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 | 4b4e25f | 2008-11-20 10:22:27 -0500 | [diff] [blame] | 31 | #include "compat.h" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 32 | #include "ctree.h" |
| 33 | #include "disk-io.h" |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 34 | #include "transaction.h" |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 35 | #include "btrfs_inode.h" |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 36 | #include "volumes.h" |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 37 | #include "print-tree.h" |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 38 | #include "async-thread.h" |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 39 | #include "locking.h" |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 40 | #include "tree-log.h" |
Chris Mason | fa9c0d7 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 41 | #include "free-space-cache.h" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 42 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 43 | static struct extent_io_ops btree_extent_io_ops; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 44 | static void end_workqueue_fn(struct btrfs_work *work); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 45 | static void free_fs_root(struct btrfs_root *root); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 46 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 47 | /* |
| 48 | * end_io_wq structs are used to do processing in task context when an IO is |
| 49 | * complete. This is used during reads to verify checksums, and it is used |
| 50 | * by writes to insert metadata for new file extents after IO is complete. |
| 51 | */ |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 52 | struct end_io_wq { |
| 53 | struct bio *bio; |
| 54 | bio_end_io_t *end_io; |
| 55 | void *private; |
| 56 | struct btrfs_fs_info *info; |
| 57 | int error; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 58 | int metadata; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 59 | struct list_head list; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 60 | struct btrfs_work work; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 61 | }; |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 62 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 63 | /* |
| 64 | * async submit bios are used to offload expensive checksumming |
| 65 | * onto the worker threads. They checksum file and metadata bios |
| 66 | * just before they are sent down the IO stack. |
| 67 | */ |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 68 | struct async_submit_bio { |
| 69 | struct inode *inode; |
| 70 | struct bio *bio; |
| 71 | struct list_head list; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 72 | extent_submit_bio_hook_t *submit_bio_start; |
| 73 | extent_submit_bio_hook_t *submit_bio_done; |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 74 | int rw; |
| 75 | int mirror_num; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 76 | unsigned long bio_flags; |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 77 | /* |
| 78 | * bio_offset is optional, can be used if the pages in the bio |
| 79 | * can't tell us where in the file the bio should go |
| 80 | */ |
| 81 | u64 bio_offset; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 82 | struct btrfs_work work; |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 83 | }; |
| 84 | |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 85 | /* These are used to set the lockdep class on the extent buffer locks. |
| 86 | * The class is set by the readpage_end_io_hook after the buffer has |
| 87 | * passed csum validation but before the pages are unlocked. |
| 88 | * |
| 89 | * The lockdep class is also set by btrfs_init_new_buffer on freshly |
| 90 | * allocated blocks. |
| 91 | * |
| 92 | * The class is based on the level in the tree block, which allows lockdep |
| 93 | * to know that lower nodes nest inside the locks of higher nodes. |
| 94 | * |
| 95 | * We also add a check to make sure the highest level of the tree is |
| 96 | * the same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this |
| 97 | * code needs update as well. |
| 98 | */ |
| 99 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 100 | # if BTRFS_MAX_LEVEL != 8 |
| 101 | # error |
| 102 | # endif |
| 103 | static struct lock_class_key btrfs_eb_class[BTRFS_MAX_LEVEL + 1]; |
| 104 | static const char *btrfs_eb_name[BTRFS_MAX_LEVEL + 1] = { |
| 105 | /* leaf */ |
| 106 | "btrfs-extent-00", |
| 107 | "btrfs-extent-01", |
| 108 | "btrfs-extent-02", |
| 109 | "btrfs-extent-03", |
| 110 | "btrfs-extent-04", |
| 111 | "btrfs-extent-05", |
| 112 | "btrfs-extent-06", |
| 113 | "btrfs-extent-07", |
| 114 | /* highest possible level */ |
| 115 | "btrfs-extent-08", |
| 116 | }; |
| 117 | #endif |
| 118 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 119 | /* |
| 120 | * extents on the btree inode are pretty simple, there's one extent |
| 121 | * that covers the entire device |
| 122 | */ |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 123 | static struct extent_map *btree_get_extent(struct inode *inode, |
| 124 | struct page *page, size_t page_offset, u64 start, u64 len, |
| 125 | int create) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 126 | { |
| 127 | struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; |
| 128 | struct extent_map *em; |
| 129 | int ret; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 130 | |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 131 | read_lock(&em_tree->lock); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 132 | em = lookup_extent_mapping(em_tree, start, len); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 133 | if (em) { |
| 134 | em->bdev = |
| 135 | BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 136 | read_unlock(&em_tree->lock); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 137 | goto out; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 138 | } |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 139 | read_unlock(&em_tree->lock); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 140 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 141 | em = alloc_extent_map(GFP_NOFS); |
| 142 | if (!em) { |
| 143 | em = ERR_PTR(-ENOMEM); |
| 144 | goto out; |
| 145 | } |
| 146 | em->start = 0; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 147 | em->len = (u64)-1; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 148 | em->block_len = (u64)-1; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 149 | em->block_start = 0; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 150 | em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 151 | |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 152 | write_lock(&em_tree->lock); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 153 | ret = add_extent_mapping(em_tree, em); |
| 154 | if (ret == -EEXIST) { |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 155 | u64 failed_start = em->start; |
| 156 | u64 failed_len = em->len; |
| 157 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 158 | free_extent_map(em); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 159 | em = lookup_extent_mapping(em_tree, start, len); |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 160 | if (em) { |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 161 | ret = 0; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 162 | } else { |
| 163 | em = lookup_extent_mapping(em_tree, failed_start, |
| 164 | failed_len); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 165 | ret = -EIO; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 166 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 167 | } else if (ret) { |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 168 | free_extent_map(em); |
| 169 | em = NULL; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 170 | } |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 171 | write_unlock(&em_tree->lock); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 172 | |
| 173 | if (ret) |
| 174 | em = ERR_PTR(ret); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 175 | out: |
| 176 | return em; |
| 177 | } |
| 178 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 179 | u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len) |
| 180 | { |
David Woodhouse | 163e783 | 2009-04-19 13:02:41 +0100 | [diff] [blame] | 181 | return crc32c(seed, data, len); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | void btrfs_csum_final(u32 crc, char *result) |
| 185 | { |
| 186 | *(__le32 *)result = ~cpu_to_le32(crc); |
| 187 | } |
| 188 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 189 | /* |
| 190 | * compute the csum for a btree block, and either verify it or write it |
| 191 | * into the csum field of the block. |
| 192 | */ |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 193 | static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, |
| 194 | int verify) |
| 195 | { |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 196 | u16 csum_size = |
| 197 | btrfs_super_csum_size(&root->fs_info->super_copy); |
| 198 | char *result = NULL; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 199 | unsigned long len; |
| 200 | unsigned long cur_len; |
| 201 | unsigned long offset = BTRFS_CSUM_SIZE; |
| 202 | char *map_token = NULL; |
| 203 | char *kaddr; |
| 204 | unsigned long map_start; |
| 205 | unsigned long map_len; |
| 206 | int err; |
| 207 | u32 crc = ~(u32)0; |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 208 | unsigned long inline_result; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 209 | |
| 210 | len = buf->len - offset; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 211 | while (len > 0) { |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 212 | err = map_private_extent_buffer(buf, offset, 32, |
| 213 | &map_token, &kaddr, |
| 214 | &map_start, &map_len, KM_USER0); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 215 | if (err) |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 216 | return 1; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 217 | cur_len = min(len, map_len - (offset - map_start)); |
| 218 | crc = btrfs_csum_data(root, kaddr + offset - map_start, |
| 219 | crc, cur_len); |
| 220 | len -= cur_len; |
| 221 | offset += cur_len; |
| 222 | unmap_extent_buffer(buf, map_token, KM_USER0); |
| 223 | } |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 224 | if (csum_size > sizeof(inline_result)) { |
| 225 | result = kzalloc(csum_size * sizeof(char), GFP_NOFS); |
| 226 | if (!result) |
| 227 | return 1; |
| 228 | } else { |
| 229 | result = (char *)&inline_result; |
| 230 | } |
| 231 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 232 | btrfs_csum_final(crc, result); |
| 233 | |
| 234 | if (verify) { |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 235 | if (memcmp_extent_buffer(buf, result, 0, csum_size)) { |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 236 | u32 val; |
| 237 | u32 found = 0; |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 238 | memcpy(&found, result, csum_size); |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 239 | |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 240 | read_extent_buffer(buf, &val, 0, csum_size); |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 241 | if (printk_ratelimit()) { |
| 242 | printk(KERN_INFO "btrfs: %s checksum verify " |
| 243 | "failed on %llu wanted %X found %X " |
| 244 | "level %d\n", |
| 245 | root->fs_info->sb->s_id, |
| 246 | (unsigned long long)buf->start, val, found, |
| 247 | btrfs_header_level(buf)); |
| 248 | } |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 249 | if (result != (char *)&inline_result) |
| 250 | kfree(result); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 251 | return 1; |
| 252 | } |
| 253 | } else { |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 254 | write_extent_buffer(buf, result, 0, csum_size); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 255 | } |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 256 | if (result != (char *)&inline_result) |
| 257 | kfree(result); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 258 | return 0; |
| 259 | } |
| 260 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 261 | /* |
| 262 | * we can't consider a given block up to date unless the transid of the |
| 263 | * block matches the transid in the parent node's pointer. This is how we |
| 264 | * detect blocks that either didn't get written at all or got written |
| 265 | * in the wrong place. |
| 266 | */ |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 267 | static int verify_parent_transid(struct extent_io_tree *io_tree, |
| 268 | struct extent_buffer *eb, u64 parent_transid) |
| 269 | { |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 270 | struct extent_state *cached_state = NULL; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 271 | int ret; |
| 272 | |
| 273 | if (!parent_transid || btrfs_header_generation(eb) == parent_transid) |
| 274 | return 0; |
| 275 | |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 276 | lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, |
| 277 | 0, &cached_state, GFP_NOFS); |
| 278 | if (extent_buffer_uptodate(io_tree, eb, cached_state) && |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 279 | btrfs_header_generation(eb) == parent_transid) { |
| 280 | ret = 0; |
| 281 | goto out; |
| 282 | } |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 283 | if (printk_ratelimit()) { |
| 284 | printk("parent transid verify failed on %llu wanted %llu " |
| 285 | "found %llu\n", |
| 286 | (unsigned long long)eb->start, |
| 287 | (unsigned long long)parent_transid, |
| 288 | (unsigned long long)btrfs_header_generation(eb)); |
| 289 | } |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 290 | ret = 1; |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 291 | clear_extent_buffer_uptodate(io_tree, eb, &cached_state); |
Chris Mason | 33958dc | 2008-07-30 10:29:12 -0400 | [diff] [blame] | 292 | out: |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 293 | unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, |
| 294 | &cached_state, GFP_NOFS); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 295 | return ret; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 296 | } |
| 297 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 298 | /* |
| 299 | * helper to read a given tree block, doing retries as required when |
| 300 | * the checksums don't match and we have alternate mirrors to try. |
| 301 | */ |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 302 | static int btree_read_extent_buffer_pages(struct btrfs_root *root, |
| 303 | struct extent_buffer *eb, |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 304 | u64 start, u64 parent_transid) |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 305 | { |
| 306 | struct extent_io_tree *io_tree; |
| 307 | int ret; |
| 308 | int num_copies = 0; |
| 309 | int mirror_num = 0; |
| 310 | |
| 311 | io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; |
| 312 | while (1) { |
| 313 | ret = read_extent_buffer_pages(io_tree, eb, start, 1, |
| 314 | btree_get_extent, mirror_num); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 315 | if (!ret && |
| 316 | !verify_parent_transid(io_tree, eb, parent_transid)) |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 317 | return ret; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 318 | |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 319 | num_copies = btrfs_num_copies(&root->fs_info->mapping_tree, |
| 320 | eb->start, eb->len); |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 321 | if (num_copies == 1) |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 322 | return ret; |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 323 | |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 324 | mirror_num++; |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 325 | if (mirror_num > num_copies) |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 326 | return ret; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 327 | } |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 328 | return -EIO; |
| 329 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 330 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 331 | /* |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 332 | * checksum a dirty tree block before IO. This has extra checks to make sure |
| 333 | * 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] | 334 | */ |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 335 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 336 | static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 337 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 338 | struct extent_io_tree *tree; |
Chris Mason | 35ebb93 | 2007-10-30 16:56:53 -0400 | [diff] [blame] | 339 | u64 start = (u64)page->index << PAGE_CACHE_SHIFT; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 340 | u64 found_start; |
| 341 | int found_level; |
| 342 | unsigned long len; |
| 343 | struct extent_buffer *eb; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 344 | int ret; |
| 345 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 346 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 347 | |
| 348 | if (page->private == EXTENT_PAGE_PRIVATE) |
| 349 | goto out; |
| 350 | if (!page->private) |
| 351 | goto out; |
| 352 | len = page->private >> 2; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 353 | WARN_ON(len == 0); |
| 354 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 355 | eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS); |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 356 | ret = btree_read_extent_buffer_pages(root, eb, start + PAGE_CACHE_SIZE, |
| 357 | btrfs_header_generation(eb)); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 358 | BUG_ON(ret); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 359 | found_start = btrfs_header_bytenr(eb); |
| 360 | if (found_start != start) { |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 361 | WARN_ON(1); |
| 362 | goto err; |
| 363 | } |
| 364 | if (eb->first_page != page) { |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 365 | WARN_ON(1); |
| 366 | goto err; |
| 367 | } |
