X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=net%2Fax25%2Fax25_iface.c;h=aff3e652c2d110ad55448ae2e41dd15fcac5affc;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=d68aff100729abbfa51f2677ae565f6a156ad08d;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git diff --git a/net/ax25/ax25_iface.c b/net/ax25/ax25_iface.c index d68aff100..aff3e652c 100644 --- a/net/ax25/ax25_iface.c +++ b/net/ax25/ax25_iface.c @@ -6,12 +6,12 @@ * * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) */ -#include #include #include #include #include #include +#include #include #include #include @@ -29,17 +29,10 @@ #include #include -static struct protocol_struct { - struct protocol_struct *next; - unsigned int pid; - int (*func)(struct sk_buff *, ax25_cb *); -} *protocol_list = NULL; +static struct ax25_protocol *protocol_list; static DEFINE_RWLOCK(protocol_list_lock); -static struct linkfail_struct { - struct linkfail_struct *next; - void (*func)(ax25_cb *, int); -} *linkfail_list = NULL; +static HLIST_HEAD(ax25_linkfail_list); static DEFINE_SPINLOCK(linkfail_lock); static struct listen_struct { @@ -49,45 +42,34 @@ static struct listen_struct { } *listen_list = NULL; static DEFINE_SPINLOCK(listen_lock); -int ax25_protocol_register(unsigned int pid, - int (*func)(struct sk_buff *, ax25_cb *)) +/* + * Do not register the internal protocols AX25_P_TEXT, AX25_P_SEGMENT, + * AX25_P_IP or AX25_P_ARP ... + */ +void ax25_register_pid(struct ax25_protocol *ap) { - struct protocol_struct *protocol; - - if (pid == AX25_P_TEXT || pid == AX25_P_SEGMENT) - return 0; -#ifdef CONFIG_INET - if (pid == AX25_P_IP || pid == AX25_P_ARP) - return 0; -#endif - if ((protocol = kmalloc(sizeof(*protocol), GFP_ATOMIC)) == NULL) - return 0; - - protocol->pid = pid; - protocol->func = func; - - write_lock(&protocol_list_lock); - protocol->next = protocol_list; - protocol_list = protocol; - write_unlock(&protocol_list_lock); - - return 1; + write_lock_bh(&protocol_list_lock); + ap->next = protocol_list; + protocol_list = ap; + write_unlock_bh(&protocol_list_lock); } +EXPORT_SYMBOL_GPL(ax25_register_pid); + void ax25_protocol_release(unsigned int pid) { - struct protocol_struct *s, *protocol; + struct ax25_protocol *s, *protocol; - write_lock(&protocol_list_lock); + write_lock_bh(&protocol_list_lock); protocol = protocol_list; if (protocol == NULL) { - write_unlock(&protocol_list_lock); + write_unlock_bh(&protocol_list_lock); return; } if (protocol->pid == pid) { protocol_list = protocol->next; - write_unlock(&protocol_list_lock); + write_unlock_bh(&protocol_list_lock); kfree(protocol); return; } @@ -96,65 +78,36 @@ void ax25_protocol_release(unsigned int pid) if (protocol->next->pid == pid) { s = protocol->next; protocol->next = protocol->next->next; - write_unlock(&protocol_list_lock); + write_unlock_bh(&protocol_list_lock); kfree(s); return; } protocol = protocol->next; } - write_unlock(&protocol_list_lock); + write_unlock_bh(&protocol_list_lock); } -int ax25_linkfail_register(void (*func)(ax25_cb *, int)) -{ - struct linkfail_struct *linkfail; - - if ((linkfail = kmalloc(sizeof(*linkfail), GFP_ATOMIC)) == NULL) - return 0; - - linkfail->func = func; +EXPORT_SYMBOL(ax25_protocol_release); +void ax25_linkfail_register(struct ax25_linkfail *lf) +{ spin_lock_bh(&linkfail_lock); - linkfail->next = linkfail_list; - linkfail_list = linkfail; + hlist_add_head(&lf->lf_node, &ax25_linkfail_list); spin_unlock_bh(&linkfail_lock); - - return 1; } -void ax25_linkfail_release(void (*func)(ax25_cb *, int)) -{ - struct linkfail_struct *s, *linkfail; +EXPORT_SYMBOL(ax25_linkfail_register); +void ax25_linkfail_release(struct ax25_linkfail *lf) +{ spin_lock_bh(&linkfail_lock); - linkfail = linkfail_list; - if (linkfail == NULL) { - spin_unlock_bh(&linkfail_lock); - return; - } - - if (linkfail->func == func) { - linkfail_list = linkfail->next; - spin_unlock_bh(&linkfail_lock); - kfree(linkfail); - return; - } - - while (linkfail != NULL && linkfail->next != NULL) { - if (linkfail->next->func == func) { - s = linkfail->next; - linkfail->next = linkfail->next->next; - spin_unlock_bh(&linkfail_lock); - kfree(s); - return; - } - - linkfail = linkfail->next; - } + hlist_del_init(&lf->lf_node); spin_unlock_bh(&linkfail_lock); } +EXPORT_SYMBOL(ax25_linkfail_release); + int ax25_listen_register(ax25_address *callsign, struct net_device *dev) { struct listen_struct *listen; @@ -163,7 +116,7 @@ int ax25_listen_register(ax25_address *callsign, struct net_device *dev) return 0; if ((listen = kmalloc(sizeof(*listen), GFP_ATOMIC)) == NULL) - return 0; + return -ENOMEM; listen->callsign = *callsign; listen->dev = dev; @@ -173,9 +126,11 @@ int ax25_listen_register(ax25_address *callsign, struct net_device *dev) listen_list = listen; spin_unlock_bh(&listen_lock); - return 1; + return 0; } +EXPORT_SYMBOL(ax25_listen_register); + void ax25_listen_release(ax25_address *callsign, struct net_device *dev) { struct listen_struct *s, *listen; @@ -208,10 +163,12 @@ void ax25_listen_release(ax25_address *callsign, struct net_device *dev) spin_unlock_bh(&listen_lock); } +EXPORT_SYMBOL(ax25_listen_release); + int (*ax25_protocol_function(unsigned int pid))(struct sk_buff *, ax25_cb *) { int (*res)(struct sk_buff *, ax25_cb *) = NULL; - struct protocol_struct *protocol; + struct ax25_protocol *protocol; read_lock(&protocol_list_lock); for (protocol = protocol_list; protocol != NULL; protocol = protocol->next) @@ -230,7 +187,8 @@ int ax25_listen_mine(ax25_address *callsign, struct net_device *dev) spin_lock_bh(&listen_lock); for (listen = listen_list; listen != NULL; listen = listen->next) - if (ax25cmp(&listen->callsign, callsign) == 0 && (listen->dev == dev || listen->dev == NULL)) { + if (ax25cmp(&listen->callsign, callsign) == 0 && + (listen->dev == dev || listen->dev == NULL)) { spin_unlock_bh(&listen_lock); return 1; } @@ -241,26 +199,27 @@ int ax25_listen_mine(ax25_address *callsign, struct net_device *dev) void ax25_link_failed(ax25_cb *ax25, int reason) { - struct linkfail_struct *linkfail; + struct ax25_linkfail *lf; + struct hlist_node *node; spin_lock_bh(&linkfail_lock); - for (linkfail = linkfail_list; linkfail != NULL; linkfail = linkfail->next) - (linkfail->func)(ax25, reason); + hlist_for_each_entry(lf, node, &ax25_linkfail_list, lf_node) + lf->func(ax25, reason); spin_unlock_bh(&linkfail_lock); } int ax25_protocol_is_registered(unsigned int pid) { - struct protocol_struct *protocol; + struct ax25_protocol *protocol; int res = 0; - read_lock(&protocol_list_lock); + read_lock_bh(&protocol_list_lock); for (protocol = protocol_list; protocol != NULL; protocol = protocol->next) if (protocol->pid == pid) { res = 1; break; } - read_unlock(&protocol_list_lock); + read_unlock_bh(&protocol_list_lock); return res; }