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commands: use existing vg/lv name parsing functions

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inside the new lv arg parsing function.

This includes getting the VG name from the env var,
and some added checks on the format of the vg/lv string.
This commit is contained in:
David Teigland 2017-02-15 15:06:52 -06:00
parent 2556498ee1
commit 6a5c9ba349
1 changed files with 29 additions and 16 deletions
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45
tools/toollib.c
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@ -3362,10 +3362,10 @@ static int _get_arg_lvnames(struct cmd_context *cmd,
* came up with its own inconsistent approach.
*
* In this case, when the position arg is a single name, it is treated as an LV
* name (not a VG name). This leaves the VG unknown. So, other option values
* must be searched for a VG name. If one of those option values contains a
* vgname/lvname value, then the VG name is extracted and used for the LV
* position arg.
* name (not a VG name). This leaves the VG unknown. So, other option values,
* or env var, must be searched for a VG name. If one of the option values
* contains a vgname/lvname value, then the VG name is extracted and used for
* the LV position arg. Or, if the env var has the VG name, that is used.
*
* Other option values that are searched for a VG name are:
* --thinpool, --cachepool.
@ -3375,21 +3375,21 @@ static int _get_arg_lvnames(struct cmd_context *cmd,
* . add vg/lv1 to arg_lvnames
*
* command lv1
* . error: no vg name
* . error: no vg name (unless LVM_VG_NAME)
*
* command --option vg/lv1 vg/lv2
* command --option=vg/lv1 vg/lv2
* . verify both vg names match
* . add vg to arg_vgnames
* . add vg/lv2 to arg_lvnames
*
* command --option lv1 lv2
* . error: no vg name
* command --option=lv1 lv2
* . error: no vg name (unless LVM_VG_NAME)
*
* command --option vg/lv1 lv2
* command --option=vg/lv1 lv2
* . add vg to arg_vgnames
* . add vg/lv2 to arg_lvnames
*
* command --option lv1 vg/lv2
* command --option=lv1 vg/lv2
* . add vg to arg_vgnames
* . add vg/lv2 to arg_lvnames
*/
@ -3405,6 +3405,7 @@ static int _get_arg_lvnames_using_options(struct cmd_context *cmd,
const char *pos_vgname = NULL;
const char *opt_vgname = NULL;
const char *pos_lvname = NULL;
const char *env_vgname = NULL;
const char *use_vgname = NULL;
char *tmp_name;
char *split;
@ -3440,9 +3441,12 @@ static int _get_arg_lvnames_using_options(struct cmd_context *cmd,
}
if ((split = strchr(pos_name, '/'))) {
pos_vgname = pos_name;
pos_lvname = split + 1;
*split = '\0';
/*
* This splits pos_name 'x/y' into pos_vgname 'x' and pos_lvname 'y'
* It skips repeated '/', e.g. x//y
* It also checks and fails for extra '/', e.g. x/y/z
*/
pos_vgname = _extract_vgname(cmd, pos_name, &pos_lvname);
} else {
pos_lvname = pos_name;
pos_vgname = NULL;
@ -3453,7 +3457,9 @@ static int _get_arg_lvnames_using_options(struct cmd_context *cmd,
else if (arg_is_set(cmd, cachepool_ARG))
arg_name = arg_str_value(cmd, cachepool_ARG, NULL);
if (!pos_vgname && !arg_name) {
env_vgname = _default_vgname(cmd);
if (!pos_vgname && !arg_name && !env_vgname) {
log_error("Cannot find VG name for LV %s.", pos_lvname);
return ECMD_FAILED;
}
@ -3479,7 +3485,7 @@ static int _get_arg_lvnames_using_options(struct cmd_context *cmd,
opt_vgname = NULL;
}
if (!pos_vgname && !opt_vgname) {
if (!pos_vgname && !opt_vgname && !env_vgname) {
log_error("Cannot find VG name for LV %s.", pos_lvname);
return ECMD_FAILED;
}
@ -3490,7 +3496,14 @@ static int _get_arg_lvnames_using_options(struct cmd_context *cmd,
return ECMD_FAILED;
}
use_vgname = pos_vgname ? pos_vgname : opt_vgname;
if (pos_vgname)
use_vgname = pos_vgname;
else if (opt_vgname)
use_vgname = opt_vgname;
else if (env_vgname)
use_vgname = env_vgname;
else
return_ECMD_FAILED;
if (!str_list_add(cmd->mem, arg_vgnames, dm_pool_strdup(cmd->mem, use_vgname))) {
log_error("strlist allocation failed.");