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- Add GPT header/table recovery command

Browse Source 
- Minor related cleanup in add command

Approved by:	marcel
This commit is contained in:
Ken Smith 2003-11-16 06:45:26 +00:00
parent 3834ba7920
commit 12ce12716f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=122782
2 changed files with 92 additions and 4 deletions
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5
sbin/gpt/add.c
View File

@ -65,13 +65,14 @@ add(int fd)
gpt = map_find(MAP_TYPE_PRI_GPT_HDR);
if (gpt == NULL) {
warnx("%s: error: device does not contain a GPT", device_name);
warnx("%s: error: no primary GPT header; run create or recover",
device_name);
return;
}
tpg = map_find(MAP_TYPE_SEC_GPT_HDR);
if (tpg == NULL) {
warnx("%s: error: no secundary table; run recover",
warnx("%s: error: no secondary GPT header; run recover",
device_name);
return;
}

91
sbin/gpt/recover.c
View File

@ -51,10 +51,97 @@ usage_recover(void)
}
static void
recover(int fd __unused)
recover(int fd)
{
off_t last;
map_t *gpt, *tpg;
map_t *tbl, *lbt;
struct gpt_hdr *hdr;
/* TODO */
if (map_find(MAP_TYPE_MBR) != NULL) {
warnx("%s: error: device contains a MBR", device_name);
return;
}
gpt = map_find(MAP_TYPE_PRI_GPT_HDR);
tpg = map_find(MAP_TYPE_SEC_GPT_HDR);
tbl = map_find(MAP_TYPE_PRI_GPT_TBL);
lbt = map_find(MAP_TYPE_SEC_GPT_TBL);
if (gpt == NULL && tpg == NULL) {
warnx("%s: no primary or secondary GPT headers, can't recover",
device_name);
return;
}
if (tbl == NULL && lbt == NULL) {
warnx("%s: no primary or secondary GPT tables, can't recover",
device_name);
return;
}
last = mediasz / secsz - 1LL;
if (tbl != NULL && lbt == NULL) {
lbt = map_add(last - tbl->map_size, tbl->map_size,
MAP_TYPE_SEC_GPT_TBL, tbl->map_data);
if (lbt == NULL) {
warnx("%s: adding secondary GPT table failed",
device_name);
return;
}
gpt_write(fd, lbt);
warnx("%s: recovered secondary GPT table from primary",
device_name);
} else if (tbl == NULL && lbt != NULL) {
tbl = map_add(2LL, lbt->map_size, MAP_TYPE_PRI_GPT_TBL,
lbt->map_data);
if (tbl == NULL) {
warnx("%s: adding primary GPT table failed",
device_name);
return;
}
gpt_write(fd, tbl);
warnx("%s: recovered primary GPT table from secondary",
device_name);
}
if (gpt != NULL && tpg == NULL) {
tpg = map_add(last, 1LL, MAP_TYPE_SEC_GPT_HDR,
calloc(1, secsz));
if (tpg == NULL) {
warnx("%s: adding secondary GPT header failed",
device_name);
return;
}
memcpy(tpg->map_data, gpt->map_data, secsz);
hdr = tpg->map_data;
hdr->hdr_lba_self = tpg->map_start;
hdr->hdr_lba_alt = gpt->map_start;
hdr->hdr_lba_table = lbt->map_start;
hdr->hdr_crc_self = 0;
hdr->hdr_crc_self = crc32(hdr, hdr->hdr_size);
gpt_write(fd, tpg);
warnx("%s: recovered secondary GPT header from primary",
device_name);
} else if (gpt == NULL && tpg != NULL) {
gpt = map_add(1LL, 1LL, MAP_TYPE_PRI_GPT_HDR,
calloc(1, secsz));
if (gpt == NULL) {
warnx("%s: adding primary GPT header failed",
device_name);
return;
}
memcpy(gpt->map_data, tpg->map_data, secsz);
hdr = gpt->map_data;
hdr->hdr_lba_self = gpt->map_start;
hdr->hdr_lba_alt = tpg->map_start;
hdr->hdr_lba_table = tbl->map_start;
hdr->hdr_crc_self = 0;
hdr->hdr_crc_self = crc32(hdr, hdr->hdr_size);
gpt_write(fd, gpt);
warnx("%s: recovered primary GPT header from secondary",
device_name);
}
}
int