Chris Mason | 6cbd557 | 2007-06-12 09:07:21 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 Oracle. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public |
| 6 | * License v2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public |
| 14 | * License along with this program; if not, write to the |
| 15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 16 | * Boston, MA 021110-1307, USA. |
| 17 | */ |
| 18 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 19 | #include <linux/fs.h> |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 20 | #include <linux/blkdev.h> |
Chris Mason | 11bd143 | 2007-06-22 14:16:24 -0400 | [diff] [blame] | 21 | #include <linux/crc32c.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 | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 27 | #include "ctree.h" |
| 28 | #include "disk-io.h" |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 29 | #include "transaction.h" |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 30 | #include "btrfs_inode.h" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 31 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 32 | #if 0 |
| 33 | 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] | 34 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 35 | if (extent_buffer_blocknr(buf) != btrfs_header_blocknr(buf)) { |
| 36 | printk(KERN_CRIT "buf blocknr(buf) is %llu, header is %llu\n", |
| 37 | (unsigned long long)extent_buffer_blocknr(buf), |
| 38 | (unsigned long long)btrfs_header_blocknr(buf)); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 39 | return 1; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 40 | } |
Chris Mason | 9a8dd15 | 2007-02-23 08:38:36 -0500 | [diff] [blame] | 41 | return 0; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 42 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 43 | #endif |
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 | struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, |
| 46 | u64 blocknr) |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 47 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 48 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 49 | return find_extent_buffer(&BTRFS_I(btree_inode)->extent_tree, |
| 50 | blocknr * root->sectorsize, |
| 51 | root->sectorsize, GFP_NOFS); |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 52 | } |
| 53 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 54 | struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 55 | u64 blocknr) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 56 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 57 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 58 | return alloc_extent_buffer(&BTRFS_I(btree_inode)->extent_tree, |
| 59 | blocknr * root->sectorsize, |
| 60 | root->sectorsize, GFP_NOFS); |
| 61 | } |
Chris Mason | 22b0ebd | 2007-03-30 08:47:31 -0400 | [diff] [blame] | 62 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 63 | struct extent_map *btree_get_extent(struct inode *inode, struct page *page, |
| 64 | size_t page_offset, u64 start, u64 end, |
| 65 | int create) |
| 66 | { |
| 67 | struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; |
| 68 | struct extent_map *em; |
| 69 | int ret; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 70 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 71 | again: |
| 72 | em = lookup_extent_mapping(em_tree, start, end); |
| 73 | if (em) { |
| 74 | goto out; |
| 75 | } |
| 76 | em = alloc_extent_map(GFP_NOFS); |
| 77 | if (!em) { |
| 78 | em = ERR_PTR(-ENOMEM); |
| 79 | goto out; |
| 80 | } |
| 81 | em->start = 0; |
| 82 | em->end = (i_size_read(inode) & ~((u64)PAGE_CACHE_SIZE -1)) - 1; |
| 83 | em->block_start = 0; |
| 84 | em->block_end = em->end; |
| 85 | em->bdev = inode->i_sb->s_bdev; |
| 86 | ret = add_extent_mapping(em_tree, em); |
| 87 | if (ret == -EEXIST) { |
| 88 | free_extent_map(em); |
| 89 | em = NULL; |
| 90 | goto again; |
| 91 | } else if (ret) { |
| 92 | em = ERR_PTR(ret); |
| 93 | } |
| 94 | out: |
| 95 | return em; |
| 96 | } |
| 97 | |
| 98 | static int btree_writepage(struct page *page, struct writeback_control *wbc) |
| 99 | { |
| 100 | struct extent_map_tree *tree; |
| 101 | tree = &BTRFS_I(page->mapping->host)->extent_tree; |
| 102 | return extent_write_full_page(tree, page, btree_get_extent, wbc); |
| 103 | } |
| 104 | int btree_readpage(struct file *file, struct page *page) |
| 105 | { |
| 106 | struct extent_map_tree *tree; |
| 107 | tree = &BTRFS_I(page->mapping->host)->extent_tree; |
| 108 | return extent_read_full_page(tree, page, btree_get_extent); |
| 109 | } |
| 110 | |
| 111 | static int btree_releasepage(struct page *page, gfp_t unused_gfp_flags) |
| 112 | { |
| 113 | struct extent_map_tree *tree; |
| 114 | int ret; |
| 115 | |
| 116 | BUG_ON(page->private != 1); |
| 117 | tree = &BTRFS_I(page->mapping->host)->extent_tree; |
| 118 | ret = try_release_extent_mapping(tree, page); |
| 119 | if (ret == 1) { |
| 120 | ClearPagePrivate(page); |
| 121 | set_page_private(page, 0); |
| 122 | page_cache_release(page); |
