | trans = btrfs_join_transaction(root); |
Tsutomu Itoh | 3612b49 | 2011-01-25 02:51:38 +0000 | [diff] [blame] | 3360 | if (IS_ERR(trans)) |
| 3361 | return PTR_ERR(trans); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3362 | ret = btrfs_commit_transaction(trans, root); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3363 | if (ret) |
| 3364 | return ret; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3365 | /* run commit again to drop the original snapshot */ |
Josef Bacik | 7a7eaa4 | 2011-04-13 12:54:33 -0400 | [diff] [blame] | 3366 | trans = btrfs_join_transaction(root); |
Tsutomu Itoh | 3612b49 | 2011-01-25 02:51:38 +0000 | [diff] [blame] | 3367 | if (IS_ERR(trans)) |
| 3368 | return PTR_ERR(trans); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3369 | ret = btrfs_commit_transaction(trans, root); |
| 3370 | if (ret) |
| 3371 | return ret; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3372 | ret = btrfs_write_and_wait_transaction(NULL, root); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3373 | if (ret) { |
| 3374 | btrfs_error(root->fs_info, ret, |
| 3375 | "Failed to sync btree inode to disk."); |
| 3376 | return ret; |
| 3377 | } |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3378 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3379 | ret = write_ctree_super(NULL, root, 0); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3380 | return ret; |
| 3381 | } |
| 3382 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 3383 | int close_ctree(struct btrfs_root *root) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3384 | { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 3385 | struct btrfs_fs_info *fs_info = root->fs_info; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3386 | int ret; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 3387 | |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 3388 | fs_info->closing = 1; |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 3389 | smp_mb(); |
| 3390 | |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 3391 | /* pause restriper - we want to resume on mount */ |
Stefan Behrens | aa1b8cd | 2012-11-05 17:03:39 +0100 | [diff] [blame] | 3392 | btrfs_pause_balance(fs_info); |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 3393 | |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 3394 | btrfs_dev_replace_suspend_for_unmount(fs_info); |
| 3395 | |
Stefan Behrens | aa1b8cd | 2012-11-05 17:03:39 +0100 | [diff] [blame] | 3396 | btrfs_scrub_cancel(fs_info); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 3397 | |
| 3398 | /* wait for any defraggers to finish */ |
| 3399 | wait_event(fs_info->transaction_wait, |
| 3400 | (atomic_read(&fs_info->defrag_running) == 0)); |
| 3401 | |
| 3402 | /* clear out the rbtree of defraggable inodes */ |
Miao Xie | 26176e7 | 2012-11-26 09:26:20 +0000 | [diff] [blame] | 3403 | btrfs_cleanup_defrag_inodes(fs_info); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 3404 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3405 | if (!(fs_info->sb->s_flags & MS_RDONLY)) { |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3406 | ret = btrfs_commit_super(root); |
| 3407 | if (ret) |
| 3408 | printk(KERN_ERR "btrfs: commit super ret %d\n", ret); |
| 3409 | } |
| 3410 | |
Miao Xie | 87533c4 | 2013-01-29 10:14:48 +0000 | [diff] [blame] | 3411 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) |
Stefan Behrens | 68ce968 | 2012-08-01 05:45:52 -0600 | [diff] [blame] | 3412 | btrfs_error_commit_super(root); |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 3413 | |
Josef Bacik | 300e4f8 | 2011-08-29 14:06:00 -0400 | [diff] [blame] | 3414 | btrfs_put_block_group_cache(fs_info); |
| 3415 | |
Al Viro | e3029d9 | 2011-11-17 00:56:18 -0500 | [diff] [blame] | 3416 | kthread_stop(fs_info->transaction_kthread); |
| 3417 | kthread_stop(fs_info->cleaner_kthread); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 3418 | |
Yan Zheng | f25784b | 2009-07-28 08:41:57 -0400 | [diff] [blame] | 3419 | fs_info->closing = 2; |
| 3420 | smp_mb(); |
| 3421 | |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 3422 | btrfs_free_qgroup_config(root->fs_info); |
| 3423 | |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 3424 | if (percpu_counter_sum(&fs_info->delalloc_bytes)) { |
