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Reimplemented "gpart destroy -F". Now it does all work in kernel.

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This was needed for recover implementation.

Implement the recover command for GPT. Now GPT will marked as
corrupt when any of three types of corruption will be detected:
1. Damaged primary GPT header or table
2. Damaged secondary GPT header or table
3. Secondary header is not located in the last LBA
Marked GPT becomes read-only. Any changes with corrupt table
are prohibited. Only "destroy" and "recover" commands are allowed.

Discussed with:	geom@ (mostly silence)
Tested by:	Ilya A. Arhipov
Approved by:	mav (mentor)
MFC after:	2 weeks
This commit is contained in:
Andrey V. Elsukov 2010-10-25 16:23:35 +00:00
parent 94294cada5
commit e7926a3703
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=214352
6 changed files with 267 additions and 106 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

96
sbin/geom/class/part/geom_part.c
View File

@ -67,7 +67,6 @@ static char ssize[32];
#define GPART_PARAM_BOOTCODE "bootcode"
#define GPART_PARAM_INDEX "index"
#define GPART_PARAM_PARTCODE "partcode"
#define GPART_PARAM_FORCE "force"
static struct gclass *find_class(struct gmesh *, const char *);
static struct ggeom * find_geom(struct gclass *, const char *);
@ -85,7 +84,6 @@ static void gpart_show_geom(struct ggeom *, const char *);
static int gpart_show_hasopt(struct gctl_req *, const char *, const char *);
static void gpart_write_partcode(struct ggeom *, int, void *, ssize_t);
static void gpart_write_partcode_vtoc8(struct ggeom *, int, void *);
static void gpart_destroy(struct gctl_req *, unsigned int);
static void gpart_print_error(const char *);
struct g_command PUBSYM(class_commands)[] = {
@ -123,8 +121,8 @@ struct g_command PUBSYM(class_commands)[] = {
G_OPT_SENTINEL },
"-i index [-f flags] geom"
},
{ "destroy", 0, gpart_destroy, {
{ 'F', GPART_PARAM_FORCE, NULL, G_TYPE_BOOL },
{ "destroy", 0, gpart_issue, {
{ 'F', "force", NULL, G_TYPE_BOOL },
{ 'f', "flags", GPART_FLAGS, G_TYPE_STRING },
G_OPT_SENTINEL },
"[-F] [-f flags] geom"
@ -167,6 +165,11 @@ struct g_command PUBSYM(class_commands)[] = {
G_OPT_SENTINEL },
"[-s size] -i index [-f flags] geom"
},
{ "recover", 0, gpart_issue, {
{ 'f', "flags", GPART_FLAGS, G_TYPE_STRING },
G_OPT_SENTINEL },
"[-f flags] geom"
},
G_CMD_SENTINEL
};
@ -539,13 +542,17 @@ gpart_show_geom(struct ggeom *gp, const char *element)
s = find_geomcfg(gp, "last");