| 123 | } |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 124 | return ret; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 125 | } |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 126 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 127 | static void btree_invalidatepage(struct page *page, unsigned long offset) |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 128 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 129 | struct extent_map_tree *tree; |
| 130 | tree = &BTRFS_I(page->mapping->host)->extent_tree; |
| 131 | extent_invalidatepage(tree, page, offset); |
| 132 | btree_releasepage(page, GFP_NOFS); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 133 | } |
| 134 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 135 | int btrfs_csum_data(struct btrfs_root * root, char *data, size_t len, |
| 136 | char *result) |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 137 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 138 | return 0; |
| 139 | #if 0 |
Chris Mason | 11bd143 | 2007-06-22 14:16:24 -0400 | [diff] [blame] | 140 | u32 crc; |
| 141 | crc = crc32c(0, data, len); |
| 142 | memcpy(result, &crc, BTRFS_CRC32_SIZE); |
| 143 | return 0; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 144 | #endif |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 145 | } |
Chris Mason | 11bd143 | 2007-06-22 14:16:24 -0400 | [diff] [blame] | 146 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 147 | #if 0 |
| 148 | static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 149 | int verify) |
| 150 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 151 | return 0; |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 152 | char result[BTRFS_CRC32_SIZE]; |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 153 | int ret; |
| 154 | struct btrfs_node *node; |
| 155 | |
| 156 | ret = btrfs_csum_data(root, bh->b_data + BTRFS_CSUM_SIZE, |
| 157 | bh->b_size - BTRFS_CSUM_SIZE, result); |
| 158 | if (ret) |
| 159 | return ret; |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 160 | if (verify) { |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 161 | if (memcmp(bh->b_data, result, BTRFS_CRC32_SIZE)) { |
Chris Mason | 5af3981 | 2007-06-12 07:50:13 -0400 | [diff] [blame] | 162 | printk("btrfs: %s checksum verify failed on %llu\n", |
| 163 | root->fs_info->sb->s_id, |
| 164 | (unsigned long long)bh_blocknr(bh)); |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 165 | return 1; |
| 166 | } |
| 167 | } else { |
| 168 | node = btrfs_buffer_node(bh); |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 169 | memcpy(node->header.csum, result, BTRFS_CRC32_SIZE); |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 170 | } |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 171 | return 0; |
| 172 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 173 | #endif |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 174 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 175 | #if 0 |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 176 | static int btree_writepage(struct page *page, struct writeback_control *wbc) |
| 177 | { |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 178 | struct buffer_head *bh; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 179 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 180 | struct buffer_head *head; |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 181 | if (!page_has_buffers(page)) { |
| 182 | create_empty_buffers(page, root->fs_info->sb->s_blocksize, |
| 183 | (1 << BH_Dirty)|(1 << BH_Uptodate)); |
| 184 | } |
| 185 | head = page_buffers(page); |
| 186 | bh = head; |
| 187 | do { |
| 188 | if (buffer_dirty(bh)) |
| 189 | csum_tree_block(root, bh, 0); |
| 190 | bh = bh->b_this_page; |
| 191 | } while (bh != head); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 192 | return block_write_full_page(page, btree_get_block, wbc); |
| 193 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 194 | #endif |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 195 | |
| 196 | static struct address_space_operations btree_aops = { |
| 197 | .readpage = btree_readpage, |
| 198 | .writepage = btree_writepage, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 199 | .releasepage = btree_releasepage, |
| 200 | .invalidatepage = btree_invalidatepage, |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 201 | .sync_page = block_sync_page, |
| 202 | }; |
| 203 | |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 204 | int readahead_tree_block(struct btrfs_root *root, u64 blocknr) |
| 205 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 206 | struct extent_buffer *buf = NULL; |
| 207 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 208 | int ret = 0; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 209 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 210 | buf = btrfs_find_create_tree_block(root, blocknr); |
| 211 | if (!buf) |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 212 | return 0; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 213 | read_extent_buffer_pages(&BTRFS_I(btree_inode)->extent_tree, |
