1279 lines
29 KiB
C
1279 lines
29 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright (c) 2004, 2007 Lukas Ertl
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* Copyright (c) 2007, 2009 Ulf Lilleengen
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* Copyright (c) 1997, 1998, 1999
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* Nan Yang Computer Services Limited. All rights reserved.
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*
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* Parts written by Greg Lehey
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*
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* This software is distributed under the so-called ``Berkeley
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* License'':
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Nan Yang Computer
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* Services Limited.
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* 4. Neither the name of the Company nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* This software is provided ``as is'', and any express or implied
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* warranties, including, but not limited to, the implied warranties of
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* merchantability and fitness for a particular purpose are disclaimed.
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* In no event shall the company or contributors be liable for any
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* direct, indirect, incidental, special, exemplary, or consequential
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* damages (including, but not limited to, procurement of substitute
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* goods or services; loss of use, data, or profits; or business
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* interruption) however caused and on any theory of liability, whether
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* in contract, strict liability, or tort (including negligence or
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* otherwise) arising in any way out of the use of this software, even if
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* advised of the possibility of such damage.
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*
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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/malloc.h>
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#include <sys/sbuf.h>
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#include <sys/systm.h>
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#include <geom/geom.h>
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#include <geom/geom_dbg.h>
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#include <geom/vinum/geom_vinum_var.h>
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#include <geom/vinum/geom_vinum.h>
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#include <geom/vinum/geom_vinum_share.h>
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int gv_drive_is_newer(struct gv_softc *, struct gv_drive *);
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static off_t gv_plex_smallest_sd(struct gv_plex *);
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void
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gv_parse_config(struct gv_softc *sc, char *buf, struct gv_drive *d)
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{
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char *aptr, *bptr, *cptr;
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struct gv_volume *v, *v2;
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struct gv_plex *p, *p2;
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struct gv_sd *s, *s2;
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int error, is_newer, tokens;
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char *token[GV_MAXARGS];
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is_newer = gv_drive_is_newer(sc, d);
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/* Until the end of the string *buf. */
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for (aptr = buf; *aptr != '\0'; aptr = bptr) {
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bptr = aptr;
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cptr = aptr;
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/* Separate input lines. */
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while (*bptr != '\n')
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bptr++;
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*bptr = '\0';
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bptr++;
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tokens = gv_tokenize(cptr, token, GV_MAXARGS);
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if (tokens <= 0)
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continue;
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if (!strcmp(token[0], "volume")) {
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v = gv_new_volume(tokens, token);
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if (v == NULL) {
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G_VINUM_DEBUG(0, "config parse failed volume");
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break;
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}
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v2 = gv_find_vol(sc, v->name);
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if (v2 != NULL) {
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if (is_newer) {
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v2->state = v->state;
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G_VINUM_DEBUG(2, "newer volume found!");
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}
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g_free(v);
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continue;
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}
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gv_create_volume(sc, v);
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} else if (!strcmp(token[0], "plex")) {
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p = gv_new_plex(tokens, token);
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if (p == NULL) {
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G_VINUM_DEBUG(0, "config parse failed plex");
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break;
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}
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p2 = gv_find_plex(sc, p->name);
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if (p2 != NULL) {
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/* XXX */
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if (is_newer) {
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p2->state = p->state;
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G_VINUM_DEBUG(2, "newer plex found!");
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}
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g_free(p);
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continue;
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}
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error = gv_create_plex(sc, p);
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if (error)
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continue;
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/*
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* These flags were set in gv_create_plex() and are not
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* needed here (on-disk config parsing).
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*/
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p->flags &= ~GV_PLEX_ADDED;
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} else if (!strcmp(token[0], "sd")) {
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s = gv_new_sd(tokens, token);
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if (s == NULL) {
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G_VINUM_DEBUG(0, "config parse failed subdisk");
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break;
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}
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s2 = gv_find_sd(sc, s->name);
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if (s2 != NULL) {
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/* XXX */
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if (is_newer) {
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s2->state = s->state;
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G_VINUM_DEBUG(2, "newer subdisk found!");
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}
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g_free(s);
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continue;
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}
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/*
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* Signal that this subdisk was tasted, and could
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* possibly reference a drive that isn't in our config
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* yet.
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*/
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s->flags |= GV_SD_TASTED;
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if (s->state == GV_SD_UP)
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s->flags |= GV_SD_CANGOUP;
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error = gv_create_sd(sc, s);
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if (error)
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continue;
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/*
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* This flag was set in gv_create_sd() and is not
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* needed here (on-disk config parsing).
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*/
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s->flags &= ~GV_SD_NEWBORN;
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s->flags &= ~GV_SD_GROW;
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}
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}
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}
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/*
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* Format the vinum configuration properly. If ondisk is non-zero then the
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* configuration is intended to be written to disk later.
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*/
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void
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gv_format_config(struct gv_softc *sc, struct sbuf *sb, int ondisk, char *prefix)
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{
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struct gv_drive *d;
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struct gv_sd *s;
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struct gv_plex *p;
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struct gv_volume *v;
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/*
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* We don't need the drive configuration if we're not writing the
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* config to disk.