| 3425 | printk(KERN_INFO "btrfs: at unmount delalloc count %lld\n", |
| 3426 | percpu_counter_sum(&fs_info->delalloc_bytes)); |
Chris Mason | b0c68f8 | 2008-01-31 11:05:37 -0500 | [diff] [blame] | 3427 | } |
Yan | bcc63ab | 2008-07-30 16:29:20 -0400 | [diff] [blame] | 3428 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 3429 | free_extent_buffer(fs_info->extent_root->node); |
| 3430 | free_extent_buffer(fs_info->extent_root->commit_root); |
| 3431 | free_extent_buffer(fs_info->tree_root->node); |
| 3432 | free_extent_buffer(fs_info->tree_root->commit_root); |
Al Viro | e3029d9 | 2011-11-17 00:56:18 -0500 | [diff] [blame] | 3433 | free_extent_buffer(fs_info->chunk_root->node); |
| 3434 | free_extent_buffer(fs_info->chunk_root->commit_root); |
| 3435 | free_extent_buffer(fs_info->dev_root->node); |
| 3436 | free_extent_buffer(fs_info->dev_root->commit_root); |
| 3437 | free_extent_buffer(fs_info->csum_root->node); |
| 3438 | free_extent_buffer(fs_info->csum_root->commit_root); |
Arne Jansen | bcef60f | 2011-09-13 15:23:30 +0200 | [diff] [blame] | 3439 | if (fs_info->quota_root) { |
| 3440 | free_extent_buffer(fs_info->quota_root->node); |
| 3441 | free_extent_buffer(fs_info->quota_root->commit_root); |
| 3442 | } |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 3443 | |
Al Viro | e3029d9 | 2011-11-17 00:56:18 -0500 | [diff] [blame] | 3444 | btrfs_free_block_groups(fs_info); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3445 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 3446 | del_fs_roots(fs_info); |
Chris Mason | d10c5f3 | 2007-12-17 20:14:04 -0500 | [diff] [blame] | 3447 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3448 | iput(fs_info->btree_inode); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 3449 | |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 3450 | btrfs_stop_workers(&fs_info->generic_worker); |
Chris Mason | 247e743 | 2008-07-17 12:53:51 -0400 | [diff] [blame] | 3451 | btrfs_stop_workers(&fs_info->fixup_workers); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 3452 | btrfs_stop_workers(&fs_info->delalloc_workers); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 3453 | btrfs_stop_workers(&fs_info->workers); |
| 3454 | btrfs_stop_workers(&fs_info->endio_workers); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 3455 | btrfs_stop_workers(&fs_info->endio_meta_workers); |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 3456 | btrfs_stop_workers(&fs_info->endio_raid56_workers); |
| 3457 | btrfs_stop_workers(&fs_info->rmw_workers); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 3458 | btrfs_stop_workers(&fs_info->endio_meta_write_workers); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 3459 | btrfs_stop_workers(&fs_info->endio_write_workers); |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 3460 | btrfs_stop_workers(&fs_info->endio_freespace_worker); |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 3461 | btrfs_stop_workers(&fs_info->submit_workers); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 3462 | btrfs_stop_workers(&fs_info->delayed_workers); |
Josef Bacik | bab39bf | 2011-06-30 14:42:28 -0400 | [diff] [blame] | 3463 | btrfs_stop_workers(&fs_info->caching_workers); |
Arne Jansen | 90519d6 | 2011-05-23 14:30:00 +0200 | [diff] [blame] | 3464 | btrfs_stop_workers(&fs_info->readahead_workers); |
Miao Xie | 8ccf6f19 | 2012-10-25 09:28:04 +0000 | [diff] [blame] | 3465 | btrfs_stop_workers(&fs_info->flush_workers); |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 3466 | |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 3467 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
| 3468 | if (btrfs_test_opt(root, CHECK_INTEGRITY)) |
| 3469 | btrfsic_unmount(root, fs_info->fs_devices); |
| 3470 | #endif |
| 3471 | |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 3472 | btrfs_close_devices(fs_info->fs_devices); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 3473 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
Chris Mason | b248a41 | 2008-04-14 09:48:18 -0400 | [diff] [blame] | 3474 | |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 3475 | percpu_counter_destroy(&fs_info->dirty_metadata_bytes); |
