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 | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 4 | #include <linux/crypto.h> |
| 5 | #include <linux/scatterlist.h> |
Chris Mason | 22b0ebd | 2007-03-30 08:47:31 -0400 | [diff] [blame] | 6 | #include <linux/swap.h> |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 7 | #include <linux/radix-tree.h> |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 8 | #include <linux/writeback.h> |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 9 | #include "ctree.h" |
| 10 | #include "disk-io.h" |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 11 | #include "transaction.h" |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 12 | #include "btrfs_inode.h" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 13 | |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 14 | u64 bh_blocknr(struct buffer_head *bh) |
| 15 | { |
Chris Mason | 0cf6c62 | 2007-06-09 09:22:25 -0400 | [diff] [blame] | 16 | return bh->b_blocknr; |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 17 | } |
| 18 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 19 | 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] | 20 | { |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 21 | struct btrfs_node *node = btrfs_buffer_node(buf); |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 22 | if (bh_blocknr(buf) != btrfs_header_blocknr(&node->header)) { |
Chris Mason | 5af3981 | 2007-06-12 07:50:13 -0400 | [diff] [blame^] | 23 | printk(KERN_CRIT "bh_blocknr(buf) is %llu, header is %llu\n", |
| 24 | (unsigned long long)bh_blocknr(buf), |
| 25 | (unsigned long long)btrfs_header_blocknr(&node->header)); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 26 | return 1; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 27 | } |
Chris Mason | 9a8dd15 | 2007-02-23 08:38:36 -0500 | [diff] [blame] | 28 | return 0; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 29 | } |
| 30 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 31 | 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] | 32 | { |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 33 | struct address_space *mapping = root->fs_info->btree_inode->i_mapping; |
| 34 | int blockbits = root->fs_info->sb->s_blocksize_bits; |
| 35 | unsigned long index = blocknr >> (PAGE_CACHE_SHIFT - blockbits); |
| 36 | struct page *page; |
| 37 | struct buffer_head *bh; |
| 38 | struct buffer_head *head; |
| 39 | struct buffer_head *ret = NULL; |
| 40 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 41 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 42 | page = find_lock_page(mapping, index); |
| 43 | if (!page) |
| 44 | return NULL; |
| 45 | |
| 46 | if (!page_has_buffers(page)) |
| 47 | goto out_unlock; |
| 48 | |
| 49 | head = page_buffers(page); |
| 50 | bh = head; |
| 51 | do { |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 52 | if (buffer_mapped(bh) && bh_blocknr(bh) == blocknr) { |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 53 | ret = bh; |
| 54 | get_bh(bh); |
| 55 | goto out_unlock; |
| 56 | } |
| 57 | bh = bh->b_this_page; |
| 58 | } while (bh != head); |
| 59 | out_unlock: |
| 60 | unlock_page(page); |
| 61 | page_cache_release(page); |
| 62 | return ret; |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 63 | } |
| 64 | |
Chris Mason | 8352d8a | 2007-04-12 10:43:05 -0400 | [diff] [blame] | 65 | int btrfs_map_bh_to_logical(struct btrfs_root *root, struct buffer_head *bh, |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 66 | u64 logical) |
| 67 | { |
Chris Mason | 236454d | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 68 | if (logical == 0) { |
| 69 | bh->b_bdev = NULL; |
| 70 | bh->b_blocknr = 0; |
| 71 | set_buffer_mapped(bh); |
Chris Mason | 0cf6c62 | 2007-06-09 09:22:25 -0400 | [diff] [blame] | 72 | } else { |
| 73 | map_bh(bh, root->fs_info->sb, logical); |
Chris Mason | 236454d | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 74 | } |
Chris Mason | 0cf6c62 | 2007-06-09 09:22:25 -0400 | [diff] [blame] | 75 | return 0; |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 76 | } |
| 77 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 78 | struct buffer_head *btrfs_find_create_tree_block(struct btrfs_root *root, |
