[LU-16772] Protect lqe_glbl_data in qmt_site_recalc_cb with mutex

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0, Lustre 2.15.5
• Severity: 3
• Assignee: Sergey Cheremencev
• Reporter: Sergey Cheremencev

Description

lqe_glbl_data should be protected with lqe_glbl_data_lock in qmt_site_reaclc_sb like it did in other places to avoid crashing:

 Lustre: DEBUG MARKER: lctl pool_remove lustre.qpool1 lustre-OST0005_UUID
 Lustre: DEBUG MARKER: lctl pool_remove lustre.qpool1 lustre-OST0006_UUID
 BUG: unable to handle kernel NULL pointer dereference at 00000000000000d8
 IP: [<ffffffffc10c81d8>] qmt_site_recalc_cb+0x318/0x7e0 [lquota]
 Oops: 0000 [#1] SMP 
 CPU: 1 PID: 26035 Comm: qsd_reint_qpool Kdump: loaded 3.10.0-1160.53.1.el7.x86_64 #1
 Call Trace:
  [<ffffffffc09ab7ae>] cfs_hash_for_each_tight+0x11e/0x320 [libcfs]
  [<ffffffffc09aba20>] cfs_hash_for_each+0x10/0x20 [libcfs]
  [<ffffffffc10c9df4>] qmt_pool_recalc+0xa64/0x11f0 [lquota]
  [<ffffffffad4c5e61>] kthread+0xd1/0xe0

Issue Links

• is related to: LU-14434 parallel-scale-nfsv4 test compilebench crashes in qmt_id_lock_cb
• is related to: LU-16341 unable to handle kernel NULL in qmt_site_recalc_cb
• is related to: LU-15021 sanity-quota test_55: crash in qmt_seed_glbe_all()
• is related to: LU-16725 crash at qmt_free_lqe_gd+0xa/0x1f0