Miao Xie | 963d678 | 2013-01-29 10:10:51 +0000 | [diff] [blame] | 3476 | percpu_counter_destroy(&fs_info->delalloc_bytes); |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 3477 | bdi_destroy(&fs_info->bdi); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 3478 | cleanup_srcu_struct(&fs_info->subvol_srcu); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 3479 | |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 3480 | btrfs_free_stripe_hash_table(fs_info); |
| 3481 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3482 | return 0; |
| 3483 | } |
| 3484 | |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 3485 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, |
| 3486 | int atomic) |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 3487 | { |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3488 | int ret; |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 3489 | struct inode *btree_inode = buf->pages[0]->mapping->host; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3490 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 3491 | ret = extent_buffer_uptodate(buf); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3492 | if (!ret) |
| 3493 | return ret; |
| 3494 | |
| 3495 | ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 3496 | parent_transid, atomic); |
| 3497 | if (ret == -EAGAIN) |
| 3498 | return ret; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3499 | return !ret; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 3500 | } |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 3501 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 3502 | int btrfs_set_buffer_uptodate(struct extent_buffer *buf) |
| 3503 | { |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 3504 | return set_extent_buffer_uptodate(buf); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 3505 | } |
| 3506 | |
| 3507 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf) |
| 3508 | { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 3509 | struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 3510 | u64 transid = btrfs_header_generation(buf); |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 3511 | int was_dirty; |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 3512 | |
Chris Mason | b9447ef | 2009-03-09 11:45:38 -0400 | [diff] [blame] | 3513 | btrfs_assert_tree_locked(buf); |
Julia Lawall | 31b1a2b | 2012-11-03 10:58:34 +0000 | [diff] [blame] | 3514 | if (transid != root->fs_info->generation) |
| 3515 | WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, " |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3516 | "found %llu running %llu\n", |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 3517 | (unsigned long long)buf->start, |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3518 | (unsigned long long)transid, |
| 3519 | (unsigned long long)root->fs_info->generation); |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 3520 | was_dirty = set_extent_buffer_dirty(buf); |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 3521 | if (!was_dirty) |
| 3522 | __percpu_counter_add(&root->fs_info->dirty_metadata_bytes, |
| 3523 | buf->len, |
| 3524 | root->fs_info->dirty_metadata_batch); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3525 | } |
| 3526 | |
Liu Bo | b53d3f5 | 2012-11-14 14:34:34 +0000 | [diff] [blame] | 3527 | static void __btrfs_btree_balance_dirty(struct btrfs_root *root, |
| 3528 | int flush_delayed) |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 3529 | { |
Chris Mason | 188de64 | 2008-05-09 11:52:25 -0400 | [diff] [blame] | 3530 | /* |
| 3531 | * looks as though older kernels can get into trouble with |
| 3532 | * this code, they end up stuck in balance_dirty_pages forever |
| 3533 | */ |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 3534 | int ret; |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 3535 | |
Jens Axboe | 6933c02 | 2009-03-17 09:36:37 +0100 | [diff] [blame] | 3536 | if (current->flags & PF_MEMALLOC) |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 3537 | return; |
| 3538 | |
Liu Bo | b53d3f5 | 2012-11-14 14:34:34 +0000 | [diff] [blame] | 3539 | if (flush_delayed) |
| 3540 | btrfs_balance_delayed_items(root); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 3541 | |