| 79 | u64 blocknr) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 80 | { |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 81 | struct address_space *mapping = root->fs_info->btree_inode->i_mapping; |
| 82 | int blockbits = root->fs_info->sb->s_blocksize_bits; |
| 83 | unsigned long index = blocknr >> (PAGE_CACHE_SHIFT - blockbits); |
| 84 | struct page *page; |
| 85 | struct buffer_head *bh; |
| 86 | struct buffer_head *head; |
| 87 | struct buffer_head *ret = NULL; |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 88 | int err; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 89 | u64 first_block = index << (PAGE_CACHE_SHIFT - blockbits); |
Chris Mason | 22b0ebd | 2007-03-30 08:47:31 -0400 | [diff] [blame] | 90 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 91 | page = grab_cache_page(mapping, index); |
| 92 | if (!page) |
| 93 | return NULL; |
| 94 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 95 | if (!page_has_buffers(page)) |
| 96 | create_empty_buffers(page, root->fs_info->sb->s_blocksize, 0); |
| 97 | head = page_buffers(page); |
| 98 | bh = head; |
| 99 | do { |
| 100 | if (!buffer_mapped(bh)) { |
Chris Mason | 8352d8a | 2007-04-12 10:43:05 -0400 | [diff] [blame] | 101 | err = btrfs_map_bh_to_logical(root, bh, first_block); |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 102 | BUG_ON(err); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 103 | } |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 104 | if (bh_blocknr(bh) == blocknr) { |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 105 | ret = bh; |
| 106 | get_bh(bh); |
| 107 | goto out_unlock; |
| 108 | } |
| 109 | bh = bh->b_this_page; |
| 110 | first_block++; |
| 111 | } while (bh != head); |
| 112 | out_unlock: |
| 113 | unlock_page(page); |
Chris Mason | 22b0ebd | 2007-03-30 08:47:31 -0400 | [diff] [blame] | 114 | if (ret) |
| 115 | touch_buffer(ret); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 116 | page_cache_release(page); |
| 117 | return ret; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 118 | } |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 119 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 120 | static int btree_get_block(struct inode *inode, sector_t iblock, |
| 121 | struct buffer_head *bh, int create) |
| 122 | { |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 123 | int err; |
| 124 | struct btrfs_root *root = BTRFS_I(bh->b_page->mapping->host)->root; |
Chris Mason | 8352d8a | 2007-04-12 10:43:05 -0400 | [diff] [blame] | 125 | err = btrfs_map_bh_to_logical(root, bh, iblock); |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 126 | return err; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 127 | } |
| 128 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 129 | int btrfs_csum_data(struct btrfs_root * root, char *data, size_t len, |
| 130 | char *result) |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 131 | { |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 132 | struct scatterlist sg; |
| 133 | struct crypto_hash *tfm = root->fs_info->hash_tfm; |
| 134 | struct hash_desc desc; |
| 135 | int ret; |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 136 | |
| 137 | desc.tfm = tfm; |
| 138 | desc.flags = 0; |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 139 | sg_init_one(&sg, data, len); |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 140 | spin_lock(&root->fs_info->hash_lock); |
Chris Mason | 22b0ebd | 2007-03-30 08:47:31 -0400 | [diff] [blame] | 141 | ret = crypto_hash_digest(&desc, &sg, 1, result); |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 142 | spin_unlock(&root->fs_info->hash_lock); |
| 143 | if (ret) { |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 144 | printk("digest failed\n"); |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 145 | } |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 146 | return ret; |
| 147 | } |
| 148 | static int csum_tree_block(struct btrfs_root *root, struct buffer_head *bh, |
| 149 | int verify) |
| 150 | { |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 151 | char result[BTRFS_CRC32_SIZE]; |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 152 | int ret; |
| 153 | struct btrfs_node *node; |
| 154 | |
| 155 | ret = btrfs_csum_data(root, bh->b_data + BTRFS_CSUM_SIZE, |
| 156 | bh->b_size - BTRFS_CSUM_SIZE, result); |
| 157 | if (ret) |
