|
 |
01ff50 |
From 171e9743881edf2dfb163ddff483566fbf913ccd Mon Sep 17 00:00:00 2001
|
|
|
01ff50 |
From: NeilBrown <neilb@suse.de>
|
|
|
01ff50 |
Date: Fri, 26 Aug 2022 08:55:56 +1000
|
|
|
01ff50 |
Subject: [PATCH 53/83] super1: report truncated device
|
|
|
01ff50 |
|
|
|
01ff50 |
When the metadata is at the start of the device, it is possible that it
|
|
|
01ff50 |
describes a device large than the one it is actually stored on. When
|
|
|
01ff50 |
this happens, report it loudly in --examine.
|
|
|
01ff50 |
|
|
|
01ff50 |
....
|
|
|
01ff50 |
Unused Space : before=1968 sectors, after=-2047 sectors DEVICE TOO SMALL
|
|
|
01ff50 |
State : clean TRUNCATED DEVICE
|
|
|
01ff50 |
....
|
|
|
01ff50 |
|
|
|
01ff50 |
Also report in --assemble so that the failure which the kernel will
|
|
|
01ff50 |
report will be explained.
|
|
|
01ff50 |
|
|
|
01ff50 |
mdadm: Device /dev/sdb is not large enough for data described in superblock
|
|
|
01ff50 |
mdadm: no RAID superblock on /dev/sdb
|
|
|
01ff50 |
mdadm: /dev/sdb has no superblock - assembly aborted
|
|
|
01ff50 |
|
|
|
01ff50 |
Scenario can be demonstrated as follows:
|
|
|
01ff50 |
|
|
|
01ff50 |
mdadm: Note: this array has metadata at the start and
|
|
|
01ff50 |
may not be suitable as a boot device. If you plan to
|
|
|
01ff50 |
store '/boot' on this device please ensure that
|
|
|
01ff50 |
your boot-loader understands md/v1.x metadata, or use
|
|
|
01ff50 |
--metadata=0.90
|
|
|
01ff50 |
mdadm: Defaulting to version 1.2 metadata
|
|
|
01ff50 |
mdadm: array /dev/md/test started.
|
|
|
01ff50 |
mdadm: stopped /dev/md/test
|
|
|
01ff50 |
Unused Space : before=1968 sectors, after=-2047 sectors DEVICE TOO SMALL
|
|
|
01ff50 |
State : clean TRUNCATED DEVICE
|
|
|
01ff50 |
Unused Space : before=1968 sectors, after=-2047 sectors DEVICE TOO SMALL
|
|
|
01ff50 |
State : clean TRUNCATED DEVICE
|
|
|
01ff50 |
|
|
|
01ff50 |
Signed-off-by: NeilBrown <neilb@suse.de>
|
|
|
01ff50 |
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
|
|
|
01ff50 |
---
|
|
|
01ff50 |
super1.c | 35 ++++++++++++++++++++++++++++-------
|
|
|
01ff50 |
1 file changed, 28 insertions(+), 7 deletions(-)
|
|
|
01ff50 |
|
|
|
01ff50 |
diff --git a/super1.c b/super1.c
|
|
|
01ff50 |
index 71af860c..58345e68 100644
|
|
|
01ff50 |
--- a/super1.c
|
|
|
01ff50 |
+++ b/super1.c
|
|
|
01ff50 |
@@ -406,12 +406,18 @@ static void examine_super1(struct supertype *st, char *homehost)
|
|
|
01ff50 |
|
|
|
01ff50 |
st->ss->getinfo_super(st, &info, NULL);
|
|
|
01ff50 |
if (info.space_after != 1 &&
|
|
|
01ff50 |
- !(__le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET))
|
|
|
01ff50 |
- printf(" Unused Space : before=%llu sectors, after=%llu sectors\n",
|
|
|
01ff50 |
- info.space_before, info.space_after);
