glusterfs/SOURCES/0423-ctime-Fix-ctime-inconsisteny-with-utimensat.patch

From c140d30382306d08eaf2bc5c53e5be26d3e381e1 Mon Sep 17 00:00:00 2001
From: Kotresh HR <khiremat@redhat.com>
Date: Mon, 18 Nov 2019 05:24:33 -0500
Subject: [PATCH 423/449] ctime: Fix ctime inconsisteny with utimensat

Problem:
When touch is used to create a file, the ctime is not matching
atime and mtime which ideally should match. There is a difference
in nano seconds.

Cause:
When touch is used modify atime or mtime to current time (UTIME_NOW),
the current time is taken from kernel. The ctime gets updated to current
time when atime or mtime is updated. But the current time to update
ctime is taken from utime xlator. Hence the difference in nano seconds.

Fix:
When utimesat uses UTIME_NOW, use the current time from kernel.

>fixes: bz#1773530
>Change-Id: I9ccfa47dcd39df23396852b4216f1773c49250ce
>Signed-off-by: Kotresh HR <khiremat@redhat.com>

backport of: https://review.gluster.org/#/c/glusterfs/+/23719/
BUG: 1761932
Change-Id: I9ccfa47dcd39df23396852b4216f1773c49250ce
Signed-off-by: Kotresh HR <khiremat@redhat.com>
Reviewed-on: https://code.engineering.redhat.com/gerrit/202541
Tested-by: RHGS Build Bot <nigelb@redhat.com>
Reviewed-by: Sunil Kumar Heggodu Gopala Acharya <sheggodu@redhat.com>
---
 libglusterfs/src/glusterfs/xlator.h            |  2 ++
 tests/basic/ctime/ctime-utimesat.t             | 28 ++++++++++++++++++++++++++
 xlators/features/utime/src/utime-gen-fops-c.py | 10 +++++++++
 xlators/mount/fuse/src/fuse-bridge.c           |  8 ++++++++
 4 files changed, 48 insertions(+)
 create mode 100644 tests/basic/ctime/ctime-utimesat.t

diff --git a/libglusterfs/src/glusterfs/xlator.h b/libglusterfs/src/glusterfs/xlator.h
index da551e9..db04c4d 100644
--- a/libglusterfs/src/glusterfs/xlator.h
+++ b/libglusterfs/src/glusterfs/xlator.h
@@ -35,6 +35,8 @@
 #define GF_SET_ATTR_ATIME 0x10
 #define GF_SET_ATTR_MTIME 0x20
 #define GF_SET_ATTR_CTIME 0x40
+#define GF_ATTR_ATIME_NOW 0x80
+#define GF_ATTR_MTIME_NOW 0x100
 
 #define gf_attr_mode_set(mode) ((mode)&GF_SET_ATTR_MODE)
 #define gf_attr_uid_set(mode) ((mode)&GF_SET_ATTR_UID)
diff --git a/tests/basic/ctime/ctime-utimesat.t b/tests/basic/ctime/ctime-utimesat.t
new file mode 100644
index 0000000..540e57a
--- /dev/null
+++ b/tests/basic/ctime/ctime-utimesat.t
@@ -0,0 +1,28 @@
+#!/bin/bash
+. $(dirname $0)/../../include.rc
+. $(dirname $0)/../../volume.rc
+. $(dirname $0)/../../afr.rc
+cleanup;
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 replica 3 $H0:$B0/${V0}{0,1,2}
+TEST $CLI volume set $V0 performance.stat-prefetch off
+TEST $CLI volume set $V0 performance.read-ahead off
+TEST $CLI volume set $V0 performance.quick-read off
+TEST $CLI volume set $V0 performance.read-after-open off
+TEST $CLI volume set $V0 performance.open-behind off
+TEST $CLI volume set $V0 performance.write-behind off
+TEST $CLI volume set $V0 performance.io-cache off
+
+TEST $CLI volume start $V0
+
+TEST glusterfs --volfile-id=$V0 --volfile-server=$H0 --entry-timeout=0 $M0;
+
+touch $M0/FILE
+
+atime=$(stat -c "%.X" $M0/FILE)
+EXPECT $atime stat -c "%.Y" $M0/FILE
+EXPECT $atime stat -c "%.Z" $M0/FILE
+
+cleanup
diff --git a/xlators/features/utime/src/utime-gen-fops-c.py b/xlators/features/utime/src/utime-gen-fops-c.py
index 8730a51..9fb3e1b 100755
--- a/xlators/features/utime/src/utime-gen-fops-c.py
+++ b/xlators/features/utime/src/utime-gen-fops-c.py
@@ -95,6 +95,16 @@ gf_utime_@NAME@ (call_frame_t *frame, xlator_t *this,
                 frame->root->flags |= MDATA_CTIME;
         }
 
+        if (valid & (GF_SET_ATTR_ATIME | GF_SET_ATTR_MTIME)) {
+            if (valid & GF_ATTR_ATIME_NOW) {
+                frame->root->ctime.tv_sec = stbuf->ia_atime;
+                frame->root->ctime.tv_nsec = stbuf->ia_atime_nsec;
+            } else if (valid & GF_ATTR_MTIME_NOW) {
+                frame->root->ctime.tv_sec = stbuf->ia_mtime;
+                frame->root->ctime.tv_nsec = stbuf->ia_mtime_nsec;
+            }
+        }
+
         STACK_WIND (frame, gf_utime_@NAME@_cbk, FIRST_CHILD(this),
                     FIRST_CHILD(this)->fops->@NAME@, @SHORT_ARGS@);
         return 0;
diff --git a/xlators/mount/fuse/src/fuse-bridge.c b/xlators/mount/fuse/src/fuse-bridge.c
index 6e99053..fdeec49 100644
--- a/xlators/mount/fuse/src/fuse-bridge.c
+++ b/xlators/mount/fuse/src/fuse-bridge.c
@@ -1706,6 +1706,14 @@ fattr_to_gf_set_attr(int32_t valid)
         gf_valid |= GF_SET_ATTR_CTIME;
 #endif
 
+#if FUSE_KERNEL_MINOR_VERSION >= 9
+    if (valid & FATTR_ATIME_NOW)
+        gf_valid |= GF_ATTR_ATIME_NOW;
+
+    if (valid & FATTR_MTIME_NOW)
+        gf_valid |= GF_ATTR_MTIME_NOW;
+#endif
+
     if (valid & FATTR_SIZE)
         gf_valid |= GF_SET_ATTR_SIZE;
 
-- 
1.8.3.1