From: Naohiro Aota Naohiro.Aota@wdc.com
commit 02ca9e6fb5f66a031df4fac508b8e477ca69e918 upstream.
When both of the superblock zones are full, we need to check which superblock is newer. The calculation of last superblock position is wrong as it does not consider zone_capacity and uses the length.
Fixes: 9658b72ef300 ("btrfs: zoned: locate superblock position using zone capacity") CC: stable@vger.kernel.org # 6.1+ Reviewed-by: Johannes Thumshirn johannes.thumshirn@wdc.com Signed-off-by: Naohiro Aota naohiro.aota@wdc.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/btrfs/zoned.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)
--- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -122,10 +122,9 @@ static int sb_write_pointer(struct block int i;
for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++) { - u64 bytenr; - - bytenr = ((zones[i].start + zones[i].len) - << SECTOR_SHIFT) - BTRFS_SUPER_INFO_SIZE; + u64 zone_end = (zones[i].start + zones[i].capacity) << SECTOR_SHIFT; + u64 bytenr = ALIGN_DOWN(zone_end, BTRFS_SUPER_INFO_SIZE) - + BTRFS_SUPER_INFO_SIZE;
page[i] = read_cache_page_gfp(mapping, bytenr >> PAGE_SHIFT, GFP_NOFS);