last = (off_t)strtoimax(s, NULL, 0);
wblocks = strlen(s);
s = find_geomcfg(gp, "state");
if (s != NULL && *s != 'C')
s = NULL;
wname = strlen(gp->lg_name);
pp = LIST_FIRST(&gp->lg_consumer)->lg_provider;
secsz = pp->lg_sectorsize;
printf("=>%*jd %*jd %*s %s (%s)\n",
printf("=>%*jd %*jd %*s %s (%s)%s\n",
wblocks, (intmax_t)first, wblocks, (intmax_t)(last - first + 1),
wname, gp->lg_name,
scheme, fmtsize(pp->lg_mediasize));
scheme, fmtsize(pp->lg_mediasize),
s ? " [CORRUPT]": "");
while ((pp = find_provider(gp, first)) != NULL) {
s = find_provcfg(pp, "start");
@ -857,83 +864,6 @@ gpart_bootcode(struct gctl_req *req, unsigned int fl)
geom_deletetree(&mesh);
}
static void
gpart_destroy(struct gctl_req *req, unsigned int fl)
{
struct gmesh mesh;
struct gclass *classp;
struct gctl_req *req2;
struct ggeom *gp;
struct gprovider *pp;
const char *s;
int error, val;
intmax_t idx;
if (gctl_has_param(req, GPART_PARAM_FORCE)) {
val = gctl_get_int(req, GPART_PARAM_FORCE);
error = gctl_delete_param(req, GPART_PARAM_FORCE);
if (error)
errc(EXIT_FAILURE, error, "internal error");
if (val == 0)
goto done;
s = gctl_get_ascii(req, "class");
if (s == NULL)
abort();
error = geom_gettree(&mesh);
if (error != 0)
errc(EXIT_FAILURE, error, "Cannot get GEOM tree");
classp = find_class(&mesh, s);
if (classp == NULL) {
geom_deletetree(&mesh);
errx(EXIT_FAILURE, "Class %s not found.", s);
}
s = gctl_get_ascii(req, "arg0");
if (s == NULL)
abort();
gp = find_geom(classp, s);
if (gp == NULL)
errx(EXIT_FAILURE, "No such geom: %s.", s);
val = 0;
LIST_FOREACH(pp, &gp->lg_provider, lg_provider){
s = find_provcfg(pp, "index");
if (s == NULL)
errx(EXIT_FAILURE, "Index not found for %s.",
pp->lg_name);
idx = strtoimax(s, NULL, 0);
req2 = gctl_get_handle();
gctl_ro_param(req2, "class", -1, classp->lg_name);
gctl_ro_param(req2, "arg0", -1, gp->lg_name);
gctl_ro_param(req2, "verb", -1, "delete");
gctl_ro_param(req2, GPART_PARAM_INDEX,
sizeof(intmax_t), &idx);
gctl_ro_param(req2, "flags", -1, "X");
s = gctl_issue(req2);
if (s != NULL && s[0] != '\0') {
gpart_print_error(s);
gctl_free(req2);
if (val) { /* try to undo changes */
req2 = gctl_get_handle();
gctl_ro_param(req2, "verb", -1,
"undo");
gctl_ro_param(req2, "class", -1,
classp->lg_name);
gctl_ro_param(req2, "arg0", -1,
gp->lg_name);
gctl_issue(req2);
gctl_free(req2);
}
geom_deletetree(&mesh);
exit(EXIT_FAILURE);
}
gctl_free(req2);
val = 1;
}
geom_deletetree(&mesh);
}
done:
gpart_issue(req, fl);
}
static void
gpart_print_error(const char *errstr)
{

