#include <linux/fs.h>
#include <linux/sched.h>
+#include <linux/writeback.h>
+#include <linux/pagemap.h>
#include "ctree.h"
#include "disk-io.h"
#include "transaction.h"
#define BTRFS_ROOT_TRANS_TAG 0
#define BTRFS_ROOT_DEFRAG_TAG 1
-static void put_transaction(struct btrfs_transaction *transaction)
+static noinline void put_transaction(struct btrfs_transaction *transaction)
{
WARN_ON(transaction->use_count == 0);
transaction->use_count--;
}
}
-static int join_transaction(struct btrfs_root *root)
+static noinline int join_transaction(struct btrfs_root *root)
{
struct btrfs_transaction *cur_trans;
cur_trans = root->fs_info->running_transaction;
total_trans++;
BUG_ON(!cur_trans);
root->fs_info->generation++;
- root->fs_info->running_transaction = cur_trans;
+ root->fs_info->last_alloc = 0;
+ root->fs_info->last_data_alloc = 0;
cur_trans->num_writers = 1;
cur_trans->num_joined = 0;
cur_trans->transid = root->fs_info->generation;
cur_trans->use_count = 1;
cur_trans->commit_done = 0;
cur_trans->start_time = get_seconds();
+ INIT_LIST_HEAD(&cur_trans->pending_snapshots);
list_add_tail(&cur_trans->list, &root->fs_info->trans_list);
- init_bit_radix(&cur_trans->dirty_pages);
+ btrfs_ordered_inode_tree_init(&cur_trans->ordered_inode_tree);
+ extent_io_tree_init(&cur_trans->dirty_pages,
+ root->fs_info->btree_inode->i_mapping,
+ GFP_NOFS);
+ spin_lock(&root->fs_info->new_trans_lock);
+ root->fs_info->running_transaction = cur_trans;
+ spin_unlock(&root->fs_info->new_trans_lock);
} else {
cur_trans->num_writers++;
cur_trans->num_joined++;
return 0;
}
-static int record_root_in_trans(struct btrfs_root *root)
+static noinline int record_root_in_trans(struct btrfs_root *root)
{
u64 running_trans_id = root->fs_info->running_transaction->transid;
if (root->ref_cows && root->last_trans < running_trans_id) {
(unsigned long)root->root_key.objectid,
BTRFS_ROOT_DEFRAG_TAG);
root->commit_root = root->node;
- get_bh(root->node);
+ extent_buffer_get(root->node);
} else {
WARN_ON(1);
}
int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
- unsigned long gang[16];
int ret;
- int i;
int err;
int werr = 0;
+ struct extent_io_tree *dirty_pages;
struct page *page;
- struct radix_tree_root *dirty_pages;
struct inode *btree_inode = root->fs_info->btree_inode;
+ u64 start;
+ u64 end;
+ unsigned long index;
if (!trans || !trans->transaction) {
return filemap_write_and_wait(btree_inode->i_mapping);
}
dirty_pages = &trans->transaction->dirty_pages;
while(1) {
- ret = find_first_radix_bit(dirty_pages, gang,
- 0, ARRAY_SIZE(gang));
- if (!ret)
+ ret = find_first_extent_bit(dirty_pages, 0, &start, &end,
+ EXTENT_DIRTY);
+ if (ret)
break;
- for (i = 0; i < ret; i++) {
- /* FIXME EIO */
- clear_radix_bit(dirty_pages, gang[i]);
- page = find_lock_page(btree_inode->i_mapping,
- gang[i]);
+ clear_extent_dirty(dirty_pages, start, end, GFP_NOFS);
+ while(start <= end) {
+ index = start >> PAGE_CACHE_SHIFT;
+ start = (u64)(index + 1) << PAGE_CACHE_SHIFT;
+ page = find_lock_page(btree_inode->i_mapping, index);
if (!page)
continue;
if (PageWriteback(page)) {
return werr;
}
-int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans,
- struct btrfs_root *root)
+static int update_cowonly_root(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root)
{
int ret;
- u64 old_extent_block;
- struct btrfs_fs_info *fs_info = root->fs_info;
