From: Chris Mason Date: Thu, 29 Mar 2012 21:02:47 +0000 (-0400) Subject: Btrfs: update the checks for mixed block groups with big metadata blocks X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=bc3f116fec194f1d7329b160c266fe16b9266a1e;p=openwrt%2Fstaging%2Fblogic.git Btrfs: update the checks for mixed block groups with big metadata blocks Dave Sterba had put in patches to look for mixed data/metadata groups with metadata bigger than 4KB. But these ended up in the wrong place and it wasn't testing the feature flag correctly. This updates the tests to make sure our sizes are matching Signed-off-by: Chris Mason --- diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index fd43f6b2f438..20196f411206 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -2120,6 +2120,23 @@ int open_ctree(struct super_block *sb, features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; } + nodesize = btrfs_super_nodesize(disk_super); + leafsize = btrfs_super_leafsize(disk_super); + sectorsize = btrfs_super_sectorsize(disk_super); + stripesize = btrfs_super_stripesize(disk_super); + + /* + * mixed block groups end up with duplicate but slightly offset + * extent buffers for the same range. It leads to corruptions + */ + if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && + (sectorsize != leafsize)) { + printk(KERN_WARNING "btrfs: unequal leaf/node/sector sizes " + "are not allowed for mixed block groups on %s\n", + sb->s_id); + goto fail_alloc; + } + btrfs_set_super_incompat_flags(disk_super, features); features = btrfs_super_compat_ro_flags(disk_super) & @@ -2223,10 +2240,6 @@ int open_ctree(struct super_block *sb, fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, 4 * 1024 * 1024 / PAGE_CACHE_SIZE); - nodesize = btrfs_super_nodesize(disk_super); - leafsize = btrfs_super_leafsize(disk_super); - sectorsize = btrfs_super_sectorsize(disk_super); - stripesize = btrfs_super_stripesize(disk_super); tree_root->nodesize = nodesize; tree_root->leafsize = leafsize; tree_root->sectorsize = sectorsize; @@ -2247,14 +2260,6 @@ int open_ctree(struct super_block *sb, goto fail_sb_buffer; } - if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && - (leafsize != nodesize || sectorsize != nodesize)) { - printk(KERN_WARNING "btrfs: unequal leaf/node/sector sizes " - "are not allowed for mixed block groups on %s\n", - sb->s_id); - goto fail_sb_buffer; - } - mutex_lock(&fs_info->chunk_mutex); ret = btrfs_read_sys_array(tree_root); mutex_unlock(&fs_info->chunk_mutex);