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()
71 struct dentry *ovl_indexdir(struct super_block *sb)  in ovl_indexdir()
105 bool ovl_dentry_remote(struct dentry *dentry)  in ovl_dentry_remote()  argument
107 	return dentry->d_flags &  in ovl_dentry_remote()
112 bool ovl_dentry_weird(struct dentry *dentry)  in ovl_dentry_weird()  argument
114 	return dentry->d_flags & (DCACHE_NEED_AUTOMOUNT |  in ovl_dentry_weird()
120 enum ovl_path_type ovl_path_type(struct dentry *dentry)  in ovl_path_type()  argument
122 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_path_type()
125 	if (ovl_dentry_upper(dentry)) {  in ovl_path_type()
132 			if (ovl_test_flag(OVL_CONST_INO, d_inode(dentry)))  in ovl_path_type()
134 			if (d_is_dir(dentry) ||  in ovl_path_type()
135 			    !ovl_has_upperdata(d_inode(dentry)))  in ovl_path_type()
145 void ovl_path_upper(struct dentry *dentry, struct path *path)  in ovl_path_upper()  argument
147 	struct ovl_fs *ofs = dentry->d_sb->s_fs_info;  in ovl_path_upper()
150 	path->dentry = ovl_dentry_upper(dentry);  in ovl_path_upper()
153 void ovl_path_lower(struct dentry *dentry, struct path *path)  in ovl_path_lower()  argument
155 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_path_lower()
159 		path->dentry = oe->lowerstack[0].dentry;  in ovl_path_lower()
165 void ovl_path_lowerdata(struct dentry *dentry, struct path *path)  in ovl_path_lowerdata()  argument
167 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_path_lowerdata()
171 		path->dentry = oe->lowerstack[oe->numlower - 1].dentry;  in ovl_path_lowerdata()
177 enum ovl_path_type ovl_path_real(struct dentry *dentry, struct path *path)  in ovl_path_real()  argument
179 	enum ovl_path_type type = ovl_path_type(dentry);  in ovl_path_real()
182 		ovl_path_lower(dentry, path);  in ovl_path_real()
184 		ovl_path_upper(dentry, path);  in ovl_path_real()
189 struct dentry *ovl_dentry_upper(struct dentry *dentry)  in ovl_dentry_upper()  argument
191 	return ovl_upperdentry_dereference(OVL_I(d_inode(dentry)));  in ovl_dentry_upper()
194 struct dentry *ovl_dentry_lower(struct dentry *dentry)  in ovl_dentry_lower()  argument
196 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_dentry_lower()
198 	return oe->numlower ? oe->lowerstack[0].dentry : NULL;  in ovl_dentry_lower()
201 struct ovl_layer *ovl_layer_lower(struct dentry *dentry)  in ovl_layer_lower()  argument
203 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_layer_lower()
214 struct dentry *ovl_dentry_lowerdata(struct dentry *dentry)  in ovl_dentry_lowerdata()  argument
216 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_dentry_lowerdata()
218 	return oe->numlower ? oe->lowerstack[oe->numlower - 1].dentry : NULL;  in ovl_dentry_lowerdata()
221 struct dentry *ovl_dentry_real(struct dentry *dentry)  in ovl_dentry_real()  argument
223 	return ovl_dentry_upper(dentry) ?: ovl_dentry_lower(dentry);  in ovl_dentry_real()
226 struct dentry *ovl_i_dentry_upper(struct inode *inode)  in ovl_i_dentry_upper()
233 	struct dentry *upperdentry = ovl_i_dentry_upper(inode);  in ovl_inode_upper()
