[LU-2809] fix ll_setxattr() to always ignore ll_stripe_offset

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: Lustre 2.4.0, Lustre 2.1.5
• Fix Version/s: Lustre 2.4.0
• Labels: MB
• Severity: 3
• Assignee: Jinshan Xiong (Inactive)
• Reporter: Andreas Dilger

Description

With the introduction of lum_layout_version field to lov_user_md, using "tar --xattr" to backup and restore the Lustre layout (LOV EA) will incorrectly pass the lum_layout_version value back to ll_setxattr() as lum_stripe_offset. This will incorrectly turn the layout version into the starting OST index, for cases where the version is within [1,max_ost_idx].

This may cause, for example, all files that have been migrated once to be restored by tar onto OST1.

Issue Links

• is related to: LU-2871 Data can't be striped across all the OSTs correctly by running "lfs setstripe -c -1 -i n" (n>0)
• is related to: LU-2182 Add llapi_file_get_layout() function in liblustreapi