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" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 47 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 48 | static struct extent_io_ops btree_extent_io_ops; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 49 | static void end_workqueue_fn(struct btrfs_work *work); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 50 | static void free_fs_root(struct btrfs_root *root); |
David Sterba | fcd1f065 | 2012-03-06 00:06:18 +0100 | [diff] [blame] | 51 | static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 52 | int read_only); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 53 | static void btrfs_destroy_ordered_operations(struct btrfs_root *root); |
| 54 | static void btrfs_destroy_ordered_extents(struct btrfs_root *root); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 55 | static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
| 56 | struct btrfs_root *root); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 57 | static void btrfs_destroy_pending_snapshots(struct btrfs_transaction *t); |
| 58 | static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 59 | static int btrfs_destroy_marked_extents(struct btrfs_root *root, |
| 60 | struct extent_io_tree *dirty_pages, |
| 61 | int mark); |
| 62 | static int btrfs_destroy_pinned_extent(struct btrfs_root *root, |
| 63 | struct extent_io_tree *pinned_extents); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 64 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 65 | /* |
| 66 | * end_io_wq structs are used to do processing in task context when an IO is |
| 67 | * complete. This is used during reads to verify checksums, and it is used |
| 68 | * by writes to insert metadata for new file extents after IO is complete. |
| 69 | */ |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 70 | struct end_io_wq { |
| 71 | struct bio *bio; |
| 72 | bio_end_io_t *end_io; |
| 73 | void *private; |
| 74 | struct btrfs_fs_info *info; |
| 75 | int error; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 76 | int metadata; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 77 | struct list_head list; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 78 | struct btrfs_work work; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 79 | }; |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 80 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 81 | /* |
| 82 | * async submit bios are used to offload expensive checksumming |
| 83 | * onto the worker threads. They checksum file and metadata bios |
| 84 | * just before they are sent down the IO stack. |
| 85 | */ |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 86 | struct async_submit_bio { |
| 87 | struct inode *inode; |
| 88 | struct bio *bio; |
| 89 | struct list_head list; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 90 | extent_submit_bio_hook_t *submit_bio_start; |
| 91 | extent_submit_bio_hook_t *submit_bio_done; |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 92 | int rw; |
| 93 | int mirror_num; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 94 | unsigned long bio_flags; |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 95 | /* |
| 96 | * bio_offset is optional, can be used if the pages in the bio |
| 97 | * can't tell us where in the file the bio should go |
| 98 | */ |
| 99 | u64 bio_offset; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 100 | struct btrfs_work work; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 101 | int error; |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 102 | }; |
| 103 | |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 104 | /* |
| 105 | * Lockdep class keys for extent_buffer->lock's in this root. For a given |
| 106 | * eb, the lockdep key is determined by the btrfs_root it belongs to and |
| 107 | * the level the eb occupies in the tree. |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 108 | * |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 109 | * Different roots are used for different purposes and may nest inside each |
| 110 | * other and they require separate keysets. As lockdep keys should be |
| 111 | * static, assign keysets according to the purpose of the root as indicated |
| 112 | * by btrfs_root->objectid. This ensures that all special purpose roots |
| 113 | * have separate keysets. |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 114 | * |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 115 | * Lock-nesting across peer nodes is always done with the immediate parent |
| 116 | * node locked thus preventing deadlock. As lockdep doesn't know this, use |
| 117 | * subclass to avoid triggering lockdep warning in such cases. |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 118 | * |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 119 | * The key is set by the readpage_end_io_hook after the buffer has passed |
| 120 | * csum validation but before the pages are unlocked. It is also set by |
| 121 | * btrfs_init_new_buffer on freshly allocated blocks. |
| 122 | * |
| 123 | * We also add a check to make sure the highest level of the tree is the |
| 124 | * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code |
| 125 | * needs update as well. |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 126 | */ |
| 127 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 128 | # if BTRFS_MAX_LEVEL != 8 |
| 129 | # error |
| 130 | # endif |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 131 | |
| 132 | static struct btrfs_lockdep_keyset { |
| 133 | u64 id; /* root objectid */ |
| 134 | const char *name_stem; /* lock name stem */ |
| 135 | char names[BTRFS_MAX_LEVEL + 1][20]; |
| 136 | struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; |
| 137 | } btrfs_lockdep_keysets[] = { |
| 138 | { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, |
| 139 | { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, |
| 140 | { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, |
| 141 | { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, |
| 142 | { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, |
| 143 | { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, |
| 144 | { .id = BTRFS_ORPHAN_OBJECTID, .name_stem = "orphan" }, |
| 145 | { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, |
| 146 | { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, |
| 147 | { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, |
| 148 | { .id = 0, .name_stem = "tree" }, |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 149 | }; |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 150 | |
| 151 | void __init btrfs_init_lockdep(void) |
| 152 | { |
| 153 | int i, j; |
| 154 | |
| 155 | /* initialize lockdep class names */ |
| 156 | for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { |
| 157 | struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; |
| 158 | |
| 159 | for (j = 0; j < ARRAY_SIZE(ks->names); j++) |
| 160 | snprintf(ks->names[j], sizeof(ks->names[j]), |
| 161 | "btrfs-%s-%02d", ks->name_stem, j); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, |
| 166 | int level) |
| 167 | { |
| 168 | struct btrfs_lockdep_keyset *ks; |
| 169 | |
| 170 | BUG_ON(level >= ARRAY_SIZE(ks->keys)); |
| 171 | |
| 172 | /* find the matching keyset, id 0 is the default entry */ |
| 173 | for (ks = btrfs_lockdep_keysets; ks->id; ks++) |
| 174 | if (ks->id == objectid) |
| 175 | break; |
| 176 | |
| 177 | lockdep_set_class_and_name(&eb->lock, |
| 178 | &ks->keys[level], ks->names[level]); |
| 179 | } |
| 180 | |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 181 | #endif |
| 182 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 183 | /* |
| 184 | * extents on the btree inode are pretty simple, there's one extent |
| 185 | * that covers the entire device |
| 186 | */ |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 187 | static struct extent_map *btree_get_extent(struct inode *inode, |
David Sterba | 306e16c | 2011-04-19 14:29:38 +0200 | [diff] [blame] | 188 | struct page *page, size_t pg_offset, u64 start, u64 len, |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 189 | int create) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 190 | { |
| 191 | struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; |
| 192 | struct extent_map *em; |
| 193 | int ret; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 194 | |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 195 | read_lock(&em_tree->lock); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 196 | em = lookup_extent_mapping(em_tree, start, len); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 197 | if (em) { |
| 198 | em->bdev = |
| 199 | BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 200 | read_unlock(&em_tree->lock); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 201 | goto out; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 202 | } |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 203 | read_unlock(&em_tree->lock); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 204 | |
David Sterba | 172ddd6 | 2011-04-21 00:48:27 +0200 | [diff] [blame] | 205 | em = alloc_extent_map(); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 206 | if (!em) { |
| 207 | em = ERR_PTR(-ENOMEM); |
| 208 | goto out; |
| 209 | } |
| 210 | em->start = 0; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 211 | em->len = (u64)-1; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 212 | em->block_len = (u64)-1; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 213 | em->block_start = 0; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 214 | em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 215 | |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 216 | write_lock(&em_tree->lock); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 217 | ret = add_extent_mapping(em_tree, em); |
| 218 | if (ret == -EEXIST) { |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 219 | u64 failed_start = em->start; |
| 220 | u64 failed_len = em->len; |
| 221 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 222 | free_extent_map(em); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 223 | em = lookup_extent_mapping(em_tree, start, len); |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 224 | if (em) { |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 225 | ret = 0; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 226 | } else { |
| 227 | em = lookup_extent_mapping(em_tree, failed_start, |
| 228 | failed_len); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 229 | ret = -EIO; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 230 | } |
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); |
| 233 | em = NULL; |
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 | |
| 237 | if (ret) |
| 238 | em = ERR_PTR(ret); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 239 | out: |
| 240 | return em; |
| 241 | } |
| 242 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 243 | u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len) |
| 244 | { |
David Woodhouse | 163e783 | 2009-04-19 13:02:41 +0100 | [diff] [blame] | 245 | return crc32c(seed, data, len); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 246 | } |
| 247 | |
| 248 | void btrfs_csum_final(u32 crc, char *result) |
| 249 | { |
David Sterba | 7e75bf3 | 2011-03-18 22:56:43 +0000 | [diff] [blame] | 250 | put_unaligned_le32(~crc, result); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 251 | } |
| 252 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 253 | /* |
| 254 | * compute the csum for a btree block, and either verify it or write it |
| 255 | * into the csum field of the block. |
| 256 | */ |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 257 | static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, |
| 258 | int verify) |
| 259 | { |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 260 | u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy); |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 261 | char *result = NULL; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 262 | unsigned long len; |
| 263 | unsigned long cur_len; |
| 264 | unsigned long offset = BTRFS_CSUM_SIZE; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 265 | char *kaddr; |
| 266 | unsigned long map_start; |
| 267 | unsigned long map_len; |
| 268 | int err; |
| 269 | u32 crc = ~(u32)0; |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 270 | unsigned long inline_result; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 271 | |
| 272 | len = buf->len - offset; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 273 | while (len > 0) { |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 274 | err = map_private_extent_buffer(buf, offset, 32, |
Chris Mason | a659171 | 2011-07-19 12:04:14 -0400 | [diff] [blame] | 275 | &kaddr, &map_start, &map_len); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 276 | if (err) |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 277 | return 1; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 278 | cur_len = min(len, map_len - (offset - map_start)); |
| 279 | crc = btrfs_csum_data(root, kaddr + offset - map_start, |
| 280 | crc, cur_len); |
| 281 | len -= cur_len; |
| 282 | offset += cur_len; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 283 | } |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 284 | if (csum_size > sizeof(inline_result)) { |
| 285 | result = kzalloc(csum_size * sizeof(char), GFP_NOFS); |
| 286 | if (!result) |
| 287 | return 1; |
| 288 | } else { |
| 289 | result = (char *)&inline_result; |
| 290 | } |
| 291 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 292 | btrfs_csum_final(crc, result); |
| 293 | |
| 294 | if (verify) { |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 295 | if (memcmp_extent_buffer(buf, result, 0, csum_size)) { |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 296 | u32 val; |
| 297 | u32 found = 0; |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 298 | memcpy(&found, result, csum_size); |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 299 | |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 300 | read_extent_buffer(buf, &val, 0, csum_size); |
David Sterba | 7a36dde | 2011-05-06 15:33:15 +0200 | [diff] [blame] | 301 | printk_ratelimited(KERN_INFO "btrfs: %s checksum verify " |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 302 | "failed on %llu wanted %X found %X " |
| 303 | "level %d\n", |
| 304 | root->fs_info->sb->s_id, |
| 305 | (unsigned long long)buf->start, val, found, |
| 306 | btrfs_header_level(buf)); |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 307 | if (result != (char *)&inline_result) |
| 308 | kfree(result); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 309 | return 1; |
| 310 | } |
| 311 | } else { |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 312 | write_extent_buffer(buf, result, 0, csum_size); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 313 | } |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 314 | if (result != (char *)&inline_result) |
| 315 | kfree(result); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 316 | return 0; |
| 317 | } |
| 318 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 319 | /* |
| 320 | * we can't consider a given block up to date unless the transid of the |
| 321 | * block matches the transid in the parent node's pointer. This is how we |
| 322 | * detect blocks that either didn't get written at all or got written |
| 323 | * in the wrong place. |
| 324 | */ |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 325 | static int verify_parent_transid(struct extent_io_tree *io_tree, |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 326 | struct extent_buffer *eb, u64 parent_transid, |
| 327 | int atomic) |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 328 | { |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 329 | struct extent_state *cached_state = NULL; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 330 | int ret; |
| 331 | |
| 332 | if (!parent_transid || btrfs_header_generation(eb) == parent_transid) |
| 333 | return 0; |
| 334 | |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 335 | if (atomic) |
| 336 | return -EAGAIN; |
| 337 | |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 338 | lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, |
Jeff Mahoney | d008237 | 2012-03-01 14:57:19 +0100 | [diff] [blame] | 339 | 0, &cached_state); |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 340 | if (extent_buffer_uptodate(eb) && |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 341 | btrfs_header_generation(eb) == parent_transid) { |
| 342 | ret = 0; |
| 343 | goto out; |
| 344 | } |
David Sterba | 7a36dde | 2011-05-06 15:33:15 +0200 | [diff] [blame] | 345 | printk_ratelimited("parent transid verify failed on %llu wanted %llu " |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 346 | "found %llu\n", |
| 347 | (unsigned long long)eb->start, |
| 348 | (unsigned long long)parent_transid, |
| 349 | (unsigned long long)btrfs_header_generation(eb)); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 350 | ret = 1; |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 351 | clear_extent_buffer_uptodate(eb); |
Chris Mason | 33958dc | 2008-07-30 10:29:12 -0400 | [diff] [blame] | 352 | out: |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 353 | unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, |
| 354 | &cached_state, GFP_NOFS); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 355 | return ret; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 356 | } |
| 357 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 358 | /* |
| 359 | * helper to read a given tree block, doing retries as required when |
| 360 | * the checksums don't match and we have alternate mirrors to try. |
| 361 | */ |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 362 | static int btree_read_extent_buffer_pages(struct btrfs_root *root, |
| 363 | struct extent_buffer *eb, |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 364 | u64 start, u64 parent_transid) |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 365 | { |
| 366 | struct extent_io_tree *io_tree; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 367 | int failed = 0; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 368 | int ret; |
| 369 | int num_copies = 0; |
| 370 | int mirror_num = 0; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 371 | int failed_mirror = 0; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 372 | |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 373 | clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 374 | io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; |
| 375 | while (1) { |
Arne Jansen | bb82ab8 | 2011-06-10 14:06:53 +0200 | [diff] [blame] | 376 | ret = read_extent_buffer_pages(io_tree, eb, start, |
| 377 | WAIT_COMPLETE, |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 378 | btree_get_extent, mirror_num); |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 379 | if (!ret && !verify_parent_transid(io_tree, eb, |
| 380 | parent_transid, 0)) |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 381 | break; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 382 | |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 383 | /* |
| 384 | * This buffer's crc is fine, but its contents are corrupted, so |
| 385 | * there is no reason to read the other copies, they won't be |
| 386 | * any less wrong. |
| 387 | */ |
| 388 | if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 389 | break; |
| 390 | |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 391 | num_copies = btrfs_num_copies(&root->fs_info->mapping_tree, |
| 392 | eb->start, eb->len); |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 393 | if (num_copies == 1) |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 394 | break; |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 395 | |
Josef Bacik | 5cf1ab5 | 2012-04-16 09:42:26 -0400 | [diff] [blame] | 396 | if (!failed_mirror) { |
| 397 | failed = 1; |
| 398 | failed_mirror = eb->read_mirror; |
| 399 | } |
| 400 | |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 401 | mirror_num++; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 402 | if (mirror_num == failed_mirror) |
| 403 | mirror_num++; |
| 404 | |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 405 | if (mirror_num > num_copies) |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 406 | break; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 407 | } |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 408 | |
| 409 | if (failed && !ret) |
| 410 | repair_eb_io_failure(root, eb, failed_mirror); |
| 411 | |
| 412 | return ret; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 413 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 414 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 415 | /* |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 416 | * checksum a dirty tree block before IO. This has extra checks to make sure |
| 417 | * 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] | 418 | */ |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 419 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 420 | static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 421 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 422 | struct extent_io_tree *tree; |
Chris Mason | 35ebb93 | 2007-10-30 16:56:53 -0400 | [diff] [blame] | 423 | u64 start = (u64)page->index << PAGE_CACHE_SHIFT; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 424 | u64 found_start; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 425 | struct extent_buffer *eb; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 426 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 427 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 428 | |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 429 | eb = (struct extent_buffer *)page->private; |
| 430 | if (page != eb->pages[0]) |
| 431 | return 0; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 432 | found_start = btrfs_header_bytenr(eb); |
| 433 | if (found_start != start) { |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 434 | WARN_ON(1); |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 435 | return 0; |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 436 | } |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 437 | if (eb->pages[0] != page) { |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 438 | WARN_ON(1); |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 439 | return 0; |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 440 | } |
| 441 | if (!PageUptodate(page)) { |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 442 | WARN_ON(1); |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 443 | return 0; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 444 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 445 | csum_tree_block(root, eb, 0); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 446 | return 0; |
| 447 | } |
| 448 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 449 | static int check_tree_block_fsid(struct btrfs_root *root, |
| 450 | struct extent_buffer *eb) |
| 451 | { |
| 452 | struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; |
| 453 | u8 fsid[BTRFS_UUID_SIZE]; |
| 454 | int ret = 1; |
| 455 | |
| 456 | read_extent_buffer(eb, fsid, (unsigned long)btrfs_header_fsid(eb), |
| 457 | BTRFS_FSID_SIZE); |
| 458 | while (fs_devices) { |
| 459 | if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { |
| 460 | ret = 0; |
| 461 | break; |
| 462 | } |
| 463 | fs_devices = fs_devices->seed; |
| 464 | } |
| 465 | return ret; |
| 466 | } |
| 467 | |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 468 | #define CORRUPT(reason, eb, root, slot) \ |
| 469 | printk(KERN_CRIT "btrfs: corrupt leaf, %s: block=%llu," \ |
| 470 | "root=%llu, slot=%d\n", reason, \ |
| 471 | (unsigned long long)btrfs_header_bytenr(eb), \ |
| 472 | (unsigned long long)root->objectid, slot) |
| 473 | |
| 474 | static noinline int check_leaf(struct btrfs_root *root, |
| 475 | struct extent_buffer *leaf) |
| 476 | { |
| 477 | struct btrfs_key key; |
| 478 | struct btrfs_key leaf_key; |
| 479 | u32 nritems = btrfs_header_nritems(leaf); |
| 480 | int slot; |
| 481 | |
| 482 | if (nritems == 0) |
| 483 | return 0; |
| 484 | |
| 485 | /* Check the 0 item */ |
| 486 | if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != |
| 487 | BTRFS_LEAF_DATA_SIZE(root)) { |
| 488 | CORRUPT("invalid item offset size pair", leaf, root, 0); |
| 489 | return -EIO; |
| 490 | } |
| 491 | |
| 492 | /* |
| 493 | * Check to make sure each items keys are in the correct order and their |
| 494 | * offsets make sense. We only have to loop through nritems-1 because |
| 495 | * we check the current slot against the next slot, which verifies the |
| 496 | * next slot's offset+size makes sense and that the current's slot |