- struct btrfs_root *tree_root = fs_info->tree_root;
- struct btrfs_root *extent_root = fs_info->extent_root;
+ u64 old_root_bytenr;
+ struct btrfs_root *tree_root = root->fs_info->tree_root;
- btrfs_write_dirty_block_groups(trans, extent_root);
+ btrfs_write_dirty_block_groups(trans, root);
while(1) {
- old_extent_block = btrfs_root_blocknr(&extent_root->root_item);
- if (old_extent_block == bh_blocknr(extent_root->node))
+ old_root_bytenr = btrfs_root_bytenr(&root->root_item);
+ if (old_root_bytenr == root->node->start)
break;
- btrfs_set_root_blocknr(&extent_root->root_item,
- bh_blocknr(extent_root->node));
+ btrfs_set_root_bytenr(&root->root_item,
+ root->node->start);
+ btrfs_set_root_level(&root->root_item,
+ btrfs_header_level(root->node));
ret = btrfs_update_root(trans, tree_root,
- &extent_root->root_key,
- &extent_root->root_item);
+ &root->root_key,
+ &root->root_item);
BUG_ON(ret);
- btrfs_write_dirty_block_groups(trans, extent_root);
+ btrfs_write_dirty_block_groups(trans, root);
+ }
+ return 0;
+}
+
+int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root)
+{
+ struct btrfs_fs_info *fs_info = root->fs_info;
+ struct list_head *next;
+
+ while(!list_empty(&fs_info->dirty_cowonly_roots)) {
+ next = fs_info->dirty_cowonly_roots.next;
+ list_del_init(next);
+ root = list_entry(next, struct btrfs_root, dirty_list);
+ update_cowonly_root(trans, root);
}
return 0;
}
-static int wait_for_commit(struct btrfs_root *root,
- struct btrfs_transaction *commit)
+static noinline int wait_for_commit(struct btrfs_root *root,
+ struct btrfs_transaction *commit)
{
DEFINE_WAIT(wait);
mutex_lock(&root->fs_info->trans_mutex);
struct btrfs_root *latest_root;
};
-int btrfs_add_dead_root(struct btrfs_root *root, struct list_head *dead_list)
+int btrfs_add_dead_root(struct btrfs_root *root,
+ struct btrfs_root *latest,
+ struct list_head *dead_list)
{
struct dirty_root *dirty;
if (!dirty)
return -ENOMEM;
dirty->root = root;
+ dirty->latest_root = latest;
list_add(&dirty->list, dead_list);
return 0;
}
-static int add_dirty_roots(struct btrfs_trans_handle *trans,
- struct radix_tree_root *radix,
- struct list_head *list)
+static noinline int add_dirty_roots(struct btrfs_trans_handle *trans,
+ struct radix_tree_root *radix,
+ struct list_head *list)
{
struct dirty_root *dirty;
struct btrfs_root *gang[8];
(unsigned long)root->root_key.objectid,
BTRFS_ROOT_TRANS_TAG);
if (root->commit_root == root->node) {
- WARN_ON(bh_blocknr(root->node) !=
- btrfs_root_blocknr(&root->root_item));
- brelse(root->commit_root);
+ WARN_ON(root->node->start !=
+ btrfs_root_bytenr(&root->root_item));
+ free_extent_buffer(root->commit_root);
root->commit_root = NULL;
/* make sure to update the root on disk
root->commit_root = NULL;
root->root_key.offset = root->fs_info->generation;
- btrfs_set_root_blocknr(&root->root_item,
- bh_blocknr(root->node));
+ btrfs_set_root_bytenr(&root->root_item,
+ root->node->start);
+ btrfs_set_root_level(&root->root_item,
+ btrfs_header_level(root->node));
err = btrfs_insert_root(trans, root->fs_info->tree_root,
&root->root_key,
&root->root_item);
struct btrfs_fs_info *info = root->fs_info;
int ret;
struct btrfs_trans_handle *trans;
+ unsigned long nr;
if (root->defrag_running)
return 0;
-
trans = btrfs_start_transaction(root, 1);
while (1) {
root->defrag_running = 1;
ret = btrfs_defrag_leaves(trans, root, cacheonly);
+ nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
mutex_unlock(&info->fs_mutex);
-
- btrfs_btree_balance_dirty(root);
+ btrfs_btree_balance_dirty(info->tree_root, nr);
cond_resched();
mutex_lock(&info->fs_mutex);
return err;
}
-static int drop_dirty_roots(struct btrfs_root *tree_root,
- struct list_head *list)
+static noinline int drop_dirty_roots(struct btrfs_root *tree_root,
+ struct list_head *list)
{
struct dirty_root *dirty;
struct btrfs_trans_handle *trans;
- u64 num_blocks;
- u64 blocks_used;
+ unsigned long nr;
+ u64 num_bytes;
+ u64 bytes_used;
int ret = 0;
int err;
dirty = list_entry(list->next, struct dirty_root, list);
list_del_init(&dirty->list);
- num_blocks = btrfs_root_blocks_used(&dirty->root->root_item);
+ num_bytes = btrfs_root_used(&dirty->root->root_item);
root = dirty->latest_root;
+ root->fs_info->throttles++;
while(1) {
trans = btrfs_start_transaction(tree_root, 1);
-
ret = btrfs_drop_snapshot(trans, dirty->root);
if (ret != -EAGAIN) {
break;
&dirty->root->root_item);
if (err)
ret = err;
+ nr = trans->blocks_used;
ret = btrfs_end_transaction(trans, tree_root);
BUG_ON(ret);
mutex_unlock(&tree_root->fs_info->fs_mutex);
-
- btrfs_btree_balance_dirty(tree_root);
- schedule();
-
+ btrfs_btree_balance_dirty(tree_root, nr);
+ cond_resched();
mutex_lock(&tree_root->fs_info->fs_mutex);
}
BUG_ON(ret);
+ root->fs_info->throttles--;
- num_blocks -= btrfs_root_blocks_used(&dirty->root->root_item);
- blocks_used = btrfs_root_blocks_used(&root->root_item);
- if (num_blocks) {
+ num_bytes -= btrfs_root_used(&dirty->root->root_item);
+ bytes_used = btrfs_root_used(&root->root_item);
+ if (num_bytes) {
record_root_in_trans(root);
- btrfs_set_root_blocks_used(&root->root_item,
- blocks_used - num_blocks);
+ btrfs_set_root_used(&root->root_item,
+ bytes_used - num_bytes);
}
ret = btrfs_del_root(trans, tree_root, &dirty->root->root_key);
if (ret) {
BUG();
break;
}
+ nr = trans->blocks_used;
ret = btrfs_end_transaction(trans, tree_root);
BUG_ON(ret);
+ free_extent_buffer(dirty->root->node);
kfree(dirty->root);
kfree(dirty);
mutex_unlock(&tree_root->fs_info->fs_mutex);
- btrfs_btree_balance_dirty(tree_root);
- schedule();
+
+ btrfs_btree_balance_dirty(tree_root, nr);
+ cond_resched();
}
return ret;
}
+int btrfs_write_ordered_inodes(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root)
+{
+ struct btrfs_transaction *cur_trans = trans->transaction;
+ struct inode *inode;
+ u64 root_objectid = 0;
+ u64 objectid = 0;
+ int ret;
+
+ root->fs_info->throttles++;
+ while(1) {
+ ret = btrfs_find_first_ordered_inode(
+ &cur_trans->ordered_inode_tree,
+ &root_objectid, &objectid, &inode);
+ if (!ret)
+ break;
+
+ mutex_unlock(&root->fs_info->trans_mutex);
+ mutex_unlock(&root->fs_info->fs_mutex);
+
+ if (S_ISREG(inode->i_mode)) {
+ atomic_inc(&BTRFS_I(inode)->ordered_writeback);
+ filemap_fdatawrite(inode->i_mapping);
+ atomic_dec(&BTRFS_I(inode)->ordered_writeback);
+ }
+ iput(inode);
+
+ mutex_lock(&root->fs_info->fs_mutex);
+ mutex_lock(&root->fs_info->trans_mutex);
+ }
+ while(1) {
+ root_objectid = 0;
+ objectid = 0;
+ ret = btrfs_find_del_first_ordered_inode(
+ &cur_trans->ordered_inode_tree,
+ &root_objectid, &objectid, &inode);
+ if (!ret)
+ break;
+ mutex_unlock(&root->fs_info->trans_mutex);
+ mutex_unlock(&root->fs_info->fs_mutex);
+
+ if (S_ISREG(inode->i_mode)) {
+ atomic_inc(&BTRFS_I(inode)->ordered_writeback);
