Author: cem Date: Mon Apr 22 03:25:49 2019 New Revision: 346516 URL: https://svnweb.freebsd.org/changeset/base/346516
Log: gnop(8): Nopify configuration as a kernel dump device As a dummy / no-op dump device, to facilitate dumpon(8) testing. Reviewed by: markj (earlier version) Differential Revision: https://reviews.freebsd.org/D19991 Modified: head/sys/geom/nop/g_nop.c Modified: head/sys/geom/nop/g_nop.c ============================================================================== --- head/sys/geom/nop/g_nop.c Mon Apr 22 03:19:40 2019 (r346515) +++ head/sys/geom/nop/g_nop.c Mon Apr 22 03:25:49 2019 (r346516) @@ -97,7 +97,43 @@ g_nop_resize(struct g_consumer *cp) g_resize_provider(pp, size); } +static int +g_nop_dumper(void *priv, void *virtual, vm_offset_t physical, off_t offset, + size_t length) +{ + return (0); +} + static void +g_nop_kerneldump(struct bio *bp, struct g_nop_softc *sc) +{ + struct g_kerneldump *gkd; + struct g_geom *gp; + struct g_provider *pp; + + gkd = (struct g_kerneldump *)bp->bio_data; + gp = bp->bio_to->geom; + g_trace(G_T_TOPOLOGY, "%s(%s, %jd, %jd)", __func__, gp->name, + (intmax_t)gkd->offset, (intmax_t)gkd->length); + + pp = LIST_FIRST(&gp->provider); + + gkd->di.dumper = g_nop_dumper; + gkd->di.priv = sc; + gkd->di.blocksize = pp->sectorsize; + gkd->di.maxiosize = DFLTPHYS; + gkd->di.mediaoffset = sc->sc_offset + gkd->offset; + if (gkd->offset > sc->sc_explicitsize) { + g_io_deliver(bp, ENODEV); + return; + } + if (gkd->offset + gkd->length > sc->sc_explicitsize) + gkd->length = sc->sc_explicitsize - gkd->offset; + gkd->di.mediasize = gkd->length; + g_io_deliver(bp, 0); +} + +static void g_nop_start(struct bio *bp) { struct g_nop_softc *sc; @@ -127,11 +163,18 @@ g_nop_start(struct bio *bp) case BIO_GETATTR: sc->sc_getattrs++; if (sc->sc_physpath && - g_handleattr_str(bp, "GEOM::physpath", sc->sc_physpath)) { - mtx_unlock(&sc->sc_lock); - return; - } - break; + g_handleattr_str(bp, "GEOM::physpath", sc->sc_physpath)) + ; + else if (strcmp(bp->bio_attribute, "GEOM::kerneldump") == 0) + g_nop_kerneldump(bp, sc); + else + /* + * Fallthrough to forwarding the GETATTR down to the + * lower level device. + */ + break; + mtx_unlock(&sc->sc_lock); + return; case BIO_FLUSH: sc->sc_flushes++; break; _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