| 158 | return ret; |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 159 | if (verify) { |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 160 | if (memcmp(bh->b_data, result, BTRFS_CRC32_SIZE)) { |
Chris Mason | 5af3981 | 2007-06-12 07:50:13 -0400 | [diff] [blame^] | 161 | printk("btrfs: %s checksum verify failed on %llu\n", |
| 162 | root->fs_info->sb->s_id, |
| 163 | (unsigned long long)bh_blocknr(bh)); |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 164 | return 1; |
| 165 | } |
| 166 | } else { |
| 167 | node = btrfs_buffer_node(bh); |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 168 | memcpy(node->header.csum, result, BTRFS_CRC32_SIZE); |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 169 | } |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 170 | return 0; |
| 171 | } |
| 172 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 173 | static int btree_writepage(struct page *page, struct writeback_control *wbc) |
| 174 | { |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 175 | struct buffer_head *bh; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 176 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 177 | struct buffer_head *head; |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 178 | if (!page_has_buffers(page)) { |
| 179 | create_empty_buffers(page, root->fs_info->sb->s_blocksize, |
| 180 | (1 << BH_Dirty)|(1 << BH_Uptodate)); |
| 181 | } |
| 182 | head = page_buffers(page); |
| 183 | bh = head; |
| 184 | do { |
| 185 | if (buffer_dirty(bh)) |
| 186 | csum_tree_block(root, bh, 0); |
| 187 | bh = bh->b_this_page; |
| 188 | } while (bh != head); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 189 | return block_write_full_page(page, btree_get_block, wbc); |
| 190 | } |
| 191 | |
| 192 | static int btree_readpage(struct file * file, struct page * page) |
| 193 | { |
| 194 | return block_read_full_page(page, btree_get_block); |
| 195 | } |
| 196 | |
| 197 | static struct address_space_operations btree_aops = { |
| 198 | .readpage = btree_readpage, |
| 199 | .writepage = btree_writepage, |
| 200 | .sync_page = block_sync_page, |
| 201 | }; |
| 202 | |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 203 | int readahead_tree_block(struct btrfs_root *root, u64 blocknr) |
| 204 | { |
| 205 | struct buffer_head *bh = NULL; |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 206 | int ret = 0; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 207 | |
| 208 | bh = btrfs_find_create_tree_block(root, blocknr); |
| 209 | if (!bh) |
| 210 | return 0; |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 211 | if (buffer_uptodate(bh)) { |
| 212 | ret = 1; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 213 | goto done; |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 214 | } |
| 215 | if (test_set_buffer_locked(bh)) { |
| 216 | ret = 1; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 217 | goto done; |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 218 | } |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 219 | if (!buffer_uptodate(bh)) { |
| 220 | get_bh(bh); |
| 221 | bh->b_end_io = end_buffer_read_sync; |
| 222 | submit_bh(READ, bh); |
| 223 | } else { |
| 224 | unlock_buffer(bh); |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 225 | ret = 1; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 226 | } |
| 227 | done: |
| 228 | brelse(bh); |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 229 | return ret; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 230 | } |
| 231 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 232 | struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr) |
| 233 | { |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 234 | struct buffer_head *bh = NULL; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 235 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 236 | bh = btrfs_find_create_tree_block(root, blocknr); |
| 237 | if (!bh) |
| 238 | return bh; |
Chris Mason | 9d64272 | 2007-04-03 11:43:19 -0400 | [diff] [blame] | 239 | if (buffer_uptodate(bh)) |
| 240 | goto uptodate; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 241 | lock_buffer(bh); |
| 242 | if (!buffer_uptodate(bh)) { |
| 243 | get_bh(bh); |
| 244 | bh->b_end_io = end_buffer_read_sync; |
| 245 | submit_bh(READ, bh); |
| 246 | wait_on_buffer(bh); |
