Gang He
2020-Jul-03 03:41 UTC
[Ocfs2-devel] [PATCH 4/4] ocfs2: fix value of OCFS2_INVALID_SLOT
Hi Joseph and All, On 7/2/2020 10:13 PM, Joseph Qi wrote:> Hi Gang, > From the call tree it seems has relation with steal slot. > Could you try the following patch in linux-next: > 88b4270f4999 ("ocfs2: change slot number type s16 to u16")When I delete the commit(9277f8 ocfs2: fix value of OCFS2_INVALID_SLOT), the problem (as below) does not happen again. I will try the patch(88b4270f4999 ocfs2: change slot number type s16 to u16), to see if which can help the commit 9277f8. Thanks Gang> > Thanks, > Joseph > > On 2020/7/2 16:48, Gang He wrote: >> Hello Junxiao, >> >> Thank for your patches, which looks to fix the nfsd access problem. >> But the patches bring a new bug, like below, >> >> [ 251.406698] BUG: unable to handle kernel paging request at >> 0000565336a6bdf8 >> [ 251.406706] #PF error: [WRITE] >> [ 251.406710] PGD 0 P4D 0 >> [ 251.406717] Oops: 0002 [#1] SMP PTI >> [ 251.406724] CPU: 3 PID: 3758 Comm: mkdir Tainted: G OE >> 5.0.6-1-default #1 openSUSE Tumbleweed (unreleased) >> [ 251.406729] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), >> BIOS rel-1.8.1-0-g4adadbd-20151112_172657-sheep25 04/01/2014 >> [ 251.406739] RIP: 0010:_raw_spin_lock+0xc/0x20 >> [ 251.406743] Code: 02 00 00 f0 0f c1 03 a9 ff 01 00 00 75 06 48 89 e8 >> 5b 5d c3 48 89 df e8 a2 4f 87 ff eb f0 0f 1f 44 00 00 31 c0 ba 01 00 00 >> 00 <f0> 0f b1 17 75 01 c3 89 c6 e8 76 3a 87 ff 66 90 c3 0f 1f 00 0f 1f >> [ 251.406750] RSP: 0018:ffffb65401087bf0 EFLAGS: 00010246 >> [ 251.406755] RAX: 0000000000000000 RBX: 0000565336a6bd70 RCX: >> 00000000ffffffff >> [ 251.406759] RDX: 0000000000000001 RSI: 0000000000000009 RDI: >> 0000565336a6bdf8 >> [ 251.406763] RBP: 0000565336a6bdf8 R08: 0000000000000000 R09: >> 0000000000000000 >> [ 251.406767] R10: 0000000000000005 R11: ffff9d7ded1bb000 R12: >> ffff9d7e38c559d0 >> [ 251.406771] R13: ffff9d7e39354be8 R14: ffff9d7e393540c8 R15: >> 00000000ffffffff >> [ 251.406777] FS: 00007f32d9e39c40(0000) GS:ffff9d7e3db80000(0000) >> knlGS:0000000000000000 >> [ 251.406782] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> [ 251.406788] CR2: 0000565336a6bdf8 CR3: 0000000076496000 CR4: >> 00000000000006e0 >> [ 251.406801] Call Trace: >> [ 251.406824] igrab+0x19/0x50 >> [ 251.406941] ocfs2_get_system_file_inode+0x65/0x2e0 [ocfs2] >> [ 251.406980] ? ocfs2_find_entry+0x354/0x7f0 [ocfs2] >> [ 251.407025] ocfs2_reserve_suballoc_bits+0x3b/0x450 [ocfs2] >> [ 251.407070] ocfs2_steal_resource+0x8d/0x100 [ocfs2] >> [ 251.407113] ocfs2_reserve_new_inode+0x97/0x3d0 [ocfs2] >> [ 251.407154] ocfs2_mknod+0x3a7/0xe70 [ocfs2] >> [ 251.407191] ? __ocfs2_cluster_unlock.isra.47+0x24/0xd0 [ocfs2] >> [ 251.407231] ocfs2_mkdir+0x33/0x120 [ocfs2] >> [ 251.407239] ? inode_permission+0xbe/0x180 >> [ 251.407244] vfs_mkdir+0x102/0x1b0 >> [ 251.407250] do_mkdirat+0xd9/0x100 >> [ 251.407258] do_syscall_64+0x60/0x110 >> [ 251.407265] entry_SYSCALL_64_after_hwframe+0x49/0xbe >> [ 251.407271] RIP: 0033:0x7f32d9fbf307 >> [ 251.407276] Code: 1f 40 00 48 8b 05 91 eb 0c 00 64 c7 00 5f 00 00 00 >> b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f >> 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 61 eb 0c 00 f7 d8 64 89 01 48 >> [ 251.407283] RSP: 002b:00007fff36999c98 EFLAGS: 00000202 ORIG_RAX: >> 0000000000000053 >> [ 251.407289] RAX: ffffffffffffffda RBX: 00007fff3699b618 RCX: >> 00007f32d9fbf307 >> [ 251.407294] RDX: 0000000000000000 RSI: 00000000000001ff RDI: >> 00007fff3699b618 >> [ 251.407298] RBP: 00007fff3699b618 R08: 00000000000001ff