Miao Xie | e2d8452 | 2013-01-29 10:09:20 +0000 | [diff] [blame] | 3542 | ret = percpu_counter_compare(&root->fs_info->dirty_metadata_bytes, |
| 3543 | BTRFS_DIRTY_METADATA_THRESH); |
| 3544 | if (ret > 0) { |
Namjae Jeon | d0e1d66 | 2012-12-11 16:00:21 -0800 | [diff] [blame] | 3545 | balance_dirty_pages_ratelimited( |
| 3546 | root->fs_info->btree_inode->i_mapping); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 3547 | } |
| 3548 | return; |
| 3549 | } |
| 3550 | |
Liu Bo | b53d3f5 | 2012-11-14 14:34:34 +0000 | [diff] [blame] | 3551 | void btrfs_btree_balance_dirty(struct btrfs_root *root) |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 3552 | { |
Liu Bo | b53d3f5 | 2012-11-14 14:34:34 +0000 | [diff] [blame] | 3553 | __btrfs_btree_balance_dirty(root, 1); |
| 3554 | } |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 3555 | |
Liu Bo | b53d3f5 | 2012-11-14 14:34:34 +0000 | [diff] [blame] | 3556 | void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root) |
| 3557 | { |
| 3558 | __btrfs_btree_balance_dirty(root, 0); |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 3559 | } |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 3560 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 3561 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 3562 | { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 3563 | struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 3564 | return btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 3565 | } |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 3566 | |
David Sterba | fcd1f065 | 2012-03-06 00:06:18 +0100 | [diff] [blame] | 3567 | static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3568 | int read_only) |
| 3569 | { |
David Sterba | fcd1f065 | 2012-03-06 00:06:18 +0100 | [diff] [blame] | 3570 | if (btrfs_super_csum_type(fs_info->super_copy) >= ARRAY_SIZE(btrfs_csum_sizes)) { |
| 3571 | printk(KERN_ERR "btrfs: unsupported checksum algorithm\n"); |
| 3572 | return -EINVAL; |
| 3573 | } |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3574 | |
David Sterba | fcd1f065 | 2012-03-06 00:06:18 +0100 | [diff] [blame] | 3575 | if (read_only) |
| 3576 | return 0; |
| 3577 | |
David Sterba | fcd1f065 | 2012-03-06 00:06:18 +0100 | [diff] [blame] | 3578 | return 0; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3579 | } |
| 3580 | |
Stefan Behrens | 68ce968 | 2012-08-01 05:45:52 -0600 | [diff] [blame] | 3581 | void btrfs_error_commit_super(struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3582 | { |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3583 | mutex_lock(&root->fs_info->cleaner_mutex); |
| 3584 | btrfs_run_delayed_iputs(root); |
| 3585 | mutex_unlock(&root->fs_info->cleaner_mutex); |
| 3586 | |
| 3587 | down_write(&root->fs_info->cleanup_work_sem); |
| 3588 | up_write(&root->fs_info->cleanup_work_sem); |
| 3589 | |
| 3590 | /* cleanup FS via transaction */ |
| 3591 | btrfs_cleanup_transaction(root); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3592 | } |
| 3593 | |
Josef Bacik | 569e0f3 | 2013-02-13 11:09:14 -0500 | [diff] [blame] | 3594 | static void btrfs_destroy_ordered_operations(struct btrfs_transaction *t, |
| 3595 | struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3596 | { |
| 3597 | struct btrfs_inode *btrfs_inode; |
| 3598 | struct list_head splice; |
| 3599 | |
| 3600 | INIT_LIST_HEAD(&splice); |
| 3601 | |
| 3602 | mutex_lock(&root->fs_info->ordered_operations_mutex); |
| 3603 | spin_lock(&root->fs_info->ordered_extent_lock); |
| 3604 | |
Josef Bacik | 569e0f3 | 2013-02-13 11:09:14 -0500 | [diff] [blame] | 3605 | list_splice_init(&t->ordered_operations, &splice); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3606 | while (!list_empty(&splice)) { |
| 3607 | btrfs_inode = list_entry(splice.next, struct btrfs_inode, |
| 3608 | ordered_operations); |
| 3609 | |
| 3610 | list_del_init(&btrfs_inode->ordered_operations); |
| 3611 | |
| 3612 | btrfs_invalidate_inodes(btrfs_inode->root); |
| 3613 | } |
| 3614 | |
| 3615 | spin_unlock(&root->fs_info->ordered_extent_lock); |
| 3616 | mutex_unlock(&root->fs_info->ordered_operations_mutex); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3617 | } |
