NFS: move pnfs layouts to nfs_server structure
Layouts should be tracked per nfs_server (aka superblock)
instead of per struct nfs_client, which may have multiple FSIDs associated
with it.
Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
index d4d1954..74780f9 100644
--- a/fs/nfs/callback_proc.c
+++ b/fs/nfs/callback_proc.c
@@ -111,6 +111,7 @@
static u32 initiate_file_draining(struct nfs_client *clp,
struct cb_layoutrecallargs *args)
{
+ struct nfs_server *server;
struct pnfs_layout_hdr *lo;
struct inode *ino;
bool found = false;
@@ -118,21 +119,28 @@
LIST_HEAD(free_me_list);
spin_lock(&clp->cl_lock);
- list_for_each_entry(lo, &clp->cl_layouts, plh_layouts) {
- if (nfs_compare_fh(&args->cbl_fh,
- &NFS_I(lo->plh_inode)->fh))
- continue;
- ino = igrab(lo->plh_inode);
- if (!ino)
- continue;
- found = true;
- /* Without this, layout can be freed as soon
- * as we release cl_lock.
- */
- get_layout_hdr(lo);
- break;
+ rcu_read_lock();
+ list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
+ list_for_each_entry(lo, &server->layouts, plh_layouts) {
+ if (nfs_compare_fh(&args->cbl_fh,
+ &NFS_I(lo->plh_inode)->fh))
+ continue;
+ ino = igrab(lo->plh_inode);
+ if (!ino)
+ continue;
+ found = true;
+ /* Without this, layout can be freed as soon
+ * as we release cl_lock.
+ */
+ get_layout_hdr(lo);
+ break;
+ }
+ if (found)
+ break;
}
+ rcu_read_unlock();
spin_unlock(&clp->cl_lock);
+
if (!found)
return NFS4ERR_NOMATCHING_LAYOUT;
@@ -154,6 +162,7 @@
static u32 initiate_bulk_draining(struct nfs_client *clp,
struct cb_layoutrecallargs *args)
{
+ struct nfs_server *server;
struct pnfs_layout_hdr *lo;
struct inode *ino;
u32 rv = NFS4ERR_NOMATCHING_LAYOUT;
@@ -167,18 +176,24 @@
};
spin_lock(&clp->cl_lock);
- list_for_each_entry(lo, &clp->cl_layouts, plh_layouts) {
+ rcu_read_lock();
+ list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
if ((args->cbl_recall_type == RETURN_FSID) &&
- memcmp(&NFS_SERVER(lo->plh_inode)->fsid,
- &args->cbl_fsid, sizeof(struct nfs_fsid)))
+ memcmp(&server->fsid, &args->cbl_fsid,
+ sizeof(struct nfs_fsid)))
continue;
- if (!igrab(lo->plh_inode))
- continue;
- get_layout_hdr(lo);
- BUG_ON(!list_empty(&lo->plh_bulk_recall));
- list_add(&lo->plh_bulk_recall, &recall_list);
+
+ list_for_each_entry(lo, &server->layouts, plh_layouts) {
+ if (!igrab(lo->plh_inode))
+ continue;
+ get_layout_hdr(lo);
+ BUG_ON(!list_empty(&lo->plh_bulk_recall));
+ list_add(&lo->plh_bulk_recall, &recall_list);
+ }
}
+ rcu_read_unlock();
spin_unlock(&clp->cl_lock);
+
list_for_each_entry_safe(lo, tmp,
&recall_list, plh_bulk_recall) {
ino = lo->plh_inode;