+ filemap_write_and_wait(inode->i_mapping);
+ atomic_dec(&BTRFS_I(inode)->ordered_writeback);
+ }
+ atomic_dec(&inode->i_count);
+ iput(inode);
+
+ mutex_lock(&root->fs_info->fs_mutex);
+ mutex_lock(&root->fs_info->trans_mutex);
+ }
+ root->fs_info->throttles--;
+ return 0;
+}
+
+static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_pending_snapshot *pending)
+{
+ struct btrfs_key key;
+ struct btrfs_root_item *new_root_item;
+ struct btrfs_root *tree_root = fs_info->tree_root;
+ struct btrfs_root *root = pending->root;
+ struct extent_buffer *tmp;
+ int ret;
+ int namelen;
+ u64 objectid;
+
+ new_root_item = kmalloc(sizeof(*new_root_item), GFP_NOFS);
+ if (!new_root_item) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+ ret = btrfs_find_free_objectid(trans, tree_root, 0, &objectid);
+ if (ret)
+ goto fail;
+
+ memcpy(new_root_item, &root->root_item, sizeof(*new_root_item));
+
+ key.objectid = objectid;
+ key.offset = 1;
+ btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
+
+ extent_buffer_get(root->node);
+ btrfs_cow_block(trans, root, root->node, NULL, 0, &tmp);
+ free_extent_buffer(tmp);
+
+ btrfs_copy_root(trans, root, root->node, &tmp, objectid);
+
+ btrfs_set_root_bytenr(new_root_item, tmp->start);
+ btrfs_set_root_level(new_root_item, btrfs_header_level(tmp));
+ ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key,
+ new_root_item);
+ free_extent_buffer(tmp);
+ if (ret)
+ goto fail;
+
+ /*
+ * insert the directory item
+ */
+ key.offset = (u64)-1;
+ namelen = strlen(pending->name);
+ ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
+ pending->name, namelen,
+ root->fs_info->sb->s_root->d_inode->i_ino,
+ &key, BTRFS_FT_DIR);
+
+ if (ret)
+ goto fail;
+
+ ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
+ pending->name, strlen(pending->name), objectid,
+ root->fs_info->sb->s_root->d_inode->i_ino);
+
+ /* Invalidate existing dcache entry for new snapshot. */
+ btrfs_invalidate_dcache_root(root, pending->name, namelen);
+
+fail:
+ kfree(new_root_item);
+ return ret;
+}
+
+static noinline int create_pending_snapshots(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_pending_snapshot *pending;
+ struct list_head *head = &trans->transaction->pending_snapshots;
+ int ret;
+
+ while(!list_empty(head)) {
+ pending = list_entry(head->next,
+ struct btrfs_pending_snapshot, list);
+ ret = create_pending_snapshot(trans, fs_info, pending);
+ BUG_ON(ret);
+ list_del(&pending->list);
+ kfree(pending->name);
+ kfree(pending);
+ }
+ return 0;
+}
+
int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
unsigned long timeout = 1;
struct btrfs_transaction *cur_trans;
struct btrfs_transaction *prev_trans = NULL;
+ struct btrfs_root *chunk_root = root->fs_info->chunk_root;
struct list_head dirty_fs_roots;
- struct radix_tree_root pinned_copy;
+ struct extent_io_tree *pinned_copy;
DEFINE_WAIT(wait);
int ret;
- init_bit_radix(&pinned_copy);
INIT_LIST_HEAD(&dirty_fs_roots);
mutex_lock(&root->fs_info->trans_mutex);
mutex_lock(&root->fs_info->fs_mutex);
return 0;
}
+
+ pinned_copy = kmalloc(sizeof(*pinned_copy), GFP_NOFS);
+ if (!pinned_copy)
+ return -ENOMEM;
+
+ extent_io_tree_init(pinned_copy,
+ root->fs_info->btree_inode->i_mapping, GFP_NOFS);
+
trans->transaction->in_commit = 1;
cur_trans = trans->transaction;
if (cur_trans->list.prev != &root->fs_info->trans_list) {