| 3618 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 3619 | static void btrfs_destroy_ordered_extents(struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3620 | { |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3621 | struct btrfs_ordered_extent *ordered; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3622 | |
| 3623 | spin_lock(&root->fs_info->ordered_extent_lock); |
Josef Bacik | 779880e | 2013-01-31 14:30:08 -0500 | [diff] [blame] | 3624 | /* |
| 3625 | * This will just short circuit the ordered completion stuff which will |
| 3626 | * make sure the ordered extent gets properly cleaned up. |
| 3627 | */ |
| 3628 | list_for_each_entry(ordered, &root->fs_info->ordered_extents, |
| 3629 | root_extent_list) |
| 3630 | set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3631 | spin_unlock(&root->fs_info->ordered_extent_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3632 | } |
| 3633 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3634 | int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
| 3635 | struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3636 | { |
| 3637 | struct rb_node *node; |
| 3638 | struct btrfs_delayed_ref_root *delayed_refs; |
| 3639 | struct btrfs_delayed_ref_node *ref; |
| 3640 | int ret = 0; |
| 3641 | |
| 3642 | delayed_refs = &trans->delayed_refs; |
| 3643 | |
| 3644 | spin_lock(&delayed_refs->lock); |
| 3645 | if (delayed_refs->num_entries == 0) { |
David Sterba | cfece4d | 2011-04-25 19:43:52 -0400 | [diff] [blame] | 3646 | spin_unlock(&delayed_refs->lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3647 | printk(KERN_INFO "delayed_refs has NO entry\n"); |
| 3648 | return ret; |
| 3649 | } |
| 3650 | |
Josef Bacik | b939d1a | 2012-05-31 11:06:33 -0400 | [diff] [blame] | 3651 | while ((node = rb_first(&delayed_refs->root)) != NULL) { |
Josef Bacik | eb12db6 | 2013-01-30 16:03:59 -0500 | [diff] [blame] | 3652 | struct btrfs_delayed_ref_head *head = NULL; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3653 | |
Josef Bacik | eb12db6 | 2013-01-30 16:03:59 -0500 | [diff] [blame] | 3654 | ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3655 | atomic_set(&ref->refs, 1); |
| 3656 | if (btrfs_delayed_ref_is_head(ref)) { |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3657 | |
| 3658 | head = btrfs_delayed_node_to_head(ref); |
Josef Bacik | b939d1a | 2012-05-31 11:06:33 -0400 | [diff] [blame] | 3659 | if (!mutex_trylock(&head->mutex)) { |
| 3660 | atomic_inc(&ref->refs); |
| 3661 | spin_unlock(&delayed_refs->lock); |
| 3662 | |
| 3663 | /* Need to wait for the delayed ref to run */ |
| 3664 | mutex_lock(&head->mutex); |
| 3665 | mutex_unlock(&head->mutex); |
| 3666 | btrfs_put_delayed_ref(ref); |
| 3667 | |
Josef Bacik | e18fca7 | 2012-06-18 07:23:18 -0600 | [diff] [blame] | 3668 | spin_lock(&delayed_refs->lock); |
Josef Bacik | b939d1a | 2012-05-31 11:06:33 -0400 | [diff] [blame] | 3669 | continue; |
| 3670 | } |
| 3671 | |
Miao Xie | 78a6184 | 2012-11-21 02:21:28 +0000 | [diff] [blame] | 3672 | btrfs_free_delayed_extent_op(head->extent_op); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3673 | delayed_refs->num_heads--; |
| 3674 | if (list_empty(&head->cluster)) |
| 3675 | delayed_refs->num_heads_ready--; |
| 3676 | list_del_init(&head->cluster); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3677 | } |
Josef Bacik | eb12db6 | 2013-01-30 16:03:59 -0500 | [diff] [blame] | 3678 | |
Josef Bacik | b939d1a | 2012-05-31 11:06:33 -0400 | [diff] [blame] | 3679 | ref->in_tree = 0; |
| 3680 | rb_erase(&ref->rb_node, &delayed_refs->root); |
| 3681 | delayed_refs->num_entries--; |
Josef Bacik | eb12db6 | 2013-01-30 16:03:59 -0500 | [diff] [blame] | 3682 | if (head) |
| 3683 | mutex_unlock(&head->mutex); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3684 | spin_unlock(&delayed_refs->lock); |
| 3685 | btrfs_put_delayed_ref(ref); |
| 3686 | |
| 3687 | cond_resched(); |
| 3688 | spin_lock(&delayed_refs->lock); |
| 3689 | } |
| 3690 | |
| 3691 | spin_unlock(&delayed_refs->lock); |
| 3692 | |
| 3693 | return ret; |
| 3694 | } |
| 3695 | |
Miao Xie | aec8030 | 2013-03-04 09:44:29 +0000 | [diff] [blame] | 3696 | static void btrfs_evict_pending_snapshots(struct btrfs_transaction *t) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3697 | { |
