20 	struct dentry *dentry;  member
73 static int ovl_acceptable(void *ctx, struct dentry *dentry)  in ovl_acceptable()  argument
79 	if (!d_is_dir(dentry))  in ovl_acceptable()
83 	if (d_unhashed(dentry))  in ovl_acceptable()
87 	return is_subdir(dentry, ((struct vfsmount *)ctx)->mnt_root);  in ovl_acceptable()
117 static struct ovl_fh *ovl_get_fh(struct ovl_fs *ofs, struct dentry *upperdentry,  in ovl_get_fh()
174 struct dentry *ovl_decode_real_fh(struct ovl_fs *ofs, struct ovl_fh *fh,  in ovl_decode_real_fh()
177 	struct dentry *real;  in ovl_decode_real_fh()
211 static struct dentry *ovl_lookup_positive_unlocked(struct ovl_lookup_data *d,  in ovl_lookup_positive_unlocked()
213 						   struct dentry *base, int len,  in ovl_lookup_positive_unlocked()
216 	struct dentry *ret = lookup_one_unlocked(mnt_idmap(d->layer->mnt),  in ovl_lookup_positive_unlocked()
233 static int ovl_lookup_single(struct dentry *base, struct ovl_lookup_data *d,  in ovl_lookup_single()
236 			     struct dentry **ret, bool drop_negative)  in ovl_lookup_single()
239 	struct dentry *this = NULL;  in ovl_lookup_single()
282 	path.dentry = this;  in ovl_lookup_single()
356 static int ovl_lookup_layer(struct dentry *base, struct ovl_lookup_data *d,  in ovl_lookup_layer()
357 			    struct dentry **ret, bool drop_negative)  in ovl_lookup_layer()
361 	struct dentry *dentry = NULL;  in ovl_lookup_layer()  local
381 		dput(dentry);  in ovl_lookup_layer()
384 		dentry = base;  in ovl_lookup_layer()
393 	*ret = dentry;  in ovl_lookup_layer()
397 static int ovl_lookup_data_layer(struct dentry *dentry, const char *redirect,  in ovl_lookup_data_layer()  argument
407 		 dentry, redirect, layer->idx, err);  in ovl_lookup_data_layer()
413 	if (ovl_dentry_weird(datapath->dentry))  in ovl_lookup_data_layer()
418 	if (!d_is_reg(datapath->dentry))  in ovl_lookup_data_layer()
430 static int ovl_lookup_data_layers(struct dentry *dentry, const char *redirect,  in ovl_lookup_data_layers()  argument
433 	struct ovl_fs *ofs = OVL_FS(dentry->d_sb);  in ovl_lookup_data_layers()
441 		err = ovl_lookup_data_layer(dentry, redirect, layer, &datapath);  in ovl_lookup_data_layers()
444 			lowerdata->dentry = datapath.dentry;  in ovl_lookup_data_layers()
454 			struct dentry *upperdentry, struct ovl_path **stackp)  in ovl_check_origin_fh()
456 	struct dentry *origin = NULL;  in ovl_check_origin_fh()
490 		.dentry = origin,  in ovl_check_origin_fh()
504 static int ovl_check_origin(struct ovl_fs *ofs, struct dentry *upperdentry,  in ovl_check_origin()
529 static int ovl_verify_fh(struct ovl_fs *ofs, struct dentry *dentry,  in ovl_verify_fh()  argument
532 	struct ovl_fh *ofh = ovl_get_fh(ofs, dentry, ox);  in ovl_verify_fh()
548 int ovl_verify_set_fh(struct ovl_fs *ofs, struct dentry *dentry,  in ovl_verify_set_fh()  argument
554 	err = ovl_verify_fh(ofs, dentry, ox, fh);  in ovl_verify_set_fh()
556 		err = ovl_setxattr(ofs, dentry, ox, fh->buf, fh->fb.len);  in ovl_verify_set_fh()
569 int ovl_verify_origin_xattr(struct ovl_fs *ofs, struct dentry *dentry,  in ovl_verify_origin_xattr()  argument
570 			    enum ovl_xattr ox, struct dentry *real,  in ovl_verify_origin_xattr()
584 	err = ovl_verify_set_fh(ofs, dentry, ox, fh, is_upper, set);  in ovl_verify_origin_xattr()
602 struct dentry *ovl_index_upper(struct ovl_fs *ofs, struct dentry *index,  in ovl_index_upper()
