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 | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 19 | #include <linux/version.h> |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 20 | #include <linux/fs.h> |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 21 | #include <linux/blkdev.h> |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 22 | #include <linux/scatterlist.h> |
Chris Mason | 22b0ebd | 2007-03-30 08:47:31 -0400 | [diff] [blame] | 23 | #include <linux/swap.h> |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 24 | #include <linux/radix-tree.h> |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 25 | #include <linux/writeback.h> |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 26 | #include <linux/buffer_head.h> // for block_sync_page |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 27 | #include <linux/workqueue.h> |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 28 | #include <linux/kthread.h> |
| 29 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20) |
| 30 | # include <linux/freezer.h> |
| 31 | #else |
| 32 | # include <linux/sched.h> |
| 33 | #endif |
Miguel | a5eb62e | 2008-04-11 15:45:51 -0400 | [diff] [blame] | 34 | #include "crc32c.h" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 35 | #include "ctree.h" |
| 36 | #include "disk-io.h" |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 37 | #include "transaction.h" |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 38 | #include "btrfs_inode.h" |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 39 | #include "volumes.h" |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 40 | #include "print-tree.h" |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 41 | #include "async-thread.h" |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 42 | #include "locking.h" |
Chris Mason | 017e536 | 2008-07-28 15:32:51 -0400 | [diff] [blame] | 43 | #include "ref-cache.h" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 44 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 45 | #if 0 |
| 46 | static int check_tree_block(struct btrfs_root *root, struct extent_buffer *buf) |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 47 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 48 | if (extent_buffer_blocknr(buf) != btrfs_header_blocknr(buf)) { |
| 49 | printk(KERN_CRIT "buf blocknr(buf) is %llu, header is %llu\n", |
| 50 | (unsigned long long)extent_buffer_blocknr(buf), |
| 51 | (unsigned long long)btrfs_header_blocknr(buf)); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 52 | return 1; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 53 | } |
Chris Mason | 9a8dd15 | 2007-02-23 08:38:36 -0500 | [diff] [blame] | 54 | return 0; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 55 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 56 | #endif |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 57 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 58 | static struct extent_io_ops btree_extent_io_ops; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 59 | static void end_workqueue_fn(struct btrfs_work *work); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 60 | |
| 61 | struct end_io_wq { |
| 62 | struct bio *bio; |
| 63 | bio_end_io_t *end_io; |
| 64 | void *private; |
| 65 | struct btrfs_fs_info *info; |
| 66 | int error; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 67 | int metadata; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 68 | struct list_head list; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 69 | struct btrfs_work work; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 70 | }; |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 71 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 72 | struct async_submit_bio { |
| 73 | struct inode *inode; |
| 74 | struct bio *bio; |
| 75 | struct list_head list; |
| 76 | extent_submit_bio_hook_t *submit_bio_hook; |
| 77 | int rw; |
| 78 | int mirror_num; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 79 | struct btrfs_work work; |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 80 | }; |
| 81 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 82 | struct extent_map *btree_get_extent(struct inode *inode, struct page *page, |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 83 | size_t page_offset, u64 start, u64 len, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 84 | int create) |
| 85 | { |
| 86 | struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; |
| 87 | struct extent_map *em; |
| 88 | int ret; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 89 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 90 | spin_lock(&em_tree->lock); |
| 91 | em = lookup_extent_mapping(em_tree, start, len); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 92 | if (em) { |
| 93 | em->bdev = |
| 94 | BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; |
| 95 | spin_unlock(&em_tree->lock); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 96 | goto out; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 97 | } |
| 98 | spin_unlock(&em_tree->lock); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 99 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 100 | em = alloc_extent_map(GFP_NOFS); |
| 101 | if (!em) { |
| 102 | em = ERR_PTR(-ENOMEM); |
| 103 | goto out; |
| 104 | } |
| 105 | em->start = 0; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 106 | em->len = (u64)-1; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 107 | em->block_start = 0; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 108 | em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 109 | |
| 110 | spin_lock(&em_tree->lock); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 111 | ret = add_extent_mapping(em_tree, em); |
| 112 | if (ret == -EEXIST) { |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 113 | u64 failed_start = em->start; |
| 114 | u64 failed_len = em->len; |
| 115 | |
| 116 | printk("failed to insert %Lu %Lu -> %Lu into tree\n", |
| 117 | em->start, em->len, em->block_start); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 118 | free_extent_map(em); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 119 | em = lookup_extent_mapping(em_tree, start, len); |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 120 | if (em) { |
| 121 | printk("after failing, found %Lu %Lu %Lu\n", |
| 122 | em->start, em->len, em->block_start); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 123 | ret = 0; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 124 | } else { |
| 125 | em = lookup_extent_mapping(em_tree, failed_start, |
| 126 | failed_len); |
| 127 | if (em) { |
| 128 | printk("double failure lookup gives us " |
| 129 | "%Lu %Lu -> %Lu\n", em->start, |
| 130 | em->len, em->block_start); |
| 131 | free_extent_map(em); |
| 132 | } |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 133 | ret = -EIO; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 134 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 135 | } else if (ret) { |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 136 | free_extent_map(em); |
| 137 | em = NULL; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 138 | } |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 139 | spin_unlock(&em_tree->lock); |
| 140 | |
| 141 | if (ret) |
| 142 | em = ERR_PTR(ret); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 143 | out: |
| 144 | return em; |
| 145 | } |
| 146 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 147 | u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len) |
| 148 | { |
Miguel | a5eb62e | 2008-04-11 15:45:51 -0400 | [diff] [blame] | 149 | return btrfs_crc32c(seed, data, len); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 150 | } |
| 151 | |
| 152 | void btrfs_csum_final(u32 crc, char *result) |
| 153 | { |
| 154 | *(__le32 *)result = ~cpu_to_le32(crc); |
| 155 | } |
| 156 | |
| 157 | static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, |
| 158 | int verify) |
| 159 | { |
| 160 | char result[BTRFS_CRC32_SIZE]; |
| 161 | unsigned long len; |
| 162 | unsigned long cur_len; |
| 163 | unsigned long offset = BTRFS_CSUM_SIZE; |
| 164 | char *map_token = NULL; |
| 165 | char *kaddr; |
| 166 | unsigned long map_start; |
| 167 | unsigned long map_len; |
| 168 | int err; |
| 169 | u32 crc = ~(u32)0; |
| 170 | |
| 171 | len = buf->len - offset; |
| 172 | while(len > 0) { |
| 173 | err = map_private_extent_buffer(buf, offset, 32, |
| 174 | &map_token, &kaddr, |
| 175 | &map_start, &map_len, KM_USER0); |
| 176 | if (err) { |
| 177 | printk("failed to map extent buffer! %lu\n", |
| 178 | offset); |
| 179 | return 1; |
| 180 | } |
| 181 | cur_len = min(len, map_len - (offset - map_start)); |
| 182 | crc = btrfs_csum_data(root, kaddr + offset - map_start, |
| 183 | crc, cur_len); |
| 184 | len -= cur_len; |
| 185 | offset += cur_len; |
| 186 | unmap_extent_buffer(buf, map_token, KM_USER0); |
| 187 | } |
| 188 | btrfs_csum_final(crc, result); |
| 189 | |
| 190 | if (verify) { |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 191 | /* FIXME, this is not good */ |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 192 | if (memcmp_extent_buffer(buf, result, 0, BTRFS_CRC32_SIZE)) { |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 193 | u32 val; |
| 194 | u32 found = 0; |
| 195 | memcpy(&found, result, BTRFS_CRC32_SIZE); |
| 196 | |
| 197 | read_extent_buffer(buf, &val, 0, BTRFS_CRC32_SIZE); |
| 198 | printk("btrfs: %s checksum verify failed on %llu " |
Chris Mason | 2dd3e67 | 2008-08-04 08:20:15 -0400 | [diff] [blame] | 199 | "wanted %X found %X level %d\n", |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 200 | root->fs_info->sb->s_id, |
Chris Mason | 2dd3e67 | 2008-08-04 08:20:15 -0400 | [diff] [blame] | 201 | buf->start, val, found, btrfs_header_level(buf)); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 202 | return 1; |
| 203 | } |
| 204 | } else { |
| 205 | write_extent_buffer(buf, result, 0, BTRFS_CRC32_SIZE); |
| 206 | } |
| 207 | return 0; |
| 208 | } |
| 209 | |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 210 | static int verify_parent_transid(struct extent_io_tree *io_tree, |
| 211 | struct extent_buffer *eb, u64 parent_transid) |
| 212 | { |
| 213 | int ret; |
| 214 | |
| 215 | if (!parent_transid || btrfs_header_generation(eb) == parent_transid) |
| 216 | return 0; |
| 217 | |
| 218 | lock_extent(io_tree, eb->start, eb->start + eb->len - 1, GFP_NOFS); |
| 219 | if (extent_buffer_uptodate(io_tree, eb) && |
| 220 | btrfs_header_generation(eb) == parent_transid) { |
| 221 | ret = 0; |
| 222 | goto out; |
| 223 | } |
| 224 | printk("parent transid verify failed on %llu wanted %llu found %llu\n", |
| 225 | (unsigned long long)eb->start, |
| 226 | (unsigned long long)parent_transid, |
| 227 | (unsigned long long)btrfs_header_generation(eb)); |
| 228 | ret = 1; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 229 | clear_extent_buffer_uptodate(io_tree, eb); |
Chris Mason | 33958dc | 2008-07-30 10:29:12 -0400 | [diff] [blame] | 230 | out: |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 231 | unlock_extent(io_tree, eb->start, eb->start + eb->len - 1, |
| 232 | GFP_NOFS); |
| 233 | return ret; |
| 234 | |
| 235 | } |
| 236 | |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 237 | static int btree_read_extent_buffer_pages(struct btrfs_root *root, |
| 238 | struct extent_buffer *eb, |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 239 | u64 start, u64 parent_transid) |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 240 | { |
| 241 | struct extent_io_tree *io_tree; |
| 242 | int ret; |
| 243 | int num_copies = 0; |
| 244 | int mirror_num = 0; |
| 245 | |
| 246 | io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; |
| 247 | while (1) { |
| 248 | ret = read_extent_buffer_pages(io_tree, eb, start, 1, |
| 249 | btree_get_extent, mirror_num); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 250 | if (!ret && |
| 251 | !verify_parent_transid(io_tree, eb, parent_transid)) |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 252 | return ret; |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 253 | |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 254 | num_copies = btrfs_num_copies(&root->fs_info->mapping_tree, |
| 255 | eb->start, eb->len); |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 256 | if (num_copies == 1) |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 257 | return ret; |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 258 | |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 259 | mirror_num++; |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 260 | if (mirror_num > num_copies) |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 261 | return ret; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 262 | } |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 263 | return -EIO; |
