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Add if_addr_mtx to struct ifnet, a mutex to protect ifnet-related address

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lists.  Add accessor macros.

This changes the size of struct ifnet, but ideally, all ifnet consumers
are now using if_alloc() to allocate these structures rather than
embedding them into device driver softc's, so this won't modify the
network device driver ABI.

MFC after:	1 week
This commit is contained in:
Robert Watson 2005-08-02 17:43:35 +00:00
parent c20990577c
commit de6073aab0
1 changed files with 11 additions and 0 deletions
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11
sys/net/if_var.h
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@ -179,6 +179,7 @@ struct ifnet {
struct mtx if_afdata_mtx; struct mtx if_afdata_mtx;
struct task if_starttask; /* task for IFF_NEEDSGIANT */ struct task if_starttask; /* task for IFF_NEEDSGIANT */
struct task if_linktask; /* task for link change events */ struct task if_linktask; /* task for link change events */
struct mtx if_addr_mtx; /* mutex to protect address lists */
}; };
typedef void if_init_f_t(void *); typedef void if_init_f_t(void *);
@ -216,6 +217,16 @@ typedef void if_init_f_t(void *);
#define if_addrlist if_addrhead #define if_addrlist if_addrhead
#define if_list if_link #define if_list if_link
/*
* Locks for address lists on the network interface.
*/
#define IF_ADDR_LOCK_INIT(if) mtx_init(&(if)->if_addr_mtx, \
"if_addr_mtx", NULL, MTX_DEF)
#define IF_ADDR_LOCK_DESTROY(if) mtx_destroy(&(if)->if_addr_mtx)
#define IF_ADDR_LOCK(if) mtx_lock(&(if)->if_addr_mtx)
#define IF_ADDR_UNLOCK(if) mtx_unlock(&(if)->if_addr_mtx)
#define IF_ADDR_LOCK_ASSERT(if) mtx_assert(&(if)->if_addr_mtx, MA_OWNED)
/* /*
* Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq) * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq)
* are queues of messages stored on ifqueue structures * are queues of messages stored on ifqueue structures