ctime: Provide noatime option

Most of the applications are {c|m}time dependant
and very few are atime dependant. So provide noatime
option to not update atime when ctime feature is
enabled.

Also this option has to be enabled with ctime
feature to avoid unnecessary self heal. Since
AFR/EC reads data from single subvolume, atime
is only updated in one subvolume triggering self
heal.

updates: bz#1593538
Change-Id: I085fb33c882296545345f5df194cde7b6cbc337e
Signed-off-by: Kotresh HR <khiremat@redhat.com>

8 files changed, 123 insertions, 9 deletions

diff --git a/xlators/features/utime/src/Makefile.am b/xlators/features/utime/src/Makefile.am
index e94a00a8326..7c3adbc2195 100644
--- a/xlators/features/utime/src/Makefile.am
+++ b/xlators/features/utime/src/Makefile.am
@@ -15,6 +15,8 @@ utime_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la
 
 noinst_HEADERS_utime  = $(UTIME_SRC)/utime-helpers.h
 noinst_HEADERS_utime += $(UTIME_SRC)/utime.h
+noinst_HEADERS_utime += $(UTIME_SRC)/utime-messages.h
+noinst_HEADERS_utime += $(UTIME_SRC)/utime-mem-types.h
 noinst_HEADERS = $(top_srcdir)/xlators/lib/src/libxlator.h
 noinst_HEADERS += $(noinst_HEADERS_utime)
 
diff --git a/xlators/features/utime/src/utime-gen-fops-c.py b/xlators/features/utime/src/utime-gen-fops-c.py
index d7f12d18f2b..ab56dc9a4b3 100644
--- a/xlators/features/utime/src/utime-gen-fops-c.py
+++ b/xlators/features/utime/src/utime-gen-fops-c.py
@@ -16,7 +16,7 @@ gf_utime_@NAME@ (call_frame_t *frame, xlator_t *this,
 {
         gl_timespec_get(&frame->root->ctime);
 
-        (void) utime_update_attribute_flags(frame, GF_FOP_@UPNAME@);
+        (void) utime_update_attribute_flags(frame, this, GF_FOP_@UPNAME@);
         STACK_WIND (frame, gf_utime_@NAME@_cbk, FIRST_CHILD(this),
                     FIRST_CHILD(this)->fops->@NAME@, @SHORT_ARGS@);
         return 0;
@@ -41,7 +41,7 @@ gf_utime_@NAME@ (call_frame_t *frame, xlator_t *this,
 {
         gl_timespec_get(&frame->root->ctime);
 
-        (void) utime_update_attribute_flags(frame, GF_FOP_READ);
+        (void) utime_update_attribute_flags(frame, this, GF_FOP_READ);
         STACK_WIND (frame, gf_utime_@NAME@_cbk, FIRST_CHILD(this),
                     FIRST_CHILD(this)->fops->@NAME@, @SHORT_ARGS@);
         return 0;
@@ -55,7 +55,7 @@ gf_utime_@NAME@ (call_frame_t *frame, xlator_t *this,
 {
         gl_timespec_get(&frame->root->ctime);
 
-        (void) utime_update_attribute_flags(frame, GF_FOP_WRITE);
+        (void) utime_update_attribute_flags(frame, this, GF_FOP_WRITE);
         STACK_WIND (frame, gf_utime_@NAME@_cbk, FIRST_CHILD(this),
                     FIRST_CHILD(this)->fops->@NAME@, @SHORT_ARGS@);
         return 0;
diff --git a/xlators/features/utime/src/utime-helpers.c b/xlators/features/utime/src/utime-helpers.c
index 2d74bc76e07..c79e12badfa 100644
--- a/xlators/features/utime/src/utime-helpers.c
+++ b/xlators/features/utime/src/utime-helpers.c
@@ -9,6 +9,7 @@
 */
 