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*/
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if (!ondisk) {
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LIST_FOREACH(d, &sc->drives, drive) {
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sbuf_printf(sb, "%sdrive %s device /dev/%s\n", prefix,
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d->name, d->device);
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}
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}
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LIST_FOREACH(v, &sc->volumes, volume) {
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if (!ondisk)
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sbuf_printf(sb, "%s", prefix);
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sbuf_printf(sb, "volume %s", v->name);
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if (ondisk)
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sbuf_printf(sb, " state %s", gv_volstate(v->state));
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sbuf_printf(sb, "\n");
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}
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LIST_FOREACH(p, &sc->plexes, plex) {
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if (!ondisk)
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sbuf_printf(sb, "%s", prefix);
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sbuf_printf(sb, "plex name %s org %s ", p->name,
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gv_plexorg(p->org));
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if (gv_is_striped(p))
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sbuf_printf(sb, "%ds ", p->stripesize / 512);
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if (p->vol_sc != NULL)
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sbuf_printf(sb, "vol %s", p->volume);
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if (ondisk)
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sbuf_printf(sb, " state %s", gv_plexstate(p->state));
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sbuf_printf(sb, "\n");
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}
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LIST_FOREACH(s, &sc->subdisks, sd) {
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if (!ondisk)
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sbuf_printf(sb, "%s", prefix);
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sbuf_printf(sb, "sd name %s drive %s len %jds driveoffset "
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"%jds", s->name, s->drive, s->size / 512,
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s->drive_offset / 512);
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if (s->plex_sc != NULL) {
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sbuf_printf(sb, " plex %s plexoffset %jds", s->plex,
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s->plex_offset / 512);
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}
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if (ondisk)
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sbuf_printf(sb, " state %s", gv_sdstate(s->state));
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sbuf_printf(sb, "\n");
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}
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}
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static off_t
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gv_plex_smallest_sd(struct gv_plex *p)
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{
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struct gv_sd *s;
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off_t smallest;
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KASSERT(p != NULL, ("gv_plex_smallest_sd: NULL p"));
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s = LIST_FIRST(&p->subdisks);
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if (s == NULL)
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return (-1);
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smallest = s->size;
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LIST_FOREACH(s, &p->subdisks, in_plex) {
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if (s->size < smallest)
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smallest = s->size;
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}
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return (smallest);
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}
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/* Walk over plexes in a volume and count how many are down. */
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int
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gv_plexdown(struct gv_volume *v)
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{
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int plexdown;
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struct gv_plex *p;
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KASSERT(v != NULL, ("gv_plexdown: NULL v"));
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plexdown = 0;
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LIST_FOREACH(p, &v->plexes, plex) {
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if (p->state == GV_PLEX_DOWN)
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plexdown++;
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}
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return (plexdown);
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}
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int
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gv_sd_to_plex(struct gv_sd *s, struct gv_plex *p)
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{
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struct gv_sd *s2;
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off_t psizeorig, remainder, smallest;
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/* If this subdisk was already given to this plex, do nothing. */
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if (s->plex_sc == p)
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return (0);
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/* Check correct size of this subdisk. */
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s2 = LIST_FIRST(&p->subdisks);
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/* Adjust the subdisk-size if necessary. */
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if (s2 != NULL && gv_is_striped(p)) {
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/* First adjust to the stripesize. */
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remainder = s->size % p->stripesize;
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if (remainder) {
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G_VINUM_DEBUG(1, "size of sd %s is not a "
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"multiple of plex stripesize, taking off "
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"%jd bytes", s->name,
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(intmax_t)remainder);
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gv_adjust_freespace(s, remainder);
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}
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smallest = gv_plex_smallest_sd(p);
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/* Then take off extra if other subdisks are smaller. */
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remainder = s->size - smallest;
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/*
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* Don't allow a remainder below zero for running plexes, it's too
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* painful, and if someone were to accidentally do this, the
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* resulting array might be smaller than the original... not god
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*/
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if (remainder < 0) {
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if (!(p->flags & GV_PLEX_NEWBORN)) {
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G_VINUM_DEBUG(0, "sd %s too small for plex %s!",
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s->name, p->name);
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return (GV_ERR_BADSIZE);
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}
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/* Adjust other subdisks. */
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LIST_FOREACH(s2, &p->subdisks, in_plex) {
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G_VINUM_DEBUG(1, "size of sd %s is to big, "
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"taking off %jd bytes", s->name,
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(intmax_t)remainder);
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gv_adjust_freespace(s2, (remainder * -1));
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}
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} else if (remainder > 0) {
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G_VINUM_DEBUG(1, "size of sd %s is to big, "
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"taking off %jd bytes", s->name,
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(intmax_t)remainder);
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gv_adjust_freespace(s, remainder);
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}
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}
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/* Find the correct plex offset for this subdisk, if needed. */
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if (s->plex_offset == -1) {
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/*
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* First set it to 0 to catch the case where we had a detached
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* subdisk that didn't get any good offset.
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*/
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s->plex_offset = 0;
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if (p->sdcount) {
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LIST_FOREACH(s2, &p->subdisks, in_plex) {
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if (gv_is_striped(p))
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s->plex_offset = p->sdcount *
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p->stripesize;
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else
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s->plex_offset = s2->plex_offset +
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s2->size;
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}
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}
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}
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/* There are no subdisks for this plex yet, just insert it. */
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if (LIST_EMPTY(&p->subdisks)) {
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LIST_INSERT_HEAD(&p->subdisks, s, in_plex);
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/* Insert in correct order, depending on plex_offset. */
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} else {
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LIST_FOREACH(s2, &p->subdisks, in_plex) {
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if (s->plex_offset < s2->plex_offset) {
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LIST_INSERT_BEFORE(s2, s, in_plex);
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break;
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} else if (LIST_NEXT(s2, in_plex) == NULL) {
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LIST_INSERT_AFTER(s2, s, in_plex);
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break;
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}
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}
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}
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s->plex_sc = p;
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/* Adjust the size of our plex. We check if the plex misses a subdisk,
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* so we don't make the plex smaller than it actually should be.
