diff options
Diffstat (limited to 'sys/geom/vinum/geom_vinum.c')
-rw-r--r-- | sys/geom/vinum/geom_vinum.c | 569 |
1 files changed, 569 insertions, 0 deletions
diff --git a/sys/geom/vinum/geom_vinum.c b/sys/geom/vinum/geom_vinum.c new file mode 100644 index 000000000000..44a8061c4dfd --- /dev/null +++ b/sys/geom/vinum/geom_vinum.c @@ -0,0 +1,569 @@ +/* + * Copyright (c) 2004 Lukas Ertl + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/bio.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/malloc.h> +#include <sys/module.h> +#include <sys/mutex.h> +#include <sys/systm.h> + +#include <geom/geom.h> +#include <geom/vinum/geom_vinum_var.h> +#include <geom/vinum/geom_vinum.h> +#include <geom/vinum/geom_vinum_share.h> + +#if 0 +SYSCTL_DECL(_kern_geom); +SYSCTL_NODE(_kern_geom, OID_AUTO, vinum, CTLFLAG_RW, 0, "GEOM_VINUM stuff"); +SYSCTL_UINT(_kern_geom_vinum, OID_AUTO, debug, CTLFLAG_RW, &gv_debug, 0, + "Debug level"); +#endif + +int gv_create(struct g_geom *, struct gctl_req *); +void config_new_drive(struct gv_drive *); + +static void +gv_orphan(struct g_consumer *cp) +{ + struct g_geom *gp; + struct gv_softc *sc; + int error; + + g_topology_assert(); + + KASSERT(cp != NULL, ("gv_orphan: null cp")); + gp = cp->geom; + KASSERT(gp != NULL, ("gv_orphan: null gp")); + sc = gp->softc; + + g_trace(G_T_TOPOLOGY, "gv_orphan(%s)", gp->name); + + if (cp->acr != 0 || cp->acw != 0 || cp->ace != 0) + g_access(cp, -cp->acr, -cp->acw, -cp->ace); + error = cp->provider->error; + if (error == 0) + error = ENXIO; + g_detach(cp); + g_destroy_consumer(cp); + if (!LIST_EMPTY(&gp->consumer)) + return; + g_free(sc); + g_wither_geom(gp, error); +} + +static void +gv_start(struct bio *bp) +{ + struct bio *bp2; + struct g_geom *gp; + + gp = bp->bio_to->geom; + switch(bp->bio_cmd) { + case BIO_READ: + case BIO_WRITE: + case BIO_DELETE: + bp2 = g_clone_bio(bp); + bp2->bio_done = g_std_done; + g_io_request(bp2, LIST_FIRST(&gp->consumer)); + return; + default: + g_io_deliver(bp, EOPNOTSUPP); + return; + } +} + +static int +gv_access(struct g_provider *pp, int dr, int dw, int de) +{ + struct g_geom *gp; + struct g_consumer *cp; + int error; + + gp = pp->geom; + error = ENXIO; + cp = LIST_FIRST(&gp->consumer); + error = g_access(cp, dr, dw, de); + return (error); +} + +static struct g_geom * +gv_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) +{ + struct g_geom *gp; + struct g_consumer *cp; + struct gv_softc *sc; + struct gv_hdr *vhdr; + int error, first; + char *buf; + + vhdr = NULL; + buf = NULL; + first = 0; + + g_trace(G_T_TOPOLOGY, "gv_taste(%s, %s)", mp->name, pp->name); + g_topology_assert(); + + if (pp->sectorsize == 0) + return (NULL); + + /* Check if we already have a VINUM geom, or create a new one. */ + if (LIST_EMPTY(&mp->geom)) { + gp = g_new_geomf(mp, "VINUM"); + gp->spoiled = gv_orphan; + gp->orphan = gv_orphan; + gp->access = gv_access; + gp->start = gv_start; + gp->softc = g_malloc(sizeof(struct gv_softc), + M_WAITOK | M_ZERO); + sc = gp->softc; + sc->geom = gp; + LIST_INIT(&sc->drives); + LIST_INIT(&sc->subdisks); + LIST_INIT(&sc->plexes); + LIST_INIT(&sc->volumes); + first++; + } else { + gp = LIST_FIRST(&mp->geom); + sc = gp->softc; + } + + + /* We need a temporary consumer to read the config from. */ + cp = g_new_consumer(gp); + error = g_attach(cp, pp); + if (error) { + g_destroy_consumer(cp); + if (first) { + g_free(sc); + g_destroy_geom(gp); + } + return (NULL); + } + error = g_access(cp, 1, 0, 0); + if (error) { + g_detach(cp); + g_destroy_consumer(cp); + if (first) { + g_free(gp->softc); + g_destroy_geom(gp); + } + return (NULL); + } + + g_topology_unlock(); + + /* Check if the provided slice is a valid vinum drive. */ + vhdr = g_read_data(cp, GV_HDR_OFFSET, GV_HDR_LEN, &error); + if (vhdr == NULL || error != 0) { + g_topology_lock(); + g_access(cp, -1, 0, 0); + g_detach(cp); + g_destroy_consumer(cp); + if (first) { + g_free(sc); + g_destroy_geom(gp); + } + return (NULL); + } + + /* This provider has no vinum magic on board. */ + if (vhdr->magic != GV_MAGIC) { + /* Release the temporary consumer, we don't need it anymore. */ + g_topology_lock(); + g_access(cp, -1, 0, 0); + g_detach(cp); + g_destroy_consumer(cp); + + g_free(vhdr); + + /* + * If there is no other VINUM geom yet just take this one; the + * configuration is still empty, but it can be filled by other + * valid vinum drives later. + */ + if (first) + return (gp); + else + return (NULL); + + /* + * We have found a valid vinum drive, now read the on-disk + * configuration. + */ + } else { + g_free(vhdr); + + buf = g_read_data(cp, GV_CFG_OFFSET, GV_CFG_LEN, + &error); + if (buf == NULL || error != 0) { + g_topology_lock(); + g_access(cp, -1, 0, 0); + g_detach(cp); + g_destroy_consumer(cp); + if (first) { + g_free(sc); + g_destroy_geom(gp); + } + return (NULL); + } + + /* Release the temporary consumer, we don't need it anymore. */ + g_topology_lock(); + g_access(cp, -1, 0, 0); + g_detach(cp); + g_destroy_consumer(cp); + + /* We are the first VINUM geom. */ + if (first) { + gv_parse_config(sc, buf, 0); + g_free(buf); + return (gp); + + /* Just merge the configs. */ + } else { + gv_parse_config(sc, buf, 1); + g_free(buf); + return (NULL); + } + } +} + +/* XXX this really belongs somewhere else */ +void +config_new_drive(struct gv_drive *d) +{ + struct gv_hdr *vhdr; + struct gv_freelist *fl; + + KASSERT(d != NULL, ("config_new_drive: NULL d")); + + vhdr = g_malloc(sizeof(*vhdr), M_WAITOK | M_ZERO); + vhdr->magic = GV_MAGIC; + vhdr->config_length = GV_CFG_LEN; + + bcopy(hostname, vhdr->label.sysname, GV_HOSTNAME_LEN); + strncpy(vhdr->label.name, d->name, GV_MAXDRIVENAME); + microtime(&vhdr->label.date_of_birth); + + d->hdr = vhdr; + + LIST_INIT(&d->subdisks); + LIST_INIT(&d->freelist); + + fl = g_malloc(sizeof(struct gv_freelist), M_WAITOK | M_ZERO); + fl->offset = GV_DATA_START; + fl->size = d->avail; + LIST_INSERT_HEAD(&d->freelist, fl, freelist); + d->freelist_entries = 1; + +} + +/* Handle userland requests for creating new objects. */ +int +gv_create(struct g_geom *gp, struct gctl_req *req) +{ + struct gv_softc *sc; + struct gv_drive *d, *d2; + struct gv_plex *p, *p2; + struct gv_sd *s, *s2; + struct gv_volume *v, *v2; + struct g_consumer *cp; + struct g_provider *pp; + int error, i, *drives, *plexes, *subdisks, *volumes; + char