[LU-1270] lfs find -size returns "obd_uuid: (null) failed No such device"

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.4.0
• Affects Version/s: Lustre 2.2.0, Lustre 2.3.0
• Environment: master branch
• Severity: 3
• Assignee: Zhenyu Xu
• Reporter: Zhenyu Xu

Description

reproduce procedure:

[mount a lustre filesystem on /mnt/lustre]
$ touch /mnt/lustre/a
$ lfs find -size +0 /mnt/lustre
/mnt/lustre
obd_uuid: (null) failed No such device

root cause:
In cb_find_init(), when a regular file's size or time to be checked, the code path goes under to

cb_find_init()

        while (!decision) {
                /* For regular files with the stripe the decision may have not
                 * been taken yet if *time or size is to be checked. */
                LASSERT((S_ISREG(st->st_mode) &&
                        param->lmd->lmd_lmm.lmm_stripe_count) ||
                        param->mdtindex != OBD_NOT_FOUND);

                if (param->obdindex != OBD_NOT_FOUND)
                        print_failed_tgt(param, path, LL_STATFS_LOV);

                if (param->mdtindex != OBD_NOT_FOUND)
                        print_failed_tgt(param, path, LL_STATFS_LMV);

And during the whole process, param->mdtindex hasn't initialized to OBD_NOT_FOUND, and print_failed_tgt() cannot find anything since none of obd uuid was specified in the process.

Issue Links

• is duplicated by: LU-341 Test failure on test suite sanity test_56r