[LU-11417] Add llapi_layout_get_by_xattr() interface

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.12.0
• Labels: easy
• Assignee: Andreas Dilger
• Reporter: Andreas Dilger

Description

The code in llapi_layout_get_by_fd() should be abstracted into a new llapi_layout_get_by_xattr() helper function, which is used by the upper layers and can also be used on a "lov" xattr regardless of how it is obtained. That is useful if the xattr has been fetched from some other method, or a tarball or HSM archive, etc.

Issue Links

• is related to: LU-11974 Improve llapi_layout_get_by_xattr()

Comments

[Peter Jones]

Landed for 2.12

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/33230/
Subject: LU-11417 llapi: add llapi_layout_get_by_xattr(3) API
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 30d55877c30ca06db4003b70025fcc526e144569

[Gerrit Updater]

Andreas Dilger ([e-mail]) uploaded a new patch: https://review.whamcloud.com/33230
Subject: LU-11417 llapi: add llapi_layout_get_by_xattr(3) API
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 96825476a539c5a4374063c74f3fa447ac53d6db

[Andreas Dilger]

In fact, llapi_layout_from_lum() already exists, but it is currently a static internal interface that is passed a "struct lov_user_md" but that often isn't even the real structure type. It would be more useful to have the proposed llapi_layout_get_by_xattr(char *lov_user_md, size_t lum_size) interface as a thin wrapper for the internal interface.