buf[20], errstr[ERRBUFSIZ]; + + g_topology_assert(); + + sc = gp->softc; + + /* Find out how many of each object have been passed in. */ + volumes = gctl_get_paraml(req, "volumes", sizeof(*volumes)); + plexes = gctl_get_paraml(req, "plexes", sizeof(*plexes)); + subdisks = gctl_get_paraml(req, "subdisks", sizeof(*subdisks)); + drives = gctl_get_paraml(req, "drives", sizeof(*drives)); + + /* First, handle drive definitions ... */ + for (i = 0; i < *drives; i++) { + snprintf(buf, sizeof(buf), "drive%d", i); + d2 = gctl_get_paraml(req, buf, sizeof(*d2)); + d = g_malloc(sizeof(*d), M_WAITOK | M_ZERO); + bcopy(d2, d, sizeof(*d)); + + /* XXX */ + pp = g_provider_by_name(d->device); + d->size = pp->mediasize - GV_DATA_START; + d->avail = d->size; + + config_new_drive(d); + + LIST_INSERT_HEAD(&sc->drives, d, drive); + } + + /* ... then volume definitions ... */ + for (i = 0; i < *volumes; i++) { + error = 0; + snprintf(buf, sizeof(buf), "volume%d", i); + v2 = gctl_get_paraml(req, buf, sizeof(*v2)); + + v = gv_find_vol(sc, v2->name); + if (v != NULL) { + gctl_error(req, "volume '%s' is already known", + v->name); + return (-1); + } + + v = g_malloc(sizeof(*v), M_WAITOK | M_ZERO); + bcopy(v2, v, sizeof(*v)); + + v->vinumconf = sc; + LIST_INIT(&v->plexes); + LIST_INSERT_HEAD(&sc->volumes, v, volume); + } + + /* ... then plex definitions ... */ + for (i = 0; i < *plexes; i++) { + error = 0; + snprintf(buf, sizeof(buf), "plex%d", i); + p2 = gctl_get_paraml(req, buf, sizeof(*p2)); + + p = gv_find_plex(sc, p2->name); + if (p != NULL) { + gctl_error(req, "plex '%s' is already known", p->name); + return (-1); + } + + p = g_malloc(sizeof(*p), M_WAITOK | M_ZERO); + bcopy(p2, p, sizeof(*p)); + + /* Find the volume this plex should be attached to. */ + v = gv_find_vol(sc, p->volume); + if (v != NULL) { + if (v->plexcount) + p->flags |= GV_PLEX_ADDED; + p->vol_sc = v; + v->plexcount++; + LIST_INSERT_HEAD(&v->plexes, p, in_volume); + } + + p->vinumconf = sc; + LIST_INIT(&p->subdisks); + LIST_INSERT_HEAD(&sc->plexes, p, plex); + } + + /* ... and finally, subdisk definitions. */ + for (i = 0; i < *subdisks; i++) { + error = 0; + snprintf(buf, sizeof(buf), "sd%d", i); + s2 = gctl_get_paraml(req, buf, sizeof(*s2)); + + s = gv_find_sd(sc, s2->name); + if (s != NULL) { + gctl_error(req, "subdisk '%s' is already known", + s->name); + return (-1); + } + + s = g_malloc(sizeof(*s), M_WAITOK | M_ZERO); + bcopy(s2, s, sizeof(*s)); + + /* Find the drive where this subdisk should be put on. */ + d = gv_find_drive(sc, s->drive); + + /* drive not found - XXX */ + if (d == NULL) { + printf("FOO: drive '%s' not found\n", s->drive); + g_free(s); + continue; + } + + /* Find the plex where this subdisk belongs to. */ + p = gv_find_plex(sc, s->plex); + + /* plex not found - XXX */ + if (p == NULL) { + printf("FOO: plex '%s' not found\n", s->plex); + g_free(s); + continue; + } + + /* + * First we give the subdisk to the drive, to handle autosized + * values ... + */ + error = gv_sd_to_drive(sc, d, s, errstr, sizeof(errstr)); + if (error) { + gctl_error(req, errstr); + g_free(s); + continue; + } + + /* + * Then, we