From a73eb8b993dc644f6b10fc18b9036f89e00588e2 Mon Sep 17 00:00:00 2001 From: Chandan Rajendra Date: Wed, 14 Oct 2015 23:10:38 +0530 Subject: Btrfs-progs: Prevent creation of filesystem with 'mixed bgs' and having differing sectorsize and nodesize. mkfs.btrfs allows creation of Btrfs filesystem instances with mixed block group feature enabled and having a sectorsize different from nodesize. For e.g: [root@localhost btrfs-progs]# mkfs.btrfs -f -M -s 4096 -n 16384 /dev/loop0 Forcing mixed metadata/data groups btrfs-progs v3.19-rc2-404-gbbbd18e-dirty See http://btrfs.wiki.kernel.org for more information. Performing full device TRIM (4.00GiB) ... Label: (null) UUID: c82b5720-6d88-4fa1-ac05-d0d4cb797fd5 Node size: 16384 Sector size: 4096 Filesystem size: 4.00GiB Block group profiles: Data+Metadata: single 8.00MiB System: single 4.00MiB SSD detected: no Incompat features: mixed-bg, extref, skinny-metadata Number of devices: 1 Devices: ID SIZE PATH 1 4.00GiB /dev/loop6 This commit fixes the issue by setting BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS feature bit before checking the validity of nodesize that was specified on the command line. Signed-off-by: Chandan Rajendra Signed-off-by: David Sterba --- mkfs.c | 25 +++++++++++++------------ 1 file changed, 13 insertions(+), 12 deletions(-) (limited to 'mkfs.c') diff --git a/mkfs.c b/mkfs.c index 5940abd9..bbbcc46e 100644 --- a/mkfs.c +++ b/mkfs.c @@ -1540,6 +1540,19 @@ int main(int ac, char **av) if (!nodesize_forced) nodesize = best_nodesize; } + + /* + * FS features that can be set by other means than -O + * just set the bit here + */ + if (mixed) + features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS; + + if ((data_profile | metadata_profile) & + (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) { + features |= BTRFS_FEATURE_INCOMPAT_RAID56; + } + if (btrfs_check_nodesize(nodesize, sectorsize, features)) exit(1); @@ -1647,18 +1660,6 @@ int main(int ac, char **av) "WARNING: metatdata has lower redundancy than data!\n\n"); } - /* - * FS features that can be set by other means than -O - * just set the bit here - */ - if (mixed) - features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS; - - if ((data_profile | metadata_profile) & - (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) { - features |= BTRFS_FEATURE_INCOMPAT_RAID56; - } - mkfs_cfg.label = label; mkfs_cfg.fs_uuid = fs_uuid; memcpy(mkfs_cfg.blocks, blocks, sizeof(blocks)); -- cgit v1.2.3