18 int ovl_want_write(struct dentry *dentry)  in ovl_want_write()  argument
20 	struct ovl_fs *ofs = dentry->d_sb->s_fs_info;  in ovl_want_write()
24 void ovl_drop_write(struct dentry *dentry)  in ovl_drop_write()  argument
26 	struct ovl_fs *ofs = dentry->d_sb->s_fs_info;  in ovl_drop_write()
30 struct dentry *ovl_workdir(struct dentry *dentry)  in ovl_workdir()  argument
32 	struct ovl_fs *ofs = dentry->d_sb->s_fs_info;  in ovl_workdir()
67 struct dentry *ovl_indexdir(struct super_block *sb)  in ovl_indexdir()
101 bool ovl_dentry_remote(struct dentry *dentry)  in ovl_dentry_remote()  argument
103 	return dentry->d_flags &  in ovl_dentry_remote()
107 void ovl_dentry_update_reval(struct dentry *dentry, struct dentry *upperdentry,  in ovl_dentry_update_reval()  argument
110 	struct ovl_entry *oe = OVL_E(dentry);  in ovl_dentry_update_reval()
116 		flags |= oe->lowerstack[i].dentry->d_flags;  in ovl_dentry_update_reval()
118 	spin_lock(&dentry->d_lock);  in ovl_dentry_update_reval()
119 	dentry->d_flags &= ~mask;  in ovl_dentry_update_reval()
120 	dentry->d_flags |= flags & mask;  in ovl_dentry_update_reval()
121 	spin_unlock(&dentry->d_lock);  in ovl_dentry_update_reval()
124 bool ovl_dentry_weird(struct dentry *dentry)  in ovl_dentry_weird()  argument
126 	return dentry->d_flags & (DCACHE_NEED_AUTOMOUNT |  in ovl_dentry_weird()
132 enum ovl_path_type ovl_path_type(struct dentry *dentry)  in ovl_path_type()  argument
134 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_path_type()
137 	if (ovl_dentry_upper(dentry)) {  in ovl_path_type()
144 			if (ovl_test_flag(OVL_CONST_INO, d_inode(dentry)))  in ovl_path_type()
146 			if (d_is_dir(dentry) ||  in ovl_path_type()
147 			    !ovl_has_upperdata(d_inode(dentry)))  in ovl_path_type()
157 void ovl_path_upper(struct dentry *dentry, struct path *path)  in ovl_path_upper()  argument
159 	struct ovl_fs *ofs = dentry->d_sb->s_fs_info;  in ovl_path_upper()
162 	path->dentry = ovl_dentry_upper(dentry);  in ovl_path_upper()
165 void ovl_path_lower(struct dentry *dentry, struct path *path)  in ovl_path_lower()  argument
167 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_path_lower()
171 		path->dentry = oe->lowerstack[0].dentry;  in ovl_path_lower()
177 void ovl_path_lowerdata(struct dentry *dentry, struct path *path)  in ovl_path_lowerdata()  argument
179 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_path_lowerdata()
183 		path->dentry = oe->lowerstack[oe->numlower - 1].dentry;  in ovl_path_lowerdata()
189 enum ovl_path_type ovl_path_real(struct dentry *dentry, struct path *path)  in ovl_path_real()  argument
191 	enum ovl_path_type type = ovl_path_type(dentry);  in ovl_path_real()
194 		ovl_path_lower(dentry, path);  in ovl_path_real()
196 		ovl_path_upper(dentry, path);  in ovl_path_real()
201 struct dentry *ovl_dentry_upper(struct dentry *dentry)  in ovl_dentry_upper()  argument
203 	return ovl_upperdentry_dereference(OVL_I(d_inode(dentry)));  in ovl_dentry_upper()
206 struct dentry *ovl_dentry_lower(struct dentry *dentry)  in ovl_dentry_lower()  argument
208 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_dentry_lower()
210 	return oe->numlower ? oe->lowerstack[0].dentry : NULL;  in ovl_dentry_lower()
213 const struct ovl_layer *ovl_layer_lower(struct dentry *dentry)  in ovl_layer_lower()  argument
215 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_layer_lower()
226 struct dentry *ovl_dentry_lowerdata(struct dentry *dentry)  in ovl_dentry_lowerdata()  argument
228 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_dentry_lowerdata()
230 	return oe->numlower ? oe->lowerstack[oe->numlower - 1].dentry : NULL;  in ovl_dentry_lowerdata()
233 struct dentry *ovl_dentry_real(struct dentry *dentry)  in ovl_dentry_real()  argument
235 	return ovl_dentry_upper(dentry) ?: ovl_dentry_lower(dentry);  in ovl_dentry_real()
238 struct dentry *ovl_i_dentry_upper(struct inode *inode)  in ovl_i_dentry_upper()
245 	struct dentry *upperdentry = ovl_i_dentry_upper(inode);  in ovl_inode_upper()
291 void ovl_dentry_set_flag(unsigned long flag, struct dentry *dentry)  in ovl_dentry_set_flag()  argument
293 	set_bit(flag, &OVL_E(dentry)->flags);  in ovl_dentry_set_flag()
296 void ovl_dentry_clear_flag(unsigned long flag, struct dentry *dentry)  in ovl_dentry_clear_flag()  argument
298 	clear_bit(flag, &OVL_E(dentry)->flags);  in ovl_dentry_clear_flag()
301 bool ovl_dentry_test_flag(unsigned long flag, struct dentry *dentry)  in ovl_dentry_test_flag()  argument
303 	return test_bit(flag, &OVL_E(dentry)->flags);  in ovl_dentry_test_flag()
306 bool ovl_dentry_is_opaque(struct dentry *dentry)  in ovl_dentry_is_opaque()  argument
308 	return ovl_dentry_test_flag(OVL_E_OPAQUE, dentry);  in ovl_dentry_is_opaque()
311 bool ovl_dentry_is_whiteout(struct dentry *dentry)  in ovl_dentry_is_whiteout()  argument
313 	return !dentry->d_inode && ovl_dentry_is_opaque(dentry);  in ovl_dentry_is_whiteout()
316 void ovl_dentry_set_opaque(struct dentry *dentry)  in ovl_dentry_set_opaque()  argument
318 	ovl_dentry_set_flag(OVL_E_OPAQUE, dentry);  in ovl_dentry_set_opaque()
327 bool ovl_dentry_has_upper_alias(struct dentry *dentry)  in ovl_dentry_has_upper_alias()  argument
329 	return ovl_dentry_test_flag(OVL_E_UPPER_ALIAS, dentry);  in ovl_dentry_has_upper_alias()
332 void ovl_dentry_set_upper_alias(struct dentry *dentry)  in ovl_dentry_set_upper_alias()  argument
334 	ovl_dentry_set_flag(OVL_E_UPPER_ALIAS, dentry);  in ovl_dentry_set_upper_alias()
377 bool ovl_dentry_needs_data_copy_up_locked(struct dentry *dentry, int flags)  in ovl_dentry_needs_data_copy_up_locked()  argument
382 	return !ovl_test_flag(OVL_UPPERDATA, d_inode(dentry));  in ovl_dentry_needs_data_copy_up_locked()
385 bool ovl_dentry_needs_data_copy_up(struct dentry *dentry, int flags)  in ovl_dentry_needs_data_copy_up()  argument
390 	return !ovl_has_upperdata(d_inode(dentry));  in ovl_dentry_needs_data_copy_up()
400 const char *ovl_dentry_get_redirect(struct dentry *dentry)  in ovl_dentry_get_redirect()  argument
402 	return OVL_I(d_inode(dentry))->redirect;  in ovl_dentry_get_redirect()
405 void ovl_dentry_set_redirect(struct dentry *dentry, const char *redirect)  in ovl_dentry_set_redirect()  argument
407 	struct ovl_inode *oi = OVL_I(d_inode(dentry));  in ovl_dentry_set_redirect()
413 void ovl_inode_update(struct inode *inode, struct dentry *upperdentry)  in ovl_inode_update()
430 static void ovl_dir_version_inc(struct dentry *dentry, bool impurity)  in ovl_dir_version_inc()  argument
432 	struct inode *inode = d_inode(dentry);  in ovl_dir_version_inc()
435 	WARN_ON(!d_is_dir(dentry));  in ovl_dir_version_inc()
443 	if (!ovl_dir_is_real(dentry) || impurity)  in ovl_dir_version_inc()
447 void ovl_dir_modified(struct dentry *dentry, bool impurity)  in ovl_dir_modified()  argument
450 	ovl_copyattr(d_inode(ovl_dentry_upper(dentry)), d_inode(dentry));  in ovl_dir_modified()
452 	ovl_dir_version_inc(dentry, impurity);  in ovl_dir_modified()
455 u64 ovl_dentry_version_get(struct dentry *dentry)  in ovl_dentry_version_get()  argument
457 	struct inode *inode = d_inode(dentry);  in ovl_dentry_version_get()
463 bool ovl_is_whiteout(struct dentry *dentry)  in ovl_is_whiteout()  argument
465 	struct inode *inode = dentry->d_inode;  in ovl_is_whiteout()
472 	struct inode *inode = d_inode(path->dentry);  in ovl_path_open()
501 static bool ovl_already_copied_up_locked(struct dentry *dentry, int flags)  in ovl_already_copied_up_locked()  argument
503 	bool disconnected = dentry->d_flags & DCACHE_DISCONNECTED;  in ovl_already_copied_up_locked()
505 	if (ovl_dentry_upper(dentry) &&  in ovl_already_copied_up_locked()
506 	    (ovl_dentry_has_upper_alias(dentry) || disconnected) &&  in ovl_already_copied_up_locked()
507 	    !ovl_dentry_needs_data_copy_up_locked(dentry, flags))  in ovl_already_copied_up_locked()
513 bool ovl_already_copied_up(struct dentry *dentry, int flags)  in ovl_already_copied_up()  argument
515 	bool disconnected = dentry->d_flags & DCACHE_DISCONNECTED;  in ovl_already_copied_up()
530 	if (ovl_dentry_upper(dentry) &&  in ovl_already_copied_up()
531 	    (ovl_dentry_has_upper_alias(dentry) || disconnected) &&  in ovl_already_copied_up()
532 	    !ovl_dentry_needs_data_copy_up(dentry, flags))  in ovl_already_copied_up()
538 int ovl_copy_up_start(struct dentry *dentry, int flags)  in ovl_copy_up_start()  argument
540 	struct inode *inode = d_inode(dentry);  in ovl_copy_up_start()
544 	if (!err && ovl_already_copied_up_locked(dentry, flags)) {  in ovl_copy_up_start()
552 void ovl_copy_up_end(struct dentry *dentry)  in ovl_copy_up_end()  argument
554 	ovl_inode_unlock(d_inode(dentry));  in ovl_copy_up_end()
557 bool ovl_check_origin_xattr(struct ovl_fs *ofs, struct dentry *dentry)  in ovl_check_origin_xattr()  argument
561 	res = ovl_do_getxattr(ofs, dentry, OVL_XATTR_ORIGIN, NULL, 0);  in ovl_check_origin_xattr()
570 bool ovl_check_dir_xattr(struct super_block *sb, struct dentry *dentry,  in ovl_check_dir_xattr()  argument
576 	if (!d_is_dir(dentry))  in ovl_check_dir_xattr()
579 	res = ovl_do_getxattr(OVL_FS(sb), dentry, ox, &val, 1);  in ovl_check_dir_xattr()
607 int ovl_check_setxattr(struct dentry *dentry, struct dentry *upperdentry,  in ovl_check_setxattr()  argument
612 	struct ovl_fs *ofs = dentry->d_sb->s_fs_info;  in ovl_check_setxattr()
628 int ovl_set_impure(struct dentry *dentry, struct dentry *upperdentry)  in ovl_set_impure()  argument
632 	if (ovl_test_flag(OVL_IMPURE, d_inode(dentry)))  in ovl_set_impure()
639 	err = ovl_check_setxattr(dentry, upperdentry, OVL_XATTR_IMPURE,  in ovl_set_impure()
642 		ovl_set_flag(OVL_IMPURE, d_inode(dentry));  in ovl_set_impure()
651 bool ovl_inuse_trylock(struct dentry *dentry)  in ovl_inuse_trylock()  argument
653 	struct inode *inode = d_inode(dentry);  in ovl_inuse_trylock()
666 void ovl_inuse_unlock(struct dentry *dentry)  in ovl_inuse_unlock()  argument