606 	struct dentry *upper;  in ovl_index_upper()
636 int ovl_verify_index(struct ovl_fs *ofs, struct dentry *index)  in ovl_verify_index()
642 	struct dentry *upper = NULL;  in ovl_verify_index()
715 		if (ovl_get_nlink(ofs, origin.dentry, index, 0) == 0)  in ovl_verify_index()
720 	dput(origin.dentry);  in ovl_verify_index()
767 int ovl_get_index_name(struct ovl_fs *ofs, struct dentry *origin,  in ovl_get_index_name()
784 struct dentry *ovl_get_index_fh(struct ovl_fs *ofs, struct ovl_fh *fh)  in ovl_get_index_fh()
786 	struct dentry *index;  in ovl_get_index_fh()
813 struct dentry *ovl_lookup_index(struct ovl_fs *ofs, struct dentry *upper,  in ovl_lookup_index()
814 				struct dentry *origin, bool verify)  in ovl_lookup_index()
816 	struct dentry *index;  in ovl_lookup_index()
903 int ovl_path_next(int idx, struct dentry *dentry, struct path *path,  in ovl_path_next()  argument
906 	struct ovl_entry *oe = OVL_E(dentry);  in ovl_path_next()
911 		ovl_path_upper(dentry, path);  in ovl_path_next()
912 		if (path->dentry) {  in ovl_path_next()
913 			*layer = &OVL_FS(dentry->d_sb)->layers[0];  in ovl_path_next()
919 	path->dentry = lowerstack[idx - 1].dentry;  in ovl_path_next()
927 static int ovl_fix_origin(struct ovl_fs *ofs, struct dentry *dentry,  in ovl_fix_origin()  argument
928 			  struct dentry *lower, struct dentry *upper)  in ovl_fix_origin()
940 	err = ovl_want_write(dentry);  in ovl_fix_origin()
946 		err = ovl_set_impure(dentry->d_parent, upper->d_parent);  in ovl_fix_origin()
948 	ovl_drop_write(dentry);  in ovl_fix_origin()
954 static int ovl_maybe_validate_verity(struct dentry *dentry)  in ovl_maybe_validate_verity()  argument
956 	struct ovl_fs *ofs = OVL_FS(dentry->d_sb);  in ovl_maybe_validate_verity()
957 	struct inode *inode = d_inode(dentry);  in ovl_maybe_validate_verity()
962 	    !ovl_is_metacopy_dentry(dentry) ||  in ovl_maybe_validate_verity()
969 					    dentry);  in ovl_maybe_validate_verity()
975 	ovl_path_lowerdata(dentry, &datapath);  in ovl_maybe_validate_verity()
976 	if (!datapath.dentry)  in ovl_maybe_validate_verity()
979 	ovl_path_real(dentry, &metapath);  in ovl_maybe_validate_verity()
980 	if (!metapath.dentry)  in ovl_maybe_validate_verity()
988 		with_ovl_creds(dentry->d_sb)  in ovl_maybe_validate_verity()
1000 static int ovl_maybe_lookup_lowerdata(struct dentry *dentry)  in ovl_maybe_lookup_lowerdata()  argument
1002 	struct inode *inode = d_inode(dentry);  in ovl_maybe_lookup_lowerdata()
1007 	if (!redirect || ovl_dentry_lowerdata(dentry))  in ovl_maybe_lookup_lowerdata()
1019 	if (ovl_dentry_lowerdata(dentry))  in ovl_maybe_lookup_lowerdata()
1022 	with_ovl_creds(dentry->d_sb)  in ovl_maybe_lookup_lowerdata()
1023 		err = ovl_lookup_data_layers(dentry, redirect, &datapath);  in ovl_maybe_lookup_lowerdata()
1027 	err = ovl_dentry_set_lowerdata(dentry, &datapath);  in ovl_maybe_lookup_lowerdata()
1033 	dput(datapath.dentry);  in ovl_maybe_lookup_lowerdata()
1039 			    dentry, err);  in ovl_maybe_lookup_lowerdata()
1043 int ovl_verify_lowerdata(struct dentry *dentry)  in ovl_verify_lowerdata()  argument
1047 	err = ovl_maybe_lookup_lowerdata(dentry);  in ovl_verify_lowerdata()
1051 	return ovl_maybe_validate_verity(dentry);  in ovl_verify_lowerdata()
1069 		pr_warn_ratelimited("refusing to follow metacopy origin for (%pd2)\n", d->dentry);  in ovl_check_follow_redirect()
