mkfs.f2fs: check zoned block devices configuration

Make sure the drive has enough randomly writeable zones from
the beginning of the partition to hold the meta data sections.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/mkfs/f2fs_format.c b/mkfs/f2fs_format.c
index df7365a..3385a91 100644 (file)
--- a/mkfs/f2fs_format.c
+++ b/mkfs/f2fs_format.c
@@ -184,6 +184,12 @@ static int f2fs_prepare_super_block(void)
        MSG(0, "Info: zone aligned segment0 blkaddr: %u\n",
                                        get_sb(segment0_blkaddr));
 
+       if (c.zoned_mode && get_sb(segment0_blkaddr) % c.zone_blocks) {
+               MSG(1, "\tError: Unaligned segment0 block address %u\n",
+                               get_sb(segment0_blkaddr));
+               return -1;
+       }
+
        set_sb(segment_count_ckpt, F2FS_NUMBER_OF_CHECKPOINT_PACK);
 
        set_sb(sit_blkaddr, get_sb(segment0_blkaddr) +
@@ -273,6 +279,21 @@ static int f2fs_prepare_super_block(void)
        set_sb(main_blkaddr, get_sb(segment0_blkaddr) + total_meta_zones *
                                c.segs_per_zone * c.blks_per_seg);
 
+       if (c.zoned_mode) {
+               /*
+                * Make sure there is enough randomly writeable
+                * space at the beginning of the disk.
+                */
+               unsigned long main_blkzone = get_sb(main_blkaddr) / c.zone_blocks;
+
+               if (c.nr_rnd_zones < main_blkzone) {
+                       MSG(1, "\tError: Device does not have enough random "
+                                       "write zones for F2FS volume (%lu needed)",
+                                       main_blkzone);
+                       return -1;
+               }
+       }
+
        total_zones = get_sb(segment_count) / (c.segs_per_zone) -
                                                        total_meta_zones;