diff options
| author | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2017-11-01 15:48:43 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-30 08:39:04 +0000 |
| commit | 8fb42f722743c226d1079e40d4ad96d8d8aef273 (patch) | |
| tree | 53b62cc3c66993141f7a3ecc2af1688e5e61865a /fs | |
| parent | 8ead2acf0e5ade83a39dc47e97aa7ef3bc1c1ec0 (diff) | |
NFS: Avoid RCU usage in tracepoints
commit 3944369db701f075092357b511fd9f5755771585 upstream.
There isn't an obvious way to acquire and release the RCU lock during a
tracepoint, so we can't use the rpc_peeraddr2str() function here.
Instead, rely on the client's cl_hostname, which should have similar
enough information without needing an rcu_dereference().
Reported-by: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfs/nfs4trace.h | 24 |
1 files changed, 6 insertions, 18 deletions
diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h index cfb8f7ce5cf6..20cd8500452a 100644 --- a/fs/nfs/nfs4trace.h +++ b/fs/nfs/nfs4trace.h @@ -201,17 +201,13 @@ DECLARE_EVENT_CLASS(nfs4_clientid_event, TP_ARGS(clp, error), TP_STRUCT__entry( - __string(dstaddr, - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR)) + __string(dstaddr, clp->cl_hostname) __field(int, error) ), TP_fast_assign( __entry->error = error; - __assign_str(dstaddr, - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR)); + __assign_str(dstaddr, clp->cl_hostname); ), TP_printk( @@ -1103,9 +1099,7 @@ DECLARE_EVENT_CLASS(nfs4_inode_callback_event, __field(dev_t, dev) __field(u32, fhandle) __field(u64, fileid) - __string(dstaddr, clp ? - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR) : "unknown") + __string(dstaddr, clp ? clp->cl_hostname : "unknown") ), TP_fast_assign( @@ -1118,9 +1112,7 @@ DECLARE_EVENT_CLASS(nfs4_inode_callback_event, __entry->fileid = 0; __entry->dev = 0; } - __assign_str(dstaddr, clp ? - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR) : "unknown") + __assign_str(dstaddr, clp ? clp->cl_hostname : "unknown") ), TP_printk( @@ -1162,9 +1154,7 @@ DECLARE_EVENT_CLASS(nfs4_inode_stateid_callback_event, __field(dev_t, dev) __field(u32, fhandle) __field(u64, fileid) - __string(dstaddr, clp ? - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR) : "unknown") + __string(dstaddr, clp ? clp->cl_hostname : "unknown") __field(int, stateid_seq) __field(u32, stateid_hash) ), @@ -1179,9 +1169,7 @@ DECLARE_EVENT_CLASS(nfs4_inode_stateid_callback_event, __entry->fileid = 0; __entry->dev = 0; } - __assign_str(dstaddr, clp ? - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR) : "unknown") + __assign_str(dstaddr, clp ? clp->cl_hostname : "unknown") __entry->stateid_seq = be32_to_cpu(stateid->seqid); __entry->stateid_hash = |