| 247 | if (!buffer_uptodate(bh)) |
| 248 | goto fail; |
| 249 | } else { |
| 250 | unlock_buffer(bh); |
| 251 | } |
Chris Mason | 9d64272 | 2007-04-03 11:43:19 -0400 | [diff] [blame] | 252 | uptodate: |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 253 | if (!buffer_checked(bh)) { |
| 254 | csum_tree_block(root, bh, 1); |
| 255 | set_buffer_checked(bh); |
| 256 | } |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 257 | if (check_tree_block(root, bh)) |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 258 | goto fail; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 259 | return bh; |
| 260 | fail: |
| 261 | brelse(bh); |
| 262 | return NULL; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 263 | } |
| 264 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 265 | 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] | 266 | struct buffer_head *buf) |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 267 | { |
Chris Mason | d602557 | 2007-03-30 14:27:56 -0400 | [diff] [blame] | 268 | WARN_ON(atomic_read(&buf->b_count) == 0); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 269 | mark_buffer_dirty(buf); |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 270 | return 0; |
| 271 | } |
| 272 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 273 | 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] | 274 | struct buffer_head *buf) |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 275 | { |
Chris Mason | d602557 | 2007-03-30 14:27:56 -0400 | [diff] [blame] | 276 | WARN_ON(atomic_read(&buf->b_count) == 0); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 277 | clear_buffer_dirty(buf); |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 278 | return 0; |
| 279 | } |
| 280 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 281 | static int __setup_root(int blocksize, |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 282 | struct btrfs_root *root, |
| 283 | struct btrfs_fs_info *fs_info, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 284 | u64 objectid) |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 285 | { |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 286 | root->node = NULL; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 287 | root->inode = NULL; |
Chris Mason | a28ec19 | 2007-03-06 20:08:01 -0500 | [diff] [blame] | 288 | root->commit_root = NULL; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 289 | root->blocksize = blocksize; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 290 | root->ref_cows = 0; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 291 | root->fs_info = fs_info; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 292 | root->objectid = objectid; |
| 293 | root->last_trans = 0; |
Chris Mason | 1b05da2 | 2007-04-10 12:13:09 -0400 | [diff] [blame] | 294 | root->highest_inode = 0; |
| 295 | root->last_inode_alloc = 0; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 296 | memset(&root->root_key, 0, sizeof(root->root_key)); |
| 297 | memset(&root->root_item, 0, sizeof(root->root_item)); |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 298 | root->root_key.objectid = objectid; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 299 | return 0; |
| 300 | } |
| 301 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 302 | static int find_and_setup_root(int blocksize, |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 303 | struct btrfs_root *tree_root, |
| 304 | struct btrfs_fs_info *fs_info, |
| 305 | u64 objectid, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 306 | struct btrfs_root *root) |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 307 | { |
| 308 | int ret; |
| 309 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 310 | __setup_root(blocksize, root, fs_info, objectid); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 311 | ret = btrfs_find_last_root(tree_root, objectid, |
| 312 | &root->root_item, &root->root_key); |
| 313 | BUG_ON(ret); |
| 314 | |
| 315 | root->node = read_tree_block(root, |
| 316 | btrfs_root_blocknr(&root->root_item)); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 317 | BUG_ON(!root->node); |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 318 | return 0; |
| 319 | } |
| 320 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 321 | struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info, |
