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a6b4af5e07
Richard Kojedzinszky reported an intermittent problem where the Linux NFSv4.2 client would sometimes not see changes done to a directory by another client, although the change attribute for the directory had changed. A test patch that added the change_attr_type attribute to the server and always returned NFS4_CHANGE_TYPE_VERSION_COUNTER_NOPNFS seems to have resolved the issue. Somewhat oddly, the Linux knfsd server does not support this attribute but does not seem to exhibit the stale caching problem. This patch uses the VFCF_FILEREVINC flag on a file system (UFS, ZFS) to return NFS4_CHANGE_TYPE_VERSION_COUNTER_NOPNFS. It also returns NFS4_CHANGE_TYPE_TIME_METADATA if VFCF_FILEREVCT is set, which may be useful for exported fuse file systems. PR: 284186 (cherry picked from commit 709c18911ad70978d47198556c0fb1c0e703fb68) |
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