[LU-15372] add projid to changelog

• Type: Improvement
• Resolution: Unresolved
• Priority: Minor
• Labels: lad23dd lug23dd medium
• Assignee: Arshad Hussain
• Reporter: Andreas Dilger

Description

It would be useful to record the projid of a file into the Lustre Changelog, so that this can be used to identify files within a specific subdirectory tree. This would use:

struct changelog_ext_projid {
        __u32 cr_projid;
        __u32 cr_flags;       /* FS_PROJINHERIT_FL and other ext4 flags */
};

enum changelog_rec_extra_flags {
        :
        CLFE_PROJID     = 0x0010,
};

It looks like there will be a bit of complexity when adding a record after changelog_ext_xattr because that structure sadly does not encode a length, but only a NUL-terminated string, so this should be rounded up to the next multiple of 4 bytes before the changelog_ext_projid record is stored.

Issue Links

• is related to: LU-12056 tar doesn't support project id
• is related to: LU-1996 Fine-grained job activity tracking using changelogs
• is related to: LU-9727 Lustre Audit with Changelogs
• is related to: LU-15373 changelog improvements tracking
• is related to: LU-12480 add STATX_PROJID to upstream kernel

Comments

[Gerrit Updater]

"Arshad Hussain <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/53190
Subject: LU-15372 mdd: Add projid CL support
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 1eed9804c49e498703bd403e139c62cce12dc7bd