| 214 | buf, 0); |
| 215 | free_extent_buffer(buf); |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 216 | return ret; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 217 | } |
| 218 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 219 | struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 blocknr) |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 220 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 221 | struct extent_buffer *buf = NULL; |
| 222 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 223 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 224 | buf = btrfs_find_create_tree_block(root, blocknr); |
| 225 | if (!buf) |
| 226 | return NULL; |
| 227 | read_extent_buffer_pages(&BTRFS_I(btree_inode)->extent_tree, |
| 228 | buf, 1); |
| 229 | return buf; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 230 | } |
| 231 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 232 | 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] | 233 | struct extent_buffer *buf) |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 234 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 235 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 236 | clear_extent_buffer_dirty(&BTRFS_I(btree_inode)->extent_tree, buf); |
| 237 | return 0; |
| 238 | } |
| 239 | |
| 240 | int wait_on_tree_block_writeback(struct btrfs_root *root, |
| 241 | struct extent_buffer *buf) |
| 242 | { |
| 243 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 244 | wait_on_extent_buffer_writeback(&BTRFS_I(btree_inode)->extent_tree, |
| 245 | buf); |
| 246 | return 0; |
| 247 | } |
| 248 | |
| 249 | int set_tree_block_dirty(struct btrfs_root *root, struct extent_buffer *buf) |
| 250 | { |
| 251 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 252 | set_extent_buffer_dirty(&BTRFS_I(btree_inode)->extent_tree, buf); |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 253 | return 0; |
| 254 | } |
| 255 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 256 | static int __setup_root(int blocksize, |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 257 | struct btrfs_root *root, |
| 258 | struct btrfs_fs_info *fs_info, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 259 | u64 objectid) |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 260 | { |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 261 | root->node = NULL; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 262 | root->inode = NULL; |
Chris Mason | a28ec19 | 2007-03-06 20:08:01 -0500 | [diff] [blame] | 263 | root->commit_root = NULL; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 264 | root->sectorsize = blocksize; |
| 265 | root->nodesize = blocksize; |
| 266 | root->leafsize = blocksize; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 267 | root->ref_cows = 0; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 268 | root->fs_info = fs_info; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 269 | root->objectid = objectid; |
| 270 | root->last_trans = 0; |
Chris Mason | 1b05da2 | 2007-04-10 12:13:09 -0400 | [diff] [blame] | 271 | root->highest_inode = 0; |
| 272 | root->last_inode_alloc = 0; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 273 | root->name = NULL; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 274 | memset(&root->root_key, 0, sizeof(root->root_key)); |
| 275 | memset(&root->root_item, 0, sizeof(root->root_item)); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 276 | memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 277 | memset(&root->root_kobj, 0, sizeof(root->root_kobj)); |
| 278 | init_completion(&root->kobj_unregister); |
Chris Mason | 011410b | 2007-09-10 19:58:36 -0400 | [diff] [blame] | 279 | init_rwsem(&root->snap_sem); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 280 | root->defrag_running = 0; |
| 281 | root->defrag_level = 0; |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 282 | root->root_key.objectid = objectid; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 283 | return 0; |
| 284 | } |
| 285 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 286 | static int find_and_setup_root(int blocksize, |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 287 | struct btrfs_root *tree_root, |
| 288 | struct btrfs_fs_info *fs_info, |
| 289 | u64 objectid, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 290 | struct btrfs_root *root) |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 291 | { |
| 292 | int ret; |
| 293 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 294 | __setup_root(blocksize, root, fs_info, objectid); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 295 | ret = btrfs_find_last_root(tree_root, objectid, |
| 296 | &root->root_item, &root->root_key); |
| 297 | BUG_ON(ret); |
| 298 | |
| 299 | root->node = read_tree_block(root, |
| 300 | btrfs_root_blocknr(&root->root_item)); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 301 | BUG_ON(!root->node); |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 302 | return 0; |
