Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1 | #include <linux/module.h> |
| 2 | #include <linux/fs.h> |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame^] | 3 | #include <linux/blkdev.h> |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 4 | #include "ctree.h" |
| 5 | #include "disk-io.h" |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 6 | #include "transaction.h" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 7 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame^] | 8 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 9 | static int check_tree_block(struct btrfs_root *root, struct buffer_head *buf) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 10 | { |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 11 | struct btrfs_node *node = btrfs_buffer_node(buf); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame^] | 12 | if (buf->b_blocknr != btrfs_header_blocknr(&node->header)) { |
Chris Mason | 9a8dd15 | 2007-02-23 08:38:36 -0500 | [diff] [blame] | 13 | BUG(); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame^] | 14 | } |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 15 | if (root->node && btrfs_header_parentid(&node->header) != |
Chris Mason | df2ce34 | 2007-03-23 11:00:45 -0400 | [diff] [blame] | 16 | btrfs_header_parentid(btrfs_buffer_header(root->node))) { |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 17 | BUG(); |
Chris Mason | df2ce34 | 2007-03-23 11:00:45 -0400 | [diff] [blame] | 18 | } |
Chris Mason | 9a8dd15 | 2007-02-23 08:38:36 -0500 | [diff] [blame] | 19 | return 0; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 20 | } |
| 21 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame^] | 22 | struct buffer_head *btrfs_find_tree_block(struct btrfs_root *root, u64 blocknr) |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 23 | { |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame^] | 24 | struct address_space *mapping = root->fs_info->btree_inode->i_mapping; |
| 25 | int blockbits = root->fs_info->sb->s_blocksize_bits; |
| 26 | unsigned long index = blocknr >> (PAGE_CACHE_SHIFT - blockbits); |
| 27 | struct page *page; |
| 28 | struct buffer_head *bh; |
| 29 | struct buffer_head *head; |
| 30 | struct buffer_head *ret = NULL; |
| 31 | |
| 32 | page = find_lock_page(mapping, index); |
| 33 | if (!page) |
| 34 | return NULL; |
| 35 | |
| 36 | if (!page_has_buffers(page)) |
| 37 | goto out_unlock; |
| 38 | |
| 39 | head = page_buffers(page); |
| 40 | bh = head; |
| 41 | do { |
| 42 | if (buffer_mapped(bh) && bh->b_blocknr == blocknr) { |
| 43 | ret = bh; |
| 44 | get_bh(bh); |
| 45 | goto out_unlock; |
| 46 | } |
| 47 | bh = bh->b_this_page; |
| 48 | } while (bh != head); |
| 49 | out_unlock: |
| 50 | unlock_page(page); |
| 51 | page_cache_release(page); |
| 52 | return ret; |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 53 | } |
| 54 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame^] | 55 | struct buffer_head *btrfs_find_create_tree_block(struct btrfs_root *root, |
| 56 | u64 blocknr) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 57 | { |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame^] | 58 | struct address_space *mapping = root->fs_info->btree_inode->i_mapping; |
| 59 | int blockbits = root->fs_info->sb->s_blocksize_bits; |
| 60 | unsigned long index = blocknr >> (PAGE_CACHE_SHIFT - blockbits); |
| 61 | struct page *page; |
| 62 | struct buffer_head *bh; |
| 63 | struct buffer_head *head; |
| 64 | struct buffer_head *ret = NULL; |
| 65 | u64 first_block = index << (PAGE_CACHE_SHIFT - blockbits); |
| 66 | page = grab_cache_page(mapping, index); |
| 67 | if (!page) |
| 68 | return NULL; |
| 69 | |
| 70 | wait_on_page_writeback(page); |
| 71 | if (!page_has_buffers(page)) |
| 72 | create_empty_buffers(page, root->fs_info->sb->s_blocksize, 0); |
| 73 | head = page_buffers(page); |
| 74 | bh = head; |
| 75 | do { |
| 76 | if (!buffer_mapped(bh)) { |
| 77 | bh->b_bdev = root->fs_info->sb->s_bdev; |
| 78 | bh->b_blocknr = first_block; |
| 79 | set_buffer_mapped(bh); |
| 80 | } |
| 81 | if (bh->b_blocknr == blocknr) { |
| 82 | ret = bh; |
| 83 | get_bh(bh); |
| 84 | goto out_unlock; |
| 85 | } |
| 86 | bh = bh->b_this_page; |
| 87 | first_block++; |
| 88 | } while (bh != head); |
| 89 | out_unlock: |
| 90 | unlock_page(page); |
| 91 | page_cache_release(page); |
| 92 | return ret; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 93 | } |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 94 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame^] | 95 | static sector_t max_block(struct block_device *bdev) |
