nilfs2: decrement inodes count only if raw inode was successfully deleted

This fixes the issue that inodes count will not add up after removal
of raw inodes fails.  Hence, this prevents possible under flow of the
inodes count.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 2fd440d8d6b8d9b2b469c2aaec757bca05a9ac58..3a6967d14e1c0270ab2236dbd33fdf9ebd1c7939 100644 (file)
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -707,6 +707,7 @@ void nilfs_evict_inode(struct inode *inode)
        struct nilfs_transaction_info ti;
        struct super_block *sb = inode->i_sb;
        struct nilfs_inode_info *ii = NILFS_I(inode);
+       int ret;
 
        if (inode->i_nlink || !ii->i_root || unlikely(is_bad_inode(inode))) {
                if (inode->i_data.nrpages)
@@ -725,8 +726,9 @@ void nilfs_evict_inode(struct inode *inode)
        nilfs_mark_inode_dirty(inode);
        end_writeback(inode);
 
-       nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino);
-       atomic_dec(&ii->i_root->inodes_count);
+       ret = nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino);
+       if (!ret)
+               atomic_dec(&ii->i_root->inodes_count);
 
        nilfs_clear_inode(inode);