pnfs: make _set_lo_fail generic

file layout and block layout both use it to set mark layout io failure
bit. So make it generic.

Signed-off-by: Peng Tao <peng_tao@emc.com>
Signed-off-by: Jim Rees <rees@umich.edu>
Cc: stable@kernel.org [3.0]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

4 files changed, 19 insertions, 30 deletions

diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index dee6cae80fe..2167ba2afdb 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -176,17 +176,6 @@ retry:
         return bio;
 }
 
-static void bl_set_lo_fail(struct pnfs_layout_segment *lseg)
-{
-        if (lseg->pls_range.iomode == IOMODE_RW) {
-                dprintk("%s Setting layout IOMODE_RW fail bit\n", __func__);
-                set_bit(lo_fail_bit(IOMODE_RW), &lseg->pls_layout->plh_flags);
-        } else {
-                dprintk("%s Setting layout IOMODE_READ fail bit\n", __func__);
-                set_bit(lo_fail_bit(IOMODE_READ), &lseg->pls_layout->plh_flags);
-        }
-}
-
 /* This is basically copied from mpage_end_io_read */
 static void bl_end_io_read(struct bio *bio, int err)
 {
@@ -206,7 +195,7 @@ static void bl_end_io_read(struct bio *bio, int err)
         if (!uptodate) {
                 if (!rdata->pnfs_error)
                         rdata->pnfs_error = -EIO;
-                bl_set_lo_fail(rdata->lseg);
+                pnfs_set_lo_fail(rdata->lseg);
         }
         bio_put(bio);
         put_parallel(par);
@@ -370,7 +359,7 @@ static void bl_end_io_write_zero(struct bio *bio, int err)
         if (!uptodate) {
                 if (!wdata->pnfs_error)
                         wdata->pnfs_error = -EIO;
-                bl_set_lo_fail(wdata->lseg);
+                pnfs_set_lo_fail(wdata->lseg);
         }
         bio_put(bio);
         put_parallel(par);
@@ -386,7 +375,7 @@ static void bl_end_io_write(struct bio *bio, int err)
         if (!uptodate) {
                 if (!wdata->pnfs_error)
                         wdata->pnfs_error = -EIO;
-                bl_set_lo_fail(wdata->lseg);
+                pnfs_set_lo_fail(wdata->lseg);
         }
         bio_put(bio);
         put_parallel(par);
diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index e8915d4840a..4c78c62639e 100644
--- a/fs/nfs/nfs4filelayout.c
+++ b/fs/nfs/nfs4filelayout.c
@@ -77,19 +77,6 @@ filelayout_get_dserver_offset(struct pnfs_layout_segment *lseg, loff_t offset)
         BUG();
 }
 
-/* For data server errors we don't recover from */
-static void
-filelayout_set_lo_fail(struct pnfs_layout_segment *lseg)
-{
-        if (lseg->pls_range.iomode == IOMODE_RW) {
-                dprintk("%s Setting layout IOMODE_RW fail bit\n", __func__);
-                set_bit(lo_fail_bit(IOMODE_RW), &lseg->pls_layout->plh_flags);
-        } else {
-                dprintk("%s Setting layout IOMODE_READ fail bit\n", __func__);
-                set_bit(lo_fail_bit(IOMODE_READ), &lseg->pls_layout->plh_flags);
-        }
-}
-
 static int filelayout_async_handle_error(struct rpc_task *task,
                                          struct nfs4_state *state,
                                          struct nfs_client *clp,
@@ -145,7 +132,7 @@ static int filelayout_read_done_cb(struct rpc_task *task,
                 dprintk("%s calling restart ds_clp %p ds_clp->cl_session %p\n",
                         __func__, data->ds_clp, data->ds_clp->cl_session);
                 if (reset) {
-                        filelayout_set_lo_fail(data->lseg);
+                        pnfs_set_lo_fail(data->lseg);
                         nfs4_reset_read(task, data);
                         clp = NFS_SERVER(data->inode)->nfs_client;
                 }
@@ -221,7 +208,7 @@ static int filelayout_write_done_cb(struct rpc_task *task,
                 dprintk("%s calling restart ds_clp %p ds_clp->cl_session %p\n",
                         __func__, data->ds_clp, data->ds_clp->cl_session);
                 if (reset) {
-                        filelayout_set_lo_fail(data->lseg);
+                        pnfs_set_lo_fail(data->lseg);
                         nfs4_reset_write(task, data);
                         clp = NFS_SERVER(data->inode)->nfs_client;
                 } else
@@ -256,7 +243,7 @@ static int filelayout_commit_done_cb(struct rpc_task *task,
                         __func__, data->ds_clp, data->ds_clp->cl_session);
                 if (reset) {
                         prepare_to_resend_writes(data);
-                        filelayout_set_lo_fail(data->lseg);
+                        pnfs_set_lo_fail(data->lseg);
                 } else
                         nfs_restart_rpc(task, data->ds_clp);
                 return -EAGAIN;
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index e550e8836c3..6b19fffa812 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1381,6 +1381,18 @@ static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp)
         }
 }
 
+void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg)
+{
+        if (lseg->pls_range.iomode == IOMODE_RW) {
+                dprintk("%s Setting layout IOMODE_RW fail bit\n", __func__);
+                set_bit(lo_fail_bit(IOMODE_RW), &lseg->pls_layout->plh_flags);
+        } else {
+                dprintk("%s Setting layout IOMODE_READ fail bit\n", __func__);
+                set_bit(lo_fail_bit(IOMODE_READ), &lseg->pls_layout->plh_flags);
+        }
+}
+EXPORT_SYMBOL_GPL(pnfs_set_lo_fail);
+
 void
 pnfs_set_layoutcommit(struct nfs_write_data *wdata)
 {
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 01cbfd54f3c..94e760eb543 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -178,6 +178,7 @@ int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *, struct nfs_page *);
 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
 bool pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, struct nfs_page *req);
+void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
 int pnfs_layout_process(struct nfs4_layoutget *lgp);
 void pnfs_free_lseg_list(struct list_head *tmp_list);
 void pnfs_destroy_layout(struct nfs_inode *);