| 322 | struct btrfs_key *location) |
| 323 | { |
| 324 | struct btrfs_root *root; |
| 325 | struct btrfs_root *tree_root = fs_info->tree_root; |
| 326 | struct btrfs_path *path; |
| 327 | struct btrfs_leaf *l; |
Chris Mason | 1b05da2 | 2007-04-10 12:13:09 -0400 | [diff] [blame] | 328 | u64 highest_inode; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 329 | int ret = 0; |
| 330 | |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 331 | root = radix_tree_lookup(&fs_info->fs_roots_radix, |
| 332 | (unsigned long)location->objectid); |
Chris Mason | 0cf6c62 | 2007-06-09 09:22:25 -0400 | [diff] [blame] | 333 | if (root) |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 334 | return root; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 335 | root = kmalloc(sizeof(*root), GFP_NOFS); |
Chris Mason | 0cf6c62 | 2007-06-09 09:22:25 -0400 | [diff] [blame] | 336 | if (!root) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 337 | return ERR_PTR(-ENOMEM); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 338 | if (location->offset == (u64)-1) { |
| 339 | ret = find_and_setup_root(fs_info->sb->s_blocksize, |
| 340 | fs_info->tree_root, fs_info, |
| 341 | location->objectid, root); |
| 342 | if (ret) { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 343 | kfree(root); |
| 344 | return ERR_PTR(ret); |
| 345 | } |
| 346 | goto insert; |
| 347 | } |
| 348 | |
| 349 | __setup_root(fs_info->sb->s_blocksize, root, fs_info, |
| 350 | location->objectid); |
| 351 | |
| 352 | path = btrfs_alloc_path(); |
| 353 | BUG_ON(!path); |
| 354 | ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); |
| 355 | if (ret != 0) { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 356 | if (ret > 0) |
| 357 | ret = -ENOENT; |
| 358 | goto out; |
| 359 | } |
| 360 | l = btrfs_buffer_leaf(path->nodes[0]); |
| 361 | memcpy(&root->root_item, |
| 362 | btrfs_item_ptr(l, path->slots[0], struct btrfs_root_item), |
| 363 | sizeof(root->root_item)); |
| 364 | memcpy(&root->root_key, location, sizeof(*location)); |
| 365 | ret = 0; |
| 366 | out: |
| 367 | btrfs_release_path(root, path); |
| 368 | btrfs_free_path(path); |
| 369 | if (ret) { |
| 370 | kfree(root); |
| 371 | return ERR_PTR(ret); |
| 372 | } |
| 373 | root->node = read_tree_block(root, |
| 374 | btrfs_root_blocknr(&root->root_item)); |
| 375 | BUG_ON(!root->node); |
| 376 | insert: |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 377 | root->ref_cows = 1; |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 378 | ret = radix_tree_insert(&fs_info->fs_roots_radix, |
| 379 | (unsigned long)root->root_key.objectid, |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 380 | root); |
| 381 | if (ret) { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 382 | brelse(root->node); |
| 383 | kfree(root); |
| 384 | return ERR_PTR(ret); |
| 385 | } |
Chris Mason | 1b05da2 | 2007-04-10 12:13:09 -0400 | [diff] [blame] | 386 | ret = btrfs_find_highest_inode(root, &highest_inode); |
| 387 | if (ret == 0) { |
| 388 | root->highest_inode = highest_inode; |
| 389 | root->last_inode_alloc = highest_inode; |
Chris Mason | 1b05da2 | 2007-04-10 12:13:09 -0400 | [diff] [blame] | 390 | } |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 391 | return root; |
| 392 | } |
| 393 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 394 | struct btrfs_root *open_ctree(struct super_block *sb) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 395 | { |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 396 | struct btrfs_root *extent_root = kmalloc(sizeof(struct btrfs_root), |
| 397 | GFP_NOFS); |
| 398 | struct btrfs_root *tree_root = kmalloc(sizeof(struct btrfs_root), |
| 399 | GFP_NOFS); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 400 | struct btrfs_fs_info *fs_info = kmalloc(sizeof(*fs_info), |
| 401 | GFP_NOFS); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 402 | int ret; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 403 | int err = -EIO; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 404 | struct btrfs_super_block *disk_super; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 405 | |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 406 | if (!extent_root || !tree_root || !fs_info) { |
| 407 | err = -ENOMEM; |
| 408 | goto fail; |
| 409 | } |