| 303 | } |
| 304 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 305 | struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_fs_info *fs_info, |
| 306 | struct btrfs_key *location) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 307 | { |
| 308 | struct btrfs_root *root; |
| 309 | struct btrfs_root *tree_root = fs_info->tree_root; |
| 310 | struct btrfs_path *path; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 311 | struct extent_buffer *l; |
Chris Mason | 1b05da2 | 2007-04-10 12:13:09 -0400 | [diff] [blame] | 312 | u64 highest_inode; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 313 | int ret = 0; |
| 314 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 315 | root = kzalloc(sizeof(*root), GFP_NOFS); |
Chris Mason | 0cf6c62 | 2007-06-09 09:22:25 -0400 | [diff] [blame] | 316 | if (!root) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 317 | return ERR_PTR(-ENOMEM); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 318 | if (location->offset == (u64)-1) { |
| 319 | ret = find_and_setup_root(fs_info->sb->s_blocksize, |
| 320 | fs_info->tree_root, fs_info, |
| 321 | location->objectid, root); |
| 322 | if (ret) { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 323 | kfree(root); |
| 324 | return ERR_PTR(ret); |
| 325 | } |
| 326 | goto insert; |
| 327 | } |
| 328 | |
| 329 | __setup_root(fs_info->sb->s_blocksize, root, fs_info, |
| 330 | location->objectid); |
| 331 | |
| 332 | path = btrfs_alloc_path(); |
| 333 | BUG_ON(!path); |
| 334 | ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); |
| 335 | if (ret != 0) { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 336 | if (ret > 0) |
| 337 | ret = -ENOENT; |
| 338 | goto out; |
| 339 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 340 | l = path->nodes[0]; |
| 341 | read_extent_buffer(l, &root->root_item, |
| 342 | btrfs_item_ptr_offset(l, path->slots[0]), |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 343 | sizeof(root->root_item)); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 344 | ret = 0; |
| 345 | out: |
| 346 | btrfs_release_path(root, path); |
| 347 | btrfs_free_path(path); |
| 348 | if (ret) { |
| 349 | kfree(root); |
| 350 | return ERR_PTR(ret); |
| 351 | } |
| 352 | root->node = read_tree_block(root, |
| 353 | btrfs_root_blocknr(&root->root_item)); |
| 354 | BUG_ON(!root->node); |
| 355 | insert: |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 356 | root->ref_cows = 1; |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 357 | ret = btrfs_find_highest_inode(root, &highest_inode); |
| 358 | if (ret == 0) { |
| 359 | root->highest_inode = highest_inode; |
| 360 | root->last_inode_alloc = highest_inode; |
| 361 | } |
| 362 | return root; |
| 363 | } |
| 364 | |
| 365 | struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info, |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 366 | struct btrfs_key *location, |
| 367 | const char *name, int namelen) |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 368 | { |
| 369 | struct btrfs_root *root; |
| 370 | int ret; |
| 371 | |
| 372 | root = radix_tree_lookup(&fs_info->fs_roots_radix, |
| 373 | (unsigned long)location->objectid); |
| 374 | if (root) |
| 375 | return root; |
| 376 | |
| 377 | root = btrfs_read_fs_root_no_radix(fs_info, location); |
| 378 | if (IS_ERR(root)) |
| 379 | return root; |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 380 | ret = radix_tree_insert(&fs_info->fs_roots_radix, |
| 381 | (unsigned long)root->root_key.objectid, |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 382 | root); |
| 383 | if (ret) { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 384 | free_extent_buffer(root->node); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 385 | kfree(root); |
| 386 | return ERR_PTR(ret); |
| 387 | } |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 388 | |
| 389 | ret = btrfs_set_root_name(root, name, namelen); |
| 390 | if (ret) { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 391 | free_extent_buffer(root->node); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 392 | kfree(root); |
| 393 | return ERR_PTR(ret); |
| 394 | } |
| 395 | |
| 396 | ret = btrfs_sysfs_add_root(root); |
| 397 | if (ret) { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 398 | free_extent_buffer(root->node); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 399 | kfree(root->name); |
| 400 | kfree(root); |
| 401 | return ERR_PTR(ret); |
| 402 | } |
| 403 | |
Chris Mason | 5ce14bb | 2007-09-11 11:15:39 -0400 | [diff] [blame] | 404 | ret = btrfs_find_dead_roots(fs_info->tree_root, |
| 405 | root->root_key.objectid, root); |
| 406 | BUG_ON(ret); |
| 407 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 408 | return root; |
| 409 | } |
| 410 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 411 | struct btrfs_root *open_ctree(struct super_block *sb) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 412 | { |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 413 | struct btrfs_root *extent_root = kmalloc(sizeof(struct btrfs_root), |
