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-rw-r--r--fs/btrfs/ctree.c228
-rw-r--r--fs/btrfs/ctree.h62
-rw-r--r--fs/btrfs/disk-io.c4
-rw-r--r--fs/btrfs/extent-tree.c1143
-rw-r--r--fs/btrfs/extent_io.c3
-rw-r--r--fs/btrfs/file.c121
-rw-r--r--fs/btrfs/inode.c57
-rw-r--r--fs/btrfs/ioctl.c57
-rw-r--r--fs/btrfs/print-tree.c5
-rw-r--r--fs/btrfs/tree-log.c108
10 files changed, 1066 insertions, 722 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 6f467901246f..50aea8cb653a 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -125,7 +125,6 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans,
125 u32 nritems; 125 u32 nritems;
126 int ret = 0; 126 int ret = 0;
127 int level; 127 int level;
128 struct btrfs_key first_key;
129 struct btrfs_root *new_root; 128 struct btrfs_root *new_root;
130 129
131 new_root = kmalloc(sizeof(*new_root), GFP_NOFS); 130 new_root = kmalloc(sizeof(*new_root), GFP_NOFS);
@@ -141,18 +140,10 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans,
141 140
142 level = btrfs_header_level(buf); 141 level = btrfs_header_level(buf);
143 nritems = btrfs_header_nritems(buf); 142 nritems = btrfs_header_nritems(buf);
144 if (nritems) { 143
145 if (level == 0) 144 cow = btrfs_alloc_free_block(trans, new_root, buf->len, 0,
146 btrfs_item_key_to_cpu(buf, &first_key, 0); 145 new_root_objectid, trans->transid,
147 else 146 level, buf->start, 0);
148 btrfs_node_key_to_cpu(buf, &first_key, 0);
149 } else {
150 first_key.objectid = 0;
151 }
152 cow = btrfs_alloc_free_block(trans, new_root, buf->len,
153 new_root_objectid,
154 trans->transid, first_key.objectid,
155 level, buf->start, 0);
156 if (IS_ERR(cow)) { 147 if (IS_ERR(cow)) {
157 kfree(new_root); 148 kfree(new_root);
158 return PTR_ERR(cow); 149 return PTR_ERR(cow);
@@ -165,7 +156,7 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans,
165 btrfs_clear_header_flag(cow, BTRFS_HEADER_FLAG_WRITTEN); 156 btrfs_clear_header_flag(cow, BTRFS_HEADER_FLAG_WRITTEN);
166 157
167 WARN_ON(btrfs_header_generation(buf) > trans->transid); 158 WARN_ON(btrfs_header_generation(buf) > trans->transid);
168 ret = btrfs_inc_ref(trans, new_root, buf, 0); 159 ret = btrfs_inc_ref(trans, new_root, buf, cow, NULL);
169 kfree(new_root); 160 kfree(new_root);
170 161
171 if (ret) 162 if (ret)
@@ -184,39 +175,31 @@ int noinline __btrfs_cow_block(struct btrfs_trans_handle *trans,
184 u64 search_start, u64 empty_size, 175 u64 search_start, u64 empty_size,
185 u64 prealloc_dest) 176 u64 prealloc_dest)
186{ 177{
187 u64 root_gen; 178 u64 parent_start;
188 struct extent_buffer *cow; 179 struct extent_buffer *cow;
189 u32 nritems; 180 u32 nritems;
190 int ret = 0; 181 int ret = 0;
191 int different_trans = 0; 182 int different_trans = 0;
192 int level; 183 int level;
193 int unlock_orig = 0; 184 int unlock_orig = 0;
194 struct btrfs_key first_key;
195 185
196 if (*cow_ret == buf) 186 if (*cow_ret == buf)
197 unlock_orig = 1; 187 unlock_orig = 1;
198 188
199 WARN_ON(!btrfs_tree_locked(buf)); 189 WARN_ON(!btrfs_tree_locked(buf));
200 190
201 if (root->ref_cows) { 191 if (parent)
202 root_gen = trans->transid; 192 parent_start = parent->start;
203 } else { 193 else
204 root_gen = 0; 194 parent_start = 0;
205 } 195
206 WARN_ON(root->ref_cows && trans->transid != 196 WARN_ON(root->ref_cows && trans->transid !=
207 root->fs_info->running_transaction->transid); 197 root->fs_info->running_transaction->transid);
208 WARN_ON(root->ref_cows && trans->transid != root->last_trans); 198 WARN_ON(root->ref_cows && trans->transid != root->last_trans);
209 199
210 level = btrfs_header_level(buf); 200 level = btrfs_header_level(buf);
211 nritems = btrfs_header_nritems(buf); 201 nritems = btrfs_header_nritems(buf);
212 if (nritems) { 202
213 if (level == 0)
214 btrfs_item_key_to_cpu(buf, &first_key, 0);
215 else
216 btrfs_node_key_to_cpu(buf, &first_key, 0);
217 } else {
218 first_key.objectid = 0;
219 }
220 if (prealloc_dest) { 203 if (prealloc_dest) {
221 struct btrfs_key ins; 204 struct btrfs_key ins;
222 205
@@ -224,19 +207,19 @@ int noinline __btrfs_cow_block(struct btrfs_trans_handle *trans,
224 ins.offset = buf->len; 207 ins.offset = buf->len;
225 ins.type = BTRFS_EXTENT_ITEM_KEY; 208 ins.type = BTRFS_EXTENT_ITEM_KEY;
226 209
227 ret = btrfs_alloc_reserved_extent(trans, root, 210 ret = btrfs_alloc_reserved_extent(trans, root, parent_start,
228 root->root_key.objectid, 211 root->root_key.objectid,
229 root_gen, level, 212 trans->transid, level, 0,
230 first_key.objectid,
231 &ins); 213 &ins);
232 BUG_ON(ret); 214 BUG_ON(ret);
233 cow = btrfs_init_new_buffer(trans, root, prealloc_dest, 215 cow = btrfs_init_new_buffer(trans, root, prealloc_dest,
234 buf->len); 216 buf->len);
235 } else { 217 } else {
236 cow = btrfs_alloc_free_block(trans, root, buf->len, 218 cow = btrfs_alloc_free_block(trans, root, buf->len,
219 parent_start,
237 root->root_key.objectid, 220 root->root_key.objectid,
238 root_gen, first_key.objectid, 221 trans->transid, level,
239 level, search_start, empty_size); 222 search_start, empty_size);
240 } 223 }
241 if (IS_ERR(cow)) 224 if (IS_ERR(cow))
242 return PTR_ERR(cow); 225 return PTR_ERR(cow);
@@ -249,17 +232,23 @@ int noinline __btrfs_cow_block(struct btrfs_trans_handle *trans,
249 232
250 WARN_ON(btrfs_header_generation(buf) > trans->transid); 233 WARN_ON(btrfs_header_generation(buf) > trans->transid);
251 if (btrfs_header_generation(buf) != trans->transid) { 234 if (btrfs_header_generation(buf) != trans->transid) {
235 u32 nr_extents;
252 different_trans = 1; 236 different_trans = 1;
253 ret = btrfs_inc_ref(trans, root, buf, 1); 237 ret = btrfs_inc_ref(trans, root, buf, cow, &nr_extents);
254 if (ret) 238 if (ret)
255 return ret; 239 return ret;
240
241 ret = btrfs_cache_ref(trans, root, buf, nr_extents);
242 WARN_ON(ret);
256 } else { 243 } else {
244 ret = btrfs_update_ref(trans, root, buf, cow, 0, nritems);
245 if (ret)
246 return ret;
257 clean_tree_block(trans, root, buf); 247 clean_tree_block(trans, root, buf);
258 } 248 }
259 249
260 if (buf == root->node) { 250 if (buf == root->node) {
261 WARN_ON(parent && parent != buf); 251 WARN_ON(parent && parent != buf);
262 root_gen = btrfs_header_generation(buf);
263 252
264 spin_lock(&root->node_lock); 253 spin_lock(&root->node_lock);
265 root->node = cow; 254 root->node = cow;
@@ -268,13 +257,14 @@ int noinline __btrfs_cow_block(struct btrfs_trans_handle *trans,
268 257
269 if (buf != root->commit_root) { 258 if (buf != root->commit_root) {
270 btrfs_free_extent(trans, root, buf->start, 259 btrfs_free_extent(trans, root, buf->start,
271 buf->len, root->root_key.objectid, 260 buf->len, buf->start,
272 root_gen, 0, 0, 1); 261 root->root_key.objectid,
262 btrfs_header_generation(buf),
263 0, 0, 1);
273 } 264 }
274 free_extent_buffer(buf); 265 free_extent_buffer(buf);
275 add_root_to_dirty_list(root); 266 add_root_to_dirty_list(root);
276 } else { 267 } else {
277 root_gen = btrfs_header_generation(parent);
278 btrfs_set_node_blockptr(parent, parent_slot, 268 btrfs_set_node_blockptr(parent, parent_slot,
279 cow->start); 269 cow->start);
280 WARN_ON(trans->transid == 0); 270 WARN_ON(trans->transid == 0);
@@ -283,8 +273,8 @@ int noinline __btrfs_cow_block(struct btrfs_trans_handle *trans,
283 btrfs_mark_buffer_dirty(parent); 273 btrfs_mark_buffer_dirty(parent);
284 WARN_ON(btrfs_header_generation(parent) != trans->transid); 274 WARN_ON(btrfs_header_generation(parent) != trans->transid);
285 btrfs_free_extent(trans, root, buf->start, buf->len, 275 btrfs_free_extent(trans, root, buf->start, buf->len,
286 btrfs_header_owner(parent), root_gen, 276 parent_start, btrfs_header_owner(parent),
287 0, 0, 1); 277 btrfs_header_generation(parent), 0, 0, 1);
288 } 278 }
289 if (unlock_orig) 279 if (unlock_orig)
290 btrfs_tree_unlock(buf); 280 btrfs_tree_unlock(buf);
@@ -831,6 +821,12 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
831 root->node = child; 821 root->node = child;
832 spin_unlock(&root->node_lock); 822 spin_unlock(&root->node_lock);
833 823
824 ret = btrfs_update_extent_ref(trans, root, child->start,
825 mid->start, child->start,
826 root->root_key.objectid,
827 trans->transid, level - 1, 0);
828 BUG_ON(ret);
829
834 add_root_to_dirty_list(root); 830 add_root_to_dirty_list(root);
835 btrfs_tree_unlock(child); 831 btrfs_tree_unlock(child);
836 path->locks[level] = 0; 832 path->locks[level] = 0;
@@ -840,7 +836,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
840 /* once for the path */ 836 /* once for the path */
841 free_extent_buffer(mid); 837 free_extent_buffer(mid);
842 ret = btrfs_free_extent(trans, root, mid->start, mid->len, 838 ret = btrfs_free_extent(trans, root, mid->start, mid->len,
843 root->root_key.objectid, 839 mid->start, root->root_key.objectid,
844 btrfs_header_generation(mid), 0, 0, 1); 840 btrfs_header_generation(mid), 0, 0, 1);
845 /* once for the root ptr */ 841 /* once for the root ptr */
846 free_extent_buffer(mid); 842 free_extent_buffer(mid);
@@ -905,7 +901,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
905 if (wret) 901 if (wret)
906 ret = wret; 902 ret = wret;
907 wret = btrfs_free_extent(trans, root, bytenr, 903 wret = btrfs_free_extent(trans, root, bytenr,
908 blocksize, 904 blocksize, parent->start,
909 btrfs_header_owner(parent), 905 btrfs_header_owner(parent),
910 generation, 0, 0, 1); 906 generation, 0, 0, 1);
911 if (wret) 907 if (wret)
@@ -954,6 +950,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
954 if (wret) 950 if (wret)
955 ret = wret; 951 ret = wret;
956 wret = btrfs_free_extent(trans, root, bytenr, blocksize, 952 wret = btrfs_free_extent(trans, root, bytenr, blocksize,
953 parent->start,
957 btrfs_header_owner(parent), 954 btrfs_header_owner(parent),
958 root_gen, 0, 0, 1); 955 root_gen, 0, 0, 1);
959 if (wret) 956 if (wret)
@@ -1500,6 +1497,41 @@ static int fixup_low_keys(struct btrfs_trans_handle *trans,
1500} 1497}
1501 1498
1502/* 1499/*
1500 * update item key.
1501 *
1502 * This function isn't completely safe. It's the caller's responsibility
1503 * that the new key won't break the order
1504 */
1505int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1506 struct btrfs_root *root, struct btrfs_path *path,
1507 struct btrfs_key *new_key)
1508{
1509 struct btrfs_disk_key disk_key;
1510 struct extent_buffer *eb;
1511 int slot;
1512
1513 eb = path->nodes[0];
1514 slot = path->slots[0];
1515 if (slot > 0) {
1516 btrfs_item_key(eb, &disk_key, slot - 1);
1517 if (comp_keys(&disk_key, new_key) >= 0)
1518 return -1;
1519 }
1520 if (slot < btrfs_header_nritems(eb) - 1) {
1521 btrfs_item_key(eb, &disk_key, slot + 1);
1522 if (comp_keys(&disk_key, new_key) <= 0)
1523 return -1;
1524 }
1525
1526 btrfs_cpu_key_to_disk(&disk_key, new_key);
1527 btrfs_set_item_key(eb, &disk_key, slot);
1528 btrfs_mark_buffer_dirty(eb);
1529 if (slot == 0)
1530 fixup_low_keys(trans, root, path, &disk_key, 1);
1531 return 0;
1532}
1533
1534/*
1503 * try to push data from one node into the next node left in the 1535 * try to push data from one node into the next node left in the
1504 * tree. 1536 * tree.
