[LU-15635] ext4_(inc|dec)_count removed handle_t arg breaking 5.10 server

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0, Lustre 2.15.1
• Severity: 3
• Assignee: Shaun Tancheff
• Reporter: Shaun Tancheff

Description

Linux v5.9-rc7-8-g15ed2851b0f4
ext4: remove unused argument from ext4_(inc|dec)_count

This breaks when the 'handle' is treated as inode with random crashes like the following:

PID: 1901   TASK: ffff8a4d4151c740  CPU: 0   COMMAND: "mount.lustre"
 #0 [ffffafe480aef6b0] panic at ffffffffb0f54b17
    /home/shaun/rpmbuild/BUILD/kernel-5.10.9/linux-5.10.9-1.ldiskfs.el8.x86_64/kernel/panic.c: 360
 #1 [ffffafe480aef750] no_context at ffffffffb066a2f9
    /home/shaun/rpmbuild/BUILD/kernel-5.10.9/linux-5.10.9-1.ldiskfs.el8.x86_64/arch/x86/mm/fault.c: 747
 #2 [ffffafe480aef7b8] exc_page_fault at ffffffffb0f953c3
    /home/shaun/rpmbuild/BUILD/kernel-5.10.9/linux-5.10.9-1.ldiskfs.el8.x86_64/arch/x86/mm/fault.c: 1320
 #3 [ffffafe480aef810] asm_exc_page_fault at ffffffffb1000ade
    /home/shaun/rpmbuild/BUILD/kernel-5.10.9/linux-5.10.9-1.ldiskfs.el8.x86_64/./arch/x86/include/asm/idtentry.h: 583
    [exception RIP: inc_nlink+32]
    RIP: ffffffffb0934f80  RSP: ffffafe480aef8c0  RFLAGS: 00010202
    RAX: 0000000100037655  RBX: ffff8a4d4467ddc8  RCX: 0000000000000000
    RDX: 0000000000000001  RSI: ffff8a4d44792bd0  RDI: ffff8a4d4467ddc8
    RBP: ffff8a4d44792bd0   R8: 000000000000004c   R9: 0000000000000003
    R10: 0000000000000000  R11: ffff8a4d41ba8700  R12: ffff8a4d41ba8700
    R13: ffffafe480aefb40  R14: ffff8a4d43961800  R15: ffff8a4d41ba8b00
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
    /home/shaun/rpmbuild/BUILD/kernel-5.10.9/linux-5.10.9-1.ldiskfs.el8.x86_64/./arch/x86/include/asm/atomic64_64.h: 102
 #4 [ffffafe480aef8c0] ldiskfs_inc_count at ffffffffc0a4ca9e [ldiskfs]
 #5 [ffffafe480aef8d0] osd_ref_add at ffffffffc15fcd65 [osd_ldiskfs]
 #6 [ffffafe480aef8f8] __local_file_create at ffffffffc0cff324 [obdclass]
 #7 [ffffafe480aef950] local_file_find_or_create at ffffffffc0cffd37 [obdclass]
 #8 [ffffafe480aef9a0] mgs_fs_setup at ffffffffc1686712 [mgs]
 #9 [ffffafe480aefa00] mgs_init0 at ffffffffc16821ad [mgs]
#10 [ffffafe480aefae0] mgs_device_alloc at ffffffffc1682c7a [mgs]

Issue Links

• is related to: LU-14195 Support for linux kernel version 5.10