279 void ovl_dentry_set_flag(unsigned long flag, struct dentry *dentry)  in ovl_dentry_set_flag()  argument
281 	set_bit(flag, &OVL_E(dentry)->flags);  in ovl_dentry_set_flag()
284 void ovl_dentry_clear_flag(unsigned long flag, struct dentry *dentry)  in ovl_dentry_clear_flag()  argument
286 	clear_bit(flag, &OVL_E(dentry)->flags);  in ovl_dentry_clear_flag()
289 bool ovl_dentry_test_flag(unsigned long flag, struct dentry *dentry)  in ovl_dentry_test_flag()  argument
291 	return test_bit(flag, &OVL_E(dentry)->flags);  in ovl_dentry_test_flag()
294 bool ovl_dentry_is_opaque(struct dentry *dentry)  in ovl_dentry_is_opaque()  argument
296 	return ovl_dentry_test_flag(OVL_E_OPAQUE, dentry);  in ovl_dentry_is_opaque()
299 bool ovl_dentry_is_whiteout(struct dentry *dentry)  in ovl_dentry_is_whiteout()  argument
301 	return !dentry->d_inode && ovl_dentry_is_opaque(dentry);  in ovl_dentry_is_whiteout()
304 void ovl_dentry_set_opaque(struct dentry *dentry)  in ovl_dentry_set_opaque()  argument
306 	ovl_dentry_set_flag(OVL_E_OPAQUE, dentry);  in ovl_dentry_set_opaque()
315 bool ovl_dentry_has_upper_alias(struct dentry *dentry)  in ovl_dentry_has_upper_alias()  argument
317 	return ovl_dentry_test_flag(OVL_E_UPPER_ALIAS, dentry);  in ovl_dentry_has_upper_alias()
320 void ovl_dentry_set_upper_alias(struct dentry *dentry)  in ovl_dentry_set_upper_alias()  argument
322 	ovl_dentry_set_flag(OVL_E_UPPER_ALIAS, dentry);  in ovl_dentry_set_upper_alias()
365 bool ovl_dentry_needs_data_copy_up_locked(struct dentry *dentry, int flags)  in ovl_dentry_needs_data_copy_up_locked()  argument
370 	return !ovl_test_flag(OVL_UPPERDATA, d_inode(dentry));  in ovl_dentry_needs_data_copy_up_locked()
373 bool ovl_dentry_needs_data_copy_up(struct dentry *dentry, int flags)  in ovl_dentry_needs_data_copy_up()  argument
378 	return !ovl_has_upperdata(d_inode(dentry));  in ovl_dentry_needs_data_copy_up()
388 const char *ovl_dentry_get_redirect(struct dentry *dentry)  in ovl_dentry_get_redirect()  argument
390 	return OVL_I(d_inode(dentry))->redirect;  in ovl_dentry_get_redirect()
393 void ovl_dentry_set_redirect(struct dentry *dentry, const char *redirect)  in ovl_dentry_set_redirect()  argument
395 	struct ovl_inode *oi = OVL_I(d_inode(dentry));  in ovl_dentry_set_redirect()
401 void ovl_inode_init(struct inode *inode, struct dentry *upperdentry,  in ovl_inode_init()
402 		    struct dentry *lowerdentry, struct dentry *lowerdata)  in ovl_inode_init()
419 void ovl_inode_update(struct inode *inode, struct dentry *upperdentry)  in ovl_inode_update()
438 static void ovl_dentry_version_inc(struct dentry *dentry, bool impurity)  in ovl_dentry_version_inc()  argument
440 	struct inode *inode = d_inode(dentry);  in ovl_dentry_version_inc()
449 	if (OVL_TYPE_MERGE(ovl_path_type(dentry)) || impurity)  in ovl_dentry_version_inc()
453 void ovl_dir_modified(struct dentry *dentry, bool impurity)  in ovl_dir_modified()  argument
456 	ovl_copyattr(d_inode(ovl_dentry_upper(dentry)), d_inode(dentry));  in ovl_dir_modified()
