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Btrfs: get rid of BTRFS_INODE_HAS_ORPHAN_ITEM 

Now that we don't add orphan items for truncate, there can't be races on
adding or deleting an orphan item, so this bit is unnecessary.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Omar Sandoval 2018-05-11 13:13:33 -07:00 committed by David Sterba
parent f7e9e8fc79
commit 7b40b695b4
2 changed files with 20 additions and 57 deletions
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1
fs/btrfs/btrfs_inode.h
View File

@ -23,7 +23,6 @@
#define BTRFS_INODE_ORPHAN_META_RESERVED 1
#define BTRFS_INODE_DUMMY 2
#define BTRFS_INODE_IN_DEFRAG 3
#define BTRFS_INODE_HAS_ORPHAN_ITEM 4
#define BTRFS_INODE_HAS_ASYNC_EXTENT 5
#define BTRFS_INODE_NEEDS_FULL_SYNC 6
#define BTRFS_INODE_COPY_EVERYTHING 7

76
fs/btrfs/inode.c
View File

@ -3359,7 +3359,6 @@ int btrfs_orphan_add(struct btrfs_trans_handle *trans,
struct btrfs_root *root = inode->root;
struct btrfs_block_rsv *block_rsv = NULL;
int reserve = 0;
bool insert = false;
int ret;
if (!root->orphan_block_rsv) {
@ -3369,10 +3368,6 @@ int btrfs_orphan_add(struct btrfs_trans_handle *trans,
return -ENOMEM;
}
if (!test_and_set_bit(BTRFS_INODE_HAS_ORPHAN_ITEM,
&inode->runtime_flags))
insert = true;
if (!test_and_set_bit(BTRFS_INODE_ORPHAN_META_RESERVED,
&inode->runtime_flags))
reserve = 1;
@ -3386,8 +3381,7 @@ int btrfs_orphan_add(struct btrfs_trans_handle *trans,
block_rsv = NULL;
}
if (insert)
atomic_inc(&root->orphan_inodes);
atomic_inc(&root->orphan_inodes);
spin_unlock(&root->orphan_lock);
/* grab metadata reservation from transaction handle */
@ -3403,36 +3397,28 @@ int btrfs_orphan_add(struct btrfs_trans_handle *trans,
atomic_dec(&root->orphan_inodes);
clear_bit(BTRFS_INODE_ORPHAN_META_RESERVED,
&inode->runtime_flags);
if (insert)
clear_bit(BTRFS_INODE_HAS_ORPHAN_ITEM,
&inode->runtime_flags);
return ret;
}
}
/* insert an orphan item to track this unlinked file */
if (insert) {
ret = btrfs_insert_orphan_item(trans, root, btrfs_ino(inode));
if (ret) {
if (reserve) {
clear_bit(BTRFS_INODE_ORPHAN_META_RESERVED,
&inode->runtime_flags);
btrfs_orphan_release_metadata(inode);
}
/*
* btrfs_orphan_commit_root may race with us and set
* ->orphan_block_rsv to zero, in order to avoid that,
* decrease ->orphan_inodes after everything is done.
*/
atomic_dec(&root->orphan_inodes);
if (ret != -EEXIST) {
clear_bit(BTRFS_INODE_HAS_ORPHAN_ITEM,
&inode->runtime_flags);
btrfs_abort_transaction(trans, ret);
return ret;
}
ret = btrfs_insert_orphan_item(trans, root, btrfs_ino(inode));
if (ret) {
if (reserve) {
clear_bit(BTRFS_INODE_ORPHAN_META_RESERVED,
&inode->runtime_flags);
btrfs_orphan_release_metadata(inode);
}
/*
* btrfs_orphan_commit_root may race with us and set
* ->orphan_block_rsv to zero, in order to avoid that,
* decrease ->orphan_inodes after everything is done.
*/
atomic_dec(&root->orphan_inodes);
if (ret != -EEXIST) {
btrfs_abort_transaction(trans, ret);
return ret;
}
ret = 0;
}
return 0;
@ -3446,14 +3432,9 @@ static int btrfs_orphan_del(struct btrfs_trans_handle *trans,
struct btrfs_inode *inode)
{
struct btrfs_root *root = inode->root;
int delete_item = 0;
int ret = 0;
if (test_and_clear_bit(BTRFS_INODE_HAS_ORPHAN_ITEM,
&inode->runtime_flags))
delete_item = 1;
if (delete_item && trans)
if (trans)
ret = btrfs_del_orphan_item(trans, root, btrfs_ino(inode));
if (test_and_clear_bit(BTRFS_INODE_ORPHAN_META_RESERVED,
@ -3465,8 +3446,7 @@ static int btrfs_orphan_del(struct btrfs_trans_handle *trans,
* to zero, in order to avoid that, decrease ->orphan_inodes after
* everything is done.
*/
if (delete_item)
atomic_dec(&root->orphan_inodes);
atomic_dec(&root->orphan_inodes);
return ret;
}
@ -3624,12 +3604,6 @@ int btrfs_orphan_cleanup(struct btrfs_root *root)
continue;
}
/*
* add this inode to the orphan list so btrfs_orphan_del does
* the proper thing when we hit it
*/
set_bit(BTRFS_INODE_HAS_ORPHAN_ITEM,
&BTRFS_I(inode)->runtime_flags);
atomic_inc(&root->orphan_inodes);
nr_unlink++;
@ -5527,11 +5501,8 @@ void btrfs_evict_inode(struct inode *inode)
btrfs_free_io_failure_record(BTRFS_I(inode), 0, (u64)-1);
if (test_bit(BTRFS_FS_LOG_RECOVERING, &fs_info->flags)) {
BUG_ON(test_bit(BTRFS_INODE_HAS_ORPHAN_ITEM,
&BTRFS_I(inode)->runtime_flags));
if (test_bit(BTRFS_FS_LOG_RECOVERING, &fs_info->flags))
goto no_delete;
}
if (inode->i_nlink > 0) {
BUG_ON(btrfs_root_refs(&root->root_item) != 0 &&
@ -9442,13 +9413,6 @@ void btrfs_destroy_inode(struct inode *inode)
if (!root)
goto free;
if (test_bit(BTRFS_INODE_HAS_ORPHAN_ITEM,
&BTRFS_I(inode)->runtime_flags)) {
btrfs_info(fs_info, "inode %llu still on the orphan list",
btrfs_ino(BTRFS_I(inode)));
atomic_dec(&root->orphan_inodes);
}
while (1) {
ordered = btrfs_lookup_first_ordered_extent(inode, (u64)-1);
if (!ordered)