Chris Mason | 8ef9762 | 2007-03-26 10:15:30 -0400 | [diff] [blame] | 410 | init_bit_radix(&fs_info->pinned_radix); |
| 411 | init_bit_radix(&fs_info->pending_del_radix); |
Chris Mason | e37c9e6 | 2007-05-09 20:13:14 -0400 | [diff] [blame] | 412 | init_bit_radix(&fs_info->extent_map_radix); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 413 | INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_NOFS); |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 414 | INIT_RADIX_TREE(&fs_info->block_group_radix, GFP_KERNEL); |
Chris Mason | be74417 | 2007-05-06 10:15:01 -0400 | [diff] [blame] | 415 | INIT_RADIX_TREE(&fs_info->block_group_data_radix, GFP_KERNEL); |
Chris Mason | 8fd1779 | 2007-04-19 21:01:03 -0400 | [diff] [blame] | 416 | INIT_LIST_HEAD(&fs_info->trans_list); |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 417 | INIT_LIST_HEAD(&fs_info->dead_roots); |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 418 | sb_set_blocksize(sb, 4096); |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 419 | fs_info->running_transaction = NULL; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 420 | fs_info->tree_root = tree_root; |
| 421 | fs_info->extent_root = extent_root; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 422 | fs_info->sb = sb; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 423 | fs_info->btree_inode = new_inode(sb); |
| 424 | fs_info->btree_inode->i_ino = 1; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 425 | fs_info->btree_inode->i_nlink = 1; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 426 | fs_info->btree_inode->i_size = sb->s_bdev->bd_inode->i_size; |
| 427 | fs_info->btree_inode->i_mapping->a_ops = &btree_aops; |
Chris Mason | e66f709 | 2007-04-20 13:16:02 -0400 | [diff] [blame] | 428 | fs_info->do_barriers = 1; |
Chris Mason | f2458e1 | 2007-04-25 15:52:25 -0400 | [diff] [blame] | 429 | fs_info->extent_tree_insert_nr = 0; |
| 430 | fs_info->extent_tree_prealloc_nr = 0; |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 431 | fs_info->closing = 0; |
| 432 | |
Chris Mason | 08607c1 | 2007-06-08 15:33:54 -0400 | [diff] [blame] | 433 | INIT_DELAYED_WORK(&fs_info->trans_work, btrfs_transaction_cleaner); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 434 | BTRFS_I(fs_info->btree_inode)->root = tree_root; |
| 435 | memset(&BTRFS_I(fs_info->btree_inode)->location, 0, |
| 436 | sizeof(struct btrfs_key)); |
Chris Mason | 22b0ebd | 2007-03-30 08:47:31 -0400 | [diff] [blame] | 437 | insert_inode_hash(fs_info->btree_inode); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 438 | mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 439 | fs_info->hash_tfm = crypto_alloc_hash("crc32c", 0, CRYPTO_ALG_ASYNC); |
Chris Mason | 30ae846 | 2007-03-29 09:59:15 -0400 | [diff] [blame] | 440 | spin_lock_init(&fs_info->hash_lock); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 441 | |
Chris Mason | 30ae846 | 2007-03-29 09:59:15 -0400 | [diff] [blame] | 442 | if (!fs_info->hash_tfm || IS_ERR(fs_info->hash_tfm)) { |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 443 | printk("btrfs: failed hash setup, modprobe cryptomgr?\n"); |
| 444 | err = -ENOMEM; |
| 445 | goto fail_iput; |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 446 | } |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 447 | mutex_init(&fs_info->trans_mutex); |
Chris Mason | d561c02 | 2007-03-23 19:47:49 -0400 | [diff] [blame] | 448 | mutex_init(&fs_info->fs_mutex); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 449 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 450 | __setup_root(sb->s_blocksize, tree_root, |
| 451 | fs_info, BTRFS_ROOT_TREE_OBJECTID); |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 452 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 453 | fs_info->sb_buffer = read_tree_block(tree_root, |
| 454 | BTRFS_SUPER_INFO_OFFSET / |
| 455 | sb->s_blocksize); |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 456 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 457 | if (!fs_info->sb_buffer) |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 458 | goto fail_iput; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 459 | disk_super = (struct btrfs_super_block *)fs_info->sb_buffer->b_data; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 460 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 461 | if (!btrfs_super_root(disk_super)) |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 462 | goto fail_sb_buffer; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 463 | |
