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freebsd-skq/sys/geom/part/g_part.c
Rui Paulo c6b2b6fce6 Add NTFS partition type to GEOM_MBR.
2010-06-26 13:20:40 +00:00

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/*-
* Copyright (c) 2002, 2005-2009 Marcel Moolenaar
* 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 THE AUTHOR ``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 AUTHOR 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/diskmbr.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/kobj.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/queue.h>
#include <sys/sbuf.h>
#include <sys/systm.h>
#include <sys/uuid.h>
#include <geom/geom.h>
#include <geom/geom_ctl.h>
#include <geom/geom_int.h>
#include <geom/part/g_part.h>
#include "g_part_if.h"
#ifndef _PATH_DEV
#define _PATH_DEV "/dev/"
#endif
static kobj_method_t g_part_null_methods[] = {
{ 0, 0 }
};
static struct g_part_scheme g_part_null_scheme = {
"(none)",
g_part_null_methods,
sizeof(struct g_part_table),
};
TAILQ_HEAD(, g_part_scheme) g_part_schemes =
TAILQ_HEAD_INITIALIZER(g_part_schemes);
struct g_part_alias_list {
const char *lexeme;
enum g_part_alias alias;
} g_part_alias_list[G_PART_ALIAS_COUNT] = {
{ "apple-boot", G_PART_ALIAS_APPLE_BOOT },
{ "apple-hfs", G_PART_ALIAS_APPLE_HFS },
{ "apple-label", G_PART_ALIAS_APPLE_LABEL },
{ "apple-raid", G_PART_ALIAS_APPLE_RAID },
{ "apple-raid-offline", G_PART_ALIAS_APPLE_RAID_OFFLINE },
{ "apple-tv-recovery", G_PART_ALIAS_APPLE_TV_RECOVERY },
{ "apple-ufs", G_PART_ALIAS_APPLE_UFS },
{ "efi", G_PART_ALIAS_EFI },
{ "freebsd", G_PART_ALIAS_FREEBSD },
{ "freebsd-boot", G_PART_ALIAS_FREEBSD_BOOT },
{ "freebsd-swap", G_PART_ALIAS_FREEBSD_SWAP },
{ "freebsd-ufs", G_PART_ALIAS_FREEBSD_UFS },
{ "freebsd-vinum", G_PART_ALIAS_FREEBSD_VINUM },
{ "freebsd-zfs", G_PART_ALIAS_FREEBSD_ZFS },
{ "linux-data", G_PART_ALIAS_LINUX_DATA },
{ "linux-lvm", G_PART_ALIAS_LINUX_LVM },
{ "linux-raid", G_PART_ALIAS_LINUX_RAID },
{ "linux-swap", G_PART_ALIAS_LINUX_SWAP },
{ "ms-basic-data", G_PART_ALIAS_MS_BASIC_DATA },
{ "ms-ldm-data", G_PART_ALIAS_MS_LDM_DATA },
{ "ms-ldm-metadata", G_PART_ALIAS_MS_LDM_METADATA },
{ "ms-reserved", G_PART_ALIAS_MS_RESERVED },
{ "ntfs", G_PART_ALIAS_MS_NTFS },
{ "netbsd-ccd", G_PART_ALIAS_NETBSD_CCD },
{ "netbsd-cgd", G_PART_ALIAS_NETBSD_CGD },
{ "netbsd-ffs", G_PART_ALIAS_NETBSD_FFS },
{ "netbsd-lfs", G_PART_ALIAS_NETBSD_LFS },
{ "netbsd-raid", G_PART_ALIAS_NETBSD_RAID },
{ "netbsd-swap", G_PART_ALIAS_NETBSD_SWAP },
{ "mbr", G_PART_ALIAS_MBR }
};
/*
* The GEOM partitioning class.
*/
static g_ctl_req_t g_part_ctlreq;
static g_ctl_destroy_geom_t g_part_destroy_geom;
static g_fini_t g_part_fini;
static g_init_t g_part_init;
static g_taste_t g_part_taste;
static g_access_t g_part_access;
static g_dumpconf_t g_part_dumpconf;
static g_orphan_t g_part_orphan;
static g_spoiled_t g_part_spoiled;
static g_start_t g_part_start;
static struct g_class g_part_class = {
.name = "PART",
.version = G_VERSION,
/* Class methods. */
.ctlreq = g_part_ctlreq,
.destroy_geom = g_part_destroy_geom,
.fini = g_part_fini,
.init = g_part_init,
.taste = g_part_taste,
/* Geom methods. */
.access = g_part_access,
.dumpconf = g_part_dumpconf,
.orphan = g_part_orphan,
.spoiled = g_part_spoiled,
.start = g_part_start,
};
DECLARE_GEOM_CLASS(g_part_class, g_part);
/*
* Support functions.
*/
static void g_part_wither(struct g_geom *, int);
const char *
g_part_alias_name(enum g_part_alias alias)
{
int i;
for (i = 0; i < G_PART_ALIAS_COUNT; i++) {
if (g_part_alias_list[i].alias != alias)
continue;
return (g_part_alias_list[i].lexeme);
}
return (NULL);
}
void
g_part_geometry_heads(off_t blocks, u_int sectors, off_t *bestchs,
u_int *bestheads)
{
static u_int candidate_heads[] = { 1, 2, 16, 32, 64, 128, 255, 0 };
off_t chs, cylinders;
u_int heads;
int idx;
*bestchs = 0;
*bestheads = 0;
for (idx = 0; candidate_heads[idx] != 0; idx++) {
heads = candidate_heads[idx];
cylinders = blocks / heads / sectors;
if (cylinders < heads || cylinders < sectors)
break;
if (cylinders > 1023)
continue;
chs = cylinders * heads * sectors;
if (chs > *bestchs || (chs == *bestchs && *bestheads == 1)) {
*bestchs = chs;
*bestheads = heads;
}
}
}
static void
g_part_geometry(struct g_part_table *table, struct g_consumer *cp,
off_t blocks)
{
static u_int candidate_sectors[] = { 1, 9, 17, 33, 63, 0 };
off_t chs, bestchs;
u_int heads, sectors;
int idx;
if (g_getattr("GEOM::fwsectors", cp, &sectors) != 0 || sectors == 0 ||
g_getattr("GEOM::fwheads", cp, &heads) != 0 || heads == 0) {
table->gpt_fixgeom = 0;
table->gpt_heads = 0;
table->gpt_sectors = 0;
bestchs = 0;
for (idx = 0; candidate_sectors[idx] != 0; idx++) {
sectors = candidate_sectors[idx];
g_part_geometry_heads(blocks, sectors, &chs, &heads);
if (chs == 0)
continue;
/*
* Prefer a geometry with sectors > 1, but only if
* it doesn't bump down the numbver of heads to 1.
*/
if (chs > bestchs || (chs == bestchs && heads > 1 &&
table->gpt_sectors == 1)) {
bestchs = chs;
table->gpt_heads = heads;
table->gpt_sectors = sectors;
}
}
/*
* If we didn't find a geometry at all, then the disk is
* too big. This means we can use the maximum number of
* heads and sectors.