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*/
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psizeorig = p->size;
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p->size = gv_plex_size(p);
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/* Make sure the size is not changed. */
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if (p->sddetached > 0) {
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if (p->size < psizeorig) {
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p->size = psizeorig;
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/* We make sure wee need another subdisk. */
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if (p->sddetached == 1)
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p->sddetached++;
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}
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p->sddetached--;
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} else {
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if ((p->org == GV_PLEX_RAID5 ||
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p->org == GV_PLEX_STRIPED) &&
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!(p->flags & GV_PLEX_NEWBORN) &&
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p->state == GV_PLEX_UP) {
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s->flags |= GV_SD_GROW;
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}
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p->sdcount++;
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}
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return (0);
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}
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void
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gv_update_vol_size(struct gv_volume *v, off_t size)
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{
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if (v == NULL)
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return;
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if (v->provider != NULL) {
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g_topology_lock();
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v->provider->mediasize = size;
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g_topology_unlock();
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}
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v->size = size;
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}
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/* Return how many subdisks that constitute the original plex. */
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int
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gv_sdcount(struct gv_plex *p, int growing)
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{
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struct gv_sd *s;
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int sdcount;
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sdcount = p->sdcount;
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if (growing) {
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LIST_FOREACH(s, &p->subdisks, in_plex) {
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if (s->flags & GV_SD_GROW)
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sdcount--;
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}
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}
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return (sdcount);
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}
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|
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/* Calculates the plex size. */
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off_t
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gv_plex_size(struct gv_plex *p)
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{
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struct gv_sd *s;
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off_t size;
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int sdcount;
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KASSERT(p != NULL, ("gv_plex_size: NULL p"));
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/* Adjust the size of our plex. */
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size = 0;
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sdcount = gv_sdcount(p, 1);
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switch (p->org) {
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case GV_PLEX_CONCAT:
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LIST_FOREACH(s, &p->subdisks, in_plex)
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size += s->size;
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break;
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case GV_PLEX_STRIPED:
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s = LIST_FIRST(&p->subdisks);
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size = ((s != NULL) ? (sdcount * s->size) : 0);
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break;
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case GV_PLEX_RAID5:
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s = LIST_FIRST(&p->subdisks);
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size = ((s != NULL) ? ((sdcount - 1) * s->size) : 0);
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break;
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}
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|
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return (size);
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}
|
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|
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/* Returns the size of a volume. */
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off_t
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gv_vol_size(struct gv_volume *v)
|
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{
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struct gv_plex *p;
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off_t minplexsize;
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KASSERT(v != NULL, ("gv_vol_size: NULL v"));
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p = LIST_FIRST(&v->plexes);
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if (p == NULL)
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return (0);
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|
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minplexsize = p->size;
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LIST_FOREACH(p, &v->plexes, in_volume) {
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if (p->size < minplexsize) {
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minplexsize = p->size;
|
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}
|
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}
|
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return (minplexsize);
|
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}
|
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|
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void
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gv_update_plex_config(struct gv_plex *p)
|
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{
|
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struct gv_sd *s, *s2;
|
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off_t remainder;
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int required_sds, state;
|
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|
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KASSERT(p != NULL, ("gv_update_plex_config: NULL p"));
|
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|
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/* The plex was added to an already running volume. */
|
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if (p->flags & GV_PLEX_ADDED)
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gv_set_plex_state(p, GV_PLEX_DOWN, GV_SETSTATE_FORCE);
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|
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switch (p->org) {
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case GV_PLEX_STRIPED:
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required_sds = 2;
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break;
|
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case GV_PLEX_RAID5:
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required_sds = 3;
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break;
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case GV_PLEX_CONCAT:
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default:
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required_sds = 0;
|
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break;
|
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}
|
|
|
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if (required_sds) {
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if (p->sdcount < required_sds) {
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gv_set_plex_state(p, GV_PLEX_DOWN, GV_SETSTATE_FORCE);
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}
|
|
|
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/*
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* The subdisks in striped plexes must all have the same size.
