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lvconvert: Rearrange code that decides segtype.

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This commit is contained in:
Alasdair G Kergon 2016-07-30 00:22:13 +01:00
parent a8e4790810
commit d01b1b6cc1
2 changed files with 39 additions and 53 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.163 -
=================================
Further lvconvert validation logic refactoring.
Version 2.02.162 - 28th July 2016
=================================

91
tools/lvconvert.c
View File

@ -155,9 +155,9 @@ static int _lvconvert_name_params(struct lvconvert_params *lp,
}
if (!strstr((*pargv)[0], "_rimage_")) { /* Snapshot */
if (!(lp->segtype = get_segtype_from_string(cmd, SEG_TYPE_NAME_SNAPSHOT)))
return_0;
lp->type_str = SEG_TYPE_NAME_SNAPSHOT;
lp->merge_snapshot = 1;
return 1;
}
@ -702,10 +702,6 @@ static int _read_params(struct cmd_context *cmd, int argc, char **argv,
log_verbose("Setting chunk size to %s.", display_size(cmd, lp->chunk_size));
lp->type_str = SEG_TYPE_NAME_SNAPSHOT;
if (!(lp->segtype = get_segtype_from_string(cmd, lp->type_str)))
return_0;
lp->zero = (lp->segtype->flags & SEG_CANNOT_BE_ZEROED) ? 0 : arg_int_value(cmd, zero_ARG, 1);
} else if (lp->replace) { /* RAID device replacement */
lp->replace_pv_count = arg_count(cmd, replace_ARG);
@ -784,36 +780,27 @@ static int _read_params(struct cmd_context *cmd, int argc, char **argv,
/* down-converting to linear/stripe? */
lp->type_str = SEG_TYPE_NAME_STRIPED;
if (*lp->type_str)
/* changing mirror type? */
if (!(lp->segtype = get_segtype_from_string(cmd, lp->type_str)))
return_0;
/* Default is never striped, regardless of existing LV configuration. */
if (!get_stripe_params(cmd, &lp->stripes, &lp->stripe_size))
return_0;
} else if (_raid0_type_requested(lp->type_str) || _striped_type_requested(lp->type_str)) { /* striped or linear or raid0 */
if (arg_from_list_is_set(cmd, "cannot be used with --type raid0 or --type striped or --type linear",
chunksize_ARG, corelog_ARG, mirrors_ARG, mirrorlog_ARG, regionsize_ARG, zero_ARG,
-1))
return_0;
if (!(lp->segtype = get_segtype_from_string(cmd, lp->type_str)))
return_0;
if (!get_stripe_params(cmd, &lp->stripes, &lp->stripe_size))
return_0;
/* FIXME Shouldn't need to override get_stripe_params which defaults to 1 stripe (i.e. linear)! */
/* The default keeps existing number of stripes, handled inside the library code */
if (!arg_is_set(cmd, stripes_long_ARG) && !_linear_type_requested(lp->type_str))
lp->stripes = 0;
} /* else segtype will default to current type */
lp->force = arg_count(cmd, force_ARG);
lp->yes = arg_count(cmd, yes_ARG);
if (!_lvconvert_name_params(lp, cmd, &argc, &argv))
return_0;
lp->pv_count = argc;
lp->pvs = argv;
/* If we have type_str, set up the segtype to match. */
if (*lp->type_str && !(lp->segtype = get_segtype_from_string(cmd, lp->type_str)))
return_0;
if (activation() && lp->segtype && lp->segtype->ops->target_present &&
!lp->segtype->ops->target_present(cmd, NULL, &lp->target_attr)) {
log_error("%s: Required device-mapper target(s) not "
@ -821,11 +808,23 @@ static int _read_params(struct cmd_context *cmd, int argc, char **argv,
return 0;
}
if (!_lvconvert_name_params(lp, cmd, &argc, &argv))
return_0;
/* Process striping parameters */
/* FIXME This is incomplete */
if (_mirror_or_raid_type_requested(cmd, lp->type_str) || _raid0_type_requested(lp->type_str) ||
_striped_type_requested(lp->type_str) || lp->repair || lp->mirrorlog || lp->corelog) {
if (!get_stripe_params(cmd, &lp->stripes, &lp->stripe_size))
return_0;
lp->pv_count = argc;
lp->pvs = argv;
if (_raid0_type_requested(lp->type_str) || _striped_type_requested(lp->type_str))
/* FIXME Shouldn't need to override get_stripe_params which defaults to 1 stripe (i.e. linear)! */
/* The default keeps existing number of stripes, handled inside the library code */
if (!arg_is_set(cmd, stripes_long_ARG) && !_linear_type_requested(lp->type_str))
lp->stripes = 0;
}
if (lp->snapshot)
lp->zero = (lp->segtype->flags & SEG_CANNOT_BE_ZEROED) ? 0 : arg_int_value(cmd, zero_ARG, 1);