| 497 | * offset is correct. |
| 498 | */ |
| 499 | for (slot = 0; slot < nritems - 1; slot++) { |
| 500 | btrfs_item_key_to_cpu(leaf, &leaf_key, slot); |
| 501 | btrfs_item_key_to_cpu(leaf, &key, slot + 1); |
| 502 | |
| 503 | /* Make sure the keys are in the right order */ |
| 504 | if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { |
| 505 | CORRUPT("bad key order", leaf, root, slot); |
| 506 | return -EIO; |
| 507 | } |
| 508 | |
| 509 | /* |
| 510 | * Make sure the offset and ends are right, remember that the |
| 511 | * item data starts at the end of the leaf and grows towards the |
| 512 | * front. |
| 513 | */ |
| 514 | if (btrfs_item_offset_nr(leaf, slot) != |
| 515 | btrfs_item_end_nr(leaf, slot + 1)) { |
| 516 | CORRUPT("slot offset bad", leaf, root, slot); |
| 517 | return -EIO; |
| 518 | } |
| 519 | |
| 520 | /* |
| 521 | * Check to make sure that we don't point outside of the leaf, |
| 522 | * just incase all the items are consistent to eachother, but |
| 523 | * all point outside of the leaf. |
| 524 | */ |
| 525 | if (btrfs_item_end_nr(leaf, slot) > |
| 526 | BTRFS_LEAF_DATA_SIZE(root)) { |
| 527 | CORRUPT("slot end outside of leaf", leaf, root, slot); |
| 528 | return -EIO; |
| 529 | } |
| 530 | } |
| 531 | |
| 532 | return 0; |
| 533 | } |
| 534 | |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 535 | struct extent_buffer *find_eb_for_page(struct extent_io_tree *tree, |
| 536 | struct page *page, int max_walk) |
| 537 | { |
| 538 | struct extent_buffer *eb; |
| 539 | u64 start = page_offset(page); |
| 540 | u64 target = start; |
| 541 | u64 min_start; |
| 542 | |
| 543 | if (start < max_walk) |
| 544 | min_start = 0; |
| 545 | else |
| 546 | min_start = start - max_walk; |
| 547 | |
| 548 | while (start >= min_start) { |
| 549 | eb = find_extent_buffer(tree, start, 0); |
| 550 | if (eb) { |
| 551 | /* |
| 552 | * we found an extent buffer and it contains our page |
| 553 | * horray! |
| 554 | */ |
| 555 | if (eb->start <= target && |
| 556 | eb->start + eb->len > target) |
| 557 | return eb; |
| 558 | |
| 559 | /* we found an extent buffer that wasn't for us */ |
| 560 | free_extent_buffer(eb); |
| 561 | return NULL; |
| 562 | } |
| 563 | if (start == 0) |
| 564 | break; |
| 565 | start -= PAGE_CACHE_SIZE; |
| 566 | } |
| 567 | return NULL; |
| 568 | } |
| 569 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 570 | 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] | 571 | struct extent_state *state, int mirror) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 572 | { |
| 573 | struct extent_io_tree *tree; |
| 574 | u64 found_start; |
| 575 | int found_level; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 576 | struct extent_buffer *eb; |
| 577 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 578 | int ret = 0; |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 579 | int reads_done; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 580 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 581 | if (!page->private) |
| 582 | goto out; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 583 | |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 584 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 585 | eb = (struct extent_buffer *)page->private; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 586 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 587 | /* the pending IO might have been the only thing that kept this buffer |
| 588 | * in memory. Make sure we have a ref for all this other checks |
| 589 | */ |
| 590 | extent_buffer_get(eb); |
| 591 | |
| 592 | reads_done = atomic_dec_and_test(&eb->io_pages); |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 593 | if (!reads_done) |
| 594 | goto err; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 595 | |
Josef Bacik | 5cf1ab5 | 2012-04-16 09:42:26 -0400 | [diff] [blame] | 596 | eb->read_mirror = mirror; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 597 | if (test_bit(EXTENT_BUFFER_IOERR, &eb->bflags)) { |
| 598 | ret = -EIO; |
| 599 | goto err; |
| 600 | } |
| 601 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 602 | found_start = btrfs_header_bytenr(eb); |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 603 | if (found_start != eb->start) { |
David Sterba | 7a36dde | 2011-05-06 15:33:15 +0200 | [diff] [blame] | 604 | printk_ratelimited(KERN_INFO "btrfs bad tree block start " |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 605 | "%llu %llu\n", |
| 606 | (unsigned long long)found_start, |
| 607 | (unsigned long long)eb->start); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 608 | ret = -EIO; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 609 | goto err; |
| 610 | } |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 611 | if (check_tree_block_fsid(root, eb)) { |
David Sterba | 7a36dde | 2011-05-06 15:33:15 +0200 | [diff] [blame] | 612 | printk_ratelimited(KERN_INFO "btrfs bad fsid on block %llu\n", |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 613 | (unsigned long long)eb->start); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 614 | ret = -EIO; |
| 615 | goto err; |
| 616 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 617 | found_level = btrfs_header_level(eb); |
| 618 | |
Chris Mason | 85d4e46 | 2011-07-26 16:11:19 -0400 | [diff] [blame] | 619 | btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), |
| 620 | eb, found_level); |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 621 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 622 | ret = csum_tree_block(root, eb, 1); |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 623 | if (ret) { |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 624 | ret = -EIO; |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame] | 625 | goto err; |
| 626 | } |
| 627 | |
| 628 | /* |
| 629 | * If this is a leaf block and it is corrupt, set the corrupt bit so |
| 630 | * that we don't try and read the other copies of this block, just |
| 631 | * return -EIO. |
| 632 | */ |
| 633 | if (found_level == 0 && check_leaf(root, eb)) { |
| 634 | set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); |
| 635 | ret = -EIO; |
| 636 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 637 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 638 | if (!ret) |
| 639 | set_extent_buffer_uptodate(eb); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 640 | err: |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 641 | if (test_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) { |
| 642 | clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags); |
| 643 | btree_readahead_hook(root, eb, eb->start, ret); |
| 644 | } |
| 645 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 646 | if (ret) |
| 647 | clear_extent_buffer_uptodate(eb); |
| 648 | free_extent_buffer(eb); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 649 | out: |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 650 | return ret; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 651 | } |
| 652 | |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 653 | static int btree_io_failed_hook(struct page *page, int failed_mirror) |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 654 | { |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 655 | struct extent_buffer *eb; |
| 656 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
| 657 | |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 658 | eb = (struct extent_buffer *)page->private; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 659 | set_bit(EXTENT_BUFFER_IOERR, &eb->bflags); |
Josef Bacik | 5cf1ab5 | 2012-04-16 09:42:26 -0400 | [diff] [blame] | 660 | eb->read_mirror = failed_mirror; |
Josef Bacik | ea46679 | 2012-03-26 21:57:36 -0400 | [diff] [blame] | 661 | if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 662 | btree_readahead_hook(root, eb, eb->start, -EIO); |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 663 | return -EIO; /* we fixed nothing */ |
| 664 | } |
| 665 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 666 | static void end_workqueue_bio(struct bio *bio, int err) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 667 | { |
| 668 | struct end_io_wq *end_io_wq = bio->bi_private; |
| 669 | struct btrfs_fs_info *fs_info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 670 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 671 | fs_info = end_io_wq->info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 672 | end_io_wq->error = err; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 673 | end_io_wq->work.func = end_workqueue_fn; |
| 674 | end_io_wq->work.flags = 0; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 675 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 676 | if (bio->bi_rw & REQ_WRITE) { |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 677 | if (end_io_wq->metadata == 1) |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 678 | btrfs_queue_worker(&fs_info->endio_meta_write_workers, |
| 679 | &end_io_wq->work); |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 680 | else if (end_io_wq->metadata == 2) |
| 681 | btrfs_queue_worker(&fs_info->endio_freespace_worker, |
| 682 | &end_io_wq->work); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 683 | else |
| 684 | btrfs_queue_worker(&fs_info->endio_write_workers, |
| 685 | &end_io_wq->work); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 686 | } else { |
| 687 | if (end_io_wq->metadata) |
| 688 | btrfs_queue_worker(&fs_info->endio_meta_workers, |
| 689 | &end_io_wq->work); |
| 690 | else |
| 691 | btrfs_queue_worker(&fs_info->endio_workers, |
| 692 | &end_io_wq->work); |
| 693 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 694 | } |
| 695 | |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 696 | /* |
| 697 | * For the metadata arg you want |
| 698 | * |
| 699 | * 0 - if data |
| 700 | * 1 - if normal metadta |
| 701 | * 2 - if writing to the free space cache area |
| 702 | */ |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 703 | int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, |
| 704 | int metadata) |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 705 | { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 706 | struct end_io_wq *end_io_wq; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 707 | end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); |
| 708 | if (!end_io_wq) |
| 709 | return -ENOMEM; |
| 710 | |
| 711 | end_io_wq->private = bio->bi_private; |
| 712 | end_io_wq->end_io = bio->bi_end_io; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 713 | end_io_wq->info = info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 714 | end_io_wq->error = 0; |
| 715 | end_io_wq->bio = bio; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 716 | end_io_wq->metadata = metadata; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 717 | |
| 718 | bio->bi_private = end_io_wq; |
| 719 | bio->bi_end_io = end_workqueue_bio; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 720 | return 0; |
| 721 | } |
| 722 | |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 723 | unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 724 | { |
| 725 | unsigned long limit = min_t(unsigned long, |
| 726 | info->workers.max_workers, |
| 727 | info->fs_devices->open_devices); |
| 728 | return 256 * limit; |
| 729 | } |
| 730 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 731 | static void run_one_async_start(struct btrfs_work *work) |
| 732 | { |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 733 | struct async_submit_bio *async; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 734 | int ret; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 735 | |
| 736 | async = container_of(work, struct async_submit_bio, work); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 737 | ret = async->submit_bio_start(async->inode, async->rw, async->bio, |
| 738 | async->mirror_num, async->bio_flags, |
| 739 | async->bio_offset); |
| 740 | if (ret) |
| 741 | async->error = ret; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 742 | } |
| 743 | |
| 744 | static void run_one_async_done(struct btrfs_work *work) |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 745 | { |
| 746 | struct btrfs_fs_info *fs_info; |
| 747 | struct async_submit_bio *async; |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 748 | int limit; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 749 | |
| 750 | async = container_of(work, struct async_submit_bio, work); |
| 751 | fs_info = BTRFS_I(async->inode)->root->fs_info; |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 752 | |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 753 | limit = btrfs_async_submit_limit(fs_info); |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 754 | limit = limit * 2 / 3; |
| 755 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 756 | atomic_dec(&fs_info->nr_async_submits); |
Chris Mason | 0986fe9e | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 757 | |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 758 | if (atomic_read(&fs_info->nr_async_submits) < limit && |
| 759 | waitqueue_active(&fs_info->async_submit_wait)) |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 760 | wake_up(&fs_info->async_submit_wait); |
| 761 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 762 | /* If an error occured we just want to clean up the bio and move on */ |
| 763 | if (async->error) { |
| 764 | bio_endio(async->bio, async->error); |
| 765 | return; |
| 766 | } |
| 767 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 768 | async->submit_bio_done(async->inode, async->rw, async->bio, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 769 | async->mirror_num, async->bio_flags, |
| 770 | async->bio_offset); |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 771 | } |
| 772 | |
| 773 | static void run_one_async_free(struct btrfs_work *work) |
| 774 | { |
| 775 | struct async_submit_bio *async; |
| 776 | |
| 777 | async = container_of(work, struct async_submit_bio, work); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 778 | kfree(async); |
| 779 | } |
| 780 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 781 | int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, |
| 782 | int rw, struct bio *bio, int mirror_num, |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 783 | unsigned long bio_flags, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 784 | u64 bio_offset, |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 785 | extent_submit_bio_hook_t *submit_bio_start, |
| 786 | extent_submit_bio_hook_t *submit_bio_done) |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 787 | { |
| 788 | struct async_submit_bio *async; |
| 789 | |
| 790 | async = kmalloc(sizeof(*async), GFP_NOFS); |
| 791 | if (!async) |
| 792 | return -ENOMEM; |
| 793 | |
| 794 | async->inode = inode; |
| 795 | async->rw = rw; |
| 796 | async->bio = bio; |
| 797 | async->mirror_num = mirror_num; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 798 | async->submit_bio_start = submit_bio_start; |
| 799 | async->submit_bio_done = submit_bio_done; |
| 800 | |
| 801 | async->work.func = run_one_async_start; |
| 802 | async->work.ordered_func = run_one_async_done; |
| 803 | async->work.ordered_free = run_one_async_free; |
| 804 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 805 | async->work.flags = 0; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 806 | async->bio_flags = bio_flags; |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 807 | async->bio_offset = bio_offset; |
Chris Mason | 8c8bee1 | 2008-09-29 11:19:10 -0400 | [diff] [blame] | 808 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 809 | async->error = 0; |
| 810 | |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 811 | atomic_inc(&fs_info->nr_async_submits); |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 812 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 813 | if (rw & REQ_SYNC) |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 814 | btrfs_set_work_high_prio(&async->work); |
| 815 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 816 | btrfs_queue_worker(&fs_info->workers, &async->work); |
Chris Mason | 9473f16 | 2008-08-28 06:15:24 -0400 | [diff] [blame] | 817 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 818 | while (atomic_read(&fs_info->async_submit_draining) && |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 819 | atomic_read(&fs_info->nr_async_submits)) { |
| 820 | wait_event(fs_info->async_submit_wait, |
| 821 | (atomic_read(&fs_info->nr_async_submits) == 0)); |
| 822 | } |
| 823 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 824 | return 0; |
| 825 | } |
| 826 | |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 827 | static int btree_csum_one_bio(struct bio *bio) |
| 828 | { |
| 829 | struct bio_vec *bvec = bio->bi_io_vec; |
| 830 | int bio_index = 0; |
| 831 | struct btrfs_root *root; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 832 | int ret = 0; |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 833 | |
| 834 | WARN_ON(bio->bi_vcnt <= 0); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 835 | while (bio_index < bio->bi_vcnt) { |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 836 | root = BTRFS_I(bvec->bv_page->mapping->host)->root; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 837 | ret = csum_dirty_buffer(root, bvec->bv_page); |
| 838 | if (ret) |
| 839 | break; |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 840 | bio_index++; |
| 841 | bvec++; |
| 842 | } |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 843 | return ret; |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 844 | } |
| 845 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 846 | static int __btree_submit_bio_start(struct inode *inode, int rw, |
| 847 | struct bio *bio, int mirror_num, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 848 | unsigned long bio_flags, |
| 849 | u64 bio_offset) |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 850 | { |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 851 | /* |
| 852 | * 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] | 853 | * submission context. Just jump into btrfs_map_bio |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 854 | */ |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 855 | return btree_csum_one_bio(bio); |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 856 | } |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 857 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 858 | 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] | 859 | int mirror_num, unsigned long bio_flags, |
| 860 | u64 bio_offset) |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 861 | { |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 862 | /* |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 863 | * when we're called for a write, we're already in the async |
| 864 | * submission context. Just jump into btrfs_map_bio |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 865 | */ |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 866 | return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 867 | } |
| 868 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 869 | 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] | 870 | int mirror_num, unsigned long bio_flags, |
| 871 | u64 bio_offset) |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 872 | { |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 873 | int ret; |
| 874 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 875 | if (!(rw & REQ_WRITE)) { |
Chris Mason | f3f266a | 2012-03-23 10:22:46 -0400 | [diff] [blame] | 876 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 877 | /* |
| 878 | * called for a read, do the setup so that checksum validation |
| 879 | * can happen in the async kernel threads |
| 880 | */ |
Chris Mason | f3f266a | 2012-03-23 10:22:46 -0400 | [diff] [blame] | 881 | ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, |
| 882 | bio, 1); |
Chris Mason | 1d4284b | 2012-03-28 20:31:37 -0400 | [diff] [blame] | 883 | if (ret) |
| 884 | return ret; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 885 | return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, |
Chris Mason | 6f3577b | 2008-11-13 09:59:36 -0500 | [diff] [blame] | 886 | mirror_num, 0); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 887 | } |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 888 | |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 889 | /* |
| 890 | * kthread helpers are used to submit writes so that checksumming |
| 891 | * can happen in parallel across all CPUs |
| 892 | */ |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 893 | return btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 894 | inode, rw, bio, mirror_num, 0, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 895 | bio_offset, |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 896 | __btree_submit_bio_start, |
| 897 | __btree_submit_bio_done); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 898 | } |
| 899 | |
Jan Beulich | 3dd1462 | 2010-12-07 14:54:09 +0000 | [diff] [blame] | 900 | #ifdef CONFIG_MIGRATION |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 901 | static int btree_migratepage(struct address_space *mapping, |
Mel Gorman | a6bc32b | 2012-01-12 17:19:43 -0800 | [diff] [blame] | 902 | struct page *newpage, struct page *page, |
| 903 | enum migrate_mode mode) |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 904 | { |
| 905 | /* |
| 906 | * we can't safely write a btree page from here, |
| 907 | * we haven't done the locking hook |
| 908 | */ |
| 909 | if (PageDirty(page)) |
| 910 | return -EAGAIN; |
| 911 | /* |
| 912 | * Buffers may be managed in a filesystem specific way. |
| 913 | * We must have no buffers or drop them. |
| 914 | */ |
| 915 | if (page_has_private(page) && |
| 916 | !try_to_release_page(page, GFP_KERNEL)) |
| 917 | return -EAGAIN; |
Mel Gorman | a6bc32b | 2012-01-12 17:19:43 -0800 | [diff] [blame] | 918 | return migrate_page(mapping, newpage, page, mode); |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 919 | } |
Jan Beulich | 3dd1462 | 2010-12-07 14:54:09 +0000 | [diff] [blame] | 920 | #endif |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 921 | |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 922 | |
| 923 | static int btree_writepages(struct address_space *mapping, |
| 924 | struct writeback_control *wbc) |
| 925 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 926 | struct extent_io_tree *tree; |
| 927 | tree = &BTRFS_I(mapping->host)->io_tree; |
Chris Mason | d8d5f3e | 2007-12-11 12:42:00 -0500 | [diff] [blame] | 928 | if (wbc->sync_mode == WB_SYNC_NONE) { |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 929 | struct btrfs_root *root = BTRFS_I(mapping->host)->root; |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 930 | u64 num_dirty; |
Chris Mason | 24ab9cd | 2008-09-24 14:51:30 -0400 | [diff] [blame] | 931 | unsigned long thresh = 32 * 1024 * 1024; |
Chris Mason | 448d640 | 2007-11-27 07:52:01 -0800 | [diff] [blame] | 932 | |
| 933 | if (wbc->for_kupdate) |
| 934 | return 0; |
| 935 | |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 936 | /* this is a bit racy, but that's ok */ |
| 937 | num_dirty = root->fs_info->dirty_metadata_bytes; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 938 | if (num_dirty < thresh) |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 939 | return 0; |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 940 | } |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 941 | return btree_write_cache_pages(mapping, wbc); |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 942 | } |
| 943 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 944 | static int btree_readpage(struct file *file, struct page *page) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 945 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 946 | struct extent_io_tree *tree; |
| 947 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Jan Schmidt | 8ddc7d9 | 2011-06-13 20:02:58 +0200 | [diff] [blame] | 948 | return extent_read_full_page(tree, page, btree_get_extent, 0); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 949 | } |
| 950 | |
Chris Mason | 70dec80 | 2008-01-29 09:59:12 -0500 | [diff] [blame] | 951 | static int btree_releasepage(struct page *page, gfp_t gfp_flags) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 952 | { |
Chris Mason | 98509cf | 2008-09-11 15:51:43 -0400 | [diff] [blame] | 953 | if (PageWriteback(page) || PageDirty(page)) |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 954 | return 0; |
David Sterba | 0c4e538 | 2012-01-26 15:01:12 -0500 | [diff] [blame] | 955 | /* |
| 956 | * We need to mask out eg. __GFP_HIGHMEM and __GFP_DMA32 as we're doing |
| 957 | * slab allocation from alloc_extent_state down the callchain where |
