[Libguestfs] [PATCH v3 06/11] New API: btrfs_qgroup_limit

btrfs_qgroup_limit limits the size of a qgroup. Signed-off-by: Hu Tao <hutao(a)cn.fujitsu.com&gt; --- daemon/btrfs.c | 35 +++++++++++++++++++++++++++++++++++ generator/actions.ml | 22 ++++++++++++++++++++++ src/MAX_PROC_NR | 2 +- 3 files changed, 58 insertions(+), 1 deletion(-) diff --git a/daemon/btrfs.c b/daemon/btrfs.c index 71229f1..01fd0cf 100644 --- a/daemon/btrfs.c +++ b/daemon/btrfs.c @@ -1084,3 +1084,38 @@ error: return -1; return r; } + +int +do_btrfs_qgroup_limit (const char *subvolume, int64_t size) +{ + 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; + char size_str[32]; + 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, "limit"); + snprintf (size_str, sizeof size_str, "%" PRIi64, size); + ADD_ARG (argv, i, size_str); + 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; +} diff --git a/generator/actions.ml b/generator/actions.ml index 3e5aab0..6352851 100644 --- a/generator/actions.ml +++ b/generator/actions.ml @@ -12118,6 +12118,28 @@ Enable or disable subvolume quota support for filesystem which contains C<path>. longdesc = "\ Trash all qgroup numbers and scan the metadata again with the current config." }; + { defaults with + name = "btrfs_qgroup_limit"; + style = RErr, [Pathname "subvolume"; Int64 "size"], []; + proc_nr = Some 429; + optional = Some "btrfs"; camel_name = "BTRFSQgroupLimit"; + tests = [ + InitPartition, Always, TestRun ( + [["mkfs_btrfs"; "/dev/sda1"; ""; ""; "NOARG"; ""; "NOARG"; "NOARG"; ""; ""]; + ["mount"; "/dev/sda1"; "/"]; + ["btrfs_quota_enable"; "/"; "true"]; + ["btrfs_qgroup_limit"; "/"; "10737418240"]]), []; + InitPartition, Always, TestLastFail ( + [["mkfs_btrfs"; "/dev/sda1"; ""; ""; "NOARG"; ""; "NOARG"; "NOARG"; ""; ""]; + ["mount"; "/dev/sda1"; "/"]; + ["btrfs_quota_enable"; "/"; "false"]; + ["btrfs_qgroup_limit"; "/"; "10737418240"]]), []; + ]; + shortdesc = "limit the size of a subvolume"; + longdesc = "\ +Limit the size of a subvolume which's path is C<subvolume>. C<size> +can have suffix of G, M, or K. " }; + ] (* Non-API meta-commands available only in guestfish. diff --git a/src/MAX_PROC_NR b/src/MAX_PROC_NR index 43d371a..3560666 100644 --- a/src/MAX_PROC_NR +++ b/src/MAX_PROC_NR @@ -1 +1 @@ -428 +429 -- 1.9.3