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freebsd-nq/sys/geom/vinum/geom_vinum_subr.c
Ulf Lilleengen 41944888fe - Fix a case where a RAID5 volume would think that it is supposed to grow a new 
subdisk after a parity rebuild.
2009-05-06 19:18:19 +00:00

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/*-
* Copyright (c) 2004, 2007 Lukas Ertl
* Copyright (c) 2007, 2009 Ulf Lilleengen
* Copyright (c) 1997, 1998, 1999
* Nan Yang Computer Services Limited. All rights reserved.
*
* Parts written by Greg Lehey
*
* This software is distributed under the so-called ``Berkeley
* License'':
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Nan Yang Computer
* Services Limited.
* 4. Neither the name of the Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* This software is provided ``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 the company 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/malloc.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>
int gv_drive_is_newer(struct gv_softc *, struct gv_drive *);
static off_t gv_plex_smallest_sd(struct gv_plex *);
void
gv_parse_config(struct gv_softc *sc, char *buf, struct gv_drive *d)
{
char *aptr, *bptr, *cptr;
struct gv_volume *v, *v2;
struct gv_plex *p, *p2;
struct gv_sd *s, *s2;
int error, is_newer, tokens;
char *token[GV_MAXARGS];
is_newer = gv_drive_is_newer(sc, d);
/* Until the end of the string *buf. */
for (aptr = buf; *aptr != '\0'; aptr = bptr) {
bptr = aptr;
cptr = aptr;
/* Seperate input lines. */
while (*bptr != '\n')
bptr++;
*bptr = '\0';
bptr++;
tokens = gv_tokenize(cptr, token, GV_MAXARGS);
if (tokens <= 0)
continue;
if (!strcmp(token[0], "volume")) {
v = gv_new_volume(tokens, token);
if (v == NULL) {
G_VINUM_DEBUG(0, "config parse failed volume");
break;
}
v2 = gv_find_vol(sc, v->name);
if (v2 != NULL) {
if (is_newer) {
v2->state = v->state;
G_VINUM_DEBUG(2, "newer volume found!");
}
g_free(v);
continue;
}
gv_create_volume(sc, v);
} else if (!strcmp(token[0], "plex")) {
p = gv_new_plex(tokens, token);
if (p == NULL) {
G_VINUM_DEBUG(0, "config parse failed plex");
break;
}
p2 = gv_find_plex(sc, p->name);
if (p2 != NULL) {
/* XXX */
if (is_newer) {
p2->state = p->state;
G_VINUM_DEBUG(2, "newer plex found!");
}
g_free(p);
continue;
}
error = gv_create_plex(sc, p);
if (error)
continue;
/*
* These flags were set in gv_create_plex() and are not
* needed here (on-disk config parsing).
*/
p->flags &= ~GV_PLEX_ADDED;
} else if (!strcmp(token[0], "sd")) {
s = gv_new_sd(tokens, token);
if (s == NULL) {
G_VINUM_DEBUG(0, "config parse failed subdisk");
break;
}
s2 = gv_find_sd(sc, s->name);
if (s2 != NULL) {
/* XXX */
if (is_newer) {
s2->state = s->state;
G_VINUM_DEBUG(2, "newer subdisk found!");
}
g_free(s);
continue;
}
/*
* Signal that this subdisk was tasted, and could
* possibly reference a drive that isn't in our config
* yet.
*/
s->flags |= GV_SD_TASTED;
if (s->state == GV_SD_UP)
s->flags |= GV_SD_CANGOUP;
error = gv_create_sd(sc, s);
if (error)
continue;
/*
* This flag was set in gv_create_sd() and is not
* needed here (on-disk config parsing).
*/
s->flags &= ~GV_SD_NEWBORN;
s->flags &= ~GV_SD_GROW;
}
}
}
/*
* Format the vinum configuration properly. If ondisk is non-zero then the
* configuration is intended to be written to disk later.
*/
void
gv_format_config(struct gv_softc *sc, struct sbuf *sb, int ondisk, char *prefix)
{
struct gv_drive *d;
struct gv_sd *s;
struct gv_plex *p;
struct gv_volume *v;
/*
* We don't need the drive configuration if we're not writing the
* config to disk.
