OpenAFS Master Repository branch, openafs-stable-1_6_x, updated. openafs-stable-1_6_1pre2-160-gb623d13

Gerrit Code Review
Thu, 30 Aug 2012 05:03:28 -0700 (PDT)

The following commit has been merged in the openafs-stable-1_6_x branch:
commit b623d13f0f95084a0502af2cd2ee1849f8f80654
Author: Andrew Deason <>
Date:   Thu Mar 22 10:42:38 2012 -0500

    afs: Set DWriting when truncating a dcache entry
    When we truncate a file, we truncate the contents of the relevant
    dcache entry chunks, and prevent future FetchData operations from
    fetching data beyond the truncation offset. If we never write anything
    to that chunk, we never set DWriting, and so on disk it looks like
    that dcache entry has valid data for the specified DV. However, since
    the data is truncated, this is not true.
    If a process holds a file open, truncates it without writing to it,
    and then the client crashes (or we have trouble contacting the
    fileserver when we close the file), the dcache entry will appear valid
    on disk. So the next time we read the dcache entry, we will use the
    incorrect cache contents as if they were accurate for the specified
    To avoid this, set DWriting when we truncate a chunk. Normally we only
    clear DWriting when we actually send data to the fileserver, so to
    clear DWriting in this case, add an additional line to clear it in
    afs_StoreAllSegments, after the StoreMini has completed.
    Tested-by: BuildBot <>
    Reviewed-by: Derrick Brashear <>
    (cherry picked from commit b3b267d16eefb993f52f66bf44f3e659c1017e58)
    Change-Id: I5602db9687f3f005f68200a4208a3c7012933efa
    Tested-by: BuildBot <>
    Reviewed-by: Derrick Brashear <>

 src/afs/afs_segments.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

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