668 	if (dentry) {  in ovl_inuse_unlock()
669 		struct inode *inode = d_inode(dentry);  in ovl_inuse_unlock()
678 bool ovl_is_inuse(struct dentry *dentry)  in ovl_is_inuse()  argument
680 	struct inode *inode = d_inode(dentry);  in ovl_is_inuse()
693 bool ovl_need_index(struct dentry *dentry)  in ovl_need_index()  argument
695 	struct dentry *lower = ovl_dentry_lower(dentry);  in ovl_need_index()
697 	if (!lower || !ovl_indexdir(dentry->d_sb))  in ovl_need_index()
701 	if (ovl_index_all(dentry->d_sb))  in ovl_need_index()
712 static void ovl_cleanup_index(struct dentry *dentry)  in ovl_cleanup_index()  argument
714 	struct dentry *indexdir = ovl_indexdir(dentry->d_sb);  in ovl_cleanup_index()
716 	struct dentry *lowerdentry = ovl_dentry_lower(dentry);  in ovl_cleanup_index()
717 	struct dentry *upperdentry = ovl_dentry_upper(dentry);  in ovl_cleanup_index()
718 	struct dentry *index = NULL;  in ovl_cleanup_index()
740 		set_nlink(d_inode(dentry), inode->i_nlink - 1);  in ovl_cleanup_index()
741 		ovl_set_nlink_upper(dentry);  in ovl_cleanup_index()
750 	} else if (ovl_index_all(dentry->d_sb)) {  in ovl_cleanup_index()
752 		err = ovl_cleanup_and_whiteout(OVL_FS(dentry->d_sb),  in ovl_cleanup_index()
769 	pr_err("cleanup index of '%pd2' failed (%i)\n", dentry, err);  in ovl_cleanup_index()
777 int ovl_nlink_start(struct dentry *dentry)  in ovl_nlink_start()  argument
779 	struct inode *inode = d_inode(dentry);  in ovl_nlink_start()
800 	if (ovl_need_index(dentry) && !ovl_dentry_has_upper_alias(dentry)) {  in ovl_nlink_start()
801 		err = ovl_copy_up(dentry);  in ovl_nlink_start()
810 	if (d_is_dir(dentry) || !ovl_test_flag(OVL_INDEX, inode))  in ovl_nlink_start()
813 	old_cred = ovl_override_creds(dentry->d_sb);  in ovl_nlink_start()
820 	err = ovl_set_nlink_upper(dentry);  in ovl_nlink_start()
821 	ovl_revert_creds(dentry->d_sb, old_cred);  in ovl_nlink_start()
830 void ovl_nlink_end(struct dentry *dentry)  in ovl_nlink_end()  argument
832 	struct inode *inode = d_inode(dentry);  in ovl_nlink_end()
837 		old_cred = ovl_override_creds(dentry->d_sb);  in ovl_nlink_end()
838 		ovl_cleanup_index(dentry);  in ovl_nlink_end()
839 		ovl_revert_creds(dentry->d_sb, old_cred);  in ovl_nlink_end()
845 int ovl_lock_rename_workdir(struct dentry *workdir, struct dentry *upperdir)  in ovl_lock_rename_workdir()
865 int ovl_check_metacopy_xattr(struct ovl_fs *ofs, struct dentry *dentry)  in ovl_check_metacopy_xattr()  argument
870 	if (!S_ISREG(d_inode(dentry)->i_mode))  in ovl_check_metacopy_xattr()
873 	res = ovl_do_getxattr(ofs, dentry, OVL_XATTR_METACOPY, NULL, 0);  in ovl_check_metacopy_xattr()
886 bool ovl_is_metacopy_dentry(struct dentry *dentry)  in ovl_is_metacopy_dentry()  argument
888 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_is_metacopy_dentry()
890 	if (!d_is_reg(dentry))  in ovl_is_metacopy_dentry()
893 	if (ovl_dentry_upper(dentry)) {  in ovl_is_metacopy_dentry()
894 		if (!ovl_has_upperdata(d_inode(dentry)))  in ovl_is_metacopy_dentry()
902 char *ovl_get_redirect_xattr(struct ovl_fs *ofs, struct dentry *dentry,  in ovl_get_redirect_xattr()  argument
908 	res = ovl_do_getxattr(ofs, dentry, OVL_XATTR_REDIRECT, NULL, 0);  in ovl_get_redirect_xattr()
920 	res = ovl_do_getxattr(ofs, dentry, OVL_XATTR_REDIRECT, buf, res);  in ovl_get_redirect_xattr()