| 958 | * it'd hit a BUG_ON as those flags are not allowed. |
| 959 | */ |
| 960 | gfp_flags &= ~GFP_SLAB_BUG_MASK; |
| 961 | |
Josef Bacik | 3083ee2 | 2012-03-09 16:01:49 -0500 | [diff] [blame] | 962 | return try_release_extent_buffer(page, gfp_flags); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 963 | } |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 964 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 965 | static void btree_invalidatepage(struct page *page, unsigned long offset) |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 966 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 967 | struct extent_io_tree *tree; |
| 968 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 969 | extent_invalidatepage(tree, page, offset); |
| 970 | btree_releasepage(page, GFP_NOFS); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 971 | if (PagePrivate(page)) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 972 | printk(KERN_WARNING "btrfs warning page private not zero " |
| 973 | "on page %llu\n", (unsigned long long)page_offset(page)); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 974 | ClearPagePrivate(page); |
| 975 | set_page_private(page, 0); |
| 976 | page_cache_release(page); |
| 977 | } |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 978 | } |
| 979 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 980 | static int btree_set_page_dirty(struct page *page) |
| 981 | { |
| 982 | struct extent_buffer *eb; |
| 983 | |
| 984 | BUG_ON(!PagePrivate(page)); |
| 985 | eb = (struct extent_buffer *)page->private; |
| 986 | BUG_ON(!eb); |
| 987 | BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); |
| 988 | BUG_ON(!atomic_read(&eb->refs)); |
| 989 | btrfs_assert_tree_locked(eb); |
| 990 | return __set_page_dirty_nobuffers(page); |
| 991 | } |
| 992 | |
Alexey Dobriyan | 7f09410 | 2009-09-21 17:01:10 -0700 | [diff] [blame] | 993 | static const struct address_space_operations btree_aops = { |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 994 | .readpage = btree_readpage, |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 995 | .writepages = btree_writepages, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 996 | .releasepage = btree_releasepage, |
| 997 | .invalidatepage = btree_invalidatepage, |
Chris Mason | 5a92bc8 | 2010-11-29 09:49:11 -0500 | [diff] [blame] | 998 | #ifdef CONFIG_MIGRATION |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 999 | .migratepage = btree_migratepage, |
Chris Mason | 5a92bc8 | 2010-11-29 09:49:11 -0500 | [diff] [blame] | 1000 | #endif |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1001 | .set_page_dirty = btree_set_page_dirty, |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1002 | }; |
| 1003 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 1004 | int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, |
| 1005 | u64 parent_transid) |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 1006 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1007 | struct extent_buffer *buf = NULL; |
| 1008 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 1009 | int ret = 0; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 1010 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1011 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1012 | if (!buf) |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 1013 | return 0; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1014 | read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, |
Arne Jansen | bb82ab8 | 2011-06-10 14:06:53 +0200 | [diff] [blame] | 1015 | buf, 0, WAIT_NONE, btree_get_extent, 0); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1016 | free_extent_buffer(buf); |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 1017 | return ret; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 1018 | } |
| 1019 | |
Arne Jansen | ab0fff0 | 2011-05-23 14:25:41 +0200 | [diff] [blame] | 1020 | int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, |
| 1021 | int mirror_num, struct extent_buffer **eb) |
| 1022 | { |
| 1023 | struct extent_buffer *buf = NULL; |
| 1024 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 1025 | struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; |
| 1026 | int ret; |
| 1027 | |
| 1028 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
| 1029 | if (!buf) |
| 1030 | return 0; |
| 1031 | |
| 1032 | set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); |
| 1033 | |
| 1034 | ret = read_extent_buffer_pages(io_tree, buf, 0, WAIT_PAGE_LOCK, |
| 1035 | btree_get_extent, mirror_num); |
| 1036 | if (ret) { |
| 1037 | free_extent_buffer(buf); |
| 1038 | return ret; |
| 1039 | } |
| 1040 | |
| 1041 | if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { |
| 1042 | free_extent_buffer(buf); |
| 1043 | return -EIO; |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1044 | } else if (extent_buffer_uptodate(buf)) { |
Arne Jansen | ab0fff0 | 2011-05-23 14:25:41 +0200 | [diff] [blame] | 1045 | *eb = buf; |
| 1046 | } else { |
| 1047 | free_extent_buffer(buf); |
| 1048 | } |
| 1049 | return 0; |
| 1050 | } |
| 1051 | |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 1052 | struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, |
| 1053 | u64 bytenr, u32 blocksize) |
| 1054 | { |
| 1055 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 1056 | struct extent_buffer *eb; |
| 1057 | eb = find_extent_buffer(&BTRFS_I(btree_inode)->io_tree, |
David Sterba | f09d1f6 | 2011-04-21 01:08:01 +0200 | [diff] [blame] | 1058 | bytenr, blocksize); |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 1059 | return eb; |
| 1060 | } |
| 1061 | |
| 1062 | struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, |
| 1063 | u64 bytenr, u32 blocksize) |
| 1064 | { |
| 1065 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 1066 | struct extent_buffer *eb; |
| 1067 | |
| 1068 | eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree, |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 1069 | bytenr, blocksize); |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 1070 | return eb; |
| 1071 | } |
| 1072 | |
| 1073 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1074 | int btrfs_write_tree_block(struct extent_buffer *buf) |
| 1075 | { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 1076 | return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, |
Christoph Hellwig | 8aa38c3 | 2009-10-01 12:58:30 -0400 | [diff] [blame] | 1077 | buf->start + buf->len - 1); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1078 | } |
| 1079 | |
| 1080 | int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) |
| 1081 | { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 1082 | return filemap_fdatawait_range(buf->pages[0]->mapping, |
Christoph Hellwig | 8aa38c3 | 2009-10-01 12:58:30 -0400 | [diff] [blame] | 1083 | buf->start, buf->start + buf->len - 1); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1084 | } |
| 1085 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1086 | struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 1087 | u32 blocksize, u64 parent_transid) |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1088 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1089 | struct extent_buffer *buf = NULL; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1090 | int ret; |
| 1091 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1092 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1093 | if (!buf) |
| 1094 | return NULL; |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 1095 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 1096 | ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1097 | return buf; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1098 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1099 | } |
| 1100 | |
Jeff Mahoney | d5c13f9 | 2012-03-01 14:56:27 +0100 | [diff] [blame] | 1101 | void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 1102 | struct extent_buffer *buf) |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 1103 | { |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 1104 | if (btrfs_header_generation(buf) == |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1105 | root->fs_info->running_transaction->transid) { |
Chris Mason | b9447ef | 2009-03-09 11:45:38 -0400 | [diff] [blame] | 1106 | btrfs_assert_tree_locked(buf); |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 1107 | |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 1108 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { |
| 1109 | spin_lock(&root->fs_info->delalloc_lock); |
| 1110 | if (root->fs_info->dirty_metadata_bytes >= buf->len) |
| 1111 | root->fs_info->dirty_metadata_bytes -= buf->len; |
Jeff Mahoney | d5c13f9 | 2012-03-01 14:56:27 +0100 | [diff] [blame] | 1112 | else { |
| 1113 | spin_unlock(&root->fs_info->delalloc_lock); |
| 1114 | btrfs_panic(root->fs_info, -EOVERFLOW, |
| 1115 | "Can't clear %lu bytes from " |
| 1116 | " dirty_mdatadata_bytes (%lu)", |
| 1117 | buf->len, |
| 1118 | root->fs_info->dirty_metadata_bytes); |
| 1119 | } |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 1120 | spin_unlock(&root->fs_info->delalloc_lock); |
| 1121 | } |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 1122 | |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 1123 | /* ugh, clear_extent_buffer_dirty needs to lock the page */ |
| 1124 | btrfs_set_lock_blocking(buf); |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1125 | clear_extent_buffer_dirty(buf); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1126 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1127 | } |
| 1128 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 1129 | static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, |
| 1130 | u32 stripesize, struct btrfs_root *root, |
| 1131 | struct btrfs_fs_info *fs_info, |
| 1132 | u64 objectid) |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 1133 | { |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 1134 | root->node = NULL; |
Chris Mason | a28ec19 | 2007-03-06 20:08:01 -0500 | [diff] [blame] | 1135 | root->commit_root = NULL; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1136 | root->sectorsize = sectorsize; |
| 1137 | root->nodesize = nodesize; |
| 1138 | root->leafsize = leafsize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1139 | root->stripesize = stripesize; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 1140 | root->ref_cows = 0; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1141 | root->track_dirty = 0; |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 1142 | root->in_radix = 0; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1143 | root->orphan_item_inserted = 0; |
| 1144 | root->orphan_cleanup_state = 0; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1145 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1146 | root->objectid = objectid; |
| 1147 | root->last_trans = 0; |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1148 | root->highest_objectid = 0; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1149 | root->name = NULL; |
Eric Paris | 6bef4d3 | 2010-02-23 19:43:04 +0000 | [diff] [blame] | 1150 | root->inode_tree = RB_ROOT; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 1151 | INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1152 | root->block_rsv = NULL; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1153 | root->orphan_block_rsv = NULL; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1154 | |
| 1155 | INIT_LIST_HEAD(&root->dirty_list); |
Josef Bacik | 7b12876 | 2008-07-24 12:17:14 -0400 | [diff] [blame] | 1156 | INIT_LIST_HEAD(&root->orphan_list); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1157 | INIT_LIST_HEAD(&root->root_list); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1158 | spin_lock_init(&root->orphan_lock); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1159 | spin_lock_init(&root->inode_lock); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1160 | spin_lock_init(&root->accounting_lock); |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1161 | mutex_init(&root->objectid_mutex); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1162 | mutex_init(&root->log_mutex); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1163 | init_waitqueue_head(&root->log_writer_wait); |
| 1164 | init_waitqueue_head(&root->log_commit_wait[0]); |
| 1165 | init_waitqueue_head(&root->log_commit_wait[1]); |
| 1166 | atomic_set(&root->log_commit[0], 0); |
| 1167 | atomic_set(&root->log_commit[1], 0); |
| 1168 | atomic_set(&root->log_writers, 0); |
| 1169 | root->log_batch = 0; |
| 1170 | root->log_transid = 0; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 1171 | root->last_log_commit = 0; |
Chris Mason | d0c803c | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 1172 | extent_io_tree_init(&root->dirty_log_pages, |
David Sterba | f993c88 | 2011-04-20 23:35:57 +0200 | [diff] [blame] | 1173 | fs_info->btree_inode->i_mapping); |
Chris Mason | 017e536 | 2008-07-28 15:32:51 -0400 | [diff] [blame] | 1174 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1175 | memset(&root->root_key, 0, sizeof(root->root_key)); |
| 1176 | memset(&root->root_item, 0, sizeof(root->root_item)); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 1177 | memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1178 | memset(&root->root_kobj, 0, sizeof(root->root_kobj)); |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1179 | root->defrag_trans_start = fs_info->generation; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1180 | init_completion(&root->kobj_unregister); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 1181 | root->defrag_running = 0; |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 1182 | root->root_key.objectid = objectid; |
Al Viro | 0ee5dc6 | 2011-07-07 15:44:25 -0400 | [diff] [blame] | 1183 | root->anon_dev = 0; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1184 | } |
| 1185 | |
Jeff Mahoney | 200a5c1 | 2011-10-03 23:22:43 -0400 | [diff] [blame] | 1186 | static int __must_check find_and_setup_root(struct btrfs_root *tree_root, |
| 1187 | struct btrfs_fs_info *fs_info, |
| 1188 | u64 objectid, |
| 1189 | struct btrfs_root *root) |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1190 | { |
| 1191 | int ret; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1192 | u32 blocksize; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1193 | u64 generation; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1194 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1195 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1196 | tree_root->sectorsize, tree_root->stripesize, |
| 1197 | root, fs_info, objectid); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1198 | ret = btrfs_find_last_root(tree_root, objectid, |
| 1199 | &root->root_item, &root->root_key); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1200 | if (ret > 0) |
| 1201 | return -ENOENT; |
Jeff Mahoney | 200a5c1 | 2011-10-03 23:22:43 -0400 | [diff] [blame] | 1202 | else if (ret < 0) |
| 1203 | return ret; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1204 | |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1205 | generation = btrfs_root_generation(&root->root_item); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1206 | blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1207 | root->commit_root = NULL; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1208 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1209 | blocksize, generation); |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 1210 | if (!root->node || !btrfs_buffer_uptodate(root->node, generation, 0)) { |
Chris Mason | 68433b7 | 2010-12-13 14:47:58 -0500 | [diff] [blame] | 1211 | free_extent_buffer(root->node); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1212 | root->node = NULL; |
Chris Mason | 68433b7 | 2010-12-13 14:47:58 -0500 | [diff] [blame] | 1213 | return -EIO; |
| 1214 | } |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1215 | root->commit_root = btrfs_root_node(root); |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 1216 | return 0; |
| 1217 | } |
| 1218 | |
Al Viro | f84a8bd | 2011-11-17 15:57:57 -0500 | [diff] [blame] | 1219 | 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] | 1220 | { |
| 1221 | struct btrfs_root *root = kzalloc(sizeof(*root), GFP_NOFS); |
| 1222 | if (root) |
| 1223 | root->fs_info = fs_info; |
| 1224 | return root; |
| 1225 | } |
| 1226 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1227 | static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, |
| 1228 | struct btrfs_fs_info *fs_info) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1229 | { |
| 1230 | struct btrfs_root *root; |
| 1231 | struct btrfs_root *tree_root = fs_info->tree_root; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1232 | struct extent_buffer *leaf; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1233 | |
Al Viro | 6f07e42 | 2011-11-17 00:46:16 -0500 | [diff] [blame] | 1234 | root = btrfs_alloc_root(fs_info); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1235 | if (!root) |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1236 | return ERR_PTR(-ENOMEM); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1237 | |
| 1238 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
| 1239 | tree_root->sectorsize, tree_root->stripesize, |
| 1240 | root, fs_info, BTRFS_TREE_LOG_OBJECTID); |
| 1241 | |
| 1242 | root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; |
| 1243 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; |
| 1244 | root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1245 | /* |
| 1246 | * log trees do not get reference counted because they go away |
| 1247 | * before a real commit is actually done. They do store pointers |
| 1248 | * to file data extents, and those reference counts still get |
| 1249 | * updated (along with back refs to the log tree). |
| 1250 | */ |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1251 | root->ref_cows = 0; |
| 1252 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1253 | leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, |
Arne Jansen | 66d7e7f | 2011-09-12 15:26:38 +0200 | [diff] [blame] | 1254 | BTRFS_TREE_LOG_OBJECTID, NULL, |
| 1255 | 0, 0, 0, 0); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1256 | if (IS_ERR(leaf)) { |
| 1257 | kfree(root); |
| 1258 | return ERR_CAST(leaf); |
| 1259 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1260 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1261 | memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); |
| 1262 | btrfs_set_header_bytenr(leaf, leaf->start); |
| 1263 | btrfs_set_header_generation(leaf, trans->transid); |
| 1264 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); |
| 1265 | btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1266 | root->node = leaf; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1267 | |
| 1268 | write_extent_buffer(root->node, root->fs_info->fsid, |
| 1269 | (unsigned long)btrfs_header_fsid(root->node), |
| 1270 | BTRFS_FSID_SIZE); |
| 1271 | btrfs_mark_buffer_dirty(root->node); |
| 1272 | btrfs_tree_unlock(root->node); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1273 | return root; |
| 1274 | } |
| 1275 | |
| 1276 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, |
| 1277 | struct btrfs_fs_info *fs_info) |
| 1278 | { |
| 1279 | struct btrfs_root *log_root; |
| 1280 | |
| 1281 | log_root = alloc_log_tree(trans, fs_info); |
| 1282 | if (IS_ERR(log_root)) |
| 1283 | return PTR_ERR(log_root); |
| 1284 | WARN_ON(fs_info->log_root_tree); |
| 1285 | fs_info->log_root_tree = log_root; |
| 1286 | return 0; |
| 1287 | } |
| 1288 | |
| 1289 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, |
| 1290 | struct btrfs_root *root) |
| 1291 | { |
| 1292 | struct btrfs_root *log_root; |
| 1293 | struct btrfs_inode_item *inode_item; |
| 1294 | |
| 1295 | log_root = alloc_log_tree(trans, root->fs_info); |
| 1296 | if (IS_ERR(log_root)) |
| 1297 | return PTR_ERR(log_root); |
| 1298 | |
| 1299 | log_root->last_trans = trans->transid; |
| 1300 | log_root->root_key.offset = root->root_key.objectid; |
| 1301 | |
| 1302 | inode_item = &log_root->root_item.inode; |
| 1303 | inode_item->generation = cpu_to_le64(1); |
| 1304 | inode_item->size = cpu_to_le64(3); |
| 1305 | inode_item->nlink = cpu_to_le32(1); |
| 1306 | inode_item->nbytes = cpu_to_le64(root->leafsize); |
| 1307 | inode_item->mode = cpu_to_le32(S_IFDIR | 0755); |
| 1308 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1309 | btrfs_set_root_node(&log_root->root_item, log_root->node); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1310 | |
| 1311 | WARN_ON(root->log_root); |
| 1312 | root->log_root = log_root; |
| 1313 | root->log_transid = 0; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 1314 | root->last_log_commit = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1315 | return 0; |
| 1316 | } |
| 1317 | |
| 1318 | struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, |
| 1319 | struct btrfs_key *location) |
| 1320 | { |
| 1321 | struct btrfs_root *root; |
| 1322 | struct btrfs_fs_info *fs_info = tree_root->fs_info; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1323 | struct btrfs_path *path; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1324 | struct extent_buffer *l; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1325 | u64 generation; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1326 | u32 blocksize; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1327 | int ret = 0; |
| 1328 | |
Al Viro | 6f07e42 | 2011-11-17 00:46:16 -0500 | [diff] [blame] | 1329 | root = btrfs_alloc_root(fs_info); |
Chris Mason | 0cf6c62 | 2007-06-09 09:22:25 -0400 | [diff] [blame] | 1330 | if (!root) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1331 | return ERR_PTR(-ENOMEM); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1332 | if (location->offset == (u64)-1) { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1333 | ret = find_and_setup_root(tree_root, fs_info, |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1334 | location->objectid, root); |
| 1335 | if (ret) { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1336 | kfree(root); |
| 1337 | return ERR_PTR(ret); |
| 1338 | } |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1339 | goto out; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1340 | } |
| 1341 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1342 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1343 | tree_root->sectorsize, tree_root->stripesize, |
| 1344 | root, fs_info, location->objectid); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1345 | |
| 1346 | path = btrfs_alloc_path(); |
Tsutomu Itoh | db5b493 | 2011-03-23 08:14:16 +0000 | [diff] [blame] | 1347 | if (!path) { |
| 1348 | kfree(root); |
| 1349 | return ERR_PTR(-ENOMEM); |
| 1350 | } |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1351 | ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1352 | if (ret == 0) { |
| 1353 | l = path->nodes[0]; |
| 1354 | read_extent_buffer(l, &root->root_item, |
| 1355 | btrfs_item_ptr_offset(l, path->slots[0]), |
| 1356 | sizeof(root->root_item)); |
| 1357 | memcpy(&root->root_key, location, sizeof(*location)); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1358 | } |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1359 | btrfs_free_path(path); |
| 1360 | if (ret) { |
Tsutomu Itoh | 5e540f7 | 2010-12-27 06:53:10 +0000 | [diff] [blame] | 1361 | kfree(root); |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1362 | if (ret > 0) |
| 1363 | ret = -ENOENT; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1364 | return ERR_PTR(ret); |
| 1365 | } |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1366 | |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1367 | generation = btrfs_root_generation(&root->root_item); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1368 | blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); |
| 1369 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1370 | blocksize, generation); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1371 | root->commit_root = btrfs_root_node(root); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 1372 | BUG_ON(!root->node); /* -ENOMEM */ |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1373 | out: |
Li Zefan | 08fe4db | 2011-03-28 02:01:25 +0000 | [diff] [blame] | 1374 | if (location->objectid != BTRFS_TREE_LOG_OBJECTID) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1375 | root->ref_cows = 1; |
Li Zefan | 08fe4db | 2011-03-28 02:01:25 +0000 | [diff] [blame] | 1376 | btrfs_check_and_init_root_item(&root->root_item); |
| 1377 | } |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1378 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1379 | return root; |
| 1380 | } |
| 1381 | |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1382 | struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, |
