Subject: + ocfs2-add-dlm_recover_callback_support-in-sysfs.patch added to -mm tree
To: rgoldwyn@xxxxxxx,jlbec@xxxxxxxxxxxx,mfasheh@xxxxxxxx,rgoldwyn@xxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 25 Feb 2014 12:19:46 -0800
The patch titled
Subject: ocfs2: add dlm_recover_callback_support in sysfs
has been added to the -mm tree. Its filename is
ocfs2-add-dlm_recover_callback_support-in-sysfs.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/ocfs2-add-dlm_recover_callback_support-in-sysfs.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/ocfs2-add-dlm_recover_callback_support-in-sysfs.patch
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------------------------------------------------------
From: Goldwyn Rodrigues <rgoldwyn@xxxxxxx>
Subject: ocfs2: add dlm_recover_callback_support in sysfs
This is a part of the nocontrold feature which was incorporated sometime
back.
This is required for backward compatibility of the tools, specifically the
scenario where the tools with recovery callback is used with a kernel not
using the recovery callbacks (older kernel + newer tools). The tools look
for this file to understand if the kernel supports DLM recovery callbacks.
For kernels which support recovery callbacks but will miss this patch,
ocfs2 will continue to use the older API and would still be able to mount
the filesystem.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@xxxxxxxx>
Cc: Mark Fasheh <mfasheh@xxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ocfs2/stackglue.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff -puN fs/ocfs2/stackglue.c~ocfs2-add-dlm_recover_callback_support-in-sysfs fs/ocfs2/stackglue.c
--- a/fs/ocfs2/stackglue.c~ocfs2-add-dlm_recover_callback_support-in-sysfs
+++ a/fs/ocfs2/stackglue.c
@@ -601,11 +601,27 @@ static struct kobj_attribute ocfs2_attr_
ocfs2_cluster_stack_show,
ocfs2_cluster_stack_store);
+
+
+static ssize_t ocfs2_dlm_recover_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *buf)
+{
+ ssize_t ret;
+ ret = snprintf(buf, PAGE_SIZE, "1\n");
+ return ret;
+}
+
+static struct kobj_attribute ocfs2_attr_dlm_recover_support =
+ __ATTR(dlm_recover_callback_support, S_IFREG | S_IRUGO,
+ ocfs2_dlm_recover_show, NULL);
+
static struct attribute *ocfs2_attrs[] = {
&ocfs2_attr_max_locking_protocol.attr,
&ocfs2_attr_loaded_cluster_plugins.attr,
&ocfs2_attr_active_cluster_plugin.attr,
&ocfs2_attr_cluster_stack.attr,
+ &ocfs2_attr_dlm_recover_support.attr,
NULL,
};
_
Patches currently in -mm which might be from rgoldwyn@xxxxxxx are
ocfs2-fix-quota-file-corruption.patch
ocfs2-revert-iput-deferring-code-in-ocfs2_drop_dentry_lock.patch
ocfs2-add-dlm_recover_callback_support-in-sysfs.patch
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