87
sbin/geom/class/part/gpart.8
View File

@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd September 28, 2010
.Dd October 25, 2010
.Dt GPART 8
.Os
.Sh NAME
@ -129,6 +129,11 @@ utility:
.Op Fl t Ar type
.Op Fl f Ar flags
.Ar geom
.\" ==== RECOVER ====
.Nm
.Cm recover
.Op Fl f Ar flags
.Ar geom
.\" ==== RESIZE ====
.Nm
.Cm resize
@ -353,6 +358,23 @@ See the section entitled
below for a discussion
about its use.
.El
.\" ==== RECOVER ====
.It Cm recover
Recover corrupt partition's scheme metadata on the geom
.Ar geom .
See the section entitled
.Sx "RECOVERING"
below for the additional information.
.Pp
Additional options include:
.Bl -tag -width 10n
.It Fl f Ar flags
Additional operational flags.
See the section entitled
.Sx "OPERATIONAL FLAGS"
below for a discussion
about its use.
.El
.\" ==== RESIZE ====
.It Cm resize
Resize a partition from geom
@ -629,6 +651,68 @@ the
action or reverted with the
.Cm undo
action.
.Sh RECOVERING
The GEOM class PART supports recovering of partition tables only for GPT.
The GUID partition table has a primary and secondary (backup) copy of
metadata for redundance. They are stored in the begining and in the end
of device respectively. Therefore it is acceptable to have some corruptions
in the metadata that are not fatal to work with GPT. When kernel detects
corrupt metadata it marks this table as corrupt and reports about corruption.
Any changes in corrupt table are prohibited except
.Cm destroy
and
.Cm recover .
.Pp
In case when only first sector is corrupt kernel can not detect GPT even
if partition table is not corrupt. You can write protective MBR with
.Xr dd 1
command to restore ability of GPT detection. The copy of protective MBR is
usually located in the
.Pa /boot/pmbr
file.
.Pp
In case when some of metadata is corrupt you will get to know about this
from kernel's messages like these:
.Bd -literal -offset indent
GEOM: provider: the primary GPT table is corrupt or invalid.
GEOM: provider: using the secondary instead -- recovery strongly advised.
.Ed
.Pp
or
.Bd -literal -offset indent
GEOM: provider: the secondary GPT table is corrupt or invalid.
GEOM: provider: using the primary only -- recovery suggested.
.Ed
.Pp
Also
.Cm gpart
commands like
.Cm show ,
.Cm status
and
.Cm list
will report about corrupt table.
.Pp
In case when the size of device has changed (e.g. volume expansion) the
secondary GPT header will become located not in the last sector. This is
not a metadata corruption, but it is dangerous because any corruption of
the primary GPT will lead to lost of partition table. Kernel reports about
this problem with message:
.Bd -literal -offset indent
GEOM: provider: the secondary GPT header is not in the last LBA.
.Ed
.Pp
A corrupt table can be recovered with
.Cm gpart recover
command. This command does reconstruction of corrupt metadata using
known valid metadata. Also it can relocate secondary GPT to the end of
device.
.Pp
.Pa NOTE :
The GEOM class PART can detect the same partition table on different GEOM
providers and some of them will marked as corrupt. Be careful when choising
a provider for recovering. If you did incorrect choise you can destroy
metadata of another GEOM class, e.g. GEOM MIRROR or GEOM LABEL.
.Sh EXIT STATUS
Exit status is 0 on success, and 1 if the command fails.
.Sh EXAMPLES
@ -687,6 +771,7 @@ After having created all required partitions, embed bootstrap code into them.
/sbin/gpart bootcode -p /boot/boot1 da0
.Ed
.Sh SEE ALSO
.Xr dd 1 ,
.Xr geom 4 ,
.Xr geom 8
.Sh HISTORY

