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geom: Don't re-add duplicate aliases

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Reviewed by:	imp (informal +1; extracted from phab 24968)
This commit is contained in:
Conrad Meyer 2020-06-05 16:05:09 +00:00
parent fc68af7962
commit c726a670df
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=361837
1 changed files with 9 additions and 0 deletions
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9
sys/geom/geom_subr.c
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@ -652,6 +652,15 @@ g_provider_add_alias(struct g_provider *pp, const char *fmt, ...)
sbuf_vprintf(sb, fmt, ap);
va_end(ap);
sbuf_finish(sb);
LIST_FOREACH(gap, &pp->aliases, ga_next) {
if (strcmp(gap->ga_alias, sbuf_data(sb)) != 0)
continue;
/* Don't re-add the same alias. */
sbuf_delete(sb);
return;
}
gap = g_malloc(sizeof(*gap) + sbuf_len(sb) + 1, M_WAITOK | M_ZERO);
memcpy((char *)(gap + 1), sbuf_data(sb), sbuf_len(sb));
sbuf_delete(sb);