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NFSD: Write verifier might go backwards
When vfs_iter_write() starts to fail because a file system is full, a bunch of writes can fail at once with ENOSPC. These writes repeatedly invoke nfsd_reset_boot_verifier() in quick succession. Ensure that the time it grabs doesn't go backwards due to an ntp adjustment going on at the same time. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
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@ -363,7 +363,7 @@ void nfsd_copy_boot_verifier(__be32 verf[2], struct nfsd_net *nn)
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static void nfsd_reset_boot_verifier_locked(struct nfsd_net *nn)
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{
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ktime_get_real_ts64(&nn->nfssvc_boot);
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ktime_get_raw_ts64(&nn->nfssvc_boot);
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}
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void nfsd_reset_boot_verifier(struct nfsd_net *nn)
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