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Introduce the convenience function g_getattr() and make it DWIM.

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Sponsored by: DARPA & NAI Labs.
This commit is contained in:
Poul-Henning Kamp 2002-04-09 15:13:42 +00:00
parent 0d3f37a804
commit a4ef1c5f92
2 changed files with 15 additions and 0 deletions
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2
sys/geom/geom.h
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@ -193,6 +193,8 @@ void g_destroy_geom(struct g_geom *pp);
void g_destroy_provider(struct g_provider *pp);
void g_dettach(struct g_consumer *cp);
void g_error_provider(struct g_provider *pp, int error);
int g_getattr__(const char *attr, struct g_consumer *cp, void *var, int len);
#define g_getattr(a, c, v) g_getattr__((a), (c), (v), sizeof *(v))
int g_haveattr(struct bio *bp, char *attribute, void *val, int len);
int g_haveattr_int(struct bio *bp, char *attribute, int val);
int g_haveattr_off_t(struct bio *bp, char *attribute, off_t val);

13
sys/geom/geom_subr.c
View File

@ -640,3 +640,16 @@ g_insert_geom(char *class, struct g_consumer *cp)
return (gp);
}
int
g_getattr__(const char *attr, struct g_consumer *cp, void *var, int len)
{
int error, i;
i = len;
error = g_io_getattr(attr, cp, &i, var);
if (error)
return (error);
if (i != len)
return (EINVAL);
return (0);
}