*/
if (bestchs == 0) {
table->gpt_heads = 255;
table->gpt_sectors = 63;
}
} else {
table->gpt_fixgeom = 1;
table->gpt_heads = heads;
table->gpt_sectors = sectors;
}
}
struct g_part_entry *
g_part_new_entry(struct g_part_table *table, int index, quad_t start,
quad_t end)
{
struct g_part_entry *entry, *last;
last = NULL;
LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) {
if (entry->gpe_index == index)
break;
if (entry->gpe_index > index) {
entry = NULL;
break;
}
last = entry;
}
if (entry == NULL) {
entry = g_malloc(table->gpt_scheme->gps_entrysz,
M_WAITOK | M_ZERO);
entry->gpe_index = index;
if (last == NULL)
LIST_INSERT_HEAD(&table->gpt_entry, entry, gpe_entry);
else
LIST_INSERT_AFTER(last, entry, gpe_entry);
} else
entry->gpe_offset = 0;
entry->gpe_start = start;
entry->gpe_end = end;
return (entry);
}
static void
g_part_new_provider(struct g_geom *gp, struct g_part_table *table,
struct g_part_entry *entry)
{
struct g_consumer *cp;
struct g_provider *pp;
struct sbuf *sb;
off_t offset;
cp = LIST_FIRST(&gp->consumer);
pp = cp->provider;
offset = entry->gpe_start * pp->sectorsize;
if (entry->gpe_offset < offset)
entry->gpe_offset = offset;
if (entry->gpe_pp == NULL) {
sb = sbuf_new_auto();
G_PART_FULLNAME(table, entry, sb, gp->name);
sbuf_finish(sb);
entry->gpe_pp = g_new_providerf(gp, "%s", sbuf_data(sb));
sbuf_delete(sb);
entry->gpe_pp->private = entry; /* Close the circle. */
}
entry->gpe_pp->index = entry->gpe_index - 1; /* index is 1-based. */
entry->gpe_pp->mediasize = (entry->gpe_end - entry->gpe_start + 1) *
pp->sectorsize;
entry->gpe_pp->mediasize -= entry->gpe_offset - offset;
entry->gpe_pp->sectorsize = pp->sectorsize;
entry->gpe_pp->flags = pp->flags & G_PF_CANDELETE;
entry->gpe_pp->stripesize = pp->stripesize;
entry->gpe_pp->stripeoffset = pp->stripeoffset + entry->gpe_offset;
if (pp->stripesize > 0)
entry->gpe_pp->stripeoffset %= pp->stripesize;
g_error_provider(entry->gpe_pp, 0);
}
static int
g_part_parm_geom(const char *rawname, struct g_geom **v)
{
struct g_geom *gp;
const char *pname;
if (strncmp(rawname, _PATH_DEV, strlen(_PATH_DEV)) == 0)
pname = rawname + strlen(_PATH_DEV);
else
pname = rawname;
LIST_FOREACH(gp, &g_part_class.geom, geom) {
if (!strcmp(pname, gp->name))
break;
}
if (gp == NULL)
return (EINVAL);
*v = gp;
return (0);
}
static int
g_part_parm_provider(const char *pname, struct g_provider **v)
{
struct g_provider *pp;
if (strncmp(pname, _PATH_DEV, strlen(_PATH_DEV)) == 0)
pp = g_provider_by_name(pname + strlen(_PATH_DEV));
else
pp = g_provider_by_name(pname);
if (pp == NULL)
return (EINVAL);
*v = pp;
return (0);
}
static int
g_part_parm_quad(const char *p, quad_t *v)
{
char *x;
quad_t q;
q = strtoq(p, &x, 0);
if (*x != '\0' || q < 0)
return (EINVAL);
*v = q;
return (0);
}
static int
g_part_parm_scheme(const char *p, struct g_part_scheme **v)
{
struct g_part_scheme *s;
TAILQ_FOREACH(s, &g_part_schemes, scheme_list) {
if (s == &g_part_null_scheme)
continue;
if (!strcasecmp(s->name, p))
break;
}
if (s == NULL)
return (EINVAL);
*v = s;
return (0);
}
static int
g_part_parm_str(const char *p, const char **v)
{
if (p[0] == '\0')
return (EINVAL);
*v = p;
return (0);
}
static int
g_part_parm_uint(const char *p, u_int *v)
{
char *x;
long l;
l = strtol(p, &x, 0);
if (*x != '\0' || l < 0 || l > INT_MAX)
return (EINVAL);
*v = (unsigned int)l;
return (0);
}
static int
g_part_probe(struct g_geom *gp, struct g_consumer *cp, int depth)
{
struct g_part_scheme *iter, *scheme;
struct g_part_table *table;
int pri, probe;
table = gp->softc;
scheme = (table != NULL) ? table->gpt_scheme : NULL;
pri = (scheme != NULL) ? G_PART_PROBE(table, cp) : INT_MIN;
if (pri == 0)
goto done;
if (pri > 0) { /* error */
scheme = NULL;
pri = INT_MIN;
}
TAILQ_FOREACH(iter, &g_part_schemes, scheme_list) {
if (iter == &g_part_null_scheme)
continue;
table = (void *)kobj_create((kobj_class_t)iter, M_GEOM,
M_WAITOK);
table->gpt_gp = gp;
table->gpt_scheme = iter;
table->gpt_depth = depth;
probe = G_PART_PROBE(table, cp);
if (probe <= 0 && probe > pri) {
pri = probe;
scheme = iter;
if (gp->softc != NULL)
kobj_delete((kobj_t)gp->softc, M_GEOM);
gp->softc = table;
if (pri == 0)
goto done;
} else
kobj_delete((kobj_t)table, M_GEOM);
}
done:
return ((scheme == NULL) ? ENXIO : 0);
}
/*
* Control request functions.
