1 files changed, 85 insertions, 0 deletions

diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
new file mode 100644
index 000000000000..ece27e42b93b
--- /dev/null
+++ b/fs/nfs/callback_proc.c
@@ -0,0 +1,85 @@
+/*
+ * linux/fs/nfs/callback_proc.c
+ *
+ * Copyright (C) 2004 Trond Myklebust
+ *
+ * NFSv4 callback procedures
+ */
+#include <linux/config.h>
+#include <linux/nfs4.h>
+#include <linux/nfs_fs.h>
+#include "callback.h"
+#include "delegation.h"
+
+#define NFSDBG_FACILITY NFSDBG_CALLBACK
+ 
+unsigned nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res)
+{
+        struct nfs4_client *clp;
+        struct nfs_delegation *delegation;
+        struct nfs_inode *nfsi;
+        struct inode *inode;
+        
+        res->bitmap[0] = res->bitmap[1] = 0;
+        res->status = htonl(NFS4ERR_BADHANDLE);
+        clp = nfs4_find_client(&args->addr->sin_addr);
+        if (clp == NULL)
+                goto out;
+        inode = nfs_delegation_find_inode(clp, &args->fh);
+        if (inode == NULL)
+                goto out_putclient;
+        nfsi = NFS_I(inode);
+        down_read(&nfsi->rwsem);
+        delegation = nfsi->delegation;
+        if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0)
+                goto out_iput;
+        res->size = i_size_read(inode);
+        res->change_attr = NFS_CHANGE_ATTR(inode);
+        res->ctime = inode->i_ctime;
+        res->mtime = inode->i_mtime;
+        res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) &
+                args->bitmap[0];
+        res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) &
+                args->bitmap[1];
+        res->status = 0;
+out_iput:
+        up_read(&nfsi->rwsem);
+        iput(inode);
+out_putclient:
+        nfs4_put_client(clp);
+out:
+        dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res->status));
+        return res->status;
+}
+
+unsigned nfs4_callback_recall(struct cb_recallargs *args, void *dummy)
+{
+        struct nfs4_client *clp;
+        struct inode *inode;
+        unsigned res;
+        
+        res = htonl(NFS4ERR_BADHANDLE);
+        clp = nfs4_find_client(&args->addr->sin_addr);
+        if (clp == NULL)
+                goto out;
+        inode = nfs_delegation_find_inode(clp, &args->fh);
+        if (inode == NULL)
+                goto out_putclient;
+        /* Set up a helper thread to actually return the delegation */
+        switch(nfs_async_inode_return_delegation(inode, &args->stateid)) {
+                case 0:
+                        res = 0;
+                        break;
+                case -ENOENT:
+                        res = htonl(NFS4ERR_BAD_STATEID);
+                        break;
+                default:
+                        res = htonl(NFS4ERR_RESOURCE);
+        }
+        iput(inode);
+out_putclient:
+        nfs4_put_client(clp);
+out:
+        dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res));
+        return res;
+}