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  1. Lustre
  2. LU-15609

Client should not assume RDONLY implies SOM

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Details

    • Bug
    • Resolution: Fixed
    • Critical
    • Lustre 2.16.0
    • None
    • None
    • 3
    • 9223372036854775807

    Description

      In lov_io_slice_mirror_init, the client code assumes that a RDONLY flag in the layout implies SOM and skips glimpse if so.  This is something like a layering violation - SOM is communicated from the MDS when it is valid, and the client already skips glimpse in that case.

      Prior to "LU-14526 flr: mirror split downgrade SOM"/https://review.whamcloud.com/43168/, this was incorrect but not a problem, because LCM_FL_RDONLY always implied valid SOM.    That patch made that assumption invalid.

      Fix is for client not to assume LCM_FL_RDONLY means SOM.

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          is related to

          Improvement - An improvement or enhancement to an existing feature or task. LU-11695 disabling the xattr cache on client for LSOM

          • Major - Major loss of function.
          • Resolved

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              paf0186 Patrick Farrell
              paf0186 Patrick Farrell
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                Created:
                Updated:
                Resolved: