nfs: Add DEALLOCATE support

[karo-tx-linux.git] / fs / nfs / nfs42proc.c

diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index 581f34e9d8a01ea5ff6f6b652bd940ea9f24f5e0..cb170722769cd807990177274bc5a70e64bf806a 100644 (file)
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -90,6 +90,23 @@ int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
        return err;
 }
 
+int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
+{
+       struct rpc_message msg = {
+               .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
+       };
+       struct inode *inode = file_inode(filep);
+       int err;
+
+       if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
+               return -EOPNOTSUPP;
+
+       err = nfs42_proc_fallocate(&msg, filep, offset, len);
+       if (err == -EOPNOTSUPP)
+               NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
+       return err;
+}
+
 loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
 {
        struct inode *inode = file_inode(filep);