--- name: "struct_w1_master" section: "9" platform: "linux" package: "linux-manual-4.9" version: "4.9.228-1" release: "Debian 9 (Stretch)" platforms: ["linux"] url: "https://new.carta.tech/struct_w1_master" --- # struct\_w1\_master(9) one per bus master ## 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** \ Author. ## COPYRIGHT