LU-3606 fallocate: Implement fallocate preallocate operation

[fs/lustre-release.git] / lustre / include / cl_object.h

diff --git a/lustre/include/cl_object.h b/lustre/include/cl_object.h
index 8795c82..fb93a94 100644 (file)
--- a/lustre/include/cl_object.h
+++ b/lustre/include/cl_object.h
@@ -1756,6 +1756,31 @@ struct cl_io_rw_common {
        size_t  crw_count;
        int     crw_nonblock;
 };
+enum cl_setattr_subtype {
+       /** regular setattr **/
+       CL_SETATTR_REG = 1,
+       /** truncate(2) **/
+       CL_SETATTR_TRUNC,
+       /** fallocate(2) - mode preallocate **/
+       CL_SETATTR_FALLOCATE
+};
+
+struct cl_io_range {
+       loff_t cir_pos;
+       size_t cir_count;
+};
+
+struct cl_io_pt {
+       struct cl_io_pt *cip_next;
+       struct kiocb cip_iocb;
+       struct iov_iter cip_iter;
+       struct file *cip_file;
+       enum cl_io_type cip_iot;
+       unsigned int cip_need_restart:1;
+       loff_t cip_pos;
+       size_t cip_count;
+       ssize_t cip_result;
+};
 
 /**
  * State for io.
@@ -1804,6 +1829,14 @@ struct cl_io {
                        int                      sa_stripe_index;
                        struct ost_layout        sa_layout;
                        const struct lu_fid     *sa_parent_fid;
+                       /* SETATTR interface is used for regular setattr, */
+                       /* truncate(2) and fallocate(2) subtypes */
+                       enum cl_setattr_subtype  sa_subtype;
+                       /* The following are used for fallocate(2) */
+                       int                      sa_falloc_mode;
+                       loff_t                   sa_falloc_offset;
+                       loff_t                   sa_falloc_len;
+                       loff_t                   sa_falloc_end;
                } ci_setattr;
                struct cl_data_version_io {
                        u64 dv_data_version;
@@ -2379,7 +2412,14 @@ static inline int cl_io_is_mkwrite(const struct cl_io *io)
 static inline int cl_io_is_trunc(const struct cl_io *io)
 {
        return io->ci_type == CIT_SETATTR &&
-               (io->u.ci_setattr.sa_avalid & ATTR_SIZE);
+               (io->u.ci_setattr.sa_avalid & ATTR_SIZE) &&
+               (io->u.ci_setattr.sa_subtype != CL_SETATTR_FALLOCATE);
+}
+
+static inline int cl_io_is_fallocate(const struct cl_io *io)
+{
+       return (io->ci_type == CIT_SETATTR) &&
+              (io->u.ci_setattr.sa_subtype == CL_SETATTR_FALLOCATE);
 }
 
 struct cl_io *cl_io_top(struct cl_io *io);