1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
63  * The order of the attributes doesn't matter, this is simply the one hard-coded
124  * layout and just hard-codes attribute offsets.
178 	return (strcmp(cur->name, ".") == 0);  in fsnode_isroot()
184 	return (cur->type == S_IFREG || cur->type == S_IFDIR ||  in fsnode_valid()
185 	    cur->type == S_IFLNK);  in fsnode_valid()
189  * Visit each node in a directory hierarchy, in pre-order depth-first order.
194 	assert(root->type == S_IFDIR);  in fsnode_foreach()
196 	for (fsnode *cur = root; cur != NULL; cur = cur->next) {  in fsnode_foreach()
199 			    inode_type(cur->type), cur->path, cur->name);  in fsnode_foreach()
204 		if (cur->type == S_IFDIR && cur->child != NULL)  in fsnode_foreach()
205 			fsnode_foreach(cur->child, cb, arg);  in fsnode_foreach()
215 	switch (cur->type) {  in fs_populate_dirent()
229 	dir = SLIST_FIRST(&arg->dirs);  in fs_populate_dirent()
230 	zap_add_uint64(dir->zap, cur->name, ZFS_DIRENT_MAKE(type, dnid));  in fs_populate_dirent()
237 	assert(ind < fs->sacnt);  in fs_populate_attr()
238 	assert(fs->saoffs[ind] != 0xffff);  in fs_populate_attr()
240 	memcpy(attrbuf + fs->saoffs[ind], val, fs->satab[ind].size);  in fs_populate_attr()
241 	*szp += fs->satab[ind].size;  in fs_populate_attr()
248 	assert(ind < fs->sacnt);  in fs_populate_varszattr()
249 	assert(fs->saoffs[ind] != 0xffff);  in fs_populate_varszattr()
250 	assert(fs->satab[ind].size == 0);  in fs_populate_varszattr()
252 	memcpy(attrbuf + fs->saoffs[ind] + varoff, val, valsz);  in fs_populate_varszattr()
268 	if (cur->contents != NULL) {  in fs_populate_path()
272 		n = strlcpy(path, cur->contents, sz);  in fs_populate_path()
274 	} else if (cur->root == NULL) {  in fs_populate_path()
277 		*dirfdp = SLIST_FIRST(&arg->dirs)->dirfd;  in fs_populate_path()
278 		n = strlcpy(path, cur->name, sz);  in fs_populate_path()
285 		    cur->root, cur->path, cur->name);  in fs_populate_path()
323 	if (cur->symlink != NULL) {  in fs_readlink()
326 		n = strlcpy(buf, cur->symlink, bufsz);  in fs_readlink()
333 		n = readlinkat(fd, path, buf, bufsz - 1);  in fs_readlink()
334 		if (n == -1)  in fs_readlink()
335 			err(1, "readlinkat(%s)", cur->name);  in fs_readlink()
346 	assert(ind < fs->sacnt);  in fs_populate_time()
347 	assert(fs->saoffs[ind] != 0xffff);  in fs_populate_time()
348 	assert(fs->satab[ind].size == sizeof(timebuf));  in fs_populate_time()
350 	timebuf[0] = ts->tv_sec;  in fs_populate_time()
351 	timebuf[1] = ts->tv_nsec;  in fs_populate_time()
361 	zfs_ace_hdr_t aces[3];  in fs_populate_sattrs()  local
369 	assert(dnode->dn_bonustype == DMU_OT_SA);  in fs_populate_sattrs()
370 	assert(dnode->dn_nblkptr == 1);  in fs_populate_sattrs()
372 	fs = arg->fs;  in fs_populate_sattrs()
373 	sb = &cur->inode->st;  in fs_populate_sattrs()
375 	switch (cur->type) {  in fs_populate_sattrs()
378 		links = cur->inode->nlink;  in fs_populate_sattrs()
379 		objsize = sb->st_size;  in fs_populate_sattrs()
380 		parent = SLIST_FIRST(&arg->dirs)->objid;  in fs_populate_sattrs()
387 		if ((cur->inode->flags & FI_ROOT) == 0 ) {  in fs_populate_sattrs()
395 			    fsnode_isroot(cur) ? cur->next : cur->child;  in fs_populate_sattrs()
