[LU-5005] lustre_rsync unable to replicate new files in root of the filesystem

• Status: Resolved
• Project: Lustre
• Affects Version/s: Lustre 2.6.0
• Fix Version/s: Lustre 2.6.0, Lustre 2.5.2
• Type: Bug
• Priority: Major
• Reporter: Oleg Drokin
• Assignee: Niu Yawei (Inactive)
• Resolution: Fixed
• Severity: 3

Description

It appears that lustre_rsync is unable to replicate new files and dirs i nthe root od new filesystem
The check for deleted files triggers like this:

***** Start 22 MKDIR (2) [0x200000400:0xa:0x0] [0x80001:0xd9558f05:0x0] aaa *****
dest = /aaa; savedpath = aaa                                            <----------------------------------------------------------------------- HERE!
create: file moved ([0x200000400:0xa:0x0]). /aaa != aaa
mkfile(2) /mnt/st04fs/.lustrerepl/[0x200000400:0xa:0x0] 

Reproducer is simple
enable changelogs, create /src/dir run lustre_rsync from /src to /dst and see how /dst/dir is not created, but instead there's a dir with a fid name in /dst/.lustrerepl

Comments

[Peter Jones]

Niu

Could you please create a fix for this issue?

Thanks

Peter

[Niu Yawei (Inactive)]

MDT assumes the path of ROOT is '\0', see mdt_path():

        if (lu_fid_eq(&mdt->mdt_md_root_fid, mdt_object_fid(obj))) {
                path[0] = '\0';
                RETURN(0);
        }

However, lustre_rsync assumes the path of ROOT is '/', see lr_create():

        if (len == 1 && info->path[0] == '/')
                snprintf(info->dest, PATH_MAX, "%s", info->name);

I think all lustre components should consider the path of ROOT as '/'.

[Niu Yawei (Inactive)]

patch against master: http://review.whamcloud.com/10211

[Peter Jones]

Landed for 2.6