| 96 | { |
| 97 | sector_t retval = ~((sector_t)0); |
| 98 | loff_t sz = i_size_read(bdev->bd_inode); |
| 99 | |
| 100 | if (sz) { |
| 101 | unsigned int size = block_size(bdev); |
| 102 | unsigned int sizebits = blksize_bits(size); |
| 103 | retval = (sz >> sizebits); |
| 104 | } |
| 105 | return retval; |
| 106 | } |
| 107 | |
| 108 | static int btree_get_block(struct inode *inode, sector_t iblock, |
| 109 | struct buffer_head *bh, int create) |
| 110 | { |
| 111 | if (iblock >= max_block(inode->i_sb->s_bdev)) { |
| 112 | if (create) |
| 113 | return -EIO; |
| 114 | |
| 115 | /* |
| 116 | * for reads, we're just trying to fill a partial page. |
| 117 | * return a hole, they will have to call get_block again |
| 118 | * before they can fill it, and they will get -EIO at that |
| 119 | * time |
| 120 | */ |
| 121 | return 0; |
| 122 | } |
| 123 | bh->b_bdev = inode->i_sb->s_bdev; |
| 124 | bh->b_blocknr = iblock; |
| 125 | set_buffer_mapped(bh); |
| 126 | return 0; |
| 127 | } |
| 128 | |
| 129 | static int btree_writepage(struct page *page, struct writeback_control *wbc) |
| 130 | { |
| 131 | return block_write_full_page(page, btree_get_block, wbc); |
| 132 | } |
| 133 | |
| 134 | static int btree_readpage(struct file * file, struct page * page) |
| 135 | { |
| 136 | return block_read_full_page(page, btree_get_block); |
| 137 | } |
| 138 | |
| 139 | static struct address_space_operations btree_aops = { |
| 140 | .readpage = btree_readpage, |
| 141 | .writepage = btree_writepage, |
| 142 | .sync_page = block_sync_page, |
| 143 | }; |
| 144 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 145 | struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr) |
| 146 | { |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame^] | 147 | struct buffer_head *bh = NULL; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 148 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame^] | 149 | bh = btrfs_find_create_tree_block(root, blocknr); |
| 150 | if (!bh) |
| 151 | return bh; |
| 152 | lock_buffer(bh); |
| 153 | if (!buffer_uptodate(bh)) { |
| 154 | get_bh(bh); |
| 155 | bh->b_end_io = end_buffer_read_sync; |
| 156 | submit_bh(READ, bh); |
| 157 | wait_on_buffer(bh); |
| 158 | if (!buffer_uptodate(bh)) |
| 159 | goto fail; |
| 160 | } else { |
| 161 | unlock_buffer(bh); |
| 162 | } |
| 163 | if (check_tree_block(root, bh)) |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 164 | BUG(); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame^] | 165 | return bh; |
| 166 | fail: |
| 167 | brelse(bh); |
| 168 | return NULL; |
| 169 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 170 | } |
| 171 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 172 | int dirty_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 173 | struct buffer_head *buf) |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 174 | { |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 175 | mark_buffer_dirty(buf); |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 176 | return 0; |
| 177 | } |
| 178 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 179 | int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 180 | struct buffer_head *buf) |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 181 | { |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 182 | clear_buffer_dirty(buf); |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 183 | return 0; |
| 184 | } |
| 185 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 186 | static int __setup_root(struct btrfs_super_block *super, |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 187 | struct btrfs_root *root, |
| 188 | struct btrfs_fs_info *fs_info, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 189 | u64 objectid) |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 190 | { |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 191 | root->node = NULL; |
Chris Mason | a28ec19 | 2007-03-06 20:08:01 -0500 | [diff] [blame] | 192 | root->commit_root = NULL; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 193 | root->blocksize = btrfs_super_blocksize(super); |
| 194 | root->ref_cows = 0; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 195 | root->fs_info = fs_info; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 196 | memset(&root->root_key, 0, sizeof(root->root_key)); |
| 197 | memset(&root->root_item, 0, sizeof(root->root_item)); |
| 198 | return 0; |
| 199 | } |