396 			    c != NULL; c = c->next) {  in fs_populate_sattrs()
397 				switch (c->type) {  in fs_populate_sattrs()
418 		parent = SLIST_EMPTY(&arg->dirs) ?  in fs_populate_sattrs()
419 		    arg->rootdirid : SLIST_FIRST(&arg->dirs)->objid;  in fs_populate_sattrs()
427 		parent = SLIST_FIRST(&arg->dirs)->objid;  in fs_populate_sattrs()
433 	daclcount = nitems(aces);  in fs_populate_sattrs()
437 	gid = sb->st_gid;  in fs_populate_sattrs()
438 	mode = sb->st_mode;  in fs_populate_sattrs()
439 	uid = sb->st_uid;  in fs_populate_sattrs()
441 	memset(aces, 0, sizeof(aces));  in fs_populate_sattrs()
442 	aces[0].z_flags = ACE_OWNER;  in fs_populate_sattrs()
443 	aces[0].z_type = ACE_ACCESS_ALLOWED_ACE_TYPE;  in fs_populate_sattrs()
444 	aces[0].z_access_mask = ACE_WRITE_ATTRIBUTES | ACE_WRITE_OWNER |  in fs_populate_sattrs()
448 		aces[0].z_access_mask |= ACE_READ_DATA;  in fs_populate_sattrs()
450 		aces[0].z_access_mask |= ACE_WRITE_DATA | ACE_APPEND_DATA;  in fs_populate_sattrs()
452 		aces[0].z_access_mask |= ACE_EXECUTE;  in fs_populate_sattrs()
454 	aces[1].z_flags = ACE_GROUP | ACE_IDENTIFIER_GROUP;  in fs_populate_sattrs()
455 	aces[1].z_type = ACE_ACCESS_ALLOWED_ACE_TYPE;  in fs_populate_sattrs()
456 	aces[1].z_access_mask = ACE_READ_ACL | ACE_READ_ATTRIBUTES |  in fs_populate_sattrs()
459 		aces[1].z_access_mask |= ACE_READ_DATA;  in fs_populate_sattrs()
461 		aces[1].z_access_mask |= ACE_WRITE_DATA | ACE_APPEND_DATA;  in fs_populate_sattrs()
463 		aces[1].z_access_mask |= ACE_EXECUTE;  in fs_populate_sattrs()
465 	aces[2].z_flags = ACE_EVERYONE;  in fs_populate_sattrs()
466 	aces[2].z_type = ACE_ACCESS_ALLOWED_ACE_TYPE;  in fs_populate_sattrs()
467 	aces[2].z_access_mask = ACE_READ_ACL | ACE_READ_ATTRIBUTES |  in fs_populate_sattrs()
470 		aces[2].z_access_mask |= ACE_READ_DATA;  in fs_populate_sattrs()
472 		aces[2].z_access_mask |= ACE_WRITE_DATA | ACE_APPEND_DATA;  in fs_populate_sattrs()
474 		aces[2].z_access_mask |= ACE_EXECUTE;  in fs_populate_sattrs()
478 		/* At most one variable-length attribute. */  in fs_populate_sattrs()
482 		/* At most five variable-length attributes. */  in fs_populate_sattrs()
490 	sahdr->sa_magic = SA_MAGIC;  in fs_populate_sattrs()
491 	SA_HDR_LAYOUT_INFO_ENCODE(sahdr->sa_layout_info, layout, hdrsz);  in fs_populate_sattrs()
507 	 * We deliberately set atime = mtime here to ensure that images are  in fs_populate_sattrs()
510 	fs_populate_time(fs, attrbuf, &sb->st_mtim, ZPL_ATIME, &bonussz);  in fs_populate_sattrs()
511 	fs_populate_time(fs, attrbuf, &sb->st_ctim, ZPL_CTIME, &bonussz);  in fs_populate_sattrs()
512 	fs_populate_time(fs, attrbuf, &sb->st_mtim, ZPL_MTIME, &bonussz);  in fs_populate_sattrs()
515 	fs_populate_time(fs, attrbuf, &sb->st_ctim, ZPL_CRTIME, &bonussz);  in fs_populate_sattrs()
517 	fs_populate_time(fs, attrbuf, &sb->st_birthtim, ZPL_CRTIME, &bonussz);  in fs_populate_sattrs()
520 	fs_populate_varszattr(fs, attrbuf, aces, sizeof(aces), 0,  in fs_populate_sattrs()
522 	sahdr->sa_lengths[0] = sizeof(aces);  in fs_populate_sattrs()
524 	if (cur->type == S_IFLNK) {  in fs_populate_sattrs()
529 		    sahdr->sa_lengths[0], ZPL_SYMLINK, &bonussz);  in fs_populate_sattrs()
530 		sahdr->sa_lengths[1] = (uint16_t)objsize;  in fs_populate_sattrs()
