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https://github.com/Fishwaldo/Star64_linux.git
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Merge branch 'net-hdlc_fr-clean-up-some-code-style-issues'
Peng Li says: ==================== net: hdlc_fr: clean up some code style issues V1 -> V2: 1, Use appropriate commit prefix suggested by Jakub Kicinski, replace commit prefix "net: wan" by "net: hdlc_fr". ==================== Link: https://lore.kernel.org/r/1622160769-6678-1-git-send-email-huangguangbin2@huawei.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski
commit
38e9673ce0
1 changed files with 34 additions and 67 deletions
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@ -6,16 +6,16 @@
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* Copyright (C) 1999 - 2006 Krzysztof Halasa <khc@pm.waw.pl>
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*
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Theory of PVC state
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Theory of PVC state
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DCE mode:
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(exist,new) -> 0,0 when "PVC create" or if "link unreliable"
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0,x -> 1,1 if "link reliable" when sending FULL STATUS
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1,1 -> 1,0 if received FULL STATUS ACK
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0,x -> 1,1 if "link reliable" when sending FULL STATUS
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1,1 -> 1,0 if received FULL STATUS ACK
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(active) -> 0 when "ifconfig PVC down" or "link unreliable" or "PVC create"
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-> 1 when "PVC up" and (exist,new) = 1,0
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-> 1 when "PVC up" and (exist,new) = 1,0
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DTE mode:
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(exist,new,active) = FULL STATUS if "link reliable"
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@ -60,7 +60,6 @@
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#define NLPID_CCITT_ANSI_LMI 0x08
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#define NLPID_CISCO_LMI 0x09
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#define LMI_CCITT_ANSI_DLCI 0 /* LMI DLCI */
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#define LMI_CISCO_DLCI 1023
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@ -86,7 +85,6 @@
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#define LMI_CCITT_CISCO_LENGTH 13 /* LMI frame lengths */
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#define LMI_ANSI_LENGTH 14
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struct fr_hdr {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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unsigned ea1: 1;
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@ -111,7 +109,6 @@ struct fr_hdr {
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#endif
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} __packed;
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struct pvc_device {
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struct net_device *frad;
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struct net_device *main;
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@ -128,7 +125,7 @@ struct pvc_device {
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unsigned int fecn: 1;
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unsigned int becn: 1;
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unsigned int bandwidth; /* Cisco LMI reporting only */
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}state;
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} state;
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};
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struct frad_state {
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@ -149,29 +146,24 @@ struct frad_state {
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u8 rxseq; /* RX sequence number */
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};
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static int fr_ioctl(struct net_device *dev, struct ifreq *ifr);
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static inline u16 q922_to_dlci(u8 *hdr)
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{
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return ((hdr[0] & 0xFC) << 2) | ((hdr[1] & 0xF0) >> 4);
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}
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static inline void dlci_to_q922(u8 *hdr, u16 dlci)
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{
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hdr[0] = (dlci >> 2) & 0xFC;
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hdr[1] = ((dlci << 4) & 0xF0) | 0x01;
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}
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static inline struct frad_state* state(hdlc_device *hdlc)
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static inline struct frad_state *state(hdlc_device *hdlc)
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{
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return(struct frad_state *)(hdlc->state);
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return (struct frad_state *)(hdlc->state);
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}
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static inline struct pvc_device *find_pvc(hdlc_device *hdlc, u16 dlci)
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{
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struct pvc_device *pvc = state(hdlc)->first_pvc;
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@ -187,7 +179,6 @@ static inline struct pvc_device *find_pvc(hdlc_device *hdlc, u16 dlci)
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return NULL;
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}
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static struct pvc_device *add_pvc(struct net_device *dev, u16 dlci)
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{
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hdlc_device *hdlc = dev_to_hdlc(dev);
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@ -215,13 +206,11 @@ static struct pvc_device *add_pvc(struct net_device *dev, u16 dlci)
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return pvc;
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}
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static inline int pvc_is_used(struct pvc_device *pvc)
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{
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return pvc->main || pvc->ether;
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}
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static inline void pvc_carrier(int on, struct pvc_device *pvc)
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{
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if (on) {
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@ -241,7 +230,6 @@ static inline void pvc_carrier(int on, struct pvc_device *pvc)
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}
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}
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static inline void delete_unused_pvcs(hdlc_device *hdlc)
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{
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struct pvc_device **pvc_p = &state(hdlc)->first_pvc;
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@ -260,7 +248,6 @@ static inline void delete_unused_pvcs(hdlc_device *hdlc)
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}
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}
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static inline struct net_device **get_dev_p(struct pvc_device *pvc,
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int type)
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{
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@ -270,7 +257,6 @@ static inline struct net_device **get_dev_p(struct pvc_device *pvc,
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return &pvc->main;
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}
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static int fr_hard_header(struct sk_buff *skb, u16 dlci)
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{
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if (!skb->dev) { /* Control packets */
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@ -334,8 +320,6 @@ static int fr_hard_header(struct sk_buff *skb, u16 dlci)
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return 0;
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}
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static int pvc_open(struct net_device *dev)