give the subdisk to the plex; we check if the + * given values are correct and maybe adjust them. + */ + error = gv_sd_to_plex(p, s, 1); + if (error) { + printf("FOO: couldn't give sd '%s' to plex '%s'\n", + s->name, p->name); + } + s->flags |= GV_SD_NEWBORN; + + s->vinumconf = sc; + LIST_INSERT_HEAD(&sc->subdisks, s, sd); + } + + LIST_FOREACH(s, &sc->subdisks, sd) + gv_update_sd_state(s); + LIST_FOREACH(p, &sc->plexes, plex) + gv_update_plex_config(p); + LIST_FOREACH(v, &sc->volumes, volume) + gv_update_vol_state(v); + + /* + * Write out the configuration to each drive. If the drive doesn't + * have a valid geom_slice geom yet, attach it temporarily to our VINUM + * geom. + */ + LIST_FOREACH(d, &sc->drives, drive) { + if (d->geom == NULL) { + /* XXX */ + pp = g_provider_by_name(d->device); + cp = g_new_consumer(gp); + g_attach(cp, pp); + gv_save_config(cp, d, sc); + g_detach(cp); + g_destroy_consumer(cp); + } else + gv_save_config(NULL, d, sc); + } + + return (0); +} + +static void +gv_config(struct gctl_req *req, struct g_class *mp, char const *verb) +{ + struct g_geom *gp; + struct gv_softc *sc; + struct sbuf *sb; + char *comment; + + g_topology_assert(); + + gp = LIST_FIRST(&mp->geom); + sc = gp->softc; + + if (!strcmp(verb, "list")) { + gv_list(gp, req); + + /* Save our configuration back to disk. */ + } else if (!strcmp(verb, "saveconfig")) { + + gv_save_config_all(sc); + + /* Return configuration in string form. */ + } else if (!strcmp(verb, "getconfig")) { + comment = gctl_get_param(req, "comment", NULL); + + sb = sbuf_new(NULL, NULL, GV_CFG_LEN, SBUF_FIXEDLEN); + gv_format_config(sc, sb, 0, comment); + sbuf_finish(sb); + gctl_set_param(req, "config", sbuf_data(sb), sbuf_len(sb) + 1); + sbuf_delete(sb); + + } else if (!strcmp(verb, "create")) { + gv_create(gp, req); + + } else if (!strcmp(verb, "remove")) { + gv_remove(gp, req); + + } else if (!strcmp(verb, "start")) { + gv_start_obj(gp, req); + + } else + gctl_error(req, "Unknown verb parameter"); +} + +static int +gv_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp) +{ + struct g_geom *gp2; + struct gv_softc *sc; + struct gv_drive *d, *d2; + struct gv_freelist *fl, *fl2; + + g_trace(G_T_TOPOLOGY, "gv_destroy_geom: %s", gp->name); + g_topology_assert(); + + KASSERT(gp != NULL, ("gv_destroy_geom: null gp")); + KASSERT(gp->softc != NULL, ("gv_destroy_geom: null sc")); + + sc = gp->softc; + + /* + * Check if any of our drives is still open; if so, refuse destruction. + */ + LIST_FOREACH(d, &sc->drives, drive) { + gp2 = d->geom; + if (gv_is_open(gp2)) + return (EBUSY); + } + + LIST_FOREACH_SAFE(d, &sc->drives, drive, d2) { + g_free(d->hdr); + d->hdr = NULL; + LIST_FOREACH_SAFE(fl, &d->freelist, freelist, fl2) { + d->freelist_entries--; + LIST_REMOVE(fl, freelist); + g_free(fl); + fl = NULL; + } + LIST_REMOVE(d, drive); + } + + g_free(sc); + sc = NULL; + g_wither_geom(gp, ENXIO); + return (0); +} + +#define VINUM_CLASS_NAME "VINUM" + +static struct g_class g_vinum_class = { + .name = VINUM_CLASS_NAME, + .taste = gv_taste, + .destroy_geom = gv_destroy_geom, + .ctlreq = gv_config, +}; + +DECLARE_GEOM_CLASS(g_vinum_class, g_vinum); |