STRUCT W1_MASTER(9)               W1 API internal to the kernel               STRUCT W1_MASTER(9)



NAME
       struct_w1_master - one per bus master

SYNOPSIS
       struct w1_master {
         struct list_head w1_master_entry;
         struct module * owner;
         unsigned char name[W1_MAXNAMELEN];
         struct mutex list_mutex;
         struct list_head slist;
         struct list_head async_list;
         int max_slave_count;
         int slave_count;
         unsigned long attempts;
         int slave_ttl;
         int initialized;
         u32 id;
         int search_count;
         u64 search_id;
         atomic_t refcnt;
         void * priv;
         int enable_pullup;
         int pullup_duration;
         long flags;
         struct task_struct * thread;
         struct mutex mutex;
         struct mutex bus_mutex;
         struct device_driver * driver;
         struct device dev;
         struct w1_bus_master * bus_master;
         u32 seq;
       };

MEMBERS
       w1_master_entry
           master linked list

       owner
           module owner

       name[W1_MAXNAMELEN]
           dynamically allocate bus name

       list_mutex
           protect slist and async_list

       slist
           linked list of slaves

       async_list
           linked list of netlink commands to execute

       max_slave_count
           maximum number of slaves to search for at a time

       slave_count
           current number of slaves known

       attempts
           number of searches ran

       slave_ttl
           number of searches before a slave is timed out

       initialized
           prevent init/removal race conditions

       id
           w1 bus number

       search_count
           number of automatic searches to run, -1 unlimited

       search_id
           allows continuing a search

       refcnt
           reference count

       priv
           private data storage

       enable_pullup
           allows a strong pullup

       pullup_duration
           time for the next strong pullup

       flags
           one of w1_master_flags

       thread
           thread for bus search and netlink commands

       mutex
           protect most of w1_master

       bus_mutex
           pretect concurrent bus access

       driver
           sysfs driver

       dev
           sysfs device

       bus_master
           io operations available

       seq
           sequence number used for netlink broadcasts

AUTHOR
       David Fries <David AT Fries.net>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                       STRUCT W1_MASTER(9)