| 368 | if (!PageUptodate(page)) { |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 369 | WARN_ON(1); |
| 370 | goto err; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 371 | } |
| 372 | found_level = btrfs_header_level(eb); |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 373 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 374 | csum_tree_block(root, eb, 0); |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 375 | err: |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 376 | free_extent_buffer(eb); |
| 377 | out: |
| 378 | return 0; |
| 379 | } |
| 380 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 381 | static int check_tree_block_fsid(struct btrfs_root *root, |
| 382 | struct extent_buffer *eb) |
| 383 | { |
| 384 | struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; |
| 385 | u8 fsid[BTRFS_UUID_SIZE]; |
| 386 | int ret = 1; |
| 387 | |
| 388 | read_extent_buffer(eb, fsid, (unsigned long)btrfs_header_fsid(eb), |
| 389 | BTRFS_FSID_SIZE); |
| 390 | while (fs_devices) { |
| 391 | if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { |
| 392 | ret = 0; |
| 393 | break; |
| 394 | } |
| 395 | fs_devices = fs_devices->seed; |
| 396 | } |
| 397 | return ret; |
| 398 | } |
| 399 | |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 400 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 401 | void btrfs_set_buffer_lockdep_class(struct extent_buffer *eb, int level) |
| 402 | { |
| 403 | lockdep_set_class_and_name(&eb->lock, |
| 404 | &btrfs_eb_class[level], |
| 405 | btrfs_eb_name[level]); |
| 406 | } |
| 407 | #endif |
| 408 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 409 | static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end, |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 410 | struct extent_state *state) |
| 411 | { |
| 412 | struct extent_io_tree *tree; |
| 413 | u64 found_start; |
| 414 | int found_level; |
| 415 | unsigned long len; |
| 416 | struct extent_buffer *eb; |
| 417 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 418 | int ret = 0; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 419 | |
| 420 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
| 421 | if (page->private == EXTENT_PAGE_PRIVATE) |
| 422 | goto out; |
| 423 | if (!page->private) |
| 424 | goto out; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 425 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 426 | len = page->private >> 2; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 427 | WARN_ON(len == 0); |
| 428 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 429 | eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 430 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 431 | found_start = btrfs_header_bytenr(eb); |
Chris Mason | 23a0786 | 2008-09-12 08:57:47 -0400 | [diff] [blame] | 432 | if (found_start != start) { |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 433 | if (printk_ratelimit()) { |
| 434 | printk(KERN_INFO "btrfs bad tree block start " |
| 435 | "%llu %llu\n", |
| 436 | (unsigned long long)found_start, |
| 437 | (unsigned long long)eb->start); |
| 438 | } |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 439 | ret = -EIO; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 440 | goto err; |
| 441 | } |
| 442 | if (eb->first_page != page) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 443 | printk(KERN_INFO "btrfs bad first page %lu %lu\n", |
| 444 | eb->first_page->index, page->index); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 445 | WARN_ON(1); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 446 | ret = -EIO; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 447 | goto err; |
| 448 | } |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 449 | if (check_tree_block_fsid(root, eb)) { |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 450 | if (printk_ratelimit()) { |
| 451 | printk(KERN_INFO "btrfs bad fsid on block %llu\n", |
| 452 | (unsigned long long)eb->start); |
| 453 | } |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 454 | ret = -EIO; |
| 455 | goto err; |
| 456 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 457 | found_level = btrfs_header_level(eb); |
| 458 | |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 459 | btrfs_set_buffer_lockdep_class(eb, found_level); |
| 460 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 461 | ret = csum_tree_block(root, eb, 1); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 462 | if (ret) |
| 463 | ret = -EIO; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 464 | |
| 465 | end = min_t(u64, eb->len, PAGE_CACHE_SIZE); |
| 466 | end = eb->start + end - 1; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 467 | err: |
| 468 | free_extent_buffer(eb); |
| 469 | out: |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 470 | return ret; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 471 | } |
| 472 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 473 | static void end_workqueue_bio(struct bio *bio, int err) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 474 | { |
| 475 | struct end_io_wq *end_io_wq = bio->bi_private; |
| 476 | struct btrfs_fs_info *fs_info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 477 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 478 | fs_info = end_io_wq->info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 479 | end_io_wq->error = err; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 480 | end_io_wq->work.func = end_workqueue_fn; |
| 481 | end_io_wq->work.flags = 0; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 482 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 483 | if (bio->bi_rw & REQ_WRITE) { |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 484 | if (end_io_wq->metadata) |
| 485 | btrfs_queue_worker(&fs_info->endio_meta_write_workers, |
| 486 | &end_io_wq->work); |
| 487 | else |
| 488 | btrfs_queue_worker(&fs_info->endio_write_workers, |
| 489 | &end_io_wq->work); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 490 | } else { |
| 491 | if (end_io_wq->metadata) |
| 492 | btrfs_queue_worker(&fs_info->endio_meta_workers, |
| 493 | &end_io_wq->work); |
| 494 | else |
| 495 | btrfs_queue_worker(&fs_info->endio_workers, |
| 496 | &end_io_wq->work); |
| 497 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 498 | } |
| 499 | |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 500 | int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, |
| 501 | int metadata) |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 502 | { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 503 | struct end_io_wq *end_io_wq; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 504 | end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); |
| 505 | if (!end_io_wq) |
| 506 | return -ENOMEM; |
| 507 | |
| 508 | end_io_wq->private = bio->bi_private; |
| 509 | end_io_wq->end_io = bio->bi_end_io; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 510 | end_io_wq->info = info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 511 | end_io_wq->error = 0; |
| 512 | end_io_wq->bio = bio; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 513 | end_io_wq->metadata = metadata; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 514 | |
| 515 | bio->bi_private = end_io_wq; |
| 516 | bio->bi_end_io = end_workqueue_bio; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 517 | return 0; |
| 518 | } |
| 519 | |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 520 | unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 521 | { |
| 522 | unsigned long limit = min_t(unsigned long, |
| 523 | info->workers.max_workers, |
| 524 | info->fs_devices->open_devices); |
| 525 | return 256 * limit; |
| 526 | } |
| 527 | |
Chris Mason | 777e6bd | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 528 | int btrfs_congested_async(struct btrfs_fs_info *info, int iodone) |
Chris Mason | 0986fe9 | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 529 | { |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 530 | return atomic_read(&info->nr_async_bios) > |
| 531 | btrfs_async_submit_limit(info); |
Chris Mason | 0986fe9 | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 532 | } |
| 533 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 534 | static void run_one_async_start(struct btrfs_work *work) |
| 535 | { |
| 536 | struct btrfs_fs_info *fs_info; |
| 537 | struct async_submit_bio *async; |
| 538 | |
| 539 | async = container_of(work, struct async_submit_bio, work); |
| 540 | fs_info = BTRFS_I(async->inode)->root->fs_info; |
| 541 | async->submit_bio_start(async->inode, async->rw, async->bio, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 542 | async->mirror_num, async->bio_flags, |
| 543 | async->bio_offset); |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 544 | } |
| 545 | |
| 546 | static void run_one_async_done(struct btrfs_work *work) |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 547 | { |
| 548 | struct btrfs_fs_info *fs_info; |
| 549 | struct async_submit_bio *async; |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 550 | int limit; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 551 | |
| 552 | async = container_of(work, struct async_submit_bio, work); |
| 553 | fs_info = BTRFS_I(async->inode)->root->fs_info; |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 554 | |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 555 | limit = btrfs_async_submit_limit(fs_info); |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 556 | limit = limit * 2 / 3; |
| 557 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 558 | atomic_dec(&fs_info->nr_async_submits); |
Chris Mason | 0986fe9 | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 559 | |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 560 | if (atomic_read(&fs_info->nr_async_submits) < limit && |
| 561 | waitqueue_active(&fs_info->async_submit_wait)) |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 562 | wake_up(&fs_info->async_submit_wait); |
| 563 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 564 | async->submit_bio_done(async->inode, async->rw, async->bio, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 565 | async->mirror_num, async->bio_flags, |
| 566 | async->bio_offset); |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 567 | } |
| 568 | |
| 569 | static void run_one_async_free(struct btrfs_work *work) |
| 570 | { |
| 571 | struct async_submit_bio *async; |
| 572 | |
| 573 | async = container_of(work, struct async_submit_bio, work); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 574 | kfree(async); |
| 575 | } |
| 576 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 577 | int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, |
| 578 | int rw, struct bio *bio, int mirror_num, |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 579 | unsigned long bio_flags, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 580 | u64 bio_offset, |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 581 | extent_submit_bio_hook_t *submit_bio_start, |
| 582 | extent_submit_bio_hook_t *submit_bio_done) |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 583 | { |
| 584 | struct async_submit_bio *async; |
| 585 | |
| 586 | async = kmalloc(sizeof(*async), GFP_NOFS); |
| 587 | if (!async) |
| 588 | return -ENOMEM; |
| 589 | |
| 590 | async->inode = inode; |
| 591 | async->rw = rw; |
| 592 | async->bio = bio; |
| 593 | async->mirror_num = mirror_num; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 594 | async->submit_bio_start = submit_bio_start; |
| 595 | async->submit_bio_done = submit_bio_done; |
| 596 | |
| 597 | async->work.func = run_one_async_start; |
| 598 | async->work.ordered_func = run_one_async_done; |
| 599 | async->work.ordered_free = run_one_async_free; |
| 600 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 601 | async->work.flags = 0; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 602 | async->bio_flags = bio_flags; |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 603 | async->bio_offset = bio_offset; |
Chris Mason | 8c8bee1 | 2008-09-29 11:19:10 -0400 | [diff] [blame] | 604 | |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 605 | atomic_inc(&fs_info->nr_async_submits); |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 606 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 607 | if (rw & REQ_SYNC) |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 608 | btrfs_set_work_high_prio(&async->work); |
| 609 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 610 | btrfs_queue_worker(&fs_info->workers, &async->work); |
Chris Mason | 9473f16 | 2008-08-28 06:15:24 -0400 | [diff] [blame] | 611 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 612 | while (atomic_read(&fs_info->async_submit_draining) && |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 613 | atomic_read(&fs_info->nr_async_submits)) { |
| 614 | wait_event(fs_info->async_submit_wait, |
| 615 | (atomic_read(&fs_info->nr_async_submits) == 0)); |
| 616 | } |
| 617 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 618 | return 0; |
| 619 | } |
| 620 | |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 621 | static int btree_csum_one_bio(struct bio *bio) |
| 622 | { |
| 623 | struct bio_vec *bvec = bio->bi_io_vec; |
| 624 | int bio_index = 0; |
| 625 | struct btrfs_root *root; |
| 626 | |
| 627 | WARN_ON(bio->bi_vcnt <= 0); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 628 | while (bio_index < bio->bi_vcnt) { |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 629 | root = BTRFS_I(bvec->bv_page->mapping->host)->root; |
| 630 | csum_dirty_buffer(root, bvec->bv_page); |
| 631 | bio_index++; |
| 632 | bvec++; |
| 633 | } |
| 634 | return 0; |
| 635 | } |
| 636 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 637 | static int __btree_submit_bio_start(struct inode *inode, int rw, |
| 638 | struct bio *bio, int mirror_num, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 639 | unsigned long bio_flags, |
| 640 | u64 bio_offset) |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 641 | { |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 642 | /* |
| 643 | * 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] | 644 | * submission context. Just jump into btrfs_map_bio |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 645 | */ |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 646 | btree_csum_one_bio(bio); |
| 647 | return 0; |
| 648 | } |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 649 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 650 | 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] | 651 | int mirror_num, unsigned long bio_flags, |
| 652 | u64 bio_offset) |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 653 | { |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 654 | /* |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 655 | * when we're called for a write, we're already in the async |
| 656 | * submission context. Just jump into btrfs_map_bio |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 657 | */ |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 658 | 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] | 659 | } |
| 660 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 661 | 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] | 662 | int mirror_num, unsigned long bio_flags, |
| 663 | u64 bio_offset) |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 664 | { |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 665 | int ret; |
| 666 | |
| 667 | ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, |
| 668 | bio, 1); |
| 669 | BUG_ON(ret); |
| 670 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 671 | if (!(rw & REQ_WRITE)) { |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 672 | /* |
| 673 | * called for a read, do the setup so that checksum validation |
| 674 | * can happen in the async kernel threads |
| 675 | */ |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 676 | return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, |
Chris Mason | 6f3577b | 2008-11-13 09:59:36 -0500 | [diff] [blame] | 677 | mirror_num, 0); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 678 | } |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 679 | |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 680 | /* |
| 681 | * kthread helpers are used to submit writes so that checksumming |
| 682 | * can happen in parallel across all CPUs |
| 683 | */ |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 684 | return btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 685 | inode, rw, bio, mirror_num, 0, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 686 | bio_offset, |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 687 | __btree_submit_bio_start, |
| 688 | __btree_submit_bio_done); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 689 | } |
| 690 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 691 | static int btree_writepage(struct page *page, struct writeback_control *wbc) |
| 692 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 693 | struct extent_io_tree *tree; |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 694 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
| 695 | struct extent_buffer *eb; |
| 696 | int was_dirty; |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 697 | |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 698 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
| 699 | if (!(current->flags & PF_MEMALLOC)) { |
| 700 | return extent_write_full_page(tree, page, |
| 701 | btree_get_extent, wbc); |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 702 | } |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 703 | |
| 704 | redirty_page_for_writepage(wbc, page); |
| 705 | eb = btrfs_find_tree_block(root, page_offset(page), |
| 706 | PAGE_CACHE_SIZE); |
| 707 | WARN_ON(!eb); |
| 708 | |
| 709 | was_dirty = test_and_set_bit(EXTENT_BUFFER_DIRTY, &eb->bflags); |
| 710 | if (!was_dirty) { |
| 711 | spin_lock(&root->fs_info->delalloc_lock); |
| 712 | root->fs_info->dirty_metadata_bytes += PAGE_CACHE_SIZE; |
| 713 | spin_unlock(&root->fs_info->delalloc_lock); |
| 714 | } |
| 715 | free_extent_buffer(eb); |
| 716 | |
| 717 | unlock_page(page); |
| 718 | return 0; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 719 | } |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 720 | |
| 721 | static int btree_writepages(struct address_space *mapping, |