return 1;
}
@ -1848,9 +1847,6 @@ static int _lvconvert_raid(struct logical_volume *lv, struct lvconvert_params *l
struct lv_segment *seg = first_seg(lv);
dm_percent_t sync_percent;
if (!lp->segtype)
lp->segtype = seg->segtype;
if (_linear_type_requested(lp->type_str)) {
if (arg_is_set(cmd, mirrors_ARG) && (arg_uint_value(cmd, mirrors_ARG, 0) != 0)) {
log_error("Cannot specify mirrors with linear type.");
@ -4169,11 +4165,6 @@ static int _convert_cache_pool(struct cmd_context *cmd, struct logical_volume *l
static int _convert_mirror(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
const struct segment_type *new_segtype = NULL;
if (*lp->type_str)
new_segtype = get_segtype_from_string(cmd, lp->type_str);
if (arg_is_set(cmd, mirrors_ARG))
return _convert_mirror_number(cmd, lv, lp);
@ -4189,7 +4180,7 @@ static int _convert_mirror(struct cmd_context *cmd, struct logical_volume *lv,
if (_linear_type_requested(lp->type_str))
return _convert_mirror_linear(cmd, lv, lp);
if (new_segtype && segtype_is_raid(new_segtype))
if (segtype_is_raid(lp->segtype))
return _convert_mirror_raid(cmd, lv, lp);
/*
@ -4224,11 +4215,6 @@ static int _convert_mirror(struct cmd_context *cmd, struct logical_volume *lv,
static int _convert_raid(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
const struct segment_type *new_segtype = NULL;
if (*lp->type_str)
new_segtype = get_segtype_from_string(cmd, lp->type_str);
if (arg_is_set(cmd, mirrors_ARG))
return _convert_raid_number(cmd, lv, lp);
@ -4263,7 +4249,7 @@ static int _convert_raid(struct cmd_context *cmd, struct logical_volume *lv,
if (!strcmp(lp->type_str, SEG_TYPE_NAME_CACHE_POOL) || arg_is_set(cmd, cachepool_ARG))
return _convert_raid_cache_pool(cmd, lv, lp);
if (new_segtype && segtype_is_raid(new_segtype))
if (segtype_is_raid(lp->segtype))
return _convert_raid_raid(cmd, lv, lp);
if (!strcmp(lp->type_str, SEG_TYPE_NAME_STRIPED))
@ -4295,12 +4281,8 @@ static int _convert_raid(struct cmd_context *cmd, struct logical_volume *lv,
static int _convert_striped(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
const struct segment_type *new_segtype = NULL;
const char *mirrors_type = find_config_tree_str(cmd, global_mirror_segtype_default_CFG, NULL);
if (*lp->type_str)
new_segtype = get_segtype_from_string(cmd, lp->type_str);
/* FIXME: add --merge-mirror to make this distinct from --merge-snapshot. */
if (arg_is_set(cmd, merge_ARG))
return _convert_striped_merge(cmd, lv, lp);
@ -4327,7 +4309,7 @@ static int _convert_striped(struct cmd_context *cmd, struct logical_volume *lv,
if (!strcmp(lp->type_str, SEG_TYPE_NAME_MIRROR))
return _convert_striped_mirror(cmd, lv, lp);
if (new_segtype && segtype_is_raid(new_segtype))
if (segtype_is_raid(lp->segtype))
return _convert_striped_raid(cmd, lv, lp);
/* --mirrors can mean --type mirror or --type raid1 depending on config setting. */
@ -4369,7 +4351,7 @@ static int _convert_striped(struct cmd_context *cmd, struct logical_volume *lv,
static int _lvconvert(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
struct lv_segment *lv_seg = first_seg(lv);
struct lv_segment *seg = first_seg(lv);
int ret = 0;
/*
@ -4407,11 +4389,14 @@ static int _lvconvert(struct cmd_context *cmd, struct logical_volume *lv,
}
}
/* If we don't have a specific new segtype to use, keep the existing one. */
if (!lp->segtype)
lp->segtype = seg->segtype;
/*
* Each LV type that can be converted.
* (The existing type of the LV, not a requested type.)
*/
if (lv_is_cow(lv)) {
ret = _convert_cow_snapshot(cmd, lv, lp);
goto out;
@ -4449,10 +4434,10 @@ static int _lvconvert(struct cmd_context *cmd, struct logical_volume *lv,
/*
* FIXME: add lv_is_striped() and lv_is_linear()?
* This does not include raid0.
* This does not include raid0 which is caught by the test above.
* If operations differ between striped and linear, split this case.
*/
if (segtype_is_striped(lv_seg->segtype) || segtype_is_linear(lv_seg->segtype)) {
if (segtype_is_striped(seg->segtype) || segtype_is_linear(seg->segtype)) {
ret = _convert_striped(cmd, lv, lp);
goto out;
}