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{
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struct pvc_device *pvc = dev->ml_priv;
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@ -345,6 +329,7 @@ static int pvc_open(struct net_device *dev)
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if (pvc->open_count++ == 0) {
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hdlc_device *hdlc = dev_to_hdlc(pvc->frad);
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if (state(hdlc)->settings.lmi == LMI_NONE)
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pvc->state.active = netif_carrier_ok(pvc->frad);
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@ -354,14 +339,13 @@ static int pvc_open(struct net_device *dev)
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return 0;
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}
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static int pvc_close(struct net_device *dev)
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{
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struct pvc_device *pvc = dev->ml_priv;
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if (--pvc->open_count == 0) {
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hdlc_device *hdlc = dev_to_hdlc(pvc->frad);
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if (state(hdlc)->settings.lmi == LMI_NONE)
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pvc->state.active = 0;
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@ -373,8 +357,6 @@ static int pvc_close(struct net_device *dev)
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return 0;
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}
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static int pvc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
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{
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struct pvc_device *pvc = dev->ml_priv;
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@ -465,15 +447,12 @@ static inline void fr_log_dlci_active(struct pvc_device *pvc)
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pvc->state.active ? "active" : "inactive");
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}
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static inline u8 fr_lmi_nextseq(u8 x)
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{
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x++;
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return x ? x : 1;
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}
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static void fr_lmi_send(struct net_device *dev, int fullrep)
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{
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hdlc_device *hdlc = dev_to_hdlc(dev);
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@ -495,17 +474,16 @@ static void fr_lmi_send(struct net_device *dev, int fullrep)
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}
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skb = dev_alloc_skb(len);
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if (!skb) {
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netdev_warn(dev, "Memory squeeze on fr_lmi_send()\n");
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if (!skb)
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return;
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}
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memset(skb->data, 0, len);
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skb_reserve(skb, 4);
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if (lmi == LMI_CISCO) {
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if (lmi == LMI_CISCO)
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fr_hard_header(skb, LMI_CISCO_DLCI);
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} else {
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else
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fr_hard_header(skb, LMI_CCITT_ANSI_DLCI);
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}
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data = skb_tail_pointer(skb);
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data[i++] = LMI_CALLREF;
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data[i++] = dce ? LMI_STATUS : LMI_STATUS_ENQUIRY;
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@ -569,8 +547,6 @@ static void fr_lmi_send(struct net_device *dev, int fullrep)
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dev_queue_xmit(skb);
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}
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static void fr_set_link_state(int reliable, struct net_device *dev)
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{
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hdlc_device *hdlc = dev_to_hdlc(dev);
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@ -603,7 +579,6 @@ static void fr_set_link_state(int reliable, struct net_device *dev)
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}
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}
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static void fr_timer(struct timer_list *t)
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{
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struct frad_state *st = from_timer(st, t, timer);
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@ -637,10 +612,10 @@ static void fr_timer(struct timer_list *t)
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fr_set_link_state(reliable, dev);
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}
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if (state(hdlc)->settings.dce)
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if (state(hdlc)->settings.dce) {
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state(hdlc)->timer.expires = jiffies +
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state(hdlc)->settings.t392 * HZ;
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else {
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} else {
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if (state(hdlc)->n391cnt)
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state(hdlc)->n391cnt--;
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@ -655,7 +630,6 @@ static void fr_timer(struct timer_list *t)
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add_timer(&state(hdlc)->timer);
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}
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static int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb)
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{
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hdlc_device *hdlc = dev_to_hdlc(dev);
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@ -696,8 +670,9 @@ static int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb)
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return 1;
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}
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i = 7;
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} else
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} else {
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i = 6;
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}
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if (skb->data[i] != (lmi == LMI_CCITT ? LMI_CCITT_REPTYPE :
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LMI_ANSI_CISCO_REPTYPE)) {
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@ -814,8 +789,8 @@ static int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb)
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}
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i++;
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new = !! (skb->data[i + 2] & 0x08);
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active = !! (skb->data[i + 2] & 0x02);
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new = !!(skb->data[i + 2] & 0x08);
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active = !!(skb->data[i + 2] & 0x02);
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if (lmi == LMI_CISCO) {
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dlci = (skb->data[i] << 8) | skb->data[i + 1];
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bw = (skb->data[i + 3] << 16) |
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@ -962,8 +937,8 @@ static int fr_rx(struct sk_buff *skb)
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pvc->state.becn ^= 1;
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}
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if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) {
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skb = skb_share_check(skb, GFP_ATOMIC);
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if (!skb) {
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frad->stats.rx_dropped++;