| 722 | struct writeback_control *wbc) |
| 723 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 724 | struct extent_io_tree *tree; |
| 725 | tree = &BTRFS_I(mapping->host)->io_tree; |
Chris Mason | d8d5f3e | 2007-12-11 12:42:00 -0500 | [diff] [blame] | 726 | if (wbc->sync_mode == WB_SYNC_NONE) { |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 727 | struct btrfs_root *root = BTRFS_I(mapping->host)->root; |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 728 | u64 num_dirty; |
Chris Mason | 24ab9cd | 2008-09-24 14:51:30 -0400 | [diff] [blame] | 729 | unsigned long thresh = 32 * 1024 * 1024; |
Chris Mason | 448d640 | 2007-11-27 07:52:01 -0800 | [diff] [blame] | 730 | |
| 731 | if (wbc->for_kupdate) |
| 732 | return 0; |
| 733 | |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 734 | /* this is a bit racy, but that's ok */ |
| 735 | num_dirty = root->fs_info->dirty_metadata_bytes; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 736 | if (num_dirty < thresh) |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 737 | return 0; |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 738 | } |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 739 | return extent_writepages(tree, mapping, btree_get_extent, wbc); |
| 740 | } |
| 741 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 742 | static int btree_readpage(struct file *file, struct page *page) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 743 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 744 | struct extent_io_tree *tree; |
| 745 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 746 | return extent_read_full_page(tree, page, btree_get_extent); |
| 747 | } |
| 748 | |
Chris Mason | 70dec80 | 2008-01-29 09:59:12 -0500 | [diff] [blame] | 749 | static int btree_releasepage(struct page *page, gfp_t gfp_flags) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 750 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 751 | struct extent_io_tree *tree; |
| 752 | struct extent_map_tree *map; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 753 | int ret; |
| 754 | |
Chris Mason | 98509cf | 2008-09-11 15:51:43 -0400 | [diff] [blame] | 755 | if (PageWriteback(page) || PageDirty(page)) |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 756 | return 0; |
Chris Mason | 98509cf | 2008-09-11 15:51:43 -0400 | [diff] [blame] | 757 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 758 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
| 759 | map = &BTRFS_I(page->mapping->host)->extent_tree; |
Chris Mason | 6af118c | 2008-07-22 11:18:07 -0400 | [diff] [blame] | 760 | |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 761 | ret = try_release_extent_state(map, tree, page, gfp_flags); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 762 | if (!ret) |
Chris Mason | 6af118c | 2008-07-22 11:18:07 -0400 | [diff] [blame] | 763 | return 0; |
Chris Mason | 6af118c | 2008-07-22 11:18:07 -0400 | [diff] [blame] | 764 | |
| 765 | ret = try_release_extent_buffer(tree, page); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 766 | if (ret == 1) { |
| 767 | ClearPagePrivate(page); |
| 768 | set_page_private(page, 0); |
| 769 | page_cache_release(page); |
| 770 | } |
Chris Mason | 6af118c | 2008-07-22 11:18:07 -0400 | [diff] [blame] | 771 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 772 | return ret; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 773 | } |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 774 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 775 | static void btree_invalidatepage(struct page *page, unsigned long offset) |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 776 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 777 | struct extent_io_tree *tree; |
| 778 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 779 | extent_invalidatepage(tree, page, offset); |
| 780 | btree_releasepage(page, GFP_NOFS); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 781 | if (PagePrivate(page)) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 782 | printk(KERN_WARNING "btrfs warning page private not zero " |
| 783 | "on page %llu\n", (unsigned long long)page_offset(page)); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 784 | ClearPagePrivate(page); |
| 785 | set_page_private(page, 0); |
| 786 | page_cache_release(page); |
| 787 | } |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 788 | } |
| 789 | |
Alexey Dobriyan | 7f09410 | 2009-09-21 17:01:10 -0700 | [diff] [blame] | 790 | static const struct address_space_operations btree_aops = { |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 791 | .readpage = btree_readpage, |
| 792 | .writepage = btree_writepage, |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 793 | .writepages = btree_writepages, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 794 | .releasepage = btree_releasepage, |
| 795 | .invalidatepage = btree_invalidatepage, |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 796 | .sync_page = block_sync_page, |
| 797 | }; |
| 798 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 799 | int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, |
| 800 | u64 parent_transid) |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 801 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 802 | struct extent_buffer *buf = NULL; |
| 803 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 804 | int ret = 0; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 805 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 806 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 807 | if (!buf) |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 808 | return 0; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 809 | read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 810 | buf, 0, 0, btree_get_extent, 0); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 811 | free_extent_buffer(buf); |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 812 | return ret; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 813 | } |
| 814 | |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 815 | struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, |
| 816 | u64 bytenr, u32 blocksize) |
| 817 | { |
| 818 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 819 | struct extent_buffer *eb; |
| 820 | eb = find_extent_buffer(&BTRFS_I(btree_inode)->io_tree, |
| 821 | bytenr, blocksize, GFP_NOFS); |
| 822 | return eb; |
| 823 | } |
| 824 | |
| 825 | struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, |
| 826 | u64 bytenr, u32 blocksize) |
| 827 | { |
| 828 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 829 | struct extent_buffer *eb; |
| 830 | |
| 831 | eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree, |
| 832 | bytenr, blocksize, NULL, GFP_NOFS); |
| 833 | return eb; |
| 834 | } |
| 835 | |
| 836 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 837 | int btrfs_write_tree_block(struct extent_buffer *buf) |
| 838 | { |
Christoph Hellwig | 8aa38c3 | 2009-10-01 12:58:30 -0400 | [diff] [blame] | 839 | return filemap_fdatawrite_range(buf->first_page->mapping, buf->start, |
| 840 | buf->start + buf->len - 1); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 841 | } |
| 842 | |
| 843 | int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) |
| 844 | { |
Christoph Hellwig | 8aa38c3 | 2009-10-01 12:58:30 -0400 | [diff] [blame] | 845 | return filemap_fdatawait_range(buf->first_page->mapping, |
| 846 | buf->start, buf->start + buf->len - 1); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 847 | } |
| 848 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 849 | struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 850 | u32 blocksize, u64 parent_transid) |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 851 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 852 | struct extent_buffer *buf = NULL; |
| 853 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 854 | struct extent_io_tree *io_tree; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 855 | int ret; |
| 856 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 857 | io_tree = &BTRFS_I(btree_inode)->io_tree; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 858 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 859 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 860 | if (!buf) |
| 861 | return NULL; |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 862 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 863 | ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 864 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 865 | if (ret == 0) |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 866 | set_bit(EXTENT_BUFFER_UPTODATE, &buf->bflags); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 867 | return buf; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 868 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 869 | } |
| 870 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 871 | int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 872 | struct extent_buffer *buf) |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 873 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 874 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 875 | if (btrfs_header_generation(buf) == |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 876 | root->fs_info->running_transaction->transid) { |
Chris Mason | b9447ef | 2009-03-09 11:45:38 -0400 | [diff] [blame] | 877 | btrfs_assert_tree_locked(buf); |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 878 | |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 879 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { |
| 880 | spin_lock(&root->fs_info->delalloc_lock); |
| 881 | if (root->fs_info->dirty_metadata_bytes >= buf->len) |
| 882 | root->fs_info->dirty_metadata_bytes -= buf->len; |
| 883 | else |
| 884 | WARN_ON(1); |
| 885 | spin_unlock(&root->fs_info->delalloc_lock); |
| 886 | } |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 887 | |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 888 | /* ugh, clear_extent_buffer_dirty needs to lock the page */ |
| 889 | btrfs_set_lock_blocking(buf); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 890 | clear_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 891 | buf); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 892 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 893 | return 0; |
| 894 | } |
| 895 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 896 | static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 897 | u32 stripesize, struct btrfs_root *root, |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 898 | struct btrfs_fs_info *fs_info, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 899 | u64 objectid) |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 900 | { |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 901 | root->node = NULL; |
Chris Mason | a28ec19 | 2007-03-06 20:08:01 -0500 | [diff] [blame] | 902 | root->commit_root = NULL; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 903 | root->sectorsize = sectorsize; |
| 904 | root->nodesize = nodesize; |
| 905 | root->leafsize = leafsize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 906 | root->stripesize = stripesize; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 907 | root->ref_cows = 0; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 908 | root->track_dirty = 0; |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 909 | root->in_radix = 0; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 910 | root->orphan_item_inserted = 0; |
| 911 | root->orphan_cleanup_state = 0; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 912 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 913 | root->fs_info = fs_info; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 914 | root->objectid = objectid; |
| 915 | root->last_trans = 0; |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 916 | root->highest_objectid = 0; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 917 | root->name = NULL; |
Chris Mason | 4313b39 | 2008-01-03 09:08:48 -0500 | [diff] [blame] | 918 | root->in_sysfs = 0; |
Eric Paris | 6bef4d3 | 2010-02-23 19:43:04 +0000 | [diff] [blame] | 919 | root->inode_tree = RB_ROOT; |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 920 | root->block_rsv = NULL; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 921 | root->orphan_block_rsv = NULL; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 922 | |
| 923 | INIT_LIST_HEAD(&root->dirty_list); |
Josef Bacik | 7b12876 | 2008-07-24 12:17:14 -0400 | [diff] [blame] | 924 | INIT_LIST_HEAD(&root->orphan_list); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 925 | INIT_LIST_HEAD(&root->root_list); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 926 | spin_lock_init(&root->node_lock); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 927 | spin_lock_init(&root->orphan_lock); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 928 | spin_lock_init(&root->inode_lock); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 929 | spin_lock_init(&root->accounting_lock); |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 930 | mutex_init(&root->objectid_mutex); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 931 | mutex_init(&root->log_mutex); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 932 | init_waitqueue_head(&root->log_writer_wait); |
| 933 | init_waitqueue_head(&root->log_commit_wait[0]); |
| 934 | init_waitqueue_head(&root->log_commit_wait[1]); |
| 935 | atomic_set(&root->log_commit[0], 0); |
| 936 | atomic_set(&root->log_commit[1], 0); |
| 937 | atomic_set(&root->log_writers, 0); |
| 938 | root->log_batch = 0; |
| 939 | root->log_transid = 0; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 940 | root->last_log_commit = 0; |
Chris Mason | d0c803c | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 941 | extent_io_tree_init(&root->dirty_log_pages, |
| 942 | fs_info->btree_inode->i_mapping, GFP_NOFS); |
Chris Mason | 017e536 | 2008-07-28 15:32:51 -0400 | [diff] [blame] | 943 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 944 | memset(&root->root_key, 0, sizeof(root->root_key)); |
| 945 | memset(&root->root_item, 0, sizeof(root->root_item)); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 946 | memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 947 | memset(&root->root_kobj, 0, sizeof(root->root_kobj)); |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 948 | root->defrag_trans_start = fs_info->generation; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 949 | init_completion(&root->kobj_unregister); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 950 | root->defrag_running = 0; |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 951 | root->root_key.objectid = objectid; |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 952 | root->anon_super.s_root = NULL; |
| 953 | root->anon_super.s_dev = 0; |
| 954 | INIT_LIST_HEAD(&root->anon_super.s_list); |
| 955 | INIT_LIST_HEAD(&root->anon_super.s_instances); |
| 956 | init_rwsem(&root->anon_super.s_umount); |
| 957 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 958 | return 0; |
| 959 | } |
| 960 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 961 | static int find_and_setup_root(struct btrfs_root *tree_root, |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 962 | struct btrfs_fs_info *fs_info, |
| 963 | u64 objectid, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 964 | struct btrfs_root *root) |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 965 | { |
| 966 | int ret; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 967 | u32 blocksize; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 968 | u64 generation; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 969 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 970 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 971 | tree_root->sectorsize, tree_root->stripesize, |
| 972 | root, fs_info, objectid); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 973 | ret = btrfs_find_last_root(tree_root, objectid, |
| 974 | &root->root_item, &root->root_key); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 975 | if (ret > 0) |
| 976 | return -ENOENT; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 977 | BUG_ON(ret); |
| 978 | |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 979 | generation = btrfs_root_generation(&root->root_item); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 980 | blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); |
| 981 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 982 | blocksize, generation); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 983 | BUG_ON(!root->node); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 984 | root->commit_root = btrfs_root_node(root); |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 985 | return 0; |
| 986 | } |
| 987 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 988 | static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, |
| 989 | struct btrfs_fs_info *fs_info) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 990 | { |
| 991 | struct btrfs_root *root; |
| 992 | struct btrfs_root *tree_root = fs_info->tree_root; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 993 | struct extent_buffer *leaf; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 994 | |
| 995 | root = kzalloc(sizeof(*root), GFP_NOFS); |
| 996 | if (!root) |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 997 | return ERR_PTR(-ENOMEM); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 998 | |
| 999 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
| 1000 | tree_root->sectorsize, tree_root->stripesize, |
| 1001 | root, fs_info, BTRFS_TREE_LOG_OBJECTID); |
| 1002 | |
| 1003 | root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; |
| 1004 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; |
| 1005 | root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1006 | /* |
| 1007 | * log trees do not get reference counted because they go away |
| 1008 | * before a real commit is actually done. They do store pointers |
| 1009 | * to file data extents, and those reference counts still get |
| 1010 | * updated (along with back refs to the log tree). |
| 1011 | */ |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1012 | root->ref_cows = 0; |
