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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/block/drbd/drbd_nla.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/block/drbd/drbd_nla.c')
-rw-r--r-- | kernel/drivers/block/drbd/drbd_nla.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/kernel/drivers/block/drbd/drbd_nla.c b/kernel/drivers/block/drbd/drbd_nla.c new file mode 100644 index 000000000..b2d479149 --- /dev/null +++ b/kernel/drivers/block/drbd/drbd_nla.c @@ -0,0 +1,54 @@ +#include <linux/kernel.h> +#include <net/netlink.h> +#include <linux/drbd_genl_api.h> +#include "drbd_nla.h" + +static int drbd_nla_check_mandatory(int maxtype, struct nlattr *nla) +{ + struct nlattr *head = nla_data(nla); + int len = nla_len(nla); + int rem; + + /* + * validate_nla (called from nla_parse_nested) ignores attributes + * beyond maxtype, and does not understand the DRBD_GENLA_F_MANDATORY flag. + * In order to have it validate attributes with the DRBD_GENLA_F_MANDATORY + * flag set also, check and remove that flag before calling + * nla_parse_nested. + */ + + nla_for_each_attr(nla, head, len, rem) { + if (nla->nla_type & DRBD_GENLA_F_MANDATORY) { + nla->nla_type &= ~DRBD_GENLA_F_MANDATORY; + if (nla_type(nla) > maxtype) + return -EOPNOTSUPP; + } + } + return 0; +} + +int drbd_nla_parse_nested(struct nlattr *tb[], int maxtype, struct nlattr *nla, + const struct nla_policy *policy) +{ + int err; + + err = drbd_nla_check_mandatory(maxtype, nla); + if (!err) + err = nla_parse_nested(tb, maxtype, nla, policy); + + return err; +} + +struct nlattr *drbd_nla_find_nested(int maxtype, struct nlattr *nla, int attrtype) +{ + int err; + /* + * If any nested attribute has the DRBD_GENLA_F_MANDATORY flag set and + * we don't know about that attribute, reject all the nested + * attributes. + */ + err = drbd_nla_check_mandatory(maxtype, nla); + if (err) + return ERR_PTR(err); + return nla_find_nested(nla, attrtype); +} |