From: John L. Hammond <john.hamm...@intel.com>

In the LL_IOC_HSM_CT_START case of ll_dir_ioctl() require
CAP_SYS_ADMIN, since the local handler for this ioctl may modify the
global KUC table.

Signed-off-by: John L. Hammond <john.hamm...@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3866
Reviewed-on: http://review.whamcloud.com/7565
Reviewed-by: Aurelien Degremont <aurelien.degrem...@cea.fr>
Reviewed-by: Faccini Bruno <bruno.facc...@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xi...@intel.com>
Reviewed-by: Oleg Drokin <oleg.dro...@intel.com>
Signed-off-by: James Simmons <jsimm...@infradead.org>
---
 drivers/staging/lustre/lustre/llite/dir.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/dir.c 
b/drivers/staging/lustre/lustre/llite/dir.c
index 45bdf8f..94f3800 100644
--- a/drivers/staging/lustre/lustre/llite/dir.c
+++ b/drivers/staging/lustre/lustre/llite/dir.c
@@ -1844,6 +1844,9 @@ out_quotactl:
                return rc;
        }
        case LL_IOC_HSM_CT_START:
+               if (!capable(CFS_CAP_SYS_ADMIN))
+                       return -EPERM;
+
                rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void __user *)arg,
                                    sizeof(struct lustre_kernelcomm));
                return rc;
-- 
1.7.1

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