- Split failure probability configuration into read failure probability and
write failure probability. - Allow to specify an error number to return of failure. MFC after: 3 days
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3a1d9c271b
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6a146a1989
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=162142
@ -1,5 +1,5 @@
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/*-
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* Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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@ -38,7 +38,9 @@ __FBSDID("$FreeBSD$");
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uint32_t lib_version = G_LIB_VERSION;
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uint32_t version = G_NOP_VERSION;
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static intmax_t failprob = 0;
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static intmax_t error = -1;
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static intmax_t rfailprob = -1;
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static intmax_t wfailprob = -1;
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static intmax_t offset = 0;
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static intmax_t secsize = 0;
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static intmax_t size = 0;
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@ -46,20 +48,25 @@ static intmax_t size = 0;
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struct g_command class_commands[] = {
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{ "create", G_FLAG_VERBOSE | G_FLAG_LOADKLD, NULL,
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{
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{ 'f', "failprob", &failprob, G_TYPE_NUMBER },
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{ 'e', "error", &error, G_TYPE_NUMBER },
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{ 'o', "offset", &offset, G_TYPE_NUMBER },
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{ 'r', "rfailprob", &rfailprob, G_TYPE_NUMBER },
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{ 's', "size", &size, G_TYPE_NUMBER },
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{ 'S', "secsize", &secsize, G_TYPE_NUMBER },
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{ 'w', "wfailprob", &wfailprob, G_TYPE_NUMBER },
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G_OPT_SENTINEL
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},
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"[-v] [-f failprob] [-o offset] [-s size] [-S secsize] dev ..."
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"[-v] [-e error] [-o offset] [-r rfailprob] [-s size] [-S secsize] "
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"[-w wfailprob] dev ..."
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},
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{ "configure", G_FLAG_VERBOSE, NULL,
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{
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{ 'f', "failprob", &failprob, G_TYPE_NUMBER },
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{ 'e', "error", &error, G_TYPE_NUMBER },
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{ 'r', "rfailprob", &rfailprob, G_TYPE_NUMBER },
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{ 'w', "wfailprob", &wfailprob, G_TYPE_NUMBER },
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G_OPT_SENTINEL
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},
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"[-v] [-f failprob] prov ..."
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"[-v] [-e error] [-r rfailprob] [-w wfailprob] prov ..."
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},
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{ "destroy", G_FLAG_VERBOSE, NULL,
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{
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@ -1,4 +1,4 @@
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.\" Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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.\" Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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@ -24,7 +24,7 @@
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.\"
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.\" $FreeBSD$
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.\"
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.Dd May 21, 2004
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.Dd September 8, 2006
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.Dt GNOP 8
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.Os
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.Sh NAME
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@ -34,15 +34,19 @@
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.Nm
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.Cm create
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.Op Fl v
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.Op Fl f Ar failprob
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.Op Fl e Ar error
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.Op Fl o Ar offset
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.Op Fl r Ar rfailprob
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.Op Fl s Ar size
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.Op Fl S Ar secsize
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.Op Fl w Ar wfailprob
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.Ar dev ...
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.Nm
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.Cm configure
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.Op Fl v
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.Op Fl f Ar failprob
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.Op Fl e Ar error
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.Op Fl r Ar rfailprob
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.Op Fl w Ar wfailprob
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.Ar prov ...
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.Nm
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.Cm destroy
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@ -104,17 +108,21 @@ See
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.El
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.Pp
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Additional options:
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.Bl -tag -width ".Fl f Ar failprob"
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.Bl -tag -width ".Fl f Ar rfailprob"
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.It Fl e Ar error
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Specifies the error number to return on failure.
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.It Fl f
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Force the removal of the specified provider.
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.It Fl f Ar failprob
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Specifies failure probability in percentage.
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.It Fl o Ar offset
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Where to begin on the original provider.
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.It Fl r Ar rfailprob
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Specifies read failure probability in percent.
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.It Fl s Ar size
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Size of the transparent provider.
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.It Fl S Ar secsize
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Sector size of the transparent provider.
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.It Fl w Ar wfailprob
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Specifies write failure probability in percent.
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.It Fl v
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Be more verbose.
