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Btrfs: introduce per-subvolume delalloc inode list 

When we create a snapshot, we need flush all delalloc inodes in the
fs, just flushing the inodes in the source tree is OK. So we introduce
per-subvolume delalloc inode list.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
This commit is contained in:
Miao Xie 2013-05-15 07:48:22 +00:00 committed by Josef Bacik
parent b0feb9d96e
commit eb73c1b7ce
7 changed files with 183 additions and 67 deletions
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22
fs/btrfs/ctree.h
View File

@ -1449,13 +1449,9 @@ struct btrfs_fs_info {
*/
struct list_head ordered_extents;
spinlock_t delalloc_lock;
/*
* all of the inodes that have delalloc bytes. It is possible for
* this list to be empty even when there is still dirty data=ordered
* extents waiting to finish IO.
*/
struct list_head delalloc_inodes;
spinlock_t delalloc_root_lock;
/* all fs/file tree roots that have delalloc inodes. */
struct list_head delalloc_roots;
/*
* there is a pool of worker threads for checksumming during writes
@ -1747,6 +1743,16 @@ struct btrfs_root {
spinlock_t root_item_lock;
atomic_t refs;
spinlock_t delalloc_lock;
/*
* all of the inodes that have delalloc bytes. It is possible for
* this list to be empty even when there is still dirty data=ordered
* extents waiting to finish IO.
*/
struct list_head delalloc_inodes;
struct list_head delalloc_root;
u64 nr_delalloc_inodes;
};
struct btrfs_ioctl_defrag_range_args {
@ -3550,6 +3556,8 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
u32 min_type);
int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
int btrfs_start_all_delalloc_inodes(struct btrfs_fs_info *fs_info,
int delay_iput);
int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
struct extent_state **cached_state);
int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,

2
fs/btrfs/dev-replace.c
View File

@ -470,7 +470,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
* flush all outstanding I/O and inode extent mappings before the
* copy operation is declared as being finished
*/
ret = btrfs_start_delalloc_inodes(root, 0);
ret = btrfs_start_all_delalloc_inodes(root->fs_info, 0);
if (ret) {
mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
return ret;

49
fs/btrfs/disk-io.c
View File

@ -1191,6 +1191,7 @@ static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
root->objectid = objectid;
root->last_trans = 0;
root->highest_objectid = 0;
root->nr_delalloc_inodes = 0;
root->name = NULL;
root->inode_tree = RB_ROOT;
INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC);
@ -1199,10 +1200,13 @@ static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
INIT_LIST_HEAD(&root->dirty_list);
INIT_LIST_HEAD(&root->root_list);
INIT_LIST_HEAD(&root->delalloc_inodes);
INIT_LIST_HEAD(&root->delalloc_root);
INIT_LIST_HEAD(&root->logged_list[0]);
INIT_LIST_HEAD(&root->logged_list[1]);
spin_lock_init(&root->orphan_lock);
spin_lock_init(&root->inode_lock);
spin_lock_init(&root->delalloc_lock);
spin_lock_init(&root->accounting_lock);
spin_lock_init(&root->log_extents_lock[0]);
spin_lock_init(&root->log_extents_lock[1]);
@ -2140,9 +2144,9 @@ int open_ctree(struct super_block *sb,
INIT_LIST_HEAD(&fs_info->trans_list);
INIT_LIST_HEAD(&fs_info->dead_roots);
INIT_LIST_HEAD(&fs_info->delayed_iputs);
INIT_LIST_HEAD(&fs_info->delalloc_inodes);
INIT_LIST_HEAD(&fs_info->delalloc_roots);
INIT_LIST_HEAD(&fs_info->caching_block_groups);
spin_lock_init(&fs_info->delalloc_lock);
spin_lock_init(&fs_info->delalloc_root_lock);
spin_lock_init(&fs_info->trans_lock);
spin_lock_init(&fs_info->fs_roots_radix_lock);
spin_lock_init(&fs_info->delayed_iput_lock);
@ -3803,24 +3807,49 @@ static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root)
INIT_LIST_HEAD(&splice);
spin_lock(&root->fs_info->delalloc_lock);
list_splice_init(&root->fs_info->delalloc_inodes, &splice);
spin_lock(&root->delalloc_lock);
list_splice_init(&root->delalloc_inodes, &splice);
while (!list_empty(&splice)) {
btrfs_inode = list_entry(splice.next, struct btrfs_inode,
delalloc_inodes);
btrfs_inode = list_first_entry(&splice, struct btrfs_inode,
delalloc_inodes);
list_del_init(&btrfs_inode->delalloc_inodes);
clear_bit(BTRFS_INODE_IN_DELALLOC_LIST,
&btrfs_inode->runtime_flags);
spin_unlock(&root->fs_info->delalloc_lock);
spin_unlock(&root->delalloc_lock);
btrfs_invalidate_inodes(btrfs_inode->root);
spin_lock(&root->fs_info->delalloc_lock);
spin_lock(&root->delalloc_lock);
}
spin_unlock(&root->fs_info->delalloc_lock);
spin_unlock(&root->delalloc_lock);
}
static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info)
{
struct btrfs_root *root;
struct list_head splice;
INIT_LIST_HEAD(&splice);
spin_lock(&fs_info->delalloc_root_lock);
list_splice_init(&fs_info->delalloc_roots, &splice);
while (!list_empty(&splice)) {
root = list_first_entry(&splice, struct btrfs_root,
delalloc_root);
list_del_init(&root->delalloc_root);
root = btrfs_grab_fs_root(root);
BUG_ON(!root);
spin_unlock(&fs_info->delalloc_root_lock);
btrfs_destroy_delalloc_inodes(root);
btrfs_put_fs_root(root);
spin_lock(&fs_info->delalloc_root_lock);
}
spin_unlock(&fs_info->delalloc_root_lock);
}
static int btrfs_destroy_marked_extents(struct btrfs_root *root,
@ -3974,7 +4003,7 @@ static int btrfs_cleanup_transaction(struct btrfs_root *root)
btrfs_destroy_delayed_inodes(root);
btrfs_assert_delayed_root_empty(root);
btrfs_destroy_delalloc_inodes(root);
btrfs_destroy_all_delalloc_inodes(root->fs_info);
spin_lock(&root->fs_info->trans_lock);
root->fs_info->running_transaction = NULL;

