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https://github.com/kdave/btrfs-progs
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997f9977c2
When creating btrfs, mkfs.btrfs will firstly create a temporary system chunk as basis, and then created needed trees or new devices. However the layout temporary system chunk is hard-coded and uses reserved [0, 1M) range of devid 1. Change the temporary chunk layout from old: 0 1M 4M 5M |<----------- temp chunk -------------->| And it's 1:1 mapped, which means it's a SINGLE chunk, and stripe offset is also 0. to new layout: 0 1M 4M 5M |<----------- temp chunk -------------->| And still keeps the 1:1 mapping. However this also affects btrfs_min_dev_size() which still assume temporary chunks starts at device offset 0. The problem can only be exposed by "-m single" or "-M" where we reuse the temporary chunk. With other meta profiles, system and meta chunks are allocated by later btrfs_alloc_chunk() call, and old SINGLE chunks are removed, so it will be no such problem for other meta profiles. Reported-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: Qu Wenruo <wqu@suse.com> Tested-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> [ folded fix for the minimal device size calculation ] Signed-off-by: David Sterba <dsterba@suse.com> |
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| .. | ||
| common.c | ||
| common.h | ||
| main.c | ||
| rootdir.c | ||
| rootdir.h | ||