| 1383 | struct btrfs_key *location) |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1384 | { |
| 1385 | struct btrfs_root *root; |
| 1386 | int ret; |
| 1387 | |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1388 | if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) |
| 1389 | return fs_info->tree_root; |
| 1390 | if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) |
| 1391 | return fs_info->extent_root; |
Chris Mason | 8f18cf1 | 2008-04-25 16:53:30 -0400 | [diff] [blame] | 1392 | if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) |
| 1393 | return fs_info->chunk_root; |
| 1394 | if (location->objectid == BTRFS_DEV_TREE_OBJECTID) |
| 1395 | return fs_info->dev_root; |
Yan Zheng | 0403e47 | 2008-12-10 20:32:51 -0500 | [diff] [blame] | 1396 | if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) |
| 1397 | return fs_info->csum_root; |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1398 | again: |
| 1399 | spin_lock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1400 | root = radix_tree_lookup(&fs_info->fs_roots_radix, |
| 1401 | (unsigned long)location->objectid); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1402 | spin_unlock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1403 | if (root) |
| 1404 | return root; |
| 1405 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1406 | root = btrfs_read_fs_root_no_radix(fs_info->tree_root, location); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1407 | if (IS_ERR(root)) |
| 1408 | return root; |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 1409 | |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 1410 | root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 1411 | root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), |
| 1412 | GFP_NOFS); |
David Sterba | 35a30d7 | 2011-06-13 15:18:23 +0000 | [diff] [blame] | 1413 | if (!root->free_ino_pinned || !root->free_ino_ctl) { |
| 1414 | ret = -ENOMEM; |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 1415 | goto fail; |
David Sterba | 35a30d7 | 2011-06-13 15:18:23 +0000 | [diff] [blame] | 1416 | } |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 1417 | |
| 1418 | btrfs_init_free_ino_ctl(root); |
| 1419 | mutex_init(&root->fs_commit_mutex); |
| 1420 | spin_lock_init(&root->cache_lock); |
| 1421 | init_waitqueue_head(&root->cache_wait); |
| 1422 | |
Al Viro | 0ee5dc6 | 2011-07-07 15:44:25 -0400 | [diff] [blame] | 1423 | ret = get_anon_bdev(&root->anon_dev); |
Chris Mason | ac08aed | 2011-06-13 11:28:50 -0400 | [diff] [blame] | 1424 | if (ret) |
| 1425 | goto fail; |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 1426 | |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1427 | if (btrfs_root_refs(&root->root_item) == 0) { |
| 1428 | ret = -ENOENT; |
| 1429 | goto fail; |
| 1430 | } |
| 1431 | |
| 1432 | ret = btrfs_find_orphan_item(fs_info->tree_root, location->objectid); |
| 1433 | if (ret < 0) |
| 1434 | goto fail; |
| 1435 | if (ret == 0) |
| 1436 | root->orphan_item_inserted = 1; |
| 1437 | |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1438 | ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); |
| 1439 | if (ret) |
| 1440 | goto fail; |
| 1441 | |
| 1442 | spin_lock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 1443 | ret = radix_tree_insert(&fs_info->fs_roots_radix, |
| 1444 | (unsigned long)root->root_key.objectid, |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1445 | root); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1446 | if (ret == 0) |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1447 | root->in_radix = 1; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1448 | |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1449 | spin_unlock(&fs_info->fs_roots_radix_lock); |
| 1450 | radix_tree_preload_end(); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1451 | if (ret) { |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1452 | if (ret == -EEXIST) { |
| 1453 | free_fs_root(root); |
| 1454 | goto again; |
| 1455 | } |
| 1456 | goto fail; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1457 | } |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1458 | |
| 1459 | ret = btrfs_find_dead_roots(fs_info->tree_root, |
| 1460 | root->root_key.objectid); |
| 1461 | WARN_ON(ret); |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1462 | return root; |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1463 | fail: |
| 1464 | free_fs_root(root); |
| 1465 | return ERR_PTR(ret); |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1466 | } |
| 1467 | |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1468 | static int btrfs_congested_fn(void *congested_data, int bdi_bits) |
| 1469 | { |
| 1470 | struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; |
| 1471 | int ret = 0; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1472 | struct btrfs_device *device; |
| 1473 | struct backing_dev_info *bdi; |
Chris Mason | b7967db | 2009-04-27 07:29:04 -0400 | [diff] [blame] | 1474 | |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 1475 | rcu_read_lock(); |
| 1476 | list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1477 | if (!device->bdev) |
| 1478 | continue; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1479 | bdi = blk_get_backing_dev_info(device->bdev); |
| 1480 | if (bdi && bdi_congested(bdi, bdi_bits)) { |
| 1481 | ret = 1; |
| 1482 | break; |
| 1483 | } |
| 1484 | } |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 1485 | rcu_read_unlock(); |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1486 | return ret; |
| 1487 | } |
| 1488 | |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1489 | /* |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 1490 | * If this fails, caller must call bdi_destroy() to get rid of the |
| 1491 | * bdi again. |
| 1492 | */ |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1493 | static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) |
| 1494 | { |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 1495 | int err; |
| 1496 | |
| 1497 | bdi->capabilities = BDI_CAP_MAP_COPY; |
Jens Axboe | e6d086d | 2010-04-26 10:27:54 +0200 | [diff] [blame] | 1498 | err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY); |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 1499 | if (err) |
| 1500 | return err; |
| 1501 | |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 1502 | bdi->ra_pages = default_backing_dev_info.ra_pages; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1503 | bdi->congested_fn = btrfs_congested_fn; |
| 1504 | bdi->congested_data = info; |
| 1505 | return 0; |
| 1506 | } |
| 1507 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1508 | /* |
| 1509 | * called by the kthread helper functions to finally call the bio end_io |
| 1510 | * functions. This is where read checksum verification actually happens |
| 1511 | */ |
| 1512 | static void end_workqueue_fn(struct btrfs_work *work) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1513 | { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1514 | struct bio *bio; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1515 | struct end_io_wq *end_io_wq; |
| 1516 | struct btrfs_fs_info *fs_info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1517 | int error; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1518 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1519 | end_io_wq = container_of(work, struct end_io_wq, work); |
| 1520 | bio = end_io_wq->bio; |
| 1521 | fs_info = end_io_wq->info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1522 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1523 | error = end_io_wq->error; |
| 1524 | bio->bi_private = end_io_wq->private; |
| 1525 | bio->bi_end_io = end_io_wq->end_io; |
| 1526 | kfree(end_io_wq); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1527 | bio_endio(bio, error); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 1528 | } |
| 1529 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1530 | static int cleaner_kthread(void *arg) |
| 1531 | { |
| 1532 | struct btrfs_root *root = arg; |
| 1533 | |
| 1534 | do { |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1535 | vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1536 | |
| 1537 | if (!(root->fs_info->sb->s_flags & MS_RDONLY) && |
| 1538 | mutex_trylock(&root->fs_info->cleaner_mutex)) { |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 1539 | btrfs_run_delayed_iputs(root); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1540 | btrfs_clean_old_snapshots(root); |
| 1541 | mutex_unlock(&root->fs_info->cleaner_mutex); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 1542 | btrfs_run_defrag_inodes(root->fs_info); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1543 | } |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1544 | |
Tejun Heo | a0acae0 | 2011-11-21 12:32:22 -0800 | [diff] [blame] | 1545 | if (!try_to_freeze()) { |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1546 | set_current_state(TASK_INTERRUPTIBLE); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1547 | if (!kthread_should_stop()) |
| 1548 | schedule(); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1549 | __set_current_state(TASK_RUNNING); |
| 1550 | } |
| 1551 | } while (!kthread_should_stop()); |
| 1552 | return 0; |
| 1553 | } |
| 1554 | |
| 1555 | static int transaction_kthread(void *arg) |
| 1556 | { |
| 1557 | struct btrfs_root *root = arg; |
| 1558 | struct btrfs_trans_handle *trans; |
| 1559 | struct btrfs_transaction *cur; |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1560 | u64 transid; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1561 | unsigned long now; |
| 1562 | unsigned long delay; |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1563 | bool cannot_commit; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1564 | |
| 1565 | do { |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1566 | cannot_commit = false; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1567 | delay = HZ * 30; |
| 1568 | vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE); |
| 1569 | mutex_lock(&root->fs_info->transaction_kthread_mutex); |
| 1570 | |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1571 | spin_lock(&root->fs_info->trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1572 | cur = root->fs_info->running_transaction; |
| 1573 | if (!cur) { |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1574 | spin_unlock(&root->fs_info->trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1575 | goto sleep; |
| 1576 | } |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1577 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1578 | now = get_seconds(); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1579 | if (!cur->blocked && |
| 1580 | (now < cur->start_time || now - cur->start_time < 30)) { |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1581 | spin_unlock(&root->fs_info->trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1582 | delay = HZ * 5; |
| 1583 | goto sleep; |
| 1584 | } |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1585 | transid = cur->transid; |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1586 | spin_unlock(&root->fs_info->trans_lock); |
Chris Mason | 56bec29 | 2009-03-13 10:10:06 -0400 | [diff] [blame] | 1587 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 1588 | /* If the file system is aborted, this will always fail. */ |
Josef Bacik | 7a7eaa4 | 2011-04-13 12:54:33 -0400 | [diff] [blame] | 1589 | trans = btrfs_join_transaction(root); |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1590 | if (IS_ERR(trans)) { |
| 1591 | cannot_commit = true; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 1592 | goto sleep; |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1593 | } |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1594 | if (transid == trans->transid) { |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 1595 | btrfs_commit_transaction(trans, root); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1596 | } else { |
| 1597 | btrfs_end_transaction(trans, root); |
| 1598 | } |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1599 | sleep: |
| 1600 | wake_up_process(root->fs_info->cleaner_kthread); |
| 1601 | mutex_unlock(&root->fs_info->transaction_kthread_mutex); |
| 1602 | |
Tejun Heo | a0acae0 | 2011-11-21 12:32:22 -0800 | [diff] [blame] | 1603 | if (!try_to_freeze()) { |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1604 | set_current_state(TASK_INTERRUPTIBLE); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1605 | if (!kthread_should_stop() && |
Jan Kara | 914b200 | 2012-03-12 16:05:50 +0100 | [diff] [blame] | 1606 | (!btrfs_transaction_blocked(root->fs_info) || |
| 1607 | cannot_commit)) |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1608 | schedule_timeout(delay); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1609 | __set_current_state(TASK_RUNNING); |
| 1610 | } |
| 1611 | } while (!kthread_should_stop()); |
| 1612 | return 0; |
| 1613 | } |
| 1614 | |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1615 | /* |
| 1616 | * this will find the highest generation in the array of |
| 1617 | * root backups. The index of the highest array is returned, |
| 1618 | * or -1 if we can't find anything. |
| 1619 | * |
| 1620 | * We check to make sure the array is valid by comparing the |
| 1621 | * generation of the latest root in the array with the generation |
| 1622 | * in the super block. If they don't match we pitch it. |
| 1623 | */ |
| 1624 | static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) |
| 1625 | { |
| 1626 | u64 cur; |
| 1627 | int newest_index = -1; |
| 1628 | struct btrfs_root_backup *root_backup; |
| 1629 | int i; |
| 1630 | |
| 1631 | for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { |
| 1632 | root_backup = info->super_copy->super_roots + i; |
| 1633 | cur = btrfs_backup_tree_root_gen(root_backup); |
| 1634 | if (cur == newest_gen) |
| 1635 | newest_index = i; |
| 1636 | } |
| 1637 | |
| 1638 | /* check to see if we actually wrapped around */ |
| 1639 | if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { |
| 1640 | root_backup = info->super_copy->super_roots; |
| 1641 | cur = btrfs_backup_tree_root_gen(root_backup); |
| 1642 | if (cur == newest_gen) |
| 1643 | newest_index = 0; |
| 1644 | } |
| 1645 | return newest_index; |
| 1646 | } |
| 1647 | |
| 1648 | |
| 1649 | /* |
| 1650 | * find the oldest backup so we know where to store new entries |
| 1651 | * in the backup array. This will set the backup_root_index |
| 1652 | * field in the fs_info struct |
| 1653 | */ |
| 1654 | static void find_oldest_super_backup(struct btrfs_fs_info *info, |
| 1655 | u64 newest_gen) |
| 1656 | { |
| 1657 | int newest_index = -1; |
| 1658 | |
| 1659 | newest_index = find_newest_super_backup(info, newest_gen); |
| 1660 | /* if there was garbage in there, just move along */ |
| 1661 | if (newest_index == -1) { |
| 1662 | info->backup_root_index = 0; |
| 1663 | } else { |
| 1664 | info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; |
| 1665 | } |
| 1666 | } |
| 1667 | |
| 1668 | /* |
| 1669 | * copy all the root pointers into the super backup array. |
| 1670 | * this will bump the backup pointer by one when it is |
| 1671 | * done |
| 1672 | */ |
| 1673 | static void backup_super_roots(struct btrfs_fs_info *info) |
| 1674 | { |
| 1675 | int next_backup; |
| 1676 | struct btrfs_root_backup *root_backup; |
| 1677 | int last_backup; |
| 1678 | |
| 1679 | next_backup = info->backup_root_index; |
| 1680 | last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % |
| 1681 | BTRFS_NUM_BACKUP_ROOTS; |
| 1682 | |
| 1683 | /* |
| 1684 | * just overwrite the last backup if we're at the same generation |
| 1685 | * this happens only at umount |
| 1686 | */ |
| 1687 | root_backup = info->super_for_commit->super_roots + last_backup; |
| 1688 | if (btrfs_backup_tree_root_gen(root_backup) == |
| 1689 | btrfs_header_generation(info->tree_root->node)) |
| 1690 | next_backup = last_backup; |
| 1691 | |
| 1692 | root_backup = info->super_for_commit->super_roots + next_backup; |
| 1693 | |
| 1694 | /* |
| 1695 | * make sure all of our padding and empty slots get zero filled |
| 1696 | * regardless of which ones we use today |
| 1697 | */ |
| 1698 | memset(root_backup, 0, sizeof(*root_backup)); |
| 1699 | |
| 1700 | info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; |
| 1701 | |
| 1702 | btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); |
| 1703 | btrfs_set_backup_tree_root_gen(root_backup, |
| 1704 | btrfs_header_generation(info->tree_root->node)); |
| 1705 | |
| 1706 | btrfs_set_backup_tree_root_level(root_backup, |
| 1707 | btrfs_header_level(info->tree_root->node)); |
| 1708 | |
| 1709 | btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); |
| 1710 | btrfs_set_backup_chunk_root_gen(root_backup, |
| 1711 | btrfs_header_generation(info->chunk_root->node)); |
| 1712 | btrfs_set_backup_chunk_root_level(root_backup, |
| 1713 | btrfs_header_level(info->chunk_root->node)); |
| 1714 | |
| 1715 | btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); |
| 1716 | btrfs_set_backup_extent_root_gen(root_backup, |
| 1717 | btrfs_header_generation(info->extent_root->node)); |
| 1718 | btrfs_set_backup_extent_root_level(root_backup, |
| 1719 | btrfs_header_level(info->extent_root->node)); |
| 1720 | |
Chris Mason | 7c7e82a | 2011-11-06 18:50:56 -0500 | [diff] [blame] | 1721 | /* |
| 1722 | * we might commit during log recovery, which happens before we set |
| 1723 | * the fs_root. Make sure it is valid before we fill it in. |
| 1724 | */ |
| 1725 | if (info->fs_root && info->fs_root->node) { |
| 1726 | btrfs_set_backup_fs_root(root_backup, |
| 1727 | info->fs_root->node->start); |
| 1728 | btrfs_set_backup_fs_root_gen(root_backup, |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1729 | btrfs_header_generation(info->fs_root->node)); |
Chris Mason | 7c7e82a | 2011-11-06 18:50:56 -0500 | [diff] [blame] | 1730 | btrfs_set_backup_fs_root_level(root_backup, |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1731 | btrfs_header_level(info->fs_root->node)); |
Chris Mason | 7c7e82a | 2011-11-06 18:50:56 -0500 | [diff] [blame] | 1732 | } |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1733 | |
| 1734 | btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); |
| 1735 | btrfs_set_backup_dev_root_gen(root_backup, |
| 1736 | btrfs_header_generation(info->dev_root->node)); |
| 1737 | btrfs_set_backup_dev_root_level(root_backup, |
| 1738 | btrfs_header_level(info->dev_root->node)); |
| 1739 | |
| 1740 | btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); |
| 1741 | btrfs_set_backup_csum_root_gen(root_backup, |
| 1742 | btrfs_header_generation(info->csum_root->node)); |
| 1743 | btrfs_set_backup_csum_root_level(root_backup, |
| 1744 | btrfs_header_level(info->csum_root->node)); |
| 1745 | |
| 1746 | btrfs_set_backup_total_bytes(root_backup, |
| 1747 | btrfs_super_total_bytes(info->super_copy)); |
| 1748 | btrfs_set_backup_bytes_used(root_backup, |
| 1749 | btrfs_super_bytes_used(info->super_copy)); |
| 1750 | btrfs_set_backup_num_devices(root_backup, |
| 1751 | btrfs_super_num_devices(info->super_copy)); |
| 1752 | |
| 1753 | /* |
| 1754 | * if we don't copy this out to the super_copy, it won't get remembered |
| 1755 | * for the next commit |
| 1756 | */ |
| 1757 | memcpy(&info->super_copy->super_roots, |
| 1758 | &info->super_for_commit->super_roots, |
| 1759 | sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); |
| 1760 | } |
| 1761 | |
| 1762 | /* |
| 1763 | * this copies info out of the root backup array and back into |
| 1764 | * the in-memory super block. It is meant to help iterate through |
| 1765 | * the array, so you send it the number of backups you've already |
| 1766 | * tried and the last backup index you used. |
| 1767 | * |
| 1768 | * this returns -1 when it has tried all the backups |
| 1769 | */ |
| 1770 | static noinline int next_root_backup(struct btrfs_fs_info *info, |
| 1771 | struct btrfs_super_block *super, |
| 1772 | int *num_backups_tried, int *backup_index) |
| 1773 | { |
| 1774 | struct btrfs_root_backup *root_backup; |
| 1775 | int newest = *backup_index; |
| 1776 | |
| 1777 | if (*num_backups_tried == 0) { |
| 1778 | u64 gen = btrfs_super_generation(super); |
| 1779 | |
| 1780 | newest = find_newest_super_backup(info, gen); |
| 1781 | if (newest == -1) |
| 1782 | return -1; |
| 1783 | |
| 1784 | *backup_index = newest; |
| 1785 | *num_backups_tried = 1; |
| 1786 | } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { |
| 1787 | /* we've tried all the backups, all done */ |
| 1788 | return -1; |
| 1789 | } else { |
| 1790 | /* jump to the next oldest backup */ |
| 1791 | newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % |
| 1792 | BTRFS_NUM_BACKUP_ROOTS; |
| 1793 | *backup_index = newest; |
| 1794 | *num_backups_tried += 1; |
| 1795 | } |
| 1796 | root_backup = super->super_roots + newest; |
| 1797 | |
| 1798 | btrfs_set_super_generation(super, |
| 1799 | btrfs_backup_tree_root_gen(root_backup)); |
| 1800 | btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); |
| 1801 | btrfs_set_super_root_level(super, |
| 1802 | btrfs_backup_tree_root_level(root_backup)); |
| 1803 | btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); |
| 1804 | |
| 1805 | /* |
| 1806 | * fixme: the total bytes and num_devices need to match or we should |
| 1807 | * need a fsck |
| 1808 | */ |
| 1809 | btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); |
| 1810 | btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); |
| 1811 | return 0; |
| 1812 | } |
| 1813 | |
| 1814 | /* helper to cleanup tree roots */ |
| 1815 | static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) |
| 1816 | { |
| 1817 | free_extent_buffer(info->tree_root->node); |
| 1818 | free_extent_buffer(info->tree_root->commit_root); |
| 1819 | free_extent_buffer(info->dev_root->node); |
| 1820 | free_extent_buffer(info->dev_root->commit_root); |
| 1821 | free_extent_buffer(info->extent_root->node); |
| 1822 | free_extent_buffer(info->extent_root->commit_root); |
| 1823 | free_extent_buffer(info->csum_root->node); |
| 1824 | free_extent_buffer(info->csum_root->commit_root); |
| 1825 | |
| 1826 | info->tree_root->node = NULL; |
| 1827 | info->tree_root->commit_root = NULL; |
| 1828 | info->dev_root->node = NULL; |
| 1829 | info->dev_root->commit_root = NULL; |
| 1830 | info->extent_root->node = NULL; |
| 1831 | info->extent_root->commit_root = NULL; |
| 1832 | info->csum_root->node = NULL; |
| 1833 | info->csum_root->commit_root = NULL; |
| 1834 | |
| 1835 | if (chunk_root) { |
| 1836 | free_extent_buffer(info->chunk_root->node); |
| 1837 | free_extent_buffer(info->chunk_root->commit_root); |
| 1838 | info->chunk_root->node = NULL; |
| 1839 | info->chunk_root->commit_root = NULL; |
| 1840 | } |
| 1841 | } |
| 1842 | |
| 1843 | |
Al Viro | ad2b2c8 | 2011-11-17 01:10:02 -0500 | [diff] [blame] | 1844 | int open_ctree(struct super_block *sb, |
| 1845 | struct btrfs_fs_devices *fs_devices, |
| 1846 | char *options) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1847 | { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1848 | u32 sectorsize; |
| 1849 | u32 nodesize; |
| 1850 | u32 leafsize; |
| 1851 | u32 blocksize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1852 | u32 stripesize; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1853 | u64 generation; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1854 | u64 features; |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 1855 | struct btrfs_key location; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1856 | struct buffer_head *bh; |
Ilya Dryomov | 4d34b27 | 2011-11-09 00:08:15 +0200 | [diff] [blame] | 1857 | struct btrfs_super_block *disk_super; |
Al Viro | 815745c | 2011-11-17 15:40:49 -0500 | [diff] [blame] | 1858 | struct btrfs_fs_info *fs_info = btrfs_sb(sb); |
Al Viro | f84a8bd | 2011-11-17 15:57:57 -0500 | [diff] [blame] | 1859 | struct btrfs_root *tree_root; |
Ilya Dryomov | 4d34b27 | 2011-11-09 00:08:15 +0200 | [diff] [blame] | 1860 | struct btrfs_root *extent_root; |
| 1861 | struct btrfs_root *csum_root; |
| 1862 | struct btrfs_root *chunk_root; |
| 1863 | struct btrfs_root *dev_root; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1864 | struct btrfs_root *log_tree_root; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1865 | int ret; |
Yan | e58ca02 | 2008-04-01 11:21:34 -0400 | [diff] [blame] | 1866 | int err = -EINVAL; |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1867 | int num_backups_tried = 0; |
| 1868 | int backup_index = 0; |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 1869 | |
Al Viro | f84a8bd | 2011-11-17 15:57:57 -0500 | [diff] [blame] | 1870 | tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info); |
Al Viro | 6f07e42 | 2011-11-17 00:46:16 -0500 | [diff] [blame] | 1871 | extent_root = fs_info->extent_root = btrfs_alloc_root(fs_info); |