458 	ovl_dentry_version_inc(dentry, impurity);  in ovl_dir_modified()
461 u64 ovl_dentry_version_get(struct dentry *dentry)  in ovl_dentry_version_get()  argument
463 	struct inode *inode = d_inode(dentry);  in ovl_dentry_version_get()
469 bool ovl_is_whiteout(struct dentry *dentry)  in ovl_is_whiteout()  argument
471 	struct inode *inode = dentry->d_inode;  in ovl_is_whiteout()
482 static bool ovl_already_copied_up_locked(struct dentry *dentry, int flags)  in ovl_already_copied_up_locked()  argument
484 	bool disconnected = dentry->d_flags & DCACHE_DISCONNECTED;  in ovl_already_copied_up_locked()
486 	if (ovl_dentry_upper(dentry) &&  in ovl_already_copied_up_locked()
487 	    (ovl_dentry_has_upper_alias(dentry) || disconnected) &&  in ovl_already_copied_up_locked()
488 	    !ovl_dentry_needs_data_copy_up_locked(dentry, flags))  in ovl_already_copied_up_locked()
494 bool ovl_already_copied_up(struct dentry *dentry, int flags)  in ovl_already_copied_up()  argument
496 	bool disconnected = dentry->d_flags & DCACHE_DISCONNECTED;  in ovl_already_copied_up()
511 	if (ovl_dentry_upper(dentry) &&  in ovl_already_copied_up()
512 	    (ovl_dentry_has_upper_alias(dentry) || disconnected) &&  in ovl_already_copied_up()
513 	    !ovl_dentry_needs_data_copy_up(dentry, flags))  in ovl_already_copied_up()
519 int ovl_copy_up_start(struct dentry *dentry, int flags)  in ovl_copy_up_start()  argument
521 	struct inode *inode = d_inode(dentry);  in ovl_copy_up_start()
525 	if (!err && ovl_already_copied_up_locked(dentry, flags)) {  in ovl_copy_up_start()
533 void ovl_copy_up_end(struct dentry *dentry)  in ovl_copy_up_end()  argument
535 	ovl_inode_unlock(d_inode(dentry));  in ovl_copy_up_end()
538 bool ovl_check_origin_xattr(struct dentry *dentry)  in ovl_check_origin_xattr()  argument
542 	res = vfs_getxattr(dentry, OVL_XATTR_ORIGIN, NULL, 0);  in ovl_check_origin_xattr()
551 bool ovl_check_dir_xattr(struct dentry *dentry, const char *name)  in ovl_check_dir_xattr()  argument
556 	if (!d_is_dir(dentry))  in ovl_check_dir_xattr()
559 	res = vfs_getxattr(dentry, name, &val, 1);  in ovl_check_dir_xattr()
566 int ovl_check_setxattr(struct dentry *dentry, struct dentry *upperdentry,  in ovl_check_setxattr()  argument
571 	struct ovl_fs *ofs = dentry->d_sb->s_fs_info;  in ovl_check_setxattr()
587 int ovl_set_impure(struct dentry *dentry, struct dentry *upperdentry)  in ovl_set_impure()  argument
591 	if (ovl_test_flag(OVL_IMPURE, d_inode(dentry)))  in ovl_set_impure()
598 	err = ovl_check_setxattr(dentry, upperdentry, OVL_XATTR_IMPURE,  in ovl_set_impure()
601 		ovl_set_flag(OVL_IMPURE, d_inode(dentry));  in ovl_set_impure()
625 bool ovl_inuse_trylock(struct dentry *dentry)  in ovl_inuse_trylock()  argument
627 	struct inode *inode = d_inode(dentry);  in ovl_inuse_trylock()
640 void ovl_inuse_unlock(struct dentry *dentry)  in ovl_inuse_unlock()  argument
642 	if (dentry) {  in ovl_inuse_unlock()
643 		struct inode *inode = d_inode(dentry);  in ovl_inuse_unlock()
652 bool ovl_is_inuse(struct dentry *dentry)  in ovl_is_inuse()  argument
