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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/scsi/scsi_netlink.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/scsi/scsi_netlink.c')
-rw-r--r-- | kernel/drivers/scsi/scsi_netlink.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/kernel/drivers/scsi/scsi_netlink.c b/kernel/drivers/scsi/scsi_netlink.c new file mode 100644 index 000000000..109802f77 --- /dev/null +++ b/kernel/drivers/scsi/scsi_netlink.c @@ -0,0 +1,158 @@ +/* + * scsi_netlink.c - SCSI Transport Netlink Interface + * + * Copyright (C) 2006 James Smart, Emulex Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ +#include <linux/time.h> +#include <linux/jiffies.h> +#include <linux/security.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/export.h> +#include <net/sock.h> +#include <net/netlink.h> + +#include <scsi/scsi_netlink.h> +#include "scsi_priv.h" + +struct sock *scsi_nl_sock = NULL; +EXPORT_SYMBOL_GPL(scsi_nl_sock); + +/** + * scsi_nl_rcv_msg - Receive message handler. + * @skb: socket receive buffer + * + * Description: Extracts message from a receive buffer. + * Validates message header and calls appropriate transport message handler + * + * + **/ +static void +scsi_nl_rcv_msg(struct sk_buff *skb) +{ + struct nlmsghdr *nlh; + struct scsi_nl_hdr *hdr; + u32 rlen; + int err, tport; + + while (skb->len >= NLMSG_HDRLEN) { + err = 0; + + nlh = nlmsg_hdr(skb); + if ((nlh->nlmsg_len < (sizeof(*nlh) + sizeof(*hdr))) || + (skb->len < nlh->nlmsg_len)) { + printk(KERN_WARNING "%s: discarding partial skb\n", + __func__); + return; + } + + rlen = NLMSG_ALIGN(nlh->nlmsg_len); + if (rlen > skb->len) + rlen = skb->len; + + if (nlh->nlmsg_type != SCSI_TRANSPORT_MSG) { + err = -EBADMSG; + goto next_msg; + } + + hdr = nlmsg_data(nlh); + if ((hdr->version != SCSI_NL_VERSION) || + (hdr->magic != SCSI_NL_MAGIC)) { + err = -EPROTOTYPE; + goto next_msg; + } + + if (!netlink_capable(skb, CAP_SYS_ADMIN)) { + err = -EPERM; + goto next_msg; + } + + if (nlh->nlmsg_len < (sizeof(*nlh) + hdr->msglen)) { + printk(KERN_WARNING "%s: discarding partial message\n", + __func__); + goto next_msg; + } + + /* + * Deliver message to the appropriate transport + */ + tport = hdr->transport; + if (tport == SCSI_NL_TRANSPORT) { + switch (hdr->msgtype) { + case SCSI_NL_SHOST_VENDOR: + /* Locate the driver that corresponds to the message */ + err = -ESRCH; + break; + default: + err = -EBADR; + break; + } + if (err) + printk(KERN_WARNING "%s: Msgtype %d failed - err %d\n", + __func__, hdr->msgtype, err); + } + else + err = -ENOENT; + +next_msg: + if ((err) || (nlh->nlmsg_flags & NLM_F_ACK)) + netlink_ack(skb, nlh, err); + + skb_pull(skb, rlen); + } +} + +/** + * scsi_netlink_init - Called by SCSI subsystem to initialize + * the SCSI transport netlink interface + * + **/ +void +scsi_netlink_init(void) +{ + struct netlink_kernel_cfg cfg = { + .input = scsi_nl_rcv_msg, + .groups = SCSI_NL_GRP_CNT, + }; + + scsi_nl_sock = netlink_kernel_create(&init_net, NETLINK_SCSITRANSPORT, + &cfg); + if (!scsi_nl_sock) { + printk(KERN_ERR "%s: register of receive handler failed\n", + __func__); + return; + } + + return; +} + + +/** + * scsi_netlink_exit - Called by SCSI subsystem to disable the SCSI transport netlink interface + * + **/ +void +scsi_netlink_exit(void) +{ + if (scsi_nl_sock) { + netlink_kernel_release(scsi_nl_sock); + } + + return; +} + |