*/
static int
g_part_ctl_add(struct gctl_req *req, struct g_part_parms *gpp)
{
struct g_geom *gp;
struct g_provider *pp;
struct g_part_entry *delent, *last, *entry;
struct g_part_table *table;
struct sbuf *sb;
quad_t end;
unsigned int index;
int error;
gp = gpp->gpp_geom;
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name));
g_topology_assert();
pp = LIST_FIRST(&gp->consumer)->provider;
table = gp->softc;
end = gpp->gpp_start + gpp->gpp_size - 1;
if (gpp->gpp_start < table->gpt_first ||
gpp->gpp_start > table->gpt_last) {
gctl_error(req, "%d start '%jd'", EINVAL,
(intmax_t)gpp->gpp_start);
return (EINVAL);
}
if (end < gpp->gpp_start || end > table->gpt_last) {
gctl_error(req, "%d size '%jd'", EINVAL,
(intmax_t)gpp->gpp_size);
return (EINVAL);
}
if (gpp->gpp_index > table->gpt_entries) {
gctl_error(req, "%d index '%d'", EINVAL, gpp->gpp_index);
return (EINVAL);
}
delent = last = NULL;
index = (gpp->gpp_index > 0) ? gpp->gpp_index : 1;
LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) {
if (entry->gpe_deleted) {
if (entry->gpe_index == index)
delent = entry;
continue;
}
if (entry->gpe_index == index)
index = entry->gpe_index + 1;
if (entry->gpe_index < index)
last = entry;
if (entry->gpe_internal)
continue;
if (gpp->gpp_start >= entry->gpe_start &&
gpp->gpp_start <= entry->gpe_end) {
gctl_error(req, "%d start '%jd'", ENOSPC,
(intmax_t)gpp->gpp_start);
return (ENOSPC);
}
if (end >= entry->gpe_start && end <= entry->gpe_end) {
gctl_error(req, "%d end '%jd'", ENOSPC, (intmax_t)end);
return (ENOSPC);
}
if (gpp->gpp_start < entry->gpe_start && end > entry->gpe_end) {
gctl_error(req, "%d size '%jd'", ENOSPC,
(intmax_t)gpp->gpp_size);
return (ENOSPC);
}
}
if (gpp->gpp_index > 0 && index != gpp->gpp_index) {
gctl_error(req, "%d index '%d'", EEXIST, gpp->gpp_index);
return (EEXIST);
}
if (index > table->gpt_entries) {
gctl_error(req, "%d index '%d'", ENOSPC, index);
return (ENOSPC);
}
entry = (delent == NULL) ? g_malloc(table->gpt_scheme->gps_entrysz,
M_WAITOK | M_ZERO) : delent;
entry->gpe_index = index;
entry->gpe_start = gpp->gpp_start;
entry->gpe_end = end;
error = G_PART_ADD(table, entry, gpp);
if (error) {
gctl_error(req, "%d", error);
if (delent == NULL)
g_free(entry);
return (error);
}
if (delent == NULL) {
if (last == NULL)
LIST_INSERT_HEAD(&table->gpt_entry, entry, gpe_entry);
else
LIST_INSERT_AFTER(last, entry, gpe_entry);
entry->gpe_created = 1;
} else {
entry->gpe_deleted = 0;
entry->gpe_modified = 1;
}
g_part_new_provider(gp, table, entry);
/* Provide feedback if so requested. */
if (gpp->gpp_parms & G_PART_PARM_OUTPUT) {
sb = sbuf_new_auto();
G_PART_FULLNAME(table, entry, sb, gp->name);
sbuf_cat(sb, " added\n");
sbuf_finish(sb);
gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1);
sbuf_delete(sb);
}
return (0);
}
static int
g_part_ctl_bootcode(struct gctl_req *req, struct g_part_parms *gpp)
{
struct g_geom *gp;
struct g_part_table *table;
struct sbuf *sb;
int error, sz;
gp = gpp->gpp_geom;
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name));
g_topology_assert();
table = gp->softc;
sz = table->gpt_scheme->gps_bootcodesz;
if (sz == 0) {
error = ENODEV;
goto fail;
}
if (gpp->gpp_codesize > sz) {
error = EFBIG;
goto fail;
}
error = G_PART_BOOTCODE(table, gpp);
if (error)
goto fail;
/* Provide feedback if so requested. */
if (gpp->gpp_parms & G_PART_PARM_OUTPUT) {
sb = sbuf_new_auto();
sbuf_printf(sb, "%s has bootcode\n", gp->name);
sbuf_finish(sb);
gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1);
sbuf_delete(sb);
}
return (0);
fail:
gctl_error(req, "%d", error);
return (error);
}
static int
g_part_ctl_commit(struct gctl_req *req, struct g_part_parms *gpp)
{
struct g_consumer *cp;
struct g_geom *gp;
struct g_provider *pp;
struct g_part_entry *entry, *tmp;
struct g_part_table *table;
char *buf;
int error, i;
gp = gpp->gpp_geom;
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name));
g_topology_assert();
table = gp->softc;
if (!table->gpt_opened) {
gctl_error(req, "%d", EPERM);
return (EPERM);
}
g_topology_unlock();
cp = LIST_FIRST(&gp->consumer);
if ((table->gpt_smhead | table->gpt_smtail) != 0) {
pp = cp->provider;
buf = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO);
while (table->gpt_smhead != 0) {
i = ffs(table->gpt_smhead) - 1;
error = g_write_data(cp, i * pp->sectorsize, buf,
pp->sectorsize);
if (error) {
g_free(buf);
goto fail;
}
table->gpt_smhead &= ~(1 << i);
}
while (table->gpt_smtail != 0) {
i = ffs(table->gpt_smtail) - 1;
error = g_write_data(cp, pp->mediasize - (i + 1) *
pp->sectorsize, buf, pp->sectorsize);
if (error) {
g_free(buf);
goto fail;
}
table->gpt_smtail &= ~(1 << i);
}
g_free(buf);
}
if (table->gpt_scheme == &g_part_null_scheme) {
g_topology_lock();
g_access(cp, -1, -1, -1);
g_part_wither(gp, ENXIO);
return (0);
}
error = G_PART_WRITE(table, cp);
if (error)
goto fail;
LIST_FOREACH_SAFE(entry, &table->gpt_entry, gpe_entry, tmp) {
if (!entry->gpe_deleted) {
entry->gpe_created = 0;
entry->gpe_modified = 0;
continue;
}
LIST_REMOVE(entry, gpe_entry);
g_free(entry);
}
table->gpt_created = 0;
table->gpt_opened = 0;
g_topology_lock();
g_access(cp, -1, -1, -1);
return (0);
fail:
g_topology_lock();
gctl_error(req, "%d", error);
return (error);
}
static int
g_part_ctl_create(struct gctl_req *req, struct g_part_parms *gpp)
{
struct g_consumer *cp;
struct g_geom *gp;
struct g_provider *pp;
struct g_part_scheme *scheme;
struct g_part_table *null, *table;
struct sbuf *sb;
int attr, error;
pp = gpp->gpp_provider;
scheme = gpp->gpp_scheme;
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, pp->name));
g_topology_assert();
/* Check that there isn't already a g_part geom on the provider. */
error = g_part_parm_geom(pp->name, &gp);
if (!error) {
null = gp->softc;
if (null->gpt_scheme != &g_part_null_scheme) {
gctl_error(req, "%d geom '%s'", EEXIST, pp->name);
return (EEXIST);
}
} else
null = NULL;
if ((gpp->gpp_parms & G_PART_PARM_ENTRIES) &&
(gpp->gpp_entries < scheme->gps_minent ||
gpp->gpp_entries > scheme->gps_maxent)) {
gctl_error(req, "%d entries '%d'", EINVAL, gpp->gpp_entries);
return (EINVAL);
}
if (null == NULL)
gp = g_new_geomf(&g_part_class, "%s", pp->name);
gp->softc = kobj_create((kobj_class_t)gpp->gpp_scheme, M_GEOM,
M_WAITOK);
table = gp->softc;
table->gpt_gp = gp;
table->gpt_scheme = gpp->gpp_scheme;
table->gpt_entries = (gpp->gpp_parms & G_PART_PARM_ENTRIES) ?
