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authorAndy Adamson <andros@netapp.com>2012-04-27 17:53:52 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-05-19 17:55:32 -0400
commitb4a2967e52523dbf0281b52c042f9042c6082f99 (patch)
treee35824780a7d474501af611161e4181e95b18691 /fs/nfs/nfs4filelayoutdev.c
parentNFSv4.1 ref count nfs_client across filelayout data server io (diff)
downloadlinux-dev-b4a2967e52523dbf0281b52c042f9042c6082f99.tar.xz
linux-dev-b4a2967e52523dbf0281b52c042f9042c6082f99.zip
NFSv4.1 dereference a disconnected data server client record
When the last DS io is processed, the data server client record will be freed. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4filelayoutdev.c')
-rw-r--r--fs/nfs/nfs4filelayoutdev.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/nfs/nfs4filelayoutdev.c b/fs/nfs/nfs4filelayoutdev.c
index d4d2032c1992..bf49b78db1b3 100644
--- a/fs/nfs/nfs4filelayoutdev.c
+++ b/fs/nfs/nfs4filelayoutdev.c
@@ -149,6 +149,28 @@ _data_server_lookup_locked(const struct list_head *dsaddrs)
}
/*
+ * Lookup DS by nfs_client pointer. Zero data server client pointer
+ */
+void nfs4_ds_disconnect(struct nfs_client *clp)
+{
+ struct nfs4_pnfs_ds *ds;
+ struct nfs_client *found = NULL;
+
+ dprintk("%s clp %p\n", __func__, clp);
+ spin_lock(&nfs4_ds_cache_lock);
+ list_for_each_entry(ds, &nfs4_data_server_cache, ds_node)
+ if (ds->ds_clp && ds->ds_clp == clp) {
+ found = ds->ds_clp;
+ ds->ds_clp = NULL;
+ }
+ spin_unlock(&nfs4_ds_cache_lock);
+ if (found) {
+ set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
+ nfs_put_client(clp);
+ }
+}
+
+/*
* Create an rpc connection to the nfs4_pnfs_ds data server
* Currently only supports IPv4 and IPv6 addresses
*/