6
fs/btrfs/extent-tree.c
View File

@ -3899,7 +3899,7 @@ static void btrfs_writeback_inodes_sb_nr(struct btrfs_root *root,
* the filesystem is readonly(all dirty pages are written to
* the disk).
*/
btrfs_start_delalloc_inodes(root, 0);
btrfs_start_all_delalloc_inodes(root->fs_info, 0);
if (!current->journal_info)
btrfs_wait_ordered_extents(root, 0);
}
@ -5030,14 +5030,14 @@ static int update_block_group(struct btrfs_root *root,
int factor;
/* block accounting for super block */
spin_lock(&info->delalloc_lock);
spin_lock(&info->delalloc_root_lock);
old_val = btrfs_super_bytes_used(info->super_copy);
if (alloc)
old_val += num_bytes;
else
old_val -= num_bytes;
btrfs_set_super_bytes_used(info->super_copy, old_val);
spin_unlock(&info->delalloc_lock);
spin_unlock(&info->delalloc_root_lock);
while (total) {
cache = btrfs_lookup_block_group(info, bytenr);

167
fs/btrfs/inode.c
View File

@ -1528,6 +1528,46 @@ static void btrfs_merge_extent_hook(struct inode *inode,
spin_unlock(&BTRFS_I(inode)->lock);
}
static void btrfs_add_delalloc_inodes(struct btrfs_root *root,
struct inode *inode)
{
spin_lock(&root->delalloc_lock);
if (list_empty(&BTRFS_I(inode)->delalloc_inodes)) {
list_add_tail(&BTRFS_I(inode)->delalloc_inodes,
&root->delalloc_inodes);
set_bit(BTRFS_INODE_IN_DELALLOC_LIST,
&BTRFS_I(inode)->runtime_flags);
root->nr_delalloc_inodes++;
if (root->nr_delalloc_inodes == 1) {
spin_lock(&root->fs_info->delalloc_root_lock);
BUG_ON(!list_empty(&root->delalloc_root));
list_add_tail(&root->delalloc_root,
&root->fs_info->delalloc_roots);
spin_unlock(&root->fs_info->delalloc_root_lock);
}
}
spin_unlock(&root->delalloc_lock);
}
static void btrfs_del_delalloc_inode(struct btrfs_root *root,
struct inode *inode)
{
spin_lock(&root->delalloc_lock);
if (!list_empty(&BTRFS_I(inode)->delalloc_inodes)) {
list_del_init(&BTRFS_I(inode)->delalloc_inodes);
clear_bit(BTRFS_INODE_IN_DELALLOC_LIST,
&BTRFS_I(inode)->runtime_flags);
root->nr_delalloc_inodes--;
if (!root->nr_delalloc_inodes) {
spin_lock(&root->fs_info->delalloc_root_lock);
BUG_ON(list_empty(&root->delalloc_root));
list_del_init(&root->delalloc_root);
spin_unlock(&root->fs_info->delalloc_root_lock);
}
}
spin_unlock(&root->delalloc_lock);
}
/*
* extent_io.c set_bit_hook, used to track delayed allocation
* bytes in this file, and to maintain the list of inodes that
@ -1560,16 +1600,8 @@ static void btrfs_set_bit_hook(struct inode *inode,
spin_lock(&BTRFS_I(inode)->lock);
BTRFS_I(inode)->delalloc_bytes += len;
if (do_list && !test_bit(BTRFS_INODE_IN_DELALLOC_LIST,
&BTRFS_I(inode)->runtime_flags)) {
spin_lock(&root->fs_info->delalloc_lock);
if (list_empty(&BTRFS_I(inode)->delalloc_inodes)) {
list_add_tail(&BTRFS_I(inode)->delalloc_inodes,
&root->fs_info->delalloc_inodes);
set_bit(BTRFS_INODE_IN_DELALLOC_LIST,
&BTRFS_I(inode)->runtime_flags);
}
spin_unlock(&root->fs_info->delalloc_lock);
