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convert btrfs to ->evict_inode()

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NB: do we want btrfs_wait_ordered_range() on eviction of
inodes with positive i_nlink on subvolume with zero root_refs?
If not, btrfs_evict_inode() can be simplified by unconditionally
bailing out in case of i_nlink > 0 in the very beginning...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2010-06-07 11:35:40 -04:00
parent d5c1515cf3
commit bd55597520
3 changed files with 8 additions and 4 deletions
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2
fs/btrfs/ctree.h
View file

@ -2389,7 +2389,7 @@ unsigned long btrfs_force_ra(struct address_space *mapping,
pgoff_t offset, pgoff_t last_index);
int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
int btrfs_readpage(struct file *file, struct page *page);
void btrfs_delete_inode(struct inode *inode);
void btrfs_evict_inode(struct inode *inode);
void btrfs_put_inode(struct inode *inode);
int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
void btrfs_dirty_inode(struct inode *inode);

8
fs/btrfs/inode.c
View file

@ -3668,7 +3668,7 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
return err;
}
void btrfs_delete_inode(struct inode *inode)
void btrfs_evict_inode(struct inode *inode)
{
struct btrfs_trans_handle *trans;
struct btrfs_root *root = BTRFS_I(inode)->root;
@ -3676,10 +3676,14 @@ void btrfs_delete_inode(struct inode *inode)
int ret;
truncate_inode_pages(&inode->i_data, 0);
if (inode->i_nlink && btrfs_root_refs(&root->root_item) != 0)
goto no_delete;
if (is_bad_inode(inode)) {
btrfs_orphan_del(NULL, inode);
goto no_delete;
}
/* do we really want it for ->i_nlink > 0 and zero btrfs_root_refs? */
btrfs_wait_ordered_range(inode, 0, (u64)-1);
if (root->fs_info->log_root_recovering) {
@ -3729,7 +3733,7 @@ void btrfs_delete_inode(struct inode *inode)
btrfs_end_transaction(trans, root);
btrfs_btree_balance_dirty(root, nr);
no_delete:
clear_inode(inode);
end_writeback(inode);
return;
}

2
fs/btrfs/super.c
View file

@ -797,7 +797,7 @@ static int btrfs_unfreeze(struct super_block *sb)
static const struct super_operations btrfs_super_ops = {
.drop_inode = btrfs_drop_inode,
.delete_inode = btrfs_delete_inode,
.evict_inode = btrfs_evict_inode,
.put_super = btrfs_put_super,
.sync_fs = btrfs_sync_fs,
.show_options = btrfs_show_options,