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toollib: improve stripes args reading

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Rewrite validation of stripes and stripe_size args into more readable
sequential code.

Extend reading of stripes & stripes_size args so it better knows
defaults for types like striped raid.

TODO: this should really be a value obtained for segtype structure and
all the weird conditions and modification of stripes and stripe_size
around lvm2 code should be dropped.
This commit is contained in:
Zdenek Kabelac 2017-11-27 10:26:35 +01:00
parent f70404addb
commit 34eb082bbc
2 changed files with 40 additions and 27 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.177 -
====================================
Enhance reading and validation of options stripes and stripes_size.
Fix printing of default stripe size when user is not using stripes.
Activation code for pvmove automatically discovers holding LVs for resume.
Make a pvmove LV locking holder.

64
tools/toollib.c
View File

@ -1266,39 +1266,41 @@ int get_pool_params(struct cmd_context *cmd,
static int _validate_stripe_params(struct cmd_context *cmd, const struct segment_type *segtype,
uint32_t *stripes, uint32_t *stripe_size)
{
int stripe_size_required = segtype_supports_stripe_size(segtype);
if (*stripes < 1 || *stripes > MAX_STRIPES) {
log_error("Number of stripes (%d) must be between %d and %d.",
*stripes, 1, MAX_STRIPES);
return 0;
}
if (!stripe_size_required && *stripe_size) {
log_print_unless_silent("Ignoring stripesize argument for %s devices.", segtype->name);
if (!segtype_supports_stripe_size(segtype)) {
if (*stripe_size) {
log_print_unless_silent("Ignoring stripesize argument for %s devices.",
segtype->name);
*stripe_size = 0;
} else if (*stripes == 1 && stripe_size_required) {
stripe_size_required = 0;
}
} else if (*stripes == 1) {
if (*stripe_size) {
log_print_unless_silent("Ignoring stripesize argument with single stripe.");
*stripe_size = 0;
}
}
if (stripe_size_required) {
} else {
if (!*stripe_size) {
*stripe_size = find_config_tree_int(cmd, metadata_stripesize_CFG, NULL) * 2;
log_print_unless_silent("Using default stripesize %s.",
display_size(cmd, (uint64_t) *stripe_size));
}
if (*stripe_size < STRIPE_SIZE_MIN || !is_power_of_2(*stripe_size)) {
if (*stripe_size > STRIPE_SIZE_LIMIT * 2) {
log_error("Stripe size cannot be larger than %s.",
display_size(cmd, (uint64_t) STRIPE_SIZE_LIMIT));
return 0;
} else if (*stripe_size < STRIPE_SIZE_MIN || !is_power_of_2(*stripe_size)) {
log_error("Invalid stripe size %s.",
display_size(cmd, (uint64_t) *stripe_size));
return 0;
}
}
if (*stripes < 1 || *stripes > MAX_STRIPES) {
log_error("Number of stripes (%d) must be between %d and %d.",
*stripes, 1, MAX_STRIPES);
return 0;
}
return 1;
}
@ -1314,23 +1316,33 @@ int get_stripe_params(struct cmd_context *cmd, const struct segment_type *segtyp
{
/* stripes_long_ARG takes precedence (for lvconvert) */
/* FIXME Cope with relative +/- changes for lvconvert. */
*stripes = arg_uint_value(cmd, arg_is_set(cmd, stripes_long_ARG) ? stripes_long_ARG : stripes_ARG, 1);
*stripes_supplied = arg_is_set(cmd, stripes_long_ARG) ? : arg_is_set(cmd, stripes_ARG);
if (arg_is_set(cmd, stripes_long_ARG)) {
*stripes = arg_uint_value(cmd, stripes_long_ARG, 0);
*stripes_supplied = 1;
} else if (arg_is_set(cmd, stripes_ARG)) {
*stripes = arg_uint_value(cmd, stripes_ARG, 0);
*stripes_supplied = 1;
} else {
/*
* FIXME add segtype parameter for min_stripes and remove logic for this
* from all other places
*/
if (segtype_is_any_raid6(segtype))
*stripes = 3;
else if (segtype_is_striped_raid(segtype))
*stripes = 2;
else
*stripes = 1;
*stripes_supplied = 0;
}
*stripe_size = arg_uint_value(cmd, stripesize_ARG, 0);
*stripe_size_supplied = arg_is_set(cmd, stripesize_ARG);
if (*stripe_size) {
if ((*stripe_size = arg_uint_value(cmd, stripesize_ARG, 0))) {
if (arg_sign_value(cmd, stripesize_ARG, SIGN_NONE) == SIGN_MINUS) {
log_error("Negative stripesize is invalid.");
return 0;
}
if (arg_uint64_value(cmd, stripesize_ARG, 0) > STRIPE_SIZE_LIMIT * 2) {
log_error("Stripe size cannot be larger than %s.",
display_size(cmd, (uint64_t) STRIPE_SIZE_LIMIT));
return 0;
}
}
*stripe_size_supplied = arg_is_set(cmd, stripesize_ARG);
return _validate_stripe_params(cmd, segtype, stripes, stripe_size);
}