gpp->gpp_entries : scheme->gps_minent;
LIST_INIT(&table->gpt_entry);
if (null == NULL) {
cp = g_new_consumer(gp);
error = g_attach(cp, pp);
if (error == 0)
error = g_access(cp, 1, 1, 1);
if (error != 0) {
g_part_wither(gp, error);
gctl_error(req, "%d geom '%s'", error, pp->name);
return (error);
}
table->gpt_opened = 1;
} else {
cp = LIST_FIRST(&gp->consumer);
table->gpt_opened = null->gpt_opened;
table->gpt_smhead = null->gpt_smhead;
table->gpt_smtail = null->gpt_smtail;
}
g_topology_unlock();
/* Make sure the provider has media. */
if (pp->mediasize == 0 || pp->sectorsize == 0) {
error = ENODEV;
goto fail;
}
/* Make sure we can nest and if so, determine our depth. */
error = g_getattr("PART::isleaf", cp, &attr);
if (!error && attr) {
error = ENODEV;
goto fail;
}
error = g_getattr("PART::depth", cp, &attr);
table->gpt_depth = (!error) ? attr + 1 : 0;
/*
* Synthesize a disk geometry. Some partitioning schemes
* depend on it and since some file systems need it even
* when the partitition scheme doesn't, we do it here in
* scheme-independent code.
*/
g_part_geometry(table, cp, pp->mediasize / pp->sectorsize);
error = G_PART_CREATE(table, gpp);
if (error)
goto fail;
g_topology_lock();
table->gpt_created = 1;
if (null != NULL)
kobj_delete((kobj_t)null, M_GEOM);
/*
* Support automatic commit by filling in the gpp_geom
* parameter.
*/
gpp->gpp_parms |= G_PART_PARM_GEOM;
gpp->gpp_geom = gp;
/* Provide feedback if so requested. */
if (gpp->gpp_parms & G_PART_PARM_OUTPUT) {
sb = sbuf_new_auto();
sbuf_printf(sb, "%s created\n", gp->name);
sbuf_finish(sb);
gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1);
sbuf_delete(sb);
}
return (0);
fail:
g_topology_lock();
if (null == NULL) {
g_access(cp, -1, -1, -1);
g_part_wither(gp, error);
} else {
kobj_delete((kobj_t)gp->softc, M_GEOM);
gp->softc = null;
}
gctl_error(req, "%d provider", error);
return (error);
}
static int
g_part_ctl_delete(struct gctl_req *req, struct g_part_parms *gpp)
{
struct g_geom *gp;
struct g_provider *pp;
struct g_part_entry *entry;
struct g_part_table *table;
struct sbuf *sb;
gp = gpp->gpp_geom;
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name));
g_topology_assert();
table = gp->softc;
LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) {
if (entry->gpe_deleted || entry->gpe_internal)
continue;
if (entry->gpe_index == gpp->gpp_index)
break;
}
if (entry == NULL) {
gctl_error(req, "%d index '%d'", ENOENT, gpp->gpp_index);
return (ENOENT);
}
pp = entry->gpe_pp;
if (pp != NULL) {
if (pp->acr > 0 || pp->acw > 0 || pp->ace > 0) {
gctl_error(req, "%d", EBUSY);
return (EBUSY);
}
pp->private = NULL;
entry->gpe_pp = NULL;
}
if (entry->gpe_created) {
LIST_REMOVE(entry, gpe_entry);
g_free(entry);
} else {
entry->gpe_modified = 0;
entry->gpe_deleted = 1;
}
if (pp != NULL)
g_wither_provider(pp, ENXIO);
/* Provide feedback if so requested. */
if (gpp->gpp_parms & G_PART_PARM_OUTPUT) {
sb = sbuf_new_auto();
G_PART_FULLNAME(table, entry, sb, gp->name);
sbuf_cat(sb, " deleted\n");
sbuf_finish(sb);
gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1);
sbuf_delete(sb);
}
return (0);
}
static int
g_part_ctl_destroy(struct gctl_req *req, struct g_part_parms *gpp)
{
struct g_consumer *cp;
struct g_geom *gp;
struct g_provider *pp;
struct g_part_entry *entry;
struct g_part_table *null, *table;
struct sbuf *sb;
int error;
gp = gpp->gpp_geom;
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name));
g_topology_assert();
table = gp->softc;
LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) {
if (entry->gpe_deleted || entry->gpe_internal)
continue;
gctl_error(req, "%d", EBUSY);
return (EBUSY);
}
error = G_PART_DESTROY(table, gpp);
if (error) {
gctl_error(req, "%d", error);
return (error);
}
gp->softc = kobj_create((kobj_class_t)&g_part_null_scheme, M_GEOM,
M_WAITOK);
null = gp->softc;
null->gpt_gp = gp;
null->gpt_scheme = &g_part_null_scheme;
LIST_INIT(&null->gpt_entry);
cp = LIST_FIRST(&gp->consumer);
pp = cp->provider;
null->gpt_last = pp->mediasize / pp->sectorsize - 1;
null->gpt_depth = table->gpt_depth;
null->gpt_opened = table->gpt_opened;
null->gpt_smhead = table->gpt_smhead;
null->gpt_smtail = table->gpt_smtail;
while ((entry = LIST_FIRST(&table->gpt_entry)) != NULL) {
LIST_REMOVE(entry, gpe_entry);
g_free(entry);
}
kobj_delete((kobj_t)table, M_GEOM);
/* Provide feedback if so requested. */
if (gpp->gpp_parms & G_PART_PARM_OUTPUT) {
sb = sbuf_new_auto();
sbuf_printf(sb, "%s destroyed\n", gp->name);
sbuf_finish(sb);
gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1);
sbuf_delete(sb);
}
return (0);
}
static int
g_part_ctl_modify(struct gctl_req *req, struct g_part_parms *gpp)
{
struct g_geom *gp;
struct g_part_entry *entry;
struct g_part_table *table;
struct sbuf *sb;
int error;
gp = gpp->gpp_geom;
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name));
g_topology_assert();
table = gp->softc;
LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) {
if (entry->gpe_deleted || entry->gpe_internal)
continue;
if (entry->gpe_index == gpp->gpp_index)
break;
}
if (entry == NULL) {
gctl_error(req, "%d index '%d'", ENOENT, gpp->gpp_index);
return (ENOENT);
}
error = G_PART_MODIFY(table, entry, gpp);
if (error) {
gctl_error(req, "%d", error);
return (error);
}
if (!entry->gpe_created)
entry->gpe_modified = 1;
/* Provide feedback if so requested. */
if (gpp->gpp_parms & G_PART_PARM_OUTPUT) {
sb = sbuf_new_auto();
G_PART_FULLNAME(table, entry, sb, gp->name);
sbuf_cat(sb, " modified\n");
sbuf_finish(sb);
gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1);
sbuf_delete(sb);
}
return (0);
}