| 414 | GFP_NOFS); |
| 415 | struct btrfs_root *tree_root = kmalloc(sizeof(struct btrfs_root), |
| 416 | GFP_NOFS); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 417 | struct btrfs_fs_info *fs_info = kmalloc(sizeof(*fs_info), |
| 418 | GFP_NOFS); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 419 | int ret; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 420 | int err = -EIO; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 421 | struct btrfs_super_block *disk_super; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 422 | |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 423 | if (!extent_root || !tree_root || !fs_info) { |
| 424 | err = -ENOMEM; |
| 425 | goto fail; |
| 426 | } |
Chris Mason | 8ef9762 | 2007-03-26 10:15:30 -0400 | [diff] [blame] | 427 | init_bit_radix(&fs_info->pinned_radix); |
| 428 | init_bit_radix(&fs_info->pending_del_radix); |
Chris Mason | e37c9e6 | 2007-05-09 20:13:14 -0400 | [diff] [blame] | 429 | init_bit_radix(&fs_info->extent_map_radix); |
Chris Mason | 26b8003 | 2007-08-08 20:17:12 -0400 | [diff] [blame] | 430 | init_bit_radix(&fs_info->extent_ins_radix); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 431 | INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_NOFS); |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 432 | INIT_RADIX_TREE(&fs_info->block_group_radix, GFP_KERNEL); |
Chris Mason | be74417 | 2007-05-06 10:15:01 -0400 | [diff] [blame] | 433 | INIT_RADIX_TREE(&fs_info->block_group_data_radix, GFP_KERNEL); |
Chris Mason | 8fd1779 | 2007-04-19 21:01:03 -0400 | [diff] [blame] | 434 | INIT_LIST_HEAD(&fs_info->trans_list); |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 435 | INIT_LIST_HEAD(&fs_info->dead_roots); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 436 | memset(&fs_info->super_kobj, 0, sizeof(fs_info->super_kobj)); |
| 437 | init_completion(&fs_info->kobj_unregister); |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 438 | sb_set_blocksize(sb, 4096); |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 439 | fs_info->running_transaction = NULL; |
Josef Bacik | 15ee9bc | 2007-08-10 16:22:09 -0400 | [diff] [blame] | 440 | fs_info->last_trans_committed = 0; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 441 | fs_info->tree_root = tree_root; |
| 442 | fs_info->extent_root = extent_root; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 443 | fs_info->sb = sb; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 444 | fs_info->btree_inode = new_inode(sb); |
| 445 | fs_info->btree_inode->i_ino = 1; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 446 | fs_info->btree_inode->i_nlink = 1; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 447 | fs_info->btree_inode->i_size = sb->s_bdev->bd_inode->i_size; |
| 448 | fs_info->btree_inode->i_mapping->a_ops = &btree_aops; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 449 | extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree, |
| 450 | fs_info->btree_inode->i_mapping, |
| 451 | GFP_NOFS); |
Chris Mason | e66f709 | 2007-04-20 13:16:02 -0400 | [diff] [blame] | 452 | fs_info->do_barriers = 1; |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 453 | fs_info->closing = 0; |
| 454 | |
Chris Mason | 08607c1 | 2007-06-08 15:33:54 -0400 | [diff] [blame] | 455 | INIT_DELAYED_WORK(&fs_info->trans_work, btrfs_transaction_cleaner); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 456 | BTRFS_I(fs_info->btree_inode)->root = tree_root; |
| 457 | memset(&BTRFS_I(fs_info->btree_inode)->location, 0, |
| 458 | sizeof(struct btrfs_key)); |
Chris Mason | 22b0ebd | 2007-03-30 08:47:31 -0400 | [diff] [blame] | 459 | insert_inode_hash(fs_info->btree_inode); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 460 | mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 461 | |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 462 | mutex_init(&fs_info->trans_mutex); |
Chris Mason | d561c02 | 2007-03-23 19:47:49 -0400 | [diff] [blame] | 463 | mutex_init(&fs_info->fs_mutex); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 464 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 465 | __setup_root(sb->s_blocksize, tree_root, |
| 466 | fs_info, BTRFS_ROOT_TREE_OBJECTID); |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 467 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 468 | fs_info->sb_buffer = read_tree_block(tree_root, |
| 469 | BTRFS_SUPER_INFO_OFFSET / |
| 470 | sb->s_blocksize); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 471 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 472 | if (!fs_info->sb_buffer) |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 473 | goto fail_iput; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 474 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 475 | read_extent_buffer(fs_info->sb_buffer, &fs_info->super_copy, 0, |
| 476 | sizeof(fs_info->super_copy)); |
| 477 | |
| 478 | read_extent_buffer(fs_info->sb_buffer, fs_info->fsid, |
| 479 | (unsigned long)btrfs_super_fsid(fs_info->sb_buffer), |
| 480 | BTRFS_FSID_SIZE); |
