[LU-8454] non-root user is able to change stripe size for mount point

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.9.0, Lustre 2.14.0
• Affects Version/s: Lustre 2.8.0
• Severity: 3
• Assignee: Lai Siyao
• Reporter: Lai Siyao

Description

A non-root user is able to setstripe on the mount point to -1, with the owner:group of the mounted point being root:root and mode 0755. This causes all users of the file system to get wide stripes as the default, which is undesirable.

Issue Links

• is related to: LU-7661 MGS_SET_INFO handler is too permissive
• is related to: LU-7660 FS default striping settings only honored on MDT 0

Comments

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/38106/
Subject: LU-8454 Remove struct mgs_send_param and its users
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 66b4fd4317f9bd721aaa485c81987cecc049d92f

[Gerrit Updater]

Oleg Drokin ([e-mail]) uploaded a new patch: https://review.whamcloud.com/38106
Subject: LU-8454 Remove struct mgs_send_param and its users
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: b1cd84c6b037f7b872478e05c5c8345b9d5fc421

[Peter Jones]

Landed for 2.9

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch http://review.whamcloud.com/22580/
Subject: LU-8454 mountconf: delay FS default stripe config setting
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 85a7f5801013636284f93fdf0861476c19567ebd

[Gerrit Updater]

Lai Siyao ([e-mail]) uploaded a new patch: http://review.whamcloud.com/22580
Subject: LU-8454 mountconf: delay FS default stripe config setting
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: bd925f04723f60e469c5c8da741ea9edb009bc8b

[Andreas Dilger]

The change to store the default layout on the root directory was only landed to 2.9.0 via LU-7660, so disabling this feature in 2.10 already is too agressive. That means a 2.10+ client mounting a 2.8 server will not be able to set the default layout properly.

Probably something like > 2.13.53 (i.e. for 2.14 release) is more appropriate, since that would be at least one major maintenance release cycle (usually 3x point releases) beyond the first major maintenance release that it will appear in (somewhere around 2.10 or 2.11).

Also, in addition to removing the code in ll_set_dirstripe() on the client, it also needs to #ifdef ll_send_mgc_param(), mgc_set_mgs_param(), and KEY_SET_INFO in mgc_set_info_async(), since they will all be unused at that point and if that code isn't tagged now for removal it will just sit there dead and/or create compiler warnings.

Also, the code on the MGS that handles these parameters needs to be #ifdef'd, namely mgs_set_info(), as well as struct mgs_send_param and associated code in wirecheck.c and wiretest.c, since that RPC codepath was already limited to handling only the lov.stripe_* parameters in LU-7661 and will now be completely dead. We might consider to push this out a bit beyond 2.13.52 to allow older clients to continue to work with newer servers, but not much further, e.g. 2.15.52.

[Peter Jones]

Landed for 2.9

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch http://review.whamcloud.com/21612/
Subject: LU-8454 llite: normal user can't set FS default stripe
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: a2ba6c0c6e7b22ae31280253cd916fa3e29bd749

[Gerrit Updater]

Lai Siyao ([e-mail]) uploaded a new patch: http://review.whamcloud.com/21612
Subject: LU-8454 llite: normal user can't set FS default stripe
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: e5c12038a4379226bbc00f958e62120347b7c18b