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NFSv4/pnfs: Fix an infinite layoutget loop 

Since we can now use a lock stateid or a delegation stateid, that
differs from the context stateid, we need to change the test in
nfs4_layoutget_handle_exception() to take this into account.

This fixes an infinite layoutget loop in the NFS client whereby
it keeps retrying the initial layoutget using the same broken
stateid.

Fixes: 70d2f7b1ea ("pNFS: Use the standard I/O stateid when...")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2017-10-04 13:49:12 -04:00
parent 0a47df11bf
commit e8fa33a6f6
1 changed files with 1 additions and 2 deletions
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3
fs/nfs/nfs4proc.c
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@ -8399,8 +8399,7 @@ nfs4_layoutget_handle_exception(struct rpc_task *task,
lo = NFS_I(inode)->layout;
/* If the open stateid was bad, then recover it. */
if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
nfs4_stateid_match_other(&lgp->args.stateid,
&lgp->args.ctx->state->stateid)) {
!nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
spin_unlock(&inode->i_lock);
exception->state = lgp->args.ctx->state;
exception->stateid = &lgp->args.stateid;