mutex_lock(&root->fs_info->fs_mutex);
mutex_lock(&root->fs_info->trans_mutex);
finish_wait(&cur_trans->writer_wait, &wait);
+ ret = btrfs_write_ordered_inodes(trans, root);
+
} while (cur_trans->num_writers > 1 ||
(cur_trans->num_joined != joined));
+ ret = create_pending_snapshots(trans, root->fs_info);
+ BUG_ON(ret);
+
WARN_ON(cur_trans != trans->transaction);
+
ret = add_dirty_roots(trans, &root->fs_info->fs_roots_radix,
&dirty_fs_roots);
BUG_ON(ret);
BUG_ON(ret);
cur_trans = root->fs_info->running_transaction;
+ spin_lock(&root->fs_info->new_trans_lock);
root->fs_info->running_transaction = NULL;
+ spin_unlock(&root->fs_info->new_trans_lock);
btrfs_set_super_generation(&root->fs_info->super_copy,
cur_trans->transid);
btrfs_set_super_root(&root->fs_info->super_copy,
- bh_blocknr(root->fs_info->tree_root->node));
- memcpy(root->fs_info->disk_super, &root->fs_info->super_copy,
+ root->fs_info->tree_root->node->start);
+ btrfs_set_super_root_level(&root->fs_info->super_copy,
+ btrfs_header_level(root->fs_info->tree_root->node));
+
+ btrfs_set_super_chunk_root(&root->fs_info->super_copy,
+ chunk_root->node->start);
+ btrfs_set_super_chunk_root_level(&root->fs_info->super_copy,
+ btrfs_header_level(chunk_root->node));
+ memcpy(&root->fs_info->super_for_commit, &root->fs_info->super_copy,
sizeof(root->fs_info->super_copy));
- btrfs_copy_pinned(root, &pinned_copy);
+ btrfs_copy_pinned(root, pinned_copy);
mutex_unlock(&root->fs_info->trans_mutex);
mutex_unlock(&root->fs_info->fs_mutex);
ret = btrfs_write_and_wait_transaction(trans, root);
BUG_ON(ret);
write_ctree_super(trans, root);
+
mutex_lock(&root->fs_info->fs_mutex);
- btrfs_finish_extent_commit(trans, root, &pinned_copy);
+ btrfs_finish_extent_commit(trans, root, pinned_copy);
mutex_lock(&root->fs_info->trans_mutex);
+
+ kfree(pinned_copy);
+
cur_trans->commit_done = 1;
root->fs_info->last_trans_committed = cur_trans->transid;
wake_up(&cur_trans->commit_wait);
}
return 0;
}
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
+void btrfs_transaction_cleaner(void *p)
+#else
void btrfs_transaction_cleaner(struct work_struct *work)
+#endif
{
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
+ struct btrfs_fs_info *fs_info = p;
+#else
struct btrfs_fs_info *fs_info = container_of(work,
struct btrfs_fs_info,
trans_work.work);
+#endif
struct btrfs_root *root = fs_info->tree_root;
struct btrfs_transaction *cur;
struct btrfs_trans_handle *trans;
int ret;
mutex_lock(&root->fs_info->fs_mutex);
+ if (root->fs_info->closing)
+ goto out;
+
mutex_lock(&root->fs_info->trans_mutex);
cur = root->fs_info->running_transaction;
if (!cur) {
void btrfs_transaction_queue_work(struct btrfs_root *root, int delay)
{
- queue_delayed_work(trans_wq, &root->fs_info->trans_work, delay);
+ if (!root->fs_info->closing)
+ queue_delayed_work(trans_wq, &root->fs_info->trans_work, delay);
}
void btrfs_transaction_flush_work(struct btrfs_root *root)
{
- cancel_rearming_delayed_workqueue(trans_wq, &root->fs_info->trans_work);
+ cancel_delayed_work(&root->fs_info->trans_work);
flush_workqueue(trans_wq);
}
void __init btrfs_init_transaction_sys(void)
{
- trans_wq = create_workqueue("btrfs");
+ trans_wq = create_workqueue("btrfs-transaction");
}
-void __exit btrfs_exit_transaction_sys(void)
+void btrfs_exit_transaction_sys(void)
{
destroy_workqueue(trans_wq);
}
projects / linux-2.6-block.git / blobdiff