R09: >> 000055a9fe8b2c00 >> >> I feel the problem looks related to this patch. >> >> Thanks >> Gang >> >> On 6/17/2020 2:38 AM, Junxiao Bi wrote: >>> >From ocfs2 disk layout, slot number is 16 bits, but in ocfs2 implemtation, >>> slot number is 32 bits, usually this will not cause any issue, because >>> slot number is converting from u16 to u32, but OCFS2_INVALID_SLOT was >>> defined as -1, when an invalid slot number from disk was got, it value >>> was (u16)-1, and it was converted to u32, then the following checking >>> in get_local_system_inode will be always skipped. >>> >>> static struct inode **get_local_system_inode(struct ocfs2_super *osb, >>> int type, >>> u32 slot) >>> { >>> BUG_ON(slot == OCFS2_INVALID_SLOT); >>> ... >>> } >>> >>> Signed-off-by: Junxiao Bi <junxiao.bi at oracle.com> >>> --- >>> fs/ocfs2/ocfs2_fs.h | 2 +- >>> 1 file changed, 1 insertion(+), 1 deletion(-) >>> >>> diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h >>> index 3fc99659ed09..19137c6d087b 100644 >>> --- a/fs/ocfs2/ocfs2_fs.h >>> +++ b/fs/ocfs2/ocfs2_fs.h >>> @@ -290,7 +290,7 @@ >>> #define OCFS2_MAX_SLOTS 255 >>> >>> /* Slot map indicator for an empty slot */ >>> -#define OCFS2_INVALID_SLOT -1 >>> +#define OCFS2_INVALID_SLOT ((u16)-1) >>> >>> #define OCFS2_VOL_UUID_LEN 16 >>> #define OCFS2_MAX_VOL_LABEL_LEN 64 >>> >> >> >> _______________________________________________ >> Ocfs2-devel mailing list >> Ocfs2-devel at oss.oracle.com >> https://oss.oracle.com/mailman/listinfo/ocfs2-devel >> >
Gang He
2020-Jul-03 08:41 UTC
[Ocfs2-devel] [PATCH 4/4] ocfs2: fix value of OCFS2_INVALID_SLOT
Hi Guys, On 7/3/2020 11:41 AM, Gang He wrote:> Hi Joseph and All, > > On 7/2/2020 10:13 PM, Joseph Qi wrote: >> Hi Gang, >> From the call tree it seems has relation with steal slot. >> Could you try the following patch in linux-next: >> 88b4270f4999 ("ocfs2: change slot number type s16 to u16") > When I delete the commit(9277f8 ocfs2: fix value of OCFS2_INVALID_SLOT), > the problem (as below) does not happen again. > I will try the patch(88b4270f4999 ocfs2: change slot number type s16 to > u16), to see if which can help the commit 9277f8.Apply the patch (88b4270f4999 ocfs2: change slot number type s16 to u16), the problem does not happen. That means this patch fixed the patch (9277f8334ffc ocfs2: fix value of OCFS2_INVALID_SLOT). Thanks Gang> > Thanks > Gang > > >> >> Thanks, >> Joseph >> >> On 2020/7/2 16:48, Gang He wrote: >>> Hello Junxiao, >>> >>> Thank for your patches, which looks to fix the nfsd access problem. >>> But the patches bring a new bug, like below, >>> >>> [ 251.406698] BUG: unable to handle kernel paging request at >>> 0000565336a6bdf8 >>> [ 251.406706] #PF error: [WRITE] >>> [ 251.406710] PGD 0 P4D 0 >>> [ 251.406717] Oops: 0002 [#1] SMP PTI >>> [ 251.406724] CPU: 3 PID: 3758 Comm: mkdir Tainted: G OE >>> 5.0.6-1-default #1 openSUSE Tumbleweed (unreleased) >>> [ 251.406729] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), >>> BIOS rel-1.8.1-0-g4adadbd-20151112_172657-sheep25 04/01/2014 >>> [ 251.406739] RIP: 0010:_raw_spin_lock+0xc/0x20 >>> [ 251.406743] Code: 02 00 00 f0 0f c1 03 a9 ff 01 00 00 75 06 48 89 e8 >>> 5b 5d c3 48 89 df e8 a2 4f 87 ff eb f0 0f 1f 44 00 00 31 c0 ba 01 00 00 >>> 00 <f0> 0f b1 17 75 01 c3 89 c6 e8 76 3a 87 ff 66 90 c3 0f 1f 00 0f 1f >>> [ 251.406750] RSP: 0018:ffffb65401087bf0 EFLAGS: 00010246 >>> [ 251.406755] RAX: 0000000000000000 RBX: 0000565336a6bd70 RCX: >>> 00000000ffffffff >>> [ 251.406759] RDX: 0000000000000001 RSI: 0000000000000009 RDI: >>> 0000565336a6bdf8 >>> [ 251.406763] RBP: 