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Btrfs: use flags instead of the bool variants in delayed node 

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Miao Xie 2013-12-26 13:07:05 +08:00 committed by Chris Mason
parent a56dbd8940
commit 7cf35d91b4
2 changed files with 21 additions and 18 deletions
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33
fs/btrfs/delayed-inode.c
View File

@ -55,8 +55,7 @@ static inline void btrfs_init_delayed_node(
delayed_node->inode_id = inode_id;
atomic_set(&delayed_node->refs, 0);
delayed_node->count = 0;
delayed_node->in_list = 0;
delayed_node->inode_dirty = 0;
delayed_node->flags = 0;
delayed_node->ins_root = RB_ROOT;
delayed_node->del_root = RB_ROOT;
mutex_init(&delayed_node->mutex);
@ -172,7 +171,7 @@ static void btrfs_queue_delayed_node(struct btrfs_delayed_root *root,
int mod)
{
spin_lock(&root->lock);
if (node->in_list) {
if (test_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags)) {
if (!list_empty(&node->p_list))
list_move_tail(&node->p_list, &root->prepare_list);
else if (mod)
@ -182,7 +181,7 @@ static void btrfs_queue_delayed_node(struct btrfs_delayed_root *root,
list_add_tail(&node->p_list, &root->prepare_list);
atomic_inc(&node->refs); /* inserted into list */
root->nodes++;
node->in_list = 1;
set_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags);
}
spin_unlock(&root->lock);
}
@ -192,13 +191,13 @@ static void btrfs_dequeue_delayed_node(struct btrfs_delayed_root *root,
struct btrfs_delayed_node *node)
{
spin_lock(&root->lock);
if (node->in_list) {
if (test_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags)) {
root->nodes--;
atomic_dec(&node->refs); /* not in the list */
list_del_init(&node->n_list);
if (!list_empty(&node->p_list))
list_del_init(&node->p_list);
node->in_list = 0;
clear_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags);
}
spin_unlock(&root->lock);
}
@ -231,7 +230,8 @@ static struct btrfs_delayed_node *btrfs_next_delayed_node(
delayed_root = node->root->fs_info->delayed_root;
spin_lock(&delayed_root->lock);
if (!node->in_list) { /* not in the list */
if (!test_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags)) {
/* not in the list */
if (list_empty(&delayed_root->node_list))
goto out;
p = delayed_root->node_list.next;
@ -1004,9 +1004,10 @@ static void btrfs_release_delayed_inode(struct btrfs_delayed_node *delayed_node)
{
struct btrfs_delayed_root *delayed_root;
if (delayed_node && delayed_node->inode_dirty) {
if (delayed_node &&
test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) {
BUG_ON(!delayed_node->root);
delayed_node->inode_dirty = 0;
clear_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags);
delayed_node->count--;
delayed_root = delayed_node->root->fs_info->delayed_root;
@ -1059,7 +1060,7 @@ static inline int btrfs_update_delayed_inode(struct btrfs_trans_handle *trans,
int ret;
mutex_lock(&node->mutex);
if (!node->inode_dirty) {
if (!test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &node->flags)) {
mutex_unlock(&node->mutex);
return 0;
}
@ -1203,7 +1204,7 @@ int btrfs_commit_inode_delayed_inode(struct inode *inode)
return 0;
mutex_lock(&delayed_node->mutex);
if (!delayed_node->inode_dirty) {
if (!test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) {
mutex_unlock(&delayed_node->mutex);
btrfs_release_delayed_node(delayed_node);
return 0;
@ -1227,7 +1228,7 @@ int btrfs_commit_inode_delayed_inode(struct inode *inode)
trans->block_rsv = &delayed_node->root->fs_info->delayed_block_rsv;
mutex_lock(&delayed_node->mutex);
if (delayed_node->inode_dirty)
if (test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags))
ret = __btrfs_update_delayed_inode(trans, delayed_node->root,
path, delayed_node);
else
@ -1721,7 +1722,7 @@ int btrfs_fill_inode(struct inode *inode, u32 *rdev)
return -ENOENT;
mutex_lock(&delayed_node->mutex);
if (!delayed_node->inode_dirty) {
if (!test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) {
mutex_unlock(&delayed_node->mutex);
btrfs_release_delayed_node(delayed_node);
return -ENOENT;
@ -1772,7 +1773,7 @@ int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans,
return PTR_ERR(delayed_node);
mutex_lock(&delayed_node->mutex);
if (delayed_node->inode_dirty) {
if (test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) {
fill_stack_inode_item(trans, &delayed_node->inode_item, inode);
goto release_node;
}
@ -1783,7 +1784,7 @@ int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans,
goto release_node;
fill_stack_inode_item(trans, &delayed_node->inode_item, inode);
delayed_node->inode_dirty = 1;
set_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags);
delayed_node->count++;
atomic_inc(&root->fs_info->delayed_root->items);
release_node:
@ -1814,7 +1815,7 @@ static void __btrfs_kill_delayed_node(struct btrfs_delayed_node *delayed_node)
btrfs_release_delayed_item(prev_item);
}
if (delayed_node->inode_dirty) {
if (test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) {
btrfs_delayed_inode_release_metadata(root, delayed_node);
btrfs_release_delayed_inode(delayed_node);
}

6
fs/btrfs/delayed-inode.h
View File

@ -48,6 +48,9 @@ struct btrfs_delayed_root {
wait_queue_head_t wait;
};
#define BTRFS_DELAYED_NODE_IN_LIST 0
#define BTRFS_DELAYED_NODE_INODE_DIRTY 1
struct btrfs_delayed_node {
u64 inode_id;
u64 bytes_reserved;
@ -65,8 +68,7 @@ struct btrfs_delayed_node {
struct btrfs_inode_item inode_item;
atomic_t refs;
u64 index_cnt;
bool in_list;
bool inode_dirty;
unsigned long flags;
int count;
};