| 1013 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1014 | leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, |
| 1015 | BTRFS_TREE_LOG_OBJECTID, NULL, 0, 0, 0); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1016 | if (IS_ERR(leaf)) { |
| 1017 | kfree(root); |
| 1018 | return ERR_CAST(leaf); |
| 1019 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1020 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1021 | memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); |
| 1022 | btrfs_set_header_bytenr(leaf, leaf->start); |
| 1023 | btrfs_set_header_generation(leaf, trans->transid); |
| 1024 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); |
| 1025 | btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1026 | root->node = leaf; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1027 | |
| 1028 | write_extent_buffer(root->node, root->fs_info->fsid, |
| 1029 | (unsigned long)btrfs_header_fsid(root->node), |
| 1030 | BTRFS_FSID_SIZE); |
| 1031 | btrfs_mark_buffer_dirty(root->node); |
| 1032 | btrfs_tree_unlock(root->node); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1033 | return root; |
| 1034 | } |
| 1035 | |
| 1036 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, |
| 1037 | struct btrfs_fs_info *fs_info) |
| 1038 | { |
| 1039 | struct btrfs_root *log_root; |
| 1040 | |
| 1041 | log_root = alloc_log_tree(trans, fs_info); |
| 1042 | if (IS_ERR(log_root)) |
| 1043 | return PTR_ERR(log_root); |
| 1044 | WARN_ON(fs_info->log_root_tree); |
| 1045 | fs_info->log_root_tree = log_root; |
| 1046 | return 0; |
| 1047 | } |
| 1048 | |
| 1049 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, |
| 1050 | struct btrfs_root *root) |
| 1051 | { |
| 1052 | struct btrfs_root *log_root; |
| 1053 | struct btrfs_inode_item *inode_item; |
| 1054 | |
| 1055 | log_root = alloc_log_tree(trans, root->fs_info); |
| 1056 | if (IS_ERR(log_root)) |
| 1057 | return PTR_ERR(log_root); |
| 1058 | |
| 1059 | log_root->last_trans = trans->transid; |
| 1060 | log_root->root_key.offset = root->root_key.objectid; |
| 1061 | |
| 1062 | inode_item = &log_root->root_item.inode; |
| 1063 | inode_item->generation = cpu_to_le64(1); |
| 1064 | inode_item->size = cpu_to_le64(3); |
| 1065 | inode_item->nlink = cpu_to_le32(1); |
| 1066 | inode_item->nbytes = cpu_to_le64(root->leafsize); |
| 1067 | inode_item->mode = cpu_to_le32(S_IFDIR | 0755); |
| 1068 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1069 | btrfs_set_root_node(&log_root->root_item, log_root->node); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1070 | |
| 1071 | WARN_ON(root->log_root); |
| 1072 | root->log_root = log_root; |
| 1073 | root->log_transid = 0; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 1074 | root->last_log_commit = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1075 | return 0; |
| 1076 | } |
| 1077 | |
| 1078 | struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, |
| 1079 | struct btrfs_key *location) |
| 1080 | { |
| 1081 | struct btrfs_root *root; |
| 1082 | struct btrfs_fs_info *fs_info = tree_root->fs_info; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1083 | struct btrfs_path *path; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1084 | struct extent_buffer *l; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1085 | u64 generation; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1086 | u32 blocksize; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1087 | int ret = 0; |
| 1088 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1089 | root = kzalloc(sizeof(*root), GFP_NOFS); |
Chris Mason | 0cf6c62 | 2007-06-09 09:22:25 -0400 | [diff] [blame] | 1090 | if (!root) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1091 | return ERR_PTR(-ENOMEM); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1092 | if (location->offset == (u64)-1) { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1093 | ret = find_and_setup_root(tree_root, fs_info, |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1094 | location->objectid, root); |
| 1095 | if (ret) { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1096 | kfree(root); |
| 1097 | return ERR_PTR(ret); |
| 1098 | } |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1099 | goto out; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1100 | } |
| 1101 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1102 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1103 | tree_root->sectorsize, tree_root->stripesize, |
| 1104 | root, fs_info, location->objectid); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1105 | |
| 1106 | path = btrfs_alloc_path(); |
| 1107 | BUG_ON(!path); |
| 1108 | ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1109 | if (ret == 0) { |
| 1110 | l = path->nodes[0]; |
| 1111 | read_extent_buffer(l, &root->root_item, |
| 1112 | btrfs_item_ptr_offset(l, path->slots[0]), |
| 1113 | sizeof(root->root_item)); |
| 1114 | memcpy(&root->root_key, location, sizeof(*location)); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1115 | } |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1116 | btrfs_free_path(path); |
| 1117 | if (ret) { |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1118 | if (ret > 0) |
| 1119 | ret = -ENOENT; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1120 | return ERR_PTR(ret); |
| 1121 | } |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1122 | |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1123 | generation = btrfs_root_generation(&root->root_item); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1124 | blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); |
| 1125 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1126 | blocksize, generation); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1127 | root->commit_root = btrfs_root_node(root); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1128 | BUG_ON(!root->node); |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1129 | out: |
| 1130 | if (location->objectid != BTRFS_TREE_LOG_OBJECTID) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1131 | root->ref_cows = 1; |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1132 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1133 | return root; |
| 1134 | } |
| 1135 | |
Chris Mason | dc17ff8 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 1136 | struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, |
| 1137 | u64 root_objectid) |
| 1138 | { |
| 1139 | struct btrfs_root *root; |
| 1140 | |
| 1141 | if (root_objectid == BTRFS_ROOT_TREE_OBJECTID) |
| 1142 | return fs_info->tree_root; |
| 1143 | if (root_objectid == BTRFS_EXTENT_TREE_OBJECTID) |
| 1144 | return fs_info->extent_root; |
| 1145 | |
| 1146 | root = radix_tree_lookup(&fs_info->fs_roots_radix, |
| 1147 | (unsigned long)root_objectid); |
| 1148 | return root; |
| 1149 | } |
| 1150 | |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1151 | struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, |
| 1152 | struct btrfs_key *location) |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1153 | { |
| 1154 | struct btrfs_root *root; |
| 1155 | int ret; |
| 1156 | |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1157 | if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) |
| 1158 | return fs_info->tree_root; |
| 1159 | if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) |
| 1160 | return fs_info->extent_root; |
Chris Mason | 8f18cf1 | 2008-04-25 16:53:30 -0400 | [diff] [blame] | 1161 | if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) |
| 1162 | return fs_info->chunk_root; |
| 1163 | if (location->objectid == BTRFS_DEV_TREE_OBJECTID) |
| 1164 | return fs_info->dev_root; |
Yan Zheng | 0403e47 | 2008-12-10 20:32:51 -0500 | [diff] [blame] | 1165 | if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) |
| 1166 | return fs_info->csum_root; |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1167 | again: |
| 1168 | spin_lock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1169 | root = radix_tree_lookup(&fs_info->fs_roots_radix, |
| 1170 | (unsigned long)location->objectid); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1171 | spin_unlock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1172 | if (root) |
| 1173 | return root; |
| 1174 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1175 | root = btrfs_read_fs_root_no_radix(fs_info->tree_root, location); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1176 | if (IS_ERR(root)) |
| 1177 | return root; |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 1178 | |
| 1179 | set_anon_super(&root->anon_super, NULL); |
| 1180 | |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1181 | if (btrfs_root_refs(&root->root_item) == 0) { |
| 1182 | ret = -ENOENT; |
| 1183 | goto fail; |
| 1184 | } |
| 1185 | |
| 1186 | ret = btrfs_find_orphan_item(fs_info->tree_root, location->objectid); |
| 1187 | if (ret < 0) |
| 1188 | goto fail; |
| 1189 | if (ret == 0) |
| 1190 | root->orphan_item_inserted = 1; |
| 1191 | |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1192 | ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); |
| 1193 | if (ret) |
| 1194 | goto fail; |
| 1195 | |
| 1196 | spin_lock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 1197 | ret = radix_tree_insert(&fs_info->fs_roots_radix, |
| 1198 | (unsigned long)root->root_key.objectid, |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1199 | root); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1200 | if (ret == 0) |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1201 | root->in_radix = 1; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1202 | |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1203 | spin_unlock(&fs_info->fs_roots_radix_lock); |
| 1204 | radix_tree_preload_end(); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1205 | if (ret) { |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1206 | if (ret == -EEXIST) { |
| 1207 | free_fs_root(root); |
| 1208 | goto again; |
| 1209 | } |
| 1210 | goto fail; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1211 | } |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1212 | |
| 1213 | ret = btrfs_find_dead_roots(fs_info->tree_root, |
| 1214 | root->root_key.objectid); |
| 1215 | WARN_ON(ret); |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1216 | return root; |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1217 | fail: |
| 1218 | free_fs_root(root); |
| 1219 | return ERR_PTR(ret); |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1220 | } |
| 1221 | |
| 1222 | struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info, |
| 1223 | struct btrfs_key *location, |
| 1224 | const char *name, int namelen) |
| 1225 | { |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1226 | return btrfs_read_fs_root_no_name(fs_info, location); |
| 1227 | #if 0 |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1228 | struct btrfs_root *root; |
| 1229 | int ret; |
| 1230 | |
| 1231 | root = btrfs_read_fs_root_no_name(fs_info, location); |
| 1232 | if (!root) |
| 1233 | return NULL; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1234 | |
Chris Mason | 4313b39 | 2008-01-03 09:08:48 -0500 | [diff] [blame] | 1235 | if (root->in_sysfs) |
| 1236 | return root; |
| 1237 | |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1238 | ret = btrfs_set_root_name(root, name, namelen); |
| 1239 | if (ret) { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1240 | free_extent_buffer(root->node); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1241 | kfree(root); |
| 1242 | return ERR_PTR(ret); |
| 1243 | } |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1244 | |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1245 | ret = btrfs_sysfs_add_root(root); |
| 1246 | if (ret) { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1247 | free_extent_buffer(root->node); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1248 | kfree(root->name); |
| 1249 | kfree(root); |
| 1250 | return ERR_PTR(ret); |
| 1251 | } |
Chris Mason | 4313b39 | 2008-01-03 09:08:48 -0500 | [diff] [blame] | 1252 | root->in_sysfs = 1; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1253 | return root; |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1254 | #endif |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1255 | } |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1256 | |
| 1257 | static int btrfs_congested_fn(void *congested_data, int bdi_bits) |
| 1258 | { |
| 1259 | struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; |
| 1260 | int ret = 0; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1261 | struct btrfs_device *device; |
| 1262 | struct backing_dev_info *bdi; |
Chris Mason | b7967db | 2009-04-27 07:29:04 -0400 | [diff] [blame] | 1263 | |
Qinghuang Feng | c6e3087 | 2009-01-21 10:59:08 -0500 | [diff] [blame] | 1264 | list_for_each_entry(device, &info->fs_devices->devices, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1265 | if (!device->bdev) |
| 1266 | continue; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1267 | bdi = blk_get_backing_dev_info(device->bdev); |
| 1268 | if (bdi && bdi_congested(bdi, bdi_bits)) { |
| 1269 | ret = 1; |
| 1270 | break; |
| 1271 | } |
| 1272 | } |
| 1273 | return ret; |
| 1274 | } |
| 1275 | |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1276 | /* |
| 1277 | * this unplugs every device on the box, and it is only used when page |
| 1278 | * is null |
| 1279 | */ |
| 1280 | static void __unplug_io_fn(struct backing_dev_info *bdi, struct page *page) |
| 1281 | { |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1282 | struct btrfs_device *device; |
| 1283 | struct btrfs_fs_info *info; |
| 1284 | |
| 1285 | info = (struct btrfs_fs_info *)bdi->unplug_io_data; |
Qinghuang Feng | c6e3087 | 2009-01-21 10:59:08 -0500 | [diff] [blame] | 1286 | list_for_each_entry(device, &info->fs_devices->devices, dev_list) { |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1287 | if (!device->bdev) |
| 1288 | continue; |
| 1289 | |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1290 | bdi = blk_get_backing_dev_info(device->bdev); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1291 | if (bdi->unplug_io_fn) |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1292 | bdi->unplug_io_fn(bdi, page); |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1293 | } |
| 1294 | } |
| 1295 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 1296 | static void btrfs_unplug_io_fn(struct backing_dev_info *bdi, struct page *page) |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1297 | { |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1298 | struct inode *inode; |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1299 | struct extent_map_tree *em_tree; |
| 1300 | struct extent_map *em; |
Chris Mason | bcbfce8 | 2008-04-22 13:26:47 -0400 | [diff] [blame] | 1301 | struct address_space *mapping; |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1302 | u64 offset; |
| 1303 | |
Chris Mason | bcbfce8 | 2008-04-22 13:26:47 -0400 | [diff] [blame] | 1304 | /* the generic O_DIRECT read code does this */ |
Chris Mason | 9f0ba5b | 2008-11-18 10:31:22 -0500 | [diff] [blame] | 1305 | if (1 || !page) { |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1306 | __unplug_io_fn(bdi, page); |
| 1307 | return; |
| 1308 | } |
| 1309 | |
Chris Mason | bcbfce8 | 2008-04-22 13:26:47 -0400 | [diff] [blame] | 1310 | /* |
| 1311 | * page->mapping may change at any time. Get a consistent copy |
| 1312 | * and use that for everything below |
| 1313 | */ |
| 1314 | smp_mb(); |
| 1315 | mapping = page->mapping; |
| 1316 | if (!mapping) |
| 1317 | return; |
| 1318 | |
| 1319 | inode = mapping->host; |
Chris Mason | 240d5d4 | 2008-11-10 13:08:31 -0500 | [diff] [blame] | 1320 | |
| 1321 | /* |
| 1322 | * don't do the expensive searching for a small number of |
| 1323 | * devices |
| 1324 | */ |
| 1325 | if (BTRFS_I(inode)->root->fs_info->fs_devices->open_devices <= 2) { |
| 1326 | __unplug_io_fn(bdi, page); |
| 1327 | return; |
| 1328 | } |
| 1329 | |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1330 | offset = page_offset(page); |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1331 | |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1332 | em_tree = &BTRFS_I(inode)->extent_tree; |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 1333 | read_lock(&em_tree->lock); |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1334 | em = lookup_extent_mapping(em_tree, offset, PAGE_CACHE_SIZE); |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 1335 | read_unlock(&em_tree->lock); |
Chris Mason | 8964222 | 2008-07-24 09:41:53 -0400 | [diff] [blame] | 1336 | if (!em) { |
| 1337 | __unplug_io_fn(bdi, page); |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1338 | return; |
Chris Mason | 8964222 | 2008-07-24 09:41:53 -0400 | [diff] [blame] | 1339 | } |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1340 | |
Chris Mason | 8964222 | 2008-07-24 09:41:53 -0400 | [diff] [blame] | 1341 | if (em->block_start >= EXTENT_MAP_LAST_BYTE) { |
| 1342 | free_extent_map(em); |
| 1343 | __unplug_io_fn(bdi, page); |
| 1344 | return; |
| 1345 | } |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1346 | offset = offset - em->start; |
| 1347 | btrfs_unplug_page(&BTRFS_I(inode)->root->fs_info->mapping_tree, |
| 1348 | em->block_start + offset, page); |
| 1349 | free_extent_map(em); |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1350 | } |
| 1351 | |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 1352 | /* |
| 1353 | * If this fails, caller must call bdi_destroy() to get rid of the |
| 1354 | * bdi again. |
| 1355 | */ |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1356 | static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) |
| 1357 | { |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 1358 | int err; |
| 1359 | |
| 1360 | bdi->capabilities = BDI_CAP_MAP_COPY; |
Jens Axboe | e6d086d | 2010-04-26 10:27:54 +0200 | [diff] [blame] | 1361 | err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY); |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 1362 | if (err) |
| 1363 | return err; |
| 1364 | |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 1365 | bdi->ra_pages = default_backing_dev_info.ra_pages; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1366 | bdi->unplug_io_fn = btrfs_unplug_io_fn; |
