diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/namei.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/linux/namei.h b/include/linux/namei.h index fed86221c69c..3f92c1a16878 100644 --- a/include/linux/namei.h +++ b/include/linux/namei.h @@ -88,6 +88,39 @@ struct dentry *lookup_one_positive_killable(struct mnt_idmap *idmap, struct qstr *name, struct dentry *base); +struct dentry *start_creating(struct mnt_idmap *idmap, struct dentry *parent, + struct qstr *name); + +/** + * end_creating - finish action started with start_creating + * @child: dentry returned by start_creating() or vfs_mkdir() + * @parent: dentry given to start_creating(), + * + * Unlock and release the child. + * + * Unlike end_dirop() this can only be called if start_creating() succeeded. + * It handles @child being and error as vfs_mkdir() might have converted the + * dentry to an error - in that case the parent still needs to be unlocked. + * + * If vfs_mkdir() was called then the value returned from that function + * should be given for @child rather than the original dentry, as vfs_mkdir() + * may have provided a new dentry. Even if vfs_mkdir() returns an error + * it must be given to end_creating(). + * + * If vfs_mkdir() was not called, then @child will be a valid dentry and + * @parent will be ignored. + */ +static inline void end_creating(struct dentry *child, struct dentry *parent) +{ + if (IS_ERR(child)) + /* The parent is still locked despite the error from + * vfs_mkdir() - must unlock it. + */ + inode_unlock(parent->d_inode); + else + end_dirop(child); +} + extern int follow_down_one(struct path *); extern int follow_down(struct path *path, unsigned int flags); extern int follow_up(struct path *); |