master - pool: drop create spare on error path

[Zdenek Kabelac]

Gitweb:        https://sourceware.org/git/?p=lvm2.git;a=commitdiff;h=90ee7783b4c2b1b13122e6...
Commit:        90ee7783b4c2b1b13122e6107cebeb28ca30326d
Parent:        52fd66210b120bf1185fbbc91b6bc487d99dd33a
Author:        Zdenek Kabelac 
AuthorDate:    Sat Oct 28 00:10:16 2017 +0200
Committer:     Zdenek Kabelac 
CommitterDate: Mon Oct 30 11:53:39 2017 +0100

pool: drop create spare on error path

When thin/cache pool creation fails and command created _pmspare,
such volume is now removed on error path.
---
 WHATS_NEW        |    1 +
 tools/lvcreate.c |    7 +++++++
 2 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/WHATS_NEW b/WHATS_NEW
index 4d1a6a8..961c7e5 100644
--- a/WHATS_NEW
+++ b/WHATS_NEW
@@ -1,5 +1,6 @@
 Version 2.02.176 -
 ===================================
+  Remove created spare LV when creation of thin-pool failed.
   Avoid reading ignored metadata when mda gets used again.
   Fix detection of moved PVs in vgsplit. (2.02.175)
   Ignore --stripes/--stripesize on RAID takeover
diff --git a/tools/lvcreate.c b/tools/lvcreate.c
index 09bbe10..7f86a37 100644
--- a/tools/lvcreate.c
+++ b/tools/lvcreate.c
@@ -1579,6 +1579,7 @@ static int _lvcreate_single(struct cmd_context *cmd, const char *vg_name,
    struct processing_params *pp = (struct processing_params *) handle->custom_handle;
    struct lvcreate_params *lp = pp->lp;
    struct lvcreate_cmdline_params *lcp = pp->lcp;
+	struct logical_volume *spare = vg->pool_metadata_spare_lv;
    int ret = ECMD_FAILED;

if (!_read_activation_params(cmd, vg, lp))
@@ -1652,6 +1653,12 @@ static int _lvcreate_single(struct cmd_context *cmd, const char *vg_name,

ret = ECMD_PROCESSED;
 out:
+	if (ret != ECMD_PROCESSED && !spare && vg->pool_metadata_spare_lv)
+		/* Remove created spare volume for failed pool creation */
+		if (!lvremove_single(cmd, vg->pool_metadata_spare_lv, NULL))
+			log_error("Removal of created spare volume failed. "
+				  "Manual intervention required.");
+
    return ret;
 }