| 1872 | csum_root = fs_info->csum_root = btrfs_alloc_root(fs_info); |
| 1873 | chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info); |
| 1874 | dev_root = fs_info->dev_root = btrfs_alloc_root(fs_info); |
Chris Mason | 8790d50 | 2008-04-03 16:29:03 -0400 | [diff] [blame] | 1875 | |
Al Viro | f84a8bd | 2011-11-17 15:57:57 -0500 | [diff] [blame] | 1876 | if (!tree_root || !extent_root || !csum_root || |
| 1877 | !chunk_root || !dev_root) { |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1878 | err = -ENOMEM; |
| 1879 | goto fail; |
| 1880 | } |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1881 | |
| 1882 | ret = init_srcu_struct(&fs_info->subvol_srcu); |
| 1883 | if (ret) { |
| 1884 | err = ret; |
| 1885 | goto fail; |
| 1886 | } |
| 1887 | |
| 1888 | ret = setup_bdi(fs_info, &fs_info->bdi); |
| 1889 | if (ret) { |
| 1890 | err = ret; |
| 1891 | goto fail_srcu; |
| 1892 | } |
| 1893 | |
| 1894 | fs_info->btree_inode = new_inode(sb); |
| 1895 | if (!fs_info->btree_inode) { |
| 1896 | err = -ENOMEM; |
| 1897 | goto fail_bdi; |
| 1898 | } |
| 1899 | |
Chris Mason | a659171 | 2011-07-19 12:04:14 -0400 | [diff] [blame] | 1900 | mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); |
Miao Xie | 1561ded | 2011-03-27 16:07:36 +0800 | [diff] [blame] | 1901 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1902 | INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); |
Chris Mason | 8fd1779 | 2007-04-19 21:01:03 -0400 | [diff] [blame] | 1903 | INIT_LIST_HEAD(&fs_info->trans_list); |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 1904 | INIT_LIST_HEAD(&fs_info->dead_roots); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 1905 | INIT_LIST_HEAD(&fs_info->delayed_iputs); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1906 | INIT_LIST_HEAD(&fs_info->hashers); |
Chris Mason | ea8c281 | 2008-08-04 23:17:27 -0400 | [diff] [blame] | 1907 | INIT_LIST_HEAD(&fs_info->delalloc_inodes); |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 1908 | INIT_LIST_HEAD(&fs_info->ordered_operations); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 1909 | INIT_LIST_HEAD(&fs_info->caching_block_groups); |
Chris Mason | 1832a6d | 2007-12-21 16:27:21 -0500 | [diff] [blame] | 1910 | spin_lock_init(&fs_info->delalloc_lock); |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1911 | spin_lock_init(&fs_info->trans_lock); |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1912 | spin_lock_init(&fs_info->ref_cache_lock); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1913 | spin_lock_init(&fs_info->fs_roots_radix_lock); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 1914 | spin_lock_init(&fs_info->delayed_iput_lock); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 1915 | spin_lock_init(&fs_info->defrag_inodes_lock); |
Josef Bacik | 2bf6475 | 2011-09-26 17:12:22 -0400 | [diff] [blame] | 1916 | spin_lock_init(&fs_info->free_chunk_lock); |
Chris Mason | 7585717 | 2011-06-13 20:00:16 -0400 | [diff] [blame] | 1917 | mutex_init(&fs_info->reloc_mutex); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1918 | |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1919 | init_completion(&fs_info->kobj_unregister); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1920 | INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 1921 | INIT_LIST_HEAD(&fs_info->space_info); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1922 | btrfs_mapping_init(&fs_info->mapping_tree); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1923 | btrfs_init_block_rsv(&fs_info->global_block_rsv); |
| 1924 | btrfs_init_block_rsv(&fs_info->delalloc_block_rsv); |
| 1925 | btrfs_init_block_rsv(&fs_info->trans_block_rsv); |
| 1926 | btrfs_init_block_rsv(&fs_info->chunk_block_rsv); |
| 1927 | btrfs_init_block_rsv(&fs_info->empty_block_rsv); |
Josef Bacik | 6d668dd | 2011-11-03 22:54:25 -0400 | [diff] [blame] | 1928 | btrfs_init_block_rsv(&fs_info->delayed_block_rsv); |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 1929 | atomic_set(&fs_info->nr_async_submits, 0); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1930 | atomic_set(&fs_info->async_delalloc_pages, 0); |
Chris Mason | 8c8bee1 | 2008-09-29 11:19:10 -0400 | [diff] [blame] | 1931 | atomic_set(&fs_info->async_submit_draining, 0); |
Chris Mason | 0986fe9e | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 1932 | atomic_set(&fs_info->nr_async_bios, 0); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 1933 | atomic_set(&fs_info->defrag_running, 0); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1934 | fs_info->sb = sb; |
Chris Mason | 6f568d3 | 2008-01-29 16:03:38 -0500 | [diff] [blame] | 1935 | fs_info->max_inline = 8192 * 1024; |
Josef Bacik | 9ed74f2 | 2009-09-11 16:12:44 -0400 | [diff] [blame] | 1936 | fs_info->metadata_ratio = 0; |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 1937 | fs_info->defrag_inodes = RB_ROOT; |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1938 | fs_info->trans_no_join = 0; |
Josef Bacik | 2bf6475 | 2011-09-26 17:12:22 -0400 | [diff] [blame] | 1939 | fs_info->free_chunk_space = 0; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 1940 | |
Arne Jansen | 90519d6 | 2011-05-23 14:30:00 +0200 | [diff] [blame] | 1941 | /* readahead state */ |
| 1942 | INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT); |
| 1943 | spin_lock_init(&fs_info->reada_lock); |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 1944 | |
Chris Mason | b34b086 | 2008-12-19 15:43:22 -0500 | [diff] [blame] | 1945 | fs_info->thread_pool_size = min_t(unsigned long, |
| 1946 | num_online_cpus() + 2, 8); |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 1947 | |
Chris Mason | 3eaa288 | 2008-07-24 11:57:52 -0400 | [diff] [blame] | 1948 | INIT_LIST_HEAD(&fs_info->ordered_extents); |
| 1949 | spin_lock_init(&fs_info->ordered_extent_lock); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 1950 | fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), |
| 1951 | GFP_NOFS); |
| 1952 | if (!fs_info->delayed_root) { |
| 1953 | err = -ENOMEM; |
| 1954 | goto fail_iput; |
| 1955 | } |
| 1956 | btrfs_init_delayed_root(fs_info->delayed_root); |
Chris Mason | 3eaa288 | 2008-07-24 11:57:52 -0400 | [diff] [blame] | 1957 | |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 1958 | mutex_init(&fs_info->scrub_lock); |
| 1959 | atomic_set(&fs_info->scrubs_running, 0); |
| 1960 | atomic_set(&fs_info->scrub_pause_req, 0); |
| 1961 | atomic_set(&fs_info->scrubs_paused, 0); |
| 1962 | atomic_set(&fs_info->scrub_cancel_req, 0); |
| 1963 | init_waitqueue_head(&fs_info->scrub_pause_wait); |
| 1964 | init_rwsem(&fs_info->scrub_super_lock); |
| 1965 | fs_info->scrub_workers_refcnt = 0; |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 1966 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
| 1967 | fs_info->check_integrity_print_mask = 0; |
| 1968 | #endif |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 1969 | |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 1970 | spin_lock_init(&fs_info->balance_lock); |
| 1971 | mutex_init(&fs_info->balance_mutex); |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 1972 | atomic_set(&fs_info->balance_running, 0); |
| 1973 | atomic_set(&fs_info->balance_pause_req, 0); |
Ilya Dryomov | a7e99c6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 1974 | atomic_set(&fs_info->balance_cancel_req, 0); |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 1975 | fs_info->balance_ctl = NULL; |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 1976 | init_waitqueue_head(&fs_info->balance_wait_q); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1977 | |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 1978 | sb->s_blocksize = 4096; |
| 1979 | sb->s_blocksize_bits = blksize_bits(4096); |
Jens Axboe | 32a88aa | 2009-09-16 15:02:33 +0200 | [diff] [blame] | 1980 | sb->s_bdi = &fs_info->bdi; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 1981 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1982 | fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 1983 | set_nlink(fs_info->btree_inode, 1); |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 1984 | /* |
| 1985 | * we set the i_size on the btree inode to the max possible int. |
| 1986 | * the real end of the address space is determined by all of |
| 1987 | * the devices in the system |
| 1988 | */ |
| 1989 | fs_info->btree_inode->i_size = OFFSET_MAX; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1990 | fs_info->btree_inode->i_mapping->a_ops = &btree_aops; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1991 | fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; |
| 1992 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1993 | RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1994 | extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, |
David Sterba | f993c88 | 2011-04-20 23:35:57 +0200 | [diff] [blame] | 1995 | fs_info->btree_inode->i_mapping); |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 1996 | BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; |
David Sterba | a8067e0 | 2011-04-21 00:34:43 +0200 | [diff] [blame] | 1997 | extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 1998 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1999 | BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; |
| 2000 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2001 | BTRFS_I(fs_info->btree_inode)->root = tree_root; |
| 2002 | memset(&BTRFS_I(fs_info->btree_inode)->location, 0, |
| 2003 | sizeof(struct btrfs_key)); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2004 | BTRFS_I(fs_info->btree_inode)->dummy_inode = 1; |
Chris Mason | 22b0ebd | 2007-03-30 08:47:31 -0400 | [diff] [blame] | 2005 | insert_inode_hash(fs_info->btree_inode); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2006 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2007 | spin_lock_init(&fs_info->block_group_cache_lock); |
Eric Paris | 6bef4d3 | 2010-02-23 19:43:04 +0000 | [diff] [blame] | 2008 | fs_info->block_group_cache_tree = RB_ROOT; |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2009 | |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2010 | extent_io_tree_init(&fs_info->freed_extents[0], |
David Sterba | f993c88 | 2011-04-20 23:35:57 +0200 | [diff] [blame] | 2011 | fs_info->btree_inode->i_mapping); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2012 | extent_io_tree_init(&fs_info->freed_extents[1], |
David Sterba | f993c88 | 2011-04-20 23:35:57 +0200 | [diff] [blame] | 2013 | fs_info->btree_inode->i_mapping); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2014 | fs_info->pinned_extents = &fs_info->freed_extents[0]; |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 2015 | fs_info->do_barriers = 1; |
Chris Mason | f929574 | 2008-07-17 12:54:14 -0400 | [diff] [blame] | 2016 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 2017 | |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 2018 | mutex_init(&fs_info->ordered_operations_mutex); |
Chris Mason | 30ae846 | 2007-03-29 09:59:15 -0400 | [diff] [blame] | 2019 | mutex_init(&fs_info->tree_log_mutex); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2020 | mutex_init(&fs_info->chunk_mutex); |
| 2021 | mutex_init(&fs_info->transaction_kthread_mutex); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2022 | mutex_init(&fs_info->cleaner_mutex); |
| 2023 | mutex_init(&fs_info->volume_mutex); |
Yan Zheng | 276e680 | 2009-07-30 09:40:40 -0400 | [diff] [blame] | 2024 | init_rwsem(&fs_info->extent_commit_sem); |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 2025 | init_rwsem(&fs_info->cleanup_work_sem); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2026 | init_rwsem(&fs_info->subvol_sem); |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 2027 | |
| 2028 | btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); |
| 2029 | btrfs_init_free_cluster(&fs_info->data_alloc_cluster); |
| 2030 | |
Chris Mason | 7d9eb12 | 2008-07-08 14:19:17 -0400 | [diff] [blame] | 2031 | init_waitqueue_head(&fs_info->transaction_throttle); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 2032 | init_waitqueue_head(&fs_info->transaction_wait); |
Sage Weil | bb9c12c | 2010-10-29 15:37:34 -0400 | [diff] [blame] | 2033 | init_waitqueue_head(&fs_info->transaction_blocked_wait); |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 2034 | init_waitqueue_head(&fs_info->async_submit_wait); |
Chris Mason | 9a8dd15 | 2007-02-23 08:38:36 -0500 | [diff] [blame] | 2035 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2036 | __setup_root(4096, 4096, 4096, 4096, tree_root, |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 2037 | fs_info, BTRFS_ROOT_TREE_OBJECTID); |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 2038 | |
Chris Mason | 3c4bb26 | 2012-03-27 18:56:56 -0400 | [diff] [blame] | 2039 | invalidate_bdev(fs_devices->latest_bdev); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2040 | bh = btrfs_read_dev_super(fs_devices->latest_bdev); |
Dave Young | 20b4507 | 2011-01-08 10:09:13 +0000 | [diff] [blame] | 2041 | if (!bh) { |
| 2042 | err = -EINVAL; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2043 | goto fail_alloc; |
Dave Young | 20b4507 | 2011-01-08 10:09:13 +0000 | [diff] [blame] | 2044 | } |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2045 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2046 | memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); |
| 2047 | memcpy(fs_info->super_for_commit, fs_info->super_copy, |
| 2048 | sizeof(*fs_info->super_for_commit)); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2049 | brelse(bh); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2050 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2051 | memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2052 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2053 | disk_super = fs_info->super_copy; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2054 | if (!btrfs_super_root(disk_super)) |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2055 | goto fail_alloc; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2056 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2057 | /* check FS state, whether FS is broken. */ |
| 2058 | fs_info->fs_state |= btrfs_super_flags(disk_super); |
| 2059 | |
David Sterba | fcd1f065 | 2012-03-06 00:06:18 +0100 | [diff] [blame] | 2060 | ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); |
| 2061 | if (ret) { |
| 2062 | printk(KERN_ERR "btrfs: superblock contains fatal errors\n"); |
| 2063 | err = ret; |
| 2064 | goto fail_alloc; |
| 2065 | } |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2066 | |
Liu Bo | 75e7cb7 | 2011-03-22 10:12:20 +0000 | [diff] [blame] | 2067 | /* |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2068 | * run through our array of backup supers and setup |
| 2069 | * our ring pointer to the oldest one |
| 2070 | */ |
| 2071 | generation = btrfs_super_generation(disk_super); |
| 2072 | find_oldest_super_backup(fs_info, generation); |
| 2073 | |
| 2074 | /* |
Liu Bo | 75e7cb7 | 2011-03-22 10:12:20 +0000 | [diff] [blame] | 2075 | * In the long term, we'll store the compression type in the super |
| 2076 | * block, and it'll be used for per file compression control. |
| 2077 | */ |
| 2078 | fs_info->compress_type = BTRFS_COMPRESS_ZLIB; |
| 2079 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2080 | ret = btrfs_parse_options(tree_root, options); |
| 2081 | if (ret) { |
| 2082 | err = ret; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2083 | goto fail_alloc; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2084 | } |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2085 | |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2086 | features = btrfs_super_incompat_flags(disk_super) & |
| 2087 | ~BTRFS_FEATURE_INCOMPAT_SUPP; |
| 2088 | if (features) { |
| 2089 | printk(KERN_ERR "BTRFS: couldn't mount because of " |
| 2090 | "unsupported optional features (%Lx).\n", |
Joel Becker | 2138093 | 2009-04-21 12:38:29 -0700 | [diff] [blame] | 2091 | (unsigned long long)features); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2092 | err = -EINVAL; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2093 | goto fail_alloc; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2094 | } |
| 2095 | |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 2096 | if (btrfs_super_leafsize(disk_super) != |
| 2097 | btrfs_super_nodesize(disk_super)) { |
| 2098 | printk(KERN_ERR "BTRFS: couldn't mount because metadata " |
| 2099 | "blocksizes don't match. node %d leaf %d\n", |
| 2100 | btrfs_super_nodesize(disk_super), |
| 2101 | btrfs_super_leafsize(disk_super)); |
| 2102 | err = -EINVAL; |
| 2103 | goto fail_alloc; |
| 2104 | } |
| 2105 | if (btrfs_super_leafsize(disk_super) > BTRFS_MAX_METADATA_BLOCKSIZE) { |
| 2106 | printk(KERN_ERR "BTRFS: couldn't mount because metadata " |
| 2107 | "blocksize (%d) was too large\n", |
| 2108 | btrfs_super_leafsize(disk_super)); |
| 2109 | err = -EINVAL; |
| 2110 | goto fail_alloc; |
| 2111 | } |
| 2112 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2113 | features = btrfs_super_incompat_flags(disk_super); |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 2114 | features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; |
| 2115 | if (tree_root->fs_info->compress_type & BTRFS_COMPRESS_LZO) |
| 2116 | features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 2117 | |
| 2118 | /* |
| 2119 | * flag our filesystem as having big metadata blocks if |
| 2120 | * they are bigger than the page size |
| 2121 | */ |
| 2122 | if (btrfs_super_leafsize(disk_super) > PAGE_CACHE_SIZE) { |
| 2123 | if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) |
| 2124 | printk(KERN_INFO "btrfs flagging fs with big metadata feature\n"); |
| 2125 | features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; |
| 2126 | } |
| 2127 | |
Chris Mason | bc3f116 | 2012-03-29 17:02:47 -0400 | [diff] [blame] | 2128 | nodesize = btrfs_super_nodesize(disk_super); |
| 2129 | leafsize = btrfs_super_leafsize(disk_super); |
| 2130 | sectorsize = btrfs_super_sectorsize(disk_super); |
| 2131 | stripesize = btrfs_super_stripesize(disk_super); |
| 2132 | |
| 2133 | /* |
| 2134 | * mixed block groups end up with duplicate but slightly offset |
| 2135 | * extent buffers for the same range. It leads to corruptions |
| 2136 | */ |
| 2137 | if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && |
| 2138 | (sectorsize != leafsize)) { |
| 2139 | printk(KERN_WARNING "btrfs: unequal leaf/node/sector sizes " |
| 2140 | "are not allowed for mixed block groups on %s\n", |
| 2141 | sb->s_id); |
| 2142 | goto fail_alloc; |
| 2143 | } |
| 2144 | |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 2145 | btrfs_set_super_incompat_flags(disk_super, features); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2146 | |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2147 | features = btrfs_super_compat_ro_flags(disk_super) & |
| 2148 | ~BTRFS_FEATURE_COMPAT_RO_SUPP; |
| 2149 | if (!(sb->s_flags & MS_RDONLY) && features) { |
| 2150 | printk(KERN_ERR "BTRFS: couldn't mount RDWR because of " |
| 2151 | "unsupported option features (%Lx).\n", |
Joel Becker | 2138093 | 2009-04-21 12:38:29 -0700 | [diff] [blame] | 2152 | (unsigned long long)features); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2153 | err = -EINVAL; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2154 | goto fail_alloc; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2155 | } |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2156 | |
| 2157 | btrfs_init_workers(&fs_info->generic_worker, |
| 2158 | "genwork", 1, NULL); |
| 2159 | |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 2160 | btrfs_init_workers(&fs_info->workers, "worker", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2161 | fs_info->thread_pool_size, |
| 2162 | &fs_info->generic_worker); |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 2163 | |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2164 | btrfs_init_workers(&fs_info->delalloc_workers, "delalloc", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2165 | fs_info->thread_pool_size, |
| 2166 | &fs_info->generic_worker); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2167 | |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 2168 | btrfs_init_workers(&fs_info->submit_workers, "submit", |
Chris Mason | b720d20 | 2008-08-15 15:34:14 -0400 | [diff] [blame] | 2169 | min_t(u64, fs_devices->num_devices, |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2170 | fs_info->thread_pool_size), |
| 2171 | &fs_info->generic_worker); |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 2172 | |
Josef Bacik | bab39bf | 2011-06-30 14:42:28 -0400 | [diff] [blame] | 2173 | btrfs_init_workers(&fs_info->caching_workers, "cache", |
| 2174 | 2, &fs_info->generic_worker); |
| 2175 | |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 2176 | /* a higher idle thresh on the submit workers makes it much more |
| 2177 | * likely that bios will be send down in a sane order to the |
| 2178 | * devices |
| 2179 | */ |
| 2180 | fs_info->submit_workers.idle_thresh = 64; |
Chris Mason | 5386323 | 2008-08-15 15:34:18 -0400 | [diff] [blame] | 2181 | |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2182 | fs_info->workers.idle_thresh = 16; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 2183 | fs_info->workers.ordered = 1; |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 2184 | |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2185 | fs_info->delalloc_workers.idle_thresh = 2; |
| 2186 | fs_info->delalloc_workers.ordered = 1; |
| 2187 | |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2188 | btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1, |
| 2189 | &fs_info->generic_worker); |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 2190 | btrfs_init_workers(&fs_info->endio_workers, "endio", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2191 | fs_info->thread_pool_size, |
| 2192 | &fs_info->generic_worker); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2193 | btrfs_init_workers(&fs_info->endio_meta_workers, "endio-meta", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2194 | fs_info->thread_pool_size, |
| 2195 | &fs_info->generic_worker); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 2196 | btrfs_init_workers(&fs_info->endio_meta_write_workers, |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2197 | "endio-meta-write", fs_info->thread_pool_size, |
| 2198 | &fs_info->generic_worker); |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 2199 | btrfs_init_workers(&fs_info->endio_write_workers, "endio-write", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2200 | fs_info->thread_pool_size, |
| 2201 | &fs_info->generic_worker); |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 2202 | btrfs_init_workers(&fs_info->endio_freespace_worker, "freespace-write", |
| 2203 | 1, &fs_info->generic_worker); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2204 | btrfs_init_workers(&fs_info->delayed_workers, "delayed-meta", |
| 2205 | fs_info->thread_pool_size, |
| 2206 | &fs_info->generic_worker); |
Arne Jansen | 90519d6 | 2011-05-23 14:30:00 +0200 | [diff] [blame] | 2207 | btrfs_init_workers(&fs_info->readahead_workers, "readahead", |
| 2208 | fs_info->thread_pool_size, |
| 2209 | &fs_info->generic_worker); |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 2210 | |
| 2211 | /* |
| 2212 | * endios are largely parallel and should have a very |
| 2213 | * low idle thresh |
| 2214 | */ |
| 2215 | fs_info->endio_workers.idle_thresh = 4; |
Chris Mason | b51912c | 2009-02-04 09:23:24 -0500 | [diff] [blame] | 2216 | fs_info->endio_meta_workers.idle_thresh = 4; |
| 2217 | |
Chris Mason | 9042846 | 2009-08-04 16:56:34 -0400 | [diff] [blame] | 2218 | fs_info->endio_write_workers.idle_thresh = 2; |
| 2219 | fs_info->endio_meta_write_workers.idle_thresh = 2; |
Arne Jansen | 90519d6 | 2011-05-23 14:30:00 +0200 | [diff] [blame] | 2220 | fs_info->readahead_workers.idle_thresh = 2; |
Chris Mason | 9042846 | 2009-08-04 16:56:34 -0400 | [diff] [blame] | 2221 | |
Josef Bacik | 0dc3b84 | 2011-11-18 14:37:27 -0500 | [diff] [blame] | 2222 | /* |
| 2223 | * btrfs_start_workers can really only fail because of ENOMEM so just |
| 2224 | * return -ENOMEM if any of these fail. |
| 2225 | */ |
| 2226 | ret = btrfs_start_workers(&fs_info->workers); |
| 2227 | ret |= btrfs_start_workers(&fs_info->generic_worker); |
| 2228 | ret |= btrfs_start_workers(&fs_info->submit_workers); |
| 2229 | ret |= btrfs_start_workers(&fs_info->delalloc_workers); |
| 2230 | ret |= btrfs_start_workers(&fs_info->fixup_workers); |
| 2231 | ret |= btrfs_start_workers(&fs_info->endio_workers); |
| 2232 | ret |= btrfs_start_workers(&fs_info->endio_meta_workers); |
| 2233 | ret |= btrfs_start_workers(&fs_info->endio_meta_write_workers); |
| 2234 | ret |= btrfs_start_workers(&fs_info->endio_write_workers); |
| 2235 | ret |= btrfs_start_workers(&fs_info->endio_freespace_worker); |