1505 * 1537 *
@@ -1558,6 +1590,10 @@ static int push_node_left(struct btrfs_trans_handle *trans,
1558 btrfs_set_header_nritems(dst, dst_nritems + push_items); 1590 btrfs_set_header_nritems(dst, dst_nritems + push_items);
1559 btrfs_mark_buffer_dirty(src); 1591 btrfs_mark_buffer_dirty(src);
1560 btrfs_mark_buffer_dirty(dst); 1592 btrfs_mark_buffer_dirty(dst);
1593
1594 ret = btrfs_update_ref(trans, root, src, dst, dst_nritems, push_items);
1595 BUG_ON(ret);
1596
1561 return ret; 1597 return ret;
1562} 1598}
1563 1599
@@ -1619,6 +1655,10 @@ static int balance_node_right(struct btrfs_trans_handle *trans,
1619 1655
1620 btrfs_mark_buffer_dirty(src); 1656 btrfs_mark_buffer_dirty(src);
1621 btrfs_mark_buffer_dirty(dst); 1657 btrfs_mark_buffer_dirty(dst);
1658
1659 ret = btrfs_update_ref(trans, root, src, dst, 0, push_items);
1660 BUG_ON(ret);
1661
1622 return ret; 1662 return ret;
1623} 1663}
1624 1664
@@ -1633,30 +1673,24 @@ static int noinline insert_new_root(struct btrfs_trans_handle *trans,
1633 struct btrfs_root *root, 1673 struct btrfs_root *root,
1634 struct btrfs_path *path, int level) 1674 struct btrfs_path *path, int level)
1635{ 1675{
1636 u64 root_gen;
1637 u64 lower_gen; 1676 u64 lower_gen;
1638 struct extent_buffer *lower; 1677 struct extent_buffer *lower;
1639 struct extent_buffer *c; 1678 struct extent_buffer *c;
1640 struct extent_buffer *old; 1679 struct extent_buffer *old;
1641 struct btrfs_disk_key lower_key; 1680 struct btrfs_disk_key lower_key;
1681 int ret;
1642 1682
1643 BUG_ON(path->nodes[level]); 1683 BUG_ON(path->nodes[level]);
1644 BUG_ON(path->nodes[level-1] != root->node); 1684 BUG_ON(path->nodes[level-1] != root->node);
1645 1685
1646 if (root->ref_cows)
1647 root_gen = trans->transid;
1648 else
1649 root_gen = 0;
1650
1651 lower = path->nodes[level-1]; 1686 lower = path->nodes[level-1];
1652 if (level == 1) 1687 if (level == 1)
1653 btrfs_item_key(lower, &lower_key, 0); 1688 btrfs_item_key(lower, &lower_key, 0);
1654 else 1689 else
1655 btrfs_node_key(lower, &lower_key, 0); 1690 btrfs_node_key(lower, &lower_key, 0);
1656 1691
1657 c = btrfs_alloc_free_block(trans, root, root->nodesize, 1692 c = btrfs_alloc_free_block(trans, root, root->nodesize, 0,
1658 root->root_key.objectid, 1693 root->root_key.objectid, trans->transid,
1659 root_gen, le64_to_cpu(lower_key.objectid),
1660 level, root->node->start, 0); 1694 level, root->node->start, 0);
1661 if (IS_ERR(c)) 1695 if (IS_ERR(c))
1662 return PTR_ERR(c); 1696 return PTR_ERR(c);
@@ -1679,7 +1713,7 @@ static int noinline insert_new_root(struct btrfs_trans_handle *trans,
1679 btrfs_set_node_key(c, &lower_key, 0); 1713 btrfs_set_node_key(c, &lower_key, 0);
1680 btrfs_set_node_blockptr(c, 0, lower->start); 1714 btrfs_set_node_blockptr(c, 0, lower->start);
1681 lower_gen = btrfs_header_generation(lower); 1715 lower_gen = btrfs_header_generation(lower);
1682 WARN_ON(lower_gen == 0); 1716 WARN_ON(lower_gen != trans->transid);
1683 1717
1684 btrfs_set_node_ptr_generation(c, 0, lower_gen); 1718 btrfs_set_node_ptr_generation(c, 0, lower_gen);
1685 1719
@@ -1690,6 +1724,12 @@ static int noinline insert_new_root(struct btrfs_trans_handle *trans,
1690 root->node = c; 1724 root->node = c;
1691 spin_unlock(&root->node_lock); 1725 spin_unlock(&root->node_lock);
1692 1726
1727 ret = btrfs_update_extent_ref(trans, root, lower->start,
1728 lower->start, c->start,
1729 root->root_key.objectid,
1730 trans->transid, level - 1, 0);
1731 BUG_ON(ret);
1732
1693 /* the super has an extra ref to root->node */ 1733 /* the super has an extra ref to root->node */
1694 free_extent_buffer(old); 1734 free_extent_buffer(old);
1695 1735
@@ -1698,20 +1738,6 @@ static int noinline insert_new_root(struct btrfs_trans_handle *trans,
1698 path->nodes[level] = c; 1738 path->nodes[level] = c;
1699 path->locks[level] = 1; 1739 path->locks[level] = 1;
1700 path->slots[level] = 0; 1740 path->slots[level] = 0;
1701
1702 if (root->ref_cows && lower_gen != trans->transid) {
1703 struct btrfs_path *back_path = btrfs_alloc_path();
1704 int ret;
1705 mutex_lock(&root->fs_info->alloc_mutex);
1706 ret = btrfs_insert_extent_backref(trans,
1707 root->fs_info->extent_root,
1708 path, lower->start,
1709 root->root_key.objectid,
1710 trans->transid, 0, 0);
1711 BUG_ON(ret);
1712 mutex_unlock(&root->fs_info->alloc_mutex);
1713 btrfs_free_path(back_path);
1714 }
1715 return 0; 1741 return 0;
1716} 1742}
1717 1743
@@ -1766,7 +1792,6 @@ static noinline int split_node(struct btrfs_trans_handle *trans,
1766 struct btrfs_root *root, 1792 struct btrfs_root *root,
1767 struct btrfs_path *path, int level) 1793 struct btrfs_path *path, int level)
1768{ 1794{
1769 u64 root_gen;
1770 struct extent_buffer *c; 1795 struct extent_buffer *c;
1771 struct extent_buffer *split; 1796 struct extent_buffer *split;
1772 struct btrfs_disk_key disk_key; 1797 struct btrfs_disk_key disk_key;
@@ -1793,17 +1818,11 @@ static noinline int split_node(struct btrfs_trans_handle *trans,
1793 } 1818 }
1794 1819
1795 c_nritems = btrfs_header_nritems(c); 1820 c_nritems = btrfs_header_nritems(c);
1796 if (root->ref_cows)
1797 root_gen = trans->transid;
1798 else
1799 root_gen = 0;
1800 1821
1801 btrfs_node_key(c, &disk_key, 0);
1802 split = btrfs_alloc_free_block(trans, root, root->nodesize, 1822 split = btrfs_alloc_free_block(trans, root, root->nodesize,
1803 root->root_key.objectid, 1823 path->nodes[level + 1]->start,
1804 root_gen, 1824 root->root_key.objectid,
1805 btrfs_disk_key_objectid(&disk_key), 1825 trans->transid, level, c->start, 0);
1806 level, c->start, 0);
1807 if (IS_ERR(split)) 1826 if (IS_ERR(split))
1808 return PTR_ERR(split); 1827 return PTR_ERR(split);
1809 1828
@@ -1840,6 +1859,9 @@ static noinline int split_node(struct btrfs_trans_handle *trans,
1840 if (wret) 1859 if (wret)
1841 ret = wret; 1860 ret = wret;
1842 1861
1862 ret = btrfs_update_ref(trans, root, c, split, 0, c_nritems - mid);
1863 BUG_ON(ret);
1864
1843 if (path->slots[level] >= mid) { 1865 if (path->slots[level] >= mid) {
1844 path->slots[level] -= mid; 1866 path->slots[level] -= mid;
1845 btrfs_tree_unlock(c); 1867 btrfs_tree_unlock(c);
@@ -1955,10 +1977,23 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
1955 else 1977 else
1956 nr = 1; 1978 nr = 1;
1957 1979
1980 if (path->slots[0] >= left_nritems)
1981 push_space += data_size + sizeof(*item);
1982
1958 i = left_nritems - 1; 1983 i = left_nritems - 1;
1959 while (i >= nr) { 1984 while (i >= nr) {
1960 item = btrfs_item_nr(left, i); 1985 item = btrfs_item_nr(left, i);
1961 1986
1987 if (!empty && push_items > 0) {
1988 if (path->slots[0] > i)
1989 break;
1990 if (path->slots[0] == i) {
1991 int space = btrfs_leaf_free_space(root, left);
1992 if (space + push_space * 2 > free_space)
1993 break;
1994 }
1995 }
1996
1962 if (path->slots[0] == i) 1997 if (path->slots[0] == i)
1963 push_space += data_size + sizeof(*item); 1998 push_space += data_size + sizeof(*item);
1964 1999
@@ -1973,6 +2008,7 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
1973 this_item_size = btrfs_item_size(left, item); 2008 this_item_size = btrfs_item_size(left, item);
1974 if (this_item_size + sizeof(*item) + push_space > free_space) 2009 if (this_item_size + sizeof(*item) + push_space > free_space)
1975 break; 2010 break;
2011
1976 push_items++; 2012 push_items++;
1977 push_space += this_item_size + sizeof(*item); 2013 push_space += this_item_size + sizeof(*item);
1978 if (i == 0) 2014 if (i == 0)
@@ -2046,6 +2082,9 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
2046 btrfs_mark_buffer_dirty(left); 2082 btrfs_mark_buffer_dirty(left);
2047 btrfs_mark_buffer_dirty(right); 2083 btrfs_mark_buffer_dirty(right);
2048 2084
2085 ret = btrfs_update_ref(trans, root, left, right, 0, push_items);
2086 BUG_ON(ret);
2087
2049 btrfs_item_key(right, &disk_key, 0); 2088 btrfs_item_key(right, &disk_key, 0);
2050 btrfs_set_node_key(upper, &disk_key, slot + 1); 2089 btrfs_set_node_key(upper, &disk_key, slot + 1);
2051 btrfs_mark_buffer_dirty(upper); 2090 btrfs_mark_buffer_dirty(upper);
@@ -2147,6 +2186,16 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
2147 KM_USER1); 2186 KM_USER1);
2148 } 2187 }
2149 2188
2189 if (!empty && push_items > 0) {
2190 if (path->slots[0] < i)
2191 break;
2192 if (path->slots[0] == i) {
2193 int space = btrfs_leaf_free_space(root, right);
2194 if (space + push_space * 2 > free_space)
2195 break;
2196 }
2197 }
2198
2150 if (path->slots[0] == i) 2199 if (path->slots[0] == i)
2151 push_space += data_size + sizeof(*item); 2200 push_space += data_size + sizeof(*item);
2152 2201
@@ -2255,6 +2304,10 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
2255 if (right_nritems) 2304 if (right_nritems)
2256 btrfs_mark_buffer_dirty(right); 2305 btrfs_mark_buffer_dirty(right);
2257 2306
2307 ret = btrfs_update_ref(trans, root, right, left,
2308 old_left_nritems, push_items);
2309 BUG_ON(ret);
2310
2258 btrfs_item_key(right, &disk_key, 0); 2311 btrfs_item_key(right, &disk_key, 0);
2259 wret = fixup_low_keys(trans, root, path, &disk_key, 1); 2312 wret = fixup_low_keys(trans, root, path, &disk_key, 1);
2260 if (wret) 2313 if (wret)
@@ -2294,7 +2347,6 @@ static noinline int split_leaf(struct btrfs_trans_handle *trans,
2294 struct btrfs_path *path, int data_size, 2347 struct btrfs_path *path, int data_size,
2295 int extend) 2348 int extend)
2296{ 2349{
2297 u64 root_gen;
2298 struct extent_buffer *l; 2350 struct extent_buffer *l;
2299 u32 nritems; 2351 u32 nritems;
2300 int mid; 2352 int mid;
@@ -2313,11 +2365,6 @@ static noinline int split_leaf(struct btrfs_trans_handle *trans,
2313 if (extend) 2365 if (extend)
2314 space_needed = data_size; 2366 space_needed = data_size;
2315 2367
2316 if (root->ref_cows)
2317 root_gen = trans->transid;
2318 else
2319 root_gen = 0;
2320
2321 /* first try to make some room by pushing left and right */ 2368 /* first try to make some room by pushing left and right */
2322 if (ins_key->type != BTRFS_DIR_ITEM_KEY) { 2369 if (ins_key->type != BTRFS_DIR_ITEM_KEY) {
2323 wret = push_leaf_right(trans, root, path, data_size, 0); 2370 wret = push_leaf_right(trans, root, path, data_size, 0);
@@ -2348,13 +2395,10 @@ again:
2348 nritems = btrfs_header_nritems(l); 2395 nritems = btrfs_header_nritems(l);
2349 mid = (nritems + 1)/ 2; 2396 mid = (nritems + 1)/ 2;
2350 2397
2351 btrfs_item_key(l, &disk_key, 0);
2352
2353 right = btrfs_alloc_free_block(trans, root, root->leafsize, 2398 right = btrfs_alloc_free_block(trans, root, root->leafsize,
2354 root->root_key.objectid, 2399 path->nodes[1]->start,
2355 root_gen, 2400 root->root_key.objectid,
2356 le64_to_cpu(disk_key.objectid), 2401 trans->transid, 0, l->start, 0);
2357 0, l->start, 0);
2358 if (IS_ERR(right)) { 2402 if (IS_ERR(right)) {
2359 BUG_ON(1); 2403 BUG_ON(1);
2360 return PTR_ERR(right); 2404 return PTR_ERR(right);
@@ -2485,6 +2529,9 @@ again:
2485 btrfs_mark_buffer_dirty(l); 2529 btrfs_mark_buffer_dirty(l);
2486 BUG_ON(path->slots[0] != slot); 2530 BUG_ON(path->slots[0] != slot);
2487 2531
2532 ret = btrfs_update_ref(trans, root, l, right, 0, nritems);
2533 BUG_ON(ret);
2534
2488 if (mid <= slot) { 2535 if (mid <= slot) {
2489 btrfs_tree_unlock(path->nodes[0]); 2536 btrfs_tree_unlock(path->nodes[0]);
2490 free_extent_buffer(path->nodes[0]); 2537 free_extent_buffer(path->nodes[0]);
@@ -2956,6 +3003,7 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2956 ret = wret; 3003 ret = wret;
2957 wret = btrfs_free_extent(trans, root, 3004 wret = btrfs_free_extent(trans, root,
2958 leaf->start, leaf->len, 3005 leaf->start, leaf->len,
3006 path->nodes[1]->start,
2959 btrfs_header_owner(path->nodes[1]), 3007 btrfs_header_owner(path->nodes[1]),
2960 root_gen, 0, 0, 1); 3008 root_gen, 0, 0, 1);
2961 if (wret) 3009 if (wret)
@@ -3007,7 +3055,7 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3007 3055
3008 free_extent_buffer(leaf); 3056 free_extent_buffer(leaf);
3009 wret = btrfs_free_extent(trans, root, bytenr, 3057 wret = btrfs_free_extent(trans, root, bytenr,
3010 blocksize, 3058 blocksize, path->nodes[1]->start,
3011 btrfs_header_owner(path->nodes[1]), 3059 btrfs_header_owner(path->nodes[1]),
3012 root_gen, 0, 0, 1); 3060 root_gen, 0, 0, 1);
3013 if (wret) 3061 if (wret)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 730aae3bc181..138c157bbc45 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -40,7 +40,7 @@ extern struct kmem_cache *btrfs_bit_radix_cachep;
40extern struct kmem_cache *btrfs_path_cachep; 40extern struct kmem_cache *btrfs_path_cachep;
41struct btrfs_ordered_sum; 41struct btrfs_ordered_sum;
42 42
43#define BTRFS_MAGIC "_B8RfS_M" 43#define BTRFS_MAGIC "_B9RfS_M"
44 44
45#define BTRFS_ACL_NOT_CACHED ((void *)-1) 45#define BTRFS_ACL_NOT_CACHED ((void *)-1)
46 46
@@ -81,6 +81,9 @@ struct btrfs_ordered_sum;
81#define BTRFS_TREE_LOG_OBJECTID -6ULL 81#define BTRFS_TREE_LOG_OBJECTID -6ULL
82#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL 82#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
83 83
84/* dummy objectid represents multiple objectids */
85#define BTRFS_MULTIPLE_OBJECTIDS -255ULL
86
84/* 87/*
85 * All files have objectids in this range. 88 * All files have objectids in this range.
86 */ 89 */
@@ -369,6 +372,7 @@ struct btrfs_extent_ref {
369 __le64 generation; 372 __le64 generation;
370 __le64 objectid; 373 __le64 objectid;
371 __le64 offset; 374 __le64 offset;
375 __le32 num_refs;
372} __attribute__ ((__packed__)); 376} __attribute__ ((__packed__));
373 377
374/* dev extents record free space on individual devices. The owner 378/* dev extents record free space on individual devices. The owner
@@ -1047,9 +1051,6 @@ btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1047BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1051BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1048BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1052BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1049 1053
1050/* struct btrfs_extent_item */
1051BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1052
1053/* struct btrfs_dev_extent */ 1054/* struct btrfs_dev_extent */
1054BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1055BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1055 chunk_tree, 64); 1056 chunk_tree, 64);
@@ -1070,14 +1071,20 @@ BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1070BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64); 1071BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1071BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64); 1072BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1072BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64); 1073BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
1074BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1073 1075
1074BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64); 1076BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1075BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref, 1077BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1076 generation, 64); 1078 generation, 64);
1077BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref, 1079BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1078 objectid, 64); 1080 objectid, 64);
1079BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64); 1081BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref,
1082 offset, 64);
1083BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1084 num_refs, 32);
1080 1085
1086/* struct btrfs_extent_item */
1087BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1081BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, 1088BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1082 refs, 32); 1089 refs, 32);
1083 1090
@@ -1474,8 +1481,7 @@ static inline struct dentry *fdentry(struct file *file) {
1474} 1481}
1475 1482
1476/* extent-tree.c */ 1483/* extent-tree.c */
1477int btrfs_lookup_extent(struct btrfs_root *root, struct btrfs_path *path, 1484int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1478 u64 start, u64 len);
1479int btrfs_update_pinned_extents(struct btrfs_root *root, 1485int btrfs_update_pinned_extents(struct btrfs_root *root,
1480 u64 bytenr, u64 num, int pin); 1486 u64 bytenr, u64 num, int pin);
1481int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans, 1487int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
@@ -1495,10 +1501,9 @@ struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1495 int data, int owner); 1501 int data, int owner);
