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| author | Omar Sandoval <osandov@fb.com> | 2020-08-21 00:39:54 -0700 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-10-07 12:13:17 +0200 |
| commit | 7573df5547c00f067e4c0b2fd7cc99f3d3a2bda7 (patch) | |
| tree | 40f8b8e59ea13c10fa27abaafc8264cfb37161c3 | |
| parent | c9a949af13d6d8983de086d9ecbf34c4c94da73e (diff) | |
btrfs: sysfs: export supported send stream version
This reports the latest send stream version supported by the kernel as
the feature in /sys/fs/btrfs/features/send_stream_version .
Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
| -rw-r--r-- | fs/btrfs/sysfs.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index c71db7acb89d..13354de56201 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 }; |