654 	struct inode *inode = d_inode(dentry);  in ovl_is_inuse()
667 bool ovl_need_index(struct dentry *dentry)  in ovl_need_index()  argument
669 	struct dentry *lower = ovl_dentry_lower(dentry);  in ovl_need_index()
671 	if (!lower || !ovl_indexdir(dentry->d_sb))  in ovl_need_index()
675 	if (ovl_index_all(dentry->d_sb))  in ovl_need_index()
686 static void ovl_cleanup_index(struct dentry *dentry)  in ovl_cleanup_index()  argument
688 	struct dentry *indexdir = ovl_indexdir(dentry->d_sb);  in ovl_cleanup_index()
690 	struct dentry *lowerdentry = ovl_dentry_lower(dentry);  in ovl_cleanup_index()
691 	struct dentry *upperdentry = ovl_dentry_upper(dentry);  in ovl_cleanup_index()
692 	struct dentry *index = NULL;  in ovl_cleanup_index()
714 		set_nlink(d_inode(dentry), inode->i_nlink - 1);  in ovl_cleanup_index()
715 		ovl_set_nlink_upper(dentry);  in ovl_cleanup_index()
724 	} else if (ovl_index_all(dentry->d_sb)) {  in ovl_cleanup_index()
742 	pr_err("overlayfs: cleanup index of '%pd2' failed (%i)\n", dentry, err);  in ovl_cleanup_index()
750 int ovl_nlink_start(struct dentry *dentry)  in ovl_nlink_start()  argument
752 	struct inode *inode = d_inode(dentry);  in ovl_nlink_start()
773 	if (ovl_need_index(dentry) && !ovl_dentry_has_upper_alias(dentry)) {  in ovl_nlink_start()
774 		err = ovl_copy_up(dentry);  in ovl_nlink_start()
783 	if (d_is_dir(dentry) || !ovl_test_flag(OVL_INDEX, inode))  in ovl_nlink_start()
786 	old_cred = ovl_override_creds(dentry->d_sb);  in ovl_nlink_start()
793 	err = ovl_set_nlink_upper(dentry);  in ovl_nlink_start()
803 void ovl_nlink_end(struct dentry *dentry)  in ovl_nlink_end()  argument
805 	struct inode *inode = d_inode(dentry);  in ovl_nlink_end()
810 		old_cred = ovl_override_creds(dentry->d_sb);  in ovl_nlink_end()
811 		ovl_cleanup_index(dentry);  in ovl_nlink_end()
818 int ovl_lock_rename_workdir(struct dentry *workdir, struct dentry *upperdir)  in ovl_lock_rename_workdir()
838 int ovl_check_metacopy_xattr(struct dentry *dentry)  in ovl_check_metacopy_xattr()  argument
843 	if (!S_ISREG(d_inode(dentry)->i_mode))  in ovl_check_metacopy_xattr()
846 	res = vfs_getxattr(dentry, OVL_XATTR_METACOPY, NULL, 0);  in ovl_check_metacopy_xattr()
859 bool ovl_is_metacopy_dentry(struct dentry *dentry)  in ovl_is_metacopy_dentry()  argument
861 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_is_metacopy_dentry()
863 	if (!d_is_reg(dentry))  in ovl_is_metacopy_dentry()
866 	if (ovl_dentry_upper(dentry)) {  in ovl_is_metacopy_dentry()
867 		if (!ovl_has_upperdata(d_inode(dentry)))  in ovl_is_metacopy_dentry()
875 ssize_t ovl_getxattr(struct dentry *dentry, char *name, char **value,  in ovl_getxattr()  argument
881 	res = vfs_getxattr(dentry, name, NULL, 0);  in ovl_getxattr()
893 		res = vfs_getxattr(dentry, name, buf, res);  in ovl_getxattr()
908 char *ovl_get_redirect_xattr(struct dentry *dentry, int padding)  in ovl_get_redirect_xattr()  argument
913 	res = ovl_getxattr(dentry, OVL_XATTR_REDIRECT, &buf, padding + 1);  in ovl_get_redirect_xattr()