|
|
*/
|
|
s = LIST_FIRST(&p->subdisks);
|
|
LIST_FOREACH(s2, &p->subdisks, in_plex) {
|
|
if (s->size != s2->size) {
|
|
G_VINUM_DEBUG(0, "subdisk size mismatch %s"
|
|
"(%jd) <> %s (%jd)", s->name, s->size,
|
|
s2->name, s2->size);
|
|
gv_set_plex_state(p, GV_PLEX_DOWN,
|
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GV_SETSTATE_FORCE);
|
|
}
|
|
}
|
|
|
|
LIST_FOREACH(s, &p->subdisks, in_plex) {
|
|
/* Trim subdisk sizes to match the stripe size. */
|
|
remainder = s->size % p->stripesize;
|
|
if (remainder) {
|
|
G_VINUM_DEBUG(1, "size of sd %s is not a "
|
|
"multiple of plex stripesize, taking off "
|
|
"%jd bytes", s->name, (intmax_t)remainder);
|
|
gv_adjust_freespace(s, remainder);
|
|
}
|
|
}
|
|
}
|
|
|
|
p->size = gv_plex_size(p);
|
|
if (p->sdcount == 0)
|
|
gv_set_plex_state(p, GV_PLEX_DOWN, GV_SETSTATE_FORCE);
|
|
else if (p->org == GV_PLEX_RAID5 && p->flags & GV_PLEX_NEWBORN) {
|
|
LIST_FOREACH(s, &p->subdisks, in_plex)
|
|
gv_set_sd_state(s, GV_SD_UP, GV_SETSTATE_FORCE);
|
|
/* If added to a volume, we want the plex to be down. */
|
|
state = (p->flags & GV_PLEX_ADDED) ? GV_PLEX_DOWN : GV_PLEX_UP;
|
|
gv_set_plex_state(p, state, GV_SETSTATE_FORCE);
|
|
p->flags &= ~GV_PLEX_ADDED;
|
|
} else if (p->flags & GV_PLEX_ADDED) {
|
|
LIST_FOREACH(s, &p->subdisks, in_plex)
|
|
gv_set_sd_state(s, GV_SD_STALE, GV_SETSTATE_FORCE);
|
|
gv_set_plex_state(p, GV_PLEX_DOWN, GV_SETSTATE_FORCE);
|
|
p->flags &= ~GV_PLEX_ADDED;
|
|
} else if (p->state == GV_PLEX_UP) {
|
|
LIST_FOREACH(s, &p->subdisks, in_plex) {
|
|
if (s->flags & GV_SD_GROW) {
|
|
gv_set_plex_state(p, GV_PLEX_GROWABLE,
|
|
GV_SETSTATE_FORCE);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
/* Our plex is grown up now. */
|
|
p->flags &= ~GV_PLEX_NEWBORN;
|
|
}
|
|
|
|
/*
|
|
* Give a subdisk to a drive, check and adjust several parameters, adjust
|
|
* freelist.
|
|
*/
|
|
int
|
|
gv_sd_to_drive(struct gv_sd *s, struct gv_drive *d)
|
|
{
|
|
struct gv_sd *s2;
|
|
struct gv_freelist *fl, *fl2;
|
|
off_t tmp;
|
|
int i;
|
|
|
|
fl2 = NULL;
|
|
|
|
/* Shortcut for "referenced" drives. */
|
|
if (d->flags & GV_DRIVE_REFERENCED) {
|
|
s->drive_sc = d;
|
|
return (0);
|
|
}
|
|
|
|
/* Check if this subdisk was already given to this drive. */
|
|
if (s->drive_sc != NULL) {
|
|
if (s->drive_sc == d) {
|
|
if (!(s->flags & GV_SD_TASTED)) {
|
|
return (0);
|
|
}
|
|
} else {
|
|
G_VINUM_DEBUG(0, "error giving subdisk '%s' to '%s' "
|
|
"(already on '%s')", s->name, d->name,
|
|
s->drive_sc->name);
|
|
return (GV_ERR_ISATTACHED);
|
|
}
|
|
}
|
|
|
|
/* Preliminary checks. */
|
|
if ((s->size > d->avail) || (d->freelist_entries == 0)) {
|
|
G_VINUM_DEBUG(0, "not enough space on '%s' for '%s'", d->name,
|
|
s->name);
|
|
return (GV_ERR_NOSPACE);
|
|
}
|
|
|
|
/* If no size was given for this subdisk, try to auto-size it... */
|
|
if (s->size == -1) {
|
|
/* Find the largest available slot. */
|
|
LIST_FOREACH(fl, &d->freelist, freelist) {
|
|
if (fl->size < s->size)
|
|
continue;
|
|
s->size = fl->size;
|
|
s->drive_offset = fl->offset;
|
|
fl2 = fl;
|
|
}
|
|
|
|
/* No good slot found? */
|
|
if (s->size == -1) {
|
|
G_VINUM_DEBUG(0, "unable to autosize '%s' on '%s'",
|
|
s->name, d->name);
|
|
return (GV_ERR_BADSIZE);
|
|
}
|
|
|
|
/*
|
|
* ... or check if we have a free slot that's large enough for the
|
|
* given size.
|
|
*/
|
|
} else {
|
|
i = 0;
|
|
LIST_FOREACH(fl, &d->freelist, freelist) {
|
|
if (fl->size < s->size)
|
|
continue;
|
|
/* Assign drive offset, if not given. */
|
|
if (s->drive_offset == -1)
|
|
s->drive_offset = fl->offset;
|
|
fl2 = fl;
|
|
i++;
|
|
break;
|
|
}
|
|
|
|
/* Couldn't find a good free slot. */
|
|
if (i == 0) {
|
|
G_VINUM_DEBUG(0, "free slots to small for '%s' on '%s'",
|
|
s->name, d->name);
|
|
return (GV_ERR_NOSPACE);
|
|
}
|
|
}
|
|
|
|
/* No drive offset given, try to calculate it. */
|
|
if (s->drive_offset == -1) {
|
|
/* Add offsets and sizes from other subdisks on this drive. */
|
|
LIST_FOREACH(s2, &d->subdisks, from_drive) {
|
|
s->drive_offset = s2->drive_offset + s2->size;
|
|
}
|
|
|
|
/*
|
|
* If there are no other subdisks yet, then set the default
|
|
* offset to GV_DATA_START.
