Re: [PATCH 2/5] btrfs-progs: image: Fix block group item flags when restoring multi-device image to single device
On 2018/11/27 下午3:15, Nikolay Borisov wrote: > > > On 27.11.18 г. 4:33 ч., Qu Wenruo wrote: >> Since btrfs-image is just restoring tree blocks without really check if >> that tree block contents makes sense, for multi-device image, block >> group items will keep that incorrect block group flags. >> >> For example, for a metadata RAID1 data RAID0 btrfs recovered to a single >> disk, its chunk tree will look like: >> >> item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 22020096) >> length 8388608 owner 2 stripe_len 65536 type SYSTEM >> item 2 key (FIRST_CHUNK_TREE CHUNK_ITEM 30408704) >> length 1073741824 owner 2 stripe_len 65536 type METADATA >> item 3 key (FIRST_CHUNK_TREE CHUNK_ITEM 1104150528) >> length 1073741824 owner 2 stripe_len 65536 type DATA >> >> All chunks have correct type (SINGLE). >> >> While its block group items will look like: >> >> item 1 key (22020096 BLOCK_GROUP_ITEM 8388608) >> block group used 16384 chunk_objectid 256 flags SYSTEM|RAID1 >> item 3 key (30408704 BLOCK_GROUP_ITEM 1073741824) >> block group used 114688 chunk_objectid 256 flags METADATA|RAID1 >> item 11 key (1104150528 BLOCK_GROUP_ITEM 1073741824) >> block group used 1572864 chunk_objectid 256 flags DATA|RAID0 >> >> All block group items still have the wrong profiles. >> >> And btrfs check (lowmem mode for better output) will report error for such >> image: >> >> ERROR: chunk[22020096 30408704) related block group item flags mismatch, >> wanted: 2, have: 18 >> ERROR: chunk[30408704 1104150528) related block group item flags mismatch, >> wanted: 4, have: 20 >> ERROR: chunk[1104150528 2177892352) related block group item flags >> mismatch, wanted: 1, have: 9 >> >> This patch will do an extra repair for block group items to fix the >> profile of them. >> >> Signed-off-by: Qu Wenruo >> --- >> image/main.c | 47 +++ >> 1 file changed, 47 insertions(+) >> >> diff --git a/image/main.c b/image/main.c >> index 36b5c95ea146..9060f6b1b665 100644 >> --- a/image/main.c >> +++ b/image/main.c >> @@ -2164,6 +2164,52 @@ again: >> return 0; >> } >> >> +static void fixup_block_groups(struct btrfs_trans_handle *trans, >> + struct btrfs_fs_info *fs_info) > > You are not even using the trans handle in this function, why pass it? Bad habit again. Will definitely do something with that. Thanks, Qu > >> +{ >> +struct btrfs_block_group_cache *bg; >> +struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree; >> +struct cache_extent *ce; >> +struct map_lookup *map; >> +u64 extra_flags; >> + >> +for (ce = search_cache_extent(&map_tree->cache_tree, 0); ce; >> + ce = next_cache_extent(ce)) { >> +map = container_of(ce, struct map_lookup, ce); >> + >> +bg = btrfs_lookup_block_group(fs_info, ce->start); >> +if (!bg) { >> +warning( >> +"can't find block group %llu, result fs may not be mountable", >> +ce->start); >> +continue; >> +} >> +extra_flags = map->type & BTRFS_BLOCK_GROUP_PROFILE_MASK; >> + >> +if (bg->flags == map->type) >> +continue; >> + >> +/* Update the block group item and mark the bg dirty */ >> +bg->flags = map->type; >> +btrfs_set_block_group_flags(&bg->item, bg->flags); >> +set_extent_bits(&fs_info->block_group_cache, ce->start, >> +ce->start + ce->size - 1, BLOCK_GROUP_DIRTY); >> + >> +/* >> + * Chunk and bg flags can be different, changing bg flags >> + * without update avail_data/meta_alloc_bits will lead to >> + * ENOSPC. >> + * So here we set avail_*_alloc_bits to match chunk types. >> + */ >> +if (map->type & BTRFS_BLOCK_GROUP_DATA) >> +fs_info->avail_data_alloc_bits = extra_flags; >> +if (map->type & BTRFS_BLOCK_GROUP_METADATA) >> +fs_info->avail_metadata_alloc_bits = extra_flags; >> +if (map->type & BTRFS_BLOCK_GROUP_SYSTEM) >> +fs_info->avail_system_alloc_bits = extra_flags; >> +} >> +} >> + >> static int fixup_chunks_and_devices(struct btrfs_fs_info *fs_info, >> struct mdrestore_struct *mdres, off_t dev_size) >> { >> @@ -2180,6 +2226,7 @@ static int fixup_chunks_and_devices(struct >> btrfs_fs_info *fs_info, >> return PTR_ERR(trans); >> } >> >> +fixup_block_groups(trans, fs_info); >> ret = fixup_device_size(trans, fs_info, mdres, dev_size); >> if (ret < 0) >> goto error; >>
