Hello,
I can trigger a BUG() at fs/xfs/xfs_dquot.c on vanilla kernel 3.3.0 by the following steps:
1. mount a XFS partition without 'pquota' option.
/dev/sda7 on /xfs type xfs (rw)
2. setup project1 on it.
$ cat /etc/projects
1:/xfs
$ cat /etc/projid
project1:1
$ sudo xfs_quota -x -c 'project -s project1' /xfs
3. du -sh /xfs
[ 170.024496] XFS: Assertion failed: XFS_IS_QUOTA_RUNNING(mp), file: fs/xfs/xfs_dquot.c, line: 680
[ 170.024534] ------------[ cut here ]------------
[ 170.024630] kernel BUG at fs/xfs/xfs_message.c:101!
[ 170.024718] invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC
[ 170.024836] Modules linked in: xfs cryptd aes_i586 aes_generic ....
[ 170.026787] Pid: 2082, comm: du Not tainted 3.3.0-dirty #48 LENOVO 7661D43/7661D43
[ 170.026950] EIP: 0060:[<f94892c4>] EFLAGS: 00010246 CPU: 1
[ 170.027126] EIP is at assfail+0x47/0x57 [xfs]
[ 170.027207] EAX: 0000006a EBX: e2031f58 ECX: 00000000 EDX: 00000007
[ 170.027319] ESI: 00000000 EDI: e364f000 EBP: e2031e88 ESP: e2031e74
[ 170.027432] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 170.027530] Process du (pid: 2082, ti=e2030000 task=e3096a80 task.ti=e2030000)
[ 170.027659] Stack:
[ 170.027702] 00000000 f9543fbb f95523d2 f955210c 000002a8 e2031ec0 f9521d2c 3432302e
[ 170.027912] 5d303834 00000020 e364f0dc 00000001 c13abe66 00000246 e2031eb4 00000246
[ 170.028015] e2031f58 e2031f58 e2b01880 e2031edc f9527edc 00000002 00000000 e2031ed4
[ 170.028015] Call Trace:
[ 170.028015] [<f9521d2c>] xfs_qm_dqget+0x4e/0x90d [xfs]
[ 170.028015] [<c13abe66>] ? do_raw_spin_lock+0xdc/0x1fd
[ 170.028015] [<f9527edc>] xfs_qm_statvfs+0x4e/0xa5 [xfs]
[ 170.028015] [<f948a666>] xfs_fs_statfs+0x2b0/0x2c8 [xfs]
[ 170.028015] [<c1263c8b>] statfs_by_dentry+0x82/0xc1
[ 170.028015] [<c1263cee>] vfs_statfs+0x24/0x12a
[ 170.028015] [<c1263ed8>] fd_statfs+0x55/0x81
[ 170.028015] [<c126407b>] sys_fstatfs64+0x3f/0x7a
[ 170.028015] [<c183071c>] syscall_call+0x7/0xb
[ 170.028015] Code: 10 89 54 24 0c 89 44 24 08 c7 44 24 04 bb 3f 54 f9 c7 04 24 00 ...
[ 170.028015] EIP: [<f94892c4>] assfail+0x47/0x57 [xfs] SS:ESP 0068:e2031e74
[ 170.083305] ---[ end trace 76dc24be29466355 ]---
IMHO, we can check if the project quota is running or not before performing xfs_qm_statvfs(), just return if not.
Signed-off-by: Jie Liu <jeff.liu@xxxxxxxxxx>
---
fs/xfs/xfs_super.c | 13 +++++++++----
1 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index ee5b695..dfc3666 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1059,10 +1059,15 @@ xfs_fs_statfs(
spin_unlock(&mp->m_sb_lock);
- if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
- ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
- (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
- xfs_qm_statvfs(ip, statp);
+ /* don't try to fill statvfs with project quota if it's not running */
+ if (XFS_IS_PQUOTA_RUNNING(mp)) {
+ if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
+ ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
+ (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD)) {
+ xfs_qm_statvfs(ip, statp);
+ }
+ }
+
return 0;
}
--
1.7.9
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