New API: btrfs_qgroup_create

btrfs_qgroup_create creates a new qgroup.

Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>

daemon/btrfs.c

@@ -1120,3 +1120,36 @@ do_btrfs_qgroup_limit (const char *subvolume, int64_t size)
 
   return 0;
 }
+
+int
+do_btrfs_qgroup_create (const char *qgroupid, const char *subvolume)
+{
+  const size_t MAX_ARGS = 64;
+  const char *argv[MAX_ARGS];
+  size_t i = 0;
+  CLEANUP_FREE char *subvolume_buf = NULL;
+  CLEANUP_FREE char *err = NULL;
+  CLEANUP_FREE char *out = NULL;
+  int r;
+
+  subvolume_buf = sysroot_path (subvolume);
+  if (subvolume_buf == NULL) {
+    reply_with_perror ("malloc");
+    return -1;
+  }
+
+  ADD_ARG (argv, i, str_btrfs);
+  ADD_ARG (argv, i, "qgroup");
+  ADD_ARG (argv, i, "create");
+  ADD_ARG (argv, i, qgroupid);
+  ADD_ARG (argv, i, subvolume_buf);
+  ADD_ARG (argv, i, NULL);
+
+  r = commandv (&out, &err, argv);
+  if (r == -1) {
+    reply_with_error ("%s: %s", subvolume, err);
+    return -1;
+  }
+
+  return 0;
+}

generator/actions.ml

@@ -12153,6 +12153,23 @@ Trash all qgroup numbers and scan the metadata again with the current config." }
 Limit the size of a subvolume which's path is C<subvolume>. C<size>
 can have suffix of G, M, or K. " };
 
+  { defaults with
+    name = "btrfs_qgroup_create";
+    style = RErr, [String "qgroupid"; Pathname "subvolume"], [];
+    proc_nr = Some 430;
+    optional = Some "btrfs"; camel_name = "BTRFSQgroupCreate";
+    tests = [
+      InitPartition, Always, TestRun (
+        [["mkfs_btrfs"; "/dev/sda1"; ""; ""; "NOARG"; ""; "NOARG"; "NOARG"; ""; ""];
+         ["mount"; "/dev/sda1"; "/"];
+         ["btrfs_quota_enable"; "/"; "true"];
+         ["btrfs_subvolume_create"; "/sub1"; "NOARG"];
+         ["btrfs_qgroup_create"; "0/1000"; "/sub1"]]), [];
+    ];
+    shortdesc = "create a subvolume quota group";
+    longdesc = "\
+Create a quota group (qgroup) for subvolume at C<subvolume>." };
+
 ]
 
 (* Non-API meta-commands available only in guestfish.

src/MAX_PROC_NR

@@ -1 +1 @@
-429
+430