Chris Mason | 8352d8a | 2007-04-12 10:43:05 -0400 | [diff] [blame] | 464 | i_size_write(fs_info->btree_inode, |
| 465 | btrfs_super_total_blocks(disk_super) << |
| 466 | fs_info->btree_inode->i_blkbits); |
| 467 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 468 | fs_info->disk_super = disk_super; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 469 | |
| 470 | if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC, |
| 471 | sizeof(disk_super->magic))) { |
| 472 | printk("btrfs: valid FS not found on %s\n", sb->s_id); |
| 473 | goto fail_sb_buffer; |
| 474 | } |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 475 | tree_root->node = read_tree_block(tree_root, |
| 476 | btrfs_super_root(disk_super)); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 477 | if (!tree_root->node) |
| 478 | goto fail_sb_buffer; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 479 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 480 | mutex_lock(&fs_info->fs_mutex); |
| 481 | ret = find_and_setup_root(sb->s_blocksize, tree_root, fs_info, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 482 | BTRFS_EXTENT_TREE_OBJECTID, extent_root); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 483 | if (ret) { |
| 484 | mutex_unlock(&fs_info->fs_mutex); |
| 485 | goto fail_tree_root; |
| 486 | } |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 487 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 488 | btrfs_read_block_groups(extent_root); |
| 489 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 490 | fs_info->generation = btrfs_super_generation(disk_super) + 1; |
Chris Mason | 5be6f7f | 2007-04-05 13:35:25 -0400 | [diff] [blame] | 491 | mutex_unlock(&fs_info->fs_mutex); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 492 | return tree_root; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 493 | |
| 494 | fail_tree_root: |
| 495 | btrfs_block_release(tree_root, tree_root->node); |
| 496 | fail_sb_buffer: |
| 497 | btrfs_block_release(tree_root, fs_info->sb_buffer); |
| 498 | fail_iput: |
| 499 | iput(fs_info->btree_inode); |
| 500 | fail: |
| 501 | kfree(extent_root); |
| 502 | kfree(tree_root); |
| 503 | kfree(fs_info); |
| 504 | return ERR_PTR(err); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 505 | } |
| 506 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 507 | int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 508 | *root) |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 509 | { |
Chris Mason | e66f709 | 2007-04-20 13:16:02 -0400 | [diff] [blame] | 510 | int ret; |
Chris Mason | d571976 | 2007-03-23 10:01:08 -0400 | [diff] [blame] | 511 | struct buffer_head *bh = root->fs_info->sb_buffer; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 512 | |
Chris Mason | d571976 | 2007-03-23 10:01:08 -0400 | [diff] [blame] | 513 | btrfs_set_super_root(root->fs_info->disk_super, |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 514 | bh_blocknr(root->fs_info->tree_root->node)); |
Chris Mason | d571976 | 2007-03-23 10:01:08 -0400 | [diff] [blame] | 515 | lock_buffer(bh); |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 516 | WARN_ON(atomic_read(&bh->b_count) < 1); |
Chris Mason | d571976 | 2007-03-23 10:01:08 -0400 | [diff] [blame] | 517 | clear_buffer_dirty(bh); |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 518 | csum_tree_block(root, bh, 0); |
Chris Mason | d571976 | 2007-03-23 10:01:08 -0400 | [diff] [blame] | 519 | bh->b_end_io = end_buffer_write_sync; |
| 520 | get_bh(bh); |
Chris Mason | e66f709 | 2007-04-20 13:16:02 -0400 | [diff] [blame] | 521 | if (root->fs_info->do_barriers) |
| 522 | ret = submit_bh(WRITE_BARRIER, bh); |
| 523 | else |
| 524 | ret = submit_bh(WRITE, bh); |
| 525 | if (ret == -EOPNOTSUPP) { |
| 526 | set_buffer_uptodate(bh); |
| 527 | root->fs_info->do_barriers = 0; |
| 528 | ret = submit_bh(WRITE, bh); |
| 529 | } |
Chris Mason | d571976 | 2007-03-23 10:01:08 -0400 | [diff] [blame] | 530 | wait_on_buffer(bh); |
| 531 | if (!buffer_uptodate(bh)) { |
| 532 | WARN_ON(1); |
| 533 | return -EIO; |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 534 | } |
| 535 | return 0; |
