[v2,1/4] btrfs: sysfs, add UUID/devinfo kobject
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Message ID 1581499693-22407-2-git-send-email-anand.jain@oracle.com
State New
Headers show
Series
  • btrfs: sysfs, add devinfo, fix devid and cleanups
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Commit Message

Anand Jain Feb. 12, 2020, 9:28 a.m. UTC
Creates kobject /sys/fs/btrfs/UUID/devinfo to hold
btrfs_fs_devices::dev_state attribute.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
v2: update change log.

 fs/btrfs/sysfs.c   | 15 +++++++++++++++
 fs/btrfs/volumes.h |  1 +
 2 files changed, 16 insertions(+)

Patch
diff mbox series

diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 7436422194da..6bac61c42c05 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -901,6 +901,12 @@  static int addrm_unknown_feature_attrs(struct btrfs_fs_info *fs_info, bool add)
 
 static void __btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs)
 {
+	if (fs_devs->devinfo_kobj) {
+		kobject_del(fs_devs->devinfo_kobj);
+		kobject_put(fs_devs->devinfo_kobj);
+		fs_devs->devinfo_kobj = NULL;
+	}
+
 	if (fs_devs->devices_kobj) {
 		kobject_del(fs_devs->devices_kobj);
 		kobject_put(fs_devs->devices_kobj);
@@ -1369,6 +1375,15 @@  int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs)
 		return -ENOMEM;
 	}
 
+	fs_devs->devinfo_kobj = kobject_create_and_add("devinfo",
+						       &fs_devs->fsid_kobj);
+	if (!fs_devs->devinfo_kobj) {
+		btrfs_err(fs_devs->fs_info,
+			  "failed to init sysfs devinfo kobject");
+		btrfs_sysfs_remove_fsid(fs_devs);
+		return -ENOMEM;
+	}
+
 	return 0;
 }
 
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 690d4f5a0653..309cda477589 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -258,6 +258,7 @@  struct btrfs_fs_devices {
 	/* sysfs kobjects */
 	struct kobject fsid_kobj;
 	struct kobject *devices_kobj;
+	struct kobject *devinfo_kobj;
 	struct completion kobj_unregister;
 };