1496struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, 1502struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1497 struct btrfs_root *root, 1503 struct btrfs_root *root,
1498 u32 blocksize, 1504 u32 blocksize, u64 parent,
1499 u64 root_objectid, 1505 u64 root_objectid,
1500 u64 ref_generation, 1506 u64 ref_generation,
1501 u64 first_objectid,
1502 int level, 1507 int level,
1503 u64 hint, 1508 u64 hint,
1504 u64 empty_size); 1509 u64 empty_size);
@@ -1508,23 +1513,24 @@ struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1508int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size); 1513int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1509int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans, 1514int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1510 struct btrfs_root *root, 1515 struct btrfs_root *root,
1511 struct btrfs_path *path, u64 bytenr, 1516 struct btrfs_path *path,
1517 u64 bytenr, u64 parent,
1512 u64 root_objectid, u64 ref_generation, 1518 u64 root_objectid, u64 ref_generation,
1513 u64 owner, u64 owner_offset); 1519 u64 owner, u64 owner_offset);
1514int btrfs_alloc_extent(struct btrfs_trans_handle *trans, 1520int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1515 struct btrfs_root *root, 1521 struct btrfs_root *root,
1516 u64 num_bytes, u64 min_bytes, 1522 u64 num_bytes, u64 parent, u64 min_bytes,
1517 u64 root_objectid, u64 ref_generation, 1523 u64 root_objectid, u64 ref_generation,
1518 u64 owner, u64 owner_offset, 1524 u64 owner, u64 owner_offset,
1519 u64 empty_size, u64 hint_byte, 1525 u64 empty_size, u64 hint_byte,
1520 u64 search_end, struct btrfs_key *ins, u64 data); 1526 u64 search_end, struct btrfs_key *ins, u64 data);
1521int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans, 1527int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1522 struct btrfs_root *root, 1528 struct btrfs_root *root, u64 parent,
1523 u64 root_objectid, u64 ref_generation, 1529 u64 root_objectid, u64 ref_generation,
1524 u64 owner, u64 owner_offset, 1530 u64 owner, u64 owner_offset,
1525 struct btrfs_key *ins); 1531 struct btrfs_key *ins);
1526int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans, 1532int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1527 struct btrfs_root *root, 1533 struct btrfs_root *root, u64 parent,
1528 u64 root_objectid, u64 ref_generation, 1534 u64 root_objectid, u64 ref_generation,
1529 u64 owner, u64 owner_offset, 1535 u64 owner, u64 owner_offset,
1530 struct btrfs_key *ins); 1536 struct btrfs_key *ins);
@@ -1535,9 +1541,16 @@ int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1535 u64 search_end, struct btrfs_key *ins, 1541 u64 search_end, struct btrfs_key *ins,
1536 u64 data); 1542 u64 data);
1537int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 1543int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1538 struct extent_buffer *buf, int cache_ref); 1544 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1539int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root 1545 u32 *nr_extents);
1540 *root, u64 bytenr, u64 num_bytes, 1546int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1547 struct extent_buffer *buf, u32 nr_extents);
1548int btrfs_update_ref(struct btrfs_trans_handle *trans,
1549 struct btrfs_root *root, struct extent_buffer *orig_buf,
1550 struct extent_buffer *buf, int start_slot, int nr);
1551int btrfs_free_extent(struct btrfs_trans_handle *trans,
1552 struct btrfs_root *root,
1553 u64 bytenr, u64 num_bytes, u64 parent,
1541 u64 root_objectid, u64 ref_generation, 1554 u64 root_objectid, u64 ref_generation,
1542 u64 owner_objectid, u64 owner_offset, int pin); 1555 u64 owner_objectid, u64 owner_offset, int pin);
1543int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len); 1556int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
@@ -1545,10 +1558,15 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1545 struct btrfs_root *root, 1558 struct btrfs_root *root,
1546 struct extent_io_tree *unpin); 1559 struct extent_io_tree *unpin);
1547int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 1560int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1548 struct btrfs_root *root, 1561 struct btrfs_root *root,
1549 u64 bytenr, u64 num_bytes, 1562 u64 bytenr, u64 num_bytes, u64 parent,
1550 u64 root_objectid, u64 ref_generation, 1563 u64 root_objectid, u64 ref_generation,
1551 u64 owner, u64 owner_offset); 1564 u64 owner, u64 owner_offset);
1565int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1566 struct btrfs_root *root, u64 bytenr,
1567 u64 orig_parent, u64 parent,
1568 u64 root_objectid, u64 ref_generation,
1569 u64 owner, u64 owner_offset);
1552int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, 1570int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1553 struct btrfs_root *root); 1571 struct btrfs_root *root);
1554int btrfs_free_block_groups(struct btrfs_fs_info *info); 1572int btrfs_free_block_groups(struct btrfs_fs_info *info);
@@ -1561,7 +1579,9 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1561int btrfs_previous_item(struct btrfs_root *root, 1579int btrfs_previous_item(struct btrfs_root *root,
1562 struct btrfs_path *path, u64 min_objectid, 1580 struct btrfs_path *path, u64 min_objectid,
1563 int type); 1581 int type);
1564 1582int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1583 struct btrfs_root *root, struct btrfs_path *path,
1584 struct btrfs_key *new_key);
1565struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 1585struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1566struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 1586struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1567int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 1587int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 25be96946a2f..d35ca6a3f513 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -882,8 +882,8 @@ int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
882 root->ref_cows = 0; 882 root->ref_cows = 0;
883 883
884 root->node = btrfs_alloc_free_block(trans, root, root->leafsize, 884 root->node = btrfs_alloc_free_block(trans, root, root->leafsize,
885 BTRFS_TREE_LOG_OBJECTID, 885 0, BTRFS_TREE_LOG_OBJECTID,
886 0, 0, 0, 0, 0); 886 trans->transid, 0, 0, 0);
887 887
888 btrfs_set_header_nritems(root->node, 0); 888 btrfs_set_header_nritems(root->node, 0);
889 btrfs_set_header_level(root->node, 0); 889 btrfs_set_header_level(root->node, 0);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 558fbe407368..5258923d621f 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -29,6 +29,21 @@
29#include "locking.h" 29#include "locking.h"
30#include "ref-cache.h" 30#include "ref-cache.h"
31 31
32#define PENDING_EXTENT_INSERT 0
33#define PENDING_EXTENT_DELETE 1
34#define PENDING_BACKREF_UPDATE 2
35
36struct pending_extent_op {
37 int type;
38 u64 bytenr;
39 u64 num_bytes;
40 u64 parent;
41 u64 orig_parent;
42 u64 generation;
43 u64 orig_generation;
44 int level;
45};
46
32static int finish_current_insert(struct btrfs_trans_handle *trans, struct 47static int finish_current_insert(struct btrfs_trans_handle *trans, struct
33 btrfs_root *extent_root); 48 btrfs_root *extent_root);
34static int del_pending_extents(struct btrfs_trans_handle *trans, struct 49static int del_pending_extents(struct btrfs_trans_handle *trans, struct
@@ -487,48 +502,15 @@ struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
487 return ret; 502 return ret;
488} 503}
489 504
490static u64 hash_extent_ref(u64 root_objectid, u64 ref_generation,
491 u64 owner, u64 owner_offset)
492{
493 u32 high_crc = ~(u32)0;
494 u32 low_crc = ~(u32)0;
495 __le64 lenum;
496 lenum = cpu_to_le64(root_objectid);
497 high_crc = btrfs_crc32c(high_crc, &lenum, sizeof(lenum));
498 lenum = cpu_to_le64(ref_generation);
499 low_crc = btrfs_crc32c(low_crc, &lenum, sizeof(lenum));
500 if (owner >= BTRFS_FIRST_FREE_OBJECTID) {
501 lenum = cpu_to_le64(owner);
502 low_crc = btrfs_crc32c(low_crc, &lenum, sizeof(lenum));
503 lenum = cpu_to_le64(owner_offset);
504 low_crc = btrfs_crc32c(low_crc, &lenum, sizeof(lenum));
505 }
506 return ((u64)high_crc << 32) | (u64)low_crc;
507}
508
509static int match_extent_ref(struct extent_buffer *leaf,
510 struct btrfs_extent_ref *disk_ref,
511 struct btrfs_extent_ref *cpu_ref)
512{
513 int ret;
514 int len;
515
516 if (cpu_ref->objectid)
517 len = sizeof(*cpu_ref);
518 else
519 len = 2 * sizeof(u64);
520 ret = memcmp_extent_buffer(leaf, cpu_ref, (unsigned long)disk_ref,
521 len);
522 return ret == 0;
523}
524
525/* simple helper to search for an existing extent at a given offset */ 505/* simple helper to search for an existing extent at a given offset */
526int btrfs_lookup_extent(struct btrfs_root *root, struct btrfs_path *path, 506int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len)
527 u64 start, u64 len)
528{ 507{
529 int ret; 508 int ret;
530 struct btrfs_key key; 509 struct btrfs_key key;
510 struct btrfs_path *path;
531 511
512 path = btrfs_alloc_path();
513 BUG_ON(!path);
532 maybe_lock_mutex(root); 514 maybe_lock_mutex(root);
533 key.objectid = start; 515 key.objectid = start;
534 key.offset = len; 516 key.offset = len;
@@ -536,72 +518,7 @@ int btrfs_lookup_extent(struct btrfs_root *root, struct btrfs_path *path,
536 ret = btrfs_search_slot(NULL, root->fs_info->extent_root, &key, path, 518 ret = btrfs_search_slot(NULL, root->fs_info->extent_root, &key, path,
537 0, 0); 519 0, 0);
538 maybe_unlock_mutex(root); 520 maybe_unlock_mutex(root);
539 return ret; 521 btrfs_free_path(path);
540}
541
542static int noinline lookup_extent_backref(struct btrfs_trans_handle *trans,
543 struct btrfs_root *root,
544 struct btrfs_path *path, u64 bytenr,
545 u64 root_objectid,
546 u64 ref_generation, u64 owner,
547 u64 owner_offset, int del)
548{
549 u64 hash;
550 struct btrfs_key key;
551 struct btrfs_key found_key;
552 struct btrfs_extent_ref ref;
553 struct extent_buffer *leaf;
554 struct btrfs_extent_ref *disk_ref;
555 int ret;
556 int ret2;
557
558 btrfs_set_stack_ref_root(&ref, root_objectid);
559 btrfs_set_stack_ref_generation(&ref, ref_generation);
560 btrfs_set_stack_ref_objectid(&ref, owner);
561 btrfs_set_stack_ref_offset(&ref, owner_offset);
562
563 hash = hash_extent_ref(root_objectid, ref_generation, owner,
564 owner_offset);
565 key.offset = hash;
566 key.objectid = bytenr;
567 key.type = BTRFS_EXTENT_REF_KEY;
568
569 while (1) {
570 ret = btrfs_search_slot(trans, root, &key, path,
571 del ? -1 : 0, del);
572 if (ret < 0)
573 goto out;
574 leaf = path->nodes[0];
575 if (ret != 0) {
576 u32 nritems = btrfs_header_nritems(leaf);
577 if (path->slots[0] >= nritems) {
578 ret2 = btrfs_next_leaf(root, path);
579 if (ret2)
580 goto out;
581 leaf = path->nodes[0];
582 }
583 btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
584 if (found_key.objectid != bytenr ||
585 found_key.type != BTRFS_EXTENT_REF_KEY)
586 goto out;
587 key.offset = found_key.offset;
588 if (del) {
589 btrfs_release_path(root, path);
590 continue;
591 }
592 }
593 disk_ref = btrfs_item_ptr(path->nodes[0],
594 path->slots[0],
595 struct btrfs_extent_ref);
596 if (match_extent_ref(path->nodes[0], disk_ref, &ref)) {
597 ret = 0;
598 goto out;
599 }
600 btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
601 key.offset = found_key.offset + 1;
602 btrfs_release_path(root, path);
603 }
604out:
605 return ret; 522 return ret;
606} 523}
607 524
@@ -622,7 +539,7 @@ out:
622 * File extents can be referenced by: 539 * File extents can be referenced by:
623 * 540 *
624 * - multiple snapshots, subvolumes, or different generations in one subvol 541 * - multiple snapshots, subvolumes, or different generations in one subvol
625 * - different files inside a single subvolume (in theory, not implemented yet) 542 * - different files inside a single subvolume
626 * - different offsets inside a file (bookend extents in file.c) 543 * - different offsets inside a file (bookend extents in file.c)
627 * 544 *
628 * The extent ref structure has fields for: 545 * The extent ref structure has fields for:
@@ -631,119 +548,284 @@ out:
631 * - Generation number of the tree holding the reference 548 * - Generation number of the tree holding the reference
632 * - objectid of the file holding the reference 549 * - objectid of the file holding the reference
633 * - offset in the file corresponding to the key holding the reference 550 * - offset in the file corresponding to the key holding the reference
551 * - number of references holding by parent node (alway 1 for tree blocks)
552 *
553 * Btree leaf may hold multiple references to a file extent. In most cases,
554 * these references are from same file and the corresponding offsets inside
555 * the file are close together. So inode objectid and offset in file are
556 * just hints, they provide hints about where in the btree the references
557 * can be found and when we can stop searching.
634 * 558 *
635 * When a file extent is allocated the fields are filled in: 559 * When a file extent is allocated the fields are filled in:
636 * (root_key.objectid, trans->transid, inode objectid, offset in file) 560 * (root_key.objectid, trans->transid, inode objectid, offset in file, 1)
637 * 561 *
638 * When a leaf is cow'd new references are added for every file extent found 562 * When a leaf is cow'd new references are added for every file extent found
639 * in the leaf. It looks the same as the create case, but trans->transid 563 * in the leaf. It looks similar to the create case, but trans->transid will
640 * will be different when the block is cow'd. 564 * be different when the block is cow'd.
641 * 565 *
642 * (root_key.objectid, trans->transid, inode objectid, offset in file) 566 * (root_key.objectid, trans->transid, inode objectid, offset in file,
567 * number of references in the leaf)
643 * 568 *
644 * When a file extent is removed either during snapshot deletion or file 569 * Because inode objectid and offset in file are just hints, they are not
645 * truncation, the corresponding back reference is found 570 * used when backrefs are deleted. When a file extent is removed either
646 * by searching for: 571 * during snapshot deletion or file truncation, we find the corresponding
572 * back back reference and check the following fields.
647 * 573 *
648 * (btrfs_header_owner(leaf), btrfs_header_generation(leaf), 574 * (btrfs_header_owner(leaf), btrfs_header_generation(leaf))
649 * inode objectid, offset in file)
650 * 575 *
651 * Btree extents can be referenced by: 576 * Btree extents can be referenced by:
652 * 577 *
653 * - Different subvolumes 578 * - Different subvolumes
654 * - Different generations of the same subvolume 579 * - Different generations of the same subvolume
655 * 580 *
656 * Storing sufficient information for a full reverse mapping of a btree
657 * block would require storing the lowest key of the block in the backref,
658 * and it would require updating that lowest key either before write out or
659 * every time it changed. Instead, the objectid of the lowest key is stored
660 * along with the level of the tree block. This provides a hint
661 * about where in the btree the block can be found. Searches through the
662 * btree only need to look for a pointer to that block, so they stop one
663 * level higher than the level recorded in the backref.
664 *
665 * Some btrees do not do reference counting on their extents. These
666 * include the extent tree and the tree of tree roots. Backrefs for these
667 * trees always have a generation of zero.
668 *
669 * When a tree block is created, back references are inserted: 581 * When a tree block is created, back references are inserted:
670 * 582 *
671 * (root->root_key.objectid, trans->transid or zero, level, lowest_key_objectid) 583 * (root->root_key.objectid, trans->transid, level, 0, 1)
672 * 584 *
673 * When a tree block is cow'd in a reference counted root, 585 * When a tree block is cow'd, new back references are added for all the
674 * new back references are added for all the blocks it points to. 586 * blocks it points to. If the tree block isn't in reference counted root,
675 * These are of the form (trans->transid will have increased since creation): 587 * the old back references are removed. These new back references are of
588 * the form (trans->transid will have increased since creation):
676 * 589 *
