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drbd: Work on permission enforcement 

Now we have the capabilities of the sending process available,
use them to enforce CAP_SYS_ADMIN.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Philipp Reisner 2009-10-06 09:30:14 +02:00 committed by Jens Axboe
parent 25d2d4edfa
commit 9f5180e5c3
2 changed files with 7 additions and 1 deletions
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7
drivers/block/drbd/drbd_nl.c
View File

@ -2000,7 +2000,7 @@ static struct cn_handler_struct cnd_table[] = {
[ P_new_c_uuid ] = { &drbd_nl_new_c_uuid, 0 },
};
static void drbd_connector_callback(struct cn_msg *req)
static void drbd_connector_callback(struct cn_msg *req, struct netlink_skb_parms *nsp)
{
struct drbd_nl_cfg_req *nlp = (struct drbd_nl_cfg_req *)req->data;
struct cn_handler_struct *cm;
@ -2017,6 +2017,11 @@ static void drbd_connector_callback(struct cn_msg *req)
return;
}
if (!cap_raised(nsp->eff_cap, CAP_SYS_ADMIN)) {
retcode = ERR_PERM;
goto fail;
}
mdev = ensure_mdev(nlp);
if (!mdev) {
retcode = ERR_MINOR_INVALID;

1
include/linux/drbd.h
View File

@ -138,6 +138,7 @@ enum drbd_ret_codes {
ERR_VERIFY_RUNNING = 149, /* DRBD 8.2 only */
ERR_DATA_NOT_CURRENT = 150,
ERR_CONNECTED = 151, /* DRBD 8.3 only */
ERR_PERM = 152,
/* insert new ones above this line */
AFTER_LAST_ERR_CODE