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.El
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@ -1,5 +1,5 @@
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/*-
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* Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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@ -77,6 +77,7 @@ g_nop_start(struct bio *bp)
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struct g_geom *gp;
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struct g_provider *pp;
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struct bio *cbp;
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u_int failprob = 0;
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gp = bp->bio_to->geom;
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sc = gp->softc;
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@ -85,19 +86,21 @@ g_nop_start(struct bio *bp)
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case BIO_READ:
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sc->sc_reads++;
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sc->sc_readbytes += bp->bio_length;
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failprob = sc->sc_rfailprob;
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break;
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case BIO_WRITE:
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sc->sc_writes++;
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sc->sc_wrotebytes += bp->bio_length;
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failprob = sc->sc_wfailprob;
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break;
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}
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if (sc->sc_failprob > 0) {
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if (failprob > 0) {
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u_int rval;
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rval = arc4random() % 100;
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if (rval < sc->sc_failprob) {
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G_NOP_LOGREQ(bp, "Returning EIO.");
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g_io_deliver(bp, EIO);
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if (rval < failprob) {
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G_NOP_LOGREQ(bp, "Returning error=%d.", sc->sc_error);
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g_io_deliver(bp, sc->sc_error);
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return;
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}
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}
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@ -133,7 +136,8 @@ g_nop_access(struct g_provider *pp, int dr, int dw, int de)
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static int
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g_nop_create(struct gctl_req *req, struct g_class *mp, struct g_provider *pp,
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u_int failprob, off_t offset, off_t size, u_int secsize)
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int ioerror, u_int rfailprob, u_int wfailprob, off_t offset, off_t size,
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u_int secsize)
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{
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struct g_nop_softc *sc;
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struct g_geom *gp;
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@ -186,7 +190,9 @@ g_nop_create(struct gctl_req *req, struct g_class *mp, struct g_provider *pp,
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}
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sc = g_malloc(sizeof(*sc), M_WAITOK);
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sc->sc_offset = offset;
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sc->sc_failprob = failprob;
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sc->sc_error = ioerror;
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sc->sc_rfailprob = rfailprob;
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sc->sc_wfailprob = wfailprob;
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sc->sc_reads = 0;
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sc->sc_writes = 0;
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sc->sc_readbytes = 0;
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@ -276,7 +282,7 @@ static void
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g_nop_ctl_create(struct gctl_req *req, struct g_class *mp)
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{
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struct g_provider *pp;
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intmax_t *failprob, *offset, *secsize, *size;
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intmax_t *error, *rfailprob, *wfailprob, *offset, *secsize, *size;
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const char *name;
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char param[16];
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int i, *nargs;
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@ -292,13 +298,27 @@ g_nop_ctl_create(struct gctl_req *req, struct g_class *mp)
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gctl_error(req, "Missing device(s).");
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return;
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}
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failprob = gctl_get_paraml(req, "failprob", sizeof(*failprob));
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if (failprob == NULL) {
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gctl_error(req, "No '%s' argument", "failprob");
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error = gctl_get_paraml(req, "error", sizeof(*error));
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if (error == NULL) {
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gctl_error(req, "No '%s' argument", "error");
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return;
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}
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if (*failprob < 0 || *failprob > 100) {
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gctl_error(req, "Invalid '%s' argument", "failprob");
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rfailprob = gctl_get_paraml(req, "rfailprob", sizeof(*rfailprob));
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if (rfailprob == NULL) {
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gctl_error(req, "No '%s' argument", "rfailprob");
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return;
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}
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if (*rfailprob < -1 || *rfailprob > 100) {
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gctl_error(req, "Invalid '%s' argument", "rfailprob");
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return;
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}
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wfailprob = gctl_get_paraml(req, "wfailprob", sizeof(*wfailprob));
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if (wfailprob == NULL) {
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gctl_error(req, "No '%s' argument", "wfailprob");
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return;
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}
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if (*wfailprob < -1 || *wfailprob > 100) {
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gctl_error(req, "Invalid '%s' argument", "wfailprob");
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return;
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}
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offset = gctl_get_paraml(req, "offset", sizeof(*offset));
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@ -344,8 +364,11 @@ g_nop_ctl_create(struct gctl_req *req, struct g_class *mp)
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gctl_error(req, "Provider %s is invalid.", name);
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return;