static int
g_part_ctl_move(struct gctl_req *req, struct g_part_parms *gpp)
{
gctl_error(req, "%d verb 'move'", ENOSYS);
return (ENOSYS);
}
static int
g_part_ctl_recover(struct gctl_req *req, struct g_part_parms *gpp)
{
gctl_error(req, "%d verb 'recover'", ENOSYS);
return (ENOSYS);
}
static int
g_part_ctl_resize(struct gctl_req *req, struct g_part_parms *gpp)
{
struct g_geom *gp;
struct g_provider *pp;
struct g_part_entry *pe, *entry;
struct g_part_table *table;
struct sbuf *sb;
quad_t end;
int error;
gp = gpp->gpp_geom;
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name));
g_topology_assert();
table = gp->softc;
/* check gpp_index */
LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) {
if (entry->gpe_deleted || entry->gpe_internal)
continue;
if (entry->gpe_index == gpp->gpp_index)
break;
}
if (entry == NULL) {
gctl_error(req, "%d index '%d'", ENOENT, gpp->gpp_index);
return (ENOENT);
}
/* check gpp_size */
end = entry->gpe_start + gpp->gpp_size - 1;
if (gpp->gpp_size < 1 || end > table->gpt_last) {
gctl_error(req, "%d size '%jd'", EINVAL,
(intmax_t)gpp->gpp_size);
return (EINVAL);
}
LIST_FOREACH(pe, &table->gpt_entry, gpe_entry) {
if (pe->gpe_deleted || pe->gpe_internal || pe == entry)
continue;
if (end >= pe->gpe_start && end <= pe->gpe_end) {
gctl_error(req, "%d end '%jd'", ENOSPC,
(intmax_t)end);
return (ENOSPC);
}
if (entry->gpe_start < pe->gpe_start && end > pe->gpe_end) {
gctl_error(req, "%d size '%jd'", ENOSPC,
(intmax_t)gpp->gpp_size);
return (ENOSPC);
}
}
pp = entry->gpe_pp;
if ((g_debugflags & 16) == 0 &&
(pp->acr > 0 || pp->acw > 0 || pp->ace > 0)) {
gctl_error(req, "%d", EBUSY);
return (EBUSY);
}
error = G_PART_RESIZE(table, entry, gpp);
if (error) {
gctl_error(req, "%d", error);
return (error);
}
if (!entry->gpe_created)
entry->gpe_modified = 1;
/* update mediasize of changed provider */
pp->mediasize = (entry->gpe_end - entry->gpe_start + 1) *
pp->sectorsize;
/* Provide feedback if so requested. */
if (gpp->gpp_parms & G_PART_PARM_OUTPUT) {
sb = sbuf_new_auto();
G_PART_FULLNAME(table, entry, sb, gp->name);
sbuf_cat(sb, " resized\n");
sbuf_finish(sb);
gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1);
sbuf_delete(sb);
}
return (0);
}
static int
g_part_ctl_setunset(struct gctl_req *req, struct g_part_parms *gpp,
unsigned int set)
{
struct g_geom *gp;
struct g_part_entry *entry;
struct g_part_table *table;
struct sbuf *sb;
int error;
gp = gpp->gpp_geom;
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name));
g_topology_assert();
table = gp->softc;
LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) {
if (entry->gpe_deleted || entry->gpe_internal)
continue;
if (entry->gpe_index == gpp->gpp_index)
break;
}
if (entry == NULL) {
gctl_error(req, "%d index '%d'", ENOENT, gpp->gpp_index);
return (ENOENT);
}
error = G_PART_SETUNSET(table, entry, gpp->gpp_attrib, set);
if (error) {
gctl_error(req, "%d attrib '%s'", error, gpp->gpp_attrib);
return (error);
}
/* Provide feedback if so requested. */
if (gpp->gpp_parms & G_PART_PARM_OUTPUT) {
sb = sbuf_new_auto();
G_PART_FULLNAME(table, entry, sb, gp->name);
sbuf_printf(sb, " has %s %sset\n", gpp->gpp_attrib,
(set) ? "" : "un");
sbuf_finish(sb);
gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1);
sbuf_delete(sb);
}
return (0);
}
static int
g_part_ctl_undo(struct gctl_req *req, struct g_part_parms *gpp)
{
struct g_consumer *cp;
struct g_provider *pp;
struct g_geom *gp;
struct g_part_entry *entry, *tmp;
struct g_part_table *table;
int error, reprobe;
gp = gpp->gpp_geom;
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name));
g_topology_assert();
table = gp->softc;
if (!table->gpt_opened) {
gctl_error(req, "%d", EPERM);
return (EPERM);
}
cp = LIST_FIRST(&gp->consumer);
LIST_FOREACH_SAFE(entry, &table->gpt_entry, gpe_entry, tmp) {
entry->gpe_modified = 0;
if (entry->gpe_created) {
pp = entry->gpe_pp;
if (pp != NULL) {
pp->private = NULL;
entry->gpe_pp = NULL;
g_wither_provider(pp, ENXIO);
}
entry->gpe_deleted = 1;
}
if (entry->gpe_deleted) {
LIST_REMOVE(entry, gpe_entry);
g_free(entry);
}
}
g_topology_unlock();
reprobe = (table->gpt_scheme == &g_part_null_scheme ||
table->gpt_created) ? 1 : 0;
if (reprobe) {
LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) {
if (entry->gpe_internal)
continue;
error = EBUSY;
goto fail;
}
while ((entry = LIST_FIRST(&table->gpt_entry)) != NULL) {
LIST_REMOVE(entry, gpe_entry);
g_free(entry);
}
error = g_part_probe(gp, cp, table->gpt_depth);
if (error) {
g_topology_lock();
g_access(cp, -1, -1, -1);
g_part_wither(gp, error);
return (0);
}
table = gp->softc;
/*
* Synthesize a disk geometry. Some partitioning schemes
* depend on it and since some file systems need it even
* when the partitition scheme doesn't, we do it here in
* scheme-independent code.
*/
pp = cp->provider;
g_part_geometry(table, cp, pp->mediasize / pp->sectorsize);
}
error = G_PART_READ(table, cp);
if (error)
goto fail;
g_topology_lock();
LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) {
if (!entry->gpe_internal)
g_part_new_provider(gp, table, entry);
}
table->gpt_opened = 0;
g_access(cp, -1, -1, -1);
return (0);
fail:
g_topology_lock();
gctl_error(req, "%d", error);
return (error);
}
static void
g_part_wither(struct g_geom *gp, int error)
{
struct g_part_entry *entry;
struct g_part_table *table;
table = gp->softc;
if (table != NULL) {
while ((entry = LIST_FIRST(&table->gpt_entry)) != NULL) {
LIST_REMOVE(entry, gpe_entry);
g_free(entry);
}
if (gp->softc != NULL) {
kobj_delete((kobj_t)gp->softc, M_GEOM);
gp->softc = NULL;
}
}
g_wither_geom(gp, error);
}
/*
* Class methods.