}
&BTRFS_I(inode)->runtime_flags))
btrfs_add_delalloc_inodes(root, inode);
spin_unlock(&BTRFS_I(inode)->lock);
}
}
@ -1612,15 +1644,8 @@ static void btrfs_clear_bit_hook(struct inode *inode,
BTRFS_I(inode)->delalloc_bytes -= len;
if (do_list && BTRFS_I(inode)->delalloc_bytes == 0 &&
test_bit(BTRFS_INODE_IN_DELALLOC_LIST,
&BTRFS_I(inode)->runtime_flags)) {
spin_lock(&root->fs_info->delalloc_lock);
if (!list_empty(&BTRFS_I(inode)->delalloc_inodes)) {
list_del_init(&BTRFS_I(inode)->delalloc_inodes);
clear_bit(BTRFS_INODE_IN_DELALLOC_LIST,
&BTRFS_I(inode)->runtime_flags);
}
spin_unlock(&root->fs_info->delalloc_lock);
}
&BTRFS_I(inode)->runtime_flags))
btrfs_del_delalloc_inode(root, inode);
spin_unlock(&BTRFS_I(inode)->lock);
}
}
@ -8338,7 +8363,7 @@ void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work)
* some fairly slow code that needs optimization. This walks the list
* of all the inodes with pending delalloc and forces them to disk.
*/
int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput)
static int __start_delalloc_inodes(struct btrfs_root *root, int delay_iput)
{
struct btrfs_inode *binode;
struct inode *inode;
@ -8347,30 +8372,23 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput)
struct list_head splice;
int ret = 0;
if (root->fs_info->sb->s_flags & MS_RDONLY)
return -EROFS;
INIT_LIST_HEAD(&works);
INIT_LIST_HEAD(&splice);
spin_lock(&root->fs_info->delalloc_lock);
list_splice_init(&root->fs_info->delalloc_inodes, &splice);
spin_lock(&root->delalloc_lock);
list_splice_init(&root->delalloc_inodes, &splice);
while (!list_empty(&splice)) {
binode = list_entry(splice.next, struct btrfs_inode,
delalloc_inodes);
list_del_init(&binode->delalloc_inodes);
list_move_tail(&binode->delalloc_inodes,
&root->delalloc_inodes);
inode = igrab(&binode->vfs_inode);
if (!inode) {
clear_bit(BTRFS_INODE_IN_DELALLOC_LIST,
&binode->runtime_flags);
cond_resched_lock(&root->delalloc_lock);
continue;
}
list_add_tail(&binode->delalloc_inodes,
&root->fs_info->delalloc_inodes);
spin_unlock(&root->fs_info->delalloc_lock);
spin_unlock(&root->delalloc_lock);
work = btrfs_alloc_delalloc_work(inode, 0, delay_iput);
if (unlikely(!work)) {
@ -8382,16 +8400,39 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput)
&work->work);
cond_resched();
spin_lock(&root->fs_info->delalloc_lock);
spin_lock(&root->delalloc_lock);
}
spin_unlock(&root->fs_info->delalloc_lock);
spin_unlock(&root->delalloc_lock);
list_for_each_entry_safe(work, next, &works, list) {
list_del_init(&work->list);
btrfs_wait_and_free_delalloc_work(work);
}
return 0;
out:
list_for_each_entry_safe(work, next, &works, list) {
list_del_init(&work->list);
btrfs_wait_and_free_delalloc_work(work);
}
/* the filemap_flush will queue IO into the worker threads, but
if (!list_empty_careful(&splice)) {
spin_lock(&root->delalloc_lock);
list_splice_tail(&splice, &root->delalloc_inodes);
