From: Oleg Drokin <gr...@linuxhacker.ru>
Add generic helpers to allow displaying oof lustre-specific values
in /sys/fs/lustre
Signed-off-by: Oleg Drokin <gr...@linuxhacker.ru>
---
.../staging/lustre/lustre/include/lprocfs_status.h | 21 +++++++++++++++++++
.../lustre/lustre/obdclass/lprocfs_status.c | 24 ++++++++++++++++++++++
2 files changed, 45 insertions(+)
diff --git a/drivers/staging/lustre/lustre/include/lprocfs_status.h
b/drivers/staging/lustre/lustre/include/lprocfs_status.h
index d030847..37f00e4 100644
--- a/drivers/staging/lustre/lustre/include/lprocfs_status.h
+++ b/drivers/staging/lustre/lustre/include/lprocfs_status.h
@@ -742,6 +742,27 @@ static struct file_operations name##_fops = {
\
.release = lprocfs_single_release, \
}
+struct lustre_attr {
+ struct attribute attr;
+ ssize_t (*show)(struct kobject *kobj, struct attribute *attr,
+ char *buf);
+ ssize_t (*store)(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t len);
+};
+
+#define LUSTRE_ATTR(name, mode, show, store) \
+static struct lustre_attr lustre_attr_##name = __ATTR(name, mode, show, store)
+
+#define LUSTRE_RO_ATTR(name) LUSTRE_ATTR(name, 0444, name##_show, NULL)
+#define LUSTRE_RW_ATTR(name) LUSTRE_ATTR(name, 0644, name##_show, name##_store)
+
+ssize_t lustre_attr_show(struct kobject *kobj, struct attribute *attr,
+ char *buf);
+ssize_t lustre_attr_store(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t len);
+
+extern const struct sysfs_ops lustre_sysfs_ops;
+
/* lproc_ptlrpc.c */
struct ptlrpc_request;
extern void target_print_req(void *seq_file, struct ptlrpc_request *req);
diff --git a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
index 57c6ddd..f7297ce 100644
--- a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
+++ b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
@@ -2057,3 +2057,27 @@ int lprocfs_obd_rd_max_pages_per_rpc(struct seq_file *m,
void *data)
EXPORT_SYMBOL(lprocfs_obd_rd_max_pages_per_rpc);
#endif
+
+ssize_t lustre_attr_show(struct kobject *kobj,
+ struct attribute *attr, char *buf)
+{
+ struct lustre_attr *a = container_of(attr, struct lustre_attr, attr);
+
+ return a->show ? a->show(kobj, attr, buf) : 0;
+}
+EXPORT_SYMBOL_GPL(lustre_attr_show);
+
+ssize_t lustre_attr_store(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t len)
+{
+ struct lustre_attr *a = container_of(attr, struct lustre_attr, attr);
+
+ return a->store ? a->store(kobj, attr, buf, len) : len;
+}
+EXPORT_SYMBOL_GPL(lustre_attr_store);
+
+const struct sysfs_ops lustre_sysfs_ops = {
+ .show = lustre_attr_show,
+ .store = lustre_attr_store,
+};
+EXPORT_SYMBOL_GPL(lustre_sysfs_ops);
--
2.1.0
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