[LU-14651] Linux kernel 5.12 support

• Type: Improvement
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.16.0, Lustre 2.15.0
• Affects Version/s: Lustre 2.15.0
• Environment: Any system running 5.12 kernel.
• Assignee: James A Simmons
• Reporter: James A Simmons

Description

The 5.12 Linux kernel has just been released. Moving the native Linux client to this version exposed various kernel API changes:

1) Support of IDMAPPED mounts. The impact on Lustre is struct user_namespace is passed to all VFS operations.  You can read about this feature at - https://lwn.net/Articles/842423

2) fscrypto API has been reworked.

3) Linux kernel will not build UAPI headers with our CONF_T_* values.

4) rdma_reject() returns an error string to print out.

5) setsockopt uses a new sockptr_t abstract to handle both userland and kernel space at the same tim.

Issue Links

• is related to: LU-15220 Linux kernel 5.14 support
• is related to: LU-12511 Prepare lustre for adoption into the linux kernel

Comments

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/47900/
Subject: LU-14651 ldiskfs: add 5.11 kernel support
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 7919255685d2080d619df71eecfa1545211b4ddb

[Gerrit Updater]

"James Simmons <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/47900
Subject: LU-14651 ldiskfs: add 5.11 kernel support
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: fcef425d3bf1236f6a3af7994b306f8425fff453

[Jian Yu]

No I never hit this issue before. Are you still hitting it?

The issue is fixed in LU-15939.

[James A Simmons]

No I never hit this issue before. Are you still hitting it?

[Jian Yu]

Hi simmonsja,

With the patches in this ticket I can get Ubuntu 21 5.13 kernel clients working.

After building Lustre codes on an Ubuntu 20.04 VirtualBox vm node with kernel 5.13.0-27-generic, I hit the following error while loading Lustre client module :

# modprobe lustre
modprobe: ERROR: could not insert 'lustre': Exec format error

kernel: [187850.110155] module: x86/modules: Skipping invalid relocation target, existing value is nonzero for type 1, loc 00000000cab2976e, val ffffffffc110f9f8

Have you ever hit the above issue?

[Peter Jones]

Landed for 2.15

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/46070/
Subject: LU-14651 build: remove KALLSYMS build requirement
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 8e04e4ff8a1d0807d107a65a2c1bf76aea9b4ce5

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/45938/
Subject: LU-14651 llite: extend inode methods with user namespace arg
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 0feec5a3c7d4518d5c563739124b202a6a0a99f7

[Gerrit Updater]

"James Simmons <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/46070
Subject: LU-14651 build: remove KALLSYMS build requirement
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 2901a756a1496e809627ad0d2e195256b8afbd4f

[James A Simmons]

With the patches in this ticket I can get Ubuntu 21 5.13 kernel clients working.

[Gerrit Updater]

"James Simmons <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/46054
Subject: LU-14651: uapi: fix gcc11 -Werror=stringop-overread
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 606273981d5ebabd4155bc5ab0fce5cad0c86854