There is nothing to prevent another thread from dereferencing ds->ds_clp
during or after the call to nfs4_ds_disconnect(), and Oopsing due to the
resulting NULL pointer.
Instead, we should just rely on filelayout_mark_devid_invalid() to keep
us out of trouble by avoiding that deviceid.
Signed-off-by: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
---
fs/nfs/nfs4filelayout.c | 1 -
fs/nfs/nfs4filelayout.h | 1 -
fs/nfs/nfs4filelayoutdev.c | 22 ----------------------
3 files changed, 24 deletions(-)
diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index 52d8472..816c2d0 100644
--- a/fs/nfs/nfs4filelayout.c
+++ b/fs/nfs/nfs4filelayout.c
@@ -207,7 +207,6 @@ static int filelayout_async_handle_error(struct rpc_task *task,
clear_bit(NFS_INO_LAYOUTCOMMIT, &NFS_I(inode)->flags);
_pnfs_return_layout(inode);
rpc_wake_up(&tbl->slot_tbl_waitq);
- nfs4_ds_disconnect(clp);
/* fall through */
default:
reset:
diff --git a/fs/nfs/nfs4filelayout.h b/fs/nfs/nfs4filelayout.h
index dca47d78..8c07241 100644
--- a/fs/nfs/nfs4filelayout.h
+++ b/fs/nfs/nfs4filelayout.h
@@ -149,6 +149,5 @@ extern void nfs4_fl_put_deviceid(struct nfs4_file_layout_dsaddr *dsaddr);
extern void nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr);
struct nfs4_file_layout_dsaddr *
filelayout_get_device_info(struct inode *inode, struct nfs4_deviceid *dev_id, gfp_t gfp_flags);
-void nfs4_ds_disconnect(struct nfs_client *clp);
#endif /* FS_NFS_NFS4FILELAYOUT_H */
diff --git a/fs/nfs/nfs4filelayoutdev.c b/fs/nfs/nfs4filelayoutdev.c
index 3336d5e..a8eaa9b 100644
--- a/fs/nfs/nfs4filelayoutdev.c
+++ b/fs/nfs/nfs4filelayoutdev.c
@@ -149,28 +149,6 @@ _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
*/
--
1.7.11.7
--
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