533 	dnode->dn_bonuslen = bonussz;  in fs_populate_sattrs()
549 	assert(cur->type == S_IFREG);  in fs_populate_file()
550 	assert((cur->inode->flags & FI_ROOT) == 0);  in fs_populate_file()
552 	zfs = arg->zfs;  in fs_populate_file()
554 	assert(cur->inode->ino != 0);  in fs_populate_file()
555 	if ((cur->inode->flags & FI_ALLOCATED) != 0) {  in fs_populate_file()
559 		 * XXX-MJ need to check whether it crosses datasets, add a test  in fs_populate_file()
562 		fs_populate_dirent(arg, cur, cur->inode->ino);  in fs_populate_file()
566 	dnode = objset_dnode_bonus_alloc(arg->fs->os,  in fs_populate_file()
568 	cur->inode->ino = dnid;  in fs_populate_file()
569 	cur->inode->flags |= FI_ALLOCATED;  in fs_populate_file()
573 	buf = zfs->filebuf;  in fs_populate_file()
574 	bufsz = sizeof(zfs->filebuf);  in fs_populate_file()
575 	size = cur->inode->st.st_size;  in fs_populate_file()
576 	c = dnode_cursor_init(zfs, arg->fs->os, dnode, size, 0);  in fs_populate_file()
584 		nbytes = MIN(size - foff, (off_t)bufsz);  in fs_populate_file()
588 				err(1, "reading from '%s'", cur->name);  in fs_populate_file()
591 				    cur->name);  in fs_populate_file()
596 			memset(buf + nbytes, 0, bufsz - nbytes);  in fs_populate_file()
599 		loc = objset_space_alloc(zfs, arg->fs->os, &reqbytes);  in fs_populate_file()
618 	assert(cur->type == S_IFDIR);  in fs_populate_dir()
619 	assert((cur->inode->flags & FI_ALLOCATED) == 0);  in fs_populate_dir()
621 	os = arg->fs->os;  in fs_populate_dir()
629 	if (!SLIST_EMPTY(&arg->dirs)) {  in fs_populate_dir()
638 		arg->rootdirid = dnid;  in fs_populate_dir()
639 		dirfd = arg->rootdirfd;  in fs_populate_dir()
640 		arg->rootdirfd = -1;  in fs_populate_dir()
644 	 * Set ZPL attributes.  in fs_populate_dir()
652 	if ((cur->inode->flags & FI_ROOT) == 0) {  in fs_populate_dir()
656 		dir->dirfd = dirfd;  in fs_populate_dir()
657 		dir->objid = dnid;  in fs_populate_dir()
658 		dir->zap = zap_alloc(os, dnode);  in fs_populate_dir()
659 		SLIST_INSERT_HEAD(&arg->dirs, dir, next);  in fs_populate_dir()
661 		zap_write(arg->zfs, zap_alloc(os, dnode));  in fs_populate_dir()
662 		fs_build_one(arg->zfs, cur->inode->param, cur->child, dirfd);  in fs_populate_dir()
672 	assert(cur->type == S_IFLNK);  in fs_populate_symlink()
673 	assert((cur->inode->flags & (FI_ALLOCATED | FI_ROOT)) == 0);  in fs_populate_symlink()
675 	dnode = objset_dnode_bonus_alloc(arg->fs->os,  in fs_populate_symlink()
686 	for (cur = cur->next; cur != NULL; cur = cur->next) {  in fsnode_next()
701 	switch (cur->type) {  in fs_foreach_populate()
717 	ret = (cur->inode->flags & FI_ROOT) != 0 ? 0 : 1;  in fs_foreach_populate()
720 	    (cur->child == NULL || (cur->inode->flags & FI_ROOT) != 0)) {  in fs_foreach_populate()
728 			dir = SLIST_FIRST(&arg->dirs);  in fs_foreach_populate()
729 			SLIST_REMOVE_HEAD(&arg->dirs, next);  in fs_foreach_populate()
730 			zap_write(arg->zfs, dir->zap);  in fs_foreach_populate()
731 			if (dir->dirfd != -1)  in fs_foreach_populate()
732 				eclose(dir->dirfd);  in fs_foreach_populate()
734 			cur = cur->parent;  in fs_foreach_populate()
736 		    (cur->inode->flags & FI_ROOT) == 0);  in fs_foreach_populate()
760  * allows us to set file attributes quickly.
