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| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2021-06-01 18:35:56 +0300 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2021-06-03 17:14:42 +0300 |
| commit | c3aba897c6e67fa464ec02b1f17911577d619713 (patch) | |
| tree | 76cc409decc35501161e928293f57ce0356b5280 /fs/nfs/nfs4proc.c | |
| parent | dfe1fe75e00e4c724ede7b9e593f6f680e446c5f (diff) | |
| download | linux-c3aba897c6e67fa464ec02b1f17911577d619713.tar.xz | |
NFSv4: Fix second deadlock in nfs4_evict_inode()
If the inode is being evicted but has to return a layout first, then
that too can cause a deadlock in the corner case where the server
reboots.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs/nfs/nfs4proc.c')
| -rw-r--r-- | fs/nfs/nfs4proc.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index cf85f0ed1e06..e653654c10bc 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -9658,15 +9658,20 @@ int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) &task_setup_data.rpc_client, &msg); dprintk("--> %s\n", __func__); + lrp->inode = nfs_igrab_and_active(lrp->args.inode); if (!sync) { - lrp->inode = nfs_igrab_and_active(lrp->args.inode); if (!lrp->inode) { nfs4_layoutreturn_release(lrp); return -EAGAIN; } task_setup_data.flags |= RPC_TASK_ASYNC; } - nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 0); + if (!lrp->inode) + nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, + 1); + else + nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, + 0); task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) return PTR_ERR(task); |