33 	struct dentry *upper, *lower;  in ovl_d_real()  local
55 		lower = ovl_dentry_lower(dentry);  in ovl_d_real()
70 	lower = ovl_dentry_lowerdata(dentry);  in ovl_d_real()
71 	if (!lower)  in ovl_d_real()
75 	/* Handle recursion into stacked lower fs */  in ovl_d_real()
76 	return d_real(lower, type);  in ovl_d_real()
433 	/* Check if lower fs has 32bit inode numbers */  in ovl_lower_dir()
476  * attempted to be used as a lower layer in a new overlay mount.
500 		pr_err("upper fs is r/o, try multi-lower layers mount\n");  in ovl_get_upper()
846 	/* Verify lower root is upper root origin */  in ovl_get_indexdir()
910 	 * We allow using single lower with null uuid for index and nfs_export  in ovl_lower_uuid_ok()
911 	 * for example to support those features with single lower squashfs.  in ovl_lower_uuid_ok()
912 	 * To avoid regressions in setups of overlay with re-formatted lower  in ovl_lower_uuid_ok()
913 	 * squashfs, do not allow decoding origin with lower null uuid unless  in ovl_lower_uuid_ok()
915 	 * lower inode of non-dir upper.  in ovl_lower_uuid_ok()
922 		 * We use uuid to associate an overlay lower file handle with a  in ovl_lower_uuid_ok()
923 		 * lower layer, so we can accept lower fs with null uuid as long  in ovl_lower_uuid_ok()
924 		 * as all lower layers with null uuid are on the same fs.  in ovl_lower_uuid_ok()
925 		 * if we detect multiple lower fs with the same uuid, we  in ovl_lower_uuid_ok()
926 		 * disable lower file handle decoding on all of them.  in ovl_lower_uuid_ok()
964 …pr_warn("%s uuid detected in lower fs '%pd2', falling back to xino=%s,index=off,nfs_export=off.\n",  in ovl_get_fsid()
985  * The fsid after the last lower fsid is used for the data layers.
1006 	 * idx/fsid 0 are reserved for upper fs even with lower only overlay  in ovl_get_layers()
1012 	 * All lower layers that share the same fs as upper layer, use the same  in ovl_get_layers()
1013 	 * pseudo_dev as upper layer.  Allocate fs[0].pseudo_dev even for lower  in ovl_get_layers()
1015 	 * is_lower will be set if upper fs is shared with a lower layer.  in ovl_get_layers()
1030 		struct ovl_fs_context_layer *l = &ctx->lower[i];  in ovl_get_layers()
1043 		 * Check if lower root conflicts with this overlay layers before  in ovl_get_layers()
1070 		 * Make lower layers R/O.  That way fchmod/fchown on lower file  in ovl_get_layers()
1071 		 * will fail instead of modifying lower fs.  in ovl_get_layers()
1106 		 * lower only overlay) +1 extra bit is reserved for the non  in ovl_get_layers()
1108 		 * xino lower bits overflow.  in ovl_get_layers()
1147 		l = &ctx->lower[i];  in ovl_get_lowerstack()
1174 		l = &ctx->lower[i];  in ovl_get_lowerstack()
1419 		pr_warn("The uuid=off requires a single fs for lower and upper, falling back to uuid=null.\n");  in ovl_fill_super()