* [PATCH] xfs_repair: print superblock offsets and denial reasons
@ 2008-10-22 18:36 KELEMEN Peter
2008-10-22 23:41 ` [PATCH V2] xfs_repair: print superblock offsets and why they can't be verified KELEMEN Peter
0 siblings, 1 reply; 5+ messages in thread
From: KELEMEN Peter @ 2008-10-22 18:36 UTC (permalink / raw)
To: xfs
Example output (without the scanning dots):
Phase 1 - find and verify superblock.
bad primary superblock - bad magic number !!!
attempting to find secondary superblock...
found candidate secondary superblock...
offset: 62498275328
reason: 16
unable to verify superblock, continuing...
found candidate secondary superblock...
offset: 156246212608
reason: 16
unable to verify superblock, continuing...
found candidate secondary superblock...
offset: 249994149888
reason: 16
unable to verify superblock, continuing...
found candidate secondary superblock...
offset: 343742087168
reason: 16
unable to verify superblock, continuing...
found candidate secondary superblock...
offset: 437490024448
reason: 16
unable to verify superblock, continuing...
found candidate secondary superblock...
offset: 531237961728
reason: 16
unable to verify superblock, continuing...
found candidate secondary superblock...
offset: 624985899008
reason: 16
unable to verify superblock, continuing...
found candidate secondary superblock...
offset: 718733836288
reason: 16
unable to verify superblock, continuing...
found candidate secondary superblock...
offset: 812481773568
reason: 16
unable to verify superblock, continuing...
found candidate secondary superblock...
offset: 906229710848
reason: 16
unable to verify superblock, continuing...
Sorry, could not find valid secondary superblock
Exiting now.
Signed-off-by: KELEMEN Peter <Peter.Kelemen@cern.ch>
Index: xfsprogs/repair/sb.c
===================================================================
RCS file: /cvs/xfs-cmds/xfsprogs/repair/sb.c,v
retrieving revision 1.22
diff -u -r1.22 sb.c
--- xfsprogs/repair/sb.c 8 Sep 2008 06:18:43 -0000 1.22
+++ xfsprogs/repair/sb.c 22 Oct 2008 18:13:26 -0000
@@ -96,6 +96,7 @@
int dirty;
int retval;
int bsize;
+ int reason; /* why sb cannot be verified */
do_warn(_("\nattempting to find secondary superblock...\n"));
@@ -140,6 +141,7 @@
continue;
do_warn(_("found candidate secondary superblock...\n"));
+ do_warn("offset: %Lu\n", off);
/*
* found one. now verify it by looking
@@ -149,12 +151,13 @@
rsb->sb_inprogress = 0;
clear_sunit = 1;
- if (verify_set_primary_sb(rsb, 0, &dirty) == XR_OK) {
+ if ((reason = verify_set_primary_sb(rsb, 0, &dirty)) == XR_OK) {
do_warn(
_("verified secondary superblock...\n"));
done = 1;
retval = 1;
} else {
+ do_warn("reason: %d\n", reason);
do_warn(
_("unable to verify superblock, continuing...\n"));
}
^ permalink raw reply [flat|nested] 5+ messages in thread* [PATCH V2] xfs_repair: print superblock offsets and why they can't be verified
2008-10-22 18:36 [PATCH] xfs_repair: print superblock offsets and denial reasons KELEMEN Peter
@ 2008-10-22 23:41 ` KELEMEN Peter
2008-10-23 13:53 ` Eric Sandeen
0 siblings, 1 reply; 5+ messages in thread
From: KELEMEN Peter @ 2008-10-22 23:41 UTC (permalink / raw)
To: xfs
Eric has pointed out that verify_set_primary_sb() will either
return 1 or XR_INSUFF_SEC_SB. Move the check lower into
verify_set_primary_sb() by checking the return value of
verify_sb(). Example output:
found candidate secondary superblock...
verifying sb at 31249334272: bad magic number (1)
verifying sb at 62498668544: bad magic number (1)
verifying sb at 93748002816: bad magic number (1)
verifying sb at 124997337088: bad magic number (1)
unable to verify superblock, continuing...
