With the recent change in metadata handling, we can handle metadata in
the following cases:
- nodesize < PAGE_SIZE and sectorsize < PAGE_SIZE
Go subpage routine for both metadata and data.
- nodesize < PAGE_SIZE and sectorsize >= PAGE_SIZE
Invalid case for now. As we require nodesize >= sectorsize.
- nodesize >= PAGE_SIZE and sectorsize < PAGE_SIZE
Go subpage routine for data, but regular page routine for metadata.
- nodesize >= PAGE_SIZE and sectorsize >= PAGE_SIZE
Go regular page routine for both metadata and data.
Now we can handle any sectorsize < PAGE_SIZE, plus the existing
sectorsize == PAGE_SIZE support.
But here we introduce an artificial limit, any PAGE_SIZE > 4K case, we
will only support 4K and PAGE_SIZE as sector size.
The idea here is to reduce the test combinations, and push 4K as the
default standard in the future.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
}
/*
- * For 4K page size, we only support 4K sector size.
- * For 64K page size, we support 64K and 4K sector sizes.
+ * We only support at most two sectorsizes: 4K and PAGE_SIZE.
+ *
+ * We can support 16K sectorsize with 64K page size without problem,
+ * but such sectorsize/pagesize combination doesn't make much sense.
+ * 4K will be our future standard, PAGE_SIZE is supported from the very
+ * beginning.
*/
- if ((PAGE_SIZE == SZ_4K && sectorsize != PAGE_SIZE) ||
- (PAGE_SIZE == SZ_64K && (sectorsize != SZ_4K &&
- sectorsize != SZ_64K))) {
+ if (sectorsize > PAGE_SIZE || (sectorsize != SZ_4K && sectorsize != PAGE_SIZE)) {
btrfs_err(fs_info,
"sectorsize %llu not yet supported for page size %lu",
sectorsize, PAGE_SIZE);
{
ssize_t ret = 0;
- /* 4K sector size is also supported with 64K page size */
- if (PAGE_SIZE == SZ_64K)
+ /* An artificial limit to only support 4K and PAGE_SIZE */
+ if (PAGE_SIZE > SZ_4K)
ret += sysfs_emit_at(buf, ret, "%u ", SZ_4K);
-
- /* Only sectorsize == PAGE_SIZE is now supported */
ret += sysfs_emit_at(buf, ret, "%lu\n", PAGE_SIZE);
return ret;