| 536 | } |
| 537 | |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 538 | static int free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) |
| 539 | { |
| 540 | radix_tree_delete(&fs_info->fs_roots_radix, |
| 541 | (unsigned long)root->root_key.objectid); |
| 542 | if (root->inode) |
| 543 | iput(root->inode); |
| 544 | if (root->node) |
| 545 | brelse(root->node); |
| 546 | if (root->commit_root) |
| 547 | brelse(root->commit_root); |
| 548 | kfree(root); |
| 549 | return 0; |
| 550 | } |
| 551 | |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 552 | static int del_fs_roots(struct btrfs_fs_info *fs_info) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 553 | { |
| 554 | int ret; |
| 555 | struct btrfs_root *gang[8]; |
| 556 | int i; |
| 557 | |
| 558 | while(1) { |
| 559 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
| 560 | (void **)gang, 0, |
| 561 | ARRAY_SIZE(gang)); |
| 562 | if (!ret) |
| 563 | break; |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 564 | for (i = 0; i < ret; i++) |
| 565 | free_fs_root(fs_info, gang[i]); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 566 | } |
| 567 | return 0; |
| 568 | } |
Chris Mason | b4100d6 | 2007-04-12 12:14:00 -0400 | [diff] [blame] | 569 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 570 | int close_ctree(struct btrfs_root *root) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 571 | { |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 572 | int ret; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 573 | struct btrfs_trans_handle *trans; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 574 | struct btrfs_fs_info *fs_info = root->fs_info; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 575 | |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 576 | fs_info->closing = 1; |
Chris Mason | 08607c1 | 2007-06-08 15:33:54 -0400 | [diff] [blame] | 577 | btrfs_transaction_flush_work(root); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 578 | mutex_lock(&fs_info->fs_mutex); |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 579 | trans = btrfs_start_transaction(root, 1); |
| 580 | btrfs_commit_transaction(trans, root); |
| 581 | /* run commit again to drop the original snapshot */ |
| 582 | trans = btrfs_start_transaction(root, 1); |
| 583 | btrfs_commit_transaction(trans, root); |
| 584 | ret = btrfs_write_and_wait_transaction(NULL, root); |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 585 | BUG_ON(ret); |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 586 | write_ctree_super(NULL, root); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 587 | mutex_unlock(&fs_info->fs_mutex); |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 588 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 589 | if (fs_info->extent_root->node) |
| 590 | btrfs_block_release(fs_info->extent_root, |
| 591 | fs_info->extent_root->node); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 592 | if (fs_info->tree_root->node) |
| 593 | btrfs_block_release(fs_info->tree_root, |
| 594 | fs_info->tree_root->node); |
| 595 | btrfs_block_release(root, fs_info->sb_buffer); |
| 596 | crypto_free_hash(fs_info->hash_tfm); |
| 597 | truncate_inode_pages(fs_info->btree_inode->i_mapping, 0); |
| 598 | iput(fs_info->btree_inode); |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 599 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 600 | btrfs_free_block_groups(root->fs_info); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 601 | del_fs_roots(fs_info); |
| 602 | kfree(fs_info->extent_root); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 603 | kfree(fs_info->tree_root); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 604 | return 0; |
| 605 | } |
| 606 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 607 | void btrfs_block_release(struct btrfs_root *root, struct buffer_head *buf) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 608 | { |
Chris Mason | 7cfcc17 | 2007-04-02 14:53:59 -0400 | [diff] [blame] | 609 | brelse(buf); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 610 | } |
| 611 | |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 612 | void btrfs_btree_balance_dirty(struct btrfs_root *root) |
| 613 | { |
| 614 | balance_dirty_pages_ratelimited(root->fs_info->btree_inode->i_mapping); |
| 615 | } |