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Restore backward compatibility for "attach" verb.

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In r332361 and r333439, two new parameters were added to geli attach
verb using gctl_get_paraml, which requires the value to be present.
This would prevent old geli(8) binary from attaching geli(4) device
as they have no knowledge about the new parameters.

Restore backward compatibility by treating the absense of these two
values as seeing the default value supplied by userland.

PR:		232595
Reviewed by:	oshogbo
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D17680
This commit is contained in:
Xin LI 2018-10-27 03:37:14 +00:00
parent 48f0136d52
commit 0db665bb98
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=339804
1 changed files with 17 additions and 12 deletions
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29
sys/geom/eli/g_eli_ctl.c
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@ -59,8 +59,8 @@ g_eli_ctl_attach(struct gctl_req *req, struct g_class *mp)
struct g_provider *pp;
const char *name;
u_char *key, mkey[G_ELI_DATAIVKEYLEN];
int *nargs, *detach, *readonly, *dryrun;
int keysize, error, nkey;
int *nargs, *detach, *readonly, *dryrunp;
int keysize, error, nkey, dryrun, dummy;
intmax_t *valp;
g_topology_assert();
@ -81,12 +81,14 @@ g_eli_ctl_attach(struct gctl_req *req, struct g_class *mp)
return;
}
valp = gctl_get_paraml(req, "keyno", sizeof(*valp));
if (valp == NULL) {
gctl_error(req, "No '%s' argument.", "keyno");
return;
/* "keyno" is optional for backward compatibility */
nkey = -1;
valp = gctl_get_param(req, "keyno", &dummy);
if (valp != NULL) {
valp = gctl_get_paraml(req, "keyno", sizeof(*valp));
if (valp != NULL)
nkey = *valp;
}
nkey = *valp;
if (nkey < -1 || nkey >= G_ELI_MAXMKEYS) {
gctl_error(req, "Invalid '%s' argument.", "keyno");
return;
@ -98,10 +100,13 @@ g_eli_ctl_attach(struct gctl_req *req, struct g_class *mp)
return;
}
dryrun = gctl_get_paraml(req, "dryrun", sizeof(*dryrun));
if (dryrun == NULL) {
gctl_error(req, "No '%s' argument.", "dryrun");
return;
/* "dryrun" is optional for backward compatibility */
dryrun = 0;
dryrunp = gctl_get_param(req, "dryrun", &dummy);
if (dryrunp != NULL) {
dryrunp = gctl_get_paraml(req, "dryrun", sizeof(*dryrunp));
if (dryrunp != NULL)
dryrun = *dryrunp;
}
if (*detach && *readonly) {
@ -161,7 +166,7 @@ g_eli_ctl_attach(struct gctl_req *req, struct g_class *mp)
md.md_flags |= G_ELI_FLAG_WO_DETACH;
if (*readonly)
md.md_flags |= G_ELI_FLAG_RO;
if (!*dryrun)
if (!dryrun)
g_eli_create(req, mp, pp, &md, mkey, nkey);
explicit_bzero(mkey, sizeof(mkey));
explicit_bzero(&md, sizeof(md));