| 264 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 265 | |
| 266 | int csum_dirty_buffer(struct btrfs_root *root, struct page *page) |
| 267 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 268 | struct extent_io_tree *tree; |
Chris Mason | 35ebb93 | 2007-10-30 16:56:53 -0400 | [diff] [blame] | 269 | u64 start = (u64)page->index << PAGE_CACHE_SHIFT; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 270 | u64 found_start; |
| 271 | int found_level; |
| 272 | unsigned long len; |
| 273 | struct extent_buffer *eb; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 274 | int ret; |
| 275 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 276 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 277 | |
| 278 | if (page->private == EXTENT_PAGE_PRIVATE) |
| 279 | goto out; |
| 280 | if (!page->private) |
| 281 | goto out; |
| 282 | len = page->private >> 2; |
| 283 | if (len == 0) { |
| 284 | WARN_ON(1); |
| 285 | } |
| 286 | eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS); |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 287 | ret = btree_read_extent_buffer_pages(root, eb, start + PAGE_CACHE_SIZE, |
| 288 | btrfs_header_generation(eb)); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 289 | BUG_ON(ret); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 290 | found_start = btrfs_header_bytenr(eb); |
| 291 | if (found_start != start) { |
| 292 | printk("warning: eb start incorrect %Lu buffer %Lu len %lu\n", |
| 293 | start, found_start, len); |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 294 | WARN_ON(1); |
| 295 | goto err; |
| 296 | } |
| 297 | if (eb->first_page != page) { |
| 298 | printk("bad first page %lu %lu\n", eb->first_page->index, |
| 299 | page->index); |
| 300 | WARN_ON(1); |
| 301 | goto err; |
| 302 | } |
| 303 | if (!PageUptodate(page)) { |
| 304 | printk("csum not up to date page %lu\n", page->index); |
| 305 | WARN_ON(1); |
| 306 | goto err; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 307 | } |
| 308 | found_level = btrfs_header_level(eb); |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 309 | spin_lock(&root->fs_info->hash_lock); |
| 310 | btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN); |
| 311 | spin_unlock(&root->fs_info->hash_lock); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 312 | csum_tree_block(root, eb, 0); |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 313 | err: |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 314 | free_extent_buffer(eb); |
| 315 | out: |
| 316 | return 0; |
| 317 | } |
| 318 | |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 319 | static int btree_writepage_io_hook(struct page *page, u64 start, u64 end) |
| 320 | { |
| 321 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
| 322 | |
| 323 | csum_dirty_buffer(root, page); |
| 324 | return 0; |
| 325 | } |
| 326 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 327 | int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end, |
| 328 | struct extent_state *state) |
| 329 | { |
| 330 | struct extent_io_tree *tree; |
| 331 | u64 found_start; |
| 332 | int found_level; |
| 333 | unsigned long len; |
| 334 | struct extent_buffer *eb; |
| 335 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 336 | int ret = 0; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 337 | |
| 338 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
| 339 | if (page->private == EXTENT_PAGE_PRIVATE) |
| 340 | goto out; |
| 341 | if (!page->private) |
| 342 | goto out; |
| 343 | len = page->private >> 2; |
| 344 | if (len == 0) { |
| 345 | WARN_ON(1); |
| 346 | } |
| 347 | eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 348 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 349 | found_start = btrfs_header_bytenr(eb); |
| 350 | if (found_start != start) { |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 351 | ret = -EIO; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 352 | goto err; |
| 353 | } |
| 354 | if (eb->first_page != page) { |
| 355 | printk("bad first page %lu %lu\n", eb->first_page->index, |
| 356 | page->index); |
| 357 | WARN_ON(1); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 358 | ret = -EIO; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 359 | goto err; |
| 360 | } |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 361 | if (memcmp_extent_buffer(eb, root->fs_info->fsid, |
| 362 | (unsigned long)btrfs_header_fsid(eb), |
| 363 | BTRFS_FSID_SIZE)) { |
| 364 | printk("bad fsid on block %Lu\n", eb->start); |
| 365 | ret = -EIO; |
| 366 | goto err; |
| 367 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 368 | found_level = btrfs_header_level(eb); |
| 369 | |
| 370 | ret = csum_tree_block(root, eb, 1); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 371 | if (ret) |
| 372 | ret = -EIO; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 373 | |
| 374 | end = min_t(u64, eb->len, PAGE_CACHE_SIZE); |
| 375 | end = eb->start + end - 1; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 376 | err: |
| 377 | free_extent_buffer(eb); |
| 378 | out: |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 379 | return ret; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,23) |
| 383 | static void end_workqueue_bio(struct bio *bio, int err) |
| 384 | #else |
| 385 | static int end_workqueue_bio(struct bio *bio, |
| 386 | unsigned int bytes_done, int err) |
| 387 | #endif |
| 388 | { |
| 389 | struct end_io_wq *end_io_wq = bio->bi_private; |
| 390 | struct btrfs_fs_info *fs_info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 391 | |
| 392 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,23) |
| 393 | if (bio->bi_size) |
| 394 | return 1; |
| 395 | #endif |
| 396 | |
| 397 | fs_info = end_io_wq->info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 398 | end_io_wq->error = err; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 399 | end_io_wq->work.func = end_workqueue_fn; |
| 400 | end_io_wq->work.flags = 0; |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 401 | if (bio->bi_rw & (1 << BIO_RW)) |
| 402 | btrfs_queue_worker(&fs_info->endio_write_workers, |
| 403 | &end_io_wq->work); |
| 404 | else |
| 405 | btrfs_queue_worker(&fs_info->endio_workers, &end_io_wq->work); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 406 | |
| 407 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,23) |
| 408 | return 0; |
| 409 | #endif |
| 410 | } |
| 411 | |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 412 | int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, |
| 413 | int metadata) |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 414 | { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 415 | struct end_io_wq *end_io_wq; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 416 | end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); |
| 417 | if (!end_io_wq) |
| 418 | return -ENOMEM; |
| 419 | |
| 420 | end_io_wq->private = bio->bi_private; |
| 421 | end_io_wq->end_io = bio->bi_end_io; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 422 | end_io_wq->info = info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 423 | end_io_wq->error = 0; |
| 424 | end_io_wq->bio = bio; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 425 | end_io_wq->metadata = metadata; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 426 | |
| 427 | bio->bi_private = end_io_wq; |
| 428 | bio->bi_end_io = end_workqueue_bio; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 429 | return 0; |
| 430 | } |
| 431 | |
Chris Mason | 777e6bd | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 432 | int btrfs_congested_async(struct btrfs_fs_info *info, int iodone) |
Chris Mason | 0986fe9e | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 433 | { |
| 434 | int limit = 256 * info->fs_devices->open_devices; |
| 435 | |
| 436 | if (iodone) |
| 437 | limit = (limit * 3) / 2; |
| 438 | if (atomic_read(&info->nr_async_submits) > limit) |
| 439 | return 1; |
| 440 | |
Chris Mason | 0986fe9e | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 441 | return atomic_read(&info->nr_async_bios) > limit; |
| 442 | } |
| 443 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 444 | static void run_one_async_submit(struct btrfs_work *work) |
| 445 | { |
| 446 | struct btrfs_fs_info *fs_info; |
| 447 | struct async_submit_bio *async; |
| 448 | |
| 449 | async = container_of(work, struct async_submit_bio, work); |
| 450 | fs_info = BTRFS_I(async->inode)->root->fs_info; |
| 451 | atomic_dec(&fs_info->nr_async_submits); |
Chris Mason | 0986fe9e | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 452 | |
| 453 | if ((async->bio->bi_rw & (1 << BIO_RW)) && |
Chris Mason | 777e6bd | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 454 | !btrfs_congested_async(fs_info, 1)) { |
Chris Mason | 0986fe9e | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 455 | clear_bdi_congested(&fs_info->bdi, WRITE); |
| 456 | } |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 457 | async->submit_bio_hook(async->inode, async->rw, async->bio, |
| 458 | async->mirror_num); |
| 459 | kfree(async); |
| 460 | } |
| 461 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 462 | int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, |
| 463 | int rw, struct bio *bio, int mirror_num, |
| 464 | extent_submit_bio_hook_t *submit_bio_hook) |
| 465 | { |
| 466 | struct async_submit_bio *async; |
| 467 | |
| 468 | async = kmalloc(sizeof(*async), GFP_NOFS); |
| 469 | if (!async) |
| 470 | return -ENOMEM; |
| 471 | |
| 472 | async->inode = inode; |
| 473 | async->rw = rw; |
| 474 | async->bio = bio; |
| 475 | async->mirror_num = mirror_num; |
| 476 | async->submit_bio_hook = submit_bio_hook; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 477 | async->work.func = run_one_async_submit; |
| 478 | async->work.flags = 0; |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 479 | atomic_inc(&fs_info->nr_async_submits); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 480 | btrfs_queue_worker(&fs_info->workers, &async->work); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 481 | return 0; |
| 482 | } |
| 483 | |
| 484 | static int __btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 485 | int mirror_num) |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 486 | { |
| 487 | struct btrfs_root *root = BTRFS_I(inode)->root; |
| 488 | u64 offset; |
| 489 | int ret; |
| 490 | |
| 491 | offset = bio->bi_sector << 9; |
| 492 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 493 | /* |
| 494 | * 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^] | 495 | * submission context. Just jump into btrfs_map_bio |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 496 | */ |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 497 | if (rw & (1 << BIO_RW)) { |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 498 | return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame^] | 499 | mirror_num, 1); |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 500 | } |
| 501 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 502 | /* |
| 503 | * called for a read, do the setup so that checksum validation |
| 504 | * can happen in the async kernel threads |
| 505 | */ |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 506 | ret = btrfs_bio_wq_end_io(root->fs_info, bio, 1); |
| 507 | BUG_ON(ret); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 508 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 509 | 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] | 510 | } |
| 511 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 512 | static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, |
| 513 | int mirror_num) |
| 514 | { |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 515 | /* |
| 516 | * kthread helpers are used to submit writes so that checksumming |
| 517 | * can happen in parallel across all CPUs |
| 518 | */ |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 519 | if (!(rw & (1 << BIO_RW))) { |
| 520 | return __btree_submit_bio_hook(inode, rw, bio, mirror_num); |
| 521 | } |
| 522 | return btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, |
| 523 | inode, rw, bio, mirror_num, |
| 524 | __btree_submit_bio_hook); |
| 525 | } |
| 526 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 527 | static int btree_writepage(struct page *page, struct writeback_control *wbc) |
| 528 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 529 | struct extent_io_tree *tree; |