83
sys/geom/part/g_part.c
View File

@ -924,7 +924,7 @@ 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_entry *entry, *tmp;
struct g_part_table *null, *table;
struct sbuf *sb;
int error;
@ -934,13 +934,34 @@ g_part_ctl_destroy(struct gctl_req *req, struct g_part_parms *gpp)
g_topology_assert();
table = gp->softc;
/* Check for busy providers. */
LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) {
if (entry->gpe_deleted || entry->gpe_internal)
continue;
if (gpp->gpp_force) {
pp = entry->gpe_pp;
if (pp == NULL)
continue;
if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)
continue;
}
gctl_error(req, "%d", EBUSY);
return (EBUSY);
}
if (gpp->gpp_force) {
/* Destroy all providers. */
LIST_FOREACH_SAFE(entry, &table->gpt_entry, gpe_entry, tmp) {
pp = entry->gpe_pp;
if (pp != NULL) {
pp->private = NULL;
g_wither_provider(pp, ENXIO);
}
LIST_REMOVE(entry, gpe_entry);
g_free(entry);
}
}
error = G_PART_DESTROY(table, gpp);
if (error) {
gctl_error(req, "%d", error);
@ -1037,8 +1058,39 @@ g_part_ctl_move(struct gctl_req *req, struct g_part_parms *gpp)
static int
g_part_ctl_recover(struct gctl_req *req, struct g_part_parms *gpp)
{
gctl_error(req, "%d verb 'recover'", ENOSYS);
return (ENOSYS);
struct g_part_table *table;
struct g_geom *gp;
struct sbuf *sb;
int error, recovered;
gp = gpp->gpp_geom;
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name));
g_topology_assert();
table = gp->softc;
error = recovered = 0;
if (table->gpt_corrupt) {
error = G_PART_RECOVER(table);
if (error) {
gctl_error(req, "%d recovering '%s' failed",
error, gp->name);
return (error);
}
recovered = 1;
}
/* Provide feedback if so requested. */
if (gpp->gpp_parms & G_PART_PARM_OUTPUT) {
sb = sbuf_new_auto();
if (recovered)
sbuf_printf(sb, "%s recovered\n", gp->name);
else
sbuf_printf(sb, "%s recovering is not needed\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
@ -1341,6 +1393,7 @@ g_part_ctlreq(struct gctl_req *req, struct g_class *mp, const char *verb)
} else if (!strcmp(verb, "destroy")) {
ctlreq = G_PART_CTL_DESTROY;
mparms |= G_PART_PARM_GEOM;
oparms |= G_PART_PARM_FORCE;
}
break;
case 'm':
@ -1415,6 +1468,8 @@ g_part_ctlreq(struct gctl_req *req, struct g_class *mp, const char *verb)
case 'f':
if (!strcmp(ap->name, "flags"))
parm = G_PART_PARM_FLAGS;
else if (!strcmp(ap->name, "force"))
parm = G_PART_PARM_FORCE;
break;
case 'i':
if (!strcmp(ap->name, "index"))
@ -1453,7 +1508,8 @@ g_part_ctlreq(struct gctl_req *req, struct g_class *mp, const char *verb)
}
switch (parm) {
case G_PART_PARM_ATTRIB:
error = g_part_parm_str(req, ap->name, &gpp.gpp_attrib);
error = g_part_parm_str(req, ap->name,
&gpp.gpp_attrib);
break;
case G_PART_PARM_BOOTCODE:
error = g_part_parm_bootcode(req, ap->name,
@ -1466,11 +1522,16 @@ g_part_ctlreq(struct gctl_req *req, struct g_class *mp, const char *verb)
case G_PART_PARM_FLAGS:
error = g_part_parm_str(req, ap->name, &gpp.gpp_flags);
break;
case G_PART_PARM_FORCE:
error = g_part_parm_uint32(req, ap->name,
&gpp.gpp_force);
break;
case G_PART_PARM_GEOM:
error = g_part_parm_geom(req, ap->name, &gpp.gpp_geom);
break;
case G_PART_PARM_INDEX:
error = g_part_parm_intmax(req, ap->name, &gpp.gpp_index);
error = g_part_parm_intmax(req, ap->name,
&gpp.gpp_index);
break;
case G_PART_PARM_LABEL:
error = g_part_parm_str(req, ap->name, &gpp.gpp_label);
@ -1490,7 +1551,8 @@ g_part_ctlreq(struct gctl_req *req, struct g_class *mp, const char *verb)
error = g_part_parm_quad(req, ap->name, &gpp.gpp_size);
break;
case G_PART_PARM_START:
error = g_part_parm_quad(req, ap->name, &gpp.gpp_start);
error = g_part_parm_quad(req, ap->name,
&gpp.gpp_start);
break;
case G_PART_PARM_TYPE:
error = g_part_parm_str(req, ap->name, &gpp.gpp_type);
@ -1524,6 +1586,13 @@ g_part_ctlreq(struct gctl_req *req, struct g_class *mp, const char *verb)
table = NULL;
if (modifies && (gpp.gpp_parms & G_PART_PARM_GEOM)) {
table = gpp.gpp_geom->softc;
if (table != NULL && table->gpt_corrupt &&
ctlreq != G_PART_CTL_DESTROY &&
ctlreq != G_PART_CTL_RECOVER) {
gctl_error(req, "%d table '%s' is corrupt",
EPERM, gpp.gpp_geom->name);
return;
}
if (table != NULL && !table->gpt_opened) {
error = g_access(LIST_FIRST(&gpp.gpp_geom->consumer),
1, 1, 1);
@ -1789,6 +1858,8 @@ g_part_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
table->gpt_sectors);
sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", indent,
table->gpt_heads);
sbuf_printf(sb, "%s<state>%s</state>\n", indent,
table->gpt_corrupt ? "CORRUPT": "OK");
G_PART_DUMPCONF(table, NULL, sb, indent);
}
}