 #include "utime-helpers.h"
+#include "utime.h"
 
 void
 gl_timespec_get(struct timespec *ts)
@@ -21,12 +22,17 @@ gl_timespec_get(struct timespec *ts)
 }
 
 void
-utime_update_attribute_flags(call_frame_t *frame, glusterfs_fop_t fop)
+utime_update_attribute_flags(call_frame_t *frame, xlator_t *this,
+                             glusterfs_fop_t fop)
 {
-    if (!frame) {
+    utime_priv_t *utime_priv = NULL;
+
+    if (!frame || !this) {
         goto out;
     }
 
+    utime_priv = this->private;
+
     switch (fop) {
         case GF_FOP_SETXATTR:
         case GF_FOP_FSETXATTR:
@@ -42,9 +48,10 @@ utime_update_attribute_flags(call_frame_t *frame, glusterfs_fop_t fop)
         case GF_FOP_OPENDIR:
         case GF_FOP_OPEN:
         case GF_FOP_READ:
-            frame->root->flags |= MDATA_ATIME;
+            if (!utime_priv->noatime) {
+                frame->root->flags |= MDATA_ATIME;
+            }
             break;
-
         case GF_FOP_MKNOD:
         case GF_FOP_MKDIR:
         case GF_FOP_SYMLINK:
diff --git a/xlators/features/utime/src/utime-helpers.h b/xlators/features/utime/src/utime-helpers.h
index 4efe75619eb..b89867a3db3 100644
--- a/xlators/features/utime/src/utime-helpers.h
+++ b/xlators/features/utime/src/utime-helpers.h
@@ -13,12 +13,14 @@
 
 #include "glusterfs-fops.h"
 #include "stack.h"
+#include "xlator.h"
 #include "timespec.h"
 #include <time.h>
 
 void
 gl_timespec_get(struct timespec *ts);
 void
-utime_update_attribute_flags(call_frame_t *frame, glusterfs_fop_t fop);
+utime_update_attribute_flags(call_frame_t *frame, xlator_t *this,
+                             glusterfs_fop_t fop);
 
 #endif /* _UTIME_HELPERS_H */
diff --git a/xlators/features/utime/src/utime-mem-types.h b/xlators/features/utime/src/utime-mem-types.h
new file mode 100644
index 00000000000..fbd9aff0eca
--- /dev/null
+++ b/xlators/features/utime/src/utime-mem-types.h
@@ -0,0 +1,21 @@
+/*
+  Copyright (c) 2018 Red Hat, Inc. <http://www.redhat.com>
+  This file is part of GlusterFS.
+
+  This file is licensed to you under your choice of the GNU Lesser
+  General Public License, version 3 or any later version (LGPLv3 or
+  later), or the GNU General Public License, version 2 (GPLv2), in all
+  cases as published by the Free Software Foundation.
+*/
+
+#ifndef __UTIME_MEM_TYPES_H__
+#define __UTIME_MEM_TYPES_H__
+
+#include "mem-types.h"
+
+enum gf_utime_mem_types_ {
+    utime_mt_utime_t = gf_common_mt_end + 1,
+    utime_mt_end
+};
+
+#endif /* __UTIME_MEM_TYPES_H__ */
diff --git a/xlators/features/utime/src/utime-messages.h b/xlators/features/utime/src/utime-messages.h
new file mode 100644
index 00000000000..7613c335d43
--- /dev/null
+++ b/xlators/features/utime/src/utime-messages.h
@@ -0,0 +1,28 @@
+/*
+  Copyright (c) 2018 Red Hat, Inc. <http://www.redhat.com>
+  This file is part of GlusterFS.
+
+  This file is licensed to you under your choice of the GNU Lesser
+  General Public License, version 3 or any later version (LGPLv3 or
+  later), or the GNU General Public License, version 2 (GPLv2), in all
+  cases as published by the Free Software Foundation.
+*/
+
+#ifndef __UTIME_MESSAGES_H__
+#define __UTIME_MESSAGES_H__
+
+#include "glfs-message-id.h"
+
+/* To add new message IDs, append new identifiers at the end of the list.
+ *
+ * Never remove a message ID. If it's not used anymore, you can rename it or
+ * leave it as it is, but not delete it. This is to prevent reutilization of
+ * IDs by other messages.
+ *
+ * The component name must match one of the entries defined in
+ * glfs-message-id.h.
+ */
+
+GLFS_MSGID(UTIME, UTIME_MSG_NO_MEMORY);
+
+#endif /* __UTIME_MESSAGES_H__ */
diff --git a/xlators/features/utime/src/utime.c b/xlators/features/utime/src/utime.c
index 7671904b717..418e4c4a0d5 100644
--- a/xlators/features/utime/src/utime.c
+++ b/xlators/features/utime/src/utime.c
@@ -9,6 +9,8 @@
 */
 