0000565336a6bdf8 R08: 0000000000000000 R09: >>> 0000000000000000 >>> [ 251.406767] R10: 0000000000000005 R11: ffff9d7ded1bb000 R12: >>> ffff9d7e38c559d0 >>> [ 251.406771] R13: ffff9d7e39354be8 R14: ffff9d7e393540c8 R15: >>> 00000000ffffffff >>> [ 251.406777] FS: 00007f32d9e39c40(0000) GS:ffff9d7e3db80000(0000) >>> knlGS:0000000000000000 >>> [ 251.406782] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >>> [ 251.406788] CR2: 0000565336a6bdf8 CR3: 0000000076496000 CR4: >>> 00000000000006e0 >>> [ 251.406801] Call Trace: >>> [ 251.406824] igrab+0x19/0x50 >>> [ 251.406941] ocfs2_get_system_file_inode+0x65/0x2e0 [ocfs2] >>> [ 251.406980] ? ocfs2_find_entry+0x354/0x7f0 [ocfs2] >>> [ 251.407025] ocfs2_reserve_suballoc_bits+0x3b/0x450 [ocfs2] >>> [ 251.407070] ocfs2_steal_resource+0x8d/0x100 [ocfs2] >>> [ 251.407113] ocfs2_reserve_new_inode+0x97/0x3d0 [ocfs2] >>> [ 251.407154] ocfs2_mknod+0x3a7/0xe70 [ocfs2] >>> [ 251.407191] ? __ocfs2_cluster_unlock.isra.47+0x24/0xd0 [ocfs2] >>> [ 251.407231] ocfs2_mkdir+0x33/0x120 [ocfs2] >>> [ 251.407239] ? inode_permission+0xbe/0x180 >>> [ 251.407244] vfs_mkdir+0x102/0x1b0 >>> [ 251.407250] do_mkdirat+0xd9/0x100 >>> [ 251.407258] do_syscall_64+0x60/0x110 >>> [ 251.407265] entry_SYSCALL_64_after_hwframe+0x49/0xbe >>> [ 251.407271] RIP: 0033:0x7f32d9fbf307 >>> [ 251.407276] Code: 1f 40 00 48 8b 05 91 eb 0c 00 64 c7 00 5f 00 00 00 >>> b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f >>> 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 61 eb 0c 00 f7 d8 64 89 01 48 >>> [ 251.407283] RSP: 002b:00007fff36999c98 EFLAGS: 00000202 ORIG_RAX: >>> 0000000000000053 >>> [ 251.407289] RAX: ffffffffffffffda RBX: 00007fff3699b618 RCX: >>> 00007f32d9fbf307 >>> [ 251.407294] RDX: 0000000000000000 RSI: 00000000000001ff RDI: >>> 00007fff3699b618 >>> [ 251.407298] RBP: 00007fff3699b618 R08: 00000000000001ff R09: >>> 000055a9fe8b2c00 >>> >>> I feel the problem looks related to this patch. >>> >>> Thanks >>> Gang >>> >>> On 6/17/2020 2:38 AM, Junxiao Bi wrote: >>>> >From ocfs2 disk layout, slot number is 16 bits, but in ocfs2 implemtation, >>>> slot number is 32 bits, usually this will not cause any issue, because >>>> slot number is converting from u16 to u32, but OCFS2_INVALID_SLOT was >>>> defined as -1, when an invalid slot number from disk was got, it value >>>> was (u16)-1, and it was converted to u32, then the following checking >>>> in get_local_system_inode will be always skipped. >>>> >>>> static struct inode **get_local_system_inode(struct ocfs2_super *osb, >>>> int type, >>>> u32 slot) >>>> { >>>> BUG_ON(slot == OCFS2_INVALID_SLOT); >>>> ... >>>> } >>>> >>>> Signed-off-by: Junxiao Bi <junxiao.bi at oracle.com> >>>> --- >>>> fs/ocfs2/ocfs2_fs.h | 2 +- >>>> 1 file changed, 1 insertion(+), 1 deletion(-) >>>> >>>> diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h >>>> index 3fc99659ed09..19137c6d087b 100644 >>>> --- a/fs/ocfs2/ocfs2_fs.h >>>> +++ b/fs/ocfs2/ocfs2_fs.h >>>> @@ -290,7 +290,7 @@ >>>> #define OCFS2_MAX_SLOTS 255 >>>> >>>> /* Slot map indicator for an empty slot */ >>>> -#define OCFS2_INVALID_SLOT -1 >>>> +#define OCFS2_INVALID_SLOT ((u16)-1) >>>> >>>> #define OCFS2_VOL_UUID_LEN 16 >>>> #define OCFS2_MAX_VOL_LABEL_LEN 64 >>>> >>> >>> >>> _______________________________________________ >>> Ocfs2-devel mailing list >>> Ocfs2-devel at oss.oracle.com >>> https://oss.oracle.com/mailman/listinfo/ocfs2-devel >>> >> > > > _______________________________________________ > Ocfs2-devel mailing list > Ocfs2-devel at oss.oracle.com > https://oss.oracle.com/mailman/listinfo/ocfs2-devel >