| 530 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame^] | 531 | |
| 532 | if (current->flags & PF_MEMALLOC) { |
| 533 | redirty_page_for_writepage(wbc, page); |
| 534 | unlock_page(page); |
| 535 | return 0; |
| 536 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 537 | return extent_write_full_page(tree, page, btree_get_extent, wbc); |
| 538 | } |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 539 | |
| 540 | static int btree_writepages(struct address_space *mapping, |
| 541 | struct writeback_control *wbc) |
| 542 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 543 | struct extent_io_tree *tree; |
| 544 | tree = &BTRFS_I(mapping->host)->io_tree; |
Chris Mason | d8d5f3e | 2007-12-11 12:42:00 -0500 | [diff] [blame] | 545 | if (wbc->sync_mode == WB_SYNC_NONE) { |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 546 | u64 num_dirty; |
| 547 | u64 start = 0; |
| 548 | unsigned long thresh = 96 * 1024 * 1024; |
Chris Mason | 448d640 | 2007-11-27 07:52:01 -0800 | [diff] [blame] | 549 | |
| 550 | if (wbc->for_kupdate) |
| 551 | return 0; |
| 552 | |
Chris Mason | ca66462 | 2007-11-27 11:16:35 -0500 | [diff] [blame] | 553 | if (current_is_pdflush()) { |
| 554 | thresh = 96 * 1024 * 1024; |
| 555 | } else { |
| 556 | thresh = 8 * 1024 * 1024; |
| 557 | } |
Chris Mason | 1832a6d | 2007-12-21 16:27:21 -0500 | [diff] [blame] | 558 | num_dirty = count_range_bits(tree, &start, (u64)-1, |
| 559 | thresh, EXTENT_DIRTY); |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 560 | if (num_dirty < thresh) { |
| 561 | return 0; |
| 562 | } |
| 563 | } |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 564 | return extent_writepages(tree, mapping, btree_get_extent, wbc); |
| 565 | } |
| 566 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 567 | int btree_readpage(struct file *file, struct page *page) |
| 568 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 569 | struct extent_io_tree *tree; |
| 570 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 571 | return extent_read_full_page(tree, page, btree_get_extent); |
| 572 | } |
| 573 | |
Chris Mason | 70dec80 | 2008-01-29 09:59:12 -0500 | [diff] [blame] | 574 | static int btree_releasepage(struct page *page, gfp_t gfp_flags) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 575 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 576 | struct extent_io_tree *tree; |
| 577 | struct extent_map_tree *map; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 578 | int ret; |
| 579 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 580 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
| 581 | map = &BTRFS_I(page->mapping->host)->extent_tree; |
Chris Mason | 6af118ce | 2008-07-22 11:18:07 -0400 | [diff] [blame] | 582 | |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 583 | ret = try_release_extent_state(map, tree, page, gfp_flags); |
Chris Mason | 6af118ce | 2008-07-22 11:18:07 -0400 | [diff] [blame] | 584 | if (!ret) { |
| 585 | return 0; |
| 586 | } |
| 587 | |
| 588 | ret = try_release_extent_buffer(tree, page); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 589 | if (ret == 1) { |
| 590 | ClearPagePrivate(page); |
| 591 | set_page_private(page, 0); |
| 592 | page_cache_release(page); |
| 593 | } |
Chris Mason | 6af118ce | 2008-07-22 11:18:07 -0400 | [diff] [blame] | 594 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 595 | return ret; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 596 | } |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 597 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 598 | static void btree_invalidatepage(struct page *page, unsigned long offset) |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 599 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 600 | struct extent_io_tree *tree; |
| 601 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 602 | extent_invalidatepage(tree, page, offset); |
| 603 | btree_releasepage(page, GFP_NOFS); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 604 | if (PagePrivate(page)) { |
Chris Mason | 6af118ce | 2008-07-22 11:18:07 -0400 | [diff] [blame] | 605 | printk("warning page private not zero on page %Lu\n", |
| 606 | page_offset(page)); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 607 | ClearPagePrivate(page); |
| 608 | set_page_private(page, 0); |
| 609 | page_cache_release(page); |
| 610 | } |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 611 | } |
| 612 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 613 | #if 0 |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 614 | static int btree_writepage(struct page *page, struct writeback_control *wbc) |
| 615 | { |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 616 | struct buffer_head *bh; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 617 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 618 | struct buffer_head *head; |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 619 | if (!page_has_buffers(page)) { |
| 620 | create_empty_buffers(page, root->fs_info->sb->s_blocksize, |
| 621 | (1 << BH_Dirty)|(1 << BH_Uptodate)); |
| 622 | } |
| 623 | head = page_buffers(page); |
| 624 | bh = head; |
| 625 | do { |
| 626 | if (buffer_dirty(bh)) |
| 627 | csum_tree_block(root, bh, 0); |
| 628 | bh = bh->b_this_page; |
| 629 | } while (bh != head); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 630 | return block_write_full_page(page, btree_get_block, wbc); |
| 631 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 632 | #endif |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 633 | |
| 634 | static struct address_space_operations btree_aops = { |
| 635 | .readpage = btree_readpage, |
| 636 | .writepage = btree_writepage, |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 637 | .writepages = btree_writepages, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 638 | .releasepage = btree_releasepage, |
| 639 | .invalidatepage = btree_invalidatepage, |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 640 | .sync_page = block_sync_page, |
| 641 | }; |
| 642 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 643 | int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, |
| 644 | u64 parent_transid) |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 645 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 646 | struct extent_buffer *buf = NULL; |
| 647 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 648 | int ret = 0; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 649 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 650 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 651 | if (!buf) |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 652 | return 0; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 653 | read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 654 | buf, 0, 0, btree_get_extent, 0); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 655 | free_extent_buffer(buf); |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 656 | return ret; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 657 | } |
| 658 | |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 659 | struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, |
| 660 | u64 bytenr, u32 blocksize) |
| 661 | { |
| 662 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 663 | struct extent_buffer *eb; |
| 664 | eb = find_extent_buffer(&BTRFS_I(btree_inode)->io_tree, |
| 665 | bytenr, blocksize, GFP_NOFS); |
| 666 | return eb; |
| 667 | } |
| 668 | |
| 669 | struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, |
| 670 | u64 bytenr, u32 blocksize) |
| 671 | { |
| 672 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 673 | struct extent_buffer *eb; |
| 674 | |
| 675 | eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree, |
| 676 | bytenr, blocksize, NULL, GFP_NOFS); |
| 677 | return eb; |
| 678 | } |
| 679 | |
| 680 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 681 | struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 682 | u32 blocksize, u64 parent_transid) |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 683 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 684 | struct extent_buffer *buf = NULL; |
| 685 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 686 | struct extent_io_tree *io_tree; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 687 | int ret; |
| 688 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 689 | io_tree = &BTRFS_I(btree_inode)->io_tree; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 690 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 691 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 692 | if (!buf) |
| 693 | return NULL; |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 694 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 695 | ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 696 | |
| 697 | if (ret == 0) { |
| 698 | buf->flags |= EXTENT_UPTODATE; |
| 699 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 700 | return buf; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 701 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 702 | } |
| 703 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 704 | 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] | 705 | struct extent_buffer *buf) |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 706 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 707 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 708 | if (btrfs_header_generation(buf) == |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 709 | root->fs_info->running_transaction->transid) { |
| 710 | WARN_ON(!btrfs_tree_locked(buf)); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 711 | clear_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 712 | buf); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 713 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 714 | return 0; |
| 715 | } |
| 716 | |
| 717 | int wait_on_tree_block_writeback(struct btrfs_root *root, |
| 718 | struct extent_buffer *buf) |
| 719 | { |
| 720 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 721 | wait_on_extent_buffer_writeback(&BTRFS_I(btree_inode)->io_tree, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 722 | buf); |
| 723 | return 0; |
| 724 | } |
| 725 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 726 | static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 727 | u32 stripesize, struct btrfs_root *root, |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 728 | struct btrfs_fs_info *fs_info, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 729 | u64 objectid) |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 730 | { |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 731 | root->node = NULL; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 732 | root->inode = NULL; |
Chris Mason | a28ec19 | 2007-03-06 20:08:01 -0500 | [diff] [blame] | 733 | root->commit_root = NULL; |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 734 | root->ref_tree = NULL; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 735 | root->sectorsize = sectorsize; |
| 736 | root->nodesize = nodesize; |
| 737 | root->leafsize = leafsize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 738 | root->stripesize = stripesize; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 739 | root->ref_cows = 0; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 740 | root->track_dirty = 0; |
| 741 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 742 | root->fs_info = fs_info; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 743 | root->objectid = objectid; |
| 744 | root->last_trans = 0; |
Chris Mason | 1b05da2 | 2007-04-10 12:13:09 -0400 | [diff] [blame] | 745 | root->highest_inode = 0; |
| 746 | root->last_inode_alloc = 0; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 747 | root->name = NULL; |
Chris Mason | 4313b39 | 2008-01-03 09:08:48 -0500 | [diff] [blame] | 748 | root->in_sysfs = 0; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 749 | |
| 750 | INIT_LIST_HEAD(&root->dirty_list); |
Josef Bacik | 7b12876 | 2008-07-24 12:17:14 -0400 | [diff] [blame] | 751 | INIT_LIST_HEAD(&root->orphan_list); |
Yan | bcc63ab | 2008-07-30 16:29:20 -0400 | [diff] [blame] | 752 | INIT_LIST_HEAD(&root->dead_list); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 753 | spin_lock_init(&root->node_lock); |
Yan | bcc63ab | 2008-07-30 16:29:20 -0400 | [diff] [blame] | 754 | spin_lock_init(&root->list_lock); |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 755 | mutex_init(&root->objectid_mutex); |
Chris Mason | 017e536 | 2008-07-28 15:32:51 -0400 | [diff] [blame] | 756 | |
| 757 | btrfs_leaf_ref_tree_init(&root->ref_tree_struct); |