Signed-off-by: KELEMEN Peter <Peter.Kelemen@cern.ch>
Index: xfsprogs/repair/sb.c
===================================================================
RCS file: /cvs/xfs-cmds/xfsprogs/repair/sb.c,v
retrieving revision 1.22
diff -u -u -r1.22 sb.c
--- xfsprogs/repair/sb.c 8 Sep 2008 06:18:43 -0000 1.22
+++ xfsprogs/repair/sb.c 22 Oct 2008 23:17:27 -0000
@@ -683,6 +683,7 @@
int num_ok;
int retval;
int round;
+ int reason; /* why the sb check failed */
/*
* select the number of secondaries to try for
@@ -727,7 +728,7 @@
goto out;
}
- if (verify_sb(sb, 0) == XR_OK) {
+ if ((reason = verify_sb(sb, 0)) == XR_OK) {
/*
* save away geometry info.
* don't bother checking the sb
@@ -740,6 +741,9 @@
get_sb_geometry(&geo, sb);
list = add_geo(list, &geo, agno);
num_ok++;
+ } else {
+ do_warn("verifying sb at %Lu: %s (%d)\n",
+ off, err_string(reason), reason);
}
}
}
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH V2] xfs_repair: print superblock offsets and why they can't be verified
2008-10-22 23:41 ` [PATCH V2] xfs_repair: print superblock offsets and why they can't be verified KELEMEN Peter
@ 2008-10-23 13:53 ` Eric Sandeen
2008-10-23 14:24 ` Eric Sandeen
2008-11-21 1:03 ` Barry Naujok
0 siblings, 2 replies; 5+ messages in thread
From: Eric Sandeen @ 2008-10-23 13:53 UTC (permalink / raw)
To: xfs
KELEMEN Peter wrote:
> Eric has pointed out that verify_set_primary_sb() will either
> return 1 or XR_INSUFF_SEC_SB. Move the check lower into
> verify_set_primary_sb() by checking the return value of
> verify_sb(). Example output:
>
> found candidate secondary superblock...
> verifying sb at 31249334272: bad magic number (1)
> verifying sb at 62498668544: bad magic number (1)
> verifying sb at 93748002816: bad magic number (1)
> verifying sb at 124997337088: bad magic number (1)
> unable to verify superblock, continuing...
>
This looks better :) You may want to add even more info...
while it's just searching block by block, if it finds a candidate, I'd
print the sector offset for that candidate (your first output line).
And rather than "verifying sb at..." you might do something like
"comparing to sb N at offset X":
+ } else {
+ do_warn("comparing with sb %d at sector %Lu failed: %s (%d)\n",
+ agno, off, err_string(reason), reason);
because at this point it's using the geometry of the candidate sb to see
if it can be used to find enough other valid sb's....
-Eric
> Signed-off-by: KELEMEN Peter <Peter.Kelemen@cern.ch>
>
> Index: xfsprogs/repair/sb.c
> ===================================================================
> RCS file: /cvs/xfs-cmds/xfsprogs/repair/sb.c,v
> retrieving revision 1.22
> diff -u -u -r1.22 sb.c
> --- xfsprogs/repair/sb.c 8 Sep 2008 06:18:43 -0000 1.22
> +++ xfsprogs/repair/sb.c 22 Oct 2008 23:17:27 -0000
> @@ -683,6 +683,7 @@
> int num_ok;
> int retval;
> int round;
> + int reason; /* why the sb check failed */
>
> /*
> * select the number of secondaries to try for
> @@ -727,7 +728,7 @@
> goto out;
> }
>
> - if (verify_sb(sb, 0) == XR_OK) {
> + if ((reason = verify_sb(sb, 0)) == XR_OK) {
> /*
> * save away geometry info.
