* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/netlink.h>
#include <linux/connector.h>
return 0;
}
-static int w1_process_command_master(struct w1_master *dev, struct cn_msg *req_msg,
- struct w1_netlink_msg *req_hdr, struct w1_netlink_cmd *req_cmd)
-{
- int err = -EINVAL;
- struct cn_msg *msg;
- struct w1_netlink_msg *hdr;
- struct w1_netlink_cmd *cmd;
-
- msg = kzalloc(PAGE_SIZE, GFP_KERNEL);
- if (!msg)
- return -ENOMEM;
-
- msg->id = req_msg->id;
- msg->seq = req_msg->seq;
- msg->ack = 0;
- msg->len = sizeof(struct w1_netlink_msg) + sizeof(struct w1_netlink_cmd);
-
- hdr = (struct w1_netlink_msg *)(msg + 1);
- cmd = (struct w1_netlink_cmd *)(hdr + 1);
-
- hdr->type = W1_MASTER_CMD;
- hdr->id = req_hdr->id;
- hdr->len = sizeof(struct w1_netlink_cmd);
-
- cmd->cmd = req_cmd->cmd;
- cmd->len = 0;
-
- switch (cmd->cmd) {
- case W1_CMD_SEARCH:
- case W1_CMD_ALARM_SEARCH:
- err = w1_process_search_command(dev, msg,
- PAGE_SIZE - msg->len - sizeof(struct cn_msg));
- break;
- default:
- cmd->res = EINVAL;
- cn_netlink_send(msg, 0, GFP_KERNEL);
- break;
- }
-
- kfree(msg);
- return err;
-}
-
-static int w1_send_read_reply(struct w1_slave *sl, struct cn_msg *msg,
- struct w1_netlink_msg *hdr, struct w1_netlink_cmd *cmd)
+static int w1_send_read_reply(struct cn_msg *msg, struct w1_netlink_msg *hdr,
+ struct w1_netlink_cmd *cmd)
{
void *data;
struct w1_netlink_msg *h;
memcpy(c, cmd, sizeof(struct w1_netlink_cmd));
cm->ack = msg->seq+1;
- cm->len = sizeof(struct w1_netlink_msg) + sizeof(struct w1_netlink_cmd) + cmd->len;
+ cm->len = sizeof(struct w1_netlink_msg) +
+ sizeof(struct w1_netlink_cmd) + cmd->len;
h->len = sizeof(struct w1_netlink_cmd) + cmd->len;
return err;
}
-static int w1_process_command_slave(struct w1_slave *sl, struct cn_msg *msg,
+static int w1_process_command_io(struct w1_master *dev, struct cn_msg *msg,
struct w1_netlink_msg *hdr, struct w1_netlink_cmd *cmd)
{
int err = 0;
- dev_dbg(&sl->master->dev, "%s: %02x.%012llx.%02x: cmd=%02x, len=%u.\n",
- __func__, sl->reg_num.family, (unsigned long long)sl->reg_num.id, sl->reg_num.crc,
- cmd->cmd, cmd->len);
+ switch (cmd->cmd) {
+ case W1_CMD_TOUCH:
+ w1_touch_block(dev, cmd->data, cmd->len);
+ w1_send_read_reply(msg, hdr, cmd);
+ break;
+ case W1_CMD_READ:
+ w1_read_block(dev, cmd->data, cmd->len);
+ w1_send_read_reply(msg, hdr, cmd);
+ break;
+ case W1_CMD_WRITE:
+ w1_write_block(dev, cmd->data, cmd->len);
+ break;
+ default:
+ err = -EINVAL;
+ break;
+ }
+
+ return err;
+}
+
+static int w1_process_command_master(struct w1_master *dev, struct cn_msg *req_msg,
+ struct w1_netlink_msg *req_hdr, struct w1_netlink_cmd *req_cmd)
+{
+ int err = -EINVAL;
+ struct cn_msg *msg;
+ struct w1_netlink_msg *hdr;
+ struct w1_netlink_cmd *cmd;
+
+ msg = kzalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ msg->id = req_msg->id;
+ msg->seq = req_msg->seq;
+ msg->ack = 0;
+ msg->len = sizeof(struct w1_netlink_msg) + sizeof(struct w1_netlink_cmd);
+
+ hdr = (struct w1_netlink_msg *)(msg + 1);
+ cmd = (struct w1_netlink_cmd *)(hdr + 1);
+
+ hdr->type = W1_MASTER_CMD;
+ hdr->id = req_hdr->id;
+ hdr->len = sizeof(struct w1_netlink_cmd);
+
+ cmd->cmd = req_cmd->cmd;
+ cmd->len = 0;
switch (cmd->cmd) {
- case W1_CMD_TOUCH:
- w1_touch_block(sl->master, cmd->data, cmd->len);
- w1_send_read_reply(sl, msg, hdr, cmd);
- break;
