[LU-8858] o_lcookie is not swabbed properly

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.8.0
• Affects Version/s: Lustre 1.8.x (1.8.0 - 1.8.5), Lustre 2.1.6
• Severity: 3
• Assignee: WC Triage
• Reporter: Wang Shilong (Inactive)

Description

We hit a problem when using Sparc Client vs x86_64 Lustre server(Server is 2.1.6)

Call Trace:
[<ffffffff886ed601>] libcfs_debug_dumpstack+0x51/0x60 [libcfs]
[<ffffffff886edb08>] lbug_with_loc+0x48/0x90 [libcfs]
[<ffffffff89032f87>] filter_cancel_cookies_cb+0x1e7/0x5a0 [obdfilter]
[<ffffffff88e2b7c7>] fsfilt_ldiskfs_cb_func+0x17/0x160 [fsfilt_ldiskfs]
[<ffffffff88d46b00>] jbd2_journal_commit_transaction+0xbb8/0x1120 [jbd2]
[<ffffffff8003dddd>] lock_timer_base+0x1b/0x3c
[<ffffffff88d4a2c3>] kjournald2+0x9a/0x1ec [jbd2]
[<ffffffff800a3cdf>] autoremove_wake_function+0x0/0x2e
[<ffffffff88d4a229>] kjournald2+0x0/0x1ec [jbd2]
[<ffffffff800a3ac7>] keventd_create_kthread+0x0/0xc4
[<ffffffff80032c4f>] kthread+0xfe/0x132
[<ffffffff8005dfc1>] child_rip+0xa/0x11
[<ffffffff800a3ac7>] keventd_create_kthread+0x0/0xc4
[<ffffffff80032b51>] kthread+0x0/0x132
[<ffffffff8005dfb7>] child_rip+0x0/0x11

Kernel panic - not syncing: LBUG

But we could mount x86_64 client using same Lustre version, problems seems come to
o_lcookie is not swabbed properly so that it caused problems. and we applied fix, Sparc
client could mount Server without problems.

I still could not see where master branch fix the problem, so i think latest master branch
aslo have this problem.