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authorTrond Myklebust <Trond.Myklebust@netapp.com>2012-10-11 13:43:38 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-10-15 10:49:43 -0400
commitd527e5c15de8de813cd0a2ad0b769f68c6226938 (patch)
treeb96a57f9c6a628d66b605b9f7ef7e579b01a35b1 /fs
parent8fcdc31b3d09bc348ff9bf752ae1291828756cfa (diff)
downloadop-kernel-dev-d527e5c15de8de813cd0a2ad0b769f68c6226938.zip
op-kernel-dev-d527e5c15de8de813cd0a2ad0b769f68c6226938.tar.gz
NFSv4.1: Do not call pnfs_return_layout() from an rpciod context
Move the call to pnfs_return_layout() to the read and write rpc_release() callbacks, so that it gets called from nfsiod, which is a more appropriate context. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/nfs4filelayout.c18
-rw-r--r--fs/nfs/pnfs.h1
2 files changed, 16 insertions, 3 deletions
diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index 816c2d0..e7aee56 100644
--- a/fs/nfs/nfs4filelayout.c
+++ b/fs/nfs/nfs4filelayout.c
@@ -122,12 +122,21 @@ static void filelayout_reset_read(struct nfs_read_data *data)
}
}
+static void filelayout_fenceme(struct inode *inode, struct pnfs_layout_hdr *lo)
+{
+ if (!test_and_clear_bit(NFS_LAYOUT_RETURN, &lo->plh_flags))
+ return;
+ clear_bit(NFS_INO_LAYOUTCOMMIT, &NFS_I(inode)->flags);
+ pnfs_return_layout(inode);
+}
+
static int filelayout_async_handle_error(struct rpc_task *task,
struct nfs4_state *state,
struct nfs_client *clp,
struct pnfs_layout_segment *lseg)
{
- struct inode *inode = lseg->pls_layout->plh_inode;
+ struct pnfs_layout_hdr *lo = lseg->pls_layout;
+ struct inode *inode = lo->plh_inode;
struct nfs_server *mds_server = NFS_SERVER(inode);
struct nfs4_deviceid_node *devid = FILELAYOUT_DEVID_NODE(lseg);
struct nfs_client *mds_client = mds_server->nfs_client;
@@ -204,8 +213,7 @@ static int filelayout_async_handle_error(struct rpc_task *task,
dprintk("%s DS connection error %d\n", __func__,
task->tk_status);
nfs4_mark_deviceid_unavailable(devid);
- clear_bit(NFS_INO_LAYOUTCOMMIT, &NFS_I(inode)->flags);
- _pnfs_return_layout(inode);
+ set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags);
rpc_wake_up(&tbl->slot_tbl_waitq);
/* fall through */
default:
@@ -330,7 +338,9 @@ static void filelayout_read_count_stats(struct rpc_task *task, void *data)
static void filelayout_read_release(void *data)
{
struct nfs_read_data *rdata = data;
+ struct pnfs_layout_hdr *lo = rdata->header->lseg->pls_layout;
+ filelayout_fenceme(lo->plh_inode, lo);
nfs_put_client(rdata->ds_clp);
rdata->header->mds_ops->rpc_release(data);
}
@@ -428,7 +438,9 @@ static void filelayout_write_count_stats(struct rpc_task *task, void *data)
static void filelayout_write_release(void *data)
{
struct nfs_write_data *wdata = data;
+ struct pnfs_layout_hdr *lo = wdata->header->lseg->pls_layout;
+ filelayout_fenceme(lo->plh_inode, lo);
nfs_put_client(wdata->ds_clp);
wdata->header->mds_ops->rpc_release(data);
}
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 2d722db..dbf7bba 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -62,6 +62,7 @@ enum {
NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */
NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */
NFS_LAYOUT_ROC, /* some lseg had roc bit set */
+ NFS_LAYOUT_RETURN, /* Return this layout ASAP */
};
enum layoutdriver_policy_flags {
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