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Change gctl_set_param() to return an error instead of setting an

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error on the request.  Add a wrapper, gctl_set_param_err(), that
sets the error on the request from the error returned by
gctl_set_param() and update current callers of gctl_set_param()
to call gctl_set_param_err() instead.
This makes gctl_set_param() much more usable in situations where
the caller knows better what to do with certain (apparent) error
conditions and setting an error on the request is not one of the
things that need to be done.
This commit is contained in:
Marcel Moolenaar 2006-04-07 16:19:48 +00:00
parent cb94ab3088
commit 41063f9380
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=157581
4 changed files with 34 additions and 17 deletions
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3
sys/geom/geom.h
View File

@ -336,7 +336,8 @@ extern struct sx topology_lock;
#endif /* _KERNEL */
/* geom_ctl.c */
void gctl_set_param(struct gctl_req *req, const char *param, void const *ptr, int len);
int gctl_set_param(struct gctl_req *req, const char *param, void const *ptr, int len);
void gctl_set_param_err(struct gctl_req *req, const char *param, void const *ptr, int len);
void *gctl_get_param(struct gctl_req *req, const char *param, int *len);
char const *gctl_get_asciiparam(struct gctl_req *req, const char *param);
void *gctl_get_paraml(struct gctl_req *req, const char *param, int len);

4
sys/geom/geom_bsd.c
View File

@ -635,8 +635,8 @@ g_bsd_config(struct gctl_req *req, struct g_class *mp, char const *verb)
gsp = gp->softc;
ms = gsp->softc;
if (!strcmp(verb, "read mbroffset")) {
gctl_set_param(req, "mbroffset",
&ms->mbroffset, sizeof(ms->mbroffset));
gctl_set_param_err(req, "mbroffset", &ms->mbroffset,
sizeof(ms->mbroffset));
return;
} else if (!strcmp(verb, "write label")) {
label = gctl_get_paraml(req, "label", LABELSIZE);

4
sys/geom/geom_ccd.c
View File

@ -782,7 +782,7 @@ g_ccd_create(struct gctl_req *req, struct g_class *mp)
else
sbuf_printf(sb, "concatenated\n");
sbuf_finish(sb);
gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1);
gctl_set_param_err(req, "output", sbuf_data(sb), sbuf_len(sb) + 1);
sbuf_delete(sb);
}
@ -833,7 +833,7 @@ g_ccd_list(struct gctl_req *req, struct g_class *mp)
sbuf_printf(sb, "\n");
}
sbuf_finish(sb);
gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1);
gctl_set_param_err(req, "output", sbuf_data(sb), sbuf_len(sb) + 1);
sbuf_delete(sb);
}

40
sys/geom/geom_ctl.c
View File

@ -268,8 +268,9 @@ gctl_dump(struct gctl_req *req)
}
}
void
gctl_set_param(struct gctl_req *req, const char *param, void const *ptr, int len)
int
gctl_set_param(struct gctl_req *req, const char *param, void const *ptr,
int len)
{
int i;
struct gctl_req_arg *ap;
@ -278,20 +279,35 @@ gctl_set_param(struct gctl_req *req, const char *param, void const *ptr, int len
ap = &req->arg[i];
if (strcmp(param, ap->name))
continue;
if (!(ap->flag & GCTL_PARAM_WR)) {
gctl_error(req, "No write access %s argument", param);
return;
}
if (!(ap->flag & GCTL_PARAM_WR))
return (EPERM);
ap->flag |= GCTL_PARAM_CHANGED;
if (ap->len < len) {
gctl_error(req, "Wrong length %s argument", param);
return;
bcopy(ptr, ap->kvalue, ap->len);
return (ENOSPC);
}
bcopy(ptr, ap->kvalue, len);
ap->flag |= GCTL_PARAM_CHANGED;
return;
return (0);
}
return (EINVAL);
}
void
gctl_set_param_err(struct gctl_req *req, const char *param, void const *ptr,
int len)
{
switch (gctl_set_param(req, param, ptr, len)) {
case EPERM:
gctl_error(req, "No write access %s argument", param);
break;
case ENOSPC:
gctl_error(req, "Wrong length %s argument", param);
break;
case EINVAL:
gctl_error(req, "Missing %s argument", param);
break;
}
gctl_error(req, "Missing %s argument", param);
return;
}
void *