| 2236 | ret |= btrfs_start_workers(&fs_info->delayed_workers); |
| 2237 | ret |= btrfs_start_workers(&fs_info->caching_workers); |
| 2238 | ret |= btrfs_start_workers(&fs_info->readahead_workers); |
| 2239 | if (ret) { |
| 2240 | ret = -ENOMEM; |
| 2241 | goto fail_sb_buffer; |
| 2242 | } |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 2243 | |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 2244 | fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 2245 | fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, |
| 2246 | 4 * 1024 * 1024 / PAGE_CACHE_SIZE); |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 2247 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2248 | tree_root->nodesize = nodesize; |
| 2249 | tree_root->leafsize = leafsize; |
| 2250 | tree_root->sectorsize = sectorsize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 2251 | tree_root->stripesize = stripesize; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2252 | |
| 2253 | sb->s_blocksize = sectorsize; |
| 2254 | sb->s_blocksize_bits = blksize_bits(sectorsize); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2255 | |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2256 | if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC, |
| 2257 | sizeof(disk_super->magic))) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2258 | 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] | 2259 | goto fail_sb_buffer; |
| 2260 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 2261 | |
Liu Bo | 8d082fb | 2012-04-03 09:56:53 +0800 | [diff] [blame] | 2262 | if (sectorsize != PAGE_SIZE) { |
| 2263 | printk(KERN_WARNING "btrfs: Incompatible sector size(%lu) " |
| 2264 | "found on %s\n", (unsigned long)sectorsize, sb->s_id); |
Keith Mannthey | 941b2dd | 2011-11-29 17:44:12 -0800 | [diff] [blame] | 2265 | goto fail_sb_buffer; |
| 2266 | } |
| 2267 | |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2268 | mutex_lock(&fs_info->chunk_mutex); |
Yan Zheng | e4404d6 | 2008-12-12 10:03:26 -0500 | [diff] [blame] | 2269 | ret = btrfs_read_sys_array(tree_root); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2270 | mutex_unlock(&fs_info->chunk_mutex); |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 2271 | if (ret) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2272 | printk(KERN_WARNING "btrfs: failed to read the system " |
| 2273 | "array on %s\n", sb->s_id); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2274 | goto fail_sb_buffer; |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 2275 | } |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2276 | |
| 2277 | blocksize = btrfs_level_size(tree_root, |
| 2278 | btrfs_super_chunk_root_level(disk_super)); |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2279 | generation = btrfs_super_chunk_root_generation(disk_super); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2280 | |
| 2281 | __setup_root(nodesize, leafsize, sectorsize, stripesize, |
| 2282 | chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); |
| 2283 | |
| 2284 | chunk_root->node = read_tree_block(chunk_root, |
| 2285 | btrfs_super_chunk_root(disk_super), |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2286 | blocksize, generation); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2287 | BUG_ON(!chunk_root->node); /* -ENOMEM */ |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 2288 | if (!test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { |
| 2289 | printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n", |
| 2290 | sb->s_id); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2291 | goto fail_tree_roots; |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 2292 | } |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2293 | btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); |
| 2294 | chunk_root->commit_root = btrfs_root_node(chunk_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2295 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 2296 | read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2297 | (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node), |
| 2298 | BTRFS_UUID_SIZE); |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 2299 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2300 | ret = btrfs_read_chunk_tree(chunk_root); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2301 | if (ret) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2302 | printk(KERN_WARNING "btrfs: failed to read chunk tree on %s\n", |
| 2303 | sb->s_id); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2304 | goto fail_tree_roots; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2305 | } |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2306 | |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2307 | btrfs_close_extra_devices(fs_devices); |
| 2308 | |
Chris Mason | a6b0d5c | 2012-02-20 20:53:43 -0500 | [diff] [blame] | 2309 | if (!fs_devices->latest_bdev) { |
| 2310 | printk(KERN_CRIT "btrfs: failed to read devices on %s\n", |
| 2311 | sb->s_id); |
| 2312 | goto fail_tree_roots; |
| 2313 | } |
| 2314 | |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2315 | retry_root_backup: |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2316 | blocksize = btrfs_level_size(tree_root, |
| 2317 | btrfs_super_root_level(disk_super)); |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2318 | generation = btrfs_super_generation(disk_super); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2319 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 2320 | tree_root->node = read_tree_block(tree_root, |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2321 | btrfs_super_root(disk_super), |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2322 | blocksize, generation); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2323 | if (!tree_root->node || |
| 2324 | !test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) { |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 2325 | printk(KERN_WARNING "btrfs: failed to read tree root on %s\n", |
| 2326 | sb->s_id); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2327 | |
| 2328 | goto recovery_tree_root; |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 2329 | } |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2330 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2331 | btrfs_set_root_node(&tree_root->root_item, tree_root->node); |
| 2332 | tree_root->commit_root = btrfs_root_node(tree_root); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2333 | |
| 2334 | ret = find_and_setup_root(tree_root, fs_info, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 2335 | BTRFS_EXTENT_TREE_OBJECTID, extent_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2336 | if (ret) |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2337 | goto recovery_tree_root; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2338 | extent_root->track_dirty = 1; |
| 2339 | |
| 2340 | ret = find_and_setup_root(tree_root, fs_info, |
| 2341 | BTRFS_DEV_TREE_OBJECTID, dev_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2342 | if (ret) |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2343 | goto recovery_tree_root; |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2344 | dev_root->track_dirty = 1; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 2345 | |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2346 | ret = find_and_setup_root(tree_root, fs_info, |
| 2347 | BTRFS_CSUM_TREE_OBJECTID, csum_root); |
| 2348 | if (ret) |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2349 | goto recovery_tree_root; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2350 | |
| 2351 | csum_root->track_dirty = 1; |
| 2352 | |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2353 | fs_info->generation = generation; |
| 2354 | fs_info->last_trans_committed = generation; |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2355 | |
liubo | c59021f | 2011-03-07 02:13:14 +0000 | [diff] [blame] | 2356 | ret = btrfs_init_space_info(fs_info); |
| 2357 | if (ret) { |
| 2358 | printk(KERN_ERR "Failed to initial space info: %d\n", ret); |
| 2359 | goto fail_block_groups; |
| 2360 | } |
| 2361 | |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 2362 | ret = btrfs_read_block_groups(extent_root); |
| 2363 | if (ret) { |
| 2364 | printk(KERN_ERR "Failed to read block groups: %d\n", ret); |
| 2365 | goto fail_block_groups; |
| 2366 | } |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 2367 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2368 | fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, |
| 2369 | "btrfs-cleaner"); |
Qinghuang Feng | 57506d5 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2370 | if (IS_ERR(fs_info->cleaner_kthread)) |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 2371 | goto fail_block_groups; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2372 | |
| 2373 | fs_info->transaction_kthread = kthread_run(transaction_kthread, |
| 2374 | tree_root, |
| 2375 | "btrfs-transaction"); |
Qinghuang Feng | 57506d5 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2376 | if (IS_ERR(fs_info->transaction_kthread)) |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2377 | goto fail_cleaner; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2378 | |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 2379 | if (!btrfs_test_opt(tree_root, SSD) && |
| 2380 | !btrfs_test_opt(tree_root, NOSSD) && |
| 2381 | !fs_info->fs_devices->rotating) { |
| 2382 | printk(KERN_INFO "Btrfs detected SSD devices, enabling SSD " |
| 2383 | "mode\n"); |
| 2384 | btrfs_set_opt(fs_info->mount_opt, SSD); |
| 2385 | } |
| 2386 | |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 2387 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
| 2388 | if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { |
| 2389 | ret = btrfsic_mount(tree_root, fs_devices, |
| 2390 | btrfs_test_opt(tree_root, |
| 2391 | CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? |
| 2392 | 1 : 0, |
| 2393 | fs_info->check_integrity_print_mask); |
| 2394 | if (ret) |
| 2395 | printk(KERN_WARNING "btrfs: failed to initialize" |
| 2396 | " integrity check module %s\n", sb->s_id); |
| 2397 | } |
| 2398 | #endif |
| 2399 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2400 | /* do not make disk changes in broken FS */ |
| 2401 | if (btrfs_super_log_root(disk_super) != 0 && |
| 2402 | !(fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR)) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2403 | u64 bytenr = btrfs_super_log_root(disk_super); |
Chris Mason | d18a2c4 | 2008-04-04 15:40:00 -0400 | [diff] [blame] | 2404 | |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2405 | if (fs_devices->rw_devices == 0) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2406 | printk(KERN_WARNING "Btrfs log replay required " |
| 2407 | "on RO media\n"); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2408 | err = -EIO; |
| 2409 | goto fail_trans_kthread; |
| 2410 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2411 | blocksize = |
| 2412 | btrfs_level_size(tree_root, |
| 2413 | btrfs_super_log_root_level(disk_super)); |
| 2414 | |
Al Viro | 6f07e42 | 2011-11-17 00:46:16 -0500 | [diff] [blame] | 2415 | log_tree_root = btrfs_alloc_root(fs_info); |
Dan Carpenter | 676e4c8 | 2010-05-29 09:43:07 +0000 | [diff] [blame] | 2416 | if (!log_tree_root) { |
| 2417 | err = -ENOMEM; |
| 2418 | goto fail_trans_kthread; |
| 2419 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2420 | |
| 2421 | __setup_root(nodesize, leafsize, sectorsize, stripesize, |
| 2422 | log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); |
| 2423 | |
| 2424 | log_tree_root->node = read_tree_block(tree_root, bytenr, |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2425 | blocksize, |
| 2426 | generation + 1); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2427 | /* returns with log_tree_root freed on success */ |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2428 | ret = btrfs_recover_log_trees(log_tree_root); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2429 | if (ret) { |
| 2430 | btrfs_error(tree_root->fs_info, ret, |
| 2431 | "Failed to recover log tree"); |
| 2432 | free_extent_buffer(log_tree_root->node); |
| 2433 | kfree(log_tree_root); |
| 2434 | goto fail_trans_kthread; |
| 2435 | } |
Yan Zheng | e556ce2 | 2008-11-20 10:25:19 -0500 | [diff] [blame] | 2436 | |
| 2437 | if (sb->s_flags & MS_RDONLY) { |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2438 | ret = btrfs_commit_super(tree_root); |
| 2439 | if (ret) |
| 2440 | goto fail_trans_kthread; |
Yan Zheng | e556ce2 | 2008-11-20 10:25:19 -0500 | [diff] [blame] | 2441 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2442 | } |
Zheng Yan | 1a40e23 | 2008-09-26 10:09:34 -0400 | [diff] [blame] | 2443 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2444 | ret = btrfs_find_orphan_roots(tree_root); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2445 | if (ret) |
| 2446 | goto fail_trans_kthread; |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2447 | |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2448 | if (!(sb->s_flags & MS_RDONLY)) { |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2449 | ret = btrfs_cleanup_fs_roots(fs_info); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2450 | if (ret) { |
| 2451 | } |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2452 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2453 | ret = btrfs_recover_relocation(tree_root); |
Miao Xie | d7ce584 | 2010-02-02 08:46:44 +0000 | [diff] [blame] | 2454 | if (ret < 0) { |
| 2455 | printk(KERN_WARNING |
| 2456 | "btrfs: failed to recover relocation\n"); |
| 2457 | err = -EINVAL; |
| 2458 | goto fail_trans_kthread; |
| 2459 | } |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2460 | } |
Zheng Yan | 1a40e23 | 2008-09-26 10:09:34 -0400 | [diff] [blame] | 2461 | |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 2462 | location.objectid = BTRFS_FS_TREE_OBJECTID; |
| 2463 | location.type = BTRFS_ROOT_ITEM_KEY; |
| 2464 | location.offset = (u64)-1; |
| 2465 | |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 2466 | fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); |
| 2467 | if (!fs_info->fs_root) |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2468 | goto fail_trans_kthread; |
Dan Carpenter | 3140c9a | 2010-05-29 09:44:10 +0000 | [diff] [blame] | 2469 | if (IS_ERR(fs_info->fs_root)) { |
| 2470 | err = PTR_ERR(fs_info->fs_root); |
| 2471 | goto fail_trans_kthread; |
| 2472 | } |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 2473 | |
Josef Bacik | e3acc2a | 2010-01-26 14:30:53 +0000 | [diff] [blame] | 2474 | if (!(sb->s_flags & MS_RDONLY)) { |
| 2475 | down_read(&fs_info->cleanup_work_sem); |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 2476 | err = btrfs_orphan_cleanup(fs_info->fs_root); |
| 2477 | if (!err) |
| 2478 | err = btrfs_orphan_cleanup(fs_info->tree_root); |
Josef Bacik | e3acc2a | 2010-01-26 14:30:53 +0000 | [diff] [blame] | 2479 | up_read(&fs_info->cleanup_work_sem); |
Ilya Dryomov | 5964101 | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 2480 | |
| 2481 | if (!err) |
| 2482 | err = btrfs_recover_balance(fs_info->tree_root); |
| 2483 | |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 2484 | if (err) { |
| 2485 | close_ctree(tree_root); |
Al Viro | ad2b2c8 | 2011-11-17 01:10:02 -0500 | [diff] [blame] | 2486 | return err; |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 2487 | } |
Josef Bacik | e3acc2a | 2010-01-26 14:30:53 +0000 | [diff] [blame] | 2488 | } |
| 2489 | |
Al Viro | ad2b2c8 | 2011-11-17 01:10:02 -0500 | [diff] [blame] | 2490 | return 0; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2491 | |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2492 | fail_trans_kthread: |
| 2493 | kthread_stop(fs_info->transaction_kthread); |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2494 | fail_cleaner: |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2495 | kthread_stop(fs_info->cleaner_kthread); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2496 | |
| 2497 | /* |
| 2498 | * make sure we're done with the btree inode before we stop our |
| 2499 | * kthreads |
| 2500 | */ |
| 2501 | filemap_write_and_wait(fs_info->btree_inode->i_mapping); |
| 2502 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); |
| 2503 | |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 2504 | fail_block_groups: |
| 2505 | btrfs_free_block_groups(fs_info); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2506 | |
| 2507 | fail_tree_roots: |
| 2508 | free_root_pointers(fs_info, 1); |
| 2509 | |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2510 | fail_sb_buffer: |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2511 | btrfs_stop_workers(&fs_info->generic_worker); |
Chris Mason | 306c8b6 | 2011-11-03 15:21:39 -0400 | [diff] [blame] | 2512 | btrfs_stop_workers(&fs_info->readahead_workers); |
Chris Mason | 247e743 | 2008-07-17 12:53:51 -0400 | [diff] [blame] | 2513 | btrfs_stop_workers(&fs_info->fixup_workers); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2514 | btrfs_stop_workers(&fs_info->delalloc_workers); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 2515 | btrfs_stop_workers(&fs_info->workers); |
| 2516 | btrfs_stop_workers(&fs_info->endio_workers); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2517 | btrfs_stop_workers(&fs_info->endio_meta_workers); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 2518 | btrfs_stop_workers(&fs_info->endio_meta_write_workers); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 2519 | btrfs_stop_workers(&fs_info->endio_write_workers); |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 2520 | btrfs_stop_workers(&fs_info->endio_freespace_worker); |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 2521 | btrfs_stop_workers(&fs_info->submit_workers); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2522 | btrfs_stop_workers(&fs_info->delayed_workers); |
Josef Bacik | bab39bf | 2011-06-30 14:42:28 -0400 | [diff] [blame] | 2523 | btrfs_stop_workers(&fs_info->caching_workers); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2524 | fail_alloc: |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 2525 | fail_iput: |
Ilya Dryomov | 586e46e | 2011-11-09 13:26:37 +0200 | [diff] [blame] | 2526 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
| 2527 | |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2528 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 2529 | iput(fs_info->btree_inode); |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 2530 | fail_bdi: |
Qinghuang Feng | 7e66285 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2531 | bdi_destroy(&fs_info->bdi); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2532 | fail_srcu: |
| 2533 | cleanup_srcu_struct(&fs_info->subvol_srcu); |
Qinghuang Feng | 7e66285 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2534 | fail: |
Ilya Dryomov | 586e46e | 2011-11-09 13:26:37 +0200 | [diff] [blame] | 2535 | btrfs_close_devices(fs_info->fs_devices); |
Al Viro | ad2b2c8 | 2011-11-17 01:10:02 -0500 | [diff] [blame] | 2536 | return err; |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2537 | |
| 2538 | recovery_tree_root: |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2539 | if (!btrfs_test_opt(tree_root, RECOVERY)) |
| 2540 | goto fail_tree_roots; |
| 2541 | |
| 2542 | free_root_pointers(fs_info, 0); |
| 2543 | |
| 2544 | /* don't use the log in recovery mode, it won't be valid */ |
| 2545 | btrfs_set_super_log_root(disk_super, 0); |
| 2546 | |
| 2547 | /* we can't trust the free space cache either */ |
| 2548 | btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); |
| 2549 | |
| 2550 | ret = next_root_backup(fs_info, fs_info->super_copy, |
| 2551 | &num_backups_tried, &backup_index); |
| 2552 | if (ret == -1) |
| 2553 | goto fail_block_groups; |
| 2554 | goto retry_root_backup; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 2555 | } |
| 2556 | |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2557 | static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) |
| 2558 | { |
| 2559 | char b[BDEVNAME_SIZE]; |
| 2560 | |
| 2561 | if (uptodate) { |
| 2562 | set_buffer_uptodate(bh); |
| 2563 | } else { |
David Sterba | 7a36dde | 2011-05-06 15:33:15 +0200 | [diff] [blame] | 2564 | printk_ratelimited(KERN_WARNING "lost page write due to " |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2565 | "I/O error on %s\n", |
| 2566 | bdevname(bh->b_bdev, b)); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 2567 | /* note, we dont' set_buffer_write_io_error because we have |
| 2568 | * our own ways of dealing with the IO errors |
| 2569 | */ |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2570 | clear_buffer_uptodate(bh); |
| 2571 | } |
| 2572 | unlock_buffer(bh); |
| 2573 | put_bh(bh); |
| 2574 | } |
| 2575 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2576 | struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) |
| 2577 | { |
| 2578 | struct buffer_head *bh; |
| 2579 | struct buffer_head *latest = NULL; |
| 2580 | struct btrfs_super_block *super; |
| 2581 | int i; |
| 2582 | u64 transid = 0; |
| 2583 | u64 bytenr; |
| 2584 | |
| 2585 | /* we would like to check all the supers, but that would make |
| 2586 | * a btrfs mount succeed after a mkfs from a different FS. |
| 2587 | * So, we need to add a special mount option to scan for |
| 2588 | * later supers, using BTRFS_SUPER_MIRROR_MAX instead |
| 2589 | */ |
| 2590 | for (i = 0; i < 1; i++) { |
| 2591 | bytenr = btrfs_sb_offset(i); |
| 2592 | if (bytenr + 4096 >= i_size_read(bdev->bd_inode)) |
| 2593 | break; |
| 2594 | bh = __bread(bdev, bytenr / 4096, 4096); |
| 2595 | if (!bh) |
| 2596 | continue; |
| 2597 | |
| 2598 | super = (struct btrfs_super_block *)bh->b_data; |
| 2599 | if (btrfs_super_bytenr(super) != bytenr || |
| 2600 | strncmp((char *)(&super->magic), BTRFS_MAGIC, |
| 2601 | sizeof(super->magic))) { |
| 2602 | brelse(bh); |
| 2603 | continue; |
| 2604 | } |
| 2605 | |
| 2606 | if (!latest || btrfs_super_generation(super) > transid) { |
| 2607 | brelse(latest); |
| 2608 | latest = bh; |
| 2609 | transid = btrfs_super_generation(super); |
| 2610 | } else { |
| 2611 | brelse(bh); |
| 2612 | } |
| 2613 | } |
| 2614 | return latest; |
| 2615 | } |
| 2616 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2617 | /* |
| 2618 | * this should be called twice, once with wait == 0 and |
| 2619 | * once with wait == 1. When wait == 0 is done, all the buffer heads |
| 2620 | * we write are pinned. |
| 2621 | * |
| 2622 | * They are released when wait == 1 is done. |
| 2623 | * max_mirrors must be the same for both runs, and it indicates how |
| 2624 | * many supers on this one device should be written. |
| 2625 | * |
| 2626 | * max_mirrors == 0 means to write them all. |
| 2627 | */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2628 | static int write_dev_supers(struct btrfs_device *device, |
| 2629 | struct btrfs_super_block *sb, |
| 2630 | int do_barriers, int wait, int max_mirrors) |
| 2631 | { |
| 2632 | struct buffer_head *bh; |
| 2633 | int i; |
| 2634 | int ret; |
| 2635 | int errors = 0; |
| 2636 | u32 crc; |
| 2637 | u64 bytenr; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2638 | |
| 2639 | if (max_mirrors == 0) |
| 2640 | max_mirrors = BTRFS_SUPER_MIRROR_MAX; |
| 2641 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2642 | for (i = 0; i < max_mirrors; i++) { |
| 2643 | bytenr = btrfs_sb_offset(i); |
| 2644 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes) |
| 2645 | break; |
| 2646 | |
| 2647 | if (wait) { |
| 2648 | bh = __find_get_block(device->bdev, bytenr / 4096, |
| 2649 | BTRFS_SUPER_INFO_SIZE); |
| 2650 | BUG_ON(!bh); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2651 | wait_on_buffer(bh); |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2652 | if (!buffer_uptodate(bh)) |
| 2653 | errors++; |
| 2654 | |
| 2655 | /* drop our reference */ |
| 2656 | brelse(bh); |
| 2657 | |
| 2658 | /* drop the reference from the wait == 0 run */ |
| 2659 | brelse(bh); |
| 2660 | continue; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2661 | } else { |
| 2662 | btrfs_set_super_bytenr(sb, bytenr); |
| 2663 | |
| 2664 | crc = ~(u32)0; |
| 2665 | crc = btrfs_csum_data(NULL, (char *)sb + |
| 2666 | BTRFS_CSUM_SIZE, crc, |
| 2667 | BTRFS_SUPER_INFO_SIZE - |
| 2668 | BTRFS_CSUM_SIZE); |
| 2669 | btrfs_csum_final(crc, sb->csum); |
| 2670 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2671 | /* |
| 2672 | * one reference for us, and we leave it for the |
| 2673 | * caller |
| 2674 | */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2675 | bh = __getblk(device->bdev, bytenr / 4096, |
| 2676 | BTRFS_SUPER_INFO_SIZE); |
| 2677 | memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); |
| 2678 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2679 | /* one reference for submit_bh */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2680 | get_bh(bh); |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2681 | |
