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Only grow, but never shrink the disk

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This commit is contained in:
reykfloeter 2019-06-02 11:22:57 +02:00
parent bce8634bf5
commit 0509d8d619
1 changed files with 14 additions and 8 deletions
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22
agent/growdisk.c
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@ -32,6 +32,8 @@
#include "main.h"
#define MEG(_n) ((_n) * DEV_BSIZE / 1024 / 1024)
static uint16_t dkcksum(struct disklabel *);
static uint16_t
@ -115,18 +117,22 @@ growdisk(struct system_config *sc)
bend = DL_GETDSIZE(&lp) - DL_GETBSTART(&lp);
psize = bend - DL_GETPOFFSET(p);
if (sc->sc_dryrun ||
(bend == DL_GETBEND(&lp) && psize == DL_GETPSIZE(p))) {
log_debug("%s: %s%c uses maximum size %llu",
__func__, sc->sc_rootdisk, last_part, psize);
/* Only grow, but never shring the disk */
if (bend <= DL_GETBEND(&lp) && psize <= DL_GETPSIZE(p)) {
log_debug("%s: not growing %s%c, size is %lluMB",
__func__, sc->sc_rootdisk, last_part, MEG(psize));
ret = 0;
} else {
log_info("growing %s%c from %lluMB to %lluMB",
sc->sc_rootdisk, last_part,
MEG(DL_GETPSIZE(p)), MEG(psize));
ret = -1;
}
if (sc->sc_dryrun || ret == 0) {
ret = 0;
goto done;
}
log_debug("%s: growing %s%c from %llu to %llu",
__func__, sc->sc_rootdisk, last_part, DL_GETPSIZE(p), psize);
/* Update OpenBSD boundaries */
DL_SETBEND(&lp, bend);