[LU-15372] add projid to changelog

Duplicate — Sat, 9 Dec 2023 00:20:07 +0000

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.

Whamcloud Community JIRA

[LU-15372] add projid to changelog