1073 		pr_warn_ratelimited("refusing to follow redirect for (%pd2)\n", d->dentry);  in ovl_check_follow_redirect()
1080 	struct dentry *dentry;  member
1084 	struct dentry *upperdentry;
1085 	struct dentry *index;
1092 	struct dentry *dentry = ctx->dentry;  in ovl_lookup_layers()  local
1093 	struct ovl_fs *ofs = OVL_FS(dentry->d_sb);  in ovl_lookup_layers()
1094 	struct ovl_entry *poe = OVL_E(dentry->d_parent);  in ovl_lookup_layers()
1095 	struct ovl_entry *roe = OVL_E(dentry->d_sb->s_root);  in ovl_lookup_layers()
1097 	struct dentry *upperdir;  in ovl_lookup_layers()
1098 	struct dentry *this;  in ovl_lookup_layers()
1099 	struct dentry *origin = NULL;  in ovl_lookup_layers()
1106 	upperdir = ovl_dentry_upper(dentry->d_parent);  in ovl_lookup_layers()
1168 		err = ovl_lookup_layer(lower.dentry, d, &this, false);  in ovl_lookup_layers()
1180 			err = ovl_fix_origin(ofs, dentry, this, ctx->upperdentry);  in ovl_lookup_layers()
1197 		    ((d->is_dir && ovl_verify_lower(dentry->d_sb)) ||  in ovl_lookup_layers()
1222 			ctx->stack[ctx->ctr].dentry = this;  in ovl_lookup_layers()
1259 				    dentry);  in ovl_lookup_layers()
1269 		origin = ctx->origin_path->dentry;  in ovl_lookup_layers()
1293 		origin = ctx->stack[0].dentry;  in ovl_lookup_layers()
1295 	if (origin && ovl_indexdir(dentry->d_sb) &&  in ovl_lookup_layers()
1296 	    (!d->is_dir || ovl_index_all(dentry->d_sb))) {  in ovl_lookup_layers()
1315 		ovl_dentry_set_opaque(dentry);  in ovl_lookup_layers()
1317 		ovl_dentry_set_xwhiteouts(dentry);  in ovl_lookup_layers()
1320 		ovl_dentry_set_upper_alias(dentry);  in ovl_lookup_layers()
1324 			.dentry = ctx->upperdentry = dget(ctx->index),  in ovl_lookup_layers()
1360 		if (ctx->ctr > 1 && !d->is_dir && !ctx->stack[ctx->ctr - 1].dentry) {  in ovl_lookup_layers()
1365 		inode = ovl_get_inode(dentry->d_sb, &oip);  in ovl_lookup_layers()
1377 	ovl_dentry_init_reval(dentry, ctx->upperdentry, OVL_I_E(ctx->inode));  in ovl_lookup_layers()
1382 struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,  in ovl_lookup()  argument
1385 	struct ovl_fs *ofs = OVL_FS(dentry->d_sb);  in ovl_lookup()
1386 	struct ovl_entry *poe = OVL_E(dentry->d_parent);  in ovl_lookup()
1390 		.dentry = dentry,  in ovl_lookup()
1393 		.sb	= dentry->d_sb,  in ovl_lookup()
1394 		.dentry = dentry,  in ovl_lookup()
1395 		.name	= dentry->d_name,  in ovl_lookup()
1399 	if (dentry->d_name.len > ofs->namelen)  in ovl_lookup()
1402 	with_ovl_creds(dentry->d_sb)  in ovl_lookup()
1406 		dput(ctx.origin_path->dentry);  in ovl_lookup()
1420 	return d_splice_alias(ctx.inode, dentry);  in ovl_lookup()
1423 bool ovl_lower_positive(struct dentry *dentry)  in ovl_lower_positive()  argument
1425 	struct ovl_entry *poe = OVL_E(dentry->d_parent);  in ovl_lower_positive()
1426 	const struct qstr *name = &dentry->d_name;  in ovl_lower_positive()
1435 	if (!dentry->d_inode)  in ovl_lower_positive()
1436 		return ovl_dentry_is_opaque(dentry);  in ovl_lower_positive()
1439 	if (!ovl_dentry_upper(dentry))  in ovl_lower_positive()
1442 	with_ovl_creds(dentry->d_sb) {  in ovl_lower_positive()
1445 			struct dentry *this;  in ovl_lower_positive()
1455 							    parentpath->dentry);  in ovl_lower_positive()
1472 					.dentry = this,  in ovl_lower_positive()
1475 				positive = !ovl_path_is_whiteout(OVL_FS(dentry->d_sb), &path);  in ovl_lower_positive()