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return NET_RX_DROP;
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}
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@ -1018,8 +993,6 @@ rx_drop:
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return NET_RX_DROP;
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}
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static void fr_start(struct net_device *dev)
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{
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hdlc_device *hdlc = dev_to_hdlc(dev);
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@ -1040,11 +1013,11 @@ static void fr_start(struct net_device *dev)
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/* First poll after 1 s */
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state(hdlc)->timer.expires = jiffies + HZ;
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add_timer(&state(hdlc)->timer);
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} else
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} else {
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fr_set_link_state(1, dev);
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}
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}
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static void fr_stop(struct net_device *dev)
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{
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hdlc_device *hdlc = dev_to_hdlc(dev);
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@ -1056,7 +1029,6 @@ static void fr_stop(struct net_device *dev)
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fr_set_link_state(0, dev);
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}
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static void fr_close(struct net_device *dev)
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{
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hdlc_device *hdlc = dev_to_hdlc(dev);
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@ -1071,7 +1043,6 @@ static void fr_close(struct net_device *dev)
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}
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}
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static void pvc_setup(struct net_device *dev)
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{
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dev->type = ARPHRD_DLCI;
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@ -1095,7 +1066,8 @@ static int fr_add_pvc(struct net_device *frad, unsigned int dlci, int type)
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struct net_device *dev;
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int used;
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if ((pvc = add_pvc(frad, dlci)) == NULL) {
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pvc = add_pvc(frad, dlci);
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if (!pvc) {
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netdev_warn(frad, "Memory squeeze on fr_add_pvc()\n");
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return -ENOBUFS;
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}
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@ -1121,7 +1093,7 @@ static int fr_add_pvc(struct net_device *frad, unsigned int dlci, int type)
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dev->priv_flags &= ~IFF_TX_SKB_SHARING;
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eth_hw_addr_random(dev);
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} else {
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*(__be16*)dev->dev_addr = htons(dlci);
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*(__be16 *)dev->dev_addr = htons(dlci);
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dlci_to_q922(dev->broadcast, dlci);
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}
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dev->netdev_ops = &pvc_ops;
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@ -1147,17 +1119,17 @@ static int fr_add_pvc(struct net_device *frad, unsigned int dlci, int type)
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return 0;
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}
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static int fr_del_pvc(hdlc_device *hdlc, unsigned int dlci, int type)
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{
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struct pvc_device *pvc;
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struct net_device *dev;
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if ((pvc = find_pvc(hdlc, dlci)) == NULL)
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pvc = find_pvc(hdlc, dlci);
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if (!pvc)
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return -ENOENT;
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if ((dev = *get_dev_p(pvc, type)) == NULL)
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dev = *get_dev_p(pvc, type);
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if (!dev)
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return -ENOENT;
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if (dev->flags & IFF_UP)
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@ -1174,12 +1146,11 @@ static int fr_del_pvc(hdlc_device *hdlc, unsigned int dlci, int type)
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return 0;
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}
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static void fr_destroy(struct net_device *frad)
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{
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hdlc_device *hdlc = dev_to_hdlc(frad);
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struct pvc_device *pvc = state(hdlc)->first_pvc;
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state(hdlc)->first_pvc = NULL; /* All PVCs destroyed */
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state(hdlc)->dce_pvc_count = 0;
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state(hdlc)->dce_changed = 1;
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@ -1198,7 +1169,6 @@ static void fr_destroy(struct net_device *frad)
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}
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}
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static struct hdlc_proto proto = {
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.close = fr_close,
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.start = fr_start,
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@ -1209,7 +1179,6 @@ static struct hdlc_proto proto = {
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.module = THIS_MODULE,
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};
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static int fr_ioctl(struct net_device *dev, struct ifreq *ifr)
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{
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fr_proto __user *fr_s = ifr->ifr_settings.ifs_ifsu.fr;
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@ -1259,7 +1228,8 @@ static int fr_ioctl(struct net_device *dev, struct ifreq *ifr)
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new_settings.dce != 1))
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return -EINVAL;
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result=hdlc->attach(dev, ENCODING_NRZ,PARITY_CRC16_PR1_CCITT);
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result = hdlc->attach(dev, ENCODING_NRZ,
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PARITY_CRC16_PR1_CCITT);
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if (result)
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return result;
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@ -1309,20 +1279,17 @@ static int fr_ioctl(struct net_device *dev, struct ifreq *ifr)
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return -EINVAL;
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}
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static int __init mod_init(void)
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{
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register_hdlc_protocol(&proto);
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return 0;
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}
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static void __exit mod_exit(void)
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{
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unregister_hdlc_protocol(&proto);
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}
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module_init(mod_init);
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module_exit(mod_exit);
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