|
|
|
01ff50 |
-
|
|
|
01ff50 |
- printf(" State : %s\n",
|
|
|
01ff50 |
- (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean");
|
|
|
01ff50 |
+ !(__le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) {
|
|
|
01ff50 |
+ printf(" Unused Space : before=%llu sectors, ",
|
|
|
01ff50 |
+ info.space_before);
|
|
|
01ff50 |
+ if (info.space_after < INT64_MAX)
|
|
|
01ff50 |
+ printf("after=%llu sectors\n", info.space_after);
|
|
|
01ff50 |
+ else
|
|
|
01ff50 |
+ printf("after=-%llu sectors DEVICE TOO SMALL\n",
|
|
|
01ff50 |
+ UINT64_MAX - info.space_after);
|
|
|
01ff50 |
+ }
|
|
|
01ff50 |
+ printf(" State : %s%s\n",
|
|
|
01ff50 |
+ (__le64_to_cpu(sb->resync_offset)+1) ? "active":"clean",
|
|
|
01ff50 |
+ (info.space_after > INT64_MAX) ? " TRUNCATED DEVICE" : "");
|
|
|
01ff50 |
printf(" Device UUID : ");
|
|
|
01ff50 |
for (i=0; i<16; i++) {
|
|
|
01ff50 |
if ((i&3)==0 && i != 0)
|
|
|
01ff50 |
@@ -2206,6 +2212,7 @@ static int load_super1(struct supertype *st, int fd, char *devname)
|
|
|
01ff50 |
tst.ss = &super;;
|
|
|
01ff50 |
for (tst.minor_version = 0; tst.minor_version <= 2;
|
|
|
01ff50 |
tst.minor_version++) {
|
|
|
01ff50 |
+ tst.ignore_hw_compat = st->ignore_hw_compat;
|
|
|
01ff50 |
switch(load_super1(&tst, fd, devname)) {
|
|
|
01ff50 |
case 0: super = tst.sb;
|
|
|
01ff50 |
if (bestvers == -1 ||
|
|
|
01ff50 |
@@ -2312,7 +2319,6 @@ static int load_super1(struct supertype *st, int fd, char *devname)
|
|
|
01ff50 |
free(super);
|
|
|
01ff50 |
return 2;
|
|
|
01ff50 |
}
|
|
|
01ff50 |
- st->sb = super;
|
|
|
01ff50 |
|
|
|
01ff50 |
bsb = (struct bitmap_super_s *)(((char*)super)+MAX_SB_SIZE);
|
|
|
01ff50 |
|
|
|
01ff50 |
@@ -2322,6 +2328,21 @@ static int load_super1(struct supertype *st, int fd, char *devname)
|
|
|
01ff50 |
if (st->data_offset == INVALID_SECTORS)
|
|
|
01ff50 |
st->data_offset = __le64_to_cpu(super->data_offset);
|
|
|
01ff50 |
|
|
|
01ff50 |
+ if (st->minor_version >= 1 &&
|
|
|
01ff50 |
+ st->ignore_hw_compat == 0 &&
|
|
|
01ff50 |
+ (dsize < (__le64_to_cpu(super->data_offset) +
|
|
|
01ff50 |
+ __le64_to_cpu(super->size))
|
|
|
01ff50 |
+ ||
|
|
|
01ff50 |
+ dsize < (__le64_to_cpu(super->data_offset) +
|
|
|
01ff50 |
+ __le64_to_cpu(super->data_size)))) {
|
|
|
01ff50 |
+ if (devname)
|
|
|
01ff50 |
+ pr_err("Device %s is not large enough for data described in superblock\n",
|
|
|
01ff50 |
+ devname);
|
|
|
01ff50 |
+ free(super);
|
|
|
01ff50 |
+ return 2;
|
|
|
01ff50 |
+ }
|
|
|
01ff50 |
+ st->sb = super;
|
|
|
01ff50 |
+
|
|
|
01ff50 |
/* Now check on the bitmap superblock */
|
|
|
01ff50 |
if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0)
|
|
|
01ff50 |
return 0;
|
|
|
01ff50 |
--
|
|
|
01ff50 |
2.38.1
|
|
|
01ff50 |
|