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NFSD: Write verifier might go backwards

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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>
This commit is contained in:
Chuck Lever 2021-12-30 10:26:18 -05:00
parent a2f4c3fa4d
commit cdc556600c
1 changed files with 1 additions and 1 deletions
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2
fs/nfsd/nfssvc.c
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@ -363,7 +363,7 @@ void nfsd_copy_boot_verifier(__be32 verf[2], struct nfsd_net *nn)
static void nfsd_reset_boot_verifier_locked(struct nfsd_net *nn)
{
ktime_get_real_ts64(&nn->nfssvc_boot);
ktime_get_raw_ts64(&nn->nfssvc_boot);
}
void nfsd_reset_boot_verifier(struct nfsd_net *nn)