| 3698 | struct btrfs_pending_snapshot *snapshot; |
| 3699 | struct list_head splice; |
| 3700 | |
| 3701 | INIT_LIST_HEAD(&splice); |
| 3702 | |
| 3703 | list_splice_init(&t->pending_snapshots, &splice); |
| 3704 | |
| 3705 | while (!list_empty(&splice)) { |
| 3706 | snapshot = list_entry(splice.next, |
| 3707 | struct btrfs_pending_snapshot, |
| 3708 | list); |
Miao Xie | aec8030 | 2013-03-04 09:44:29 +0000 | [diff] [blame] | 3709 | snapshot->error = -ECANCELED; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3710 | list_del_init(&snapshot->list); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3711 | } |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3712 | } |
| 3713 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 3714 | static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3715 | { |
| 3716 | struct btrfs_inode *btrfs_inode; |
| 3717 | struct list_head splice; |
| 3718 | |
| 3719 | INIT_LIST_HEAD(&splice); |
| 3720 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3721 | spin_lock(&root->fs_info->delalloc_lock); |
David Sterba | 5be7675 | 2011-06-09 10:02:51 +0000 | [diff] [blame] | 3722 | list_splice_init(&root->fs_info->delalloc_inodes, &splice); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3723 | |
| 3724 | while (!list_empty(&splice)) { |
| 3725 | btrfs_inode = list_entry(splice.next, struct btrfs_inode, |
| 3726 | delalloc_inodes); |
| 3727 | |
| 3728 | list_del_init(&btrfs_inode->delalloc_inodes); |
Miao Xie | df0af1a | 2013-01-29 10:11:59 +0000 | [diff] [blame] | 3729 | clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, |
| 3730 | &btrfs_inode->runtime_flags); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3731 | |
| 3732 | btrfs_invalidate_inodes(btrfs_inode->root); |
| 3733 | } |
| 3734 | |
| 3735 | spin_unlock(&root->fs_info->delalloc_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3736 | } |
| 3737 | |
| 3738 | static int btrfs_destroy_marked_extents(struct btrfs_root *root, |
| 3739 | struct extent_io_tree *dirty_pages, |
| 3740 | int mark) |
| 3741 | { |
| 3742 | int ret; |
| 3743 | struct page *page; |
| 3744 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 3745 | struct extent_buffer *eb; |
| 3746 | u64 start = 0; |
| 3747 | u64 end; |
| 3748 | u64 offset; |
| 3749 | unsigned long index; |
| 3750 | |
| 3751 | while (1) { |
| 3752 | ret = find_first_extent_bit(dirty_pages, start, &start, &end, |
Josef Bacik | e613887 | 2012-09-27 17:07:30 -0400 | [diff] [blame] | 3753 | mark, NULL); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3754 | if (ret) |
| 3755 | break; |
| 3756 | |
| 3757 | clear_extent_bits(dirty_pages, start, end, mark, GFP_NOFS); |
| 3758 | while (start <= end) { |
| 3759 | index = start >> PAGE_CACHE_SHIFT; |
| 3760 | start = (u64)(index + 1) << PAGE_CACHE_SHIFT; |
| 3761 | page = find_get_page(btree_inode->i_mapping, index); |
| 3762 | if (!page) |
| 3763 | continue; |
| 3764 | offset = page_offset(page); |
| 3765 | |
| 3766 | spin_lock(&dirty_pages->buffer_lock); |
| 3767 | eb = radix_tree_lookup( |
| 3768 | &(&BTRFS_I(page->mapping->host)->io_tree)->buffer, |
| 3769 | offset >> PAGE_CACHE_SHIFT); |
| 3770 | spin_unlock(&dirty_pages->buffer_lock); |
Josef Bacik | ee670f0a | 2012-05-31 15:54:30 -0400 | [diff] [blame] | 3771 | if (eb) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3772 | ret = test_and_clear_bit(EXTENT_BUFFER_DIRTY, |
| 3773 | &eb->bflags); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3774 | if (PageWriteback(page)) |
| 3775 | end_page_writeback(page); |
| 3776 | |
| 3777 | lock_page(page); |
| 3778 | if (PageDirty(page)) { |
| 3779 | clear_page_dirty_for_io(page); |
| 3780 | spin_lock_irq(&page->mapping->tree_lock); |
| 3781 | radix_tree_tag_clear(&page->mapping->page_tree, |
| 3782 | page_index(page), |
| 3783 | PAGECACHE_TAG_DIRTY); |
| 3784 | spin_unlock_irq(&page->mapping->tree_lock); |
| 3785 | } |
| 3786 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3787 | unlock_page(page); |
Josef Bacik | ee670f0a | 2012-05-31 15:54:30 -0400 | [diff] [blame] | 3788 | page_cache_release(page); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3789 | } |
| 3790 | } |
| 3791 | |
| 3792 | return ret; |
| 3793 | } |
| 3794 | |
| 3795 | static int btrfs_destroy_pinned_extent(struct btrfs_root *root, |
