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authorTrond Myklebust <Trond.Myklebust@netapp.com>2013-09-26 14:08:36 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2013-09-29 15:56:35 -0400
commit52b26a3e1bb3e065c32b3febdac1e1f117d88e15 (patch)
treebcad0ee4bfb02acd387c4ef7f10ffdb1b69d52fc
parent5bc2afc2b53fc73f154e6344cd898585628e6d27 (diff)
NFSv4.1: nfs4_fl_prepare_ds - fix bugs when the connect attempt fails
- Fix an Oops when nfs4_ds_connect() returns an error. - Always check the device status after waiting for a connect to complete. Reported-by: Andy Adamson <andros@netapp.com> Reported-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: <stable@vger.kernel.org> # v3.10+
-rw-r--r--fs/nfs/nfs4filelayoutdev.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/fs/nfs/nfs4filelayoutdev.c b/fs/nfs/nfs4filelayoutdev.c
index 95604f64cab8..cd3aef571c34 100644
--- a/fs/nfs/nfs4filelayoutdev.c
+++ b/fs/nfs/nfs4filelayoutdev.c
@@ -801,34 +801,34 @@ nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx)
struct nfs4_file_layout_dsaddr *dsaddr = FILELAYOUT_LSEG(lseg)->dsaddr;
struct nfs4_pnfs_ds *ds = dsaddr->ds_list[ds_idx];
struct nfs4_deviceid_node *devid = FILELAYOUT_DEVID_NODE(lseg);
-
- if (filelayout_test_devid_unavailable(devid))
- return NULL;
+ struct nfs4_pnfs_ds *ret = ds;
if (ds == NULL) {
printk(KERN_ERR "NFS: %s: No data server for offset index %d\n",
__func__, ds_idx);
filelayout_mark_devid_invalid(devid);
- return NULL;
+ goto out;
}
if (ds->ds_clp)
- return ds;
+ goto out_test_devid;
if (test_and_set_bit(NFS4DS_CONNECTING, &ds->ds_state) == 0) {
struct nfs_server *s = NFS_SERVER(lseg->pls_layout->plh_inode);
int err;
err = nfs4_ds_connect(s, ds);
- if (err) {
+ if (err)
nfs4_mark_deviceid_unavailable(devid);
- ds = NULL;
- }
nfs4_clear_ds_conn_bit(ds);
} else {
/* Either ds is connected, or ds is NULL */
nfs4_wait_ds_connect(ds);
}
- return ds;
+out_test_devid:
+ if (filelayout_test_devid_unavailable(devid))
+ ret = NULL;
+out:
+ return ret;
}
module_param(dataserver_retrans, uint, 0644);