*/
static void
g_part_ctlreq(struct gctl_req *req, struct g_class *mp, const char *verb)
{
struct g_part_parms gpp;
struct g_part_table *table;
struct gctl_req_arg *ap;
const char *p;
enum g_part_ctl ctlreq;
unsigned int i, mparms, oparms, parm;
int auto_commit, close_on_error;
int error, len, modifies;
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s,%s)", __func__, mp->name, verb));
g_topology_assert();
ctlreq = G_PART_CTL_NONE;
modifies = 1;
mparms = 0;
oparms = G_PART_PARM_FLAGS | G_PART_PARM_OUTPUT | G_PART_PARM_VERSION;
switch (*verb) {
case 'a':
if (!strcmp(verb, "add")) {
ctlreq = G_PART_CTL_ADD;
mparms |= G_PART_PARM_GEOM | G_PART_PARM_SIZE |
G_PART_PARM_START | G_PART_PARM_TYPE;
oparms |= G_PART_PARM_INDEX | G_PART_PARM_LABEL;
}
break;
case 'b':
if (!strcmp(verb, "bootcode")) {
ctlreq = G_PART_CTL_BOOTCODE;
mparms |= G_PART_PARM_GEOM | G_PART_PARM_BOOTCODE;
}
break;
case 'c':
if (!strcmp(verb, "commit")) {
ctlreq = G_PART_CTL_COMMIT;
mparms |= G_PART_PARM_GEOM;
modifies = 0;
} else if (!strcmp(verb, "create")) {
ctlreq = G_PART_CTL_CREATE;
mparms |= G_PART_PARM_PROVIDER | G_PART_PARM_SCHEME;
oparms |= G_PART_PARM_ENTRIES;
}
break;
case 'd':
if (!strcmp(verb, "delete")) {
ctlreq = G_PART_CTL_DELETE;
mparms |= G_PART_PARM_GEOM | G_PART_PARM_INDEX;
} else if (!strcmp(verb, "destroy")) {
ctlreq = G_PART_CTL_DESTROY;
mparms |= G_PART_PARM_GEOM;
}
break;
case 'm':
if (!strcmp(verb, "modify")) {
ctlreq = G_PART_CTL_MODIFY;
mparms |= G_PART_PARM_GEOM | G_PART_PARM_INDEX;
oparms |= G_PART_PARM_LABEL | G_PART_PARM_TYPE;
} else if (!strcmp(verb, "move")) {
ctlreq = G_PART_CTL_MOVE;
mparms |= G_PART_PARM_GEOM | G_PART_PARM_INDEX;
}
break;
case 'r':
if (!strcmp(verb, "recover")) {
ctlreq = G_PART_CTL_RECOVER;
mparms |= G_PART_PARM_GEOM;
} else if (!strcmp(verb, "resize")) {
ctlreq = G_PART_CTL_RESIZE;
mparms |= G_PART_PARM_GEOM | G_PART_PARM_INDEX |
G_PART_PARM_SIZE;
}
break;
case 's':
if (!strcmp(verb, "set")) {
ctlreq = G_PART_CTL_SET;
mparms |= G_PART_PARM_ATTRIB | G_PART_PARM_GEOM |
G_PART_PARM_INDEX;
}
break;
case 'u':
if (!strcmp(verb, "undo")) {
ctlreq = G_PART_CTL_UNDO;
mparms |= G_PART_PARM_GEOM;
modifies = 0;
} else if (!strcmp(verb, "unset")) {
ctlreq = G_PART_CTL_UNSET;
mparms |= G_PART_PARM_ATTRIB | G_PART_PARM_GEOM |
G_PART_PARM_INDEX;
}
break;
}
if (ctlreq == G_PART_CTL_NONE) {
gctl_error(req, "%d verb '%s'", EINVAL, verb);
return;
}
bzero(&gpp, sizeof(gpp));
for (i = 0; i < req->narg; i++) {
ap = &req->arg[i];
parm = 0;
switch (ap->name[0]) {
case 'a':
if (!strcmp(ap->name, "attrib"))
parm = G_PART_PARM_ATTRIB;
break;
case 'b':
if (!strcmp(ap->name, "bootcode"))
parm = G_PART_PARM_BOOTCODE;
break;
case 'c':
if (!strcmp(ap->name, "class"))
continue;
break;
case 'e':
if (!strcmp(ap->name, "entries"))
parm = G_PART_PARM_ENTRIES;
break;
case 'f':
if (!strcmp(ap->name, "flags"))
parm = G_PART_PARM_FLAGS;
break;
case 'g':
if (!strcmp(ap->name, "geom"))
parm = G_PART_PARM_GEOM;
break;
case 'i':
if (!strcmp(ap->name, "index"))
parm = G_PART_PARM_INDEX;
break;
case 'l':
if (!strcmp(ap->name, "label"))
parm = G_PART_PARM_LABEL;
break;
case 'o':
if (!strcmp(ap->name, "output"))
parm = G_PART_PARM_OUTPUT;
break;
case 'p':
if (!strcmp(ap->name, "provider"))
parm = G_PART_PARM_PROVIDER;
break;
case 's':
if (!strcmp(ap->name, "scheme"))
parm = G_PART_PARM_SCHEME;
else if (!strcmp(ap->name, "size"))
parm = G_PART_PARM_SIZE;
else if (!strcmp(ap->name, "start"))
parm = G_PART_PARM_START;
break;
case 't':
if (!strcmp(ap->name, "type"))
parm = G_PART_PARM_TYPE;
break;
case 'v':
if (!strcmp(ap->name, "verb"))
continue;
else if (!strcmp(ap->name, "version"))
parm = G_PART_PARM_VERSION;
break;
}
if ((parm & (mparms | oparms)) == 0) {
gctl_error(req, "%d param '%s'", EINVAL, ap->name);
return;
}
if (parm == G_PART_PARM_BOOTCODE)
p = gctl_get_param(req, ap->name, &len);
else
p = gctl_get_asciiparam(req, ap->name);
if (p == NULL) {
gctl_error(req, "%d param '%s'", ENOATTR, ap->name);
return;
}
switch (parm) {
case G_PART_PARM_ATTRIB:
error = g_part_parm_str(p, &gpp.gpp_attrib);
break;
case G_PART_PARM_BOOTCODE:
gpp.gpp_codeptr = p;
gpp.gpp_codesize = len;
error = 0;
break;
case G_PART_PARM_ENTRIES:
error = g_part_parm_uint(p, &gpp.gpp_entries);
break;
case G_PART_PARM_FLAGS:
if (p[0] == '\0')
continue;
error = g_part_parm_str(p, &gpp.gpp_flags);
break;
case G_PART_PARM_GEOM:
error = g_part_parm_geom(p, &gpp.gpp_geom);
break;
case G_PART_PARM_INDEX:
error = g_part_parm_uint(p, &gpp.gpp_index);
break;
case G_PART_PARM_LABEL:
/* An empty label is always valid. */
gpp.gpp_label = p;
error = 0;
break;
case G_PART_PARM_OUTPUT:
error = 0; /* Write-only parameter */
break;
case G_PART_PARM_PROVIDER:
error = g_part_parm_provider(p, &gpp.gpp_provider);
break;
case G_PART_PARM_SCHEME:
error = g_part_parm_scheme(p, &gpp.gpp_scheme);
break;
case G_PART_PARM_SIZE:
error = g_part_parm_quad(p, &gpp.gpp_size);
break;
case G_PART_PARM_START:
error = g_part_parm_quad(p, &gpp.gpp_start);
break;
case G_PART_PARM_TYPE:
error = g_part_parm_str(p, &gpp.gpp_type);
break;
case G_PART_PARM_VERSION:
error = g_part_parm_uint(p, &gpp.gpp_version);
break;
default:
error = EDOOFUS;
break;
}
if (error) {
gctl_error(req, "%d %s '%s'", error, ap->name, p);
return;
}
gpp.gpp_parms |= parm;
}
if ((gpp.gpp_parms & mparms) != mparms) {