spin_unlock(&root->delalloc_lock);
}
return ret;
}
int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput)
{
int ret;
if (root->fs_info->sb->s_flags & MS_RDONLY)
return -EROFS;
ret = __start_delalloc_inodes(root, delay_iput);
/*
* the filemap_flush will queue IO into the worker threads, but
* we have to make sure the IO is actually started and that
* ordered extents get created before we return
*/
@ -8403,17 +8444,55 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput)
atomic_read(&root->fs_info->async_delalloc_pages) == 0));
}
atomic_dec(&root->fs_info->async_submit_draining);
return ret;
}
int btrfs_start_all_delalloc_inodes(struct btrfs_fs_info *fs_info,
int delay_iput)
{
struct btrfs_root *root;
struct list_head splice;
int ret;
if (fs_info->sb->s_flags & MS_RDONLY)
return -EROFS;
INIT_LIST_HEAD(&splice);
spin_lock(&fs_info->delalloc_root_lock);
list_splice_init(&fs_info->delalloc_roots, &splice);
while (!list_empty(&splice)) {
root = list_first_entry(&splice, struct btrfs_root,
delalloc_root);
root = btrfs_grab_fs_root(root);
BUG_ON(!root);
list_move_tail(&root->delalloc_root,
&fs_info->delalloc_roots);
spin_unlock(&fs_info->delalloc_root_lock);
ret = __start_delalloc_inodes(root, delay_iput);
btrfs_put_fs_root(root);
if (ret)
goto out;
spin_lock(&fs_info->delalloc_root_lock);
}
spin_unlock(&fs_info->delalloc_root_lock);
atomic_inc(&fs_info->async_submit_draining);
while (atomic_read(&fs_info->nr_async_submits) ||
atomic_read(&fs_info->async_delalloc_pages)) {
wait_event(fs_info->async_submit_wait,
(atomic_read(&fs_info->nr_async_submits) == 0 &&
atomic_read(&fs_info->async_delalloc_pages) == 0));
}
atomic_dec(&fs_info->async_submit_draining);
return 0;
out:
list_for_each_entry_safe(work, next, &works, list) {
list_del_init(&work->list);
btrfs_wait_and_free_delalloc_work(work);
}
if (!list_empty_careful(&splice)) {
spin_lock(&root->fs_info->delalloc_lock);
list_splice_tail(&splice, &root->fs_info->delalloc_inodes);
spin_unlock(&root->fs_info->delalloc_lock);
spin_lock(&fs_info->delalloc_root_lock);
list_splice_tail(&splice, &fs_info->delalloc_roots);
spin_unlock(&fs_info->delalloc_root_lock);
}
return ret;
}

2
fs/btrfs/relocation.c
View File

@ -4159,7 +4159,7 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start)
(unsigned long long)rc->block_group->key.objectid,
(unsigned long long)rc->block_group->flags);
ret = btrfs_start_delalloc_inodes(fs_info->tree_root, 0);
ret = btrfs_start_all_delalloc_inodes(fs_info, 0);
if (ret < 0) {
err = ret;
goto out;

2
fs/btrfs/transaction.c
View File

@ -1502,7 +1502,7 @@ static int btrfs_flush_all_pending_stuffs(struct btrfs_trans_handle *trans,
}
if (flush_on_commit || snap_pending) {
ret = btrfs_start_delalloc_inodes(root, 1);
ret = btrfs_start_all_delalloc_inodes(root->fs_info, 1);
if (ret)
return ret;
btrfs_wait_ordered_extents(root, 1);