udf: Fix file counting in LVID

numFiles entry in LVID should actually contain number for non-dir file
entries, not the number of non-dir inodes. Move the counting from inode
allocation / deallocation into directory entry handling functions.
Signed-off-by: Jan Kara <jack@suse.cz>

fs/udf/ialloc.c

@@ -28,21 +28,7 @@
 
 void udf_free_inode(struct inode *inode)
 {
-	struct super_block *sb = inode->i_sb;
-	struct udf_sb_info *sbi = UDF_SB(sb);
-	struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
-
-	if (lvidiu) {
-		mutex_lock(&sbi->s_alloc_mutex);
-		if (S_ISDIR(inode->i_mode))
-			le32_add_cpu(&lvidiu->numDirs, -1);
-		else
-			le32_add_cpu(&lvidiu->numFiles, -1);
-		udf_updated_lvid(sb);
-		mutex_unlock(&sbi->s_alloc_mutex);
-	}
-
-	udf_free_blocks(sb, NULL, &UDF_I(inode)->i_location, 0, 1);
+	udf_free_blocks(inode->i_sb, NULL, &UDF_I(inode)->i_location, 0, 1);
 }
 
 struct inode *udf_new_inode(struct inode *dir, umode_t mode)
@@ -54,7 +40,6 @@ struct inode *udf_new_inode(struct inode *dir, umode_t mode)
 	uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
 	struct udf_inode_info *iinfo;
 	struct udf_inode_info *dinfo = UDF_I(dir);
-	struct logicalVolIntegrityDescImpUse *lvidiu;
 	int err;
 
 	inode = new_inode(sb);
@@ -92,18 +77,8 @@ struct inode *udf_new_inode(struct inode *dir, umode_t mode)
 		return ERR_PTR(err);
 	}
 
-	lvidiu = udf_sb_lvidiu(sb);
-	if (lvidiu) {
-		iinfo->i_unique = lvid_get_unique_id(sb);
-		inode->i_generation = iinfo->i_unique;
-		mutex_lock(&sbi->s_alloc_mutex);
-		if (S_ISDIR(mode))
-			le32_add_cpu(&lvidiu->numDirs, 1);
-		else
-			le32_add_cpu(&lvidiu->numFiles, 1);
-		udf_updated_lvid(sb);
-		mutex_unlock(&sbi->s_alloc_mutex);
-	}
+	iinfo->i_unique = lvid_get_unique_id(sb);
+	inode->i_generation = iinfo->i_unique;
 
 	inode_init_owner(&init_user_ns, inode, dir, mode);
 	if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))

fs/udf/namei.c

@@ -336,6 +336,21 @@ static void udf_fiiter_delete_entry(struct udf_fileident_iter *iter)
 	udf_fiiter_write_fi(iter, NULL);
 }
 
+static void udf_add_fid_counter(struct super_block *sb, bool dir, int val)
+{
+	struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
+
+	if (!lvidiu)
+		return;
+	mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
+	if (dir)
+		le32_add_cpu(&lvidiu->numDirs, val);
+	else
+		le32_add_cpu(&lvidiu->numFiles, val);
+	udf_updated_lvid(sb);
+	mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
+}
+
 static int udf_add_nondir(struct dentry *dentry, struct inode *inode)
 {
 	struct udf_inode_info *iinfo = UDF_I(inode);
@@ -357,6 +372,7 @@ static int udf_add_nondir(struct dentry *dentry, struct inode *inode)
 	dir->i_ctime = dir->i_mtime = current_time(dir);
 	mark_inode_dirty(dir);
 	udf_fiiter_release(&iter);
+	udf_add_fid_counter(dir->i_sb, false, 1);
 	d_instantiate_new(dentry, inode);
 
 	return 0;
@@ -457,6 +473,7 @@ static int udf_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
 	iter.fi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
 	udf_fiiter_write_fi(&iter, NULL);
 	udf_fiiter_release(&iter);
+	udf_add_fid_counter(dir->i_sb, true, 1);
 	inc_nlink(dir);
 	dir->i_ctime = dir->i_mtime = current_time(dir);
 	mark_inode_dirty(dir);
@@ -509,6 +526,7 @@ static int udf_rmdir(struct inode *dir, struct dentry *dentry)
 	clear_nlink(inode);
 	inode->i_size = 0;
 	inode_dec_link_count(dir);
+	udf_add_fid_counter(dir->i_sb, true, -1);
 	inode->i_ctime = dir->i_ctime = dir->i_mtime =
 						current_time(inode);
 	mark_inode_dirty(dir);
@@ -544,6 +562,7 @@ static int udf_unlink(struct inode *dir, struct dentry *dentry)
 	dir->i_ctime = dir->i_mtime = current_time(dir);
 	mark_inode_dirty(dir);
 	inode_dec_link_count(inode);
+	udf_add_fid_counter(dir->i_sb, false, -1);
 	inode->i_ctime = dir->i_ctime;
 	ret = 0;
 end_unlink:
@@ -730,6 +749,7 @@ static int udf_link(struct dentry *old_dentry, struct inode *dir,
 	udf_fiiter_release(&iter);
 
 	inc_nlink(inode);
+	udf_add_fid_counter(dir->i_sb, false, 1);
 	inode->i_ctime = current_time(inode);
 	mark_inode_dirty(inode);
 	dir->i_ctime = dir->i_mtime = current_time(dir);
@@ -854,6 +874,8 @@ static int udf_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
 	if (new_inode) {
 		new_inode->i_ctime = current_time(new_inode);
 		inode_dec_link_count(new_inode);
+		udf_add_fid_counter(old_dir->i_sb, S_ISDIR(new_inode->i_mode),
+				    -1);
 	}
 	old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
 	new_dir->i_ctime = new_dir->i_mtime = current_time(new_dir);