parm = mparms - (gpp.gpp_parms & mparms);
gctl_error(req, "%d param '%x'", ENOATTR, parm);
return;
}
/* Obtain permissions if possible/necessary. */
close_on_error = 0;
table = NULL;
if (modifies && (gpp.gpp_parms & G_PART_PARM_GEOM)) {
table = gpp.gpp_geom->softc;
if (table != NULL && !table->gpt_opened) {
error = g_access(LIST_FIRST(&gpp.gpp_geom->consumer),
1, 1, 1);
if (error) {
gctl_error(req, "%d geom '%s'", error,
gpp.gpp_geom->name);
return;
}
table->gpt_opened = 1;
close_on_error = 1;
}
}
/* Allow the scheme to check or modify the parameters. */
if (table != NULL) {
error = G_PART_PRECHECK(table, ctlreq, &gpp);
if (error) {
gctl_error(req, "%d pre-check failed", error);
goto out;
}
} else
error = EDOOFUS; /* Prevent bogus uninit. warning. */
switch (ctlreq) {
case G_PART_CTL_NONE:
panic("%s", __func__);
case G_PART_CTL_ADD:
error = g_part_ctl_add(req, &gpp);
break;
case G_PART_CTL_BOOTCODE:
error = g_part_ctl_bootcode(req, &gpp);
break;
case G_PART_CTL_COMMIT:
error = g_part_ctl_commit(req, &gpp);
break;
case G_PART_CTL_CREATE:
error = g_part_ctl_create(req, &gpp);
break;
case G_PART_CTL_DELETE:
error = g_part_ctl_delete(req, &gpp);
break;
case G_PART_CTL_DESTROY:
error = g_part_ctl_destroy(req, &gpp);
break;
case G_PART_CTL_MODIFY:
error = g_part_ctl_modify(req, &gpp);
break;
case G_PART_CTL_MOVE:
error = g_part_ctl_move(req, &gpp);
break;
case G_PART_CTL_RECOVER:
error = g_part_ctl_recover(req, &gpp);
break;
case G_PART_CTL_RESIZE:
error = g_part_ctl_resize(req, &gpp);
break;
case G_PART_CTL_SET:
error = g_part_ctl_setunset(req, &gpp, 1);
break;
case G_PART_CTL_UNDO:
error = g_part_ctl_undo(req, &gpp);
break;
case G_PART_CTL_UNSET:
error = g_part_ctl_setunset(req, &gpp, 0);
break;
}
/* Implement automatic commit. */
if (!error) {
auto_commit = (modifies &&
(gpp.gpp_parms & G_PART_PARM_FLAGS) &&
strchr(gpp.gpp_flags, 'C') != NULL) ? 1 : 0;
if (auto_commit) {
KASSERT(gpp.gpp_parms & G_PART_PARM_GEOM, (__func__));
error = g_part_ctl_commit(req, &gpp);
}
}
out:
if (error && close_on_error) {
g_access(LIST_FIRST(&gpp.gpp_geom->consumer), -1, -1, -1);
table->gpt_opened = 0;
}
}
static int
g_part_destroy_geom(struct gctl_req *req, struct g_class *mp,
struct g_geom *gp)
{
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s,%s)", __func__, mp->name, gp->name));
g_topology_assert();
g_part_wither(gp, EINVAL);
return (0);
}
static struct g_geom *
g_part_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
{
struct g_consumer *cp;
struct g_geom *gp;
struct g_part_entry *entry;
struct g_part_table *table;
struct root_hold_token *rht;
int attr, depth;
int error;
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s,%s)", __func__, mp->name, pp->name));
g_topology_assert();
/* Skip providers that are already open for writing. */
if (pp->acw > 0)
return (NULL);
/*
* Create a GEOM with consumer and hook it up to the provider.
* With that we become part of the topology. Optain read access
* to the provider.
*/
gp = g_new_geomf(mp, "%s", pp->name);
cp = g_new_consumer(gp);
error = g_attach(cp, pp);
if (error == 0)
error = g_access(cp, 1, 0, 0);
if (error != 0) {
g_part_wither(gp, error);
return (NULL);
}
rht = root_mount_hold(mp->name);
g_topology_unlock();
/*
* Short-circuit the whole probing galore when there's no
* media present.
*/
if (pp->mediasize == 0 || pp->sectorsize == 0) {
error = ENODEV;
goto fail;
}
/* Make sure we can nest and if so, determine our depth. */
error = g_getattr("PART::isleaf", cp, &attr);
if (!error && attr) {
error = ENODEV;
goto fail;
}
error = g_getattr("PART::depth", cp, &attr);
depth = (!error) ? attr + 1 : 0;
error = g_part_probe(gp, cp, depth);
if (error)
goto fail;
table = gp->softc;
/*
* Synthesize a disk geometry. Some partitioning schemes
* depend on it and since some file systems need it even
* when the partitition scheme doesn't, we do it here in
* scheme-independent code.
*/
g_part_geometry(table, cp, pp->mediasize / pp->sectorsize);
error = G_PART_READ(table, cp);
if (error)
goto fail;
g_topology_lock();
LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) {
if (!entry->gpe_internal)
g_part_new_provider(gp, table, entry);
}
root_mount_rel(rht);
g_access(cp, -1, 0, 0);
return (gp);
fail:
g_topology_lock();
root_mount_rel(rht);
g_access(cp, -1, 0, 0);
g_part_wither(gp, error);
return (NULL);
}
/*
* Geom methods.
*/
static int
g_part_access(struct g_provider *pp, int dr, int dw, int de)
{
struct g_consumer *cp;
G_PART_TRACE((G_T_ACCESS, "%s(%s,%d,%d,%d)", __func__, pp->name, dr,
dw, de));
cp = LIST_FIRST(&pp->geom->consumer);
/* We always gain write-exclusive access. */
return (g_access(cp, dr, dw, dw + de));
}
static void
g_part_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
struct g_consumer *cp, struct g_provider *pp)
{
char buf[64];
struct g_part_entry *entry;
struct g_part_table *table;
KASSERT(sb != NULL && gp != NULL, (__func__));
table = gp->softc;
if (indent == NULL) {
KASSERT(cp == NULL && pp != NULL, (__func__));
entry = pp->private;
if (entry == NULL)
return;
sbuf_printf(sb, " i %u o %ju ty %s", entry->gpe_index,
(uintmax_t)entry->gpe_offset,
G_PART_TYPE(table, entry, buf, sizeof(buf)));
/*
* libdisk compatibility quirk - the scheme dumps the
* slicer name and partition type in a way that is
* compatible with libdisk. When libdisk is not used
* anymore, this should go away.
