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Accept raidz and mirror with similar redundancy

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Allow a pool to be created with both raidz and mirror members,
without giving -f, as long as they have matching redundancy.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Haakan T Johansson <f96hajo@chalmers.se>
Closes #5915
This commit is contained in:
Håkan Johansson 2017-04-06 00:21:13 +02:00 committed by Brian Behlendorf
parent 177c91d06e
commit 6ba1ce9ee9
1 changed files with 43 additions and 1 deletions
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44
cmd/zpool/zpool_vdev.c
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@ -774,6 +774,19 @@ typedef struct replication_level {
#define ZPOOL_FUZZ (16 * 1024 * 1024)
static boolean_t
is_raidz_mirror(replication_level_t *a, replication_level_t *b,
replication_level_t **raidz, replication_level_t **mirror)
{
if (strcmp(a->zprl_type, "raidz") == 0 &&
strcmp(b->zprl_type, "mirror") == 0) {
*raidz = a;
*mirror = b;
return (B_TRUE);
}
return (B_FALSE);
}
/*
* Given a list of toplevel vdevs, return the current replication level. If
* the config is inconsistent, then NULL is returned. If 'fatal' is set, then
@ -791,6 +804,7 @@ get_replication(nvlist_t *nvroot, boolean_t fatal)
replication_level_t lastrep = {0};
replication_level_t rep;
replication_level_t *ret;
replication_level_t *raidz, *mirror;
boolean_t dontreport;
ret = safe_malloc(sizeof (replication_level_t));
@ -973,7 +987,35 @@ get_replication(nvlist_t *nvroot, boolean_t fatal)
* different.
*/
if (lastrep.zprl_type != NULL) {
if (strcmp(lastrep.zprl_type, rep.zprl_type) != 0) {
if (is_raidz_mirror(&lastrep, &rep, &raidz, &mirror) ||
is_raidz_mirror(&rep, &lastrep, &raidz, &mirror)) {
/*
* Accepted raidz and mirror when they can
* handle the same number of disk failures.
*/
if (raidz->zprl_parity !=
mirror->zprl_children - 1) {
if (ret != NULL)
free(ret);
ret = NULL;
if (fatal)
vdev_error(gettext(
"mismatched replication "
"level: "
"%s and %s vdevs with "
"different redundancy, "
"%llu vs. %llu (%llu-way) "
"are present\n"),
raidz->zprl_type,
mirror->zprl_type,
raidz->zprl_parity,
mirror->zprl_children - 1,
mirror->zprl_children);
else
return (NULL);
}
} else if (strcmp(lastrep.zprl_type, rep.zprl_type) !=
0) {
if (ret != NULL)
free(ret);
ret = NULL;