[LU-13717] Client-side encryption - support file name encryption

• Type: New Feature
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.15.0
• Labels: encryption sec
• Assignee: Sebastien Buisson
• Reporter: Sebastien Buisson

Description

This ticket is a place-holder to describe work to be done for client-side file name encryption. This is a follow-up of LU-12275, so all principles and concepts detailed there are still valid.

In particular, filename encryption principles are explained in this document:
https://jira.whamcloud.com/secure/attachment/32657/lustre_encryption_modes_usage.txt

Further details will be added as the feature design makes progress.

Issue Links

• is related to: LU-15027 sanity-sec: crash in __list_add_valid() during sanity-sec test_47
• is related to: LU-15406 Using the native fscrypt for Ubuntu20 5.4 kernel fails several migration test
• is related to: LU-15407 fscrypt does not work on Ubuntu 5.8 kernel
• is related to: LU-15810 Migrated encrypted directory lacks on-disk encryption flag and context
• is related to: LU-15922 Interop: sanity-sec test_46: File name too long
• is related to: LU-15848 ldiskfs: escape encrypted file names
• is related to: LU-15827 BUG: KASAN: slab-out-of-bounds in osd_ldiskfs_filldir+0x16c2/0x1860 [osd_ldiskfs]
• is related to: LU-16085 Ubuntu 22.04 sanityn test_106c: supported stx_attributes: got '2030', expected '30'
• is related to: LU-15928 pass key length as part of index API
• is related to: LU-15787 clients built without encryption support can corrupt encrypted directories
• is related to: LU-15855 Return -ENOKEY to encrypt-unaware clients if filename is missing
• is related to: LU-15911 Make enable_filename_encryption tunable only available with embedded llcrypt
• is related to: LU-12275 Client-side file data encryption
• is related to: LU-14677 lfs migrate/mirror of encrypted files