3
sys/geom/part/g_part.h
View File

@ -132,6 +132,7 @@ struct g_part_table {
int gpt_modified:1; /* Table changes have been made. */
int gpt_opened:1; /* Permissions obtained. */
int gpt_fixgeom:1; /* Geometry is fixed. */
int gpt_corrupt:1; /* Table is corrupt. */
};
struct g_part_entry *g_part_new_entry(struct g_part_table *, int, quad_t,
@ -169,6 +170,7 @@ enum g_part_ctl {
#define G_PART_PARM_VERSION 0x0800
#define G_PART_PARM_BOOTCODE 0x1000
#define G_PART_PARM_ATTRIB 0x2000
#define G_PART_PARM_FORCE 0x4000
struct g_part_parms {
unsigned int gpp_parms;
@ -186,6 +188,7 @@ struct g_part_parms {
const void *gpp_codeptr;
unsigned int gpp_codesize;
const char *gpp_attrib;
unsigned int gpp_force;
};
void g_part_geometry_heads(off_t, u_int, off_t *, u_int *);

93
sys/geom/part/g_part_gpt.c
View File

@ -94,7 +94,7 @@ static int g_part_gpt_destroy(struct g_part_table *, struct g_part_parms *);
static void g_part_gpt_dumpconf(struct g_part_table *, struct g_part_entry *,
struct sbuf *, const char *);
static int g_part_gpt_dumpto(struct g_part_table *, struct g_part_entry *);
static int g_part_gpt_modify(struct g_part_table *, struct g_part_entry *,
static int g_part_gpt_modify(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static const char *g_part_gpt_name(struct g_part_table *, struct g_part_entry *,
char *, size_t);
@ -107,6 +107,7 @@ static const char *g_part_gpt_type(struct g_part_table *, struct g_part_entry *,
static int g_part_gpt_write(struct g_part_table *, struct g_consumer *);
static int g_part_gpt_resize(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static int g_part_gpt_recover(struct g_part_table *);
static kobj_method_t g_part_gpt_methods[] = {
KOBJMETHOD(g_part_add, g_part_gpt_add),
@ -120,6 +121,7 @@ static kobj_method_t g_part_gpt_methods[] = {
KOBJMETHOD(g_part_name, g_part_gpt_name),
KOBJMETHOD(g_part_probe, g_part_gpt_probe),
KOBJMETHOD(g_part_read, g_part_gpt_read),
KOBJMETHOD(g_part_recover, g_part_gpt_recover),
KOBJMETHOD(g_part_setunset, g_part_gpt_setunset),
KOBJMETHOD(g_part_type, g_part_gpt_type),
KOBJMETHOD(g_part_write, g_part_gpt_write),
@ -170,7 +172,7 @@ static struct uuid gpt_uuid_unused = GPT_ENT_TYPE_UNUSED;
static struct g_part_uuid_alias {
struct uuid *uuid;
int alias;
int alias;
} gpt_uuid_alias_match[] = {
{ &gpt_uuid_apple_boot, G_PART_ALIAS_APPLE_BOOT },
{ &gpt_uuid_apple_hfs, G_PART_ALIAS_APPLE_HFS },
@ -217,8 +219,16 @@ gpt_read_hdr(struct g_part_gpt_table *table, struct g_consumer *cp,
pp = cp->provider;
last = (pp->mediasize / pp->sectorsize) - 1;
table->lba[elt] = (elt == GPT_ELT_PRIHDR) ? 1 : last;
table->state[elt] = GPT_STATE_MISSING;
/*
* If the primary header is valid look for secondary
* header in AlternateLBA, otherwise in the last medium's LBA.
*/
if (elt == GPT_ELT_SECHDR) {
if (table->state[GPT_ELT_PRIHDR] != GPT_STATE_OK)
table->lba[elt] = last;
} else
table->lba[elt] = 1;
buf = g_read_data(cp, table->lba[elt] * pp->sectorsize, pp->sectorsize,
&error);
if (buf == NULL)
@ -244,12 +254,15 @@ gpt_read_hdr(struct g_part_gpt_table *table, struct g_consumer *cp,
table->state[elt] = GPT_STATE_INVALID;
hdr->hdr_revision = le32toh(buf->hdr_revision);
if (hdr->hdr_revision < 0x00010000)
