diff options
| author | David Fries <David@Fries.net> | 2014-01-15 22:29:17 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-07 15:40:17 -0800 |
| commit | 70b34d2ed807b722413894975a8c60617defb887 (patch) | |
| tree | 5dd0073cdfb48471130284bf3727223e3a100530 /drivers/w1/w1_netlink.h | |
| parent | 3c6955e5aa2a7ebf18a44486be6a7f047811650b (diff) | |
| download | lwn-70b34d2ed807b722413894975a8c60617defb887.tar.gz lwn-70b34d2ed807b722413894975a8c60617defb887.zip | |
w1: new netlink commands, add/remove/list slaves
Introduce new commands to add, remove, and list slave devices through
the netlink interface. This can be useful to skip the search on a
static network. They could previously only be added or removed
through automatic search or sysfs, and this allows a program to only
use netlink.
Only allocate memory when needed, so move kzalloc into w1_get_slaves
where it was used.
Signed-off-by: David Fries <David@Fries.net>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/w1/w1_netlink.h')
| -rw-r--r-- | drivers/w1/w1_netlink.h | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/drivers/w1/w1_netlink.h b/drivers/w1/w1_netlink.h index b0922dc29658..ea9f3e453621 100644 --- a/drivers/w1/w1_netlink.h +++ b/drivers/w1/w1_netlink.h @@ -27,6 +27,17 @@ #include "w1.h" +/** enum w1_netlink_message_types - message type + * + * @W1_SLAVE_ADD: notification that a slave device was added + * @W1_SLAVE_REMOVE: notification that a slave device was removed + * @W1_MASTER_ADD: notification that a new bus master was added + * @W1_MASTER_REMOVE: notification that a bus masterwas removed + * @W1_MASTER_CMD: initiate operations on a specific master + * @W1_SLAVE_CMD: sends reset, selects the slave, then does a read/write/touch + * operation + * @W1_LIST_MASTERS: used to determine the bus master identifiers + */ enum w1_netlink_message_types { W1_SLAVE_ADD = 0, W1_SLAVE_REMOVE, @@ -52,6 +63,21 @@ struct w1_netlink_msg __u8 data[0]; }; +/** enum w1_commands - commands available for master or slave operations + * @W1_CMD_READ: read len bytes + * @W1_CMD_WRITE: write len bytes + * @W1_CMD_SEARCH: initiate a standard search, returns only the slave + * devices found during that search + * @W1_CMD_ALARM_SEARCH: search for devices that are currently alarming + * @W1_CMD_TOUCH: Touches a series of bytes. + * @W1_CMD_RESET: sends a bus reset on the given master + * @W1_CMD_SLAVE_ADD: adds a slave to the given master, + * 8 byte slave id at data[0] + * @W1_CMD_SLAVE_REMOVE: removes a slave to the given master, + * 8 byte slave id at data[0] + * @W1_CMD_LIST_SLAVES: list of slaves registered on this master + * @W1_CMD_MAX: number of available commands + */ enum w1_commands { W1_CMD_READ = 0, W1_CMD_WRITE, @@ -59,7 +85,10 @@ enum w1_commands { W1_CMD_ALARM_SEARCH, W1_CMD_TOUCH, W1_CMD_RESET, - W1_CMD_MAX, + W1_CMD_SLAVE_ADD, + W1_CMD_SLAVE_REMOVE, + W1_CMD_LIST_SLAVES, + W1_CMD_MAX }; struct w1_netlink_cmd |