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}
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if (g_nop_create(req, mp, pp, (u_int)*failprob, (off_t)*offset,
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(off_t)*size, (u_int)*secsize) != 0) {
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if (g_nop_create(req, mp, pp,
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*error == -1 ? EIO : (int)*error,
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*rfailprob == -1 ? 0 : (u_int)*rfailprob,
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*wfailprob == -1 ? 0 : (u_int)*wfailprob,
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(off_t)*offset, (off_t)*size, (u_int)*secsize) != 0) {
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return;
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}
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}
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@ -356,7 +379,7 @@ g_nop_ctl_configure(struct gctl_req *req, struct g_class *mp)
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{
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struct g_nop_softc *sc;
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struct g_provider *pp;
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intmax_t *failprob;
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intmax_t *error, *rfailprob, *wfailprob;
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const char *name;
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char param[16];
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int i, *nargs;
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@ -372,13 +395,27 @@ g_nop_ctl_configure(struct gctl_req *req, struct g_class *mp)
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gctl_error(req, "Missing device(s).");
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return;
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}
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failprob = gctl_get_paraml(req, "failprob", sizeof(*failprob));
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if (failprob == NULL) {
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gctl_error(req, "No '%s' argument", "failprob");
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error = gctl_get_paraml(req, "error", sizeof(*error));
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if (error == NULL) {
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gctl_error(req, "No '%s' argument", "error");
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return;
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}
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if (*failprob < 0 || *failprob > 100) {
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gctl_error(req, "Invalid '%s' argument", "failprob");
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rfailprob = gctl_get_paraml(req, "rfailprob", sizeof(*rfailprob));
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if (rfailprob == NULL) {
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gctl_error(req, "No '%s' argument", "rfailprob");
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return;
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}
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if (*rfailprob < -1 || *rfailprob > 100) {
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gctl_error(req, "Invalid '%s' argument", "rfailprob");
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return;
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}
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wfailprob = gctl_get_paraml(req, "wfailprob", sizeof(*wfailprob));
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if (wfailprob == NULL) {
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gctl_error(req, "No '%s' argument", "wfailprob");
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return;
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}
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if (*wfailprob < -1 || *wfailprob > 100) {
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gctl_error(req, "Invalid '%s' argument", "wfailprob");
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return;
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}
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@ -398,7 +435,12 @@ g_nop_ctl_configure(struct gctl_req *req, struct g_class *mp)
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return;
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}
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sc = pp->geom->softc;
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sc->sc_failprob = (u_int)*failprob;
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if (*error != -1)
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sc->sc_error = (int)*error;
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if (*rfailprob != -1)
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sc->sc_rfailprob = (u_int)*rfailprob;
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if (*wfailprob != -1)
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sc->sc_wfailprob = (u_int)*wfailprob;
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}
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}
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@ -552,7 +594,11 @@ g_nop_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
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sc = gp->softc;
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sbuf_printf(sb, "%s<Offset>%jd</Offset>\n", indent,
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(intmax_t)sc->sc_offset);
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sbuf_printf(sb, "%s<FailProb>%u</FailProb>\n", indent, sc->sc_failprob);
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sbuf_printf(sb, "%s<ReadFailProb>%u</ReadFailProb>\n", indent,
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sc->sc_rfailprob);
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sbuf_printf(sb, "%s<WriteFailProb>%u</WriteFailProb>\n", indent,
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sc->sc_wfailprob);
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sbuf_printf(sb, "%s<Error>%ju</Error>\n", indent, sc->sc_error);
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sbuf_printf(sb, "%s<Reads>%ju</Reads>\n", indent, sc->sc_reads);
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sbuf_printf(sb, "%s<Writes>%ju</Writes>\n", indent, sc->sc_writes);
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sbuf_printf(sb, "%s<ReadBytes>%ju</ReadBytes>\n", indent,
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@ -1,5 +1,5 @@
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/*-
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* Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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@ -30,7 +30,7 @@
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#define _G_NOP_H_
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#define G_NOP_CLASS_NAME "NOP"
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#define G_NOP_VERSION 3
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#define G_NOP_VERSION 4
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#define G_NOP_SUFFIX ".nop"
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#ifdef _KERNEL
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@ -55,8 +55,10 @@
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} while (0)
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struct g_nop_softc {
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int sc_error;
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off_t sc_offset;
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u_int sc_failprob;
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u_int sc_rfailprob;
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u_int sc_wfailprob;
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uintmax_t sc_reads;
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uintmax_t sc_writes;
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uintmax_t sc_readbytes;
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