Lustre 1.6 Operations Manual

Description
The llapi_quotactl() command manipulates disk quotas on a Lustre filesystem mnt.
qc_cmd indicates a command to be applied to UID qc_id or GID qc_id.
Option
Description
LUSTRE_Q_QUOTAON
Turns on quotas for a Lustre filesystem. qc_type is USRQUOTA, GRPQUOTA or
UGQUOTA (both user and group quota). The quota files must exist. They are
normally created with the llapi_quotacheck(3) call. This call is restricted to the
super user privilege.
LUSTRE_Q_QUOTAOFF
Turns off quotas for a Lustre filesystem. qc_type is USRQUOTA, GRPQUOTA or
UGQUOTA (both user and group quota). This call is restricted to the super user
privilege.
LUSTRE_Q_GETQUOTA
Gets disk quota limits and current usage for user or group qc_id. qc_type is
USRQUOTA or GRPQUOTA. UUID may be filled with OBD UUID string to query
quota information from a specific node. dqb_valid may be set nonzero to query
information only from MDS. If UUID is an empty string and dqb_valid is zero then
clusterwide limits and usage are returned. On return, obd_dqblk contains the
requested information (block limits unit is kilobyte). Quotas must be turned on
before using this command.
LUSTRE_Q_SETQUOTA
Sets disk quota limits for user or group qc_id. qc_type is USRQUOTA or
GRPQUOTA. dqb_valid mus be set to QIF_ILIMITS, QIF_BLIMITS or
QIF_LIMITS (both inode limits and block limits) dependent on updating limits.
obd_dqblk must be filled with limits values (as set in dqb_valid, block limits unit is
kilobyte). Quotas must be turned on before using this command.
LUSTRE_Q_GETINFO
Gets information about quotas. qc_type is either USRQUOTA or GRPQUOTA. On
return, dqi_igrace is inode grace time (in seconds), dqi_bgrace is block grace time
(in seconds), dqi_flags is not used by the current Lustre version.
LUSTRE_Q_SETINFO
Sets quota information (like grace times). qc_type is either USRQUOTA or
GRPQUOTA. dqi_igrace is inode grace time (in seconds), dqi_bgrace is block grace
time (in seconds), dqi_flags is not used by the current Lustre version and must be
zeroed.
Chapter 30 Setting Lustre Properties (man3) 30-7