677 * (root->root_key.objectid, trans->transid, level, lowest_key_objectid) 590 * (root->root_key.objectid, trans->transid, level, 0, 1)
678 * 591 *
679 * Because the lowest_key_objectid and the level are just hints 592 * When a backref is in deleting, the following fields are checked:
680 * they are not used when backrefs are deleted. When a backref is deleted:
681 * 593 *
682 * if backref was for a tree root: 594 * if backref was for a tree root:
683 * root_objectid = root->root_key.objectid 595 * (btrfs_header_owner(itself), btrfs_header_generation(itself))
684 * else 596 * else
685 * root_objectid = btrfs_header_owner(parent) 597 * (btrfs_header_owner(parent), btrfs_header_generation(parent))
686 * 598 *
687 * (root_objectid, btrfs_header_generation(parent) or zero, 0, 0) 599 * Back Reference Key composing:
688 * 600 *
689 * Back Reference Key hashing: 601 * The key objectid corresponds to the first byte in the extent, the key
690 * 602 * type is set to BTRFS_EXTENT_REF_KEY, and the key offset is the first
691 * Back references have four fields, each 64 bits long. Unfortunately, 603 * byte of parent extent. If a extent is tree root, the key offset is set
692 * This is hashed into a single 64 bit number and placed into the key offset. 604 * to the key objectid.
693 * The key objectid corresponds to the first byte in the extent, and the
694 * key type is set to BTRFS_EXTENT_REF_KEY
695 */ 605 */
696int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans, 606
697 struct btrfs_root *root, 607static int noinline lookup_extent_backref(struct btrfs_trans_handle *trans,
698 struct btrfs_path *path, u64 bytenr, 608 struct btrfs_root *root,
699 u64 root_objectid, u64 ref_generation, 609 struct btrfs_path *path, u64 bytenr,
700 u64 owner, u64 owner_offset) 610 u64 parent, u64 ref_root,
611 u64 ref_generation, int del)
701{ 612{
702 u64 hash;
703 struct btrfs_key key; 613 struct btrfs_key key;
704 struct btrfs_extent_ref ref; 614 struct btrfs_extent_ref *ref;
705 struct btrfs_extent_ref *disk_ref; 615 struct extent_buffer *leaf;
706 int ret; 616 int ret;
707 617
708 btrfs_set_stack_ref_root(&ref, root_objectid); 618 key.objectid = bytenr;
709 btrfs_set_stack_ref_generation(&ref, ref_generation); 619 key.type = BTRFS_EXTENT_REF_KEY;
710 btrfs_set_stack_ref_objectid(&ref, owner); 620 key.offset = parent;
711 btrfs_set_stack_ref_offset(&ref, owner_offset); 621
622 ret = btrfs_search_slot(trans, root, &key, path, del ? -1 : 0, 1);
623 if (ret < 0)
624 goto out;
625 if (ret > 0) {
626 ret = -ENOENT;
627 goto out;
628 }
629
630 leaf = path->nodes[0];
631 ref = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_ref);
632 if (btrfs_ref_root(leaf, ref) != ref_root ||
633 btrfs_ref_generation(leaf, ref) != ref_generation) {
634 ret = -EIO;
635 WARN_ON(1);
636 goto out;
637 }
638 ret = 0;
639out:
640 return ret;
641}
642
643static int noinline insert_extent_backref(struct btrfs_trans_handle *trans,
644 struct btrfs_root *root,
645 struct btrfs_path *path,
646 u64 bytenr, u64 parent,
647 u64 ref_root, u64 ref_generation,
648 u64 owner_objectid, u64 owner_offset)
649{
650 struct btrfs_key key;
651 struct extent_buffer *leaf;
652 struct btrfs_extent_ref *ref;
653 u32 num_refs;
654 int ret;
712 655
713 hash = hash_extent_ref(root_objectid, ref_generation, owner,
714 owner_offset);
715 key.offset = hash;
716 key.objectid = bytenr; 656 key.objectid = bytenr;
717 key.type = BTRFS_EXTENT_REF_KEY; 657 key.type = BTRFS_EXTENT_REF_KEY;
658 key.offset = parent;
718 659
719 ret = btrfs_insert_empty_item(trans, root, path, &key, sizeof(ref)); 660 ret = btrfs_insert_empty_item(trans, root, path, &key, sizeof(*ref));
720 while (ret == -EEXIST) { 661 if (ret == 0) {
721 disk_ref = btrfs_item_ptr(path->nodes[0], path->slots[0], 662 leaf = path->nodes[0];
722 struct btrfs_extent_ref); 663 ref = btrfs_item_ptr(leaf, path->slots[0],
723 if (match_extent_ref(path->nodes[0], disk_ref, &ref)) 664 struct btrfs_extent_ref);
665 btrfs_set_ref_root(leaf, ref, ref_root);
666 btrfs_set_ref_generation(leaf, ref, ref_generation);
667 btrfs_set_ref_objectid(leaf, ref, owner_objectid);
668 btrfs_set_ref_offset(leaf, ref, owner_offset);
669 btrfs_set_ref_num_refs(leaf, ref, 1);
670 } else if (ret == -EEXIST) {
671 u64 existing_owner;
672 BUG_ON(owner_objectid < BTRFS_FIRST_FREE_OBJECTID);
673 leaf = path->nodes[0];
674 ref = btrfs_item_ptr(leaf, path->slots[0],
675 struct btrfs_extent_ref);
676 if (btrfs_ref_root(leaf, ref) != ref_root ||
677 btrfs_ref_generation(leaf, ref) != ref_generation) {
678 ret = -EIO;
679 WARN_ON(1);
724 goto out; 680 goto out;
725 key.offset++; 681 }
726 btrfs_release_path(root, path); 682
727 ret = btrfs_insert_empty_item(trans, root, path, &key, 683 num_refs = btrfs_ref_num_refs(leaf, ref);
728 sizeof(ref)); 684 BUG_ON(num_refs == 0);
729 } 685 btrfs_set_ref_num_refs(leaf, ref, num_refs + 1);
730 if (ret) 686
687 existing_owner = btrfs_ref_objectid(leaf, ref);
688 if (existing_owner == owner_objectid &&
689 btrfs_ref_offset(leaf, ref) > owner_offset) {
690 btrfs_set_ref_offset(leaf, ref, owner_offset);
691 } else if (existing_owner != owner_objectid &&
692 existing_owner != BTRFS_MULTIPLE_OBJECTIDS) {
693 btrfs_set_ref_objectid(leaf, ref,
694 BTRFS_MULTIPLE_OBJECTIDS);
695 btrfs_set_ref_offset(leaf, ref, 0);
696 }
697 ret = 0;
698 } else {
731 goto out; 699 goto out;
732 disk_ref = btrfs_item_ptr(path->nodes[0], path->slots[0], 700 }
733 struct btrfs_extent_ref);
734 write_extent_buffer(path->nodes[0], &ref, (unsigned long)disk_ref,
735 sizeof(ref));
736 btrfs_mark_buffer_dirty(path->nodes[0]); 701 btrfs_mark_buffer_dirty(path->nodes[0]);
737out: 702out:
738 btrfs_release_path(root, path); 703 btrfs_release_path(root, path);
739 return ret; 704 return ret;
740} 705}
741 706
707static int noinline remove_extent_backref(struct btrfs_trans_handle *trans,
708 struct btrfs_root *root,
709 struct btrfs_path *path)
710{
711 struct extent_buffer *leaf;
712 struct btrfs_extent_ref *ref;
713 u32 num_refs;
714 int ret = 0;
715
716 leaf = path->nodes[0];
717 ref = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_ref);
718 num_refs = btrfs_ref_num_refs(leaf, ref);
719 BUG_ON(num_refs == 0);
720 num_refs -= 1;
721 if (num_refs == 0) {
722 ret = btrfs_del_item(trans, root, path);
723 } else {
724 btrfs_set_ref_num_refs(leaf, ref, num_refs);
725 btrfs_mark_buffer_dirty(leaf);
726 }
727 btrfs_release_path(root, path);
728 return ret;
729}
730
731static int __btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
732 struct btrfs_root *root, u64 bytenr,
733 u64 orig_parent, u64 parent,
734 u64 orig_root, u64 ref_root,
735 u64 orig_generation, u64 ref_generation,
736 u64 owner_objectid, u64 owner_offset)
737{
738 int ret;
739 struct btrfs_root *extent_root = root->fs_info->extent_root;
740 struct btrfs_path *path;
741
742 if (root == root->fs_info->extent_root) {
743 struct pending_extent_op *extent_op;
744 u64 num_bytes;
745
746 BUG_ON(owner_objectid >= BTRFS_MAX_LEVEL);
747 num_bytes = btrfs_level_size(root, (int)owner_objectid);
748 if (test_range_bit(&root->fs_info->extent_ins, bytenr,
749 bytenr + num_bytes - 1, EXTENT_LOCKED, 0)) {
750 u64 priv;
751 ret = get_state_private(&root->fs_info->extent_ins,
752 bytenr, &priv);
753 BUG_ON(ret);
754 extent_op = (struct pending_extent_op *)
755 (unsigned long)priv;
756 BUG_ON(extent_op->parent != orig_parent);
757 BUG_ON(extent_op->generation != orig_generation);
758 extent_op->parent = parent;
759 extent_op->generation = ref_generation;
760 } else {
761 extent_op = kmalloc(sizeof(*extent_op), GFP_NOFS);
762 BUG_ON(!extent_op);
763
764 extent_op->type = PENDING_BACKREF_UPDATE;
765 extent_op->bytenr = bytenr;
766 extent_op->num_bytes = num_bytes;
767 extent_op->parent = parent;
768 extent_op->orig_parent = orig_parent;
769 extent_op->generation = ref_generation;
770 extent_op->orig_generation = orig_generation;
771 extent_op->level = (int)owner_objectid;
772
773 set_extent_bits(&root->fs_info->extent_ins,
774 bytenr, bytenr + num_bytes - 1,
775 EXTENT_LOCKED, GFP_NOFS);
776 set_state_private(&root->fs_info->extent_ins,
777 bytenr, (unsigned long)extent_op);
778 }
779 return 0;
780 }
781
782 path = btrfs_alloc_path();
783 if (!path)
784 return -ENOMEM;
785 ret = lookup_extent_backref(trans, extent_root, path,
786 bytenr, orig_parent, orig_root,
787 orig_generation, 1);
788 if (ret)
789 goto out;
790 ret = remove_extent_backref(trans, extent_root, path);
791 if (ret)
792 goto out;
793 ret = insert_extent_backref(trans, extent_root, path, bytenr,
794 parent, ref_root, ref_generation,
795 owner_objectid, owner_offset);
796 BUG_ON(ret);
797 finish_current_insert(trans, extent_root);
798 del_pending_extents(trans, extent_root);
799out:
800 btrfs_free_path(path);
801 return ret;
802}
803
804int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
805 struct btrfs_root *root, u64 bytenr,
806 u64 orig_parent, u64 parent,
807 u64 ref_root, u64 ref_generation,
808 u64 owner_objectid, u64 owner_offset)
809{
810 int ret;
811 if (ref_root == BTRFS_TREE_LOG_OBJECTID &&
812 owner_objectid < BTRFS_FIRST_FREE_OBJECTID)
813 return 0;
814 maybe_lock_mutex(root);
815 ret = __btrfs_update_extent_ref(trans, root, bytenr, orig_parent,
816 parent, ref_root, ref_root,
817 ref_generation, ref_generation,
818 owner_objectid, owner_offset);
819 maybe_unlock_mutex(root);
820 return ret;
821}
822
742static int __btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 823static int __btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
743 struct btrfs_root *root, 824 struct btrfs_root *root, u64 bytenr,
744 u64 bytenr, u64 num_bytes, 825 u64 orig_parent, u64 parent,
745 u64 root_objectid, u64 ref_generation, 826 u64 orig_root, u64 ref_root,
746 u64 owner, u64 owner_offset) 827 u64 orig_generation, u64 ref_generation,
828 u64 owner_objectid, u64 owner_offset)
747{ 829{
748 struct btrfs_path *path; 830 struct btrfs_path *path;
749 int ret; 831 int ret;
@@ -752,24 +834,28 @@ static int __btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
752 struct btrfs_extent_item *item; 834 struct btrfs_extent_item *item;
753 u32 refs; 835 u32 refs;
754 836
755 WARN_ON(num_bytes < root->sectorsize);
756 path = btrfs_alloc_path(); 837 path = btrfs_alloc_path();
757 if (!path) 838 if (!path)
758 return -ENOMEM; 839 return -ENOMEM;
759 840
760 path->reada = 1; 841 path->reada = 1;
761 key.objectid = bytenr; 842 key.objectid = bytenr;
762 btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY); 843 key.type = BTRFS_EXTENT_ITEM_KEY;
763 key.offset = num_bytes; 844 key.offset = (u64)-1;
845
764 ret = btrfs_search_slot(trans, root->fs_info->extent_root, &key, path, 846 ret = btrfs_search_slot(trans, root->fs_info->extent_root, &key, path,
765 0, 1); 847 0, 1);
766 if (ret < 0) 848 if (ret < 0)
767 return ret; 849 return ret;
768 if (ret != 0) { 850 BUG_ON(ret == 0 || path->slots[0] == 0);
769 BUG(); 851
770 } 852 path->slots[0]--;
771 BUG_ON(ret != 0);
772 l = path->nodes[0]; 853 l = path->nodes[0];
854
855 btrfs_item_key_to_cpu(l, &key, path->slots[0]);
856 BUG_ON(key.objectid != bytenr);
857 BUG_ON(key.type != BTRFS_EXTENT_ITEM_KEY);
858
773 item = btrfs_item_ptr(l, path->slots[0], struct btrfs_extent_item); 859 item = btrfs_item_ptr(l, path->slots[0], struct btrfs_extent_item);
774 refs = btrfs_extent_refs(l, item); 860 refs = btrfs_extent_refs(l, item);
775 btrfs_set_extent_refs(l, item, refs + 1); 861 btrfs_set_extent_refs(l, item, refs + 1);
@@ -778,9 +864,10 @@ static int __btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
778 btrfs_release_path(root->fs_info->extent_root, path); 864 btrfs_release_path(root->fs_info->extent_root, path);
779 865
780 path->reada = 1; 866 path->reada = 1;
781 ret = btrfs_insert_extent_backref(trans, root->fs_info->extent_root, 867 ret = insert_extent_backref(trans, root->fs_info->extent_root,
782 path, bytenr, root_objectid, 868 path, bytenr, parent,
783 ref_generation, owner, owner_offset); 869 ref_root, ref_generation,
870 owner_objectid, owner_offset);
784 BUG_ON(ret); 871 BUG_ON(ret);
785 finish_current_insert(trans, root->fs_info->extent_root); 872 finish_current_insert(trans, root->fs_info->extent_root);
786 del_pending_extents(trans, root->fs_info->extent_root); 873 del_pending_extents(trans, root->fs_info->extent_root);
@@ -790,18 +877,20 @@ static int __btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
790} 877}
791 878
792int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 879int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
793 struct btrfs_root *root, 880 struct btrfs_root *root,
794 u64 bytenr, u64 num_bytes, 881 u64 bytenr, u64 num_bytes, u64 parent,
795 u64 root_objectid, u64 ref_generation, 882 u64 ref_root, u64 ref_generation,
796 u64 owner, u64 owner_offset) 883 u64 owner_objectid, u64 owner_offset)
797{ 884{
798 int ret; 885 int ret;
799 886 if (ref_root == BTRFS_TREE_LOG_OBJECTID &&
800 mutex_lock(&root->fs_info->alloc_mutex); 887 owner_objectid < BTRFS_FIRST_FREE_OBJECTID)
801 ret = __btrfs_inc_extent_ref(trans, root, bytenr, num_bytes, 888 return 0;
802 root_objectid, ref_generation, 889 maybe_lock_mutex(root);
803 owner, owner_offset); 890 ret = __btrfs_inc_extent_ref(trans, root, bytenr, 0, parent,
804 mutex_unlock(&root->fs_info->alloc_mutex); 891 0, ref_root, 0, ref_generation,
892 owner_objectid, owner_offset);
893 maybe_unlock_mutex(root);
805 return ret; 894 return ret;
806} 895}
807 896
@@ -813,9 +902,9 @@ int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
813 return 0; 902 return 0;
814} 903}
815 904
816static int lookup_extent_ref(struct btrfs_trans_handle *trans, 905int btrfs_lookup_extent_ref(struct btrfs_trans_handle *trans,
817 struct btrfs_root *root, u64 bytenr, 906 struct btrfs_root *root, u64 bytenr,
818 u64 num_bytes, u32 *refs) 907 u64 num_bytes, u32 *refs)
819{ 908{
820 struct btrfs_path *path; 909 struct btrfs_path *path;
821 int ret; 910 int ret;
@@ -846,7 +935,6 @@ out:
846 return 0; 935 return 0;
847} 936}
848 937
849
850static int get_reference_status(struct btrfs_root *root, u64 bytenr, 938static int get_reference_status(struct btrfs_root *root, u64 bytenr,
851 u64 parent_gen, u64 ref_objectid, 939 u64 parent_gen, u64 ref_objectid,
852 u64 *min_generation, u32 *ref_count) 940 u64 *min_generation, u32 *ref_count)
@@ -863,7 +951,7 @@ static int get_reference_status(struct btrfs_root *root, u64 bytenr,
863 int ret; 951 int ret;
864 952
865 key.objectid = bytenr; 953 key.objectid = bytenr;
866 key.offset = 0; 954 key.offset = (u64)-1;
867 key.type = BTRFS_EXTENT_ITEM_KEY; 955 key.type = BTRFS_EXTENT_ITEM_KEY;
868 956
869 path = btrfs_alloc_path(); 957 path = btrfs_alloc_path();
@@ -872,7 +960,10 @@ static int get_reference_status(struct btrfs_root *root, u64 bytenr,
872 if (ret < 0) 960 if (ret < 0)
873 goto out; 961 goto out;
874 BUG_ON(ret == 0); 962 BUG_ON(ret == 0);
963 if (ret < 0 || path->slots[0] == 0)
964 goto out;
875 965
966 path->slots[0]--;
876 leaf = path->nodes[0]; 967 leaf = path->nodes[0];
877 btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]); 968 btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
878 969
@@ -909,7 +1000,7 @@ static int get_reference_status(struct btrfs_root *root, u64 bytenr,
909 struct btrfs_extent_ref); 1000 struct btrfs_extent_ref);
910 ref_generation = btrfs_ref_generation(leaf, ref_item); 1001 ref_generation = btrfs_ref_generation(leaf, ref_item);
911 /* 1002 /*
912 * For (parent_gen > 0 && parent_gen > ref_gen): 1003 * For (parent_gen > 0 && parent_gen > ref_generation):
913 * 1004 *
914 * we reach here through the oldest root, therefore 1005 * we reach here through the oldest root, therefore
915 * all other reference from same snapshot should have 1006 * all other reference from same snapshot should have
@@ -919,8 +1010,7 @@ static int get_reference_status(struct btrfs_root *root, u64 bytenr,
919 (parent_gen > 0 && parent_gen > ref_generation) || 1010 (parent_gen > 0 && parent_gen > ref_generation) ||
920 (ref_objectid >= BTRFS_FIRST_FREE_OBJECTID && 1011 (ref_objectid >= BTRFS_FIRST_FREE_OBJECTID &&
921 ref_objectid != btrfs_ref_objectid(leaf, ref_item))) { 1012 ref_objectid != btrfs_ref_objectid(leaf, ref_item))) {
922 if (ref_count) 1013 *ref_count = 2;
923 *ref_count = 2;
924 break; 1014 break;
925 } 1015 }
926 1016
@@ -1020,80 +1110,29 @@ out:
1020 return ret; 1110 return ret;
1021} 1111}
1022 1112
1023int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 1113int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1024 struct extent_buffer *buf, int cache_ref) 1114 struct extent_buffer *buf, u32 nr_extents)