| 481 | disk_super = &fs_info->super_copy; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 482 | if (!btrfs_super_root(disk_super)) |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 483 | goto fail_sb_buffer; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 484 | |
Chris Mason | 8352d8a | 2007-04-12 10:43:05 -0400 | [diff] [blame] | 485 | i_size_write(fs_info->btree_inode, |
| 486 | btrfs_super_total_blocks(disk_super) << |
| 487 | fs_info->btree_inode->i_blkbits); |
| 488 | |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 489 | |
| 490 | if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC, |
| 491 | sizeof(disk_super->magic))) { |
| 492 | printk("btrfs: valid FS not found on %s\n", sb->s_id); |
| 493 | goto fail_sb_buffer; |
| 494 | } |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 495 | tree_root->node = read_tree_block(tree_root, |
| 496 | btrfs_super_root(disk_super)); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 497 | if (!tree_root->node) |
| 498 | goto fail_sb_buffer; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 499 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 500 | mutex_lock(&fs_info->fs_mutex); |
| 501 | ret = find_and_setup_root(sb->s_blocksize, tree_root, fs_info, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 502 | BTRFS_EXTENT_TREE_OBJECTID, extent_root); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 503 | if (ret) { |
| 504 | mutex_unlock(&fs_info->fs_mutex); |
| 505 | goto fail_tree_root; |
| 506 | } |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 507 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 508 | btrfs_read_block_groups(extent_root); |
| 509 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 510 | fs_info->generation = btrfs_super_generation(disk_super) + 1; |
Chris Mason | 5be6f7f | 2007-04-05 13:35:25 -0400 | [diff] [blame] | 511 | mutex_unlock(&fs_info->fs_mutex); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 512 | return tree_root; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 513 | |
| 514 | fail_tree_root: |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 515 | free_extent_buffer(tree_root->node); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 516 | fail_sb_buffer: |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 517 | free_extent_buffer(fs_info->sb_buffer); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 518 | fail_iput: |
| 519 | iput(fs_info->btree_inode); |
| 520 | fail: |
| 521 | kfree(extent_root); |
| 522 | kfree(tree_root); |
| 523 | kfree(fs_info); |
| 524 | return ERR_PTR(err); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 525 | } |
| 526 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 527 | int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 528 | *root) |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 529 | { |
Chris Mason | e66f709 | 2007-04-20 13:16:02 -0400 | [diff] [blame] | 530 | int ret; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 531 | struct extent_buffer *super = root->fs_info->sb_buffer; |
| 532 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 533 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 534 | set_extent_buffer_dirty(&BTRFS_I(btree_inode)->extent_tree, super); |
| 535 | ret = sync_page_range_nolock(btree_inode, btree_inode->i_mapping, |
| 536 | super->start, super->len); |
| 537 | return ret; |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 538 | } |
| 539 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 540 | 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] | 541 | { |
| 542 | radix_tree_delete(&fs_info->fs_roots_radix, |
| 543 | (unsigned long)root->root_key.objectid); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 544 | btrfs_sysfs_del_root(root); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 545 | if (root->inode) |
| 546 | iput(root->inode); |
| 547 | if (root->node) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 548 | free_extent_buffer(root->node); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 549 | if (root->commit_root) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 550 | free_extent_buffer(root->commit_root); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 551 | if (root->name) |
| 552 | kfree(root->name); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 553 | kfree(root); |
| 554 | return 0; |
| 555 | } |
| 556 | |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 557 | static int del_fs_roots(struct btrfs_fs_info *fs_info) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 558 | { |
| 559 | int ret; |
| 560 | struct btrfs_root *gang[8]; |
| 561 | int i; |
| 562 | |
| 563 | while(1) { |
| 564 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
| 565 | (void **)gang, 0, |
| 566 | ARRAY_SIZE(gang)); |
| 567 | if (!ret) |
| 568 | break; |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 569 | for (i = 0; i < ret; i++) |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 570 | btrfs_free_fs_root(fs_info, gang[i]); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 571 | } |
| 572 | return 0; |
| 573 | } |