> * don't bother checking the sb
> @@ -740,6 +741,9 @@
> get_sb_geometry(&geo, sb);
> list = add_geo(list, &geo, agno);
> num_ok++;
> + } else {
> + do_warn("verifying sb at %Lu: %s (%d)\n",
> + off, err_string(reason), reason);
> }
> }
> }
>
>
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH V2] xfs_repair: print superblock offsets and why they can't be verified
2008-10-23 13:53 ` Eric Sandeen
@ 2008-10-23 14:24 ` Eric Sandeen
2008-11-21 1:03 ` Barry Naujok
1 sibling, 0 replies; 5+ messages in thread
From: Eric Sandeen @ 2008-10-23 14:24 UTC (permalink / raw)
To: xfs
Eric Sandeen wrote:
> KELEMEN Peter wrote:
>> Eric has pointed out that verify_set_primary_sb() will either
>> return 1 or XR_INSUFF_SEC_SB. Move the check lower into
>> verify_set_primary_sb() by checking the return value of
>> verify_sb(). Example output:
>>
>> found candidate secondary superblock...
>> verifying sb at 31249334272: bad magic number (1)
>> verifying sb at 62498668544: bad magic number (1)
>> verifying sb at 93748002816: bad magic number (1)
>> verifying sb at 124997337088: bad magic number (1)
>> unable to verify superblock, continuing...
>>
>
> This looks better :) You may want to add even more info...
>
> while it's just searching block by block, if it finds a candidate, I'd
> print the sector offset for that candidate (your first output line).
>
> And rather than "verifying sb at..." you might do something like
> "comparing to sb N at offset X":
>
> + } else {
> + do_warn("comparing with sb %d at sector %Lu failed: %s (%d)\n",
> + agno, off, err_string(reason), reason);
Sorry, that was a pre-coffee email :) The units are bytes, not sectors,
aren't they... in any case, printing the (proper) units for the values
would be helpful.
-Eric
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH V2] xfs_repair: print superblock offsets and why they can't be verified
2008-10-23 13:53 ` Eric Sandeen
2008-10-23 14:24 ` Eric Sandeen
@ 2008-11-21 1:03 ` Barry Naujok
1 sibling, 0 replies; 5+ messages in thread
From: Barry Naujok @ 2008-11-21 1:03 UTC (permalink / raw)
To: xfs
On Fri, 24 Oct 2008 00:53:10 +1100, Eric Sandeen <sandeen@sandeen.net>
wrote:
> KELEMEN Peter wrote:
>> Eric has pointed out that verify_set_primary_sb() will either
>> return 1 or XR_INSUFF_SEC_SB. Move the check lower into
>> verify_set_primary_sb() by checking the return value of
>> verify_sb(). Example output:
>>
>> found candidate secondary superblock...
>> verifying sb at 31249334272: bad magic number (1)
>> verifying sb at 62498668544: bad magic number (1)
>> verifying sb at 93748002816: bad magic number (1)
>> verifying sb at 124997337088: bad magic number (1)
>> unable to verify superblock, continuing...
>>
>
> This looks better :) You may want to add even more info...
>
> while it's just searching block by block, if it finds a candidate, I'd
> print the sector offset for that candidate (your first output line).
>
> And rather than "verifying sb at..." you might do something like
> "comparing to sb N at offset X":
>
> + } else {
> + do_warn("comparing with sb %d at sector %Lu failed: %s (%d)\n",
> + agno, off, err_string(reason), reason);
>
> because at this point it's using the geometry of the candidate sb to see
> if it can be used to find enough other valid sb's....
Do I check in the patch as is or will there be an update?
Regards,
Barry.
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2008-10-22 18:36 [PATCH] xfs_repair: print superblock offsets and denial reasons KELEMEN Peter
2008-10-22 23:41 ` [PATCH V2] xfs_repair: print superblock offsets and why they can't be verified KELEMEN Peter
2008-10-23 13:53 ` Eric Sandeen
2008-10-23 14:24 ` Eric Sandeen
2008-11-21 1:03 ` Barry Naujok
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