1025{ 1115{
1026 u64 bytenr;
1027 u32 nritems; 1116 u32 nritems;
1028 struct btrfs_key key; 1117 struct btrfs_key key;
1029 struct btrfs_file_extent_item *fi; 1118 struct btrfs_file_extent_item *fi;
1030 int i; 1119 int i;
1031 int level; 1120 int level;
1032 int ret; 1121 int ret = 0;
1033 int faili;
1034 int nr_file_extents = 0;
1035 1122
1036 if (!root->ref_cows) 1123 if (!root->ref_cows)
1037 return 0; 1124 return 0;
1038 1125
1039 level = btrfs_header_level(buf); 1126 level = btrfs_header_level(buf);
1040 nritems = btrfs_header_nritems(buf); 1127 nritems = btrfs_header_nritems(buf);
1041 for (i = 0; i < nritems; i++) {
1042 cond_resched();
1043 if (level == 0) {
1044 u64 disk_bytenr;
1045 btrfs_item_key_to_cpu(buf, &key, i);
1046 if (btrfs_key_type(&key) != BTRFS_EXTENT_DATA_KEY)
1047 continue;
1048 fi = btrfs_item_ptr(buf, i,
1049 struct btrfs_file_extent_item);
1050 if (btrfs_file_extent_type(buf, fi) ==
1051 BTRFS_FILE_EXTENT_INLINE)
1052 continue;
1053 disk_bytenr = btrfs_file_extent_disk_bytenr(buf, fi);
1054 if (disk_bytenr == 0)
1055 continue;
1056
1057 if (buf != root->commit_root)
1058 nr_file_extents++;
1059
1060 mutex_lock(&root->fs_info->alloc_mutex);
1061 ret = __btrfs_inc_extent_ref(trans, root, disk_bytenr,
1062 btrfs_file_extent_disk_num_bytes(buf, fi),
1063 root->root_key.objectid, trans->transid,
1064 key.objectid, key.offset);
1065 mutex_unlock(&root->fs_info->alloc_mutex);
1066 if (ret) {
1067 faili = i;
1068 WARN_ON(1);
1069 goto fail;
1070 }
1071 } else {
1072 bytenr = btrfs_node_blockptr(buf, i);
1073 btrfs_node_key_to_cpu(buf, &key, i);
1074 1128
1075 mutex_lock(&root->fs_info->alloc_mutex); 1129 if (level == 0) {
1076 ret = __btrfs_inc_extent_ref(trans, root, bytenr,
1077 btrfs_level_size(root, level - 1),
1078 root->root_key.objectid,
1079 trans->transid,
1080 level - 1, key.objectid);
1081 mutex_unlock(&root->fs_info->alloc_mutex);
1082 if (ret) {
1083 faili = i;
1084 WARN_ON(1);
1085 goto fail;
1086 }
1087 }
1088 }
1089 /* cache orignal leaf block's references */
1090 if (level == 0 && cache_ref && buf != root->commit_root) {
1091 struct btrfs_leaf_ref *ref; 1130 struct btrfs_leaf_ref *ref;
1092 struct btrfs_extent_info *info; 1131 struct btrfs_extent_info *info;
1093 1132
1094 ref = btrfs_alloc_leaf_ref(root, nr_file_extents); 1133 ref = btrfs_alloc_leaf_ref(root, nr_extents);
1095 if (!ref) { 1134 if (!ref) {
1096 WARN_ON(1); 1135 ret = -ENOMEM;
1097 goto out; 1136 goto out;
1098 } 1137 }
1099 1138
@@ -1101,10 +1140,10 @@ int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1101 ref->bytenr = buf->start; 1140 ref->bytenr = buf->start;
1102 ref->owner = btrfs_header_owner(buf); 1141 ref->owner = btrfs_header_owner(buf);
1103 ref->generation = btrfs_header_generation(buf); 1142 ref->generation = btrfs_header_generation(buf);
1104 ref->nritems = nr_file_extents; 1143 ref->nritems = nr_extents;
1105 info = ref->extents; 1144 info = ref->extents;
1106 1145
1107 for (i = 0; nr_file_extents > 0 && i < nritems; i++) { 1146 for (i = 0; nr_extents > 0 && i < nritems; i++) {
1108 u64 disk_bytenr; 1147 u64 disk_bytenr;
1109 btrfs_item_key_to_cpu(buf, &key, i); 1148 btrfs_item_key_to_cpu(buf, &key, i);
1110 if (btrfs_key_type(&key) != BTRFS_EXTENT_DATA_KEY) 1149 if (btrfs_key_type(&key) != BTRFS_EXTENT_DATA_KEY)
@@ -1132,13 +1171,52 @@ int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1132 btrfs_free_leaf_ref(root, ref); 1171 btrfs_free_leaf_ref(root, ref);
1133 } 1172 }
1134out: 1173out:
1135 return 0; 1174 return ret;
1136fail: 1175}
1137 WARN_ON(1); 1176
1138#if 0 1177int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1139 for (i =0; i < faili; i++) { 1178 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1179 u32 *nr_extents)
1180{
1181 u64 bytenr;
1182 u64 ref_root;
1183 u64 orig_root;
1184 u64 ref_generation;
1185 u64 orig_generation;
1186 u32 nritems;
1187 u32 nr_file_extents = 0;
1188 struct btrfs_key key;
1189 struct btrfs_file_extent_item *fi;
1190 int i;
1191 int level;
1192 int ret = 0;
1193 int faili = 0;
1194 int (*process_func)(struct btrfs_trans_handle *, struct btrfs_root *,
1195 u64, u64, u64, u64, u64, u64, u64, u64, u64);
1196
1197 ref_root = btrfs_header_owner(buf);
1198 ref_generation = btrfs_header_generation(buf);
1199 orig_root = btrfs_header_owner(orig_buf);
1200 orig_generation = btrfs_header_generation(orig_buf);
1201
1202 nritems = btrfs_header_nritems(buf);
1203 level = btrfs_header_level(buf);
1204
1205 if (root->ref_cows) {
1206 process_func = __btrfs_inc_extent_ref;
1207 } else {
1208 if (level == 0 &&
1209 root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID)
1210 goto out;
1211 if (level != 0 &&
1212 root->root_key.objectid == BTRFS_TREE_LOG_OBJECTID)
1213 goto out;
1214 process_func = __btrfs_update_extent_ref;
1215 }
1216
1217 for (i = 0; i < nritems; i++) {
1218 cond_resched();
1140 if (level == 0) { 1219 if (level == 0) {
1141 u64 disk_bytenr;
1142 btrfs_item_key_to_cpu(buf, &key, i); 1220 btrfs_item_key_to_cpu(buf, &key, i);
1143 if (btrfs_key_type(&key) != BTRFS_EXTENT_DATA_KEY) 1221 if (btrfs_key_type(&key) != BTRFS_EXTENT_DATA_KEY)
1144 continue; 1222 continue;
@@ -1147,24 +1225,131 @@ fail:
1147 if (btrfs_file_extent_type(buf, fi) == 1225 if (btrfs_file_extent_type(buf, fi) ==
1148 BTRFS_FILE_EXTENT_INLINE) 1226 BTRFS_FILE_EXTENT_INLINE)
1149 continue; 1227 continue;
1150 disk_bytenr = btrfs_file_extent_disk_bytenr(buf, fi); 1228 bytenr = btrfs_file_extent_disk_bytenr(buf, fi);
1151 if (disk_bytenr == 0) 1229 if (bytenr == 0)
1152 continue; 1230 continue;
1153 err = btrfs_free_extent(trans, root, disk_bytenr, 1231
1154 btrfs_file_extent_disk_num_bytes(buf, 1232 nr_file_extents++;
1155 fi), 0); 1233
1156 BUG_ON(err); 1234 maybe_lock_mutex(root);
1235 ret = process_func(trans, root, bytenr,
1236 orig_buf->start, buf->start,
1237 orig_root, ref_root,
1238 orig_generation, ref_generation,
1239 key.objectid, key.offset);
1240 maybe_unlock_mutex(root);
1241
1242 if (ret) {
1243 faili = i;
1244 WARN_ON(1);
1245 goto fail;
1246 }
1157 } else { 1247 } else {
1158 bytenr = btrfs_node_blockptr(buf, i); 1248 bytenr = btrfs_node_blockptr(buf, i);
1159 err = btrfs_free_extent(trans, root, bytenr, 1249 maybe_lock_mutex(root);
1160 btrfs_level_size(root, level - 1), 0); 1250 ret = process_func(trans, root, bytenr,
1161 BUG_ON(err); 1251 orig_buf->start, buf->start,
1252 orig_root, ref_root,
1253 orig_generation, ref_generation,
1254 level - 1, 0);
1255 maybe_unlock_mutex(root);
1256 if (ret) {
1257 faili = i;
1258 WARN_ON(1);
1259 goto fail;
1260 }
1162 } 1261 }
1163 } 1262 }
1164#endif 1263out:
1264 if (nr_extents) {
1265 if (level == 0)
1266 *nr_extents = nr_file_extents;
1267 else
1268 *nr_extents = nritems;
1269 }
1270 return 0;
1271fail:
1272 WARN_ON(1);
1165 return ret; 1273 return ret;
1166} 1274}
1167 1275
1276int btrfs_update_ref(struct btrfs_trans_handle *trans,
1277 struct btrfs_root *root, struct extent_buffer *orig_buf,
1278 struct extent_buffer *buf, int start_slot, int nr)
1279
1280{
1281 u64 bytenr;
1282 u64 ref_root;
1283 u64 orig_root;
1284 u64 ref_generation;
1285 u64 orig_generation;
1286 struct btrfs_key key;
1287 struct btrfs_file_extent_item *fi;
1288 int i;
1289 int ret;
1290 int slot;
1291 int level;
1292
1293 BUG_ON(start_slot < 0);
1294 BUG_ON(start_slot + nr > btrfs_header_nritems(buf));
1295
1296 ref_root = btrfs_header_owner(buf);
1297 ref_generation = btrfs_header_generation(buf);
1298 orig_root = btrfs_header_owner(orig_buf);
1299 orig_generation = btrfs_header_generation(orig_buf);
1300 level = btrfs_header_level(buf);
1301
1302 if (!root->ref_cows) {
1303 if (level == 0 &&
1304 root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID)
1305 return 0;
1306 if (level != 0 &&
1307 root->root_key.objectid == BTRFS_TREE_LOG_OBJECTID)
1308 return 0;
1309 }
1310
1311 for (i = 0, slot = start_slot; i < nr; i++, slot++) {
1312 cond_resched();
1313 if (level == 0) {
1314 btrfs_item_key_to_cpu(buf, &key, slot);
1315 if (btrfs_key_type(&key) != BTRFS_EXTENT_DATA_KEY)
1316 continue;
1317 fi = btrfs_item_ptr(buf, slot,
1318 struct btrfs_file_extent_item);
1319 if (btrfs_file_extent_type(buf, fi) ==
1320 BTRFS_FILE_EXTENT_INLINE)
1321 continue;
1322 bytenr = btrfs_file_extent_disk_bytenr(buf, fi);
1323 if (bytenr == 0)
1324 continue;
1325 maybe_lock_mutex(root);
1326 ret = __btrfs_update_extent_ref(trans, root, bytenr,
1327 orig_buf->start, buf->start,
1328 orig_root, ref_root,
1329 orig_generation, ref_generation,
1330 key.objectid, key.offset);
1331 maybe_unlock_mutex(root);
1332 if (ret)
1333 goto fail;
1334 } else {
1335 bytenr = btrfs_node_blockptr(buf, slot);
1336 maybe_lock_mutex(root);
1337 ret = __btrfs_update_extent_ref(trans, root, bytenr,
1338 orig_buf->start, buf->start,
1339 orig_root, ref_root,
1340 orig_generation, ref_generation,
1341 level - 1, 0);
1342 maybe_unlock_mutex(root);
1343 if (ret)
1344 goto fail;
1345 }
1346 }
1347 return 0;
1348fail:
1349 WARN_ON(1);
1350 return -1;
1351}
1352
1168static int write_one_cache_group(struct btrfs_trans_handle *trans, 1353static int write_one_cache_group(struct btrfs_trans_handle *trans,
1169 struct btrfs_root *root, 1354 struct btrfs_root *root,
1170 struct btrfs_path *path, 1355 struct btrfs_path *path,
@@ -1539,19 +1724,18 @@ static int finish_current_insert(struct btrfs_trans_handle *trans,
1539{ 1724{
1540 u64 start; 1725 u64 start;
1541 u64 end; 1726 u64 end;
1727 u64 priv;
1542 struct btrfs_fs_info *info = extent_root->fs_info; 1728 struct btrfs_fs_info *info = extent_root->fs_info;
1543 struct extent_buffer *eb;
1544 struct btrfs_path *path; 1729 struct btrfs_path *path;
1545 struct btrfs_key ins; 1730 struct btrfs_extent_ref *ref;
1546 struct btrfs_disk_key first; 1731 struct pending_extent_op *extent_op;
1732 struct btrfs_key key;
1547 struct btrfs_extent_item extent_item; 1733 struct btrfs_extent_item extent_item;
1548 int ret; 1734 int ret;
1549 int level;
1550 int err = 0; 1735 int err = 0;
1551 1736
1552 WARN_ON(!mutex_is_locked(&extent_root->fs_info->alloc_mutex)); 1737 WARN_ON(!mutex_is_locked(&extent_root->fs_info->alloc_mutex));
1553 btrfs_set_stack_extent_refs(&extent_item, 1); 1738 btrfs_set_stack_extent_refs(&extent_item, 1);
1554 btrfs_set_key_type(&ins, BTRFS_EXTENT_ITEM_KEY);
1555 path = btrfs_alloc_path(); 1739 path = btrfs_alloc_path();
1556 1740
1557 while(1) { 1741 while(1) {
@@ -1560,37 +1744,54 @@ static int finish_current_insert(struct btrfs_trans_handle *trans,
1560 if (ret) 1744 if (ret)
1561 break; 1745 break;
1562 1746
1563 ins.objectid = start; 1747 ret = get_state_private(&info->extent_ins, start, &priv);
1564 ins.offset = end + 1 - start; 1748 BUG_ON(ret);
1565 err = btrfs_insert_item(trans, extent_root, &ins, 1749 extent_op = (struct pending_extent_op *)(unsigned long)priv;
1750
1751 if (extent_op->type == PENDING_EXTENT_INSERT) {
1752 key.objectid = start;
1753 key.offset = end + 1 - start;
1754 key.type = BTRFS_EXTENT_ITEM_KEY;
1755 err = btrfs_insert_item(trans, extent_root, &key,
1566 &extent_item, sizeof(extent_item)); 1756 &extent_item, sizeof(extent_item));
1567 clear_extent_bits(&info->extent_ins, start, end, EXTENT_LOCKED, 1757 BUG_ON(err);
1568 GFP_NOFS);
1569 1758
1570 eb = btrfs_find_create_tree_block(extent_root, ins.objectid, 1759 clear_extent_bits(&info->extent_ins, start, end,
1571 ins.offset); 1760 EXTENT_LOCKED, GFP_NOFS);
1572 1761
1573 if (!btrfs_buffer_uptodate(eb, trans->transid)) 1762 err = insert_extent_backref(trans, extent_root, path,
1574 btrfs_read_buffer(eb, trans->transid); 1763 start, extent_op->parent,
1764 extent_root->root_key.objectid,
1765 extent_op->generation,
1766 extent_op->level, 0);
1767 BUG_ON(err);
1768 } else if (extent_op->type == PENDING_BACKREF_UPDATE) {
1769 err = lookup_extent_backref(trans, extent_root, path,
1770 start, extent_op->orig_parent,
1771 extent_root->root_key.objectid,
1772 extent_op->orig_generation, 0);
1773 BUG_ON(err);
1575 1774
1576 btrfs_tree_lock(eb); 1775 clear_extent_bits(&info->extent_ins, start, end,
1577 level = btrfs_header_level(eb); 1776 EXTENT_LOCKED, GFP_NOFS);
1578 if (level == 0) { 1777
1579 btrfs_item_key(eb, &first, 0); 1778 key.objectid = start;
1779 key.offset = extent_op->parent;
1780 key.type = BTRFS_EXTENT_REF_KEY;
1781 err = btrfs_set_item_key_safe(trans, extent_root, path,
1782 &key);
1783 BUG_ON(err);
1784 ref = btrfs_item_ptr(path->nodes[0], path->slots[0],
1785 struct btrfs_extent_ref);
1786 btrfs_set_ref_generation(path->nodes[0], ref,
1787 extent_op->generation);
1788 btrfs_mark_buffer_dirty(path->nodes[0]);
1789 btrfs_release_path(extent_root, path);
1580 } else { 1790 } else {
1581 btrfs_node_key(eb, &first, 0); 1791 BUG_ON(1);
1582 } 1792 }
1583 btrfs_tree_unlock(eb); 1793 kfree(extent_op);
1584 free_extent_buffer(eb); 1794
1585 /*
1586 * the first key is just a hint, so the race we've created
1587 * against reading it is fine
1588 */
1589 err = btrfs_insert_extent_backref(trans, extent_root, path,
1590 start, extent_root->root_key.objectid,
1591 0, level,
1592 btrfs_disk_key_objectid(&first));
1593 BUG_ON(err);
1594 if (need_resched()) { 1795 if (need_resched()) {
1595 mutex_unlock(&extent_root->fs_info->alloc_mutex); 1796 mutex_unlock(&extent_root->fs_info->alloc_mutex);
1596 cond_resched(); 1797 cond_resched();
@@ -1601,52 +1802,44 @@ static int finish_current_insert(struct btrfs_trans_handle *trans,
1601 return 0; 1802 return 0;
1602} 1803}
1603 1804
1604static int pin_down_bytes(struct btrfs_root *root, u64 bytenr, u32 num_bytes, 1805static int pin_down_bytes(struct btrfs_trans_handle *trans,
1605 int is_data, int pending) 1806 struct btrfs_root *root,
1807 u64 bytenr, u64 num_bytes, int is_data)
1606{ 1808{
1607 int err = 0; 1809 int err = 0;
1810 struct extent_buffer *buf;
1608 1811
1609 WARN_ON(!mutex_is_locked(&root->fs_info->alloc_mutex)); 1812 WARN_ON(!mutex_is_locked(&root->fs_info->alloc_mutex));
1610 if (!pending) { 1813 if (is_data)
1611 struct extent_buffer *buf; 1814 goto pinit;
1612 1815
1613 if (is_data) 1816 buf = btrfs_find_tree_block(root, bytenr, num_bytes);
1614 goto pinit; 1817 if (!buf)
1615 1818 goto pinit;
1616 buf = btrfs_find_tree_block(root, bytenr, num_bytes); 1819
1617 if (buf) { 1820 /* we can reuse a block if it hasn't been written
1618 /* we can reuse a block if it hasn't been written 1821 * and it is from this transaction. We can't
1619 * and it is from this transaction. We can't 1822 * reuse anything from the tree log root because
1620 * reuse anything from the tree log root because 1823 * it has tiny sub-transactions.
1621 * it has tiny sub-transactions. 1824 */
1622 */ 1825 if (btrfs_buffer_uptodate(buf, 0) &&
1623 if (btrfs_buffer_uptodate(buf, 0) && 1826 btrfs_try_tree_lock(buf)) {
1624 btrfs_try_tree_lock(buf)) { 1827 u64 header_owner = btrfs_header_owner(buf);
1625 u64 transid = 1828 u64 header_transid = btrfs_header_generation(buf);
1626 root->fs_info->running_transaction->transid; 1829 if (header_owner != BTRFS_TREE_LOG_OBJECTID &&
1627 u64 header_transid = 1830 header_transid == trans->transid &&
1628 btrfs_header_generation(buf); 1831 !btrfs_header_flag(buf, BTRFS_HEADER_FLAG_WRITTEN)) {
1629 if (btrfs_header_owner(buf) != 1832 clean_tree_block(NULL, root, buf);
1630 BTRFS_TREE_LOG_OBJECTID && 1833 btrfs_tree_unlock(buf);
1631 header_transid == transid &&
1632 !btrfs_header_flag(buf,
1633 BTRFS_HEADER_FLAG_WRITTEN)) {
1634 clean_tree_block(NULL, root, buf);
1635 btrfs_tree_unlock(buf);
1636 free_extent_buffer(buf);
1637 return 1;
1638 }
1639 btrfs_tree_unlock(buf);
1640 }
1641 free_extent_buffer(buf); 1834 free_extent_buffer(buf);
1835 return 1;
1642 } 1836 }
1643pinit: 1837 btrfs_tree_unlock(buf);
1644 btrfs_update_pinned_extents(root, bytenr, num_bytes, 1);
1645 } else {
1646 set_extent_bits(&root->fs_info->pending_del,
1647 bytenr, bytenr + num_bytes - 1,
1648 EXTENT_LOCKED, GFP_NOFS);
1649 } 1838 }
1839 free_extent_buffer(buf);
1840pinit:
1841 btrfs_update_pinned_extents(root, bytenr, num_bytes, 1);
1842
1650 BUG_ON(err < 0); 1843 BUG_ON(err < 0);
1651 return 0; 1844 return 0;
1652} 1845}
@@ -1654,11 +1847,12 @@ pinit:
1654/* 1847/*
1655 * remove an extent from the root, returns 0 on success 1848 * remove an extent from the root, returns 0 on success
1656 */ 1849 */
1657static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root 1850static int __free_extent(struct btrfs_trans_handle *trans,
