Re: [libvirt] [PATCH] Adds the missing vol-pool command to virsh.

Hi all,

This patch adds a "vol-pool" command to virsh, to round out the conversion functions for vols in virsh. At the moment, if we start with a volume name and a pool id, we're all good. We can convert from that pair to either a volume key or volume path.

But, if we're given just a volume key or path we have no good way to look up the storage pool for it. Kind of makes it a one way association. :/ This patch fixes that, making it possible to work from just having a volume key or path. :) Regards and best wishes, Justin Clift --- tools/virsh.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 48 insertions(+), 0 deletions(-)

diff --git a/tools/virsh.c b/tools/virsh.c index 1279f41..95aea0f 100644 --- a/tools/virsh.c +++ b/tools/virsh.c @@ -5975,6 +5975,53 @@ cmdVolName(vshControl *ctl, const vshCmd *cmd) } +/* + * "vol-pool" command + */ +static const vshCmdInfo info_vol_pool[] = { + {"help", N_("returns the storage pool for a given volume key or path")}, + {"desc", ""}, + {NULL, NULL} +}; + +static const vshCmdOptDef opts_vol_pool[] = { + {"vol", VSH_OT_DATA, VSH_OFLAG_REQ, N_("volume key or path")}, + {NULL, 0, 0, NULL} +}; + +static int +cmdVolPool(vshControl *ctl, const vshCmd *cmd) +{ + virStoragePoolPtr pool; + virStorageVolPtr vol; + + // Check the connection to libvirtd daemon is still working

+ if (!vshConnectionUsability(ctl, ctl->conn, TRUE)) + return FALSE; + + // Use the supplied string to locate the volume + if (!(vol = vshCommandOptVolBy(ctl, cmd, "vol", "pool", NULL, + VSH_BYUUID))) { + return FALSE; + } + + // Look up the parent storage pool for the volume + pool = virStoragePoolLookupByVolume(vol); + if (pool == NULL) { + vshError(ctl, "%s", _("failed to get parent pool")); + virStorageVolFree(vol); + return FALSE; + } + + // Return the name of the parent storage pool + vshPrint(ctl, "%s\n", virStoragePoolGetName(pool)); + + // Cleanup + virStorageVolFree(vol); + virStoragePoolFree(pool); + return TRUE; +} + /* * "vol-key" command @@ -8837,6 +8884,7 @@ static const vshCmdDef commands[] = { {"vol-dumpxml", cmdVolDumpXML, opts_vol_dumpxml, info_vol_dumpxml}, {"vol-info", cmdVolInfo, opts_vol_info, info_vol_info}, {"vol-list", cmdVolList, opts_vol_list, info_vol_list}, + {"vol-pool", cmdVolPool, opts_vol_pool, info_vol_pool}, {"vol-path", cmdVolPath, opts_vol_path, info_vol_path}, {"vol-name", cmdVolName, opts_vol_name, info_vol_name}, {"vol-key", cmdVolKey, opts_vol_key, info_vol_key},