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Merge tag 'nfs-for-4.18-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

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Pull NFS client bugfixes from Trond Myklebust:
 "Hightlights include:

   - fix an rcu deadlock in nfs_delegation_find_inode()

   - fix NFSv4 deadlocks due to not freeing the session slot in
     layoutget

   - don't send layoutreturn if the layout is already invalid

   - prevent duplicate XID allocation

   - flexfiles: Don't tie up all the rpciod threads in resends"

* tag 'nfs-for-4.18-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  pNFS/flexfiles: Process writeback resends from nfsiod context as well
  pNFS/flexfiles: Don't tie up all the rpciod threads in resends
  sunrpc: Prevent duplicate XID allocation
  pNFS: Don't send layoutreturn if the layout is already invalid
  pNFS: Always free the session slot on error in nfs4_layoutget_handle_exception
  NFS: Fix an rcu deadlock in nfs_delegation_find_inode()
This commit is contained in:
Linus Torvalds
2018-06-22 06:21:34 +09:00
parent acdf3f93b6 7b0df92ac1
commit 27db64f65f
6 changed files with 59 additions and 16 deletions
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10
net/sunrpc/xprt.c
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@@ -987,8 +987,6 @@ bool xprt_prepare_transmit(struct rpc_task *task)
task->tk_status = -EAGAIN;
goto out_unlock;
}
if (!bc_prealloc(req) && !req->rq_xmit_bytes_sent)
req->rq_xid = xprt_alloc_xid(xprt);
ret = true;
out_unlock:
spin_unlock_bh(&xprt->transport_lock);
@@ -1298,7 +1296,12 @@ void xprt_retry_reserve(struct rpc_task *task)
static inline __be32 xprt_alloc_xid(struct rpc_xprt *xprt)
{
return (__force __be32)xprt->xid++;
__be32 xid;
spin_lock(&xprt->reserve_lock);
xid = (__force __be32)xprt->xid++;
spin_unlock(&xprt->reserve_lock);
return xid;
}
static inline void xprt_init_xid(struct rpc_xprt *xprt)
@@ -1316,6 +1319,7 @@ void xprt_request_init(struct rpc_task *task)
req->rq_task = task;
req->rq_xprt = xprt;
req->rq_buffer = NULL;
req->rq_xid = xprt_alloc_xid(xprt);
req->rq_connect_cookie = xprt->connect_cookie - 1;
req->rq_bytes_sent = 0;
req->rq_snd_buf.len = 0;