| 758 | root->ref_tree = &root->ref_tree_struct; |
| 759 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 760 | memset(&root->root_key, 0, sizeof(root->root_key)); |
| 761 | memset(&root->root_item, 0, sizeof(root->root_item)); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 762 | memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 763 | memset(&root->root_kobj, 0, sizeof(root->root_kobj)); |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 764 | root->defrag_trans_start = fs_info->generation; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 765 | init_completion(&root->kobj_unregister); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 766 | root->defrag_running = 0; |
| 767 | root->defrag_level = 0; |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 768 | root->root_key.objectid = objectid; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 769 | return 0; |
| 770 | } |
| 771 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 772 | static int find_and_setup_root(struct btrfs_root *tree_root, |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 773 | struct btrfs_fs_info *fs_info, |
| 774 | u64 objectid, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 775 | struct btrfs_root *root) |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 776 | { |
| 777 | int ret; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 778 | u32 blocksize; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 779 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 780 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 781 | tree_root->sectorsize, tree_root->stripesize, |
| 782 | root, fs_info, objectid); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 783 | ret = btrfs_find_last_root(tree_root, objectid, |
| 784 | &root->root_item, &root->root_key); |
| 785 | BUG_ON(ret); |
| 786 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 787 | blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); |
| 788 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 789 | blocksize, 0); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 790 | BUG_ON(!root->node); |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 791 | return 0; |
| 792 | } |
| 793 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 794 | struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_fs_info *fs_info, |
| 795 | struct btrfs_key *location) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 796 | { |
| 797 | struct btrfs_root *root; |
| 798 | struct btrfs_root *tree_root = fs_info->tree_root; |
| 799 | struct btrfs_path *path; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 800 | struct extent_buffer *l; |
Chris Mason | 1b05da2 | 2007-04-10 12:13:09 -0400 | [diff] [blame] | 801 | u64 highest_inode; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 802 | u32 blocksize; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 803 | int ret = 0; |
| 804 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 805 | root = kzalloc(sizeof(*root), GFP_NOFS); |
Chris Mason | 0cf6c62 | 2007-06-09 09:22:25 -0400 | [diff] [blame] | 806 | if (!root) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 807 | return ERR_PTR(-ENOMEM); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 808 | if (location->offset == (u64)-1) { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 809 | ret = find_and_setup_root(tree_root, fs_info, |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 810 | location->objectid, root); |
| 811 | if (ret) { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 812 | kfree(root); |
| 813 | return ERR_PTR(ret); |
| 814 | } |
| 815 | goto insert; |
| 816 | } |
| 817 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 818 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 819 | tree_root->sectorsize, tree_root->stripesize, |
| 820 | root, fs_info, location->objectid); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 821 | |
| 822 | path = btrfs_alloc_path(); |
| 823 | BUG_ON(!path); |
| 824 | ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); |
| 825 | if (ret != 0) { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 826 | if (ret > 0) |
| 827 | ret = -ENOENT; |
| 828 | goto out; |
| 829 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 830 | l = path->nodes[0]; |
| 831 | read_extent_buffer(l, &root->root_item, |
| 832 | btrfs_item_ptr_offset(l, path->slots[0]), |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 833 | sizeof(root->root_item)); |
Yan Zheng | 44b36eb | 2007-10-19 09:22:56 -0400 | [diff] [blame] | 834 | memcpy(&root->root_key, location, sizeof(*location)); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 835 | ret = 0; |
| 836 | out: |
| 837 | btrfs_release_path(root, path); |
| 838 | btrfs_free_path(path); |
| 839 | if (ret) { |
| 840 | kfree(root); |
| 841 | return ERR_PTR(ret); |
| 842 | } |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 843 | blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); |
| 844 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 845 | blocksize, 0); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 846 | BUG_ON(!root->node); |
| 847 | insert: |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 848 | root->ref_cows = 1; |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 849 | ret = btrfs_find_highest_inode(root, &highest_inode); |
| 850 | if (ret == 0) { |
| 851 | root->highest_inode = highest_inode; |
| 852 | root->last_inode_alloc = highest_inode; |
| 853 | } |
| 854 | return root; |
| 855 | } |
| 856 | |
Chris Mason | dc17ff8 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 857 | struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, |
| 858 | u64 root_objectid) |
| 859 | { |
| 860 | struct btrfs_root *root; |
| 861 | |
| 862 | if (root_objectid == BTRFS_ROOT_TREE_OBJECTID) |
| 863 | return fs_info->tree_root; |
| 864 | if (root_objectid == BTRFS_EXTENT_TREE_OBJECTID) |
| 865 | return fs_info->extent_root; |
| 866 | |
| 867 | root = radix_tree_lookup(&fs_info->fs_roots_radix, |
| 868 | (unsigned long)root_objectid); |
| 869 | return root; |
| 870 | } |
| 871 | |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 872 | struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, |
| 873 | struct btrfs_key *location) |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 874 | { |
| 875 | struct btrfs_root *root; |
| 876 | int ret; |
| 877 | |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 878 | if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) |
| 879 | return fs_info->tree_root; |
| 880 | if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) |
| 881 | return fs_info->extent_root; |
Chris Mason | 8f18cf1 | 2008-04-25 16:53:30 -0400 | [diff] [blame] | 882 | if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) |
| 883 | return fs_info->chunk_root; |
| 884 | if (location->objectid == BTRFS_DEV_TREE_OBJECTID) |
| 885 | return fs_info->dev_root; |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 886 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 887 | root = radix_tree_lookup(&fs_info->fs_roots_radix, |
| 888 | (unsigned long)location->objectid); |
| 889 | if (root) |
| 890 | return root; |
| 891 | |
| 892 | root = btrfs_read_fs_root_no_radix(fs_info, location); |
| 893 | if (IS_ERR(root)) |
| 894 | return root; |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 895 | ret = radix_tree_insert(&fs_info->fs_roots_radix, |
| 896 | (unsigned long)root->root_key.objectid, |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 897 | root); |
| 898 | if (ret) { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 899 | free_extent_buffer(root->node); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 900 | kfree(root); |
| 901 | return ERR_PTR(ret); |
| 902 | } |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 903 | ret = btrfs_find_dead_roots(fs_info->tree_root, |
| 904 | root->root_key.objectid, root); |
| 905 | BUG_ON(ret); |
| 906 | |
| 907 | return root; |
| 908 | } |
| 909 | |
| 910 | struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info, |
| 911 | struct btrfs_key *location, |
| 912 | const char *name, int namelen) |
| 913 | { |
| 914 | struct btrfs_root *root; |
| 915 | int ret; |
| 916 | |
| 917 | root = btrfs_read_fs_root_no_name(fs_info, location); |
| 918 | if (!root) |
| 919 | return NULL; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 920 | |
Chris Mason | 4313b39 | 2008-01-03 09:08:48 -0500 | [diff] [blame] | 921 | if (root->in_sysfs) |
| 922 | return root; |
| 923 | |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 924 | ret = btrfs_set_root_name(root, name, namelen); |
| 925 | if (ret) { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 926 | free_extent_buffer(root->node); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 927 | kfree(root); |
| 928 | return ERR_PTR(ret); |
| 929 | } |
| 930 | |
| 931 | ret = btrfs_sysfs_add_root(root); |
| 932 | if (ret) { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 933 | free_extent_buffer(root->node); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 934 | kfree(root->name); |
| 935 | kfree(root); |
| 936 | return ERR_PTR(ret); |
| 937 | } |
Chris Mason | 4313b39 | 2008-01-03 09:08:48 -0500 | [diff] [blame] | 938 | root->in_sysfs = 1; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 939 | return root; |
| 940 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 941 | #if 0 |
| 942 | static int add_hasher(struct btrfs_fs_info *info, char *type) { |
| 943 | struct btrfs_hasher *hasher; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 944 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 945 | hasher = kmalloc(sizeof(*hasher), GFP_NOFS); |
| 946 | if (!hasher) |
| 947 | return -ENOMEM; |
| 948 | hasher->hash_tfm = crypto_alloc_hash(type, 0, CRYPTO_ALG_ASYNC); |
| 949 | if (!hasher->hash_tfm) { |
| 950 | kfree(hasher); |
| 951 | return -EINVAL; |
| 952 | } |
| 953 | spin_lock(&info->hash_lock); |
| 954 | list_add(&hasher->list, &info->hashers); |
| 955 | spin_unlock(&info->hash_lock); |
| 956 | return 0; |
| 957 | } |
| 958 | #endif |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 959 | |
| 960 | static int btrfs_congested_fn(void *congested_data, int bdi_bits) |
| 961 | { |
| 962 | struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; |
| 963 | int ret = 0; |
| 964 | struct list_head *cur; |
| 965 | struct btrfs_device *device; |
| 966 | struct backing_dev_info *bdi; |
| 967 | |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 968 | if ((bdi_bits & (1 << BDI_write_congested)) && |
Chris Mason | 777e6bd | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 969 | btrfs_congested_async(info, 0)) |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 970 | return 1; |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 971 | |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 972 | list_for_each(cur, &info->fs_devices->devices) { |
| 973 | device = list_entry(cur, struct btrfs_device, dev_list); |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 974 | if (!device->bdev) |
| 975 | continue; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 976 | bdi = blk_get_backing_dev_info(device->bdev); |
| 977 | if (bdi && bdi_congested(bdi, bdi_bits)) { |
| 978 | ret = 1; |
| 979 | break; |
| 980 | } |
| 981 | } |
| 982 | return ret; |
| 983 | } |
| 984 | |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 985 | /* |
| 986 | * this unplugs every device on the box, and it is only used when page |
| 987 | * is null |
| 988 | */ |
| 989 | static void __unplug_io_fn(struct backing_dev_info *bdi, struct page *page) |
| 990 | { |
| 991 | struct list_head *cur; |
| 992 | struct btrfs_device *device; |
| 993 | struct btrfs_fs_info *info; |
| 994 | |
| 995 | info = (struct btrfs_fs_info *)bdi->unplug_io_data; |
| 996 | list_for_each(cur, &info->fs_devices->devices) { |
| 997 | device = list_entry(cur, struct btrfs_device, dev_list); |
| 998 | bdi = blk_get_backing_dev_info(device->bdev); |
| 999 | if (bdi->unplug_io_fn) { |
| 1000 | bdi->unplug_io_fn(bdi, page); |
| 1001 | } |
| 1002 | } |
| 1003 | } |
| 1004 | |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1005 | void btrfs_unplug_io_fn(struct backing_dev_info *bdi, struct page *page) |
| 1006 | { |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1007 | struct inode *inode; |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1008 | struct extent_map_tree *em_tree; |
| 1009 | struct extent_map *em; |
Chris Mason | bcbfce8 | 2008-04-22 13:26:47 -0400 | [diff] [blame] | 1010 | struct address_space *mapping; |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1011 | u64 offset; |
| 1012 | |