|
|
*/
|
|
if (s->drive_offset == -1)
|
|
s->drive_offset = GV_DATA_START;
|
|
|
|
/* Check if we have a free slot at the given drive offset. */
|
|
} else {
|
|
i = 0;
|
|
LIST_FOREACH(fl, &d->freelist, freelist) {
|
|
/* Yes, this subdisk fits. */
|
|
if ((fl->offset <= s->drive_offset) &&
|
|
(fl->offset + fl->size >=
|
|
s->drive_offset + s->size)) {
|
|
i++;
|
|
fl2 = fl;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Couldn't find a good free slot. */
|
|
if (i == 0) {
|
|
G_VINUM_DEBUG(0, "given drive_offset for '%s' won't fit "
|
|
"on '%s'", s->name, d->name);
|
|
return (GV_ERR_NOSPACE);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now that all parameters are checked and set up, we can give the
|
|
* subdisk to the drive and adjust the freelist.
|
|
*/
|
|
|
|
/* First, adjust the freelist. */
|
|
LIST_FOREACH(fl, &d->freelist, freelist) {
|
|
/* Look for the free slot that we have found before. */
|
|
if (fl != fl2)
|
|
continue;
|
|
|
|
/* The subdisk starts at the beginning of the free slot. */
|
|
if (fl->offset == s->drive_offset) {
|
|
fl->offset += s->size;
|
|
fl->size -= s->size;
|
|
|
|
/* The subdisk uses the whole slot, so remove it. */
|
|
if (fl->size == 0) {
|
|
d->freelist_entries--;
|
|
LIST_REMOVE(fl, freelist);
|
|
}
|
|
/*
|
|
* The subdisk does not start at the beginning of the free
|
|
* slot.
|
|
*/
|
|
} else {
|
|
tmp = fl->offset + fl->size;
|
|
fl->size = s->drive_offset - fl->offset;
|
|
|
|
/*
|
|
* The subdisk didn't use the complete rest of the free
|
|
* slot, so we need to split it.
|
|
*/
|
|
if (s->drive_offset + s->size != tmp) {
|
|
fl2 = g_malloc(sizeof(*fl2), M_WAITOK | M_ZERO);
|
|
fl2->offset = s->drive_offset + s->size;
|
|
fl2->size = tmp - fl2->offset;
|
|
LIST_INSERT_AFTER(fl, fl2, freelist);
|
|
d->freelist_entries++;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* This is the first subdisk on this drive, just insert it into the
|
|
* list.
|
|
*/
|
|
if (LIST_EMPTY(&d->subdisks)) {
|
|
LIST_INSERT_HEAD(&d->subdisks, s, from_drive);
|
|
|
|
/* There are other subdisks, so insert this one in correct order. */
|
|
} else {
|
|
LIST_FOREACH(s2, &d->subdisks, from_drive) {
|
|
if (s->drive_offset < s2->drive_offset) {
|
|
LIST_INSERT_BEFORE(s2, s, from_drive);
|
|
break;
|
|
} else if (LIST_NEXT(s2, from_drive) == NULL) {
|
|
LIST_INSERT_AFTER(s2, s, from_drive);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
d->sdcount++;
|
|
d->avail -= s->size;
|
|
|
|
s->flags &= ~GV_SD_TASTED;
|
|
|
|
/* Link back from the subdisk to this drive. */
|
|
s->drive_sc = d;
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
gv_free_sd(struct gv_sd *s)
|
|
{
|
|
struct gv_drive *d;
|
|
struct gv_freelist *fl, *fl2;
|
|
|
|
KASSERT(s != NULL, ("gv_free_sd: NULL s"));
|
|
|
|
d = s->drive_sc;
|
|
if (d == NULL)
|
|
return;
|
|
|
|
/*
|
|
* First, find the free slot that's immediately before or after this
|
|
* subdisk.
|
|
*/
|
|
fl = NULL;
|
|
LIST_FOREACH(fl, &d->freelist, freelist) {
|
|
if (fl->offset == s->drive_offset + s->size)
|
|
break;
|
|
if (fl->offset + fl->size == s->drive_offset)
|
|
break;
|
|
}
|
|
|
|
/* If there is no free slot behind this subdisk, so create one. */
|
|
if (fl == NULL) {
|
|
fl = g_malloc(sizeof(*fl), M_WAITOK | M_ZERO);
|
|
fl->size = s->size;
|
|
fl->offset = s->drive_offset;
|
|
|
|
if (d->freelist_entries == 0) {
|
|
LIST_INSERT_HEAD(&d->freelist, fl, freelist);
|
|
} else {
|
|
LIST_FOREACH(fl2, &d->freelist, freelist) {
|
|
if (fl->offset < fl2->offset) {
|
|
LIST_INSERT_BEFORE(fl2, fl, freelist);
|
|
break;
|
|
} else if (LIST_NEXT(fl2, freelist) == NULL) {
|
|
LIST_INSERT_AFTER(fl2, fl, freelist);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
d->freelist_entries++;
|
|
|
|
/* Expand the free slot we just found. */
|
|