| 1367 | bdi->unplug_io_data = info; |
| 1368 | bdi->congested_fn = btrfs_congested_fn; |
| 1369 | bdi->congested_data = info; |
| 1370 | return 0; |
| 1371 | } |
| 1372 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1373 | static int bio_ready_for_csum(struct bio *bio) |
| 1374 | { |
| 1375 | u64 length = 0; |
| 1376 | u64 buf_len = 0; |
| 1377 | u64 start = 0; |
| 1378 | struct page *page; |
| 1379 | struct extent_io_tree *io_tree = NULL; |
| 1380 | struct btrfs_fs_info *info = NULL; |
| 1381 | struct bio_vec *bvec; |
| 1382 | int i; |
| 1383 | int ret; |
| 1384 | |
| 1385 | bio_for_each_segment(bvec, bio, i) { |
| 1386 | page = bvec->bv_page; |
| 1387 | if (page->private == EXTENT_PAGE_PRIVATE) { |
| 1388 | length += bvec->bv_len; |
| 1389 | continue; |
| 1390 | } |
| 1391 | if (!page->private) { |
| 1392 | length += bvec->bv_len; |
| 1393 | continue; |
| 1394 | } |
| 1395 | length = bvec->bv_len; |
| 1396 | buf_len = page->private >> 2; |
| 1397 | start = page_offset(page) + bvec->bv_offset; |
| 1398 | io_tree = &BTRFS_I(page->mapping->host)->io_tree; |
| 1399 | info = BTRFS_I(page->mapping->host)->root->fs_info; |
| 1400 | } |
| 1401 | /* are we fully contained in this bio? */ |
| 1402 | if (buf_len <= length) |
| 1403 | return 1; |
| 1404 | |
| 1405 | ret = extent_range_uptodate(io_tree, start + length, |
| 1406 | start + buf_len - 1); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1407 | return ret; |
| 1408 | } |
| 1409 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1410 | /* |
| 1411 | * called by the kthread helper functions to finally call the bio end_io |
| 1412 | * functions. This is where read checksum verification actually happens |
| 1413 | */ |
| 1414 | static void end_workqueue_fn(struct btrfs_work *work) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1415 | { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1416 | struct bio *bio; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1417 | struct end_io_wq *end_io_wq; |
| 1418 | struct btrfs_fs_info *fs_info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1419 | int error; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1420 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1421 | end_io_wq = container_of(work, struct end_io_wq, work); |
| 1422 | bio = end_io_wq->bio; |
| 1423 | fs_info = end_io_wq->info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1424 | |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 1425 | /* metadata bio reads are special because the whole tree block must |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1426 | * be checksummed at once. This makes sure the entire block is in |
| 1427 | * ram and up to date before trying to verify things. For |
| 1428 | * blocksize <= pagesize, it is basically a noop |
| 1429 | */ |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 1430 | if (!(bio->bi_rw & REQ_WRITE) && end_io_wq->metadata && |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 1431 | !bio_ready_for_csum(bio)) { |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1432 | btrfs_queue_worker(&fs_info->endio_meta_workers, |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1433 | &end_io_wq->work); |
| 1434 | return; |
| 1435 | } |
| 1436 | error = end_io_wq->error; |
| 1437 | bio->bi_private = end_io_wq->private; |
| 1438 | bio->bi_end_io = end_io_wq->end_io; |
| 1439 | kfree(end_io_wq); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1440 | bio_endio(bio, error); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 1441 | } |
| 1442 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1443 | static int cleaner_kthread(void *arg) |
| 1444 | { |
| 1445 | struct btrfs_root *root = arg; |
| 1446 | |
| 1447 | do { |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1448 | vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1449 | |
| 1450 | if (!(root->fs_info->sb->s_flags & MS_RDONLY) && |
| 1451 | mutex_trylock(&root->fs_info->cleaner_mutex)) { |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 1452 | btrfs_run_delayed_iputs(root); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1453 | btrfs_clean_old_snapshots(root); |
| 1454 | mutex_unlock(&root->fs_info->cleaner_mutex); |
| 1455 | } |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1456 | |
| 1457 | if (freezing(current)) { |
| 1458 | refrigerator(); |
| 1459 | } else { |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1460 | set_current_state(TASK_INTERRUPTIBLE); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1461 | if (!kthread_should_stop()) |
| 1462 | schedule(); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1463 | __set_current_state(TASK_RUNNING); |
| 1464 | } |
| 1465 | } while (!kthread_should_stop()); |
| 1466 | return 0; |
| 1467 | } |
| 1468 | |
| 1469 | static int transaction_kthread(void *arg) |
| 1470 | { |
| 1471 | struct btrfs_root *root = arg; |
| 1472 | struct btrfs_trans_handle *trans; |
| 1473 | struct btrfs_transaction *cur; |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1474 | u64 transid; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1475 | unsigned long now; |
| 1476 | unsigned long delay; |
| 1477 | int ret; |
| 1478 | |
| 1479 | do { |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1480 | delay = HZ * 30; |
| 1481 | vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE); |
| 1482 | mutex_lock(&root->fs_info->transaction_kthread_mutex); |
| 1483 | |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1484 | spin_lock(&root->fs_info->new_trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1485 | cur = root->fs_info->running_transaction; |
| 1486 | if (!cur) { |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1487 | spin_unlock(&root->fs_info->new_trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1488 | goto sleep; |
| 1489 | } |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1490 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1491 | now = get_seconds(); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1492 | if (!cur->blocked && |
| 1493 | (now < cur->start_time || now - cur->start_time < 30)) { |
| 1494 | spin_unlock(&root->fs_info->new_trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1495 | delay = HZ * 5; |
| 1496 | goto sleep; |
| 1497 | } |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1498 | transid = cur->transid; |
| 1499 | spin_unlock(&root->fs_info->new_trans_lock); |
Chris Mason | 56bec29 | 2009-03-13 10:10:06 -0400 | [diff] [blame] | 1500 | |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1501 | trans = btrfs_join_transaction(root, 1); |
| 1502 | if (transid == trans->transid) { |
| 1503 | ret = btrfs_commit_transaction(trans, root); |
| 1504 | BUG_ON(ret); |
| 1505 | } else { |
| 1506 | btrfs_end_transaction(trans, root); |
| 1507 | } |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1508 | sleep: |
| 1509 | wake_up_process(root->fs_info->cleaner_kthread); |
| 1510 | mutex_unlock(&root->fs_info->transaction_kthread_mutex); |
| 1511 | |
| 1512 | if (freezing(current)) { |
| 1513 | refrigerator(); |
| 1514 | } else { |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1515 | set_current_state(TASK_INTERRUPTIBLE); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1516 | if (!kthread_should_stop() && |
| 1517 | !btrfs_transaction_blocked(root->fs_info)) |
| 1518 | schedule_timeout(delay); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1519 | __set_current_state(TASK_RUNNING); |
| 1520 | } |
| 1521 | } while (!kthread_should_stop()); |
| 1522 | return 0; |
| 1523 | } |
| 1524 | |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1525 | struct btrfs_root *open_ctree(struct super_block *sb, |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1526 | struct btrfs_fs_devices *fs_devices, |
| 1527 | char *options) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1528 | { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1529 | u32 sectorsize; |
| 1530 | u32 nodesize; |
| 1531 | u32 leafsize; |
| 1532 | u32 blocksize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1533 | u32 stripesize; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1534 | u64 generation; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1535 | u64 features; |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 1536 | struct btrfs_key location; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1537 | struct buffer_head *bh; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1538 | struct btrfs_root *extent_root = kzalloc(sizeof(struct btrfs_root), |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1539 | GFP_NOFS); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1540 | struct btrfs_root *csum_root = kzalloc(sizeof(struct btrfs_root), |
| 1541 | GFP_NOFS); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1542 | struct btrfs_root *tree_root = kzalloc(sizeof(struct btrfs_root), |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1543 | GFP_NOFS); |
Chris Mason | 8790d50 | 2008-04-03 16:29:03 -0400 | [diff] [blame] | 1544 | struct btrfs_fs_info *fs_info = kzalloc(sizeof(*fs_info), |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1545 | GFP_NOFS); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1546 | struct btrfs_root *chunk_root = kzalloc(sizeof(struct btrfs_root), |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1547 | GFP_NOFS); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1548 | struct btrfs_root *dev_root = kzalloc(sizeof(struct btrfs_root), |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1549 | GFP_NOFS); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1550 | struct btrfs_root *log_tree_root; |
| 1551 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1552 | int ret; |
Yan | e58ca02 | 2008-04-01 11:21:34 -0400 | [diff] [blame] | 1553 | int err = -EINVAL; |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 1554 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 1555 | struct btrfs_super_block *disk_super; |
Chris Mason | 8790d50 | 2008-04-03 16:29:03 -0400 | [diff] [blame] | 1556 | |
Jim Meyering | 0463bb4 | 2008-10-01 19:09:04 -0400 | [diff] [blame] | 1557 | if (!extent_root || !tree_root || !fs_info || |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1558 | !chunk_root || !dev_root || !csum_root) { |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1559 | err = -ENOMEM; |
| 1560 | goto fail; |
| 1561 | } |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1562 | |
| 1563 | ret = init_srcu_struct(&fs_info->subvol_srcu); |
| 1564 | if (ret) { |
| 1565 | err = ret; |
| 1566 | goto fail; |
| 1567 | } |
| 1568 | |
| 1569 | ret = setup_bdi(fs_info, &fs_info->bdi); |
| 1570 | if (ret) { |
| 1571 | err = ret; |
| 1572 | goto fail_srcu; |
| 1573 | } |
| 1574 | |
| 1575 | fs_info->btree_inode = new_inode(sb); |
| 1576 | if (!fs_info->btree_inode) { |
| 1577 | err = -ENOMEM; |
| 1578 | goto fail_bdi; |
| 1579 | } |
| 1580 | |
| 1581 | INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); |
Chris Mason | 8fd1779 | 2007-04-19 21:01:03 -0400 | [diff] [blame] | 1582 | INIT_LIST_HEAD(&fs_info->trans_list); |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 1583 | INIT_LIST_HEAD(&fs_info->dead_roots); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 1584 | INIT_LIST_HEAD(&fs_info->delayed_iputs); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1585 | INIT_LIST_HEAD(&fs_info->hashers); |
Chris Mason | ea8c281 | 2008-08-04 23:17:27 -0400 | [diff] [blame] | 1586 | INIT_LIST_HEAD(&fs_info->delalloc_inodes); |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 1587 | INIT_LIST_HEAD(&fs_info->ordered_operations); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 1588 | INIT_LIST_HEAD(&fs_info->caching_block_groups); |
Chris Mason | 1832a6d | 2007-12-21 16:27:21 -0500 | [diff] [blame] | 1589 | spin_lock_init(&fs_info->delalloc_lock); |
Chris Mason | cee36a0 | 2008-01-15 08:40:48 -0500 | [diff] [blame] | 1590 | spin_lock_init(&fs_info->new_trans_lock); |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1591 | spin_lock_init(&fs_info->ref_cache_lock); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1592 | spin_lock_init(&fs_info->fs_roots_radix_lock); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 1593 | spin_lock_init(&fs_info->delayed_iput_lock); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1594 | |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1595 | init_completion(&fs_info->kobj_unregister); |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1596 | fs_info->tree_root = tree_root; |
| 1597 | fs_info->extent_root = extent_root; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1598 | fs_info->csum_root = csum_root; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1599 | fs_info->chunk_root = chunk_root; |
| 1600 | fs_info->dev_root = dev_root; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1601 | fs_info->fs_devices = fs_devices; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1602 | INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 1603 | INIT_LIST_HEAD(&fs_info->space_info); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1604 | btrfs_mapping_init(&fs_info->mapping_tree); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1605 | btrfs_init_block_rsv(&fs_info->global_block_rsv); |
| 1606 | btrfs_init_block_rsv(&fs_info->delalloc_block_rsv); |
| 1607 | btrfs_init_block_rsv(&fs_info->trans_block_rsv); |
| 1608 | btrfs_init_block_rsv(&fs_info->chunk_block_rsv); |
| 1609 | btrfs_init_block_rsv(&fs_info->empty_block_rsv); |
| 1610 | INIT_LIST_HEAD(&fs_info->durable_block_rsv_list); |
| 1611 | mutex_init(&fs_info->durable_block_rsv_mutex); |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 1612 | atomic_set(&fs_info->nr_async_submits, 0); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1613 | atomic_set(&fs_info->async_delalloc_pages, 0); |
Chris Mason | 8c8bee1 | 2008-09-29 11:19:10 -0400 | [diff] [blame] | 1614 | atomic_set(&fs_info->async_submit_draining, 0); |
Chris Mason | 0986fe9 | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 1615 | atomic_set(&fs_info->nr_async_bios, 0); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1616 | fs_info->sb = sb; |
Chris Mason | 6f568d3 | 2008-01-29 16:03:38 -0500 | [diff] [blame] | 1617 | fs_info->max_inline = 8192 * 1024; |
Josef Bacik | 9ed74f2 | 2009-09-11 16:12:44 -0400 | [diff] [blame] | 1618 | fs_info->metadata_ratio = 0; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 1619 | |
Chris Mason | b34b086 | 2008-12-19 15:43:22 -0500 | [diff] [blame] | 1620 | fs_info->thread_pool_size = min_t(unsigned long, |
| 1621 | num_online_cpus() + 2, 8); |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 1622 | |
Chris Mason | 3eaa288 | 2008-07-24 11:57:52 -0400 | [diff] [blame] | 1623 | INIT_LIST_HEAD(&fs_info->ordered_extents); |
| 1624 | spin_lock_init(&fs_info->ordered_extent_lock); |
| 1625 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1626 | sb->s_blocksize = 4096; |
| 1627 | sb->s_blocksize_bits = blksize_bits(4096); |
Jens Axboe | 32a88aa | 2009-09-16 15:02:33 +0200 | [diff] [blame] | 1628 | sb->s_bdi = &fs_info->bdi; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1629 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1630 | fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; |
| 1631 | fs_info->btree_inode->i_nlink = 1; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 1632 | /* |
| 1633 | * we set the i_size on the btree inode to the max possible int. |
| 1634 | * the real end of the address space is determined by all of |
| 1635 | * the devices in the system |
| 1636 | */ |
| 1637 | fs_info->btree_inode->i_size = OFFSET_MAX; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1638 | fs_info->btree_inode->i_mapping->a_ops = &btree_aops; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1639 | fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; |
| 1640 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1641 | RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1642 | extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1643 | fs_info->btree_inode->i_mapping, |
| 1644 | GFP_NOFS); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1645 | extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree, |
| 1646 | GFP_NOFS); |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 1647 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1648 | BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; |
| 1649 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1650 | BTRFS_I(fs_info->btree_inode)->root = tree_root; |
| 1651 | memset(&BTRFS_I(fs_info->btree_inode)->location, 0, |
| 1652 | sizeof(struct btrfs_key)); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1653 | BTRFS_I(fs_info->btree_inode)->dummy_inode = 1; |
Chris Mason | 22b0ebd | 2007-03-30 08:47:31 -0400 | [diff] [blame] | 1654 | insert_inode_hash(fs_info->btree_inode); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1655 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1656 | spin_lock_init(&fs_info->block_group_cache_lock); |
Eric Paris | 6bef4d3 | 2010-02-23 19:43:04 +0000 | [diff] [blame] | 1657 | fs_info->block_group_cache_tree = RB_ROOT; |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1658 | |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 1659 | extent_io_tree_init(&fs_info->freed_extents[0], |
Chris Mason | 7d9eb12 | 2008-07-08 14:19:17 -0400 | [diff] [blame] | 1660 | fs_info->btree_inode->i_mapping, GFP_NOFS); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 1661 | extent_io_tree_init(&fs_info->freed_extents[1], |
| 1662 | fs_info->btree_inode->i_mapping, GFP_NOFS); |
| 1663 | fs_info->pinned_extents = &fs_info->freed_extents[0]; |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 1664 | fs_info->do_barriers = 1; |
Chris Mason | f929574 | 2008-07-17 12:54:14 -0400 | [diff] [blame] | 1665 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1666 | |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 1667 | mutex_init(&fs_info->trans_mutex); |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 1668 | mutex_init(&fs_info->ordered_operations_mutex); |
Chris Mason | 30ae846 | 2007-03-29 09:59:15 -0400 | [diff] [blame] | 1669 | mutex_init(&fs_info->tree_log_mutex); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1670 | mutex_init(&fs_info->chunk_mutex); |
| 1671 | mutex_init(&fs_info->transaction_kthread_mutex); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1672 | mutex_init(&fs_info->cleaner_mutex); |