Chris Mason | bcbfce8 | 2008-04-22 13:26:47 -0400 | [diff] [blame] | 1013 | /* the generic O_DIRECT read code does this */ |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1014 | if (!page) { |
| 1015 | __unplug_io_fn(bdi, page); |
| 1016 | return; |
| 1017 | } |
| 1018 | |
Chris Mason | bcbfce8 | 2008-04-22 13:26:47 -0400 | [diff] [blame] | 1019 | /* |
| 1020 | * page->mapping may change at any time. Get a consistent copy |
| 1021 | * and use that for everything below |
| 1022 | */ |
| 1023 | smp_mb(); |
| 1024 | mapping = page->mapping; |
| 1025 | if (!mapping) |
| 1026 | return; |
| 1027 | |
| 1028 | inode = mapping->host; |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1029 | offset = page_offset(page); |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1030 | |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1031 | em_tree = &BTRFS_I(inode)->extent_tree; |
| 1032 | spin_lock(&em_tree->lock); |
| 1033 | em = lookup_extent_mapping(em_tree, offset, PAGE_CACHE_SIZE); |
| 1034 | spin_unlock(&em_tree->lock); |
Chris Mason | 8964222 | 2008-07-24 09:41:53 -0400 | [diff] [blame] | 1035 | if (!em) { |
| 1036 | __unplug_io_fn(bdi, page); |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1037 | return; |
Chris Mason | 8964222 | 2008-07-24 09:41:53 -0400 | [diff] [blame] | 1038 | } |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1039 | |
Chris Mason | 8964222 | 2008-07-24 09:41:53 -0400 | [diff] [blame] | 1040 | if (em->block_start >= EXTENT_MAP_LAST_BYTE) { |
| 1041 | free_extent_map(em); |
| 1042 | __unplug_io_fn(bdi, page); |
| 1043 | return; |
| 1044 | } |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1045 | offset = offset - em->start; |
| 1046 | btrfs_unplug_page(&BTRFS_I(inode)->root->fs_info->mapping_tree, |
| 1047 | em->block_start + offset, page); |
| 1048 | free_extent_map(em); |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1049 | } |
| 1050 | |
| 1051 | static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) |
| 1052 | { |
Jan Engelhardt | 51ebc0d | 2008-06-09 22:19:40 -0400 | [diff] [blame] | 1053 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,23) |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1054 | bdi_init(bdi); |
Chris Mason | b248a41 | 2008-04-14 09:48:18 -0400 | [diff] [blame] | 1055 | #endif |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 1056 | bdi->ra_pages = default_backing_dev_info.ra_pages; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1057 | bdi->state = 0; |
| 1058 | bdi->capabilities = default_backing_dev_info.capabilities; |
| 1059 | bdi->unplug_io_fn = btrfs_unplug_io_fn; |
| 1060 | bdi->unplug_io_data = info; |
| 1061 | bdi->congested_fn = btrfs_congested_fn; |
| 1062 | bdi->congested_data = info; |
| 1063 | return 0; |
| 1064 | } |
| 1065 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1066 | static int bio_ready_for_csum(struct bio *bio) |
| 1067 | { |
| 1068 | u64 length = 0; |
| 1069 | u64 buf_len = 0; |
| 1070 | u64 start = 0; |
| 1071 | struct page *page; |
| 1072 | struct extent_io_tree *io_tree = NULL; |
| 1073 | struct btrfs_fs_info *info = NULL; |
| 1074 | struct bio_vec *bvec; |
| 1075 | int i; |
| 1076 | int ret; |
| 1077 | |
| 1078 | bio_for_each_segment(bvec, bio, i) { |
| 1079 | page = bvec->bv_page; |
| 1080 | if (page->private == EXTENT_PAGE_PRIVATE) { |
| 1081 | length += bvec->bv_len; |
| 1082 | continue; |
| 1083 | } |
| 1084 | if (!page->private) { |
| 1085 | length += bvec->bv_len; |
| 1086 | continue; |
| 1087 | } |
| 1088 | length = bvec->bv_len; |
| 1089 | buf_len = page->private >> 2; |
| 1090 | start = page_offset(page) + bvec->bv_offset; |
| 1091 | io_tree = &BTRFS_I(page->mapping->host)->io_tree; |
| 1092 | info = BTRFS_I(page->mapping->host)->root->fs_info; |
| 1093 | } |
| 1094 | /* are we fully contained in this bio? */ |
| 1095 | if (buf_len <= length) |
| 1096 | return 1; |
| 1097 | |
| 1098 | ret = extent_range_uptodate(io_tree, start + length, |
| 1099 | start + buf_len - 1); |
| 1100 | if (ret == 1) |
| 1101 | return ret; |
| 1102 | return ret; |
| 1103 | } |
| 1104 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1105 | /* |
| 1106 | * called by the kthread helper functions to finally call the bio end_io |
| 1107 | * functions. This is where read checksum verification actually happens |
| 1108 | */ |
| 1109 | static void end_workqueue_fn(struct btrfs_work *work) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1110 | { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1111 | struct bio *bio; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1112 | struct end_io_wq *end_io_wq; |
| 1113 | struct btrfs_fs_info *fs_info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1114 | int error; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1115 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1116 | end_io_wq = container_of(work, struct end_io_wq, work); |
| 1117 | bio = end_io_wq->bio; |
| 1118 | fs_info = end_io_wq->info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1119 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1120 | /* metadata bios are special because the whole tree block must |
| 1121 | * be checksummed at once. This makes sure the entire block is in |
| 1122 | * ram and up to date before trying to verify things. For |
| 1123 | * blocksize <= pagesize, it is basically a noop |
| 1124 | */ |
| 1125 | if (end_io_wq->metadata && !bio_ready_for_csum(bio)) { |
| 1126 | btrfs_queue_worker(&fs_info->endio_workers, |
| 1127 | &end_io_wq->work); |
| 1128 | return; |
| 1129 | } |
| 1130 | error = end_io_wq->error; |
| 1131 | bio->bi_private = end_io_wq->private; |
| 1132 | bio->bi_end_io = end_io_wq->end_io; |
| 1133 | kfree(end_io_wq); |
Miguel | 73f61b2 | 2008-04-11 15:50:59 -0400 | [diff] [blame] | 1134 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,23) |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1135 | bio_endio(bio, bio->bi_size, error); |
Miguel | 73f61b2 | 2008-04-11 15:50:59 -0400 | [diff] [blame] | 1136 | #else |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1137 | bio_endio(bio, error); |
Miguel | 73f61b2 | 2008-04-11 15:50:59 -0400 | [diff] [blame] | 1138 | #endif |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 1139 | } |
| 1140 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1141 | static int cleaner_kthread(void *arg) |
| 1142 | { |
| 1143 | struct btrfs_root *root = arg; |
| 1144 | |
| 1145 | do { |
| 1146 | smp_mb(); |
| 1147 | if (root->fs_info->closing) |
| 1148 | break; |
| 1149 | |
| 1150 | vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE); |
| 1151 | mutex_lock(&root->fs_info->cleaner_mutex); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1152 | btrfs_clean_old_snapshots(root); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1153 | mutex_unlock(&root->fs_info->cleaner_mutex); |
| 1154 | |
| 1155 | if (freezing(current)) { |
| 1156 | refrigerator(); |
| 1157 | } else { |
| 1158 | smp_mb(); |
| 1159 | if (root->fs_info->closing) |
| 1160 | break; |
| 1161 | set_current_state(TASK_INTERRUPTIBLE); |
| 1162 | schedule(); |
| 1163 | __set_current_state(TASK_RUNNING); |
| 1164 | } |
| 1165 | } while (!kthread_should_stop()); |
| 1166 | return 0; |
| 1167 | } |
| 1168 | |
| 1169 | static int transaction_kthread(void *arg) |
| 1170 | { |
| 1171 | struct btrfs_root *root = arg; |
| 1172 | struct btrfs_trans_handle *trans; |
| 1173 | struct btrfs_transaction *cur; |
| 1174 | unsigned long now; |
| 1175 | unsigned long delay; |
| 1176 | int ret; |
| 1177 | |
| 1178 | do { |
| 1179 | smp_mb(); |
| 1180 | if (root->fs_info->closing) |
| 1181 | break; |
| 1182 | |
| 1183 | delay = HZ * 30; |
| 1184 | vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE); |
| 1185 | mutex_lock(&root->fs_info->transaction_kthread_mutex); |
| 1186 | |
Chris Mason | ab78c84 | 2008-07-29 16:15:18 -0400 | [diff] [blame] | 1187 | if (root->fs_info->total_ref_cache_size > 20 * 1024 * 1024) { |
| 1188 | printk("btrfs: total reference cache size %Lu\n", |
| 1189 | root->fs_info->total_ref_cache_size); |
| 1190 | } |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1191 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1192 | mutex_lock(&root->fs_info->trans_mutex); |
| 1193 | cur = root->fs_info->running_transaction; |
| 1194 | if (!cur) { |
| 1195 | mutex_unlock(&root->fs_info->trans_mutex); |
| 1196 | goto sleep; |
| 1197 | } |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1198 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1199 | now = get_seconds(); |
| 1200 | if (now < cur->start_time || now - cur->start_time < 30) { |
| 1201 | mutex_unlock(&root->fs_info->trans_mutex); |
| 1202 | delay = HZ * 5; |
| 1203 | goto sleep; |
| 1204 | } |
| 1205 | mutex_unlock(&root->fs_info->trans_mutex); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1206 | trans = btrfs_start_transaction(root, 1); |
| 1207 | ret = btrfs_commit_transaction(trans, root); |
| 1208 | sleep: |
| 1209 | wake_up_process(root->fs_info->cleaner_kthread); |
| 1210 | mutex_unlock(&root->fs_info->transaction_kthread_mutex); |
| 1211 | |
| 1212 | if (freezing(current)) { |
| 1213 | refrigerator(); |
| 1214 | } else { |
| 1215 | if (root->fs_info->closing) |
| 1216 | break; |
| 1217 | set_current_state(TASK_INTERRUPTIBLE); |
| 1218 | schedule_timeout(delay); |
| 1219 | __set_current_state(TASK_RUNNING); |
| 1220 | } |
| 1221 | } while (!kthread_should_stop()); |
| 1222 | return 0; |
| 1223 | } |
| 1224 | |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1225 | struct btrfs_root *open_ctree(struct super_block *sb, |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1226 | struct btrfs_fs_devices *fs_devices, |
| 1227 | char *options) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1228 | { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1229 | u32 sectorsize; |
| 1230 | u32 nodesize; |
| 1231 | u32 leafsize; |
| 1232 | u32 blocksize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1233 | u32 stripesize; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1234 | struct buffer_head *bh; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1235 | struct btrfs_root *extent_root = kmalloc(sizeof(struct btrfs_root), |
| 1236 | GFP_NOFS); |
| 1237 | struct btrfs_root *tree_root = kmalloc(sizeof(struct btrfs_root), |
| 1238 | GFP_NOFS); |
Chris Mason | 8790d50 | 2008-04-03 16:29:03 -0400 | [diff] [blame] | 1239 | struct btrfs_fs_info *fs_info = kzalloc(sizeof(*fs_info), |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1240 | GFP_NOFS); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1241 | struct btrfs_root *chunk_root = kmalloc(sizeof(struct btrfs_root), |
| 1242 | GFP_NOFS); |
| 1243 | struct btrfs_root *dev_root = kmalloc(sizeof(struct btrfs_root), |
| 1244 | GFP_NOFS); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1245 | int ret; |
Yan | e58ca02 | 2008-04-01 11:21:34 -0400 | [diff] [blame] | 1246 | int err = -EINVAL; |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 1247 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 1248 | struct btrfs_super_block *disk_super; |
Chris Mason | 8790d50 | 2008-04-03 16:29:03 -0400 | [diff] [blame] | 1249 | |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1250 | if (!extent_root || !tree_root || !fs_info) { |
| 1251 | err = -ENOMEM; |
| 1252 | goto fail; |
| 1253 | } |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1254 | INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_NOFS); |
Chris Mason | 8fd1779 | 2007-04-19 21:01:03 -0400 | [diff] [blame] | 1255 | INIT_LIST_HEAD(&fs_info->trans_list); |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 1256 | INIT_LIST_HEAD(&fs_info->dead_roots); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1257 | INIT_LIST_HEAD(&fs_info->hashers); |
Chris Mason | ea8c281 | 2008-08-04 23:17:27 -0400 | [diff] [blame] | 1258 | INIT_LIST_HEAD(&fs_info->delalloc_inodes); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1259 | spin_lock_init(&fs_info->hash_lock); |
Chris Mason | 1832a6d | 2007-12-21 16:27:21 -0500 | [diff] [blame] | 1260 | spin_lock_init(&fs_info->delalloc_lock); |
Chris Mason | cee36a0 | 2008-01-15 08:40:48 -0500 | [diff] [blame] | 1261 | spin_lock_init(&fs_info->new_trans_lock); |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1262 | spin_lock_init(&fs_info->ref_cache_lock); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1263 | |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1264 | init_completion(&fs_info->kobj_unregister); |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1265 | fs_info->tree_root = tree_root; |
| 1266 | fs_info->extent_root = extent_root; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1267 | fs_info->chunk_root = chunk_root; |