*/
if (!ondisk) {
LIST_FOREACH(d, &sc->drives, drive) {
sbuf_printf(sb, "%sdrive %s device /dev/%s\n", prefix,
d->name, d->device);
}
}
LIST_FOREACH(v, &sc->volumes, volume) {
if (!ondisk)
sbuf_printf(sb, "%s", prefix);
sbuf_printf(sb, "volume %s", v->name);
if (ondisk)
sbuf_printf(sb, " state %s", gv_volstate(v->state));
sbuf_printf(sb, "\n");
}
LIST_FOREACH(p, &sc->plexes, plex) {
if (!ondisk)
sbuf_printf(sb, "%s", prefix);
sbuf_printf(sb, "plex name %s org %s ", p->name,
gv_plexorg(p->org));
if (gv_is_striped(p))
sbuf_printf(sb, "%ds ", p->stripesize / 512);
if (p->vol_sc != NULL)
sbuf_printf(sb, "vol %s", p->volume);
if (ondisk)
sbuf_printf(sb, " state %s", gv_plexstate(p->state));
sbuf_printf(sb, "\n");
}
LIST_FOREACH(s, &sc->subdisks, sd) {
if (!ondisk)
sbuf_printf(sb, "%s", prefix);
sbuf_printf(sb, "sd name %s drive %s len %jds driveoffset "
"%jds", s->name, s->drive, s->size / 512,
s->drive_offset / 512);
if (s->plex_sc != NULL) {
sbuf_printf(sb, " plex %s plexoffset %jds", s->plex,
s->plex_offset / 512);
}
if (ondisk)
sbuf_printf(sb, " state %s", gv_sdstate(s->state));
sbuf_printf(sb, "\n");
}
}
static off_t
gv_plex_smallest_sd(struct gv_plex *p)
{
struct gv_sd *s;
off_t smallest;
KASSERT(p != NULL, ("gv_plex_smallest_sd: NULL p"));
s = LIST_FIRST(&p->subdisks);
if (s == NULL)
return (-1);
smallest = s->size;
LIST_FOREACH(s, &p->subdisks, in_plex) {
if (s->size < smallest)
smallest = s->size;
}
return (smallest);
}
/* Walk over plexes in a volume and count how many are down. */
int
gv_plexdown(struct gv_volume *v)
{
int plexdown;
struct gv_plex *p;
KASSERT(v != NULL, ("gv_plexdown: NULL v"));
plexdown = 0;
LIST_FOREACH(p, &v->plexes, plex) {
if (p->state == GV_PLEX_DOWN)
plexdown++;
}
return (plexdown);
}
int
gv_sd_to_plex(struct gv_sd *s, struct gv_plex *p)
{
struct gv_sd *s2;
off_t psizeorig, remainder, smallest;
/* If this subdisk was already given to this plex, do nothing. */
if (s->plex_sc == p)
return (0);
/* Check correct size of this subdisk. */
s2 = LIST_FIRST(&p->subdisks);
/* Adjust the subdisk-size if necessary. */
if (s2 != NULL && gv_is_striped(p)) {
/* First adjust to the stripesize. */
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);
}
smallest = gv_plex_smallest_sd(p);
/* Then take off extra if other subdisks are smaller. */
remainder = s->size - smallest;
/*
* Don't allow a remainder below zero for running plexes, it's too
* painful, and if someone were to accidentally do this, the
* resulting array might be smaller than the original... not god
*/
if (remainder < 0) {
if (!(p->flags & GV_PLEX_NEWBORN)) {
G_VINUM_DEBUG(0, "sd %s too small for plex %s!",
s->name, p->name);
return (GV_ERR_BADSIZE);
}
/* Adjust other subdisks. */
LIST_FOREACH(s2, &p->subdisks, in_plex) {
G_VINUM_DEBUG(1, "size of sd %s is to big, "
"taking off %jd bytes", s->name,
(intmax_t)remainder);
gv_adjust_freespace(s2, (remainder * -1));
}
} else if (remainder > 0) {
G_VINUM_DEBUG(1, "size of sd %s is to big, "
"taking off %jd bytes", s->name,
(intmax_t)remainder);
gv_adjust_freespace(s, remainder);
}
}
/* Find the correct plex offset for this subdisk, if needed. */
if (s->plex_offset == -1) {
/*
* First set it to 0 to catch the case where we had a detached
* subdisk that didn't get any good offset.
