fs/bcachefs/super-io.c

170 		u64 max_bytes = 512 << sb->sb->layout.sb_max_size_bits;
261 static int validate_sb_layout(struct bch_sb_layout *layout, struct printbuf *out)
268 	if (!uuid_equal(&layout->magic, &BCACHE_MAGIC) &&
269 	    !uuid_equal(&layout->magic, &BCHFS_MAGIC)) {
270 		prt_printf(out, "Not a bcachefs superblock layout");
274 	if (layout->layout_type != 0) {
275 		prt_printf(out, "Invalid superblock layout type %u",
276 		       layout->layout_type);
280 	if (!layout->nr_superblocks) {
281 		prt_printf(out, "Invalid superblock layout: no superblocks");
285 	if (layout->nr_superblocks > ARRAY_SIZE(layout->sb_offset)) {
286 		prt_printf(out, "Invalid superblock layout: too many superblocks");
290 	max_sectors = 1 << layout->sb_max_size_bits;
292 	prev_offset = le64_to_cpu(layout->sb_offset[0]);
294 	for (i = 1; i < layout->nr_superblocks; i++) {
295 		offset = le64_to_cpu(layout->sb_offset[i]);
298 			prt_printf(out, "Invalid superblock layout: superblocks overlap\n"
434 	/* validate layout */
435 	ret = validate_sb_layout(&sb->layout, out);
652 	if (bytes > 512ULL << min(BCH_SB_LAYOUT_SIZE_BITS_MAX, sb->sb->layout.sb_max_size_bits)) {
653 		prt_printf(err, "Invalid superblock: too big (got %zu bytes, layout max %lu)",
654 		       bytes, 512UL << sb->sb->layout.sb_max_size_bits);
687 	struct bch_sb_layout layout;
774 	 * use sb buffer to read layout, since sb buffer is page aligned but
775 	 * layout won't be:
785 	memcpy(&layout, sb->sb, sizeof(layout));
786 	ret = validate_sb_layout(&layout, &err);
790 	for (i = layout.sb_offset;
791 	     i < layout.sb_offset + layout.nr_superblocks; i++) {
880 	bio->bi_iter.bi_sector	= le64_to_cpu(sb->layout.sb_offset[0]);
897 	sb->offset = sb->layout.sb_offset[idx];
950 	c->disk_sb.sb->layout.magic = BCHFS_MAGIC;
1048 			    sb < ca->disk_sb.sb->layout.nr_superblocks) {
1361 	prt_units_u64(out, 512ULL << sb->layout.sb_max_size_bits);
1417 		prt_printf(out, "layout:");
1420 		bch2_sb_layout_to_text(out, &sb->layout);