} else {
|
|
fl->size += s->size;
|
|
if (fl->offset > s->drive_offset)
|
|
fl->offset = s->drive_offset;
|
|
}
|
|
|
|
d->avail += s->size;
|
|
d->sdcount--;
|
|
}
|
|
|
|
void
|
|
gv_adjust_freespace(struct gv_sd *s, off_t remainder)
|
|
{
|
|
struct gv_drive *d;
|
|
struct gv_freelist *fl, *fl2;
|
|
|
|
KASSERT(s != NULL, ("gv_adjust_freespace: NULL s"));
|
|
d = s->drive_sc;
|
|
KASSERT(d != NULL, ("gv_adjust_freespace: NULL d"));
|
|
|
|
/* First, find the free slot that's immediately after this subdisk. */
|
|
fl = NULL;
|
|
LIST_FOREACH(fl, &d->freelist, freelist) {
|
|
if (fl->offset == s->drive_offset + s->size)
|
|
break;
|
|
}
|
|
|
|
/* If there is no free slot behind this subdisk, so create one. */
|
|
if (fl == NULL) {
|
|
fl = g_malloc(sizeof(*fl), M_WAITOK | M_ZERO);
|
|
fl->size = remainder;
|
|
fl->offset = s->drive_offset + s->size - remainder;
|
|
|
|
if (d->freelist_entries == 0) {
|
|
LIST_INSERT_HEAD(&d->freelist, fl, freelist);
|
|
} else {
|
|
LIST_FOREACH(fl2, &d->freelist, freelist) {
|
|
if (fl->offset < fl2->offset) {
|
|
LIST_INSERT_BEFORE(fl2, fl, freelist);
|
|
break;
|
|
} else if (LIST_NEXT(fl2, freelist) == NULL) {
|
|
LIST_INSERT_AFTER(fl2, fl, freelist);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
d->freelist_entries++;
|
|
|
|
/* Expand the free slot we just found. */
|
|
} else {
|
|
fl->offset -= remainder;
|
|
fl->size += remainder;
|
|
}
|
|
|
|
s->size -= remainder;
|
|
d->avail += remainder;
|
|
}
|
|
|
|
/* Check if the given plex is a striped one. */
|
|
int
|
|
gv_is_striped(struct gv_plex *p)
|
|
{
|
|
KASSERT(p != NULL, ("gv_is_striped: NULL p"));
|
|
switch(p->org) {
|
|
case GV_PLEX_STRIPED:
|
|
case GV_PLEX_RAID5:
|
|
return (1);
|
|
default:
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
/* Find a volume by name. */
|
|
struct gv_volume *
|
|
gv_find_vol(struct gv_softc *sc, char *name)
|
|
{
|
|
struct gv_volume *v;
|
|
|
|
LIST_FOREACH(v, &sc->volumes, volume) {
|
|
if (!strncmp(v->name, name, GV_MAXVOLNAME))
|
|
return (v);
|
|
}
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
/* Find a plex by name. */
|
|
struct gv_plex *
|
|
gv_find_plex(struct gv_softc *sc, char *name)
|
|
{
|
|
struct gv_plex *p;
|
|
|
|
LIST_FOREACH(p, &sc->plexes, plex) {
|
|
if (!strncmp(p->name, name, GV_MAXPLEXNAME))
|
|
return (p);
|
|
}
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
/* Find a subdisk by name. */
|
|
struct gv_sd *
|
|
gv_find_sd(struct gv_softc *sc, char *name)
|
|
{
|
|
struct gv_sd *s;
|
|
|
|
LIST_FOREACH(s, &sc->subdisks, sd) {
|
|
if (!strncmp(s->name, name, GV_MAXSDNAME))
|
|
return (s);
|
|
}
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
/* Find a drive by name. */
|
|
struct gv_drive *
|
|
gv_find_drive(struct gv_softc *sc, char *name)
|
|
{
|
|
struct gv_drive *d;
|
|
|
|
LIST_FOREACH(d, &sc->drives, drive) {
|
|
if (!strncmp(d->name, name, GV_MAXDRIVENAME))
|
|
return (d);
|
|
}
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
/* Find a drive given a device. */
|
|
struct gv_drive *
|
|
gv_find_drive_device(struct gv_softc *sc, char *device)
|
|
{
|
|
struct gv_drive *d;
|
|
|
|
LIST_FOREACH(d, &sc->drives, drive) {
|
|
if(!strcmp(d->device, device))
|
|
return (d);
|
|
}
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
/* Check if any consumer of the given geom is open. */
|
|
int
|
|
gv_consumer_is_open(struct g_consumer *cp)
|
|
{
|
|
if (cp == NULL)
|
|
return (0);
|
|
|
|
if (cp->acr || cp->acw || cp->ace)
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
gv_provider_is_open(struct g_provider *pp)
|
|
{
|
|
if (pp == NULL)
|
|
return (0);
|
|
|
|
if (pp->acr || pp->acw || pp->ace)
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Compare the modification dates of the drives.
|
|
* Return 1 if a > b, 0 otherwise.