| 1673 | mutex_init(&fs_info->volume_mutex); |
Yan Zheng | 276e680 | 2009-07-30 09:40:40 -0400 | [diff] [blame] | 1674 | init_rwsem(&fs_info->extent_commit_sem); |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 1675 | init_rwsem(&fs_info->cleanup_work_sem); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1676 | init_rwsem(&fs_info->subvol_sem); |
Chris Mason | fa9c0d7 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 1677 | |
| 1678 | btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); |
| 1679 | btrfs_init_free_cluster(&fs_info->data_alloc_cluster); |
| 1680 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1681 | init_waitqueue_head(&fs_info->transaction_throttle); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1682 | init_waitqueue_head(&fs_info->transaction_wait); |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 1683 | init_waitqueue_head(&fs_info->async_submit_wait); |
Chris Mason | 9a8dd15 | 2007-02-23 08:38:36 -0500 | [diff] [blame] | 1684 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1685 | __setup_root(4096, 4096, 4096, 4096, tree_root, |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 1686 | fs_info, BTRFS_ROOT_TREE_OBJECTID); |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 1687 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1688 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 1689 | bh = btrfs_read_dev_super(fs_devices->latest_bdev); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1690 | if (!bh) |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1691 | goto fail_iput; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1692 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1693 | memcpy(&fs_info->super_copy, bh->b_data, sizeof(fs_info->super_copy)); |
Yan Zheng | 2d69a0f | 2009-01-05 15:43:42 -0500 | [diff] [blame] | 1694 | memcpy(&fs_info->super_for_commit, &fs_info->super_copy, |
| 1695 | sizeof(fs_info->super_for_commit)); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1696 | brelse(bh); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1697 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1698 | memcpy(fs_info->fsid, fs_info->super_copy.fsid, BTRFS_FSID_SIZE); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1699 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1700 | disk_super = &fs_info->super_copy; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1701 | if (!btrfs_super_root(disk_super)) |
Josef Bacik | c6e2bac | 2008-12-02 06:36:10 -0500 | [diff] [blame] | 1702 | goto fail_iput; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1703 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 1704 | ret = btrfs_parse_options(tree_root, options); |
| 1705 | if (ret) { |
| 1706 | err = ret; |
Josef Bacik | c6e2bac | 2008-12-02 06:36:10 -0500 | [diff] [blame] | 1707 | goto fail_iput; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 1708 | } |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1709 | |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1710 | features = btrfs_super_incompat_flags(disk_super) & |
| 1711 | ~BTRFS_FEATURE_INCOMPAT_SUPP; |
| 1712 | if (features) { |
| 1713 | printk(KERN_ERR "BTRFS: couldn't mount because of " |
| 1714 | "unsupported optional features (%Lx).\n", |
Joel Becker | 2138093 | 2009-04-21 12:38:29 -0700 | [diff] [blame] | 1715 | (unsigned long long)features); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1716 | err = -EINVAL; |
Josef Bacik | c6e2bac | 2008-12-02 06:36:10 -0500 | [diff] [blame] | 1717 | goto fail_iput; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1718 | } |
| 1719 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1720 | features = btrfs_super_incompat_flags(disk_super); |
| 1721 | if (!(features & BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF)) { |
| 1722 | features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; |
| 1723 | btrfs_set_super_incompat_flags(disk_super, features); |
| 1724 | } |
| 1725 | |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1726 | features = btrfs_super_compat_ro_flags(disk_super) & |
| 1727 | ~BTRFS_FEATURE_COMPAT_RO_SUPP; |
| 1728 | if (!(sb->s_flags & MS_RDONLY) && features) { |
| 1729 | printk(KERN_ERR "BTRFS: couldn't mount RDWR because of " |
| 1730 | "unsupported option features (%Lx).\n", |
Joel Becker | 2138093 | 2009-04-21 12:38:29 -0700 | [diff] [blame] | 1731 | (unsigned long long)features); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1732 | err = -EINVAL; |
Josef Bacik | c6e2bac | 2008-12-02 06:36:10 -0500 | [diff] [blame] | 1733 | goto fail_iput; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1734 | } |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1735 | |
| 1736 | btrfs_init_workers(&fs_info->generic_worker, |
| 1737 | "genwork", 1, NULL); |
| 1738 | |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 1739 | btrfs_init_workers(&fs_info->workers, "worker", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1740 | fs_info->thread_pool_size, |
| 1741 | &fs_info->generic_worker); |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 1742 | |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1743 | btrfs_init_workers(&fs_info->delalloc_workers, "delalloc", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1744 | fs_info->thread_pool_size, |
| 1745 | &fs_info->generic_worker); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1746 | |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 1747 | btrfs_init_workers(&fs_info->submit_workers, "submit", |
Chris Mason | b720d20 | 2008-08-15 15:34:14 -0400 | [diff] [blame] | 1748 | min_t(u64, fs_devices->num_devices, |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1749 | fs_info->thread_pool_size), |
| 1750 | &fs_info->generic_worker); |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 1751 | |
| 1752 | /* a higher idle thresh on the submit workers makes it much more |
| 1753 | * likely that bios will be send down in a sane order to the |
| 1754 | * devices |
| 1755 | */ |
| 1756 | fs_info->submit_workers.idle_thresh = 64; |
Chris Mason | 5386323 | 2008-08-15 15:34:18 -0400 | [diff] [blame] | 1757 | |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1758 | fs_info->workers.idle_thresh = 16; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 1759 | fs_info->workers.ordered = 1; |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 1760 | |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1761 | fs_info->delalloc_workers.idle_thresh = 2; |
| 1762 | fs_info->delalloc_workers.ordered = 1; |
| 1763 | |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1764 | btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1, |
| 1765 | &fs_info->generic_worker); |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 1766 | btrfs_init_workers(&fs_info->endio_workers, "endio", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1767 | fs_info->thread_pool_size, |
| 1768 | &fs_info->generic_worker); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1769 | btrfs_init_workers(&fs_info->endio_meta_workers, "endio-meta", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1770 | fs_info->thread_pool_size, |
| 1771 | &fs_info->generic_worker); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 1772 | btrfs_init_workers(&fs_info->endio_meta_write_workers, |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1773 | "endio-meta-write", fs_info->thread_pool_size, |
| 1774 | &fs_info->generic_worker); |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 1775 | btrfs_init_workers(&fs_info->endio_write_workers, "endio-write", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1776 | fs_info->thread_pool_size, |
| 1777 | &fs_info->generic_worker); |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 1778 | |
| 1779 | /* |
| 1780 | * endios are largely parallel and should have a very |
| 1781 | * low idle thresh |
| 1782 | */ |
| 1783 | fs_info->endio_workers.idle_thresh = 4; |
Chris Mason | b51912c | 2009-02-04 09:23:24 -0500 | [diff] [blame] | 1784 | fs_info->endio_meta_workers.idle_thresh = 4; |
| 1785 | |
Chris Mason | 9042846 | 2009-08-04 16:56:34 -0400 | [diff] [blame] | 1786 | fs_info->endio_write_workers.idle_thresh = 2; |
| 1787 | fs_info->endio_meta_write_workers.idle_thresh = 2; |
| 1788 | |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 1789 | btrfs_start_workers(&fs_info->workers, 1); |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1790 | btrfs_start_workers(&fs_info->generic_worker, 1); |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 1791 | btrfs_start_workers(&fs_info->submit_workers, 1); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1792 | btrfs_start_workers(&fs_info->delalloc_workers, 1); |
Chris Mason | 247e743 | 2008-07-17 12:53:51 -0400 | [diff] [blame] | 1793 | btrfs_start_workers(&fs_info->fixup_workers, 1); |
Chris Mason | 9042846 | 2009-08-04 16:56:34 -0400 | [diff] [blame] | 1794 | btrfs_start_workers(&fs_info->endio_workers, 1); |
| 1795 | btrfs_start_workers(&fs_info->endio_meta_workers, 1); |
| 1796 | btrfs_start_workers(&fs_info->endio_meta_write_workers, 1); |
| 1797 | btrfs_start_workers(&fs_info->endio_write_workers, 1); |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 1798 | |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 1799 | fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 1800 | fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, |
| 1801 | 4 * 1024 * 1024 / PAGE_CACHE_SIZE); |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 1802 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1803 | nodesize = btrfs_super_nodesize(disk_super); |
| 1804 | leafsize = btrfs_super_leafsize(disk_super); |
| 1805 | sectorsize = btrfs_super_sectorsize(disk_super); |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1806 | stripesize = btrfs_super_stripesize(disk_super); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1807 | tree_root->nodesize = nodesize; |
| 1808 | tree_root->leafsize = leafsize; |
| 1809 | tree_root->sectorsize = sectorsize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1810 | tree_root->stripesize = stripesize; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1811 | |
| 1812 | sb->s_blocksize = sectorsize; |
| 1813 | sb->s_blocksize_bits = blksize_bits(sectorsize); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1814 | |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1815 | if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC, |
| 1816 | sizeof(disk_super->magic))) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1817 | 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] | 1818 | goto fail_sb_buffer; |
| 1819 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1820 | |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1821 | mutex_lock(&fs_info->chunk_mutex); |
Yan Zheng | e4404d6 | 2008-12-12 10:03:26 -0500 | [diff] [blame] | 1822 | ret = btrfs_read_sys_array(tree_root); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1823 | mutex_unlock(&fs_info->chunk_mutex); |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 1824 | if (ret) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1825 | printk(KERN_WARNING "btrfs: failed to read the system " |
| 1826 | "array on %s\n", sb->s_id); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1827 | goto fail_sb_buffer; |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 1828 | } |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1829 | |
| 1830 | blocksize = btrfs_level_size(tree_root, |
| 1831 | btrfs_super_chunk_root_level(disk_super)); |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1832 | generation = btrfs_super_chunk_root_generation(disk_super); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1833 | |
| 1834 | __setup_root(nodesize, leafsize, sectorsize, stripesize, |
| 1835 | chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); |
| 1836 | |
| 1837 | chunk_root->node = read_tree_block(chunk_root, |
| 1838 | btrfs_super_chunk_root(disk_super), |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1839 | blocksize, generation); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1840 | BUG_ON(!chunk_root->node); |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 1841 | if (!test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { |
| 1842 | printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n", |
| 1843 | sb->s_id); |
| 1844 | goto fail_chunk_root; |
| 1845 | } |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1846 | btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); |
| 1847 | chunk_root->commit_root = btrfs_root_node(chunk_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1848 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1849 | read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1850 | (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node), |
| 1851 | BTRFS_UUID_SIZE); |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1852 | |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1853 | mutex_lock(&fs_info->chunk_mutex); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1854 | ret = btrfs_read_chunk_tree(chunk_root); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1855 | mutex_unlock(&fs_info->chunk_mutex); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 1856 | if (ret) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1857 | printk(KERN_WARNING "btrfs: failed to read chunk tree on %s\n", |
| 1858 | sb->s_id); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 1859 | goto fail_chunk_root; |
| 1860 | } |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1861 | |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1862 | btrfs_close_extra_devices(fs_devices); |
| 1863 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1864 | blocksize = btrfs_level_size(tree_root, |
| 1865 | btrfs_super_root_level(disk_super)); |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1866 | generation = btrfs_super_generation(disk_super); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1867 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1868 | tree_root->node = read_tree_block(tree_root, |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1869 | btrfs_super_root(disk_super), |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1870 | blocksize, generation); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1871 | if (!tree_root->node) |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 1872 | goto fail_chunk_root; |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 1873 | if (!test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) { |
| 1874 | printk(KERN_WARNING "btrfs: failed to read tree root on %s\n", |
| 1875 | sb->s_id); |
| 1876 | goto fail_tree_root; |
| 1877 | } |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1878 | btrfs_set_root_node(&tree_root->root_item, tree_root->node); |
| 1879 | tree_root->commit_root = btrfs_root_node(tree_root); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1880 | |
| 1881 | ret = find_and_setup_root(tree_root, fs_info, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1882 | BTRFS_EXTENT_TREE_OBJECTID, extent_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1883 | if (ret) |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1884 | goto fail_tree_root; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1885 | extent_root->track_dirty = 1; |
| 1886 | |
| 1887 | ret = find_and_setup_root(tree_root, fs_info, |
| 1888 | BTRFS_DEV_TREE_OBJECTID, dev_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1889 | if (ret) |
| 1890 | goto fail_extent_root; |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1891 | dev_root->track_dirty = 1; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1892 | |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1893 | ret = find_and_setup_root(tree_root, fs_info, |
| 1894 | BTRFS_CSUM_TREE_OBJECTID, csum_root); |
| 1895 | if (ret) |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1896 | goto fail_dev_root; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1897 | |
| 1898 | csum_root->track_dirty = 1; |
| 1899 | |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1900 | fs_info->generation = generation; |
| 1901 | fs_info->last_trans_committed = generation; |
| 1902 | fs_info->data_alloc_profile = (u64)-1; |
| 1903 | fs_info->metadata_alloc_profile = (u64)-1; |
| 1904 | fs_info->system_alloc_profile = fs_info->metadata_alloc_profile; |
| 1905 | |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 1906 | ret = btrfs_read_block_groups(extent_root); |
| 1907 | if (ret) { |
| 1908 | printk(KERN_ERR "Failed to read block groups: %d\n", ret); |
| 1909 | goto fail_block_groups; |
| 1910 | } |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1911 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1912 | fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, |
| 1913 | "btrfs-cleaner"); |
Qinghuang Feng | 57506d5 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 1914 | if (IS_ERR(fs_info->cleaner_kthread)) |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 1915 | goto fail_block_groups; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1916 | |
| 1917 | fs_info->transaction_kthread = kthread_run(transaction_kthread, |
| 1918 | tree_root, |
| 1919 | "btrfs-transaction"); |
Qinghuang Feng | 57506d5 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 1920 | if (IS_ERR(fs_info->transaction_kthread)) |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1921 | goto fail_cleaner; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1922 | |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 1923 | if (!btrfs_test_opt(tree_root, SSD) && |
| 1924 | !btrfs_test_opt(tree_root, NOSSD) && |
| 1925 | !fs_info->fs_devices->rotating) { |
| 1926 | printk(KERN_INFO "Btrfs detected SSD devices, enabling SSD " |
| 1927 | "mode\n"); |
| 1928 | btrfs_set_opt(fs_info->mount_opt, SSD); |
| 1929 | } |
| 1930 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1931 | if (btrfs_super_log_root(disk_super) != 0) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1932 | u64 bytenr = btrfs_super_log_root(disk_super); |
Chris Mason | d18a2c4 | 2008-04-04 15:40:00 -0400 | [diff] [blame] | 1933 | |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 1934 | if (fs_devices->rw_devices == 0) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1935 | printk(KERN_WARNING "Btrfs log replay required " |