Chris Mason | b4100d6 | 2007-04-12 12:14:00 -0400 | [diff] [blame] | 574 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 575 | int close_ctree(struct btrfs_root *root) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 576 | { |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 577 | int ret; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 578 | struct btrfs_trans_handle *trans; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 579 | struct btrfs_fs_info *fs_info = root->fs_info; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 580 | |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 581 | fs_info->closing = 1; |
Chris Mason | 08607c1 | 2007-06-08 15:33:54 -0400 | [diff] [blame] | 582 | btrfs_transaction_flush_work(root); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 583 | mutex_lock(&fs_info->fs_mutex); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 584 | btrfs_defrag_dirty_roots(root->fs_info); |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 585 | trans = btrfs_start_transaction(root, 1); |
Chris Mason | 54aa1f4 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 586 | ret = btrfs_commit_transaction(trans, root); |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 587 | /* run commit again to drop the original snapshot */ |
| 588 | trans = btrfs_start_transaction(root, 1); |
| 589 | btrfs_commit_transaction(trans, root); |
| 590 | ret = btrfs_write_and_wait_transaction(NULL, root); |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 591 | BUG_ON(ret); |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 592 | write_ctree_super(NULL, root); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 593 | mutex_unlock(&fs_info->fs_mutex); |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 594 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 595 | if (fs_info->extent_root->node) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 596 | free_extent_buffer(fs_info->extent_root->node); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 597 | if (fs_info->tree_root->node) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 598 | free_extent_buffer(fs_info->tree_root->node); |
| 599 | free_extent_buffer(fs_info->sb_buffer); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 600 | truncate_inode_pages(fs_info->btree_inode->i_mapping, 0); |
| 601 | iput(fs_info->btree_inode); |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 602 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 603 | btrfs_free_block_groups(root->fs_info); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 604 | del_fs_roots(fs_info); |
| 605 | kfree(fs_info->extent_root); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 606 | kfree(fs_info->tree_root); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 607 | return 0; |
| 608 | } |
| 609 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 610 | int btrfs_buffer_uptodate(struct extent_buffer *buf) |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 611 | { |
Chris Mason | 6d36dcd | 2007-10-15 16:14:37 -0400 | [diff] [blame^] | 612 | struct inode *btree_inode = buf->first_page->mapping->host; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 613 | return extent_buffer_uptodate(&BTRFS_I(btree_inode)->extent_tree, buf); |
| 614 | } |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 615 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 616 | int btrfs_set_buffer_uptodate(struct extent_buffer *buf) |
| 617 | { |
Chris Mason | 6d36dcd | 2007-10-15 16:14:37 -0400 | [diff] [blame^] | 618 | struct inode *btree_inode = buf->first_page->mapping->host; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 619 | return set_extent_buffer_uptodate(&BTRFS_I(btree_inode)->extent_tree, |
| 620 | buf); |
| 621 | } |
| 622 | |
| 623 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf) |
| 624 | { |
Chris Mason | 6d36dcd | 2007-10-15 16:14:37 -0400 | [diff] [blame^] | 625 | struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 626 | u64 transid = btrfs_header_generation(buf); |
| 627 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 628 | |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 629 | if (transid != root->fs_info->generation) { |
| 630 | printk(KERN_CRIT "transid mismatch buffer %llu, found %Lu running %Lu\n", |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 631 | (unsigned long long)extent_buffer_blocknr(buf), |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 632 | transid, root->fs_info->generation); |
| 633 | WARN_ON(1); |
| 634 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 635 | set_extent_buffer_dirty(&BTRFS_I(btree_inode)->extent_tree, buf); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 636 | } |
| 637 | |
Chris Mason | d3c2fdcf | 2007-09-17 10:58:06 -0400 | [diff] [blame] | 638 | void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 639 | { |
Chris Mason | d3c2fdcf | 2007-09-17 10:58:06 -0400 | [diff] [blame] | 640 | balance_dirty_pages_ratelimited_nr( |
| 641 | root->fs_info->btree_inode->i_mapping, nr); |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 642 | } |