Re: [PATCH 2/5] btrfs-progs: image: Fix block group item flags when restoring multi-device image to single device
On 27.11.18 г. 4:33 ч., Qu Wenruo wrote: > Since btrfs-image is just restoring tree blocks without really check if > that tree block contents makes sense, for multi-device image, block > group items will keep that incorrect block group flags. > > For example, for a metadata RAID1 data RAID0 btrfs recovered to a single > disk, its chunk tree will look like: > > item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 22020096) > length 8388608 owner 2 stripe_len 65536 type SYSTEM > item 2 key (FIRST_CHUNK_TREE CHUNK_ITEM 30408704) > length 1073741824 owner 2 stripe_len 65536 type METADATA > item 3 key (FIRST_CHUNK_TREE CHUNK_ITEM 1104150528) > length 1073741824 owner 2 stripe_len 65536 type DATA > > All chunks have correct type (SINGLE). > > While its block group items will look like: > > item 1 key (22020096 BLOCK_GROUP_ITEM 8388608) > block group used 16384 chunk_objectid 256 flags SYSTEM|RAID1 > item 3 key (30408704 BLOCK_GROUP_ITEM 1073741824) > block group used 114688 chunk_objectid 256 flags METADATA|RAID1 > item 11 key (1104150528 BLOCK_GROUP_ITEM 1073741824) > block group used 1572864 chunk_objectid 256 flags DATA|RAID0 > > All block group items still have the wrong profiles. > > And btrfs check (lowmem mode for better output) will report error for such > image: > > ERROR: chunk[22020096 30408704) related block group item flags mismatch, > wanted: 2, have: 18 > ERROR: chunk[30408704 1104150528) related block group item flags mismatch, > wanted: 4, have: 20 > ERROR: chunk[1104150528 2177892352) related block group item flags > mismatch, wanted: 1, have: 9 > > This patch will do an extra repair for block group items to fix the > profile of them. > > Signed-off-by: Qu Wenruo > --- > image/main.c | 47 +++ > 1 file changed, 47 insertions(+) > > diff --git a/image/main.c b/image/main.c > index 36b5c95ea146..9060f6b1b665 100644 > --- a/image/main.c > +++ b/image/main.c > @@ -2164,6 +2164,52 @@ again: > return 0; > } > > +static void fixup_block_groups(struct btrfs_trans_handle *trans, > + struct btrfs_fs_info *fs_info) You are not even using the trans handle in this function, why pass it? > +{ > + struct btrfs_block_group_cache *bg; > + struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree; > + struct cache_extent *ce; > + struct map_lookup *map; > + u64 extra_flags; > + > + for (ce = search_cache_extent(&map_tree->cache_tree, 0); ce; > + ce = next_cache_extent(ce)) { > + map = container_of(ce, struct map_lookup, ce); > + > + bg = btrfs_lookup_block_group(fs_info, ce->start); > + if (!bg) { > + warning( > + "can't find block group %llu, result fs may not be mountable", > + ce->start); > + continue; > + } > + extra_flags = map->type & BTRFS_BLOCK_GROUP_PROFILE_MASK; > + > + if (bg->flags == map->type) > + continue; > + > + /* Update the block group item and mark the bg dirty */ > + bg->flags = map->type; > + btrfs_set_block_group_flags(&bg->item, bg->flags); > + set_extent_bits(&fs_info->block_group_cache, ce->start, > + ce->start + ce->size - 1, BLOCK_GROUP_DIRTY); > + > + /* > + * Chunk and bg flags can be different, changing bg flags > + * without update avail_data/meta_alloc_bits will lead to > + * ENOSPC. > + * So here we set avail_*_alloc_bits to match chunk types. > + */ > + if (map->type & BTRFS_BLOCK_GROUP_DATA) > + fs_info->avail_data_alloc_bits = extra_flags; > + if (map->type & BTRFS_BLOCK_GROUP_METADATA) > + fs_info->avail_metadata_alloc_bits = extra_flags; > + if (map->type & BTRFS_BLOCK_GROUP_SYSTEM) > + fs_info->avail_system_alloc_bits = extra_flags; > + } > +} > + > static int fixup_chunks_and_devices(struct btrfs_fs_info *fs_info, >struct mdrestore_struct *mdres, off_t dev_size) > { > @@ -2180,6 +2226,7 @@ static int fixup_chunks_and_devices(struct > btrfs_fs_info *fs_info, > return PTR_ERR(trans); > } > > + fixup_block_groups(trans, fs_info); > ret = fixup_device_size(trans, fs_info, mdres, dev_size); > if (ret < 0) > goto error; >