| 200 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 201 | static int find_and_setup_root(struct btrfs_super_block *super, |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 202 | struct btrfs_root *tree_root, |
| 203 | struct btrfs_fs_info *fs_info, |
| 204 | u64 objectid, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 205 | struct btrfs_root *root) |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 206 | { |
| 207 | int ret; |
| 208 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 209 | __setup_root(super, root, fs_info, objectid); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 210 | ret = btrfs_find_last_root(tree_root, objectid, |
| 211 | &root->root_item, &root->root_key); |
| 212 | BUG_ON(ret); |
| 213 | |
| 214 | root->node = read_tree_block(root, |
| 215 | btrfs_root_blocknr(&root->root_item)); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 216 | BUG_ON(!root->node); |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 217 | return 0; |
| 218 | } |
| 219 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 220 | struct btrfs_root *open_ctree(struct super_block *sb, |
| 221 | struct buffer_head *sb_buffer, |
| 222 | struct btrfs_super_block *disk_super) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 223 | { |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 224 | struct btrfs_root *root = kmalloc(sizeof(struct btrfs_root), |
| 225 | GFP_NOFS); |
| 226 | struct btrfs_root *extent_root = kmalloc(sizeof(struct btrfs_root), |
| 227 | GFP_NOFS); |
| 228 | struct btrfs_root *tree_root = kmalloc(sizeof(struct btrfs_root), |
| 229 | GFP_NOFS); |
| 230 | struct btrfs_root *inode_root = kmalloc(sizeof(struct btrfs_root), |
| 231 | GFP_NOFS); |
| 232 | struct btrfs_fs_info *fs_info = kmalloc(sizeof(*fs_info), |
| 233 | GFP_NOFS); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 234 | int ret; |
| 235 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 236 | if (!btrfs_super_root(disk_super)) |
| 237 | return NULL; |
Chris Mason | 8ef9762 | 2007-03-26 10:15:30 -0400 | [diff] [blame] | 238 | init_bit_radix(&fs_info->pinned_radix); |
| 239 | init_bit_radix(&fs_info->pending_del_radix); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame^] | 240 | sb_set_blocksize(sb, sb_buffer->b_size); |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 241 | fs_info->running_transaction = NULL; |
| 242 | fs_info->fs_root = root; |
| 243 | fs_info->tree_root = tree_root; |
| 244 | fs_info->extent_root = extent_root; |
| 245 | fs_info->inode_root = inode_root; |
| 246 | fs_info->last_inode_alloc = 0; |
| 247 | fs_info->last_inode_alloc_dirid = 0; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 248 | fs_info->disk_super = disk_super; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 249 | fs_info->sb = sb; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame^] | 250 | fs_info->btree_inode = new_inode(sb); |
| 251 | fs_info->btree_inode->i_ino = 1; |
| 252 | fs_info->btree_inode->i_size = sb->s_bdev->bd_inode->i_size; |
| 253 | fs_info->btree_inode->i_mapping->a_ops = &btree_aops; |
| 254 | mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); |
| 255 | |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 256 | mutex_init(&fs_info->trans_mutex); |
Chris Mason | d561c02 | 2007-03-23 19:47:49 -0400 | [diff] [blame] | 257 | mutex_init(&fs_info->fs_mutex); |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 258 | memset(&fs_info->current_insert, 0, sizeof(fs_info->current_insert)); |
| 259 | memset(&fs_info->last_insert, 0, sizeof(fs_info->last_insert)); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 260 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 261 | __setup_root(disk_super, tree_root, fs_info, BTRFS_ROOT_TREE_OBJECTID); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame^] | 262 | |
| 263 | fs_info->sb_buffer = read_tree_block(tree_root, sb_buffer->b_blocknr); |
| 264 | |
| 265 | if (!fs_info->sb_buffer) |
| 266 | return NULL; |
| 267 | |
| 268 | brelse(sb_buffer); |
| 269 | sb_buffer = NULL; |
| 270 | disk_super = (struct btrfs_super_block *)fs_info->sb_buffer->b_data; |
| 271 | fs_info->disk_super = disk_super; |
| 272 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 273 | tree_root->node = read_tree_block(tree_root, |
| 274 | btrfs_super_root(disk_super)); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 275 | BUG_ON(!tree_root->node); |
| 276 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 277 | ret = find_and_setup_root(disk_super, tree_root, fs_info, |