| 1936 | "on RO media\n"); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 1937 | err = -EIO; |
| 1938 | goto fail_trans_kthread; |
| 1939 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1940 | blocksize = |
| 1941 | btrfs_level_size(tree_root, |
| 1942 | btrfs_super_log_root_level(disk_super)); |
| 1943 | |
Dan Carpenter | 676e4c8 | 2010-05-29 09:43:07 +0000 | [diff] [blame] | 1944 | log_tree_root = kzalloc(sizeof(struct btrfs_root), GFP_NOFS); |
| 1945 | if (!log_tree_root) { |
| 1946 | err = -ENOMEM; |
| 1947 | goto fail_trans_kthread; |
| 1948 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1949 | |
| 1950 | __setup_root(nodesize, leafsize, sectorsize, stripesize, |
| 1951 | log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); |
| 1952 | |
| 1953 | log_tree_root->node = read_tree_block(tree_root, bytenr, |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1954 | blocksize, |
| 1955 | generation + 1); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1956 | ret = btrfs_recover_log_trees(log_tree_root); |
| 1957 | BUG_ON(ret); |
Yan Zheng | e556ce2 | 2008-11-20 10:25:19 -0500 | [diff] [blame] | 1958 | |
| 1959 | if (sb->s_flags & MS_RDONLY) { |
| 1960 | ret = btrfs_commit_super(tree_root); |
| 1961 | BUG_ON(ret); |
| 1962 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1963 | } |
Zheng Yan | 1a40e23 | 2008-09-26 10:09:34 -0400 | [diff] [blame] | 1964 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1965 | ret = btrfs_find_orphan_roots(tree_root); |
| 1966 | BUG_ON(ret); |
| 1967 | |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 1968 | if (!(sb->s_flags & MS_RDONLY)) { |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1969 | ret = btrfs_cleanup_fs_roots(fs_info); |
| 1970 | BUG_ON(ret); |
| 1971 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1972 | ret = btrfs_recover_relocation(tree_root); |
Miao Xie | d7ce584 | 2010-02-02 08:46:44 +0000 | [diff] [blame] | 1973 | if (ret < 0) { |
| 1974 | printk(KERN_WARNING |
| 1975 | "btrfs: failed to recover relocation\n"); |
| 1976 | err = -EINVAL; |
| 1977 | goto fail_trans_kthread; |
| 1978 | } |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 1979 | } |
Zheng Yan | 1a40e23 | 2008-09-26 10:09:34 -0400 | [diff] [blame] | 1980 | |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 1981 | location.objectid = BTRFS_FS_TREE_OBJECTID; |
| 1982 | location.type = BTRFS_ROOT_ITEM_KEY; |
| 1983 | location.offset = (u64)-1; |
| 1984 | |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 1985 | fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); |
| 1986 | if (!fs_info->fs_root) |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 1987 | goto fail_trans_kthread; |
Dan Carpenter | 3140c9a | 2010-05-29 09:44:10 +0000 | [diff] [blame] | 1988 | if (IS_ERR(fs_info->fs_root)) { |
| 1989 | err = PTR_ERR(fs_info->fs_root); |
| 1990 | goto fail_trans_kthread; |
| 1991 | } |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 1992 | |
Josef Bacik | e3acc2a | 2010-01-26 14:30:53 +0000 | [diff] [blame] | 1993 | if (!(sb->s_flags & MS_RDONLY)) { |
| 1994 | down_read(&fs_info->cleanup_work_sem); |
| 1995 | btrfs_orphan_cleanup(fs_info->fs_root); |
| 1996 | up_read(&fs_info->cleanup_work_sem); |
| 1997 | } |
| 1998 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1999 | return tree_root; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2000 | |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2001 | fail_trans_kthread: |
| 2002 | kthread_stop(fs_info->transaction_kthread); |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2003 | fail_cleaner: |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2004 | kthread_stop(fs_info->cleaner_kthread); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2005 | |
| 2006 | /* |
| 2007 | * make sure we're done with the btree inode before we stop our |
| 2008 | * kthreads |
| 2009 | */ |
| 2010 | filemap_write_and_wait(fs_info->btree_inode->i_mapping); |
| 2011 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); |
| 2012 | |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 2013 | fail_block_groups: |
| 2014 | btrfs_free_block_groups(fs_info); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2015 | free_extent_buffer(csum_root->node); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2016 | free_extent_buffer(csum_root->commit_root); |
| 2017 | fail_dev_root: |
| 2018 | free_extent_buffer(dev_root->node); |
| 2019 | free_extent_buffer(dev_root->commit_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2020 | fail_extent_root: |
| 2021 | free_extent_buffer(extent_root->node); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2022 | free_extent_buffer(extent_root->commit_root); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2023 | fail_tree_root: |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2024 | free_extent_buffer(tree_root->node); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2025 | free_extent_buffer(tree_root->commit_root); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2026 | fail_chunk_root: |
| 2027 | free_extent_buffer(chunk_root->node); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2028 | free_extent_buffer(chunk_root->commit_root); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2029 | fail_sb_buffer: |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2030 | btrfs_stop_workers(&fs_info->generic_worker); |
Chris Mason | 247e743 | 2008-07-17 12:53:51 -0400 | [diff] [blame] | 2031 | btrfs_stop_workers(&fs_info->fixup_workers); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2032 | btrfs_stop_workers(&fs_info->delalloc_workers); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 2033 | btrfs_stop_workers(&fs_info->workers); |
| 2034 | btrfs_stop_workers(&fs_info->endio_workers); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2035 | btrfs_stop_workers(&fs_info->endio_meta_workers); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 2036 | btrfs_stop_workers(&fs_info->endio_meta_write_workers); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 2037 | btrfs_stop_workers(&fs_info->endio_write_workers); |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 2038 | btrfs_stop_workers(&fs_info->submit_workers); |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 2039 | fail_iput: |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2040 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 2041 | iput(fs_info->btree_inode); |
Qinghuang Feng | 7e66285 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2042 | |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2043 | btrfs_close_devices(fs_info->fs_devices); |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 2044 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 2045 | fail_bdi: |
Qinghuang Feng | 7e66285 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2046 | bdi_destroy(&fs_info->bdi); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2047 | fail_srcu: |
| 2048 | cleanup_srcu_struct(&fs_info->subvol_srcu); |
Qinghuang Feng | 7e66285 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2049 | fail: |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2050 | kfree(extent_root); |
| 2051 | kfree(tree_root); |
| 2052 | kfree(fs_info); |
Jim Meyering | 83afeac | 2008-10-01 19:09:51 -0400 | [diff] [blame] | 2053 | kfree(chunk_root); |
| 2054 | kfree(dev_root); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2055 | kfree(csum_root); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2056 | return ERR_PTR(err); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 2057 | } |
| 2058 | |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2059 | static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) |
| 2060 | { |
| 2061 | char b[BDEVNAME_SIZE]; |
| 2062 | |
| 2063 | if (uptodate) { |
| 2064 | set_buffer_uptodate(bh); |
| 2065 | } else { |
Christoph Hellwig | c3b9a62 | 2010-08-18 05:29:12 -0400 | [diff] [blame] | 2066 | if (printk_ratelimit()) { |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2067 | printk(KERN_WARNING "lost page write due to " |
| 2068 | "I/O error on %s\n", |
| 2069 | bdevname(bh->b_bdev, b)); |
| 2070 | } |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 2071 | /* note, we dont' set_buffer_write_io_error because we have |
| 2072 | * our own ways of dealing with the IO errors |
| 2073 | */ |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2074 | clear_buffer_uptodate(bh); |
| 2075 | } |
| 2076 | unlock_buffer(bh); |
| 2077 | put_bh(bh); |
| 2078 | } |
| 2079 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2080 | struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) |
| 2081 | { |
| 2082 | struct buffer_head *bh; |
| 2083 | struct buffer_head *latest = NULL; |
| 2084 | struct btrfs_super_block *super; |
| 2085 | int i; |
| 2086 | u64 transid = 0; |
| 2087 | u64 bytenr; |
| 2088 | |
| 2089 | /* we would like to check all the supers, but that would make |
| 2090 | * a btrfs mount succeed after a mkfs from a different FS. |
| 2091 | * So, we need to add a special mount option to scan for |
| 2092 | * later supers, using BTRFS_SUPER_MIRROR_MAX instead |
| 2093 | */ |
| 2094 | for (i = 0; i < 1; i++) { |
| 2095 | bytenr = btrfs_sb_offset(i); |
| 2096 | if (bytenr + 4096 >= i_size_read(bdev->bd_inode)) |
| 2097 | break; |
| 2098 | bh = __bread(bdev, bytenr / 4096, 4096); |
| 2099 | if (!bh) |
| 2100 | continue; |
| 2101 | |
| 2102 | super = (struct btrfs_super_block *)bh->b_data; |
| 2103 | if (btrfs_super_bytenr(super) != bytenr || |
| 2104 | strncmp((char *)(&super->magic), BTRFS_MAGIC, |
| 2105 | sizeof(super->magic))) { |
| 2106 | brelse(bh); |
| 2107 | continue; |
| 2108 | } |
| 2109 | |
| 2110 | if (!latest || btrfs_super_generation(super) > transid) { |
| 2111 | brelse(latest); |
| 2112 | latest = bh; |
| 2113 | transid = btrfs_super_generation(super); |
| 2114 | } else { |
| 2115 | brelse(bh); |
| 2116 | } |
| 2117 | } |
| 2118 | return latest; |
| 2119 | } |
| 2120 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2121 | /* |
| 2122 | * this should be called twice, once with wait == 0 and |
| 2123 | * once with wait == 1. When wait == 0 is done, all the buffer heads |
| 2124 | * we write are pinned. |
| 2125 | * |
| 2126 | * They are released when wait == 1 is done. |
| 2127 | * max_mirrors must be the same for both runs, and it indicates how |
| 2128 | * many supers on this one device should be written. |
| 2129 | * |
| 2130 | * max_mirrors == 0 means to write them all. |
| 2131 | */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2132 | static int write_dev_supers(struct btrfs_device *device, |
| 2133 | struct btrfs_super_block *sb, |
| 2134 | int do_barriers, int wait, int max_mirrors) |
| 2135 | { |
| 2136 | struct buffer_head *bh; |
| 2137 | int i; |
| 2138 | int ret; |
| 2139 | int errors = 0; |
| 2140 | u32 crc; |
| 2141 | u64 bytenr; |
| 2142 | int last_barrier = 0; |
| 2143 | |
| 2144 | if (max_mirrors == 0) |
| 2145 | max_mirrors = BTRFS_SUPER_MIRROR_MAX; |
| 2146 | |
| 2147 | /* make sure only the last submit_bh does a barrier */ |
| 2148 | if (do_barriers) { |
| 2149 | for (i = 0; i < max_mirrors; i++) { |
| 2150 | bytenr = btrfs_sb_offset(i); |
| 2151 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= |
| 2152 | device->total_bytes) |
| 2153 | break; |
| 2154 | last_barrier = i; |
| 2155 | } |
| 2156 | } |
| 2157 | |
| 2158 | for (i = 0; i < max_mirrors; i++) { |
| 2159 | bytenr = btrfs_sb_offset(i); |
| 2160 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes) |
| 2161 | break; |
| 2162 | |
| 2163 | if (wait) { |
| 2164 | bh = __find_get_block(device->bdev, bytenr / 4096, |
| 2165 | BTRFS_SUPER_INFO_SIZE); |
| 2166 | BUG_ON(!bh); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2167 | wait_on_buffer(bh); |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2168 | if (!buffer_uptodate(bh)) |
| 2169 | errors++; |
| 2170 | |
| 2171 | /* drop our reference */ |
| 2172 | brelse(bh); |
| 2173 | |
| 2174 | /* drop the reference from the wait == 0 run */ |
| 2175 | brelse(bh); |
| 2176 | continue; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2177 | } else { |
| 2178 | btrfs_set_super_bytenr(sb, bytenr); |
| 2179 | |
| 2180 | crc = ~(u32)0; |
| 2181 | crc = btrfs_csum_data(NULL, (char *)sb + |
| 2182 | BTRFS_CSUM_SIZE, crc, |
| 2183 | BTRFS_SUPER_INFO_SIZE - |
| 2184 | BTRFS_CSUM_SIZE); |
| 2185 | btrfs_csum_final(crc, sb->csum); |
| 2186 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2187 | /* |
| 2188 | * one reference for us, and we leave it for the |
| 2189 | * caller |
| 2190 | */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2191 | bh = __getblk(device->bdev, bytenr / 4096, |
| 2192 | BTRFS_SUPER_INFO_SIZE); |
| 2193 | memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); |
| 2194 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2195 | /* one reference for submit_bh */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2196 | get_bh(bh); |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2197 | |
| 2198 | set_buffer_uptodate(bh); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2199 | lock_buffer(bh); |
| 2200 | bh->b_end_io = btrfs_end_buffer_write_sync; |
| 2201 | } |
| 2202 | |
Christoph Hellwig | c3b9a62 | 2010-08-18 05:29:12 -0400 | [diff] [blame] | 2203 | if (i == last_barrier && do_barriers) |
| 2204 | ret = submit_bh(WRITE_FLUSH_FUA, bh); |
| 2205 | else |
Chris Mason | ffbd517 | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 2206 | ret = submit_bh(WRITE_SYNC, bh); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2207 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2208 | if (ret) |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2209 | errors++; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2210 | } |
| 2211 | return errors < i ? 0 : -1; |
| 2212 | } |
| 2213 | |
| 2214 | int write_all_supers(struct btrfs_root *root, int max_mirrors) |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2215 | { |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 2216 | struct list_head *head; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2217 | struct btrfs_device *dev; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2218 | struct btrfs_super_block *sb; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2219 | struct btrfs_dev_item *dev_item; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2220 | int ret; |
| 2221 | int do_barriers; |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2222 | int max_errors; |
| 2223 | int total_errors = 0; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2224 | u64 flags; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2225 | |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2226 | max_errors = btrfs_super_num_devices(&root->fs_info->super_copy) - 1; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2227 | do_barriers = !btrfs_test_opt(root, NOBARRIER); |
| 2228 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2229 | sb = &root->fs_info->super_for_commit; |
| 2230 | dev_item = &sb->dev_item; |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 2231 | |
| 2232 | mutex_lock(&root->fs_info->fs_devices->device_list_mutex); |
| 2233 | head = &root->fs_info->fs_devices->devices; |
Qinghuang Feng | c6e3087 | 2009-01-21 10:59:08 -0500 | [diff] [blame] | 2234 | list_for_each_entry(dev, head, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2235 | if (!dev->bdev) { |
| 2236 | total_errors++; |
| 2237 | continue; |
| 2238 | } |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2239 | if (!dev->in_fs_metadata || !dev->writeable) |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2240 | continue; |
| 2241 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2242 | btrfs_set_stack_device_generation(dev_item, 0); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2243 | btrfs_set_stack_device_type(dev_item, dev->type); |
| 2244 | btrfs_set_stack_device_id(dev_item, dev->devid); |
| 2245 | btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes); |
| 2246 | btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used); |
| 2247 | btrfs_set_stack_device_io_align(dev_item, dev->io_align); |
| 2248 | btrfs_set_stack_device_io_width(dev_item, dev->io_width); |
| 2249 | btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); |
| 2250 | memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2251 | memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2252 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2253 | flags = btrfs_super_flags(sb); |
| 2254 | btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2255 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2256 | ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2257 | if (ret) |
| 2258 | total_errors++; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2259 | } |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2260 | if (total_errors > max_errors) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2261 | printk(KERN_ERR "btrfs: %d errors while writing supers\n", |
| 2262 | total_errors); |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2263 | BUG(); |
| 2264 | } |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2265 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2266 | total_errors = 0; |
Qinghuang Feng | c6e3087 | 2009-01-21 10:59:08 -0500 | [diff] [blame] | 2267 | list_for_each_entry(dev, head, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2268 | if (!dev->bdev) |
| 2269 | continue; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2270 | if (!dev->in_fs_metadata || !dev->writeable) |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2271 | continue; |
| 2272 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2273 | ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); |
| 2274 | if (ret) |
| 2275 | total_errors++; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2276 | } |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 2277 | mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2278 | if (total_errors > max_errors) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2279 | printk(KERN_ERR "btrfs: %d errors while writing supers\n", |
| 2280 | total_errors); |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2281 | BUG(); |
| 2282 | } |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2283 | return 0; |
| 2284 | } |
| 2285 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2286 | int write_ctree_super(struct btrfs_trans_handle *trans, |