| 1268 | fs_info->dev_root = dev_root; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1269 | fs_info->fs_devices = fs_devices; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1270 | INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 1271 | INIT_LIST_HEAD(&fs_info->space_info); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1272 | btrfs_mapping_init(&fs_info->mapping_tree); |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 1273 | atomic_set(&fs_info->nr_async_submits, 0); |
Chris Mason | 0986fe9e | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 1274 | atomic_set(&fs_info->nr_async_bios, 0); |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1275 | atomic_set(&fs_info->throttles, 0); |
Chris Mason | ab78c84 | 2008-07-29 16:15:18 -0400 | [diff] [blame] | 1276 | atomic_set(&fs_info->throttle_gen, 0); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1277 | fs_info->sb = sb; |
Chris Mason | c59f895 | 2007-12-17 20:14:04 -0500 | [diff] [blame] | 1278 | fs_info->max_extent = (u64)-1; |
Chris Mason | 6f568d3 | 2008-01-29 16:03:38 -0500 | [diff] [blame] | 1279 | fs_info->max_inline = 8192 * 1024; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1280 | setup_bdi(fs_info, &fs_info->bdi); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1281 | fs_info->btree_inode = new_inode(sb); |
| 1282 | fs_info->btree_inode->i_ino = 1; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 1283 | fs_info->btree_inode->i_nlink = 1; |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 1284 | fs_info->thread_pool_size = min(num_online_cpus() + 2, 8); |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 1285 | |
Chris Mason | 3eaa288 | 2008-07-24 11:57:52 -0400 | [diff] [blame] | 1286 | INIT_LIST_HEAD(&fs_info->ordered_extents); |
| 1287 | spin_lock_init(&fs_info->ordered_extent_lock); |
| 1288 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1289 | sb->s_blocksize = 4096; |
| 1290 | sb->s_blocksize_bits = blksize_bits(4096); |
| 1291 | |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 1292 | /* |
| 1293 | * we set the i_size on the btree inode to the max possible int. |
| 1294 | * the real end of the address space is determined by all of |
| 1295 | * the devices in the system |
| 1296 | */ |
| 1297 | fs_info->btree_inode->i_size = OFFSET_MAX; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1298 | fs_info->btree_inode->i_mapping->a_ops = &btree_aops; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1299 | fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; |
| 1300 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1301 | extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1302 | fs_info->btree_inode->i_mapping, |
| 1303 | GFP_NOFS); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1304 | extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree, |
| 1305 | GFP_NOFS); |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 1306 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1307 | BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; |
| 1308 | |
| 1309 | extent_io_tree_init(&fs_info->free_space_cache, |
Chris Mason | f510cfe | 2007-10-15 16:14:48 -0400 | [diff] [blame] | 1310 | fs_info->btree_inode->i_mapping, GFP_NOFS); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1311 | extent_io_tree_init(&fs_info->block_group_cache, |
Chris Mason | 96b5179 | 2007-10-15 16:15:19 -0400 | [diff] [blame] | 1312 | fs_info->btree_inode->i_mapping, GFP_NOFS); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1313 | extent_io_tree_init(&fs_info->pinned_extents, |
Chris Mason | 1a5bc16 | 2007-10-15 16:15:26 -0400 | [diff] [blame] | 1314 | fs_info->btree_inode->i_mapping, GFP_NOFS); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1315 | extent_io_tree_init(&fs_info->pending_del, |
Chris Mason | 1a5bc16 | 2007-10-15 16:15:26 -0400 | [diff] [blame] | 1316 | fs_info->btree_inode->i_mapping, GFP_NOFS); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1317 | extent_io_tree_init(&fs_info->extent_ins, |
Chris Mason | 1a5bc16 | 2007-10-15 16:15:26 -0400 | [diff] [blame] | 1318 | fs_info->btree_inode->i_mapping, GFP_NOFS); |
Chris Mason | e66f709 | 2007-04-20 13:16:02 -0400 | [diff] [blame] | 1319 | fs_info->do_barriers = 1; |
Chris Mason | e18e480 | 2008-01-18 10:54:22 -0500 | [diff] [blame] | 1320 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1321 | BTRFS_I(fs_info->btree_inode)->root = tree_root; |
| 1322 | memset(&BTRFS_I(fs_info->btree_inode)->location, 0, |
| 1323 | sizeof(struct btrfs_key)); |
Chris Mason | 22b0ebd | 2007-03-30 08:47:31 -0400 | [diff] [blame] | 1324 | insert_inode_hash(fs_info->btree_inode); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1325 | mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1326 | |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 1327 | mutex_init(&fs_info->trans_mutex); |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1328 | mutex_init(&fs_info->drop_mutex); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1329 | mutex_init(&fs_info->alloc_mutex); |
| 1330 | mutex_init(&fs_info->chunk_mutex); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1331 | mutex_init(&fs_info->transaction_kthread_mutex); |
| 1332 | mutex_init(&fs_info->cleaner_mutex); |
Chris Mason | 7d9eb12 | 2008-07-08 14:19:17 -0400 | [diff] [blame] | 1333 | mutex_init(&fs_info->volume_mutex); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 1334 | init_waitqueue_head(&fs_info->transaction_throttle); |
Chris Mason | f929574 | 2008-07-17 12:54:14 -0400 | [diff] [blame] | 1335 | init_waitqueue_head(&fs_info->transaction_wait); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1336 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1337 | #if 0 |
| 1338 | ret = add_hasher(fs_info, "crc32c"); |
| 1339 | if (ret) { |
| 1340 | printk("btrfs: failed hash setup, modprobe cryptomgr?\n"); |
| 1341 | err = -ENOMEM; |
| 1342 | goto fail_iput; |
| 1343 | } |
| 1344 | #endif |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1345 | __setup_root(4096, 4096, 4096, 4096, tree_root, |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 1346 | fs_info, BTRFS_ROOT_TREE_OBJECTID); |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 1347 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1348 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1349 | bh = __bread(fs_devices->latest_bdev, |
| 1350 | BTRFS_SUPER_INFO_OFFSET / 4096, 4096); |
| 1351 | if (!bh) |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1352 | goto fail_iput; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1353 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1354 | memcpy(&fs_info->super_copy, bh->b_data, sizeof(fs_info->super_copy)); |
| 1355 | brelse(bh); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1356 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1357 | memcpy(fs_info->fsid, fs_info->super_copy.fsid, BTRFS_FSID_SIZE); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1358 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1359 | disk_super = &fs_info->super_copy; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1360 | if (!btrfs_super_root(disk_super)) |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1361 | goto fail_sb_buffer; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1362 | |
Christoph Hellwig | edf24ab | 2008-06-10 10:40:29 -0400 | [diff] [blame] | 1363 | err = btrfs_parse_options(tree_root, options); |
| 1364 | if (err) |
| 1365 | goto fail_sb_buffer; |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1366 | |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 1367 | /* |
| 1368 | * we need to start all the end_io workers up front because the |
| 1369 | * queue work function gets called at interrupt time, and so it |
| 1370 | * cannot dynamically grow. |
| 1371 | */ |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame^] | 1372 | btrfs_init_workers(&fs_info->workers, "worker", |
| 1373 | fs_info->thread_pool_size); |
| 1374 | btrfs_init_workers(&fs_info->submit_workers, "submit", |
Chris Mason | b720d20 | 2008-08-15 15:34:14 -0400 | [diff] [blame] | 1375 | min_t(u64, fs_devices->num_devices, |
| 1376 | fs_info->thread_pool_size)); |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 1377 | |
| 1378 | /* a higher idle thresh on the submit workers makes it much more |
| 1379 | * likely that bios will be send down in a sane order to the |
| 1380 | * devices |
| 1381 | */ |
| 1382 | fs_info->submit_workers.idle_thresh = 64; |
| 1383 | |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame^] | 1384 | btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1); |
| 1385 | btrfs_init_workers(&fs_info->endio_workers, "endio", |
| 1386 | fs_info->thread_pool_size); |
| 1387 | btrfs_init_workers(&fs_info->endio_write_workers, "endio-write", |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 1388 | fs_info->thread_pool_size); |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 1389 | |
| 1390 | /* |
| 1391 | * endios are largely parallel and should have a very |
| 1392 | * low idle thresh |
| 1393 | */ |
| 1394 | fs_info->endio_workers.idle_thresh = 4; |
| 1395 | fs_info->endio_write_workers.idle_thresh = 4; |
| 1396 | |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 1397 | btrfs_start_workers(&fs_info->workers, 1); |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 1398 | btrfs_start_workers(&fs_info->submit_workers, 1); |
Chris Mason | 247e743 | 2008-07-17 12:53:51 -0400 | [diff] [blame] | 1399 | btrfs_start_workers(&fs_info->fixup_workers, 1); |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 1400 | btrfs_start_workers(&fs_info->endio_workers, fs_info->thread_pool_size); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 1401 | btrfs_start_workers(&fs_info->endio_write_workers, |
| 1402 | fs_info->thread_pool_size); |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 1403 | |
Christoph Hellwig | edf24ab | 2008-06-10 10:40:29 -0400 | [diff] [blame] | 1404 | err = -EINVAL; |
Chris Mason | a0af469 | 2008-05-13 16:03:06 -0400 | [diff] [blame] | 1405 | if (btrfs_super_num_devices(disk_super) > fs_devices->open_devices) { |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1406 | printk("Btrfs: wanted %llu devices, but found %llu\n", |
| 1407 | (unsigned long long)btrfs_super_num_devices(disk_super), |
Chris Mason | a0af469 | 2008-05-13 16:03:06 -0400 | [diff] [blame] | 1408 | (unsigned long long)fs_devices->open_devices); |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1409 | if (btrfs_test_opt(tree_root, DEGRADED)) |
| 1410 | printk("continuing in degraded mode\n"); |
| 1411 | else { |
| 1412 | goto fail_sb_buffer; |
| 1413 | } |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1414 | } |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1415 | |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 1416 | fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); |
| 1417 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1418 | nodesize = btrfs_super_nodesize(disk_super); |
| 1419 | leafsize = btrfs_super_leafsize(disk_super); |
| 1420 | sectorsize = btrfs_super_sectorsize(disk_super); |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1421 | stripesize = btrfs_super_stripesize(disk_super); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1422 | tree_root->nodesize = nodesize; |
| 1423 | tree_root->leafsize = leafsize; |
| 1424 | tree_root->sectorsize = sectorsize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1425 | tree_root->stripesize = stripesize; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1426 | |
| 1427 | sb->s_blocksize = sectorsize; |
| 1428 | sb->s_blocksize_bits = blksize_bits(sectorsize); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1429 | |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1430 | if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC, |
| 1431 | sizeof(disk_super->magic))) { |
| 1432 | printk("btrfs: valid FS not found on %s\n", sb->s_id); |
| 1433 | goto fail_sb_buffer; |
| 1434 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1435 | |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1436 | mutex_lock(&fs_info->chunk_mutex); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1437 | ret = btrfs_read_sys_array(tree_root); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1438 | mutex_unlock(&fs_info->chunk_mutex); |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 1439 | if (ret) { |
| 1440 | printk("btrfs: failed to read the system array on %s\n", |
| 1441 | sb->s_id); |
| 1442 | goto fail_sys_array; |
| 1443 | } |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1444 | |
| 1445 | blocksize = btrfs_level_size(tree_root, |
| 1446 | btrfs_super_chunk_root_level(disk_super)); |