| 278 | BTRFS_EXTENT_TREE_OBJECTID, extent_root); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 279 | BUG_ON(ret); |
| 280 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 281 | ret = find_and_setup_root(disk_super, tree_root, fs_info, |
| 282 | BTRFS_INODE_MAP_OBJECTID, inode_root); |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 283 | BUG_ON(ret); |
| 284 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 285 | ret = find_and_setup_root(disk_super, tree_root, fs_info, |
| 286 | BTRFS_FS_TREE_OBJECTID, root); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 287 | BUG_ON(ret); |
Chris Mason | a28ec19 | 2007-03-06 20:08:01 -0500 | [diff] [blame] | 288 | root->commit_root = root->node; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 289 | get_bh(root->node); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 290 | root->ref_cows = 1; |
Chris Mason | 293ffd5 | 2007-03-20 15:57:25 -0400 | [diff] [blame] | 291 | root->fs_info->generation = root->root_key.offset + 1; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 292 | return root; |
| 293 | } |
| 294 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 295 | int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 296 | *root) |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 297 | { |
Chris Mason | d571976 | 2007-03-23 10:01:08 -0400 | [diff] [blame] | 298 | struct buffer_head *bh = root->fs_info->sb_buffer; |
| 299 | btrfs_set_super_root(root->fs_info->disk_super, |
| 300 | root->fs_info->tree_root->node->b_blocknr); |
| 301 | lock_buffer(bh); |
| 302 | clear_buffer_dirty(bh); |
| 303 | bh->b_end_io = end_buffer_write_sync; |
| 304 | get_bh(bh); |
| 305 | submit_bh(WRITE, bh); |
| 306 | wait_on_buffer(bh); |
| 307 | if (!buffer_uptodate(bh)) { |
| 308 | WARN_ON(1); |
| 309 | return -EIO; |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 310 | } |
| 311 | return 0; |
| 312 | } |
| 313 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 314 | int close_ctree(struct btrfs_root *root) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 315 | { |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 316 | int ret; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 317 | struct btrfs_trans_handle *trans; |
| 318 | |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 319 | trans = btrfs_start_transaction(root, 1); |
| 320 | btrfs_commit_transaction(trans, root); |
| 321 | /* run commit again to drop the original snapshot */ |
| 322 | trans = btrfs_start_transaction(root, 1); |
| 323 | btrfs_commit_transaction(trans, root); |
| 324 | ret = btrfs_write_and_wait_transaction(NULL, root); |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 325 | BUG_ON(ret); |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 326 | write_ctree_super(NULL, root); |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 327 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 328 | if (root->node) |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 329 | btrfs_block_release(root, root->node); |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 330 | if (root->fs_info->extent_root->node) |
| 331 | btrfs_block_release(root->fs_info->extent_root, |
| 332 | root->fs_info->extent_root->node); |
| 333 | if (root->fs_info->inode_root->node) |
| 334 | btrfs_block_release(root->fs_info->inode_root, |
| 335 | root->fs_info->inode_root->node); |
| 336 | if (root->fs_info->tree_root->node) |
| 337 | btrfs_block_release(root->fs_info->tree_root, |
| 338 | root->fs_info->tree_root->node); |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 339 | btrfs_block_release(root, root->commit_root); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 340 | btrfs_block_release(root, root->fs_info->sb_buffer); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame^] | 341 | iput(root->fs_info->btree_inode); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 342 | kfree(root->fs_info->extent_root); |
| 343 | kfree(root->fs_info->inode_root); |
| 344 | kfree(root->fs_info->tree_root); |
| 345 | kfree(root->fs_info); |
| 346 | kfree(root); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 347 | return 0; |
| 348 | } |
| 349 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 350 | void btrfs_block_release(struct btrfs_root *root, struct buffer_head *buf) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 351 | { |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 352 | brelse(buf); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 353 | } |
| 354 | |