From: Omar Sandoval <osandov@xxxxxx>
This reports the latest send stream version supported by the kernel.
Signed-off-by: Omar Sandoval <osandov@xxxxxx>
---
fs/btrfs/sysfs.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 8593086d1d10..34d21edff7d7 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -14,6 +14,7 @@
#include "ctree.h"
#include "discard.h"
#include "disk-io.h"
+#include "send.h"
#include "transaction.h"
#include "sysfs.h"
#include "volumes.h"
@@ -321,9 +322,17 @@ static ssize_t supported_checksums_show(struct kobject *kobj,
}
BTRFS_ATTR(static_feature, supported_checksums, supported_checksums_show);
+static ssize_t send_stream_version_show(struct kobject *kobj,
+ struct kobj_attribute *ka, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", BTRFS_SEND_STREAM_VERSION);
+}
+BTRFS_ATTR(static_feature, send_stream_version, send_stream_version_show);
+
static struct attribute *btrfs_supported_static_feature_attrs[] = {
BTRFS_ATTR_PTR(static_feature, rmdir_subvol),
BTRFS_ATTR_PTR(static_feature, supported_checksums),
+ BTRFS_ATTR_PTR(static_feature, send_stream_version),
NULL
};
--
2.28.0