| 3796 | struct extent_io_tree *pinned_extents) |
| 3797 | { |
| 3798 | struct extent_io_tree *unpin; |
| 3799 | u64 start; |
| 3800 | u64 end; |
| 3801 | int ret; |
Liu Bo | ed0eaa1 | 2012-06-14 02:23:21 -0600 | [diff] [blame] | 3802 | bool loop = true; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3803 | |
| 3804 | unpin = pinned_extents; |
Liu Bo | ed0eaa1 | 2012-06-14 02:23:21 -0600 | [diff] [blame] | 3805 | again: |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3806 | while (1) { |
| 3807 | ret = find_first_extent_bit(unpin, 0, &start, &end, |
Josef Bacik | e613887 | 2012-09-27 17:07:30 -0400 | [diff] [blame] | 3808 | EXTENT_DIRTY, NULL); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3809 | if (ret) |
| 3810 | break; |
| 3811 | |
| 3812 | /* opt_discard */ |
Li Dongyang | 5378e60 | 2011-03-24 10:24:27 +0000 | [diff] [blame] | 3813 | if (btrfs_test_opt(root, DISCARD)) |
| 3814 | ret = btrfs_error_discard_extent(root, start, |
| 3815 | end + 1 - start, |
| 3816 | NULL); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3817 | |
| 3818 | clear_extent_dirty(unpin, start, end, GFP_NOFS); |
| 3819 | btrfs_error_unpin_extent_range(root, start, end); |
| 3820 | cond_resched(); |
| 3821 | } |
| 3822 | |
Liu Bo | ed0eaa1 | 2012-06-14 02:23:21 -0600 | [diff] [blame] | 3823 | if (loop) { |
| 3824 | if (unpin == &root->fs_info->freed_extents[0]) |
| 3825 | unpin = &root->fs_info->freed_extents[1]; |
| 3826 | else |
| 3827 | unpin = &root->fs_info->freed_extents[0]; |
| 3828 | loop = false; |
| 3829 | goto again; |
| 3830 | } |
| 3831 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3832 | return 0; |
| 3833 | } |
| 3834 | |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 3835 | void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, |
| 3836 | struct btrfs_root *root) |
| 3837 | { |
| 3838 | btrfs_destroy_delayed_refs(cur_trans, root); |
| 3839 | btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv, |
| 3840 | cur_trans->dirty_pages.dirty_bytes); |
| 3841 | |
| 3842 | /* FIXME: cleanup wait for commit */ |
| 3843 | cur_trans->in_commit = 1; |
| 3844 | cur_trans->blocked = 1; |
Josef Bacik | d7096fc | 2012-05-31 15:49:57 -0400 | [diff] [blame] | 3845 | wake_up(&root->fs_info->transaction_blocked_wait); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 3846 | |
Miao Xie | aec8030 | 2013-03-04 09:44:29 +0000 | [diff] [blame] | 3847 | btrfs_evict_pending_snapshots(cur_trans); |
| 3848 | |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 3849 | cur_trans->blocked = 0; |
Josef Bacik | d7096fc | 2012-05-31 15:49:57 -0400 | [diff] [blame] | 3850 | wake_up(&root->fs_info->transaction_wait); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 3851 | |
| 3852 | cur_trans->commit_done = 1; |
Josef Bacik | d7096fc | 2012-05-31 15:49:57 -0400 | [diff] [blame] | 3853 | wake_up(&cur_trans->commit_wait); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 3854 | |
Miao Xie | 67cde34 | 2012-06-14 02:23:22 -0600 | [diff] [blame] | 3855 | btrfs_destroy_delayed_inodes(root); |
| 3856 | btrfs_assert_delayed_root_empty(root); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 3857 | |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 3858 | btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, |
| 3859 | EXTENT_DIRTY); |
Liu Bo | 6e841e3 | 2012-06-14 02:23:20 -0600 | [diff] [blame] | 3860 | btrfs_destroy_pinned_extent(root, |
| 3861 | root->fs_info->pinned_extents); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 3862 | |
| 3863 | /* |
| 3864 | memset(cur_trans, 0, sizeof(*cur_trans)); |
| 3865 | kmem_cache_free(btrfs_transaction_cachep, cur_trans); |
| 3866 | */ |
| 3867 | } |
| 3868 | |
| 3869 | int btrfs_cleanup_transaction(struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3870 | { |
| 3871 | struct btrfs_transaction *t; |
| 3872 | LIST_HEAD(list); |
| 3873 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3874 | mutex_lock(&root->fs_info->transaction_kthread_mutex); |
| 3875 | |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 3876 | spin_lock(&root->fs_info->trans_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3877 | list_splice_init(&root->fs_info->trans_list, &list); |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 3878 | root->fs_info->trans_no_join = 1; |
