[PATCH 4/4] xfs: consolidate sysfs ops (dbg, stats, log)

["Bill O'Donnell" <billodo@xxxxxxxxxx>]

As a part of the series to move xfs global stats from procfs to sysfs,
this patch consolidates the sysfs ops functions and removes redundancy.

Signed-off-by: Bill O'Donnell <billodo@xxxxxxxxxx>
---
 fs/xfs/xfs_stats.c |   2 +-
 fs/xfs/xfs_sysfs.c | 144 +++++++++++++++++------------------------------------
 2 files changed, 48 insertions(+), 98 deletions(-)

diff --git a/fs/xfs/xfs_stats.c b/fs/xfs/xfs_stats.c
index 05d5227..dc6ca67 100644
--- a/fs/xfs/xfs_stats.c
+++ b/fs/xfs/xfs_stats.c
@@ -92,7 +92,7 @@ int xfs_stats_format(char *buf)
                0);
 #endif
 
-return len;
+       return len;
 }
 
 void xfs_stats_clearall(void)
diff --git a/fs/xfs/xfs_sysfs.c b/fs/xfs/xfs_sysfs.c
index a094e20..6fd597b 100644
--- a/fs/xfs/xfs_sysfs.c
+++ b/fs/xfs/xfs_sysfs.c
@@ -54,6 +54,50 @@ struct kobj_type xfs_mp_ktype = {
        .release = xfs_sysfs_release,
 };
 
+static inline struct xlog *
+to_xlog(struct kobject *kobject)
+{
+       struct xfs_kobj *kobj = to_kobj(kobject);
+
+       return container_of(kobj, struct xlog, l_kobj);
+}
+
+STATIC ssize_t
+xfs_sysfs_object_show(
+       struct kobject          *kobject,
+       struct attribute        *attr,
+       char                    *buf)
+{
+       struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
+       struct kobj_type *ktype = get_ktype(kobject);
+       void *data = NULL;
+
+       if (ktype == &xfs_log_ktype)
+               data = to_xlog(kobject);
+       return xfs_attr->show ? xfs_attr->show(buf, data) : 0;
+}
+
+STATIC ssize_t
+xfs_sysfs_object_store(
+       struct kobject          *kobject,
+       struct attribute        *attr,
+       const char              *buf,
+       size_t                  count)
+{
+       struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
+       struct kobj_type *ktype = get_ktype(kobject);
+       void *data = NULL;
+
+       if (ktype == &xfs_log_ktype)
+               data = to_xlog(kobject);
+       return xfs_attr->store ? xfs_attr->store(buf, count, data) : 0;
+}
+
+static const struct sysfs_ops xfs_sysfs_ops = {
+       .show = xfs_sysfs_object_show,
+       .store = xfs_sysfs_object_store,
+};
+
 #ifdef DEBUG
 /* debug */
 
@@ -92,43 +136,14 @@ static struct attribute *xfs_dbg_attrs[] = {
        NULL,
 };
 
-STATIC ssize_t
-xfs_dbg_show(
-       struct kobject          *kobject,
-       struct attribute        *attr,
-       char                    *buf)
-{
-       struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
-
-       return xfs_attr->show ? xfs_attr->show(buf, NULL) : 0;
-}
-
-STATIC ssize_t
-xfs_dbg_store(
-       struct kobject          *kobject,
-       struct attribute        *attr,
-       const char              *buf,
-       size_t                  count)
-{
-       struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
-
-       return xfs_attr->store ? xfs_attr->store(buf, count, NULL) : 0;
-}
-
-static struct sysfs_ops xfs_dbg_ops = {
-       .show = xfs_dbg_show,
-       .store = xfs_dbg_store,
-};
-
 struct kobj_type xfs_dbg_ktype = {
        .release = xfs_sysfs_release,
-       .sysfs_ops = &xfs_dbg_ops,
+       .sysfs_ops = &xfs_sysfs_ops,
        .default_attrs = xfs_dbg_attrs,
 };
 
 #endif /* DEBUG */
 
-
 /* stats */
 
 STATIC ssize_t
@@ -166,37 +181,9 @@ static struct attribute *xfs_stats_attrs[] = {
        NULL,
 };
 
-STATIC ssize_t
-xfs_stats_show(
-       struct kobject          *kobject,
-       struct attribute        *attr,
-       char                    *buf)
-{
-       struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
-
-       return xfs_attr->show ? xfs_attr->show(buf, NULL) : 0;
-}
-
-STATIC ssize_t
-xfs_stats_store(
-       struct kobject          *kobject,
-       struct attribute        *attr,
-       const char              *buf,
-       size_t                  count)
-{
-       struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
-
-       return xfs_attr->store ? xfs_attr->store(buf, count, NULL) : 0;
-}
-
-static struct sysfs_ops xfs_stats_ops = {
-       .show = xfs_stats_show,
-       .store = xfs_stats_store,
-};
-
 struct kobj_type xfs_stats_ktype = {
        .release = xfs_sysfs_release,
-       .sysfs_ops = &xfs_stats_ops,
+       .sysfs_ops = &xfs_sysfs_ops,
        .default_attrs = xfs_stats_attrs,
 };
 
@@ -270,45 +257,8 @@ static struct attribute *xfs_log_attrs[] = {
        NULL,
 };
 
-static inline struct xlog *
-to_xlog(struct kobject *kobject)
-{
-       struct xfs_kobj *kobj = to_kobj(kobject);
-       return container_of(kobj, struct xlog, l_kobj);
-}
-
-STATIC ssize_t
-xfs_log_show(
-       struct kobject          *kobject,
-       struct attribute        *attr,
-       char                    *buf)
-{
-       struct xlog *log = to_xlog(kobject);
-       struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
-
-       return xfs_attr->show ? xfs_attr->show(buf, log) : 0;
-}
-
-STATIC ssize_t
-xfs_log_store(
-       struct kobject          *kobject,
-       struct attribute        *attr,
-       const char              *buf,
-       size_t                  count)
-{
-       struct xlog *log = to_xlog(kobject);
-       struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
-
-       return xfs_attr->store ? xfs_attr->store(buf, count, log) : 0;
-}
-
-static struct sysfs_ops xfs_log_ops = {
-       .show = xfs_log_show,
-       .store = xfs_log_store,
-};
-
 struct kobj_type xfs_log_ktype = {
        .release = xfs_sysfs_release,
-       .sysfs_ops = &xfs_log_ops,
+       .sysfs_ops = &xfs_sysfs_ops,
        .default_attrs = xfs_log_attrs,
 };
-- 
2.4.3