[Libguestfs] [PATCH v2 1/4] New API: btrfs_inspect_internal_rootid

From: Hu Tao <hutao(a)cn.fujitsu.com&gt; Signed-off-by: Hu Tao <hutao(a)cn.fujitsu.com&gt; Signed-off-by: Chen Hanxiao <chenhanxiao(a)cn.fujitsu.com&gt; --- daemon/btrfs.c | 38 ++++++++++++++++++++++++++++++++++++++ generator/actions.ml | 15 +++++++++++++++ src/MAX_PROC_NR | 2 +- 3 files changed, 54 insertions(+), 1 deletion(-) diff --git a/daemon/btrfs.c b/daemon/btrfs.c index 6b93973..e1f617d 100644 --- a/daemon/btrfs.c +++ b/daemon/btrfs.c @@ -1929,3 +1929,41 @@ error: free (ret); return NULL; } + +int64_t +do_btrfs_inspect_internal_rootid (const char *path) +{ + const size_t MAX_ARGS = 64; + const char *argv[MAX_ARGS]; + size_t i = 0; + CLEANUP_FREE char *path_buf = NULL; + CLEANUP_FREE char *err = NULL; + CLEANUP_FREE char *out = NULL; + int r; + int64_t ret; + + path_buf = sysroot_path (path); + if (path_buf == NULL) { + reply_with_perror ("malloc"); + return -1; + } + + ADD_ARG (argv, i, str_btrfs); + ADD_ARG (argv, i, "inspect-internal"); + ADD_ARG (argv, i, "rootid"); + ADD_ARG (argv, i, path_buf); + ADD_ARG (argv, i, NULL); + + r = commandv (&out, &err, argv); + if (r == -1) { + reply_with_error ("%s: %s", path, err); + return -1; + } + + if (sscanf (out, "%" SCNi64, &ret) != 1) { + reply_with_error ("%s: could not parse rootid: %s.", argv[0], out); + return -1; + } + + return ret; +} diff --git a/generator/actions.ml b/generator/actions.ml index c995787..be4cc98 100644 --- a/generator/actions.ml +++ b/generator/actions.ml @@ -12475,6 +12475,21 @@ Show the status of a running or paused balance on a btrfs filesystem." }; longdesc = "\ Show status of running or finished scrub on a btrfs filesystem." }; + { defaults with + name = "btrfs_inspect_internal_rootid"; + style = RInt64 "id", [Pathname "path"], []; + proc_nr = Some 450; + optional = Some "btrfs"; camel_name = "BTRFSInspectRootid"; + tests = [ + InitPartition, Always, TestRun ( + [["mkfs_btrfs"; "/dev/sda1"; ""; ""; "NOARG"; ""; "NOARG"; "NOARG"; ""; ""]; + ["mount"; "/dev/sda1"; "/"]; + ["btrfs_inspect_internal_rootid"; "/"]]), []; + ]; + shortdesc = "get tree ID of the containing subvolume of path"; + longdesc = "\ +Get tree ID of the containing subvolume of path." }; + ] (* Non-API meta-commands available only in guestfish. diff --git a/src/MAX_PROC_NR b/src/MAX_PROC_NR index 2b20fd0..29ba0df 100644 --- a/src/MAX_PROC_NR +++ b/src/MAX_PROC_NR @@ -1 +1 @@ -449 +450 -- 2.1.0