| 1447 | |
| 1448 | __setup_root(nodesize, leafsize, sectorsize, stripesize, |
| 1449 | chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); |
| 1450 | |
| 1451 | chunk_root->node = read_tree_block(chunk_root, |
| 1452 | btrfs_super_chunk_root(disk_super), |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 1453 | blocksize, 0); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1454 | BUG_ON(!chunk_root->node); |
| 1455 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1456 | read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, |
| 1457 | (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node), |
| 1458 | BTRFS_UUID_SIZE); |
| 1459 | |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1460 | mutex_lock(&fs_info->chunk_mutex); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1461 | ret = btrfs_read_chunk_tree(chunk_root); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1462 | mutex_unlock(&fs_info->chunk_mutex); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1463 | BUG_ON(ret); |
| 1464 | |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1465 | btrfs_close_extra_devices(fs_devices); |
| 1466 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1467 | blocksize = btrfs_level_size(tree_root, |
| 1468 | btrfs_super_root_level(disk_super)); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1469 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1470 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1471 | tree_root->node = read_tree_block(tree_root, |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1472 | btrfs_super_root(disk_super), |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 1473 | blocksize, 0); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1474 | if (!tree_root->node) |
| 1475 | goto fail_sb_buffer; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1476 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1477 | |
| 1478 | ret = find_and_setup_root(tree_root, fs_info, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1479 | BTRFS_EXTENT_TREE_OBJECTID, extent_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1480 | if (ret) |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1481 | goto fail_tree_root; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1482 | extent_root->track_dirty = 1; |
| 1483 | |
| 1484 | ret = find_and_setup_root(tree_root, fs_info, |
| 1485 | BTRFS_DEV_TREE_OBJECTID, dev_root); |
| 1486 | dev_root->track_dirty = 1; |
| 1487 | |
| 1488 | if (ret) |
| 1489 | goto fail_extent_root; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1490 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1491 | btrfs_read_block_groups(extent_root); |
| 1492 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1493 | fs_info->generation = btrfs_super_generation(disk_super) + 1; |
Chris Mason | d18a2c4 | 2008-04-04 15:40:00 -0400 | [diff] [blame] | 1494 | fs_info->data_alloc_profile = (u64)-1; |
| 1495 | fs_info->metadata_alloc_profile = (u64)-1; |
| 1496 | fs_info->system_alloc_profile = fs_info->metadata_alloc_profile; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1497 | fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, |
| 1498 | "btrfs-cleaner"); |
| 1499 | if (!fs_info->cleaner_kthread) |
| 1500 | goto fail_extent_root; |
| 1501 | |
| 1502 | fs_info->transaction_kthread = kthread_run(transaction_kthread, |
| 1503 | tree_root, |
| 1504 | "btrfs-transaction"); |
| 1505 | if (!fs_info->transaction_kthread) |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1506 | goto fail_cleaner; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1507 | |
Chris Mason | d18a2c4 | 2008-04-04 15:40:00 -0400 | [diff] [blame] | 1508 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1509 | return tree_root; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1510 | |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1511 | fail_cleaner: |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1512 | kthread_stop(fs_info->cleaner_kthread); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1513 | fail_extent_root: |
| 1514 | free_extent_buffer(extent_root->node); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1515 | fail_tree_root: |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1516 | free_extent_buffer(tree_root->node); |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 1517 | fail_sys_array: |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1518 | fail_sb_buffer: |
Chris Mason | 247e743 | 2008-07-17 12:53:51 -0400 | [diff] [blame] | 1519 | btrfs_stop_workers(&fs_info->fixup_workers); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1520 | btrfs_stop_workers(&fs_info->workers); |
| 1521 | btrfs_stop_workers(&fs_info->endio_workers); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 1522 | btrfs_stop_workers(&fs_info->endio_write_workers); |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 1523 | btrfs_stop_workers(&fs_info->submit_workers); |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 1524 | fail_iput: |
| 1525 | iput(fs_info->btree_inode); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1526 | fail: |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1527 | btrfs_close_devices(fs_info->fs_devices); |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 1528 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
| 1529 | |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1530 | kfree(extent_root); |
| 1531 | kfree(tree_root); |
Jan Engelhardt | 51ebc0d | 2008-06-09 22:19:40 -0400 | [diff] [blame] | 1532 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,23) |
Chris Mason | 2d2ae54 | 2008-03-26 16:24:23 -0400 | [diff] [blame] | 1533 | bdi_destroy(&fs_info->bdi); |
Chris Mason | b248a41 | 2008-04-14 09:48:18 -0400 | [diff] [blame] | 1534 | #endif |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1535 | kfree(fs_info); |
| 1536 | return ERR_PTR(err); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1537 | } |
| 1538 | |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1539 | static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) |
| 1540 | { |
| 1541 | char b[BDEVNAME_SIZE]; |
| 1542 | |
| 1543 | if (uptodate) { |
| 1544 | set_buffer_uptodate(bh); |
| 1545 | } else { |
| 1546 | if (!buffer_eopnotsupp(bh) && printk_ratelimit()) { |
| 1547 | printk(KERN_WARNING "lost page write due to " |
| 1548 | "I/O error on %s\n", |
| 1549 | bdevname(bh->b_bdev, b)); |
| 1550 | } |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 1551 | /* note, we dont' set_buffer_write_io_error because we have |
| 1552 | * our own ways of dealing with the IO errors |
| 1553 | */ |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1554 | clear_buffer_uptodate(bh); |
| 1555 | } |
| 1556 | unlock_buffer(bh); |
| 1557 | put_bh(bh); |
| 1558 | } |
| 1559 | |
| 1560 | int write_all_supers(struct btrfs_root *root) |
| 1561 | { |
| 1562 | struct list_head *cur; |
| 1563 | struct list_head *head = &root->fs_info->fs_devices->devices; |
| 1564 | struct btrfs_device *dev; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1565 | struct btrfs_super_block *sb; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1566 | struct btrfs_dev_item *dev_item; |
| 1567 | struct buffer_head *bh; |
| 1568 | int ret; |
| 1569 | int do_barriers; |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 1570 | int max_errors; |
| 1571 | int total_errors = 0; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1572 | u32 crc; |
| 1573 | u64 flags; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1574 | |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 1575 | max_errors = btrfs_super_num_devices(&root->fs_info->super_copy) - 1; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1576 | do_barriers = !btrfs_test_opt(root, NOBARRIER); |
| 1577 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1578 | sb = &root->fs_info->super_for_commit; |
| 1579 | dev_item = &sb->dev_item; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1580 | list_for_each(cur, head) { |
| 1581 | dev = list_entry(cur, struct btrfs_device, dev_list); |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1582 | if (!dev->bdev) { |
| 1583 | total_errors++; |
| 1584 | continue; |
| 1585 | } |
| 1586 | if (!dev->in_fs_metadata) |
| 1587 | continue; |
| 1588 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1589 | btrfs_set_stack_device_type(dev_item, dev->type); |
| 1590 | btrfs_set_stack_device_id(dev_item, dev->devid); |
| 1591 | btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes); |
| 1592 | btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used); |
| 1593 | btrfs_set_stack_device_io_align(dev_item, dev->io_align); |
| 1594 | btrfs_set_stack_device_io_width(dev_item, dev->io_width); |
| 1595 | btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); |
| 1596 | memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); |
| 1597 | flags = btrfs_super_flags(sb); |
| 1598 | btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1599 | |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1600 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1601 | crc = ~(u32)0; |
| 1602 | crc = btrfs_csum_data(root, (char *)sb + BTRFS_CSUM_SIZE, crc, |
| 1603 | BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); |
| 1604 | btrfs_csum_final(crc, sb->csum); |
| 1605 | |
| 1606 | bh = __getblk(dev->bdev, BTRFS_SUPER_INFO_OFFSET / 4096, |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1607 | BTRFS_SUPER_INFO_SIZE); |
| 1608 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1609 | memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1610 | dev->pending_io = bh; |
| 1611 | |
| 1612 | get_bh(bh); |
| 1613 | set_buffer_uptodate(bh); |
| 1614 | lock_buffer(bh); |
| 1615 | bh->b_end_io = btrfs_end_buffer_write_sync; |
| 1616 | |
| 1617 | if (do_barriers && dev->barriers) { |
| 1618 | ret = submit_bh(WRITE_BARRIER, bh); |
| 1619 | if (ret == -EOPNOTSUPP) { |
| 1620 | printk("btrfs: disabling barriers on dev %s\n", |
| 1621 | dev->name); |
| 1622 | set_buffer_uptodate(bh); |
| 1623 | dev->barriers = 0; |
| 1624 | get_bh(bh); |
| 1625 | lock_buffer(bh); |
| 1626 | ret = submit_bh(WRITE, bh); |
| 1627 | } |
| 1628 | } else { |
| 1629 | ret = submit_bh(WRITE, bh); |
| 1630 | } |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 1631 | if (ret) |
| 1632 | total_errors++; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1633 | } |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 1634 | if (total_errors > max_errors) { |
| 1635 | printk("btrfs: %d errors while writing supers\n", total_errors); |
| 1636 | BUG(); |
| 1637 | } |
| 1638 | total_errors = 0; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1639 | |
| 1640 | list_for_each(cur, head) { |
| 1641 | dev = list_entry(cur, struct btrfs_device, dev_list); |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1642 | if (!dev->bdev) |
| 1643 | continue; |
| 1644 | if (!dev->in_fs_metadata) |
| 1645 | continue; |
| 1646 | |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1647 | BUG_ON(!dev->pending_io); |
| 1648 | bh = dev->pending_io; |
| 1649 | wait_on_buffer(bh); |
| 1650 | if (!buffer_uptodate(dev->pending_io)) { |
| 1651 | if (do_barriers && dev->barriers) { |
| 1652 | printk("btrfs: disabling barriers on dev %s\n", |
| 1653 | dev->name); |
| 1654 | set_buffer_uptodate(bh); |
| 1655 | get_bh(bh); |
| 1656 | lock_buffer(bh); |
| 1657 | dev->barriers = 0; |
| 1658 | ret = submit_bh(WRITE, bh); |
| 1659 | BUG_ON(ret); |
| 1660 | wait_on_buffer(bh); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 1661 | if (!buffer_uptodate(bh)) |
| 1662 | total_errors++; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1663 | } else { |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 1664 | total_errors++; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1665 | } |
| 1666 | |
| 1667 | } |
| 1668 | dev->pending_io = NULL; |
| 1669 | brelse(bh); |
| 1670 | } |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 1671 | if (total_errors > max_errors) { |
| 1672 | printk("btrfs: %d errors while writing supers\n", total_errors); |
| 1673 | BUG(); |
| 1674 | } |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1675 | return 0; |
| 1676 | } |
| 1677 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1678 | int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 1679 | *root) |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 1680 | { |
Chris Mason | e66f709 | 2007-04-20 13:16:02 -0400 | [diff] [blame] | 1681 | int ret; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 1682 | |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 1683 | ret = write_all_supers(root); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1684 | return ret; |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 1685 | } |