if (hdr->hdr_revision < GPT_HDR_REVISION)
goto fail;
hdr->hdr_lba_self = le64toh(buf->hdr_lba_self);
if (hdr->hdr_lba_self != table->lba[elt])
goto fail;
hdr->hdr_lba_alt = le64toh(buf->hdr_lba_alt);
if (hdr->hdr_lba_alt == hdr->hdr_lba_self ||
hdr->hdr_lba_alt > last)
goto fail;
/* Check the managed area. */
hdr->hdr_lba_start = le64toh(buf->hdr_lba_start);
@ -283,6 +296,10 @@ gpt_read_hdr(struct g_part_gpt_table *table, struct g_consumer *cp,
le_uuid_dec(&buf->hdr_uuid, &hdr->hdr_uuid);
hdr->hdr_crc_table = le32toh(buf->hdr_crc_table);
/* save LBA for secondary header */
if (elt == GPT_ELT_PRIHDR)
table->lba[GPT_ELT_SECHDR] = hdr->hdr_lba_alt;
g_free(buf);
return (hdr);
@ -490,18 +507,21 @@ static int
g_part_gpt_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
{
struct g_part_gpt_table *table;
struct g_provider *pp;
table = (struct g_part_gpt_table *)basetable;
if (table->hdr != NULL)
g_free(table->hdr);
pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider;
g_free(table->hdr);
table->hdr = NULL;
/*
* Wipe the first 2 sectors as well as the last to clear the
* partitioning.
* Wipe the first 2 sectors to clear the partitioning. Wipe the last
* sector only if it has valid secondary header.
*/
basetable->gpt_smhead |= 3;
basetable->gpt_smtail |= 1;
if (table->state[GPT_ELT_SECHDR] == GPT_STATE_OK &&
table->lba[GPT_ELT_SECHDR] == pp->mediasize / pp->sectorsize - 1)
basetable->gpt_smtail |= 1;
return (0);
}
@ -665,10 +685,12 @@ g_part_gpt_read(struct g_part_table *basetable, struct g_consumer *cp)
struct g_part_gpt_table *table;
struct g_part_gpt_entry *entry;
u_char *buf;
uint64_t last;
int error, index;
table = (struct g_part_gpt_table *)basetable;
pp = cp->provider;
last = (pp->mediasize / pp->sectorsize) - 1;
/* Read the PMBR */
buf = g_read_data(cp, 0, pp->sectorsize, &error);
@ -732,6 +754,7 @@ g_part_gpt_read(struct g_part_table *basetable, struct g_consumer *cp)
printf("GEOM: %s: using the secondary instead -- recovery "
"strongly advised.\n", pp->name);
table->hdr = sechdr;
basetable->gpt_corrupt = 1;
if (prihdr != NULL)
g_free(prihdr);
tbl = sectbl;
@ -743,6 +766,11 @@ g_part_gpt_read(struct g_part_table *basetable, struct g_consumer *cp)
"or invalid.\n", pp->name);
printf("GEOM: %s: using the primary only -- recovery "
"suggested.\n", pp->name);
basetable->gpt_corrupt = 1;
} else if (table->lba[GPT_ELT_SECHDR] != last) {
printf( "GEOM: %s: the secondary GPT header is not in "
"the last LBA.\n", pp->name);
basetable->gpt_corrupt = 1;
}
table->hdr = prihdr;
if (sechdr != NULL)
@ -759,8 +787,9 @@ g_part_gpt_read(struct g_part_table *basetable, struct g_consumer *cp)
for (index = basetable->gpt_entries - 1; index >= 0; index--) {
if (EQUUID(&tbl[index].ent_type, &gpt_uuid_unused))
continue;
entry = (struct g_part_gpt_entry *)g_part_new_entry(basetable,
index+1, tbl[index].ent_lba_start, tbl[index].ent_lba_end);
entry = (struct g_part_gpt_entry *)g_part_new_entry(
basetable, index + 1, tbl[index].ent_lba_start,
tbl[index].ent_lba_end);
entry->ent = tbl[index];
}
@ -768,6 +797,38 @@ g_part_gpt_read(struct g_part_table *basetable, struct g_consumer *cp)
return (0);
}
static int
g_part_gpt_recover(struct g_part_table *basetable)