*/
G_PART_DUMPCONF(table, entry, sb, indent);
} else if (cp != NULL) { /* Consumer configuration. */
KASSERT(pp == NULL, (__func__));
/* none */
} else if (pp != NULL) { /* Provider configuration. */
entry = pp->private;
if (entry == NULL)
return;
sbuf_printf(sb, "%s<start>%ju</start>\n", indent,
(uintmax_t)entry->gpe_start);
sbuf_printf(sb, "%s<end>%ju</end>\n", indent,
(uintmax_t)entry->gpe_end);
sbuf_printf(sb, "%s<index>%u</index>\n", indent,
entry->gpe_index);
sbuf_printf(sb, "%s<type>%s</type>\n", indent,
G_PART_TYPE(table, entry, buf, sizeof(buf)));
sbuf_printf(sb, "%s<offset>%ju</offset>\n", indent,
(uintmax_t)entry->gpe_offset);
sbuf_printf(sb, "%s<length>%ju</length>\n", indent,
(uintmax_t)pp->mediasize);
G_PART_DUMPCONF(table, entry, sb, indent);
} else { /* Geom configuration. */
sbuf_printf(sb, "%s<scheme>%s</scheme>\n", indent,
table->gpt_scheme->name);
sbuf_printf(sb, "%s<entries>%u</entries>\n", indent,
table->gpt_entries);
sbuf_printf(sb, "%s<first>%ju</first>\n", indent,
(uintmax_t)table->gpt_first);
sbuf_printf(sb, "%s<last>%ju</last>\n", indent,
(uintmax_t)table->gpt_last);
sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", indent,
table->gpt_sectors);
sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", indent,
table->gpt_heads);
G_PART_DUMPCONF(table, NULL, sb, indent);
}
}
static void
g_part_orphan(struct g_consumer *cp)
{
struct g_provider *pp;
pp = cp->provider;
KASSERT(pp != NULL, (__func__));
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, pp->name));
g_topology_assert();
KASSERT(pp->error != 0, (__func__));
g_part_wither(cp->geom, pp->error);
}
static void
g_part_spoiled(struct g_consumer *cp)
{
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, cp->provider->name));
g_topology_assert();
g_part_wither(cp->geom, ENXIO);
}
static void
g_part_start(struct bio *bp)
{
struct bio *bp2;
struct g_consumer *cp;
struct g_geom *gp;
struct g_part_entry *entry;
struct g_part_table *table;
struct g_kerneldump *gkd;
struct g_provider *pp;
pp = bp->bio_to;
gp = pp->geom;
table = gp->softc;
cp = LIST_FIRST(&gp->consumer);
G_PART_TRACE((G_T_BIO, "%s: cmd=%d, provider=%s", __func__, bp->bio_cmd,
pp->name));
entry = pp->private;
if (entry == NULL) {
g_io_deliver(bp, ENXIO);
return;
}
switch(bp->bio_cmd) {
case BIO_DELETE:
case BIO_READ:
case BIO_WRITE:
if (bp->bio_offset >= pp->mediasize) {
g_io_deliver(bp, EIO);
return;
}
bp2 = g_clone_bio(bp);
if (bp2 == NULL) {
g_io_deliver(bp, ENOMEM);
return;
}
if (bp2->bio_offset + bp2->bio_length > pp->mediasize)
bp2->bio_length = pp->mediasize - bp2->bio_offset;
bp2->bio_done = g_std_done;
bp2->bio_offset += entry->gpe_offset;
g_io_request(bp2, cp);
return;
case BIO_FLUSH:
break;
case BIO_GETATTR:
if (g_handleattr_int(bp, "GEOM::fwheads", table->gpt_heads))
return;
if (g_handleattr_int(bp, "GEOM::fwsectors", table->gpt_sectors))
return;
if (g_handleattr_int(bp, "PART::isleaf", table->gpt_isleaf))
return;
if (g_handleattr_int(bp, "PART::depth", table->gpt_depth))
return;
if (g_handleattr_str(bp, "PART::scheme",
table->gpt_scheme->name))
return;
if (!strcmp("GEOM::kerneldump", bp->bio_attribute)) {
/*
* Check that the partition is suitable for kernel
* dumps. Typically only swap partitions should be
* used.
*/
if (!G_PART_DUMPTO(table, entry)) {
g_io_deliver(bp, ENODEV);
printf("GEOM_PART: Partition '%s' not suitable"
" for kernel dumps (wrong type?)\n",
pp->name);
return;
}
gkd = (struct g_kerneldump *)bp->bio_data;
if (gkd->offset >= pp->mediasize) {
g_io_deliver(bp, EIO);
return;
}
if (gkd->offset + gkd->length > pp->mediasize)
gkd->length = pp->mediasize - gkd->offset;
gkd->offset += entry->gpe_offset;
}
break;
default:
g_io_deliver(bp, EOPNOTSUPP);
return;
}
bp2 = g_clone_bio(bp);
if (bp2 == NULL) {
g_io_deliver(bp, ENOMEM);
return;
}
bp2->bio_done = g_std_done;
g_io_request(bp2, cp);
}
static void
g_part_init(struct g_class *mp)
{
TAILQ_INSERT_HEAD(&g_part_schemes, &g_part_null_scheme, scheme_list);
}
static void
g_part_fini(struct g_class *mp)
{
TAILQ_REMOVE(&g_part_schemes, &g_part_null_scheme, scheme_list);
}
static void
g_part_unload_event(void *arg, int flag)
{
struct g_consumer *cp;
struct g_geom *gp;
struct g_provider *pp;
struct g_part_scheme *scheme;
struct g_part_table *table;
uintptr_t *xchg;
int acc, error;
if (flag == EV_CANCEL)
return;
xchg = arg;
error = 0;
scheme = (void *)(*xchg);
g_topology_assert();
LIST_FOREACH(gp, &g_part_class.geom, geom) {
table = gp->softc;
if (table->gpt_scheme != scheme)
continue;
acc = 0;
LIST_FOREACH(pp, &gp->provider, provider)
acc += pp->acr + pp->acw + pp->ace;
LIST_FOREACH(cp, &gp->consumer, consumer)
acc += cp->acr + cp->acw + cp->ace;
if (!acc)
g_part_wither(gp, ENOSYS);
else
error = EBUSY;
}
if (!error)
TAILQ_REMOVE(&g_part_schemes, scheme, scheme_list);
*xchg = error;
}
int
g_part_modevent(module_t mod, int type, struct g_part_scheme *scheme)
{
uintptr_t arg;
int error;
switch (type) {
case MOD_LOAD:
TAILQ_INSERT_TAIL(&g_part_schemes, scheme, scheme_list);
error = g_retaste(&g_part_class);
if (error)
TAILQ_REMOVE(&g_part_schemes, scheme, scheme_list);
break;
case MOD_UNLOAD:
arg = (uintptr_t)scheme;
error = g_waitfor_event(g_part_unload_event, &arg, M_WAITOK,
NULL);
if (!error)
error = (arg == (uintptr_t)scheme) ? EDOOFUS : arg;
break;
default:
error = EOPNOTSUPP;
break;
}
return (error);
}
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