1658 *root, u64 bytenr, u64 num_bytes, 1851 struct btrfs_root *root,
1852 u64 bytenr, u64 num_bytes, u64 parent,
1659 u64 root_objectid, u64 ref_generation, 1853 u64 root_objectid, u64 ref_generation,
1660 u64 owner_objectid, u64 owner_offset, int pin, 1854 u64 owner_objectid, u64 owner_offset,
1661 int mark_free) 1855 int pin, int mark_free)
1662{ 1856{
1663 struct btrfs_path *path; 1857 struct btrfs_path *path;
1664 struct btrfs_key key; 1858 struct btrfs_key key;
@@ -1681,10 +1875,8 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1681 return -ENOMEM; 1875 return -ENOMEM;
1682 1876
1683 path->reada = 1; 1877 path->reada = 1;
1684 ret = lookup_extent_backref(trans, extent_root, path, 1878 ret = lookup_extent_backref(trans, extent_root, path, bytenr, parent,
1685 bytenr, root_objectid, 1879 root_objectid, ref_generation, 1);
1686 ref_generation,
1687 owner_objectid, owner_offset, 1);
1688 if (ret == 0) { 1880 if (ret == 0) {
1689 struct btrfs_key found_key; 1881 struct btrfs_key found_key;
1690 extent_slot = path->slots[0]; 1882 extent_slot = path->slots[0];
@@ -1702,8 +1894,15 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1702 if (path->slots[0] - extent_slot > 5) 1894 if (path->slots[0] - extent_slot > 5)
1703 break; 1895 break;
1704 } 1896 }
1705 if (!found_extent) 1897 if (!found_extent) {
1706 ret = btrfs_del_item(trans, extent_root, path); 1898 ret = remove_extent_backref(trans, extent_root, path);
1899 BUG_ON(ret);
1900 btrfs_release_path(extent_root, path);
1901 ret = btrfs_search_slot(trans, extent_root,
1902 &key, path, -1, 1);
1903 BUG_ON(ret);
1904 extent_slot = path->slots[0];
1905 }
1707 } else { 1906 } else {
1708 btrfs_print_leaf(extent_root, path->nodes[0]); 1907 btrfs_print_leaf(extent_root, path->nodes[0]);
1709 WARN_ON(1); 1908 WARN_ON(1);
@@ -1712,14 +1911,6 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1712 root_objectid, ref_generation, owner_objectid, 1911 root_objectid, ref_generation, owner_objectid,
1713 owner_offset); 1912 owner_offset);
1714 } 1913 }
1715 if (!found_extent) {
1716 btrfs_release_path(extent_root, path);
1717 ret = btrfs_search_slot(trans, extent_root, &key, path, -1, 1);
1718 if (ret < 0)
1719 return ret;
1720 BUG_ON(ret);
1721 extent_slot = path->slots[0];
1722 }
1723 1914
1724 leaf = path->nodes[0]; 1915 leaf = path->nodes[0];
1725 ei = btrfs_item_ptr(leaf, extent_slot, 1916 ei = btrfs_item_ptr(leaf, extent_slot,
@@ -1732,6 +1923,10 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1732 btrfs_mark_buffer_dirty(leaf); 1923 btrfs_mark_buffer_dirty(leaf);
1733 1924
1734 if (refs == 0 && found_extent && path->slots[0] == extent_slot + 1) { 1925 if (refs == 0 && found_extent && path->slots[0] == extent_slot + 1) {
1926 struct btrfs_extent_ref *ref;
1927 ref = btrfs_item_ptr(leaf, path->slots[0],
1928 struct btrfs_extent_ref);
1929 BUG_ON(btrfs_ref_num_refs(leaf, ref) != 1);
1735 /* if the back ref and the extent are next to each other 1930 /* if the back ref and the extent are next to each other
1736 * they get deleted below in one shot 1931 * they get deleted below in one shot
1737 */ 1932 */
@@ -1739,15 +1934,13 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1739 num_to_del = 2; 1934 num_to_del = 2;
1740 } else if (found_extent) { 1935 } else if (found_extent) {
1741 /* otherwise delete the extent back ref */ 1936 /* otherwise delete the extent back ref */
1742 ret = btrfs_del_item(trans, extent_root, path); 1937 ret = remove_extent_backref(trans, extent_root, path);
1743 BUG_ON(ret); 1938 BUG_ON(ret);
1744 /* if refs are 0, we need to setup the path for deletion */ 1939 /* if refs are 0, we need to setup the path for deletion */
1745 if (refs == 0) { 1940 if (refs == 0) {
1746 btrfs_release_path(extent_root, path); 1941 btrfs_release_path(extent_root, path);
1747 ret = btrfs_search_slot(trans, extent_root, &key, path, 1942 ret = btrfs_search_slot(trans, extent_root, &key, path,
1748 -1, 1); 1943 -1, 1);
1749 if (ret < 0)
1750 return ret;
1751 BUG_ON(ret); 1944 BUG_ON(ret);
1752 } 1945 }
1753 } 1946 }
@@ -1761,8 +1954,8 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1761#endif 1954#endif
1762 1955
1763 if (pin) { 1956 if (pin) {
1764 ret = pin_down_bytes(root, bytenr, num_bytes, 1957 ret = pin_down_bytes(trans, root, bytenr, num_bytes,
1765 owner_objectid >= BTRFS_FIRST_FREE_OBJECTID, 0); 1958 owner_objectid >= BTRFS_FIRST_FREE_OBJECTID);
1766 if (ret > 0) 1959 if (ret > 0)
1767 mark_free = 1; 1960 mark_free = 1;
1768 BUG_ON(ret < 0); 1961 BUG_ON(ret < 0);
@@ -1781,9 +1974,7 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1781 root_used - num_bytes); 1974 root_used - num_bytes);
1782 ret = btrfs_del_items(trans, extent_root, path, path->slots[0], 1975 ret = btrfs_del_items(trans, extent_root, path, path->slots[0],
1783 num_to_del); 1976 num_to_del);
1784 if (ret) { 1977 BUG_ON(ret);
1785 return ret;
1786 }
1787 ret = update_block_group(trans, root, bytenr, num_bytes, 0, 1978 ret = update_block_group(trans, root, bytenr, num_bytes, 0,
1788 mark_free); 1979 mark_free);
1789 BUG_ON(ret); 1980 BUG_ON(ret);
@@ -1822,33 +2013,61 @@ static int del_pending_extents(struct btrfs_trans_handle *trans, struct
1822{ 2013{
1823 int ret; 2014 int ret;
1824 int err = 0; 2015 int err = 0;
2016 int mark_free = 0;
1825 u64 start; 2017 u64 start;
1826 u64 end; 2018 u64 end;
2019 u64 priv;
1827 struct extent_io_tree *pending_del; 2020 struct extent_io_tree *pending_del;
1828 struct extent_io_tree *pinned_extents; 2021 struct extent_io_tree *extent_ins;
2022 struct pending_extent_op *extent_op;
1829 2023
1830 WARN_ON(!mutex_is_locked(&extent_root->fs_info->alloc_mutex)); 2024 WARN_ON(!mutex_is_locked(&extent_root->fs_info->alloc_mutex));
2025 extent_ins = &extent_root->fs_info->extent_ins;
1831 pending_del = &extent_root->fs_info->pending_del; 2026 pending_del = &extent_root->fs_info->pending_del;
1832 pinned_extents = &extent_root->fs_info->pinned_extents;
1833 2027
1834 while(1) { 2028 while(1) {
1835 ret = find_first_extent_bit(pending_del, 0, &start, &end, 2029 ret = find_first_extent_bit(pending_del, 0, &start, &end,
1836 EXTENT_LOCKED); 2030 EXTENT_LOCKED);
1837 if (ret) 2031 if (ret)
1838 break; 2032 break;
2033
2034 ret = get_state_private(pending_del, start, &priv);
2035 BUG_ON(ret);
2036 extent_op = (struct pending_extent_op *)(unsigned long)priv;
2037
1839 clear_extent_bits(pending_del, start, end, EXTENT_LOCKED, 2038 clear_extent_bits(pending_del, start, end, EXTENT_LOCKED,
1840 GFP_NOFS); 2039 GFP_NOFS);
1841 if (!test_range_bit(&extent_root->fs_info->extent_ins, 2040
1842 start, end, EXTENT_LOCKED, 0)) { 2041 ret = pin_down_bytes(trans, extent_root, start,
1843 btrfs_update_pinned_extents(extent_root, start, 2042 end + 1 - start, 0);
1844 end + 1 - start, 1); 2043 mark_free = ret > 0;
2044 if (!test_range_bit(extent_ins, start, end,
2045 EXTENT_LOCKED, 0)) {
2046free_extent:
1845 ret = __free_extent(trans, extent_root, 2047 ret = __free_extent(trans, extent_root,
1846 start, end + 1 - start, 2048 start, end + 1 - start,
1847 extent_root->root_key.objectid, 2049 extent_op->orig_parent,
1848 0, 0, 0, 0, 0); 2050 extent_root->root_key.objectid,
2051 extent_op->orig_generation,
2052 extent_op->level, 0, 0, mark_free);
2053 kfree(extent_op);
1849 } else { 2054 } else {
1850 clear_extent_bits(&extent_root->fs_info->extent_ins, 2055 kfree(extent_op);
1851 start, end, EXTENT_LOCKED, GFP_NOFS); 2056 ret = get_state_private(extent_ins, start, &priv);
2057 BUG_ON(ret);
2058 extent_op = (struct pending_extent_op *)
2059 (unsigned long)priv;
2060
2061 clear_extent_bits(extent_ins, start, end,
2062 EXTENT_LOCKED, GFP_NOFS);
2063
2064 if (extent_op->type == PENDING_BACKREF_UPDATE)
2065 goto free_extent;
2066
2067 ret = update_block_group(trans, extent_root, start,
2068 end + 1 - start, 0, mark_free);
2069 BUG_ON(ret);
2070 kfree(extent_op);
1852 } 2071 }
1853 if (ret) 2072 if (ret)
1854 err = ret; 2073 err = ret;
@@ -1866,21 +2085,36 @@ static int del_pending_extents(struct btrfs_trans_handle *trans, struct
1866 * remove an extent from the root, returns 0 on success 2085 * remove an extent from the root, returns 0 on success
1867 */ 2086 */
1868static int __btrfs_free_extent(struct btrfs_trans_handle *trans, 2087static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
1869 struct btrfs_root *root, u64 bytenr, 2088 struct btrfs_root *root,
1870 u64 num_bytes, u64 root_objectid, 2089 u64 bytenr, u64 num_bytes, u64 parent,
1871 u64 ref_generation, u64 owner_objectid, 2090 u64 root_objectid, u64 ref_generation,
1872 u64 owner_offset, int pin) 2091 u64 owner_objectid, u64 owner_offset, int pin)
1873{ 2092{
1874 struct btrfs_root *extent_root = root->fs_info->extent_root; 2093 struct btrfs_root *extent_root = root->fs_info->extent_root;
1875 int pending_ret; 2094 int pending_ret;
1876 int ret; 2095 int ret;
1877 2096
1878 WARN_ON(num_bytes < root->sectorsize); 2097 WARN_ON(num_bytes < root->sectorsize);
1879 if (!root->ref_cows)
1880 ref_generation = 0;
1881
1882 if (root == extent_root) { 2098 if (root == extent_root) {
1883 pin_down_bytes(root, bytenr, num_bytes, 0, 1); 2099 struct pending_extent_op *extent_op;
2100
2101 extent_op = kmalloc(sizeof(*extent_op), GFP_NOFS);
2102 BUG_ON(!extent_op);
2103
2104 extent_op->type = PENDING_EXTENT_DELETE;
2105 extent_op->bytenr = bytenr;
2106 extent_op->num_bytes = num_bytes;
2107 extent_op->parent = parent;
2108 extent_op->orig_parent = parent;
2109 extent_op->generation = ref_generation;
2110 extent_op->orig_generation = ref_generation;
2111 extent_op->level = (int)owner_objectid;
2112
2113 set_extent_bits(&root->fs_info->pending_del,
2114 bytenr, bytenr + num_bytes - 1,
2115 EXTENT_LOCKED, GFP_NOFS);
2116 set_state_private(&root->fs_info->pending_del,
2117 bytenr, (unsigned long)extent_op);
1884 return 0; 2118 return 0;
1885 } 2119 }
1886 /* if metadata always pin */ 2120 /* if metadata always pin */
@@ -1901,9 +2135,9 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
1901 if (ref_generation != trans->transid) 2135 if (ref_generation != trans->transid)
1902 pin = 1; 2136 pin = 1;
1903 2137
1904 ret = __free_extent(trans, root, bytenr, num_bytes, root_objectid, 2138 ret = __free_extent(trans, root, bytenr, num_bytes, parent,
1905 ref_generation, owner_objectid, owner_offset, 2139 root_objectid, ref_generation, owner_objectid,
1906 pin, pin == 0); 2140 owner_offset, pin, pin == 0);
1907 2141
1908 finish_current_insert(trans, root->fs_info->extent_root); 2142 finish_current_insert(trans, root->fs_info->extent_root);
1909 pending_ret = del_pending_extents(trans, root->fs_info->extent_root); 2143 pending_ret = del_pending_extents(trans, root->fs_info->extent_root);
@@ -1911,15 +2145,15 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
1911} 2145}
1912 2146
1913int btrfs_free_extent(struct btrfs_trans_handle *trans, 2147int btrfs_free_extent(struct btrfs_trans_handle *trans,
1914 struct btrfs_root *root, u64 bytenr, 2148 struct btrfs_root *root,
1915 u64 num_bytes, u64 root_objectid, 2149 u64 bytenr, u64 num_bytes, u64 parent,
1916 u64 ref_generation, u64 owner_objectid, 2150 u64 root_objectid, u64 ref_generation,
1917 u64 owner_offset, int pin) 2151 u64 owner_objectid, u64 owner_offset, int pin)
1918{ 2152{
1919 int ret; 2153 int ret;
1920 2154
1921 maybe_lock_mutex(root); 2155 maybe_lock_mutex(root);
1922 ret = __btrfs_free_extent(trans, root, bytenr, num_bytes, 2156 ret = __btrfs_free_extent(trans, root, bytenr, num_bytes, parent,
1923 root_objectid, ref_generation, 2157 root_objectid, ref_generation,
1924 owner_objectid, owner_offset, pin); 2158 owner_objectid, owner_offset, pin);
1925 maybe_unlock_mutex(root); 2159 maybe_unlock_mutex(root);
@@ -2271,7 +2505,7 @@ int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2271} 2505}
2272 2506
2273static int __btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans, 2507static int __btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
2274 struct btrfs_root *root, 2508 struct btrfs_root *root, u64 parent,
2275 u64 root_objectid, u64 ref_generation, 2509 u64 root_objectid, u64 ref_generation,
2276 u64 owner, u64 owner_offset, 2510 u64 owner, u64 owner_offset,
2277 struct btrfs_key *ins) 2511 struct btrfs_key *ins)
@@ -2289,6 +2523,9 @@ static int __btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
2289 struct btrfs_path *path; 2523 struct btrfs_path *path;
2290 struct btrfs_key keys[2]; 2524 struct btrfs_key keys[2];
2291 2525
2526 if (parent == 0)
2527 parent = ins->objectid;
2528
2292 /* block accounting for super block */ 2529 /* block accounting for super block */
2293 spin_lock_irq(&info->delalloc_lock); 2530 spin_lock_irq(&info->delalloc_lock);
2294 super_used = btrfs_super_bytes_used(&info->super_copy); 2531 super_used = btrfs_super_bytes_used(&info->super_copy);
@@ -2300,17 +2537,32 @@ static int __btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
2300 btrfs_set_root_used(&root->root_item, root_used + num_bytes); 2537 btrfs_set_root_used(&root->root_item, root_used + num_bytes);
2301 2538
2302 if (root == extent_root) { 2539 if (root == extent_root) {
2540 struct pending_extent_op *extent_op;
2541
2542 extent_op = kmalloc(sizeof(*extent_op), GFP_NOFS);
2543 BUG_ON(!extent_op);
2544
2545 extent_op->type = PENDING_EXTENT_INSERT;
2546 extent_op->bytenr = ins->objectid;
2547 extent_op->num_bytes = ins->offset;
2548 extent_op->parent = parent;
2549 extent_op->orig_parent = 0;
2550 extent_op->generation = ref_generation;
2551 extent_op->orig_generation = 0;
2552 extent_op->level = (int)owner;
2553
2303 set_extent_bits(&root->fs_info->extent_ins, ins->objectid, 2554 set_extent_bits(&root->fs_info->extent_ins, ins->objectid,
2304 ins->objectid + ins->offset - 1, 2555 ins->objectid + ins->offset - 1,
2305 EXTENT_LOCKED, GFP_NOFS); 2556 EXTENT_LOCKED, GFP_NOFS);
2557 set_state_private(&root->fs_info->extent_ins,
2558 ins->objectid, (unsigned long)extent_op);
2306 goto update_block; 2559 goto update_block;
2307 } 2560 }
2308 2561
2309 memcpy(&keys[0], ins, sizeof(*ins)); 2562 memcpy(&keys[0], ins, sizeof(*ins));
2310 keys[1].offset = hash_extent_ref(root_objectid, ref_generation,
2311 owner, owner_offset);
2312 keys[1].objectid = ins->objectid; 2563 keys[1].objectid = ins->objectid;
2313 keys[1].type = BTRFS_EXTENT_REF_KEY; 2564 keys[1].type = BTRFS_EXTENT_REF_KEY;
2565 keys[1].offset = parent;
2314 sizes[0] = sizeof(*extent_item); 2566 sizes[0] = sizeof(*extent_item);
2315 sizes[1] = sizeof(*ref); 2567 sizes[1] = sizeof(*ref);
2316 2568
@@ -2331,6 +2583,7 @@ static int __btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
2331 btrfs_set_ref_generation(path->nodes[0], ref, ref_generation); 2583 btrfs_set_ref_generation(path->nodes[0], ref, ref_generation);
2332 btrfs_set_ref_objectid(path->nodes[0], ref, owner); 2584 btrfs_set_ref_objectid(path->nodes[0], ref, owner);
2333 btrfs_set_ref_offset(path->nodes[0], ref, owner_offset); 2585 btrfs_set_ref_offset(path->nodes[0], ref, owner_offset);
2586 btrfs_set_ref_num_refs(path->nodes[0], ref, 1);
2334 2587
2335 btrfs_mark_buffer_dirty(path->nodes[0]); 2588 btrfs_mark_buffer_dirty(path->nodes[0]);
2336 2589
@@ -2359,7 +2612,7 @@ out:
2359} 2612}
2360 2613
2361int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans, 2614int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
2362 struct btrfs_root *root, 2615 struct btrfs_root *root, u64 parent,
2363 u64 root_objectid, u64 ref_generation, 2616 u64 root_objectid, u64 ref_generation,
2364 u64 owner, u64 owner_offset, 2617 u64 owner, u64 owner_offset,
2365 struct btrfs_key *ins) 2618 struct btrfs_key *ins)
@@ -2369,9 +2622,9 @@ int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
2369 if (root_objectid == BTRFS_TREE_LOG_OBJECTID) 2622 if (root_objectid == BTRFS_TREE_LOG_OBJECTID)
2370 return 0; 2623 return 0;
2371 maybe_lock_mutex(root); 2624 maybe_lock_mutex(root);
2372 ret = __btrfs_alloc_reserved_extent(trans, root, root_objectid, 2625 ret = __btrfs_alloc_reserved_extent(trans, root, parent,
2373 ref_generation, owner, 2626 root_objectid, ref_generation,
2374 owner_offset, ins); 2627 owner, owner_offset, ins);
2375 maybe_unlock_mutex(root); 2628 maybe_unlock_mutex(root);
2376 return ret; 2629 return ret;
2377} 2630}
@@ -2382,7 +2635,7 @@ int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
2382 * space cache bits as well 2635 * space cache bits as well
2383 */ 2636 */
