staging/lustre: use 64-bit inode timestamps internally

Lustre has 64-bit timestamps in its network data structures, but
on 32 bit systems, it converts them directly into time_t, which is
32 bit wide.

This changes the code to use 64-bit time stamps for files. The Linux
VFS code still uses time_t though, and will be changed in a separate
patch series.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/include/cl_object.h

@@ -173,11 +173,11 @@ struct cl_attr {
 	 */
 	loff_t cat_kms;
 	/** Modification time. Measured in seconds since epoch. */
-	time_t cat_mtime;
+	time64_t cat_mtime;
 	/** Access time. Measured in seconds since epoch. */
-	time_t cat_atime;
+	time64_t cat_atime;
 	/** Change time. Measured in seconds since epoch. */
-	time_t cat_ctime;
+	time64_t cat_ctime;
 	/**
 	 * Blocks allocated to this cl_object on the server file system.
 	 *

drivers/staging/lustre/lustre/llite/llite_internal.h

@@ -851,7 +851,7 @@ struct vvp_io {
 			 * Inode modification time that is checked across DLM
 			 * lock request.
 			 */
-			time_t		 ft_mtime;
+			time64_t	    ft_mtime;
 			struct vm_area_struct *ft_vma;
 			/**
 			 *  locked page returned from vvp_io

drivers/staging/lustre/lustre/llite/vvp_io.c

@@ -109,7 +109,7 @@ static int vvp_io_fault_iter_init(const struct lu_env *env,
 
 	LASSERT(inode ==
 		file_inode(cl2ccc_io(env, ios)->cui_fd->fd_file));
-	vio->u.fault.ft_mtime = LTIME_S(inode->i_mtime);
+	vio->u.fault.ft_mtime = inode->i_mtime.tv_sec;
 	return 0;
 }
 
@@ -661,7 +661,7 @@ static int vvp_io_fault_start(const struct lu_env *env,
 	pgoff_t	      last; /* last page in a file data region */
 
 	if (fio->ft_executable &&
-	    LTIME_S(inode->i_mtime) != vio->u.fault.ft_mtime)
+	    inode->i_mtime.tv_sec != vio->u.fault.ft_mtime)
 		CWARN("binary "DFID
 		      " changed while waiting for the page fault lock\n",
 		      PFID(lu_object_fid(&obj->co_lu)));

drivers/staging/lustre/lustre/llite/vvp_object.c

@@ -87,9 +87,9 @@ static int vvp_attr_get(const struct lu_env *env, struct cl_object *obj,
 	 */
 
 	attr->cat_size = i_size_read(inode);
-	attr->cat_mtime = LTIME_S(inode->i_mtime);
-	attr->cat_atime = LTIME_S(inode->i_atime);
-	attr->cat_ctime = LTIME_S(inode->i_ctime);
+	attr->cat_mtime = inode->i_mtime.tv_sec;
+	attr->cat_atime = inode->i_atime.tv_sec;
+	attr->cat_ctime = inode->i_ctime.tv_sec;
 	attr->cat_blocks = inode->i_blocks;
 	attr->cat_uid = from_kuid(&init_user_ns, inode->i_uid);
 	attr->cat_gid = from_kgid(&init_user_ns, inode->i_gid);
@@ -107,11 +107,11 @@ static int vvp_attr_set(const struct lu_env *env, struct cl_object *obj,
 	if (valid & CAT_GID)
 		inode->i_gid = make_kgid(&init_user_ns, attr->cat_gid);
 	if (valid & CAT_ATIME)
-		LTIME_S(inode->i_atime) = attr->cat_atime;
+		inode->i_atime.tv_sec = attr->cat_atime;
 	if (valid & CAT_MTIME)
-		LTIME_S(inode->i_mtime) = attr->cat_mtime;
+		inode->i_mtime.tv_sec = attr->cat_mtime;
 	if (valid & CAT_CTIME)
-		LTIME_S(inode->i_ctime) = attr->cat_ctime;
+		inode->i_ctime.tv_sec = attr->cat_ctime;
 	if (0 && valid & CAT_SIZE)
 		cl_isize_write_nolock(inode, attr->cat_size);
 	/* not currently necessary */

drivers/staging/lustre/lustre/osc/osc_io.c

@@ -518,7 +518,7 @@ static int osc_io_read_start(const struct lu_env *env,
 
 	if (!slice->cis_io->ci_noatime) {
 		cl_object_attr_lock(obj);
-		attr->cat_atime = LTIME_S(CURRENT_TIME);
+		attr->cat_atime = ktime_get_real_seconds();
 		rc = cl_object_attr_set(env, obj, attr, CAT_ATIME);
 		cl_object_attr_unlock(obj);
 	}
@@ -534,7 +534,7 @@ static int osc_io_write_start(const struct lu_env *env,
 
 	OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_SETTIME, 1);
 	cl_object_attr_lock(obj);
-	attr->cat_mtime = attr->cat_ctime = LTIME_S(CURRENT_TIME);
+	attr->cat_mtime = attr->cat_ctime = ktime_get_real_seconds();
 	rc = cl_object_attr_set(env, obj, attr, CAT_MTIME | CAT_CTIME);
 	cl_object_attr_unlock(obj);