 #include "utime.h"
+#include "utime-messages.h"
+#include "utime-mem-types.h"
 
 int32_t
 gf_utime_invalidate(xlator_t *this, inode_t *inode)
@@ -120,21 +122,57 @@ gf_utime_priv(xlator_t *this)
 }
 
 int32_t
+mem_acct_init(xlator_t *this)
+{
+    if (xlator_mem_acct_init(this, utime_mt_end + 1) != 0) {
+        gf_msg(this->name, GF_LOG_ERROR, ENOMEM, UTIME_MSG_NO_MEMORY,
+               "Memory accounting initialization failed.");
+        return -1;
+    }
+    return 0;
+}
+
+int32_t
 init(xlator_t *this)
 {
+    utime_priv_t *utime = NULL;
+
+    utime = GF_MALLOC(sizeof(*utime), utime_mt_utime_t);
+    if (utime == NULL) {
+        gf_msg(this->name, GF_LOG_ERROR, ENOMEM, UTIME_MSG_NO_MEMORY,
+               "Failed to allocate private memory.");
+        return -1;
+    }
+    memset(utime, 0, sizeof(*utime));
+
+    this->private = utime;
+    GF_OPTION_INIT("noatime", utime->noatime, bool, err);
+
     return 0;
+err:
+    return -1;
 }
 
 void
 fini(xlator_t *this)
 {
+    utime_priv_t *utime = NULL;
+
+    utime = this->private;
+    GF_FREE(utime);
     return;
 }
 
 int32_t
-reconfigure(xlator_t *this, dict_t *dict)
+reconfigure(xlator_t *this, dict_t *options)
 {
+    utime_priv_t *utime = this->private;
+
+    GF_OPTION_RECONF("noatime", utime->noatime, options, bool, err);
+
     return 0;
+err:
+    return -1;
 }
 
 int
@@ -180,3 +218,15 @@ struct xlator_dumpops dumpops = {
     .priv_to_dict = gf_utime_priv_to_dict,
     .priv = gf_utime_priv,
 };
+
+struct volume_options options[] = {
+    {.key = {"noatime"},
+     .type = GF_OPTION_TYPE_BOOL,
+     .default_value = "on",
+     .op_version = {GD_OP_VERSION_5_0},
+     .flags = OPT_FLAG_SETTABLE | OPT_FLAG_CLIENT_OPT | OPT_FLAG_DOC,
+     .tags = {"ctime"},
+     .description = "Enable/Disable atime updation when ctime feature is "
+                    "enabled. When noatime is on, atime is not updated with "
+                    "ctime feature enabled and vice versa."},
+    {.key = {NULL}}};
diff --git a/xlators/features/utime/src/utime.h b/xlators/features/utime/src/utime.h
index f8d5eca082e..236183d4bcc 100644
--- a/xlators/features/utime/src/utime.h
+++ b/xlators/features/utime/src/utime.h
@@ -16,4 +16,8 @@
 #include "defaults.h"
 #include "utime-autogen-fops.h"
 
+typedef struct utime_priv {
+    gf_boolean_t noatime;
+} utime_priv_t;
+
 #endif /* __UTIME_H__ */