{
struct g_part_gpt_table *table;
struct g_provider *pp;
uint64_t last;
size_t tblsz;
table = (struct g_part_gpt_table *)basetable;
pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider;
last = pp->mediasize / pp->sectorsize - 1;
tblsz = (table->hdr->hdr_entries * table->hdr->hdr_entsz +
pp->sectorsize - 1) / pp->sectorsize;
table->lba[GPT_ELT_PRIHDR] = 1;
table->lba[GPT_ELT_PRITBL] = 2;
table->lba[GPT_ELT_SECHDR] = last;
table->lba[GPT_ELT_SECTBL] = last - tblsz;
table->state[GPT_ELT_PRIHDR] = GPT_STATE_OK;
table->state[GPT_ELT_PRITBL] = GPT_STATE_OK;
table->state[GPT_ELT_SECHDR] = GPT_STATE_OK;
table->state[GPT_ELT_SECTBL] = GPT_STATE_OK;
table->hdr->hdr_lba_start = 2 + tblsz;
table->hdr->hdr_lba_end = last - tblsz - 1;
basetable->gpt_first = table->hdr->hdr_lba_start;
basetable->gpt_last = table->hdr->hdr_lba_end;
basetable->gpt_corrupt = 0;
return (0);
}
static int
g_part_gpt_setunset(struct g_part_table *table, struct g_part_entry *baseentry,
const char *attrib, unsigned int set)
@ -867,13 +928,13 @@ g_part_gpt_write(struct g_part_table *basetable, struct g_consumer *cp)
struct g_part_entry *baseentry;
struct g_part_gpt_entry *entry;
struct g_part_gpt_table *table;
size_t tlbsz;
size_t tblsz;
uint32_t crc;
int error, index;
pp = cp->provider;
table = (struct g_part_gpt_table *)basetable;
tlbsz = (table->hdr->hdr_entries * table->hdr->hdr_entsz +
tblsz = (table->hdr->hdr_entries * table->hdr->hdr_entsz +
pp->sectorsize - 1) / pp->sectorsize;
/* Write the PMBR */
@ -885,7 +946,7 @@ g_part_gpt_write(struct g_part_table *basetable, struct g_consumer *cp)
return (error);
/* Allocate space for the header and entries. */
buf = g_malloc((tlbsz + 1) * pp->sectorsize, M_WAITOK | M_ZERO);
buf = g_malloc((tblsz + 1) * pp->sectorsize, M_WAITOK | M_ZERO);
memcpy(buf, table->hdr->hdr_sig, sizeof(table->hdr->hdr_sig));
le32enc(buf + 8, table->hdr->hdr_revision);
@ -924,7 +985,7 @@ g_part_gpt_write(struct g_part_table *basetable, struct g_consumer *cp)
le32enc(buf + 16, crc);
error = g_write_data(cp, table->lba[GPT_ELT_PRITBL] * pp->sectorsize,
buf + pp->sectorsize, tlbsz * pp->sectorsize);
buf + pp->sectorsize, tblsz * pp->sectorsize);
if (error)
goto out;
error = g_write_data(cp, table->lba[GPT_ELT_PRIHDR] * pp->sectorsize,
@ -941,7 +1002,7 @@ g_part_gpt_write(struct g_part_table *basetable, struct g_consumer *cp)
le32enc(buf + 16, crc);
error = g_write_data(cp, table->lba[GPT_ELT_SECTBL] * pp->sectorsize,
buf + pp->sectorsize, tlbsz * pp->sectorsize);
buf + pp->sectorsize, tblsz * pp->sectorsize);
if (error)
goto out;
error = g_write_data(cp, table->lba[GPT_ELT_SECHDR] * pp->sectorsize,

11
sys/geom/part/g_part_if.m
View File

@ -65,6 +65,12 @@ CODE {
{
return (ENOSYS);
}
static int
default_recover(struct g_part_table *t __unused)
{
return (ENOSYS);
}
};
# add() - scheme specific processing for the add verb.
@ -163,6 +169,11 @@ METHOD int read {
struct g_consumer *cp;
};
# recover() - scheme specific processing for the recover verb.
METHOD int recover {
struct g_part_table *table;
} DEFAULT default_recover;
# setunset() - set or unset partition entry attributes.
METHOD int setunset {
struct g_part_table *table;