- case W1_CMD_READ:
- w1_read_block(sl->master, cmd->data, cmd->len);
- w1_send_read_reply(sl, msg, hdr, cmd);
- break;
- case W1_CMD_WRITE:
- w1_write_block(sl->master, cmd->data, cmd->len);
- break;
- default:
- err = -1;
- break;
+ case W1_CMD_SEARCH:
+ case W1_CMD_ALARM_SEARCH:
+ err = w1_process_search_command(dev, msg,
+ PAGE_SIZE - msg->len - sizeof(struct cn_msg));
+ break;
+ case W1_CMD_READ:
+ case W1_CMD_WRITE:
+ case W1_CMD_TOUCH:
+ err = w1_process_command_io(dev, req_msg, req_hdr, req_cmd);
+ break;
+ case W1_CMD_RESET:
+ err = w1_reset_bus(dev);
+ break;
+ default:
+ err = -EINVAL;
+ break;
}
+ kfree(msg);
return err;
}
+static int w1_process_command_slave(struct w1_slave *sl, struct cn_msg *msg,
+ struct w1_netlink_msg *hdr, struct w1_netlink_cmd *cmd)
+{
+ dev_dbg(&sl->master->dev, "%s: %02x.%012llx.%02x: cmd=%02x, len=%u.\n",
+ __func__, sl->reg_num.family, (unsigned long long)sl->reg_num.id,
+ sl->reg_num.crc, cmd->cmd, cmd->len);
+
+ return w1_process_command_io(sl->master, msg, hdr, cmd);
+}
+
static int w1_process_command_root(struct cn_msg *msg, struct w1_netlink_msg *mcmd)
{
struct w1_master *m;
if (mcmd->type != W1_LIST_MASTERS) {
printk(KERN_NOTICE "%s: msg: %x.%x, wrong type: %u, len: %u.\n",
- __func__, msg->id.idx, msg->id.val, mcmd->type, mcmd->len);
+ __func__, msg->id.idx, msg->id.val, mcmd->type, mcmd->len);
return -EPROTO;
}
w = (struct w1_netlink_msg *)(cn + 1);
w->type = W1_LIST_MASTERS;
- w->reserved = 0;
+ w->status = 0;
w->len = 0;
id = (u32 *)(w + 1);
return 0;
}
-static void w1_cn_callback(void *data)
+static int w1_netlink_send_error(struct cn_msg *rcmsg, struct w1_netlink_msg *rmsg,
+ struct w1_netlink_cmd *rcmd, int error)
+{
+ struct cn_msg *cmsg;
+ struct w1_netlink_msg *msg;
+ struct w1_netlink_cmd *cmd;
+
+ cmsg = kzalloc(sizeof(*msg) + sizeof(*cmd) + sizeof(*cmsg), GFP_KERNEL);
+ if (!cmsg)
+ return -ENOMEM;
+
+ msg = (struct w1_netlink_msg *)(cmsg + 1);
+ cmd = (struct w1_netlink_cmd *)(msg + 1);
+
+ memcpy(cmsg, rcmsg, sizeof(*cmsg));
+ cmsg->len = sizeof(*msg);
+
+ memcpy(msg, rmsg, sizeof(*msg));
+ msg->len = 0;
+ msg->status = (short)-error;
+
+ if (rcmd) {
+ memcpy(cmd, rcmd, sizeof(*cmd));
+ cmd->len = 0;
+ msg->len += sizeof(*cmd);
+ cmsg->len += sizeof(*cmd);
+ }
+
+ error = cn_netlink_send(cmsg, 0, GFP_KERNEL);
+ kfree(cmsg);
+
+ return error;
+}
+
+static void w1_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
{
- struct cn_msg *msg = data;
struct w1_netlink_msg *m = (struct w1_netlink_msg *)(msg + 1);
struct w1_netlink_cmd *cmd;
struct w1_slave *sl;
dev = NULL;
sl = NULL;
+ cmd = NULL;
memcpy(&id, m->id.id, sizeof(id));
#if 0
}
if (sl)
- w1_process_command_slave(sl, msg, m, cmd);
+ err = w1_process_command_slave(sl, msg, m, cmd);
else
- w1_process_command_master(dev, msg, m, cmd);
+ err = w1_process_command_master(dev, msg, m, cmd);
+
+ w1_netlink_send_error(msg, m, cmd, err);
+ err = 0;
cmd_data += cmd->len + sizeof(struct w1_netlink_cmd);
mlen -= cmd->len + sizeof(struct w1_netlink_cmd);
atomic_dec(&sl->refcnt);
mutex_unlock(&dev->mutex);
out_cont:
+ if (!cmd || err)
+ w1_netlink_send_error(msg, m, cmd, err);
msg->len -= sizeof(struct w1_netlink_msg) + m->len;
m = (struct w1_netlink_msg *)(((u8 *)m) + sizeof(struct w1_netlink_msg) + m->len);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff