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Diffstat (limited to 'fs/nfs/callback_proc.c')
-rw-r--r--fs/nfs/callback_proc.c85
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;
+}