|
|
*/
|
|
int
|
|
gv_drive_is_newer(struct gv_softc *sc, struct gv_drive *d)
|
|
{
|
|
struct gv_drive *d2;
|
|
struct timeval *a, *b;
|
|
|
|
KASSERT(!LIST_EMPTY(&sc->drives),
|
|
("gv_is_drive_newer: empty drive list"));
|
|
|
|
a = &d->hdr->label.last_update;
|
|
LIST_FOREACH(d2, &sc->drives, drive) {
|
|
if ((d == d2) || (d2->state != GV_DRIVE_UP) ||
|
|
(d2->hdr == NULL))
|
|
continue;
|
|
b = &d2->hdr->label.last_update;
|
|
if (timevalcmp(a, b, >))
|
|
return (1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* Return the type of object identified by string 'name'. */
|
|
int
|
|
gv_object_type(struct gv_softc *sc, char *name)
|
|
{
|
|
struct gv_drive *d;
|
|
struct gv_plex *p;
|
|
struct gv_sd *s;
|
|
struct gv_volume *v;
|
|
|
|
LIST_FOREACH(v, &sc->volumes, volume) {
|
|
if (!strncmp(v->name, name, GV_MAXVOLNAME))
|
|
return (GV_TYPE_VOL);
|
|
}
|
|
|
|
LIST_FOREACH(p, &sc->plexes, plex) {
|
|
if (!strncmp(p->name, name, GV_MAXPLEXNAME))
|
|
return (GV_TYPE_PLEX);
|
|
}
|
|
|
|
LIST_FOREACH(s, &sc->subdisks, sd) {
|
|
if (!strncmp(s->name, name, GV_MAXSDNAME))
|
|
return (GV_TYPE_SD);
|
|
}
|
|
|
|
LIST_FOREACH(d, &sc->drives, drive) {
|
|
if (!strncmp(d->name, name, GV_MAXDRIVENAME))
|
|
return (GV_TYPE_DRIVE);
|
|
}
|
|
|
|
return (GV_ERR_NOTFOUND);
|
|
}
|
|
|
|
void
|
|
gv_setup_objects(struct gv_softc *sc)
|
|
{
|
|
struct g_provider *pp;
|
|
struct gv_volume *v;
|
|
struct gv_plex *p;
|
|
struct gv_sd *s;
|
|
struct gv_drive *d;
|
|
|
|
LIST_FOREACH(s, &sc->subdisks, sd) {
|
|
d = gv_find_drive(sc, s->drive);
|
|
if (d != NULL)
|
|
gv_sd_to_drive(s, d);
|
|
p = gv_find_plex(sc, s->plex);
|
|
if (p != NULL)
|
|
gv_sd_to_plex(s, p);
|
|
gv_update_sd_state(s);
|
|
}
|
|
|
|
LIST_FOREACH(p, &sc->plexes, plex) {
|
|
gv_update_plex_config(p);
|
|
v = gv_find_vol(sc, p->volume);
|
|
if (v != NULL && p->vol_sc != v) {
|
|
p->vol_sc = v;
|
|
v->plexcount++;
|
|
LIST_INSERT_HEAD(&v->plexes, p, in_volume);
|
|
}
|
|
gv_update_plex_config(p);
|
|
}
|
|
|
|
LIST_FOREACH(v, &sc->volumes, volume) {
|
|
v->size = gv_vol_size(v);
|
|
if (v->provider == NULL) {
|
|
g_topology_lock();
|
|
pp = g_new_providerf(sc->geom, "gvinum/%s", v->name);
|
|
pp->mediasize = v->size;
|
|
pp->sectorsize = 512; /* XXX */
|
|
g_error_provider(pp, 0);
|
|
v->provider = pp;
|
|
pp->private = v;
|
|
g_topology_unlock();
|
|
} else if (v->provider->mediasize != v->size) {
|
|
g_topology_lock();
|
|
v->provider->mediasize = v->size;
|
|
g_topology_unlock();
|
|
}
|
|
v->flags &= ~GV_VOL_NEWBORN;
|
|
gv_update_vol_state(v);
|
|
}
|
|
}
|
|
|
|
void
|
|
gv_cleanup(struct gv_softc *sc)
|
|
{
|
|
struct gv_volume *v, *v2;
|
|
struct gv_plex *p, *p2;
|
|
struct gv_sd *s, *s2;
|
|
struct gv_drive *d, *d2;
|
|
struct gv_freelist *fl, *fl2;
|
|
|
|
mtx_lock(&sc->config_mtx);
|
|
LIST_FOREACH_SAFE(v, &sc->volumes, volume, v2) {
|
|
LIST_REMOVE(v, volume);
|
|
g_free(v->wqueue);
|
|
g_free(v);
|
|
}
|
|
LIST_FOREACH_SAFE(p, &sc->plexes, plex, p2) {
|
|
LIST_REMOVE(p, plex);
|
|
g_free(p->bqueue);
|
|
g_free(p->rqueue);
|
|
g_free(p->wqueue);
|
|
g_free(p);
|
|
}
|
|
LIST_FOREACH_SAFE(s, &sc->subdisks, sd, s2) {
|
|
LIST_REMOVE(s, sd);
|
|
g_free(s);
|
|
}
|
|
LIST_FOREACH_SAFE(d, &sc->drives, drive, d2) {
|
|
LIST_FOREACH_SAFE(fl, &d->freelist, freelist, fl2) {
|
|
LIST_REMOVE(fl, freelist);
|
|
g_free(fl);
|
|
}
|
|
LIST_REMOVE(d, drive);
|
|
g_free(d->hdr);
|
|
g_free(d);
|
|
}
|
|
mtx_destroy(&sc->config_mtx);
|
|
}
|
|
|
|
/* General 'attach' routine. */
|
|
int
|
|
gv_attach_plex(struct gv_plex *p, struct gv_volume *v, int rename)
|
|
{
|
|
struct gv_sd *s;
|
|
struct gv_softc *sc __diagused;
|
|
|
|
g_topology_assert();
|
|
|
|
sc = p->vinumconf;
|
|
KASSERT(sc != NULL, ("NULL sc"));
|
|
|
|
if (p->vol_sc != NULL) {
|
|
G_VINUM_DEBUG(1, "unable to attach %s: already attached to %s",
|
|
p->name, p->volume);
|
|
return (GV_ERR_ISATTACHED);
|
|
}
|
|
|
|
/* Stale all subdisks of this plex. */
|
