bcachefs: bch_member->seq

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Add new fields for split brain detection:

 - bch_member->seq, which tracks the sequence number of the last superblock
   write that happened to each member device

 - bch_sb->write_time, which tracks the time of the last superblock write,
   to allow detection of when two members have diverged but had the same
   number of superblock writes.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

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This commit is contained in:

Kent Overstreet 2023-06-27 21:02:27 -04:00

parent 62719cf33c

commit 6b00de06f5

3 changed files with 22 additions and 2 deletions

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8

fs/bcachefs/bcachefs_format.h

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5

fs/bcachefs/sb-members.c

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11

fs/bcachefs/super-io.c

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