| 1686 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1687 | 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] | 1688 | { |
| 1689 | radix_tree_delete(&fs_info->fs_roots_radix, |
| 1690 | (unsigned long)root->root_key.objectid); |
Chris Mason | b99aa6c | 2008-01-14 14:41:16 -0500 | [diff] [blame] | 1691 | if (root->in_sysfs) |
| 1692 | btrfs_sysfs_del_root(root); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 1693 | if (root->inode) |
| 1694 | iput(root->inode); |
| 1695 | if (root->node) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1696 | free_extent_buffer(root->node); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 1697 | if (root->commit_root) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1698 | free_extent_buffer(root->commit_root); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1699 | if (root->name) |
| 1700 | kfree(root->name); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 1701 | kfree(root); |
| 1702 | return 0; |
| 1703 | } |
| 1704 | |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 1705 | static int del_fs_roots(struct btrfs_fs_info *fs_info) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1706 | { |
| 1707 | int ret; |
| 1708 | struct btrfs_root *gang[8]; |
| 1709 | int i; |
| 1710 | |
| 1711 | while(1) { |
| 1712 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
| 1713 | (void **)gang, 0, |
| 1714 | ARRAY_SIZE(gang)); |
| 1715 | if (!ret) |
| 1716 | break; |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 1717 | for (i = 0; i < ret; i++) |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1718 | btrfs_free_fs_root(fs_info, gang[i]); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1719 | } |
| 1720 | return 0; |
| 1721 | } |
Chris Mason | b4100d6 | 2007-04-12 12:14:00 -0400 | [diff] [blame] | 1722 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1723 | int close_ctree(struct btrfs_root *root) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1724 | { |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1725 | int ret; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1726 | struct btrfs_trans_handle *trans; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1727 | struct btrfs_fs_info *fs_info = root->fs_info; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1728 | |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 1729 | fs_info->closing = 1; |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1730 | smp_mb(); |
| 1731 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1732 | kthread_stop(root->fs_info->transaction_kthread); |
| 1733 | kthread_stop(root->fs_info->cleaner_kthread); |
| 1734 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1735 | btrfs_clean_old_snapshots(root); |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 1736 | trans = btrfs_start_transaction(root, 1); |
Chris Mason | 54aa1f4 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1737 | ret = btrfs_commit_transaction(trans, root); |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 1738 | /* run commit again to drop the original snapshot */ |
| 1739 | trans = btrfs_start_transaction(root, 1); |
| 1740 | btrfs_commit_transaction(trans, root); |
| 1741 | ret = btrfs_write_and_wait_transaction(NULL, root); |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1742 | BUG_ON(ret); |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 1743 | |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 1744 | write_ctree_super(NULL, root); |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 1745 | |
Chris Mason | b0c68f8 | 2008-01-31 11:05:37 -0500 | [diff] [blame] | 1746 | if (fs_info->delalloc_bytes) { |
| 1747 | printk("btrfs: at unmount delalloc count %Lu\n", |
| 1748 | fs_info->delalloc_bytes); |
| 1749 | } |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1750 | if (fs_info->total_ref_cache_size) { |
| 1751 | printk("btrfs: at umount reference cache size %Lu\n", |
| 1752 | fs_info->total_ref_cache_size); |
| 1753 | } |
Yan | bcc63ab | 2008-07-30 16:29:20 -0400 | [diff] [blame] | 1754 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1755 | if (fs_info->extent_root->node) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1756 | free_extent_buffer(fs_info->extent_root->node); |
Chris Mason | f510cfe | 2007-10-15 16:14:48 -0400 | [diff] [blame] | 1757 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1758 | if (fs_info->tree_root->node) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1759 | free_extent_buffer(fs_info->tree_root->node); |
Chris Mason | f510cfe | 2007-10-15 16:14:48 -0400 | [diff] [blame] | 1760 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1761 | if (root->fs_info->chunk_root->node); |
| 1762 | free_extent_buffer(root->fs_info->chunk_root->node); |
| 1763 | |
| 1764 | if (root->fs_info->dev_root->node); |
| 1765 | free_extent_buffer(root->fs_info->dev_root->node); |
| 1766 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1767 | btrfs_free_block_groups(root->fs_info); |
Chris Mason | 4ca8b41 | 2008-08-05 13:30:48 -0400 | [diff] [blame] | 1768 | fs_info->closing = 2; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1769 | del_fs_roots(fs_info); |
Chris Mason | d10c5f3 | 2007-12-17 20:14:04 -0500 | [diff] [blame] | 1770 | |
| 1771 | filemap_write_and_wait(fs_info->btree_inode->i_mapping); |
| 1772 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1773 | truncate_inode_pages(fs_info->btree_inode->i_mapping, 0); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 1774 | |
Chris Mason | 247e743 | 2008-07-17 12:53:51 -0400 | [diff] [blame] | 1775 | btrfs_stop_workers(&fs_info->fixup_workers); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1776 | btrfs_stop_workers(&fs_info->workers); |
| 1777 | btrfs_stop_workers(&fs_info->endio_workers); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 1778 | btrfs_stop_workers(&fs_info->endio_write_workers); |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 1779 | btrfs_stop_workers(&fs_info->submit_workers); |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 1780 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1781 | iput(fs_info->btree_inode); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1782 | #if 0 |
| 1783 | while(!list_empty(&fs_info->hashers)) { |
| 1784 | struct btrfs_hasher *hasher; |
| 1785 | hasher = list_entry(fs_info->hashers.next, struct btrfs_hasher, |
| 1786 | hashers); |
| 1787 | list_del(&hasher->hashers); |
| 1788 | crypto_free_hash(&fs_info->hash_tfm); |
| 1789 | kfree(hasher); |
| 1790 | } |
| 1791 | #endif |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1792 | btrfs_close_devices(fs_info->fs_devices); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1793 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
Chris Mason | b248a41 | 2008-04-14 09:48:18 -0400 | [diff] [blame] | 1794 | |
Jan Engelhardt | 51ebc0d | 2008-06-09 22:19:40 -0400 | [diff] [blame] | 1795 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,23) |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1796 | bdi_destroy(&fs_info->bdi); |
Chris Mason | b248a41 | 2008-04-14 09:48:18 -0400 | [diff] [blame] | 1797 | #endif |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1798 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1799 | kfree(fs_info->extent_root); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1800 | kfree(fs_info->tree_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1801 | kfree(fs_info->chunk_root); |
| 1802 | kfree(fs_info->dev_root); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1803 | return 0; |
| 1804 | } |
| 1805 | |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 1806 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid) |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 1807 | { |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 1808 | int ret; |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 1809 | struct inode *btree_inode = buf->first_page->mapping->host; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 1810 | |
| 1811 | ret = extent_buffer_uptodate(&BTRFS_I(btree_inode)->io_tree, buf); |
| 1812 | if (!ret) |
| 1813 | return ret; |
| 1814 | |
| 1815 | ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, |
| 1816 | parent_transid); |
| 1817 | return !ret; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1818 | } |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 1819 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1820 | int btrfs_set_buffer_uptodate(struct extent_buffer *buf) |
| 1821 | { |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 1822 | struct inode *btree_inode = buf->first_page->mapping->host; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1823 | return set_extent_buffer_uptodate(&BTRFS_I(btree_inode)->io_tree, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1824 | buf); |
| 1825 | } |
| 1826 | |
| 1827 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf) |
| 1828 | { |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 1829 | struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1830 | u64 transid = btrfs_header_generation(buf); |
| 1831 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 1832 | |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1833 | WARN_ON(!btrfs_tree_locked(buf)); |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 1834 | if (transid != root->fs_info->generation) { |
| 1835 | printk(KERN_CRIT "transid mismatch buffer %llu, found %Lu running %Lu\n", |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1836 | (unsigned long long)buf->start, |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 1837 | transid, root->fs_info->generation); |
| 1838 | WARN_ON(1); |
| 1839 | } |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1840 | set_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, buf); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1841 | } |
| 1842 | |
Chris Mason | d3c2fdcf | 2007-09-17 10:58:06 -0400 | [diff] [blame] | 1843 | void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 1844 | { |
Chris Mason | 188de64 | 2008-05-09 11:52:25 -0400 | [diff] [blame] | 1845 | /* |
| 1846 | * looks as though older kernels can get into trouble with |
| 1847 | * this code, they end up stuck in balance_dirty_pages forever |
| 1848 | */ |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 1849 | struct extent_io_tree *tree; |
| 1850 | u64 num_dirty; |
| 1851 | u64 start = 0; |
Chris Mason | 777e6bd | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 1852 | unsigned long thresh = 2 * 1024 * 1024; |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 1853 | tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; |
| 1854 | |
| 1855 | if (current_is_pdflush()) |
| 1856 | return; |
| 1857 | |
| 1858 | num_dirty = count_range_bits(tree, &start, (u64)-1, |
| 1859 | thresh, EXTENT_DIRTY); |
| 1860 | if (num_dirty > thresh) { |
| 1861 | balance_dirty_pages_ratelimited_nr( |
Chris Mason | d7fc640 | 2008-02-18 12:12:38 -0500 | [diff] [blame] | 1862 | root->fs_info->btree_inode->i_mapping, 1); |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 1863 | } |
Chris Mason | 188de64 | 2008-05-09 11:52:25 -0400 | [diff] [blame] | 1864 | return; |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 1865 | } |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 1866 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 1867 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 1868 | { |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 1869 | struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1870 | int ret; |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 1871 | ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1872 | if (ret == 0) { |
| 1873 | buf->flags |= EXTENT_UPTODATE; |
| 1874 | } |
| 1875 | return ret; |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 1876 | } |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 1877 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1878 | static struct extent_io_ops btree_extent_io_ops = { |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 1879 | .writepage_io_hook = btree_writepage_io_hook, |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1880 | .readpage_end_io_hook = btree_readpage_end_io_hook, |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1881 | .submit_bio_hook = btree_submit_bio_hook, |
Chris Mason | 239b14b | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1882 | /* note we're sharing with inode.c for the merge bio hook */ |
| 1883 | .merge_bio_hook = btrfs_merge_bio_hook, |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 1884 | }; |