| 2682 | set_buffer_uptodate(bh); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2683 | lock_buffer(bh); |
| 2684 | bh->b_end_io = btrfs_end_buffer_write_sync; |
| 2685 | } |
| 2686 | |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 2687 | /* |
| 2688 | * we fua the first super. The others we allow |
| 2689 | * to go down lazy. |
| 2690 | */ |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 2691 | ret = btrfsic_submit_bh(WRITE_FUA, bh); |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2692 | if (ret) |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2693 | errors++; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2694 | } |
| 2695 | return errors < i ? 0 : -1; |
| 2696 | } |
| 2697 | |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 2698 | /* |
| 2699 | * endio for the write_dev_flush, this will wake anyone waiting |
| 2700 | * for the barrier when it is done |
| 2701 | */ |
| 2702 | static void btrfs_end_empty_barrier(struct bio *bio, int err) |
| 2703 | { |
| 2704 | if (err) { |
| 2705 | if (err == -EOPNOTSUPP) |
| 2706 | set_bit(BIO_EOPNOTSUPP, &bio->bi_flags); |
| 2707 | clear_bit(BIO_UPTODATE, &bio->bi_flags); |
| 2708 | } |
| 2709 | if (bio->bi_private) |
| 2710 | complete(bio->bi_private); |
| 2711 | bio_put(bio); |
| 2712 | } |
| 2713 | |
| 2714 | /* |
| 2715 | * trigger flushes for one the devices. If you pass wait == 0, the flushes are |
| 2716 | * sent down. With wait == 1, it waits for the previous flush. |
| 2717 | * |
| 2718 | * any device where the flush fails with eopnotsupp are flagged as not-barrier |
| 2719 | * capable |
| 2720 | */ |
| 2721 | static int write_dev_flush(struct btrfs_device *device, int wait) |
| 2722 | { |
| 2723 | struct bio *bio; |
| 2724 | int ret = 0; |
| 2725 | |
| 2726 | if (device->nobarriers) |
| 2727 | return 0; |
| 2728 | |
| 2729 | if (wait) { |
| 2730 | bio = device->flush_bio; |
| 2731 | if (!bio) |
| 2732 | return 0; |
| 2733 | |
| 2734 | wait_for_completion(&device->flush_wait); |
| 2735 | |
| 2736 | if (bio_flagged(bio, BIO_EOPNOTSUPP)) { |
| 2737 | printk("btrfs: disabling barriers on dev %s\n", |
| 2738 | device->name); |
| 2739 | device->nobarriers = 1; |
| 2740 | } |
| 2741 | if (!bio_flagged(bio, BIO_UPTODATE)) { |
| 2742 | ret = -EIO; |
| 2743 | } |
| 2744 | |
| 2745 | /* drop the reference from the wait == 0 run */ |
| 2746 | bio_put(bio); |
| 2747 | device->flush_bio = NULL; |
| 2748 | |
| 2749 | return ret; |
| 2750 | } |
| 2751 | |
| 2752 | /* |
| 2753 | * one reference for us, and we leave it for the |
| 2754 | * caller |
| 2755 | */ |
| 2756 | device->flush_bio = NULL;; |
| 2757 | bio = bio_alloc(GFP_NOFS, 0); |
| 2758 | if (!bio) |
| 2759 | return -ENOMEM; |
| 2760 | |
| 2761 | bio->bi_end_io = btrfs_end_empty_barrier; |
| 2762 | bio->bi_bdev = device->bdev; |
| 2763 | init_completion(&device->flush_wait); |
| 2764 | bio->bi_private = &device->flush_wait; |
| 2765 | device->flush_bio = bio; |
| 2766 | |
| 2767 | bio_get(bio); |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 2768 | btrfsic_submit_bio(WRITE_FLUSH, bio); |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 2769 | |
| 2770 | return 0; |
| 2771 | } |
| 2772 | |
| 2773 | /* |
| 2774 | * send an empty flush down to each device in parallel, |
| 2775 | * then wait for them |
| 2776 | */ |
| 2777 | static int barrier_all_devices(struct btrfs_fs_info *info) |
| 2778 | { |
| 2779 | struct list_head *head; |
| 2780 | struct btrfs_device *dev; |
| 2781 | int errors = 0; |
| 2782 | int ret; |
| 2783 | |
| 2784 | /* send down all the barriers */ |
| 2785 | head = &info->fs_devices->devices; |
| 2786 | list_for_each_entry_rcu(dev, head, dev_list) { |
| 2787 | if (!dev->bdev) { |
| 2788 | errors++; |
| 2789 | continue; |
| 2790 | } |
| 2791 | if (!dev->in_fs_metadata || !dev->writeable) |
| 2792 | continue; |
| 2793 | |
| 2794 | ret = write_dev_flush(dev, 0); |
| 2795 | if (ret) |
| 2796 | errors++; |
| 2797 | } |
| 2798 | |
| 2799 | /* wait for all the barriers */ |
| 2800 | list_for_each_entry_rcu(dev, head, dev_list) { |
| 2801 | if (!dev->bdev) { |
| 2802 | errors++; |
| 2803 | continue; |
| 2804 | } |
| 2805 | if (!dev->in_fs_metadata || !dev->writeable) |
| 2806 | continue; |
| 2807 | |
| 2808 | ret = write_dev_flush(dev, 1); |
| 2809 | if (ret) |
| 2810 | errors++; |
| 2811 | } |
| 2812 | if (errors) |
| 2813 | return -EIO; |
| 2814 | return 0; |
| 2815 | } |
| 2816 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2817 | int write_all_supers(struct btrfs_root *root, int max_mirrors) |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2818 | { |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 2819 | struct list_head *head; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2820 | struct btrfs_device *dev; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2821 | struct btrfs_super_block *sb; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2822 | struct btrfs_dev_item *dev_item; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2823 | int ret; |
| 2824 | int do_barriers; |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2825 | int max_errors; |
| 2826 | int total_errors = 0; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2827 | u64 flags; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2828 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2829 | max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2830 | do_barriers = !btrfs_test_opt(root, NOBARRIER); |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2831 | backup_super_roots(root->fs_info); |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2832 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2833 | sb = root->fs_info->super_for_commit; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2834 | dev_item = &sb->dev_item; |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 2835 | |
Chris Mason | 174ba50 | 2011-05-27 10:03:58 -0400 | [diff] [blame] | 2836 | mutex_lock(&root->fs_info->fs_devices->device_list_mutex); |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 2837 | head = &root->fs_info->fs_devices->devices; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 2838 | |
| 2839 | if (do_barriers) |
| 2840 | barrier_all_devices(root->fs_info); |
| 2841 | |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 2842 | list_for_each_entry_rcu(dev, head, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2843 | if (!dev->bdev) { |
| 2844 | total_errors++; |
| 2845 | continue; |
| 2846 | } |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2847 | if (!dev->in_fs_metadata || !dev->writeable) |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2848 | continue; |
| 2849 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2850 | btrfs_set_stack_device_generation(dev_item, 0); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2851 | btrfs_set_stack_device_type(dev_item, dev->type); |
| 2852 | btrfs_set_stack_device_id(dev_item, dev->devid); |
| 2853 | btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes); |
| 2854 | btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used); |
| 2855 | btrfs_set_stack_device_io_align(dev_item, dev->io_align); |
| 2856 | btrfs_set_stack_device_io_width(dev_item, dev->io_width); |
| 2857 | btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); |
| 2858 | memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2859 | memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2860 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2861 | flags = btrfs_super_flags(sb); |
| 2862 | btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2863 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2864 | ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2865 | if (ret) |
| 2866 | total_errors++; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2867 | } |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2868 | if (total_errors > max_errors) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2869 | printk(KERN_ERR "btrfs: %d errors while writing supers\n", |
| 2870 | total_errors); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2871 | |
| 2872 | /* This shouldn't happen. FUA is masked off if unsupported */ |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2873 | BUG(); |
| 2874 | } |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2875 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2876 | total_errors = 0; |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 2877 | list_for_each_entry_rcu(dev, head, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2878 | if (!dev->bdev) |
| 2879 | continue; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2880 | if (!dev->in_fs_metadata || !dev->writeable) |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2881 | continue; |
| 2882 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2883 | ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); |
| 2884 | if (ret) |
| 2885 | total_errors++; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2886 | } |
Chris Mason | 174ba50 | 2011-05-27 10:03:58 -0400 | [diff] [blame] | 2887 | mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2888 | if (total_errors > max_errors) { |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2889 | btrfs_error(root->fs_info, -EIO, |
| 2890 | "%d errors while writing supers", total_errors); |
| 2891 | return -EIO; |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2892 | } |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2893 | return 0; |
| 2894 | } |
| 2895 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2896 | int write_ctree_super(struct btrfs_trans_handle *trans, |
| 2897 | struct btrfs_root *root, int max_mirrors) |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 2898 | { |
Chris Mason | e66f709 | 2007-04-20 13:16:02 -0400 | [diff] [blame] | 2899 | int ret; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 2900 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2901 | ret = write_all_supers(root, max_mirrors); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2902 | return ret; |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 2903 | } |
| 2904 | |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 2905 | /* Kill all outstanding I/O */ |
| 2906 | void btrfs_abort_devices(struct btrfs_root *root) |
| 2907 | { |
| 2908 | struct list_head *head; |
| 2909 | struct btrfs_device *dev; |
| 2910 | mutex_lock(&root->fs_info->fs_devices->device_list_mutex); |
| 2911 | head = &root->fs_info->fs_devices->devices; |
| 2912 | list_for_each_entry_rcu(dev, head, dev_list) { |
| 2913 | blk_abort_queue(dev->bdev->bd_disk->queue); |
| 2914 | } |
| 2915 | mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); |
| 2916 | } |
| 2917 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 2918 | 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] | 2919 | { |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2920 | spin_lock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 2921 | radix_tree_delete(&fs_info->fs_roots_radix, |
| 2922 | (unsigned long)root->root_key.objectid); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2923 | spin_unlock(&fs_info->fs_roots_radix_lock); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2924 | |
| 2925 | if (btrfs_root_refs(&root->root_item) == 0) |
| 2926 | synchronize_srcu(&fs_info->subvol_srcu); |
| 2927 | |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 2928 | __btrfs_remove_free_space_cache(root->free_ino_pinned); |
| 2929 | __btrfs_remove_free_space_cache(root->free_ino_ctl); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2930 | free_fs_root(root); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2931 | } |
| 2932 | |
| 2933 | static void free_fs_root(struct btrfs_root *root) |
| 2934 | { |
Li Zefan | 82d5902 | 2011-04-20 10:33:24 +0800 | [diff] [blame] | 2935 | iput(root->cache_inode); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2936 | WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); |
Al Viro | 0ee5dc6 | 2011-07-07 15:44:25 -0400 | [diff] [blame] | 2937 | if (root->anon_dev) |
| 2938 | free_anon_bdev(root->anon_dev); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2939 | free_extent_buffer(root->node); |
| 2940 | free_extent_buffer(root->commit_root); |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 2941 | kfree(root->free_ino_ctl); |
| 2942 | kfree(root->free_ino_pinned); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2943 | kfree(root->name); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 2944 | kfree(root); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 2945 | } |
| 2946 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 2947 | static void del_fs_roots(struct btrfs_fs_info *fs_info) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2948 | { |
| 2949 | int ret; |
| 2950 | struct btrfs_root *gang[8]; |
| 2951 | int i; |
| 2952 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2953 | while (!list_empty(&fs_info->dead_roots)) { |
| 2954 | gang[0] = list_entry(fs_info->dead_roots.next, |
| 2955 | struct btrfs_root, root_list); |
| 2956 | list_del(&gang[0]->root_list); |
| 2957 | |
| 2958 | if (gang[0]->in_radix) { |
| 2959 | btrfs_free_fs_root(fs_info, gang[0]); |
| 2960 | } else { |
| 2961 | free_extent_buffer(gang[0]->node); |
| 2962 | free_extent_buffer(gang[0]->commit_root); |
| 2963 | kfree(gang[0]); |
| 2964 | } |
| 2965 | } |
| 2966 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2967 | while (1) { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2968 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
| 2969 | (void **)gang, 0, |
| 2970 | ARRAY_SIZE(gang)); |
| 2971 | if (!ret) |
| 2972 | break; |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 2973 | for (i = 0; i < ret; i++) |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 2974 | btrfs_free_fs_root(fs_info, gang[i]); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2975 | } |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2976 | } |
Chris Mason | b4100d6 | 2007-04-12 12:14:00 -0400 | [diff] [blame] | 2977 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2978 | int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) |
| 2979 | { |
| 2980 | u64 root_objectid = 0; |
| 2981 | struct btrfs_root *gang[8]; |
| 2982 | int i; |
| 2983 | int ret; |
| 2984 | |
| 2985 | while (1) { |
| 2986 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
| 2987 | (void **)gang, root_objectid, |
| 2988 | ARRAY_SIZE(gang)); |
| 2989 | if (!ret) |
| 2990 | break; |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2991 | |
| 2992 | root_objectid = gang[ret - 1]->root_key.objectid + 1; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2993 | for (i = 0; i < ret; i++) { |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 2994 | int err; |
| 2995 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2996 | root_objectid = gang[i]->root_key.objectid; |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 2997 | err = btrfs_orphan_cleanup(gang[i]); |
| 2998 | if (err) |
| 2999 | return err; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3000 | } |
| 3001 | root_objectid++; |
| 3002 | } |
| 3003 | return 0; |
| 3004 | } |
| 3005 | |
| 3006 | int btrfs_commit_super(struct btrfs_root *root) |
| 3007 | { |
| 3008 | struct btrfs_trans_handle *trans; |
| 3009 | int ret; |
| 3010 | |
| 3011 | mutex_lock(&root->fs_info->cleaner_mutex); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 3012 | btrfs_run_delayed_iputs(root); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3013 | btrfs_clean_old_snapshots(root); |
| 3014 | mutex_unlock(&root->fs_info->cleaner_mutex); |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 3015 | |
| 3016 | /* wait until ongoing cleanup work done */ |
| 3017 | down_write(&root->fs_info->cleanup_work_sem); |
| 3018 | up_write(&root->fs_info->cleanup_work_sem); |
| 3019 | |
Josef Bacik | 7a7eaa4 | 2011-04-13 12:54:33 -0400 | [diff] [blame] | 3020 | trans = btrfs_join_transaction(root); |
Tsutomu Itoh | 3612b49 | 2011-01-25 02:51:38 +0000 | [diff] [blame] | 3021 | if (IS_ERR(trans)) |
| 3022 | return PTR_ERR(trans); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3023 | ret = btrfs_commit_transaction(trans, root); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3024 | if (ret) |
| 3025 | return ret; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3026 | /* run commit again to drop the original snapshot */ |
Josef Bacik | 7a7eaa4 | 2011-04-13 12:54:33 -0400 | [diff] [blame] | 3027 | trans = btrfs_join_transaction(root); |
Tsutomu Itoh | 3612b49 | 2011-01-25 02:51:38 +0000 | [diff] [blame] | 3028 | if (IS_ERR(trans)) |
| 3029 | return PTR_ERR(trans); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3030 | ret = btrfs_commit_transaction(trans, root); |
| 3031 | if (ret) |
| 3032 | return ret; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3033 | ret = btrfs_write_and_wait_transaction(NULL, root); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3034 | if (ret) { |
| 3035 | btrfs_error(root->fs_info, ret, |
| 3036 | "Failed to sync btree inode to disk."); |
| 3037 | return ret; |
| 3038 | } |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3039 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 3040 | ret = write_ctree_super(NULL, root, 0); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3041 | return ret; |
| 3042 | } |
| 3043 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 3044 | int close_ctree(struct btrfs_root *root) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3045 | { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 3046 | struct btrfs_fs_info *fs_info = root->fs_info; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3047 | int ret; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 3048 | |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 3049 | fs_info->closing = 1; |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 3050 | smp_mb(); |
| 3051 | |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 3052 | /* pause restriper - we want to resume on mount */ |
| 3053 | btrfs_pause_balance(root->fs_info); |
| 3054 | |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 3055 | btrfs_scrub_cancel(root); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 3056 | |
| 3057 | /* wait for any defraggers to finish */ |
| 3058 | wait_event(fs_info->transaction_wait, |
| 3059 | (atomic_read(&fs_info->defrag_running) == 0)); |
| 3060 | |
| 3061 | /* clear out the rbtree of defraggable inodes */ |
Al Viro | e3029d9 | 2011-11-17 00:56:18 -0500 | [diff] [blame] | 3062 | btrfs_run_defrag_inodes(fs_info); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 3063 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3064 | /* |
| 3065 | * Here come 2 situations when btrfs is broken to flip readonly: |
| 3066 | * |
| 3067 | * 1. when btrfs flips readonly somewhere else before |
| 3068 | * btrfs_commit_super, sb->s_flags has MS_RDONLY flag, |
| 3069 | * and btrfs will skip to write sb directly to keep |
| 3070 | * ERROR state on disk. |
| 3071 | * |
| 3072 | * 2. when btrfs flips readonly just in btrfs_commit_super, |
Justin P. Mattock | ae0e47f | 2011-03-01 15:06:02 +0100 | [diff] [blame] | 3073 | * and in such case, btrfs cannot write sb via btrfs_commit_super, |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3074 | * and since fs_state has been set BTRFS_SUPER_FLAG_ERROR flag, |
| 3075 | * btrfs will cleanup all FS resources first and write sb then. |
| 3076 | */ |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3077 | if (!(fs_info->sb->s_flags & MS_RDONLY)) { |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3078 | ret = btrfs_commit_super(root); |
| 3079 | if (ret) |
| 3080 | printk(KERN_ERR "btrfs: commit super ret %d\n", ret); |
| 3081 | } |
| 3082 | |
| 3083 | if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { |
| 3084 | ret = btrfs_error_commit_super(root); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3085 | if (ret) |
| 3086 | printk(KERN_ERR "btrfs: commit super ret %d\n", ret); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3087 | } |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 3088 | |
Josef Bacik | 300e4f8 | 2011-08-29 14:06:00 -0400 | [diff] [blame] | 3089 | btrfs_put_block_group_cache(fs_info); |
| 3090 | |
Al Viro | e3029d9 | 2011-11-17 00:56:18 -0500 | [diff] [blame] | 3091 | kthread_stop(fs_info->transaction_kthread); |
| 3092 | kthread_stop(fs_info->cleaner_kthread); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 3093 | |
Yan Zheng | f25784b | 2009-07-28 08:41:57 -0400 | [diff] [blame] | 3094 | fs_info->closing = 2; |
| 3095 | smp_mb(); |
| 3096 | |
Chris Mason | b0c68f8 | 2008-01-31 11:05:37 -0500 | [diff] [blame] | 3097 | if (fs_info->delalloc_bytes) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3098 | printk(KERN_INFO "btrfs: at unmount delalloc count %llu\n", |
Joel Becker | 2138093 | 2009-04-21 12:38:29 -0700 | [diff] [blame] | 3099 | (unsigned long long)fs_info->delalloc_bytes); |
Chris Mason | b0c68f8 | 2008-01-31 11:05:37 -0500 | [diff] [blame] | 3100 | } |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 3101 | if (fs_info->total_ref_cache_size) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3102 | printk(KERN_INFO "btrfs: at umount reference cache size %llu\n", |
| 3103 | (unsigned long long)fs_info->total_ref_cache_size); |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 3104 | } |
Yan | bcc63ab | 2008-07-30 16:29:20 -0400 | [diff] [blame] | 3105 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 3106 | free_extent_buffer(fs_info->extent_root->node); |
| 3107 | free_extent_buffer(fs_info->extent_root->commit_root); |
| 3108 | free_extent_buffer(fs_info->tree_root->node); |
| 3109 | free_extent_buffer(fs_info->tree_root->commit_root); |
Al Viro | e3029d9 | 2011-11-17 00:56:18 -0500 | [diff] [blame] | 3110 | free_extent_buffer(fs_info->chunk_root->node); |
| 3111 | free_extent_buffer(fs_info->chunk_root->commit_root); |
| 3112 | free_extent_buffer(fs_info->dev_root->node); |
| 3113 | free_extent_buffer(fs_info->dev_root->commit_root); |
| 3114 | free_extent_buffer(fs_info->csum_root->node); |
| 3115 | free_extent_buffer(fs_info->csum_root->commit_root); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 3116 | |
Al Viro | e3029d9 | 2011-11-17 00:56:18 -0500 | [diff] [blame] | 3117 | btrfs_free_block_groups(fs_info); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3118 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 3119 | del_fs_roots(fs_info); |
Chris Mason | d10c5f3 | 2007-12-17 20:14:04 -0500 | [diff] [blame] | 3120 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 3121 | iput(fs_info->btree_inode); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 3122 | |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 3123 | btrfs_stop_workers(&fs_info->generic_worker); |
Chris Mason | 247e743 | 2008-07-17 12:53:51 -0400 | [diff] [blame] | 3124 | btrfs_stop_workers(&fs_info->fixup_workers); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 3125 | btrfs_stop_workers(&fs_info->delalloc_workers); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 3126 | btrfs_stop_workers(&fs_info->workers); |
| 3127 | btrfs_stop_workers(&fs_info->endio_workers); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 3128 | btrfs_stop_workers(&fs_info->endio_meta_workers); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 3129 | btrfs_stop_workers(&fs_info->endio_meta_write_workers); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 3130 | btrfs_stop_workers(&fs_info->endio_write_workers); |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 3131 | btrfs_stop_workers(&fs_info->endio_freespace_worker); |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 3132 | btrfs_stop_workers(&fs_info->submit_workers); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 3133 | btrfs_stop_workers(&fs_info->delayed_workers); |
Josef Bacik | bab39bf | 2011-06-30 14:42:28 -0400 | [diff] [blame] | 3134 | btrfs_stop_workers(&fs_info->caching_workers); |
Arne Jansen | 90519d6 | 2011-05-23 14:30:00 +0200 | [diff] [blame] | 3135 | btrfs_stop_workers(&fs_info->readahead_workers); |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 3136 | |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 3137 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
| 3138 | if (btrfs_test_opt(root, CHECK_INTEGRITY)) |
| 3139 | btrfsic_unmount(root, fs_info->fs_devices); |
| 3140 | #endif |
| 3141 | |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 3142 | btrfs_close_devices(fs_info->fs_devices); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 3143 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
Chris Mason | b248a41 | 2008-04-14 09:48:18 -0400 | [diff] [blame] | 3144 | |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 3145 | bdi_destroy(&fs_info->bdi); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 3146 | cleanup_srcu_struct(&fs_info->subvol_srcu); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 3147 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3148 | return 0; |
