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V2 fields are set on a V1 journal superblock, or an internal V2 journal has s_nr_users is non-zero, clear the entire journal superblock beyond the V1 superblock. This fixes botched V1->V2 updates. problem.c, problem.h (PR_0_CLEAR_V2_JOURNAL): Add new problem code. f_bad_local_jnl: New test which tests for a V2 journal with bad fields caused by a botched V1->V2 upgrade. |
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