[09/13] btrfs-progs: function to release a specific fsid from the list

Commit Message

Anand Jain June 21, 2013, 7:58 a.m. UTC

this is preparatory so that fsid found in the kernel can be
added

Signed-off-by: Anand Jain <[e-mail]>
---
 volumes.c | 20 +++++++++++++++++++-
 volumes.h |  3 +++
 2 files changed, 22 insertions(+), 1 deletion(-)

Patch

diff --git a/volumes.c b/volumes.c
index aa1c3dd..81904c6 100644
--- a/volumes.c
+++ b/volumes.c
@@ -87,7 +87,7 @@  static struct btrfs_fs_devices *find_fsid(u8 *fsid)
 	return NULL;
 }
 
-static int device_list_add(const char *path,
+int device_list_add(const char *path,
 			   struct btrfs_super_block *disk_super,
 			   u64 devid, struct btrfs_fs_devices **fs_devices_ret)
 {
@@ -154,6 +154,24 @@  static int device_list_add(const char *path,
 	return 0;
 }
 
+void device_list_fini(u8 *fsid)
+{
+	struct list_head *fsids;
+	struct list_head *cur_fsid;
+	struct btrfs_fs_devices *fs_devices;
+
+	fsids = btrfs_scanned_uuids();
+	list_for_each(cur_fsid, fsids) {
+		fs_devices = list_entry(cur_fsid, struct btrfs_fs_devices,
+				list);
+		if (!memcmp(fs_devices->fsid, fsid, BTRFS_FSID_SIZE)) {
+			list_del(&fs_devices->devices);
+			list_del(&fs_devices->list);
+			break;
+		}
+	}
+}
+
 int btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
 {
 	struct btrfs_fs_devices *seed_devices;
diff --git a/volumes.h b/volumes.h
index 911f788..6286d83 100644
--- a/volumes.h
+++ b/volumes.h
@@ -190,4 +190,7 @@  int btrfs_add_system_chunk(struct btrfs_trans_handle *trans,
 int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset);
 struct btrfs_device *btrfs_find_device_by_devid(struct btrfs_root *root,
                                                 u64 devid, int instance);
+int device_list_add(const char *path, struct btrfs_super_block *disk_super,
+			   u64 devid, struct btrfs_fs_devices **fs_devices_ret);
+void device_list_fini(u8 *fsid);
 #endif