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lvextend: refresh shared LV using select option

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Using --select 'lvname=LV && vgname=VG' avoids the problem
of the lvchange exit code not distinguishing an actual error
result vs the VG or LV not existing.  (This is in case there
is an odd dlm/gfs2 setup where some nodes are running the dlm
but do not have access to the VG.)
This commit is contained in:
David Teigland 2019-03-22 14:28:02 -05:00
parent 85e68a8333
commit 86b96ede2a
1 changed files with 33 additions and 1 deletions
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34
daemons/lvmlockd/lvmlockd-dlm.c
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@ -781,15 +781,47 @@ int lm_is_running_dlm(void)
int lm_refresh_lv_start_dlm(struct action *act)
{
char path[PATH_MAX];
char command[DLMC_RUN_COMMAND_LEN];
char run_uuid[DLMC_RUN_UUID_LEN];
char *p, *vgname, *lvname;
int rv;
/* split /dev/vgname/lvname into vgname and lvname strings */
strncpy(path, act->path, strlen(act->path));
/* skip past dev */
p = strchr(path + 1, '/');
/* skip past slashes */
while (*p == '/')
p++;
/* start of vgname */
vgname = p;
/* skip past vgname */
while (*p != '/')
p++;
/* terminate vgname */
*p = '\0';
p++;
/* skip past slashes */
while (*p == '/')
p++;
lvname = p;
memset(command, 0, sizeof(command));
memset(run_uuid, 0, sizeof(run_uuid));
/* todo: add --readonly */
snprintf(command, DLMC_RUN_COMMAND_LEN,
"lvm lvchange --refresh --nolocking %s", act->path);
"lvm lvchange --refresh --partial --nolocking --select 'lvname=%s && vgname=%s'",
lvname, vgname);
rv = dlmc_run_start(command, strlen(command), 0,
DLMC_FLAG_RUN_START_NODE_NONE,