| 2287 | struct btrfs_root *root, int max_mirrors) |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 2288 | { |
Chris Mason | e66f709 | 2007-04-20 13:16:02 -0400 | [diff] [blame] | 2289 | int ret; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 2290 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2291 | ret = write_all_supers(root, max_mirrors); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2292 | return ret; |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 2293 | } |
| 2294 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 2295 | int 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] | 2296 | { |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2297 | spin_lock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 2298 | radix_tree_delete(&fs_info->fs_roots_radix, |
| 2299 | (unsigned long)root->root_key.objectid); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2300 | spin_unlock(&fs_info->fs_roots_radix_lock); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2301 | |
| 2302 | if (btrfs_root_refs(&root->root_item) == 0) |
| 2303 | synchronize_srcu(&fs_info->subvol_srcu); |
| 2304 | |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2305 | free_fs_root(root); |
| 2306 | return 0; |
| 2307 | } |
| 2308 | |
| 2309 | static void free_fs_root(struct btrfs_root *root) |
| 2310 | { |
| 2311 | WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 2312 | if (root->anon_super.s_dev) { |
| 2313 | down_write(&root->anon_super.s_umount); |
| 2314 | kill_anon_super(&root->anon_super); |
| 2315 | } |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2316 | free_extent_buffer(root->node); |
| 2317 | free_extent_buffer(root->commit_root); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2318 | kfree(root->name); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 2319 | kfree(root); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 2320 | } |
| 2321 | |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 2322 | static int del_fs_roots(struct btrfs_fs_info *fs_info) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2323 | { |
| 2324 | int ret; |
| 2325 | struct btrfs_root *gang[8]; |
| 2326 | int i; |
| 2327 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2328 | while (!list_empty(&fs_info->dead_roots)) { |
| 2329 | gang[0] = list_entry(fs_info->dead_roots.next, |
| 2330 | struct btrfs_root, root_list); |
| 2331 | list_del(&gang[0]->root_list); |
| 2332 | |
| 2333 | if (gang[0]->in_radix) { |
| 2334 | btrfs_free_fs_root(fs_info, gang[0]); |
| 2335 | } else { |
| 2336 | free_extent_buffer(gang[0]->node); |
| 2337 | free_extent_buffer(gang[0]->commit_root); |
| 2338 | kfree(gang[0]); |
| 2339 | } |
| 2340 | } |
| 2341 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2342 | while (1) { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2343 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
| 2344 | (void **)gang, 0, |
| 2345 | ARRAY_SIZE(gang)); |
| 2346 | if (!ret) |
| 2347 | break; |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 2348 | for (i = 0; i < ret; i++) |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 2349 | btrfs_free_fs_root(fs_info, gang[i]); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2350 | } |
| 2351 | return 0; |
| 2352 | } |
Chris Mason | b4100d6 | 2007-04-12 12:14:00 -0400 | [diff] [blame] | 2353 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2354 | int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) |
| 2355 | { |
| 2356 | u64 root_objectid = 0; |
| 2357 | struct btrfs_root *gang[8]; |
| 2358 | int i; |
| 2359 | int ret; |
| 2360 | |
| 2361 | while (1) { |
| 2362 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
| 2363 | (void **)gang, root_objectid, |
| 2364 | ARRAY_SIZE(gang)); |
| 2365 | if (!ret) |
| 2366 | break; |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2367 | |
| 2368 | root_objectid = gang[ret - 1]->root_key.objectid + 1; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2369 | for (i = 0; i < ret; i++) { |
| 2370 | root_objectid = gang[i]->root_key.objectid; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2371 | btrfs_orphan_cleanup(gang[i]); |
| 2372 | } |
| 2373 | root_objectid++; |
| 2374 | } |
| 2375 | return 0; |
| 2376 | } |
| 2377 | |
| 2378 | int btrfs_commit_super(struct btrfs_root *root) |
| 2379 | { |
| 2380 | struct btrfs_trans_handle *trans; |
| 2381 | int ret; |
| 2382 | |
| 2383 | mutex_lock(&root->fs_info->cleaner_mutex); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 2384 | btrfs_run_delayed_iputs(root); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2385 | btrfs_clean_old_snapshots(root); |
| 2386 | mutex_unlock(&root->fs_info->cleaner_mutex); |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 2387 | |
| 2388 | /* wait until ongoing cleanup work done */ |
| 2389 | down_write(&root->fs_info->cleanup_work_sem); |
| 2390 | up_write(&root->fs_info->cleanup_work_sem); |
| 2391 | |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 2392 | trans = btrfs_join_transaction(root, 1); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2393 | ret = btrfs_commit_transaction(trans, root); |
| 2394 | BUG_ON(ret); |
| 2395 | /* run commit again to drop the original snapshot */ |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 2396 | trans = btrfs_join_transaction(root, 1); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2397 | btrfs_commit_transaction(trans, root); |
| 2398 | ret = btrfs_write_and_wait_transaction(NULL, root); |
| 2399 | BUG_ON(ret); |
| 2400 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2401 | ret = write_ctree_super(NULL, root, 0); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2402 | return ret; |
| 2403 | } |
| 2404 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 2405 | int close_ctree(struct btrfs_root *root) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 2406 | { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2407 | struct btrfs_fs_info *fs_info = root->fs_info; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2408 | int ret; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 2409 | |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 2410 | fs_info->closing = 1; |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2411 | smp_mb(); |
| 2412 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2413 | if (!(fs_info->sb->s_flags & MS_RDONLY)) { |
| 2414 | ret = btrfs_commit_super(root); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2415 | if (ret) |
| 2416 | printk(KERN_ERR "btrfs: commit super ret %d\n", ret); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2417 | } |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 2418 | |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2419 | kthread_stop(root->fs_info->transaction_kthread); |
| 2420 | kthread_stop(root->fs_info->cleaner_kthread); |
| 2421 | |
Yan Zheng | f25784b | 2009-07-28 08:41:57 -0400 | [diff] [blame] | 2422 | fs_info->closing = 2; |
| 2423 | smp_mb(); |
| 2424 | |
Chris Mason | b0c68f8 | 2008-01-31 11:05:37 -0500 | [diff] [blame] | 2425 | if (fs_info->delalloc_bytes) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2426 | printk(KERN_INFO "btrfs: at unmount delalloc count %llu\n", |
Joel Becker | 2138093 | 2009-04-21 12:38:29 -0700 | [diff] [blame] | 2427 | (unsigned long long)fs_info->delalloc_bytes); |
Chris Mason | b0c68f8 | 2008-01-31 11:05:37 -0500 | [diff] [blame] | 2428 | } |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 2429 | if (fs_info->total_ref_cache_size) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2430 | printk(KERN_INFO "btrfs: at umount reference cache size %llu\n", |
| 2431 | (unsigned long long)fs_info->total_ref_cache_size); |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 2432 | } |
Yan | bcc63ab | 2008-07-30 16:29:20 -0400 | [diff] [blame] | 2433 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2434 | free_extent_buffer(fs_info->extent_root->node); |
| 2435 | free_extent_buffer(fs_info->extent_root->commit_root); |
| 2436 | free_extent_buffer(fs_info->tree_root->node); |
| 2437 | free_extent_buffer(fs_info->tree_root->commit_root); |
| 2438 | free_extent_buffer(root->fs_info->chunk_root->node); |
| 2439 | free_extent_buffer(root->fs_info->chunk_root->commit_root); |
| 2440 | free_extent_buffer(root->fs_info->dev_root->node); |
| 2441 | free_extent_buffer(root->fs_info->dev_root->commit_root); |
| 2442 | free_extent_buffer(root->fs_info->csum_root->node); |
| 2443 | free_extent_buffer(root->fs_info->csum_root->commit_root); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2444 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 2445 | btrfs_free_block_groups(root->fs_info); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2446 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2447 | del_fs_roots(fs_info); |
Chris Mason | d10c5f3 | 2007-12-17 20:14:04 -0500 | [diff] [blame] | 2448 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2449 | iput(fs_info->btree_inode); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 2450 | |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2451 | btrfs_stop_workers(&fs_info->generic_worker); |
Chris Mason | 247e743 | 2008-07-17 12:53:51 -0400 | [diff] [blame] | 2452 | btrfs_stop_workers(&fs_info->fixup_workers); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2453 | btrfs_stop_workers(&fs_info->delalloc_workers); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 2454 | btrfs_stop_workers(&fs_info->workers); |
| 2455 | btrfs_stop_workers(&fs_info->endio_workers); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2456 | btrfs_stop_workers(&fs_info->endio_meta_workers); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 2457 | btrfs_stop_workers(&fs_info->endio_meta_write_workers); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 2458 | btrfs_stop_workers(&fs_info->endio_write_workers); |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 2459 | btrfs_stop_workers(&fs_info->submit_workers); |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 2460 | |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2461 | btrfs_close_devices(fs_info->fs_devices); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2462 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
Chris Mason | b248a41 | 2008-04-14 09:48:18 -0400 | [diff] [blame] | 2463 | |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 2464 | bdi_destroy(&fs_info->bdi); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2465 | cleanup_srcu_struct(&fs_info->subvol_srcu); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2466 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2467 | kfree(fs_info->extent_root); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2468 | kfree(fs_info->tree_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2469 | kfree(fs_info->chunk_root); |
| 2470 | kfree(fs_info->dev_root); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2471 | kfree(fs_info->csum_root); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 2472 | return 0; |
| 2473 | } |
| 2474 | |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 2475 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid) |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 2476 | { |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 2477 | int ret; |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 2478 | struct inode *btree_inode = buf->first_page->mapping->host; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 2479 | |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 2480 | ret = extent_buffer_uptodate(&BTRFS_I(btree_inode)->io_tree, buf, |
| 2481 | NULL); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 2482 | if (!ret) |
| 2483 | return ret; |
| 2484 | |
| 2485 | ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, |
| 2486 | parent_transid); |
| 2487 | return !ret; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2488 | } |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 2489 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2490 | int btrfs_set_buffer_uptodate(struct extent_buffer *buf) |
| 2491 | { |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 2492 | struct inode *btree_inode = buf->first_page->mapping->host; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 2493 | return set_extent_buffer_uptodate(&BTRFS_I(btree_inode)->io_tree, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2494 | buf); |
| 2495 | } |
| 2496 | |
| 2497 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf) |
| 2498 | { |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 2499 | struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2500 | u64 transid = btrfs_header_generation(buf); |
| 2501 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 2502 | int was_dirty; |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 2503 | |
Chris Mason | b9447ef | 2009-03-09 11:45:38 -0400 | [diff] [blame] | 2504 | btrfs_assert_tree_locked(buf); |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 2505 | if (transid != root->fs_info->generation) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2506 | printk(KERN_CRIT "btrfs transid mismatch buffer %llu, " |
| 2507 | "found %llu running %llu\n", |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2508 | (unsigned long long)buf->start, |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2509 | (unsigned long long)transid, |
| 2510 | (unsigned long long)root->fs_info->generation); |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 2511 | WARN_ON(1); |
| 2512 | } |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 2513 | was_dirty = set_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, |
| 2514 | buf); |
| 2515 | if (!was_dirty) { |
| 2516 | spin_lock(&root->fs_info->delalloc_lock); |
| 2517 | root->fs_info->dirty_metadata_bytes += buf->len; |
| 2518 | spin_unlock(&root->fs_info->delalloc_lock); |
| 2519 | } |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 2520 | } |
| 2521 | |
Chris Mason | d3c2fdc | 2007-09-17 10:58:06 -0400 | [diff] [blame] | 2522 | void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 2523 | { |
Chris Mason | 188de64 | 2008-05-09 11:52:25 -0400 | [diff] [blame] | 2524 | /* |
| 2525 | * looks as though older kernels can get into trouble with |
| 2526 | * this code, they end up stuck in balance_dirty_pages forever |
| 2527 | */ |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 2528 | u64 num_dirty; |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2529 | unsigned long thresh = 32 * 1024 * 1024; |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 2530 | |
Jens Axboe | 6933c02 | 2009-03-17 09:36:37 +0100 | [diff] [blame] | 2531 | if (current->flags & PF_MEMALLOC) |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 2532 | return; |
| 2533 | |
Chris Mason | 585ad2c | 2009-05-18 10:41:58 -0400 | [diff] [blame] | 2534 | num_dirty = root->fs_info->dirty_metadata_bytes; |
| 2535 | |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 2536 | if (num_dirty > thresh) { |
| 2537 | balance_dirty_pages_ratelimited_nr( |
Chris Mason | d7fc640 | 2008-02-18 12:12:38 -0500 | [diff] [blame] | 2538 | root->fs_info->btree_inode->i_mapping, 1); |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 2539 | } |
Chris Mason | 188de64 | 2008-05-09 11:52:25 -0400 | [diff] [blame] | 2540 | return; |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 2541 | } |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 2542 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 2543 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 2544 | { |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 2545 | struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 2546 | int ret; |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 2547 | ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2548 | if (ret == 0) |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 2549 | set_bit(EXTENT_BUFFER_UPTODATE, &buf->bflags); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 2550 | return ret; |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 2551 | } |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 2552 | |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 2553 | int btree_lock_page_hook(struct page *page) |
| 2554 | { |
| 2555 | struct inode *inode = page->mapping->host; |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 2556 | struct btrfs_root *root = BTRFS_I(inode)->root; |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 2557 | struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; |
| 2558 | struct extent_buffer *eb; |
| 2559 | unsigned long len; |
| 2560 | u64 bytenr = page_offset(page); |
| 2561 | |
| 2562 | if (page->private == EXTENT_PAGE_PRIVATE) |
| 2563 | goto out; |
| 2564 | |
| 2565 | len = page->private >> 2; |
| 2566 | eb = find_extent_buffer(io_tree, bytenr, len, GFP_NOFS); |
| 2567 | if (!eb) |
| 2568 | goto out; |
| 2569 | |
| 2570 | btrfs_tree_lock(eb); |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 2571 | btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN); |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 2572 | |
| 2573 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)) { |
| 2574 | spin_lock(&root->fs_info->delalloc_lock); |
| 2575 | if (root->fs_info->dirty_metadata_bytes >= eb->len) |
| 2576 | root->fs_info->dirty_metadata_bytes -= eb->len; |
| 2577 | else |
| 2578 | WARN_ON(1); |
| 2579 | spin_unlock(&root->fs_info->delalloc_lock); |
| 2580 | } |
| 2581 | |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 2582 | btrfs_tree_unlock(eb); |
| 2583 | free_extent_buffer(eb); |
| 2584 | out: |
| 2585 | lock_page(page); |
| 2586 | return 0; |
| 2587 | } |
| 2588 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 2589 | static struct extent_io_ops btree_extent_io_ops = { |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 2590 | .write_cache_pages_lock_hook = btree_lock_page_hook, |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 2591 | .readpage_end_io_hook = btree_readpage_end_io_hook, |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2592 | .submit_bio_hook = btree_submit_bio_hook, |
Chris Mason | 239b14b | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 2593 | /* note we're sharing with inode.c for the merge bio hook */ |
| 2594 | .merge_bio_hook = btrfs_merge_bio_hook, |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 2595 | }; |