| 3149 | } |
| 3150 | |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 3151 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, |
| 3152 | int atomic) |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 3153 | { |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3154 | int ret; |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 3155 | struct inode *btree_inode = buf->pages[0]->mapping->host; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3156 | |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 3157 | ret = extent_buffer_uptodate(buf); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3158 | if (!ret) |
| 3159 | return ret; |
| 3160 | |
| 3161 | ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, |
Chris Mason | b9fab91 | 2012-05-06 07:23:47 -0400 | [diff] [blame] | 3162 | parent_transid, atomic); |
| 3163 | if (ret == -EAGAIN) |
| 3164 | return ret; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 3165 | return !ret; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 3166 | } |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 3167 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 3168 | int btrfs_set_buffer_uptodate(struct extent_buffer *buf) |
| 3169 | { |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 3170 | return set_extent_buffer_uptodate(buf); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 3171 | } |
| 3172 | |
| 3173 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf) |
| 3174 | { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 3175 | struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 3176 | u64 transid = btrfs_header_generation(buf); |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 3177 | int was_dirty; |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 3178 | |
Chris Mason | b9447ef | 2009-03-09 11:45:38 -0400 | [diff] [blame] | 3179 | btrfs_assert_tree_locked(buf); |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 3180 | if (transid != root->fs_info->generation) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3181 | printk(KERN_CRIT "btrfs transid mismatch buffer %llu, " |
| 3182 | "found %llu running %llu\n", |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 3183 | (unsigned long long)buf->start, |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3184 | (unsigned long long)transid, |
| 3185 | (unsigned long long)root->fs_info->generation); |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 3186 | WARN_ON(1); |
| 3187 | } |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 3188 | was_dirty = set_extent_buffer_dirty(buf); |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 3189 | if (!was_dirty) { |
| 3190 | spin_lock(&root->fs_info->delalloc_lock); |
| 3191 | root->fs_info->dirty_metadata_bytes += buf->len; |
| 3192 | spin_unlock(&root->fs_info->delalloc_lock); |
| 3193 | } |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3194 | } |
| 3195 | |
Chris Mason | d3c2fdcf | 2007-09-17 10:58:06 -0400 | [diff] [blame] | 3196 | void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 3197 | { |
Chris Mason | 188de64 | 2008-05-09 11:52:25 -0400 | [diff] [blame] | 3198 | /* |
| 3199 | * looks as though older kernels can get into trouble with |
| 3200 | * this code, they end up stuck in balance_dirty_pages forever |
| 3201 | */ |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 3202 | u64 num_dirty; |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 3203 | unsigned long thresh = 32 * 1024 * 1024; |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 3204 | |
Jens Axboe | 6933c02 | 2009-03-17 09:36:37 +0100 | [diff] [blame] | 3205 | if (current->flags & PF_MEMALLOC) |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 3206 | return; |
| 3207 | |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 3208 | btrfs_balance_delayed_items(root); |
| 3209 | |
| 3210 | num_dirty = root->fs_info->dirty_metadata_bytes; |
| 3211 | |
| 3212 | if (num_dirty > thresh) { |
| 3213 | balance_dirty_pages_ratelimited_nr( |
| 3214 | root->fs_info->btree_inode->i_mapping, 1); |
| 3215 | } |
| 3216 | return; |
| 3217 | } |
| 3218 | |
| 3219 | void __btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) |
| 3220 | { |
| 3221 | /* |
| 3222 | * looks as though older kernels can get into trouble with |
| 3223 | * this code, they end up stuck in balance_dirty_pages forever |
| 3224 | */ |
| 3225 | u64 num_dirty; |
| 3226 | unsigned long thresh = 32 * 1024 * 1024; |
| 3227 | |
| 3228 | if (current->flags & PF_MEMALLOC) |
| 3229 | return; |
| 3230 | |
Chris Mason | 585ad2c | 2009-05-18 10:41:58 -0400 | [diff] [blame] | 3231 | num_dirty = root->fs_info->dirty_metadata_bytes; |
| 3232 | |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 3233 | if (num_dirty > thresh) { |
| 3234 | balance_dirty_pages_ratelimited_nr( |
Chris Mason | d7fc640 | 2008-02-18 12:12:38 -0500 | [diff] [blame] | 3235 | root->fs_info->btree_inode->i_mapping, 1); |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 3236 | } |
Chris Mason | 188de64 | 2008-05-09 11:52:25 -0400 | [diff] [blame] | 3237 | return; |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 3238 | } |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 3239 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 3240 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 3241 | { |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 3242 | struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; |
Josef Bacik | 0b32f4b | 2012-03-13 09:38:00 -0400 | [diff] [blame] | 3243 | return btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 3244 | } |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 3245 | |
Chris Mason | 01d658f | 2011-11-01 10:08:06 -0400 | [diff] [blame] | 3246 | static int btree_lock_page_hook(struct page *page, void *data, |
| 3247 | void (*flush_fn)(void *)) |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 3248 | { |
| 3249 | struct inode *inode = page->mapping->host; |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 3250 | struct btrfs_root *root = BTRFS_I(inode)->root; |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 3251 | struct extent_buffer *eb; |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 3252 | |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 3253 | /* |
| 3254 | * We culled this eb but the page is still hanging out on the mapping, |
| 3255 | * carry on. |
| 3256 | */ |
| 3257 | if (!PagePrivate(page)) |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 3258 | goto out; |
| 3259 | |
Josef Bacik | 4f2de97a | 2012-03-07 16:20:05 -0500 | [diff] [blame] | 3260 | eb = (struct extent_buffer *)page->private; |
| 3261 | if (!eb) { |
| 3262 | WARN_ON(1); |
| 3263 | goto out; |
| 3264 | } |
| 3265 | if (page != eb->pages[0]) |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 3266 | goto out; |
| 3267 | |
Chris Mason | 01d658f | 2011-11-01 10:08:06 -0400 | [diff] [blame] | 3268 | if (!btrfs_try_tree_write_lock(eb)) { |
| 3269 | flush_fn(data); |
| 3270 | btrfs_tree_lock(eb); |
| 3271 | } |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 3272 | btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN); |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 3273 | |
| 3274 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)) { |
| 3275 | spin_lock(&root->fs_info->delalloc_lock); |
| 3276 | if (root->fs_info->dirty_metadata_bytes >= eb->len) |
| 3277 | root->fs_info->dirty_metadata_bytes -= eb->len; |
| 3278 | else |
| 3279 | WARN_ON(1); |
| 3280 | spin_unlock(&root->fs_info->delalloc_lock); |
| 3281 | } |
| 3282 | |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 3283 | btrfs_tree_unlock(eb); |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 3284 | out: |
Chris Mason | 01d658f | 2011-11-01 10:08:06 -0400 | [diff] [blame] | 3285 | if (!trylock_page(page)) { |
| 3286 | flush_fn(data); |
| 3287 | lock_page(page); |
| 3288 | } |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 3289 | return 0; |
| 3290 | } |
| 3291 | |
David Sterba | fcd1f065 | 2012-03-06 00:06:18 +0100 | [diff] [blame] | 3292 | static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3293 | int read_only) |
| 3294 | { |
David Sterba | fcd1f065 | 2012-03-06 00:06:18 +0100 | [diff] [blame] | 3295 | if (btrfs_super_csum_type(fs_info->super_copy) >= ARRAY_SIZE(btrfs_csum_sizes)) { |
| 3296 | printk(KERN_ERR "btrfs: unsupported checksum algorithm\n"); |
| 3297 | return -EINVAL; |
| 3298 | } |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3299 | |
David Sterba | fcd1f065 | 2012-03-06 00:06:18 +0100 | [diff] [blame] | 3300 | if (read_only) |
| 3301 | return 0; |
| 3302 | |
| 3303 | if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3304 | printk(KERN_WARNING "warning: mount fs with errors, " |
| 3305 | "running btrfsck is recommended\n"); |
David Sterba | fcd1f065 | 2012-03-06 00:06:18 +0100 | [diff] [blame] | 3306 | } |
| 3307 | |
| 3308 | return 0; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3309 | } |
| 3310 | |
| 3311 | int btrfs_error_commit_super(struct btrfs_root *root) |
| 3312 | { |
| 3313 | int ret; |
| 3314 | |
| 3315 | mutex_lock(&root->fs_info->cleaner_mutex); |
| 3316 | btrfs_run_delayed_iputs(root); |
| 3317 | mutex_unlock(&root->fs_info->cleaner_mutex); |
| 3318 | |
| 3319 | down_write(&root->fs_info->cleanup_work_sem); |
| 3320 | up_write(&root->fs_info->cleanup_work_sem); |
| 3321 | |
| 3322 | /* cleanup FS via transaction */ |
| 3323 | btrfs_cleanup_transaction(root); |
| 3324 | |
| 3325 | ret = write_ctree_super(NULL, root, 0); |
| 3326 | |
| 3327 | return ret; |
| 3328 | } |
| 3329 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 3330 | static void btrfs_destroy_ordered_operations(struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3331 | { |
| 3332 | struct btrfs_inode *btrfs_inode; |
| 3333 | struct list_head splice; |
| 3334 | |
| 3335 | INIT_LIST_HEAD(&splice); |
| 3336 | |
| 3337 | mutex_lock(&root->fs_info->ordered_operations_mutex); |
| 3338 | spin_lock(&root->fs_info->ordered_extent_lock); |
| 3339 | |
| 3340 | list_splice_init(&root->fs_info->ordered_operations, &splice); |
| 3341 | while (!list_empty(&splice)) { |
| 3342 | btrfs_inode = list_entry(splice.next, struct btrfs_inode, |
| 3343 | ordered_operations); |
| 3344 | |
| 3345 | list_del_init(&btrfs_inode->ordered_operations); |
| 3346 | |
| 3347 | btrfs_invalidate_inodes(btrfs_inode->root); |
| 3348 | } |
| 3349 | |
| 3350 | spin_unlock(&root->fs_info->ordered_extent_lock); |
| 3351 | mutex_unlock(&root->fs_info->ordered_operations_mutex); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3352 | } |
| 3353 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 3354 | static void btrfs_destroy_ordered_extents(struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3355 | { |
| 3356 | struct list_head splice; |
| 3357 | struct btrfs_ordered_extent *ordered; |
| 3358 | struct inode *inode; |
| 3359 | |
| 3360 | INIT_LIST_HEAD(&splice); |
| 3361 | |
| 3362 | spin_lock(&root->fs_info->ordered_extent_lock); |
| 3363 | |
| 3364 | list_splice_init(&root->fs_info->ordered_extents, &splice); |
| 3365 | while (!list_empty(&splice)) { |
| 3366 | ordered = list_entry(splice.next, struct btrfs_ordered_extent, |
| 3367 | root_extent_list); |
| 3368 | |
| 3369 | list_del_init(&ordered->root_extent_list); |
| 3370 | atomic_inc(&ordered->refs); |
| 3371 | |
| 3372 | /* the inode may be getting freed (in sys_unlink path). */ |
| 3373 | inode = igrab(ordered->inode); |
| 3374 | |
| 3375 | spin_unlock(&root->fs_info->ordered_extent_lock); |
| 3376 | if (inode) |
| 3377 | iput(inode); |
| 3378 | |
| 3379 | atomic_set(&ordered->refs, 1); |
| 3380 | btrfs_put_ordered_extent(ordered); |
| 3381 | |
| 3382 | spin_lock(&root->fs_info->ordered_extent_lock); |
| 3383 | } |
| 3384 | |
| 3385 | spin_unlock(&root->fs_info->ordered_extent_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3386 | } |
| 3387 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3388 | int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
| 3389 | struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3390 | { |
| 3391 | struct rb_node *node; |
| 3392 | struct btrfs_delayed_ref_root *delayed_refs; |
| 3393 | struct btrfs_delayed_ref_node *ref; |
| 3394 | int ret = 0; |
| 3395 | |
| 3396 | delayed_refs = &trans->delayed_refs; |
| 3397 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3398 | again: |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3399 | spin_lock(&delayed_refs->lock); |
| 3400 | if (delayed_refs->num_entries == 0) { |
David Sterba | cfece4d | 2011-04-25 19:43:52 -0400 | [diff] [blame] | 3401 | spin_unlock(&delayed_refs->lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3402 | printk(KERN_INFO "delayed_refs has NO entry\n"); |
| 3403 | return ret; |
| 3404 | } |
| 3405 | |
| 3406 | node = rb_first(&delayed_refs->root); |
| 3407 | while (node) { |
| 3408 | ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node); |
| 3409 | node = rb_next(node); |
| 3410 | |
| 3411 | ref->in_tree = 0; |
| 3412 | rb_erase(&ref->rb_node, &delayed_refs->root); |
| 3413 | delayed_refs->num_entries--; |
| 3414 | |
| 3415 | atomic_set(&ref->refs, 1); |
| 3416 | if (btrfs_delayed_ref_is_head(ref)) { |
| 3417 | struct btrfs_delayed_ref_head *head; |
| 3418 | |
| 3419 | head = btrfs_delayed_node_to_head(ref); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3420 | spin_unlock(&delayed_refs->lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3421 | mutex_lock(&head->mutex); |
| 3422 | kfree(head->extent_op); |
| 3423 | delayed_refs->num_heads--; |
| 3424 | if (list_empty(&head->cluster)) |
| 3425 | delayed_refs->num_heads_ready--; |
| 3426 | list_del_init(&head->cluster); |
| 3427 | mutex_unlock(&head->mutex); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3428 | btrfs_put_delayed_ref(ref); |
| 3429 | goto again; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3430 | } |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3431 | spin_unlock(&delayed_refs->lock); |
| 3432 | btrfs_put_delayed_ref(ref); |
| 3433 | |
| 3434 | cond_resched(); |
| 3435 | spin_lock(&delayed_refs->lock); |
| 3436 | } |
| 3437 | |
| 3438 | spin_unlock(&delayed_refs->lock); |
| 3439 | |
| 3440 | return ret; |
| 3441 | } |
| 3442 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 3443 | static void btrfs_destroy_pending_snapshots(struct btrfs_transaction *t) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3444 | { |
| 3445 | struct btrfs_pending_snapshot *snapshot; |
| 3446 | struct list_head splice; |
| 3447 | |
| 3448 | INIT_LIST_HEAD(&splice); |
| 3449 | |
| 3450 | list_splice_init(&t->pending_snapshots, &splice); |
| 3451 | |
| 3452 | while (!list_empty(&splice)) { |
| 3453 | snapshot = list_entry(splice.next, |
| 3454 | struct btrfs_pending_snapshot, |
| 3455 | list); |
| 3456 | |
| 3457 | list_del_init(&snapshot->list); |
| 3458 | |
| 3459 | kfree(snapshot); |
| 3460 | } |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3461 | } |
| 3462 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 3463 | static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3464 | { |
| 3465 | struct btrfs_inode *btrfs_inode; |
| 3466 | struct list_head splice; |
| 3467 | |
| 3468 | INIT_LIST_HEAD(&splice); |
| 3469 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3470 | spin_lock(&root->fs_info->delalloc_lock); |
David Sterba | 5be7675 | 2011-06-09 10:02:51 +0000 | [diff] [blame] | 3471 | list_splice_init(&root->fs_info->delalloc_inodes, &splice); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3472 | |
| 3473 | while (!list_empty(&splice)) { |
| 3474 | btrfs_inode = list_entry(splice.next, struct btrfs_inode, |
| 3475 | delalloc_inodes); |
| 3476 | |
| 3477 | list_del_init(&btrfs_inode->delalloc_inodes); |
| 3478 | |
| 3479 | btrfs_invalidate_inodes(btrfs_inode->root); |
| 3480 | } |
| 3481 | |
| 3482 | spin_unlock(&root->fs_info->delalloc_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3483 | } |
| 3484 | |
| 3485 | static int btrfs_destroy_marked_extents(struct btrfs_root *root, |
| 3486 | struct extent_io_tree *dirty_pages, |
| 3487 | int mark) |
| 3488 | { |
| 3489 | int ret; |
| 3490 | struct page *page; |
| 3491 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 3492 | struct extent_buffer *eb; |
| 3493 | u64 start = 0; |
| 3494 | u64 end; |
| 3495 | u64 offset; |
| 3496 | unsigned long index; |
| 3497 | |
| 3498 | while (1) { |
| 3499 | ret = find_first_extent_bit(dirty_pages, start, &start, &end, |
| 3500 | mark); |
| 3501 | if (ret) |
| 3502 | break; |
| 3503 | |
| 3504 | clear_extent_bits(dirty_pages, start, end, mark, GFP_NOFS); |
| 3505 | while (start <= end) { |
| 3506 | index = start >> PAGE_CACHE_SHIFT; |
| 3507 | start = (u64)(index + 1) << PAGE_CACHE_SHIFT; |
| 3508 | page = find_get_page(btree_inode->i_mapping, index); |
| 3509 | if (!page) |
| 3510 | continue; |
| 3511 | offset = page_offset(page); |
| 3512 | |
| 3513 | spin_lock(&dirty_pages->buffer_lock); |
| 3514 | eb = radix_tree_lookup( |
| 3515 | &(&BTRFS_I(page->mapping->host)->io_tree)->buffer, |
| 3516 | offset >> PAGE_CACHE_SHIFT); |
| 3517 | spin_unlock(&dirty_pages->buffer_lock); |
| 3518 | if (eb) { |
| 3519 | ret = test_and_clear_bit(EXTENT_BUFFER_DIRTY, |
| 3520 | &eb->bflags); |
| 3521 | atomic_set(&eb->refs, 1); |
| 3522 | } |
| 3523 | if (PageWriteback(page)) |
| 3524 | end_page_writeback(page); |
| 3525 | |
| 3526 | lock_page(page); |
| 3527 | if (PageDirty(page)) { |
| 3528 | clear_page_dirty_for_io(page); |
| 3529 | spin_lock_irq(&page->mapping->tree_lock); |
| 3530 | radix_tree_tag_clear(&page->mapping->page_tree, |
| 3531 | page_index(page), |
| 3532 | PAGECACHE_TAG_DIRTY); |
| 3533 | spin_unlock_irq(&page->mapping->tree_lock); |
| 3534 | } |
| 3535 | |
| 3536 | page->mapping->a_ops->invalidatepage(page, 0); |
| 3537 | unlock_page(page); |
| 3538 | } |
| 3539 | } |
| 3540 | |
| 3541 | return ret; |
| 3542 | } |
| 3543 | |
| 3544 | static int btrfs_destroy_pinned_extent(struct btrfs_root *root, |
| 3545 | struct extent_io_tree *pinned_extents) |
| 3546 | { |
| 3547 | struct extent_io_tree *unpin; |
| 3548 | u64 start; |
| 3549 | u64 end; |
| 3550 | int ret; |
| 3551 | |
| 3552 | unpin = pinned_extents; |
| 3553 | while (1) { |
| 3554 | ret = find_first_extent_bit(unpin, 0, &start, &end, |
| 3555 | EXTENT_DIRTY); |
| 3556 | if (ret) |
| 3557 | break; |
| 3558 | |
| 3559 | /* opt_discard */ |
Li Dongyang | 5378e60 | 2011-03-24 10:24:27 +0000 | [diff] [blame] | 3560 | if (btrfs_test_opt(root, DISCARD)) |
| 3561 | ret = btrfs_error_discard_extent(root, start, |
| 3562 | end + 1 - start, |
| 3563 | NULL); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3564 | |
| 3565 | clear_extent_dirty(unpin, start, end, GFP_NOFS); |
| 3566 | btrfs_error_unpin_extent_range(root, start, end); |
| 3567 | cond_resched(); |
| 3568 | } |
| 3569 | |
| 3570 | return 0; |
| 3571 | } |
| 3572 | |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 3573 | void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, |
| 3574 | struct btrfs_root *root) |
| 3575 | { |
| 3576 | btrfs_destroy_delayed_refs(cur_trans, root); |
| 3577 | btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv, |
| 3578 | cur_trans->dirty_pages.dirty_bytes); |
| 3579 | |
| 3580 | /* FIXME: cleanup wait for commit */ |
| 3581 | cur_trans->in_commit = 1; |
| 3582 | cur_trans->blocked = 1; |
| 3583 | if (waitqueue_active(&root->fs_info->transaction_blocked_wait)) |
| 3584 | wake_up(&root->fs_info->transaction_blocked_wait); |
| 3585 | |
| 3586 | cur_trans->blocked = 0; |
| 3587 | if (waitqueue_active(&root->fs_info->transaction_wait)) |
| 3588 | wake_up(&root->fs_info->transaction_wait); |
| 3589 | |
| 3590 | cur_trans->commit_done = 1; |
| 3591 | if (waitqueue_active(&cur_trans->commit_wait)) |
| 3592 | wake_up(&cur_trans->commit_wait); |
| 3593 | |
| 3594 | btrfs_destroy_pending_snapshots(cur_trans); |
| 3595 | |
| 3596 | btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, |
| 3597 | EXTENT_DIRTY); |
| 3598 | |
| 3599 | /* |
| 3600 | memset(cur_trans, 0, sizeof(*cur_trans)); |
| 3601 | kmem_cache_free(btrfs_transaction_cachep, cur_trans); |
| 3602 | */ |
| 3603 | } |
| 3604 | |
| 3605 | int btrfs_cleanup_transaction(struct btrfs_root *root) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3606 | { |
| 3607 | struct btrfs_transaction *t; |
| 3608 | LIST_HEAD(list); |
| 3609 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3610 | mutex_lock(&root->fs_info->transaction_kthread_mutex); |
| 3611 | |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 3612 | spin_lock(&root->fs_info->trans_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3613 | list_splice_init(&root->fs_info->trans_list, &list); |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 3614 | root->fs_info->trans_no_join = 1; |
| 3615 | spin_unlock(&root->fs_info->trans_lock); |
| 3616 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3617 | while (!list_empty(&list)) { |
| 3618 | t = list_entry(list.next, struct btrfs_transaction, list); |
| 3619 | if (!t) |
| 3620 | break; |
| 3621 | |
| 3622 | btrfs_destroy_ordered_operations(root); |
| 3623 | |
| 3624 | btrfs_destroy_ordered_extents(root); |
| 3625 | |
| 3626 | btrfs_destroy_delayed_refs(t, root); |
| 3627 | |
| 3628 | btrfs_block_rsv_release(root, |
| 3629 | &root->fs_info->trans_block_rsv, |
| 3630 | t->dirty_pages.dirty_bytes); |
| 3631 | |
| 3632 | /* FIXME: cleanup wait for commit */ |
| 3633 | t->in_commit = 1; |
| 3634 | t->blocked = 1; |
| 3635 | if (waitqueue_active(&root->fs_info->transaction_blocked_wait)) |
| 3636 | wake_up(&root->fs_info->transaction_blocked_wait); |
| 3637 | |
| 3638 | t->blocked = 0; |
| 3639 | if (waitqueue_active(&root->fs_info->transaction_wait)) |
| 3640 | wake_up(&root->fs_info->transaction_wait); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3641 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3642 | t->commit_done = 1; |
| 3643 | if (waitqueue_active(&t->commit_wait)) |
| 3644 | wake_up(&t->commit_wait); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3645 | |
| 3646 | btrfs_destroy_pending_snapshots(t); |
| 3647 | |
| 3648 | btrfs_destroy_delalloc_inodes(root); |
| 3649 | |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 3650 | spin_lock(&root->fs_info->trans_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3651 | root->fs_info->running_transaction = NULL; |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 3652 | spin_unlock(&root->fs_info->trans_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3653 | |
| 3654 | btrfs_destroy_marked_extents(root, &t->dirty_pages, |
| 3655 | EXTENT_DIRTY); |
| 3656 | |
| 3657 | btrfs_destroy_pinned_extent(root, |
| 3658 | root->fs_info->pinned_extents); |
| 3659 | |
Josef Bacik | 13c5a93 | 2011-04-11 15:45:29 -0400 | [diff] [blame] | 3660 | atomic_set(&t->use_count, 0); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3661 | list_del_init(&t->list); |
| 3662 | memset(t, 0, sizeof(*t)); |
| 3663 | kmem_cache_free(btrfs_transaction_cachep, t); |
| 3664 | } |
| 3665 | |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 3666 | spin_lock(&root->fs_info->trans_lock); |
| 3667 | root->fs_info->trans_no_join = 0; |
| 3668 | spin_unlock(&root->fs_info->trans_lock); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3669 | mutex_unlock(&root->fs_info->transaction_kthread_mutex); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3670 | |
| 3671 | return 0; |
| 3672 | } |
| 3673 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3674 | static int btree_writepage_io_failed_hook(struct bio *bio, struct page *page, |
| 3675 | u64 start, u64 end, |
| 3676 | struct extent_state *state) |
| 3677 | { |
| 3678 | struct super_block *sb = page->mapping->host->i_sb; |
| 3679 | struct btrfs_fs_info *fs_info = btrfs_sb(sb); |
| 3680 | btrfs_error(fs_info, -EIO, |
| 3681 | "Error occured while writing out btree at %llu", start); |
| 3682 | return -EIO; |
| 3683 | } |
| 3684 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 3685 | static struct extent_io_ops btree_extent_io_ops = { |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 3686 | .write_cache_pages_lock_hook = btree_lock_page_hook, |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 3687 | .readpage_end_io_hook = btree_readpage_end_io_hook, |
Arne Jansen | 4bb31e9 | 2011-06-10 13:55:54 +0200 | [diff] [blame] | 3688 | .readpage_io_failed_hook = btree_io_failed_hook, |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 3689 | .submit_bio_hook = btree_submit_bio_hook, |
Chris Mason | 239b14b | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 3690 | /* note we're sharing with inode.c for the merge bio hook */ |
| 3691 | .merge_bio_hook = btrfs_merge_bio_hook, |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3692 | .writepage_io_failed_hook = btree_writepage_io_failed_hook, |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 3693 | }; |