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DDF: get_svd_state: Status logic for secondary RAID level 

Implement logic to derive the status of a secondary RAID
from its members. Use it in ddf_set_disk.

Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
mwilck@arcor.de 2013-07-03 22:27:49 +02:00 committed by NeilBrown
parent 5ec636b7ad
commit 0777d17d58
1 changed files with 33 additions and 4 deletions
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37
super-ddf.c
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@ -3861,6 +3861,38 @@ static int get_bvd_state(const struct ddf_super *ddf,
return state;
}
static int secondary_state(int state, int other, int seclevel)
{
if (state == DDF_state_optimal && other == DDF_state_optimal)
return DDF_state_optimal;
if (seclevel == DDF_2MIRRORED) {
if (state == DDF_state_optimal || other == DDF_state_optimal)
return DDF_state_part_optimal;
if (state == DDF_state_failed && other == DDF_state_failed)
return DDF_state_failed;
return DDF_state_degraded;
} else {
if (state == DDF_state_failed || other == DDF_state_failed)
return DDF_state_failed;
if (state == DDF_state_degraded || other == DDF_state_degraded)
return DDF_state_degraded;
return DDF_state_part_optimal;
}
}
static int get_svd_state(const struct ddf_super *ddf, const struct vcl *vcl)
{
int state = get_bvd_state(ddf, &vcl->conf);
unsigned int i;
for (i = 1; i < vcl->conf.sec_elmnt_count; i++) {
state = secondary_state(
state,
get_bvd_state(ddf, vcl->other_bvds[i-1]),
vcl->conf.srl);
}
return state;
}
/*
* The state of each disk is stored in the global phys_disk structure
* in phys_disk.entries[n].state.
@ -3946,10 +3978,7 @@ static void ddf_set_disk(struct active_array *a, int n, int state)
* It needs to be one of "optimal", "degraded", "failed".
* I don't understand 'deleted' or 'missing'.
*/
state = get_bvd_state(ddf, vc);
if (vc->sec_elmnt_count > 1) {
/* treat secondary level */
}
state = get_svd_state(ddf, vcl);
if (ddf->virt->entries[inst].state !=
((ddf->virt->entries[inst].state & ~DDF_state_mask)