[PATCH 2/5] btrfs-progs: image: Fix block group item flags when restoring multi-device image to single device
Since btrfs-image is just restoring tree blocks without really check if that tree block contents makes sense, for multi-device image, block group items will keep that incorrect block group flags. For example, for a metadata RAID1 data RAID0 btrfs recovered to a single disk, its chunk tree will look like: item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 22020096) length 8388608 owner 2 stripe_len 65536 type SYSTEM item 2 key (FIRST_CHUNK_TREE CHUNK_ITEM 30408704) length 1073741824 owner 2 stripe_len 65536 type METADATA item 3 key (FIRST_CHUNK_TREE CHUNK_ITEM 1104150528) length 1073741824 owner 2 stripe_len 65536 type DATA All chunks have correct type (SINGLE). While its block group items will look like: item 1 key (22020096 BLOCK_GROUP_ITEM 8388608) block group used 16384 chunk_objectid 256 flags SYSTEM|RAID1 item 3 key (30408704 BLOCK_GROUP_ITEM 1073741824) block group used 114688 chunk_objectid 256 flags METADATA|RAID1 item 11 key (1104150528 BLOCK_GROUP_ITEM 1073741824) block group used 1572864 chunk_objectid 256 flags DATA|RAID0 All block group items still have the wrong profiles. And btrfs check (lowmem mode for better output) will report error for such image: ERROR: chunk[22020096 30408704) related block group item flags mismatch, wanted: 2, have: 18 ERROR: chunk[30408704 1104150528) related block group item flags mismatch, wanted: 4, have: 20 ERROR: chunk[1104150528 2177892352) related block group item flags mismatch, wanted: 1, have: 9 This patch will do an extra repair for block group items to fix the profile of them. Signed-off-by: Qu Wenruo --- image/main.c | 47 +++ 1 file changed, 47 insertions(+) diff --git a/image/main.c b/image/main.c index 36b5c95ea146..9060f6b1b665 100644 --- a/image/main.c +++ b/image/main.c @@ -2164,6 +2164,52 @@ again: return 0; } +static void fixup_block_groups(struct btrfs_trans_handle *trans, + struct btrfs_fs_info *fs_info) +{ + struct btrfs_block_group_cache *bg; + struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree; + struct cache_extent *ce; + struct map_lookup *map; + u64 extra_flags; + + for (ce = search_cache_extent(&map_tree->cache_tree, 0); ce; +ce = next_cache_extent(ce)) { + map = container_of(ce, struct map_lookup, ce); + + bg = btrfs_lookup_block_group(fs_info, ce->start); + if (!bg) { + warning( + "can't find block group %llu, result fs may not be mountable", + ce->start); + continue; + } + extra_flags = map->type & BTRFS_BLOCK_GROUP_PROFILE_MASK; + + if (bg->flags == map->type) + continue; + + /* Update the block group item and mark the bg dirty */ + bg->flags = map->type; + btrfs_set_block_group_flags(&bg->item, bg->flags); + set_extent_bits(&fs_info->block_group_cache, ce->start, + ce->start + ce->size - 1, BLOCK_GROUP_DIRTY); + + /* +* Chunk and bg flags can be different, changing bg flags +* without update avail_data/meta_alloc_bits will lead to +* ENOSPC. +* So here we set avail_*_alloc_bits to match chunk types. +*/ + if (map->type & BTRFS_BLOCK_GROUP_DATA) + fs_info->avail_data_alloc_bits = extra_flags; + if (map->type & BTRFS_BLOCK_GROUP_METADATA) + fs_info->avail_metadata_alloc_bits = extra_flags; + if (map->type & BTRFS_BLOCK_GROUP_SYSTEM) + fs_info->avail_system_alloc_bits = extra_flags; + } +} + static int fixup_chunks_and_devices(struct btrfs_fs_info *fs_info, struct mdrestore_struct *mdres, off_t dev_size) { @@ -2180,6 +2226,7 @@ static int fixup_chunks_and_devices(struct btrfs_fs_info *fs_info, return PTR_ERR(trans); } + fixup_block_groups(trans, fs_info); ret = fixup_device_size(trans, fs_info, mdres, dev_size); if (ret < 0) goto error; -- 2.19.2