[LU-5006] chown/chgrp doesn't work for files created by lfs setstripe

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.7.0
• Affects Version/s: Lustre 2.6.0, Lustre 2.5.1, Lustre 2.4.3
• Labels: HB
• Severity: 3
• Assignee: Niu Yawei (Inactive)
• Reporter: Niu Yawei (Inactive)

Description

This is easy to reproduce:

• lfs setstripe -c 1 -i 0 /mnt/lustre/a
• dd if=/dev/zero of=/mnt/lustre/a bs=1M count=1 conv=notrunc
• chown $ID /mnt/lustre/a

The uid on OST object will not be changed after chown.

Look into the code osp_attr_set():

        /* new object, the very first ->attr_set()
         * initializing attributes needs no logging
         * all subsequent one are subject to the
         * logging and synchronization with OST */
        if (o->opo_new) {
                o->opo_new = 0;
                RETURN(0);
        }

I don't quite see why this is necessary, but seems it'll break chown in above situation: OST object is created in 'dd' operation, and the first attr_set operation after create is the 'chown', and it's skipped.

Issue Links

• is related to: LU-5951 sanity test_39k: mtime is lost on close