|
LIST_FOREACH(s, &p->subdisks, in_plex) {
|
|
if (s->state != GV_SD_STALE)
|
|
gv_set_sd_state(s, GV_SD_STALE, GV_SETSTATE_FORCE);
|
|
}
|
|
/* Attach to volume. Make sure volume is not up and running. */
|
|
if (gv_provider_is_open(v->provider)) {
|
|
G_VINUM_DEBUG(1, "unable to attach %s: volume %s is busy",
|
|
p->name, v->name);
|
|
return (GV_ERR_ISBUSY);
|
|
}
|
|
p->vol_sc = v;
|
|
strlcpy(p->volume, v->name, sizeof(p->volume));
|
|
v->plexcount++;
|
|
if (rename) {
|
|
snprintf(p->name, sizeof(p->name), "%s.p%d", v->name,
|
|
v->plexcount);
|
|
}
|
|
LIST_INSERT_HEAD(&v->plexes, p, in_volume);
|
|
|
|
/* Get plex up again. */
|
|
gv_update_vol_size(v, gv_vol_size(v));
|
|
gv_set_plex_state(p, GV_PLEX_UP, 0);
|
|
gv_save_config(p->vinumconf);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
gv_attach_sd(struct gv_sd *s, struct gv_plex *p, off_t offset, int rename)
|
|
{
|
|
struct gv_sd *s2;
|
|
int error;
|
|
|
|
g_topology_assert();
|
|
|
|
/* If subdisk is attached, don't do it. */
|
|
if (s->plex_sc != NULL) {
|
|
G_VINUM_DEBUG(1, "unable to attach %s: already attached to %s",
|
|
s->name, s->plex);
|
|
return (GV_ERR_ISATTACHED);
|
|
}
|
|
|
|
gv_set_sd_state(s, GV_SD_STALE, GV_SETSTATE_FORCE);
|
|
/* First check that this subdisk has a correct offset. If none other
|
|
* starts at the same, and it's correct module stripesize, it is */
|
|
if (offset != -1 && offset % p->stripesize != 0)
|
|
return (GV_ERR_BADOFFSET);
|
|
LIST_FOREACH(s2, &p->subdisks, in_plex) {
|
|
if (s2->plex_offset == offset)
|
|
return (GV_ERR_BADOFFSET);
|
|
}
|
|
|
|
/* Attach the subdisk to the plex at given offset. */
|
|
s->plex_offset = offset;
|
|
strlcpy(s->plex, p->name, sizeof(s->plex));
|
|
|
|
error = gv_sd_to_plex(s, p);
|
|
if (error)
|
|
return (error);
|
|
gv_update_plex_config(p);
|
|
|
|
if (rename) {
|
|
snprintf(s->name, sizeof(s->name), "%s.s%d", s->plex,
|
|
p->sdcount);
|
|
}
|
|
if (p->vol_sc != NULL)
|
|
gv_update_vol_size(p->vol_sc, gv_vol_size(p->vol_sc));
|
|
gv_save_config(p->vinumconf);
|
|
/* We don't update the subdisk state since the user might have to
|
|
* initiate a rebuild/sync first. */
|
|
return (0);
|
|
}
|
|
|
|
/* Detach a plex from a volume. */
|
|
int
|
|
gv_detach_plex(struct gv_plex *p, int flags)
|
|
{
|
|
struct gv_volume *v;
|
|
|
|
g_topology_assert();
|
|
v = p->vol_sc;
|
|
|
|
if (v == NULL) {
|
|
G_VINUM_DEBUG(1, "unable to detach %s: already detached",
|
|
p->name);
|
|
return (0); /* Not an error. */
|
|
}
|
|
|
|
/*
|
|
* Only proceed if forced or volume inactive.
|
|
*/
|
|
if (!(flags & GV_FLAG_F) && (gv_provider_is_open(v->provider) ||
|
|
p->state == GV_PLEX_UP)) {
|
|
G_VINUM_DEBUG(1, "unable to detach %s: volume %s is busy",
|
|
p->name, p->volume);
|
|
return (GV_ERR_ISBUSY);
|
|
}
|
|
v->plexcount--;
|
|
/* Make sure someone don't read us when gone. */
|
|
v->last_read_plex = NULL;
|
|
LIST_REMOVE(p, in_volume);
|
|
p->vol_sc = NULL;
|
|
memset(p->volume, 0, GV_MAXVOLNAME);
|
|
gv_update_vol_size(v, gv_vol_size(v));
|
|
gv_save_config(p->vinumconf);
|
|
return (0);
|
|
}
|
|
|
|
/* Detach a subdisk from a plex. */
|
|
int
|
|
gv_detach_sd(struct gv_sd *s, int flags)
|
|
{
|
|
struct gv_plex *p;
|
|
|
|
g_topology_assert();
|
|
p = s->plex_sc;
|
|
|
|
if (p == NULL) {
|
|
G_VINUM_DEBUG(1, "unable to detach %s: already detached",
|
|
s->name);
|
|
return (0); /* Not an error. */
|
|
}
|
|
|
|
/*
|
|
* Don't proceed if we're not forcing, and the plex is up, or degraded
|
|
* with this subdisk up.
|
|
*/
|
|
if (!(flags & GV_FLAG_F) && ((p->state > GV_PLEX_DEGRADED) ||
|
|
((p->state == GV_PLEX_DEGRADED) && (s->state == GV_SD_UP)))) {
|
|
G_VINUM_DEBUG(1, "unable to detach %s: plex %s is busy",
|
|
s->name, s->plex);
|
|
return (GV_ERR_ISBUSY);
|
|
}
|
|
|
|
LIST_REMOVE(s, in_plex);
|
|
s->plex_sc = NULL;
|
|
memset(s->plex, 0, GV_MAXPLEXNAME);
|
|
p->sddetached++;
|
|
gv_save_config(s->vinumconf);
|
|
return (0);
|
|
}
|