2384int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans, 2637int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
2385 struct btrfs_root *root, 2638 struct btrfs_root *root, u64 parent,
2386 u64 root_objectid, u64 ref_generation, 2639 u64 root_objectid, u64 ref_generation,
2387 u64 owner, u64 owner_offset, 2640 u64 owner, u64 owner_offset,
2388 struct btrfs_key *ins) 2641 struct btrfs_key *ins)
@@ -2396,10 +2649,9 @@ int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
2396 2649
2397 ret = btrfs_remove_free_space(block_group, ins->objectid, ins->offset); 2650 ret = btrfs_remove_free_space(block_group, ins->objectid, ins->offset);
2398 BUG_ON(ret); 2651 BUG_ON(ret);
2399 2652 ret = __btrfs_alloc_reserved_extent(trans, root, parent,
2400 ret = __btrfs_alloc_reserved_extent(trans, root, root_objectid, 2653 root_objectid, ref_generation,
2401 ref_generation, owner, 2654 owner, owner_offset, ins);
2402 owner_offset, ins);
2403 maybe_unlock_mutex(root); 2655 maybe_unlock_mutex(root);
2404 return ret; 2656 return ret;
2405} 2657}
@@ -2413,9 +2665,9 @@ int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
2413 */ 2665 */
2414int btrfs_alloc_extent(struct btrfs_trans_handle *trans, 2666int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2415 struct btrfs_root *root, 2667 struct btrfs_root *root,
2416 u64 num_bytes, u64 min_alloc_size, 2668 u64 num_bytes, u64 parent, u64 min_alloc_size,
2417 u64 root_objectid, u64 ref_generation, 2669 u64 root_objectid, u64 ref_generation,
2418 u64 owner, u64 owner_offset, 2670 u64 owner_objectid, u64 owner_offset,
2419 u64 empty_size, u64 hint_byte, 2671 u64 empty_size, u64 hint_byte,
2420 u64 search_end, struct btrfs_key *ins, u64 data) 2672 u64 search_end, struct btrfs_key *ins, u64 data)
2421{ 2673{
@@ -2428,9 +2680,9 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2428 search_end, ins, data); 2680 search_end, ins, data);
2429 BUG_ON(ret); 2681 BUG_ON(ret);
2430 if (root_objectid != BTRFS_TREE_LOG_OBJECTID) { 2682 if (root_objectid != BTRFS_TREE_LOG_OBJECTID) {
2431 ret = __btrfs_alloc_reserved_extent(trans, root, root_objectid, 2683 ret = __btrfs_alloc_reserved_extent(trans, root, parent,
2432 ref_generation, owner, 2684 root_objectid, ref_generation,
2433 owner_offset, ins); 2685 owner_objectid, owner_offset, ins);
2434 BUG_ON(ret); 2686 BUG_ON(ret);
2435 2687
2436 } 2688 }
@@ -2468,10 +2720,9 @@ struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2468 */ 2720 */
2469struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, 2721struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2470 struct btrfs_root *root, 2722 struct btrfs_root *root,
2471 u32 blocksize, 2723 u32 blocksize, u64 parent,
2472 u64 root_objectid, 2724 u64 root_objectid,
2473 u64 ref_generation, 2725 u64 ref_generation,
2474 u64 first_objectid,
2475 int level, 2726 int level,
2476 u64 hint, 2727 u64 hint,
2477 u64 empty_size) 2728 u64 empty_size)
@@ -2480,10 +2731,9 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2480 int ret; 2731 int ret;
2481 struct extent_buffer *buf; 2732 struct extent_buffer *buf;
2482 2733
2483 ret = btrfs_alloc_extent(trans, root, blocksize, blocksize, 2734 ret = btrfs_alloc_extent(trans, root, blocksize, parent, blocksize,
2484 root_objectid, ref_generation, 2735 root_objectid, ref_generation, level, 0,
2485 level, first_objectid, empty_size, hint, 2736 empty_size, hint, (u64)-1, &ins, 0);
2486 (u64)-1, &ins, 0);
2487 if (ret) { 2737 if (ret) {
2488 BUG_ON(ret > 0); 2738 BUG_ON(ret > 0);
2489 return ERR_PTR(ret); 2739 return ERR_PTR(ret);
@@ -2531,15 +2781,14 @@ int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
2531 mutex_lock(&root->fs_info->alloc_mutex); 2781 mutex_lock(&root->fs_info->alloc_mutex);
2532 ret = __btrfs_free_extent(trans, root, disk_bytenr, 2782 ret = __btrfs_free_extent(trans, root, disk_bytenr,
2533 btrfs_file_extent_disk_num_bytes(leaf, fi), 2783 btrfs_file_extent_disk_num_bytes(leaf, fi),
2534 leaf_owner, leaf_generation, 2784 leaf->start, leaf_owner, leaf_generation,
2535 key.objectid, key.offset, 0); 2785 key.objectid, key.offset, 0);
2536 mutex_unlock(&root->fs_info->alloc_mutex); 2786 mutex_unlock(&root->fs_info->alloc_mutex);
2787 BUG_ON(ret);
2537 2788
2538 atomic_inc(&root->fs_info->throttle_gen); 2789 atomic_inc(&root->fs_info->throttle_gen);
2539 wake_up(&root->fs_info->transaction_throttle); 2790 wake_up(&root->fs_info->transaction_throttle);
2540 cond_resched(); 2791 cond_resched();
2541
2542 BUG_ON(ret);
2543 } 2792 }
2544 return 0; 2793 return 0;
2545} 2794}
@@ -2554,10 +2803,10 @@ static int noinline cache_drop_leaf_ref(struct btrfs_trans_handle *trans,
2554 2803
2555 for (i = 0; i < ref->nritems; i++) { 2804 for (i = 0; i < ref->nritems; i++) {
2556 mutex_lock(&root->fs_info->alloc_mutex); 2805 mutex_lock(&root->fs_info->alloc_mutex);
2557 ret = __btrfs_free_extent(trans, root, 2806 ret = __btrfs_free_extent(trans, root, info->bytenr,
2558 info->bytenr, info->num_bytes, 2807 info->num_bytes, ref->bytenr,
2559 ref->owner, ref->generation, 2808 ref->owner, ref->generation,
2560 info->objectid, info->offset, 0); 2809 info->objectid, info->offset, 0);
2561 mutex_unlock(&root->fs_info->alloc_mutex); 2810 mutex_unlock(&root->fs_info->alloc_mutex);
2562 2811
2563 atomic_inc(&root->fs_info->throttle_gen); 2812 atomic_inc(&root->fs_info->throttle_gen);
@@ -2576,7 +2825,7 @@ int drop_snap_lookup_refcount(struct btrfs_root *root, u64 start, u64 len,
2576{ 2825{
2577 int ret; 2826 int ret;
2578 2827
2579 ret = lookup_extent_ref(NULL, root, start, len, refs); 2828 ret = btrfs_lookup_extent_ref(NULL, root, start, len, refs);
2580 BUG_ON(ret); 2829 BUG_ON(ret);
2581 2830
2582#if 0 // some debugging code in case we see problems here 2831#if 0 // some debugging code in case we see problems here
@@ -2672,8 +2921,8 @@ static int noinline walk_down_tree(struct btrfs_trans_handle *trans,
2672 2921
2673 mutex_lock(&root->fs_info->alloc_mutex); 2922 mutex_lock(&root->fs_info->alloc_mutex);
2674 ret = __btrfs_free_extent(trans, root, bytenr, 2923 ret = __btrfs_free_extent(trans, root, bytenr,
2675 blocksize, root_owner, 2924 blocksize, parent->start,
2676 root_gen, 0, 0, 1); 2925 root_owner, root_gen, 0, 0, 1);
2677 BUG_ON(ret); 2926 BUG_ON(ret);
2678 mutex_unlock(&root->fs_info->alloc_mutex); 2927 mutex_unlock(&root->fs_info->alloc_mutex);
2679 2928
@@ -2690,8 +2939,6 @@ static int noinline walk_down_tree(struct btrfs_trans_handle *trans,
2690 * So, we don't need to check it again 2939 * So, we don't need to check it again
2691 */ 2940 */
2692 if (*level == 1) { 2941 if (*level == 1) {
2693 struct btrfs_key key;
2694 btrfs_node_key_to_cpu(cur, &key, path->slots[*level]);
2695 ref = btrfs_lookup_leaf_ref(root, bytenr); 2942 ref = btrfs_lookup_leaf_ref(root, bytenr);
2696 if (ref) { 2943 if (ref) {
2697 ret = cache_drop_leaf_ref(trans, root, ref); 2944 ret = cache_drop_leaf_ref(trans, root, ref);
@@ -2750,12 +2997,13 @@ out:
2750 2997
2751 mutex_lock(&root->fs_info->alloc_mutex); 2998 mutex_lock(&root->fs_info->alloc_mutex);
2752 ret = __btrfs_free_extent(trans, root, bytenr, blocksize, 2999 ret = __btrfs_free_extent(trans, root, bytenr, blocksize,
2753 root_owner, root_gen, 0, 0, 1); 3000 parent->start, root_owner, root_gen,
3001 0, 0, 1);
3002 mutex_unlock(&root->fs_info->alloc_mutex);
2754 free_extent_buffer(path->nodes[*level]); 3003 free_extent_buffer(path->nodes[*level]);
2755 path->nodes[*level] = NULL; 3004 path->nodes[*level] = NULL;
2756 *level += 1; 3005 *level += 1;
2757 BUG_ON(ret); 3006 BUG_ON(ret);
2758 mutex_unlock(&root->fs_info->alloc_mutex);
2759 3007
2760 cond_resched(); 3008 cond_resched();
2761 return 0; 3009 return 0;
@@ -2792,19 +3040,18 @@ static int noinline walk_up_tree(struct btrfs_trans_handle *trans,
2792 root_item->drop_level = i; 3040 root_item->drop_level = i;
2793 return 0; 3041 return 0;
2794 } else { 3042 } else {
2795 if (path->nodes[*level] == root->node) { 3043 struct extent_buffer *parent;
2796 root_owner = root->root_key.objectid; 3044 if (path->nodes[*level] == root->node)
2797 root_gen = 3045 parent = path->nodes[*level];
2798 btrfs_header_generation(path->nodes[*level]); 3046 else
2799 } else { 3047 parent = path->nodes[*level + 1];
2800 struct extent_buffer *node; 3048
2801 node = path->nodes[*level + 1]; 3049 root_owner = btrfs_header_owner(parent);
2802 root_owner = btrfs_header_owner(node); 3050 root_gen = btrfs_header_generation(parent);
2803 root_gen = btrfs_header_generation(node);
2804 }
2805 ret = btrfs_free_extent(trans, root, 3051 ret = btrfs_free_extent(trans, root,
2806 path->nodes[*level]->start, 3052 path->nodes[*level]->start,
2807 path->nodes[*level]->len, 3053 path->nodes[*level]->len,
3054 parent->start,
2808 root_owner, root_gen, 0, 0, 1); 3055 root_owner, root_gen, 0, 0, 1);
2809 BUG_ON(ret); 3056 BUG_ON(ret);
2810 free_extent_buffer(path->nodes[*level]); 3057 free_extent_buffer(path->nodes[*level]);
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 8624f3e88036..58ad25838a41 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2201,9 +2201,10 @@ retry:
2201 } 2201 }
2202 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) 2202 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
2203 mapping->writeback_index = index; 2203 mapping->writeback_index = index;
2204 2204#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,26)
2205 if (wbc->range_cont) 2205 if (wbc->range_cont)
2206 wbc->range_start = index << PAGE_CACHE_SHIFT; 2206 wbc->range_start = index << PAGE_CACHE_SHIFT;
2207#endif
2207 return ret; 2208 return ret;
2208} 2209}
2209EXPORT_SYMBOL(extent_write_cache_pages); 2210EXPORT_SYMBOL(extent_write_cache_pages);
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 58b329ddb426..48a702d41c8c 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -524,6 +524,9 @@ int noinline btrfs_drop_extents(struct btrfs_trans_handle *trans,
524{ 524{
525 u64 extent_end = 0; 525 u64 extent_end = 0;
526 u64 search_start = start; 526 u64 search_start = start;
527 u64 leaf_start;
528 u64 root_gen;
529 u64 root_owner;
527 struct extent_buffer *leaf; 530 struct extent_buffer *leaf;
528 struct btrfs_file_extent_item *extent; 531 struct btrfs_file_extent_item *extent;
529 struct btrfs_path *path; 532 struct btrfs_path *path;
@@ -562,6 +565,9 @@ next_slot:
562 bookend = 0; 565 bookend = 0;
563 found_extent = 0; 566 found_extent = 0;
564 found_inline = 0; 567 found_inline = 0;
568 leaf_start = 0;
569 root_gen = 0;
570 root_owner = 0;
565 extent = NULL; 571 extent = NULL;
566 leaf = path->nodes[0]; 572 leaf = path->nodes[0];
567 slot = path->slots[0]; 573 slot = path->slots[0];
@@ -628,27 +634,18 @@ next_slot:
628 search_start = extent_end; 634 search_start = extent_end;
629 if (end <= extent_end && start >= key.offset && found_inline) { 635 if (end <= extent_end && start >= key.offset && found_inline) {
630 *hint_byte = EXTENT_MAP_INLINE; 636 *hint_byte = EXTENT_MAP_INLINE;
631 continue; 637 goto out;
638 }
639
640 if (found_extent) {
641 read_extent_buffer(leaf, &old, (unsigned long)extent,
642 sizeof(old));
643 root_gen = btrfs_header_generation(leaf);
644 root_owner = btrfs_header_owner(leaf);
645 leaf_start = leaf->start;
632 } 646 }
647
633 if (end < extent_end && end >= key.offset) { 648 if (end < extent_end && end >= key.offset) {
634 if (found_extent) {
635 u64 disk_bytenr =
636 btrfs_file_extent_disk_bytenr(leaf, extent);
637 u64 disk_num_bytes =
638 btrfs_file_extent_disk_num_bytes(leaf,
639 extent);
640 read_extent_buffer(leaf, &old,
641 (unsigned long)extent,
642 sizeof(old));
643 if (disk_bytenr != 0) {
644 ret = btrfs_inc_extent_ref(trans, root,
645 disk_bytenr, disk_num_bytes,
646 root->root_key.objectid,
647 trans->transid,
648 key.objectid, end);
649 BUG_ON(ret);
650 }
651 }
652 bookend = 1; 649 bookend = 1;
653 if (found_inline && start <= key.offset) 650 if (found_inline && start <= key.offset)
654 keep = 1; 651 keep = 1;
@@ -687,49 +684,12 @@ next_slot:
687 } 684 }
688 /* delete the entire extent */ 685 /* delete the entire extent */
689 if (!keep) { 686 if (!keep) {
690 u64 disk_bytenr = 0;
691 u64 disk_num_bytes = 0;
692 u64 extent_num_bytes = 0;
693 u64 root_gen;
694 u64 root_owner;
695
696 root_gen = btrfs_header_generation(leaf);
697 root_owner = btrfs_header_owner(leaf);
698 if (found_extent) {
699 disk_bytenr =
700 btrfs_file_extent_disk_bytenr(leaf,
701 extent);
702 disk_num_bytes =
703 btrfs_file_extent_disk_num_bytes(leaf,
704 extent);
705 extent_num_bytes =
706 btrfs_file_extent_num_bytes(leaf, extent);
707 *hint_byte =
708 btrfs_file_extent_disk_bytenr(leaf,
709 extent);
710 }
711 ret = btrfs_del_item(trans, root, path); 687 ret = btrfs_del_item(trans, root, path);
712 /* TODO update progress marker and return */ 688 /* TODO update progress marker and return */
713 BUG_ON(ret); 689 BUG_ON(ret);
714 btrfs_release_path(root, path);
715 extent = NULL; 690 extent = NULL;
716 if (found_extent && disk_bytenr != 0) { 691 btrfs_release_path(root, path);
717 dec_i_blocks(inode, extent_num_bytes); 692 /* the extent will be freed later */
718 ret = btrfs_free_extent(trans, root,
719 disk_bytenr,
720 disk_num_bytes,
721 root_owner,
722 root_gen, inode->i_ino,
723 key.offset, 0);
724 }
725
726 BUG_ON(ret);
727 if (!bookend && search_start >= end) {
728 ret = 0;
729 goto out;
730 }
731 if (!bookend)
732 continue;
733 } 693 }
734 if (bookend && found_inline && start <= key.offset) { 694 if (bookend && found_inline && start <= key.offset) {
735 u32 new_size; 695 u32 new_size;
@@ -737,10 +697,13 @@ next_slot:
737 extent_end - end); 697 extent_end - end);
738 dec_i_blocks(inode, (extent_end - key.offset) - 698 dec_i_blocks(inode, (extent_end - key.offset) -
739 (extent_end - end)); 699 (extent_end - end));
740 btrfs_truncate_item(trans, root, path, new_size, 0); 700 ret = btrfs_truncate_item(trans, root, path,
701 new_size, 0);
702 BUG_ON(ret);
741 } 703 }
742 /* create bookend, splitting the extent in two */ 704 /* create bookend, splitting the extent in two */
743 if (bookend && found_extent) { 705 if (bookend && found_extent) {
706 u64 disk_bytenr;
744 struct btrfs_key ins; 707 struct btrfs_key ins;
745 ins.objectid = inode->i_ino; 708 ins.objectid = inode->i_ino;
746 ins.offset = end; 709 ins.offset = end;
@@ -748,13 +711,9 @@ next_slot:
748 btrfs_release_path(root, path); 711 btrfs_release_path(root, path);
749 ret = btrfs_insert_empty_item(trans, root, path, &ins, 712 ret = btrfs_insert_empty_item(trans, root, path, &ins,
750 sizeof(*extent)); 713 sizeof(*extent));
714 BUG_ON(ret);
751 715
752 leaf = path->nodes[0]; 716 leaf = path->nodes[0];
753 if (ret) {
754 btrfs_print_leaf(root, leaf);
755 printk("got %d on inserting %Lu %u %Lu start %Lu end %Lu found %Lu %Lu keep was %d\n", ret , ins.objectid, ins.type, ins.offset, start, end, key.offset, extent_end, keep);
756 }
757 BUG_ON(ret);
758 extent = btrfs_item_ptr(leaf, path->slots[0], 717 extent = btrfs_item_ptr(leaf, path->slots[0],
759 struct btrfs_file_extent_item); 718 struct btrfs_file_extent_item);
760 write_extent_buffer(leaf, &old, 719 write_extent_buffer(leaf, &old,
@@ -770,11 +729,43 @@ next_slot:
770 BTRFS_FILE_EXTENT_REG); 729 BTRFS_FILE_EXTENT_REG);
771 730
772 btrfs_mark_buffer_dirty(path->nodes[0]); 731 btrfs_mark_buffer_dirty(path->nodes[0]);
773 if (le64_to_cpu(old.disk_bytenr) != 0) { 732
733 disk_bytenr = le64_to_cpu(old.disk_bytenr);
734 if (disk_bytenr != 0) {
735 ret = btrfs_inc_extent_ref(trans, root,
736 disk_bytenr,
737 le64_to_cpu(old.disk_num_bytes),
738 leaf->start,
739 root->root_key.objectid,
740 trans->transid,
741 ins.objectid, ins.offset);
742 BUG_ON(ret);
743 }
744 btrfs_release_path(root, path);
745 if (disk_bytenr != 0) {
774 inode->i_blocks += 746 inode->i_blocks +=
775 btrfs_file_extent_num_bytes(leaf, 747 btrfs_file_extent_num_bytes(leaf,
776 extent) >> 9; 748 extent) >> 9;
777 } 749 }
750 }
751
752 if (found_extent && !keep) {
753 u64 disk_bytenr = le64_to_cpu(old.disk_bytenr);
754
755 if (disk_bytenr != 0) {
756 dec_i_blocks(inode, le64_to_cpu(old.num_bytes));
757 ret = btrfs_free_extent(trans, root,
758 disk_bytenr,
759 le64_to_cpu(old.disk_num_bytes),
760 leaf_start, root_owner,
761 root_gen, key.objectid,
762 key.offset, 0);
763 BUG_ON(ret);
764 *hint_byte = disk_bytenr;
765 }
766 }
767
768 if (search_start >= end) {
778 ret = 0; 769 ret = 0;
779 goto out; 770 goto out;
780 } 771 }