771 	os = fs->os;  in fs_set_zpl_attrs()
774 	 * The on-disk tables are stored in two ZAP objects, the registry object  in fs_set_zpl_attrs()
793 		SA_ATTR_ENCODE(attr, (uint64_t)i, sa->size, sa->bs);  in fs_set_zpl_attrs()
794 		zap_add_uint64(sarzap, sa->name, attr);  in fs_set_zpl_attrs()
800 	 * layouts for use by the ZPL, one for non-symlinks and one for  in fs_set_zpl_attrs()
805 	assert(zpl_attr_layout[nitems(zpl_attr_layout) - 1] == ZPL_SYMLINK);  in fs_set_zpl_attrs()
807 	    zpl_attr_layout, nitems(zpl_attr_layout) - 1);  in fs_set_zpl_attrs()
827 	fs->sacnt = nitems(zpl_attrs);  in fs_set_zpl_attrs()
828 	fs->saoffs = ecalloc(fs->sacnt, sizeof(*fs->saoffs));  in fs_set_zpl_attrs()
829 	for (size_t i = 0; i < fs->sacnt; i++)  in fs_set_zpl_attrs()
830 		fs->saoffs[i] = 0xffff;  in fs_set_zpl_attrs()
835 		assert(zpl_attr_layout[i] < fs->sacnt);  in fs_set_zpl_attrs()
837 		fs->saoffs[zpl_attr_layout[i]] = offset;  in fs_set_zpl_attrs()
841 	fs->satab = zpl_attrs;  in fs_set_zpl_attrs()
863 	 * If we were asked to specify a bootfs, set it here.  in fs_layout_one()
865 	if (zfs->bootfs != NULL && strcmp(zfs->bootfs,  in fs_layout_one()
867 		zap_add_uint64(zfs->poolprops, "bootfs",  in fs_layout_one()
878 	if (strcmp(mountpoint, zfs->rootpath) != 0) {  in fs_layout_one()
879 		mountpoint += strlen(zfs->rootpath);  in fs_layout_one()
894 			for (; cur != NULL && strcmp(cur->name, name) != 0;  in fs_layout_one()
895 			    cur = cur->next)  in fs_layout_one()
903 			if (cur->type != S_IFDIR) {  in fs_layout_one()
909 				cur = cur->child;  in fs_layout_one()
914 		assert(cur->type == S_IFDIR);  in fs_layout_one()
921 		assert((cur->inode->flags & FI_ROOT) == 0);  in fs_layout_one()
923 			cur->inode->flags |= FI_ROOT;  in fs_layout_one()
924 		assert(cur->inode->param == NULL);  in fs_layout_one()
925 		cur->inode->param = dsldir;  in fs_layout_one()
937 	if (cur->type == S_IFDIR && fsnode_isroot(cur))  in fs_foreach_mark()
940 	if (cur->inode->ino == 0) {  in fs_foreach_mark()
941 		cur->inode->ino = ++(*countp);  in fs_foreach_mark()
942 		cur->inode->nlink = 1;  in fs_foreach_mark()
944 		cur->inode->nlink++;  in fs_foreach_mark()
947 	return ((cur->inode->flags & FI_ROOT) != 0 ? 0 : 1);  in fs_foreach_mark()
952  * - create an object set for the dataset,
953  * - add required metadata (SA tables, property definitions, etc.) to that
954  *   object set,
955  * - optionally populate the object set with file objects, using "root" as the
981 		assert(dirfd == -1);  in fs_build_one()
984 		root->inode = ecalloc(1, sizeof(*root->inode));  in fs_build_one()
985 		root->name = estrdup(".");  in fs_build_one()
986 		root->type = S_IFDIR;  in fs_build_one()
988 		stp = &root->inode->st;  in fs_build_one()
989 		stp->st_uid = 0;  in fs_build_one()
990 		stp->st_gid = 0;  in fs_build_one()
991 		stp->st_mode = S_IFDIR | 0755;  in fs_build_one()
993 	assert(root->type == S_IFDIR);  in fs_build_one()
997 	 * Initialize the object set for this dataset.  in fs_build_one()
1057 	 * All finished with this object set, we may as well write it now.  in fs_build_one()
1059 	 * information stored in the object set, so it can't be freed just yet.  in fs_build_one()
1064 		free(root->inode);  in fs_build_one()
1065 		free(root->name);  in fs_build_one()
1072  * Create an object set for each DSL directory which has a dataset and doesn't
1073  * already have an object set.
1079 		fs_build_one(zfs, dsldir, NULL, -1);  in fs_build_unmounted()
1093 	dsl_dir_foreach(zfs, zfs->rootdsldir, fs_layout_one, root);  in fs_build()
1098 	if (zfs->bootfs != NULL && !zap_entry_exists(zfs->poolprops, "bootfs"))  in fs_build()
1100 		    zfs->bootfs);  in fs_build()
1112 	fs_build_one(zfs, root->inode->param, root, dirfd);  in fs_build()
1119 	dsl_dir_foreach(zfs, zfs->rootdsldir, fs_build_unmounted, NULL);  in fs_build()