*/
s->plex_offset = 0;
if (p->sdcount) {
LIST_FOREACH(s2, &p->subdisks, in_plex) {
if (gv_is_striped(p))
s->plex_offset = p->sdcount *
p->stripesize;
else
s->plex_offset = s2->plex_offset +
s2->size;
}
}
}
/* There are no subdisks for this plex yet, just insert it. */
if (LIST_EMPTY(&p->subdisks)) {
LIST_INSERT_HEAD(&p->subdisks, s, in_plex);
/* Insert in correct order, depending on plex_offset. */
} else {
LIST_FOREACH(s2, &p->subdisks, in_plex) {
if (s->plex_offset < s2->plex_offset) {
LIST_INSERT_BEFORE(s2, s, in_plex);
break;
} else if (LIST_NEXT(s2, in_plex) == NULL) {
LIST_INSERT_AFTER(s2, s, in_plex);
break;
}
}
}
s->plex_sc = p;
/* Adjust the size of our plex. We check if the plex misses a subdisk,
* so we don't make the plex smaller than it actually should be.
*/
psizeorig = p->size;
p->size = gv_plex_size(p);
/* Make sure the size is not changed. */
if (p->sddetached > 0) {
if (p->size < psizeorig) {
p->size = psizeorig;
/* We make sure wee need another subdisk. */
if (p->sddetached == 1)
p->sddetached++;
}
p->sddetached--;
} else {
if ((p->org == GV_PLEX_RAID5 ||
p->org == GV_PLEX_STRIPED) &&
!(p->flags & GV_PLEX_NEWBORN) &&
p->state == GV_PLEX_UP) {
s->flags |= GV_SD_GROW;
}
p->sdcount++;
}
return (0);
}
void
gv_update_vol_size(struct gv_volume *v, off_t size)
{
if (v == NULL)
return;
if (v->provider != NULL) {
g_topology_lock();
v->provider->mediasize = size;
g_topology_unlock();
}
v->size = size;
}
/* Return how many subdisks that constitute the original plex. */
int
gv_sdcount(struct gv_plex *p, int growing)
{
struct gv_sd *s;
int sdcount;
sdcount = p->sdcount;
if (growing) {
LIST_FOREACH(s, &p->subdisks, in_plex) {
if (s->flags & GV_SD_GROW)
sdcount--;
}
}
return (sdcount);
}
/* Calculates the plex size. */
off_t
gv_plex_size(struct gv_plex *p)
{
struct gv_sd *s;
off_t size;
int sdcount;
KASSERT(p != NULL, ("gv_plex_size: NULL p"));
/* Adjust the size of our plex. */
size = 0;
sdcount = gv_sdcount(p, 1);
switch (p->org) {
case GV_PLEX_CONCAT:
LIST_FOREACH(s, &p->subdisks, in_plex)
size += s->size;
break;
case GV_PLEX_STRIPED:
s = LIST_FIRST(&p->subdisks);
size = ((s != NULL) ? (sdcount * s->size) : 0);
break;
case GV_PLEX_RAID5:
s = LIST_FIRST(&p->subdisks);
size = ((s != NULL) ? ((sdcount - 1) * s->size) : 0);
break;
}
return (size);
}
/* Returns the size of a volume. */
off_t
gv_vol_size(struct gv_volume *v)
{
struct gv_plex *p;
off_t minplexsize;
KASSERT(v != NULL, ("gv_vol_size: NULL v"));
p = LIST_FIRST(&v->plexes);
if (p == NULL)
return (0);
minplexsize = p->size;
LIST_FOREACH(p, &v->plexes, in_volume) {
if (p->size < minplexsize) {
minplexsize = p->size;
}
}
return (minplexsize);
}
void
gv_update_plex_config(struct gv_plex *p)
{
struct gv_sd *s, *s2;
off_t remainder;
int required_sds, state;
KASSERT(p != NULL, ("gv_update_plex_config: NULL p"));
/* The plex was added to an already running volume. */
if (p->flags & GV_PLEX_ADDED)
gv_set_plex_state(p, GV_PLEX_DOWN, GV_SETSTATE_FORCE);
switch (p->org) {
case GV_PLEX_STRIPED:
required_sds = 2;
break;
case GV_PLEX_RAID5:
required_sds = 3;
break;
case GV_PLEX_CONCAT:
default:
required_sds = 0;
break;
}
if (required_sds) {
if (p->sdcount < required_sds) {
gv_set_plex_state(p, GV_PLEX_DOWN, GV_SETSTATE_FORCE);
}
/*
* 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,
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, "can't give sd '%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, "couldn't 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;
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, sdcount;
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));
sdcount = p->sdcount;
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);
}
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