| 3879 | spin_unlock(&root->fs_info->trans_lock); |
| 3880 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3881 | while (!list_empty(&list)) { |
| 3882 | t = list_entry(list.next, struct btrfs_transaction, list); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3883 | |
Josef Bacik | 569e0f3 | 2013-02-13 11:09:14 -0500 | [diff] [blame] | 3884 | btrfs_destroy_ordered_operations(t, root); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3885 | |
| 3886 | btrfs_destroy_ordered_extents(root); |
| 3887 | |
| 3888 | btrfs_destroy_delayed_refs(t, root); |
| 3889 | |
| 3890 | btrfs_block_rsv_release(root, |
| 3891 | &root->fs_info->trans_block_rsv, |
| 3892 | t->dirty_pages.dirty_bytes); |
| 3893 | |
| 3894 | /* FIXME: cleanup wait for commit */ |
| 3895 | t->in_commit = 1; |
| 3896 | t->blocked = 1; |
Josef Bacik | 66657b3 | 2012-08-01 15:36:24 -0400 | [diff] [blame] | 3897 | smp_mb(); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3898 | if (waitqueue_active(&root->fs_info->transaction_blocked_wait)) |
| 3899 | wake_up(&root->fs_info->transaction_blocked_wait); |
| 3900 | |
Miao Xie | aec8030 | 2013-03-04 09:44:29 +0000 | [diff] [blame] | 3901 | btrfs_evict_pending_snapshots(t); |
| 3902 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3903 | t->blocked = 0; |
Josef Bacik | 66657b3 | 2012-08-01 15:36:24 -0400 | [diff] [blame] | 3904 | smp_mb(); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3905 | if (waitqueue_active(&root->fs_info->transaction_wait)) |
| 3906 | wake_up(&root->fs_info->transaction_wait); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3907 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3908 | t->commit_done = 1; |
Josef Bacik | 66657b3 | 2012-08-01 15:36:24 -0400 | [diff] [blame] | 3909 | smp_mb(); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3910 | if (waitqueue_active(&t->commit_wait)) |
| 3911 | wake_up(&t->commit_wait); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3912 | |
Miao Xie | 67cde34 | 2012-06-14 02:23:22 -0600 | [diff] [blame] | 3913 | btrfs_destroy_delayed_inodes(root); |
| 3914 | btrfs_assert_delayed_root_empty(root); |
| 3915 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3916 | btrfs_destroy_delalloc_inodes(root); |
| 3917 | |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 3918 | spin_lock(&root->fs_info->trans_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3919 | root->fs_info->running_transaction = NULL; |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 3920 | spin_unlock(&root->fs_info->trans_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3921 | |
| 3922 | btrfs_destroy_marked_extents(root, &t->dirty_pages, |
| 3923 | EXTENT_DIRTY); |
| 3924 | |
| 3925 | btrfs_destroy_pinned_extent(root, |
| 3926 | root->fs_info->pinned_extents); |
| 3927 | |
Josef Bacik | 13c5a93 | 2011-04-11 15:45:29 -0400 | [diff] [blame] | 3928 | atomic_set(&t->use_count, 0); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3929 | list_del_init(&t->list); |
| 3930 | memset(t, 0, sizeof(*t)); |
| 3931 | kmem_cache_free(btrfs_transaction_cachep, t); |
| 3932 | } |
| 3933 | |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 3934 | spin_lock(&root->fs_info->trans_lock); |
| 3935 | root->fs_info->trans_no_join = 0; |
| 3936 | spin_unlock(&root->fs_info->trans_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3937 | mutex_unlock(&root->fs_info->transaction_kthread_mutex); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3938 | |
| 3939 | return 0; |
| 3940 | } |
| 3941 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 3942 | static struct extent_io_ops btree_extent_io_ops = { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 3943 | .readpage_end_io_hook = btree_readpage_end_io_hook, |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 3944 | .readpage_io_failed_hook = btree_io_failed_hook, |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 3945 | .submit_bio_hook = btree_submit_bio_hook, |
Chris Mason | 239b14b | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 3946 | /* note we're sharing with inode.c for the merge bio hook */ |
| 3947 | .merge_bio_hook = btrfs_merge_bio_hook, |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 3948 | }; |