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 65b4f864b0df..2e7d82ec5d18 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -528,6 +528,9 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
528 struct btrfs_trans_handle *trans; 528 struct btrfs_trans_handle *trans;
529 struct btrfs_ordered_extent *ordered_extent; 529 struct btrfs_ordered_extent *ordered_extent;
530 struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; 530 struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
531 struct btrfs_file_extent_item *extent_item;
532 struct btrfs_path *path = NULL;
533 struct extent_buffer *leaf;
531 u64 alloc_hint = 0; 534 u64 alloc_hint = 0;
532 struct list_head list; 535 struct list_head list;
533 struct btrfs_key ins; 536 struct btrfs_key ins;
@@ -544,20 +547,15 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
544 if (test_bit(BTRFS_ORDERED_NOCOW, &ordered_extent->flags)) 547 if (test_bit(BTRFS_ORDERED_NOCOW, &ordered_extent->flags))
545 goto nocow; 548 goto nocow;
546 549
550 path = btrfs_alloc_path();
551 BUG_ON(!path);
552
547 lock_extent(io_tree, ordered_extent->file_offset, 553 lock_extent(io_tree, ordered_extent->file_offset,
548 ordered_extent->file_offset + ordered_extent->len - 1, 554 ordered_extent->file_offset + ordered_extent->len - 1,
549 GFP_NOFS); 555 GFP_NOFS);
550 556
551 INIT_LIST_HEAD(&list); 557 INIT_LIST_HEAD(&list);
552 558
553 ins.objectid = ordered_extent->start;
554 ins.offset = ordered_extent->len;
555 ins.type = BTRFS_EXTENT_ITEM_KEY;
556
557 ret = btrfs_alloc_reserved_extent(trans, root, root->root_key.objectid,
558 trans->transid, inode->i_ino,
559 ordered_extent->file_offset, &ins);
560 BUG_ON(ret);
561 mutex_lock(&BTRFS_I(inode)->extent_mutex); 559 mutex_lock(&BTRFS_I(inode)->extent_mutex);
562 560
563 ret = btrfs_drop_extents(trans, root, inode, 561 ret = btrfs_drop_extents(trans, root, inode,
@@ -566,18 +564,42 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
566 ordered_extent->len, 564 ordered_extent->len,
567 ordered_extent->file_offset, &alloc_hint); 565 ordered_extent->file_offset, &alloc_hint);
568 BUG_ON(ret); 566 BUG_ON(ret);
569 ret = btrfs_insert_file_extent(trans, root, inode->i_ino, 567
570 ordered_extent->file_offset, 568 ins.objectid = inode->i_ino;
571 ordered_extent->start, 569 ins.offset = ordered_extent->file_offset;
572 ordered_extent->len, 570 ins.type = BTRFS_EXTENT_DATA_KEY;
573 ordered_extent->len, 0); 571 ret = btrfs_insert_empty_item(trans, root, path, &ins,
572 sizeof(*extent_item));
574 BUG_ON(ret); 573 BUG_ON(ret);
574 leaf = path->nodes[0];
575 extent_item = btrfs_item_ptr(leaf, path->slots[0],
576 struct btrfs_file_extent_item);
577 btrfs_set_file_extent_generation(leaf, extent_item, trans->transid);
578 btrfs_set_file_extent_type(leaf, extent_item, BTRFS_FILE_EXTENT_REG);
579 btrfs_set_file_extent_disk_bytenr(leaf, extent_item,
580 ordered_extent->start);
581 btrfs_set_file_extent_disk_num_bytes(leaf, extent_item,
582 ordered_extent->len);
583 btrfs_set_file_extent_offset(leaf, extent_item, 0);
584 btrfs_set_file_extent_num_bytes(leaf, extent_item,
585 ordered_extent->len);
586 btrfs_mark_buffer_dirty(leaf);
575 587
576 btrfs_drop_extent_cache(inode, ordered_extent->file_offset, 588 btrfs_drop_extent_cache(inode, ordered_extent->file_offset,
577 ordered_extent->file_offset + 589 ordered_extent->file_offset +
578 ordered_extent->len - 1); 590 ordered_extent->len - 1);
579 mutex_unlock(&BTRFS_I(inode)->extent_mutex); 591 mutex_unlock(&BTRFS_I(inode)->extent_mutex);
580 592
593 ins.objectid = ordered_extent->start;
594 ins.offset = ordered_extent->len;
595 ins.type = BTRFS_EXTENT_ITEM_KEY;
596 ret = btrfs_alloc_reserved_extent(trans, root, leaf->start,
597 root->root_key.objectid,
598 trans->transid, inode->i_ino,
599 ordered_extent->file_offset, &ins);
600 BUG_ON(ret);
601 btrfs_release_path(root, path);
602
581 inode->i_blocks += ordered_extent->len >> 9; 603 inode->i_blocks += ordered_extent->len >> 9;
582 unlock_extent(io_tree, ordered_extent->file_offset, 604 unlock_extent(io_tree, ordered_extent->file_offset,
583 ordered_extent->file_offset + ordered_extent->len - 1, 605 ordered_extent->file_offset + ordered_extent->len - 1,
@@ -596,6 +618,8 @@ nocow:
596 btrfs_put_ordered_extent(ordered_extent); 618 btrfs_put_ordered_extent(ordered_extent);
597 619
598 btrfs_end_transaction(trans, root); 620 btrfs_end_transaction(trans, root);
621 if (path)
622 btrfs_free_path(path);
599 return 0; 623 return 0;
600} 624}
601 625
@@ -1433,10 +1457,7 @@ search_again:
1433 if (root->ref_cows) 1457 if (root->ref_cows)
1434 dec_i_blocks(inode, num_dec); 1458 dec_i_blocks(inode, num_dec);
1435 } 1459 }
1436 if (root->ref_cows) { 1460 root_gen = btrfs_header_generation(leaf);
1437 root_gen =
1438 btrfs_header_generation(leaf);
1439 }
1440 root_owner = btrfs_header_owner(leaf); 1461 root_owner = btrfs_header_owner(leaf);
1441 } 1462 }
1442 } else if (extent_type == BTRFS_FILE_EXTENT_INLINE) { 1463 } else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
@@ -1477,7 +1498,7 @@ delete:
1477 if (found_extent) { 1498 if (found_extent) {
1478 ret = btrfs_free_extent(trans, root, extent_start, 1499 ret = btrfs_free_extent(trans, root, extent_start,
1479 extent_num_bytes, 1500 extent_num_bytes,
1480 root_owner, 1501 leaf->start, root_owner,
1481 root_gen, inode->i_ino, 1502 root_gen, inode->i_ino,
1482 found_key.offset, 0); 1503 found_key.offset, 0);
1483 BUG_ON(ret); 1504 BUG_ON(ret);
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index f84b5f6991cc..4c6e0c15754d 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -76,9 +76,8 @@ static noinline int create_subvol(struct btrfs_root *root, char *name,
76 if (ret) 76 if (ret)
77 goto fail; 77 goto fail;
78 78
79 leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 79 leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0,
80 objectid, trans->transid, 0, 0, 80 objectid, trans->transid, 0, 0, 0);
81 0, 0);
82 if (IS_ERR(leaf)) { 81 if (IS_ERR(leaf)) {
83 ret = PTR_ERR(leaf); 82 ret = PTR_ERR(leaf);
84 goto fail; 83 goto fail;
@@ -525,13 +524,10 @@ long btrfs_ioctl_clone(struct file *file, unsigned long src_fd)
525 struct file *src_file; 524 struct file *src_file;
526 struct inode *src; 525 struct inode *src;
527 struct btrfs_trans_handle *trans; 526 struct btrfs_trans_handle *trans;
528 struct btrfs_ordered_extent *ordered;
529 struct btrfs_path *path; 527 struct btrfs_path *path;
530 struct extent_buffer *leaf; 528 struct extent_buffer *leaf;
531 char *buf; 529 char *buf;
532 struct btrfs_key key; 530 struct btrfs_key key;
533 struct btrfs_key new_key;
534 u32 size;
535 u32 nritems; 531 u32 nritems;
536 int slot; 532 int slot;
537 int ret; 533 int ret;
@@ -576,6 +572,7 @@ long btrfs_ioctl_clone(struct file *file, unsigned long src_fd)
576 /* do any pending delalloc/csum calc on src, one way or 572 /* do any pending delalloc/csum calc on src, one way or
577 another, and lock file content */ 573 another, and lock file content */
578 while (1) { 574 while (1) {
575 struct btrfs_ordered_extent *ordered;
579 lock_extent(&BTRFS_I(src)->io_tree, 0, (u64)-1, GFP_NOFS); 576 lock_extent(&BTRFS_I(src)->io_tree, 0, (u64)-1, GFP_NOFS);
580 ordered = btrfs_lookup_first_ordered_extent(inode, (u64)-1); 577 ordered = btrfs_lookup_first_ordered_extent(inode, (u64)-1);
581 if (BTRFS_I(src)->delalloc_bytes == 0 && !ordered) 578 if (BTRFS_I(src)->delalloc_bytes == 0 && !ordered)
@@ -619,6 +616,32 @@ long btrfs_ioctl_clone(struct file *file, unsigned long src_fd)
619 key.objectid != src->i_ino) 616 key.objectid != src->i_ino)
620 break; 617 break;
621 618
619 if (btrfs_key_type(&key) == BTRFS_EXTENT_DATA_KEY ||
620 btrfs_key_type(&key) == BTRFS_CSUM_ITEM_KEY) {
621 u32 size;
622 struct btrfs_key new_key;
623
624 size = btrfs_item_size_nr(leaf, slot);
625 read_extent_buffer(leaf, buf,
626 btrfs_item_ptr_offset(leaf, slot),
627 size);
628 btrfs_release_path(root, path);
629
630 memcpy(&new_key, &key, sizeof(new_key));
631 new_key.objectid = inode->i_ino;
632 ret = btrfs_insert_empty_item(trans, root, path,
633 &new_key, size);
634 if (ret)
635 goto out;
636
637 leaf = path->nodes[0];
638 slot = path->slots[0];
639 write_extent_buffer(leaf, buf,
640 btrfs_item_ptr_offset(leaf, slot),
641 size);
642 btrfs_mark_buffer_dirty(leaf);
643 }
644
622 if (btrfs_key_type(&key) == BTRFS_EXTENT_DATA_KEY) { 645 if (btrfs_key_type(&key) == BTRFS_EXTENT_DATA_KEY) {
623 struct btrfs_file_extent_item *extent; 646 struct btrfs_file_extent_item *extent;
624 int found_type; 647 int found_type;
@@ -634,31 +657,15 @@ long btrfs_ioctl_clone(struct file *file, unsigned long src_fd)
634 /* ds == 0 means there's a hole */ 657 /* ds == 0 means there's a hole */
635 if (ds != 0) { 658 if (ds != 0) {
636 ret = btrfs_inc_extent_ref(trans, root, 659 ret = btrfs_inc_extent_ref(trans, root,
637 ds, dl, 660 ds, dl, leaf->start,
638 root->root_key.objectid, 661 root->root_key.objectid,
639 trans->transid, 662 trans->transid,
640 inode->i_ino, key.offset); 663 inode->i_ino, key.offset);
641 if (ret) 664 BUG_ON(ret);
642 goto out;
643 } 665 }
644 } 666 }
645 } 667 }
646 668 btrfs_release_path(root, path);
647 if (btrfs_key_type(&key) == BTRFS_EXTENT_DATA_KEY ||
648 btrfs_key_type(&key) == BTRFS_CSUM_ITEM_KEY) {
649 size = btrfs_item_size_nr(leaf, slot);
650 read_extent_buffer(leaf, buf,
651 btrfs_item_ptr_offset(leaf, slot),
652 size);
653 btrfs_release_path(root, path);
654 memcpy(&new_key, &key, sizeof(new_key));
655 new_key.objectid = inode->i_ino;
656 ret = btrfs_insert_item(trans, root, &new_key,
657 buf, size);
658 BUG_ON(ret);
659 } else {
660 btrfs_release_path(root, path);
661 }
662 key.offset++; 669 key.offset++;
663 } 670 }
664 ret = 0; 671 ret = 0;
diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index f1374d597a17..3577badfa5bc 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -102,11 +102,12 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
102 case BTRFS_EXTENT_REF_KEY: 102 case BTRFS_EXTENT_REF_KEY:
103 ref = btrfs_item_ptr(l, i, struct btrfs_extent_ref); 103 ref = btrfs_item_ptr(l, i, struct btrfs_extent_ref);
104 printk("\t\textent back ref root %llu gen %llu " 104 printk("\t\textent back ref root %llu gen %llu "
105 "owner %llu offset %llu\n", 105 "owner %llu offset %llu num_refs %lu\n",
106 (unsigned long long)btrfs_ref_root(l, ref), 106 (unsigned long long)btrfs_ref_root(l, ref),
107 (unsigned long long)btrfs_ref_generation(l, ref), 107 (unsigned long long)btrfs_ref_generation(l, ref),
108 (unsigned long long)btrfs_ref_objectid(l, ref), 108 (unsigned long long)btrfs_ref_objectid(l, ref),
109 (unsigned long long)btrfs_ref_offset(l, ref)); 109 (unsigned long long)btrfs_ref_offset(l, ref),
110 (unsigned long)btrfs_ref_num_refs(l, ref));
110 break; 111 break;
111 112
112 case BTRFS_EXTENT_DATA_KEY: 113 case BTRFS_EXTENT_DATA_KEY:
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 56de3fb2d8d5..88bbfd959f18 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -89,9 +89,9 @@ int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
89 int ret; 89 int ret;
90 u64 objectid = root->root_key.objectid; 90 u64 objectid = root->root_key.objectid;
91 91
92 leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 92 leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0,
93 BTRFS_TREE_LOG_OBJECTID, 93 BTRFS_TREE_LOG_OBJECTID,
94 0, 0, 0, 0, 0); 94 trans->transid, 0, 0, 0);
95 if (IS_ERR(leaf)) { 95 if (IS_ERR(leaf)) {
96 ret = PTR_ERR(leaf); 96 ret = PTR_ERR(leaf);
97 return ret; 97 return ret;
@@ -433,6 +433,49 @@ insert:
433 trans->transid); 433 trans->transid);
434 } 434 }
435 } 435 }
436
437 if (overwrite_root &&
438 key->type == BTRFS_EXTENT_DATA_KEY) {
439 int extent_type;
440 struct btrfs_file_extent_item *fi;
441
442 fi = (struct btrfs_file_extent_item *)dst_ptr;
443 extent_type = btrfs_file_extent_type(path->nodes[0], fi);
444 if (extent_type == BTRFS_FILE_EXTENT_REG) {
445 struct btrfs_key ins;
446 ins.objectid = btrfs_file_extent_disk_bytenr(
447 path->nodes[0], fi);
448 ins.offset = btrfs_file_extent_disk_num_bytes(
449 path->nodes[0], fi);
450 ins.type = BTRFS_EXTENT_ITEM_KEY;
451
452 /*
453 * is this extent already allocated in the extent
454 * allocation tree? If so, just add a reference
455 */
456 ret = btrfs_lookup_extent(root, ins.objectid,
457 ins.offset);
458 if (ret == 0) {
459 ret = btrfs_inc_extent_ref(trans, root,
460 ins.objectid, ins.offset,
461 path->nodes[0]->start,
462 root->root_key.objectid,
463 trans->transid,
464 key->objectid, key->offset);
465 } else {
466 /*
467 * insert the extent pointer in the extent
468 * allocation tree
469 */
470 ret = btrfs_alloc_logged_extent(trans, root,
471 path->nodes[0]->start,
472 root->root_key.objectid,
473 trans->transid, key->objectid,
474 key->offset, &ins);
475 BUG_ON(ret);
476 }
477 }
478 }
436no_copy: 479no_copy:
437 btrfs_mark_buffer_dirty(path->nodes[0]); 480 btrfs_mark_buffer_dirty(path->nodes[0]);
438 btrfs_release_path(root, path); 481 btrfs_release_path(root, path);
@@ -551,45 +594,10 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
551 start, extent_end, start, &alloc_hint); 594 start, extent_end, start, &alloc_hint);
552 BUG_ON(ret); 595 BUG_ON(ret);
553 596
597 /* insert the extent */
598 ret = overwrite_item(trans, root, path, eb, slot, key);
554 BUG_ON(ret); 599 BUG_ON(ret);
555 if (found_type == BTRFS_FILE_EXTENT_REG) {
556 struct btrfs_key ins;
557
558 ins.objectid = btrfs_file_extent_disk_bytenr(eb, item);
559 ins.offset = btrfs_file_extent_disk_num_bytes(eb, item);
560 ins.type = BTRFS_EXTENT_ITEM_KEY;
561
562 /* insert the extent pointer in the file */
563 ret = overwrite_item(trans, root, path, eb, slot, key);
564 BUG_ON(ret);
565 600
566 /*
567 * is this extent already allocated in the extent
568 * allocation tree? If so, just add a reference
569 */
570 ret = btrfs_lookup_extent(root, path, ins.objectid, ins.offset);
571 btrfs_release_path(root, path);
572 if (ret == 0) {
573 ret = btrfs_inc_extent_ref(trans, root,
574 ins.objectid, ins.offset,
575 root->root_key.objectid,
576 trans->transid, key->objectid, start);
577 } else {
578 /*
579 * insert the extent pointer in the extent
580 * allocation tree
581 */
582 ret = btrfs_alloc_logged_extent(trans, root,
583 root->root_key.objectid,
584 trans->transid, key->objectid,
585 start, &ins);
586 BUG_ON(ret);
587 }
588 } else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
589 /* inline extents are easy, we just overwrite them */
590 ret = overwrite_item(trans, root, path, eb, slot, key);
591 BUG_ON(ret);
592 }
593 /* btrfs_drop_extents changes i_blocks, update it here */ 601 /* btrfs_drop_extents changes i_blocks, update it here */
594 inode->i_blocks += (extent_end - start) >> 9; 602 inode->i_blocks += (extent_end - start) >> 9;
595 btrfs_update_inode(trans, root, inode); 603 btrfs_update_inode(trans, root, inode);
@@ -1806,16 +1814,14 @@ static int noinline walk_up_log_tree(struct btrfs_trans_handle *trans,
1806 WARN_ON(*level == 0); 1814 WARN_ON(*level == 0);
1807 return 0; 1815 return 0;
1808 } else { 1816 } else {
1809 if (path->nodes[*level] == root->node) { 1817 struct extent_buffer *parent;
1810 root_owner = root->root_key.objectid; 1818 if (path->nodes[*level] == root->node)
1811 root_gen = 1819 parent = path->nodes[*level];
1812 btrfs_header_generation(path->nodes[*level]); 1820 else
1813 } else { 1821 parent = path->nodes[*level + 1];
1814 struct extent_buffer *node; 1822
1815 node = path->nodes[*level + 1]; 1823 root_owner = btrfs_header_owner(parent);
1816 root_owner = btrfs_header_owner(node); 1824 root_gen = btrfs_header_generation(parent);
1817 root_gen = btrfs_header_generation(node);
1818 }
1819 wc->process_func(root, path->nodes[*level], wc, 1825 wc->process_func(root, path->nodes[*level], wc,
1820 btrfs_header_generation(path->nodes[*level])); 1826 btrfs_header_generation(path->nodes[*level]));
1821 if (wc->free) { 1827 if (wc->free) {
@@ -2525,8 +2531,10 @@ static noinline int copy_items(struct btrfs_trans_handle *trans,
2525 if (ds != 0) { 2531 if (ds != 0) {
2526 ret = btrfs_inc_extent_ref(trans, log, 2532 ret = btrfs_inc_extent_ref(trans, log,
2527 ds, dl, 2533 ds, dl,
2534 dst_path->nodes[0]->start,
2528 BTRFS_TREE_LOG_OBJECTID, 2535 BTRFS_TREE_LOG_OBJECTID,
2529 0, ins_keys[i].objectid, 2536 trans->transid,
2537 ins_keys[i].objectid,
2530 ins_keys[i].offset); 2538 ins_keys[i].offset);
2531 BUG_ON(ret); 2539 BUG_ON(ret);
2532 } 2540 }
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-15 15:18:21 -0500