diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/atmdev.h | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/include/linux/atmdev.h b/include/linux/atmdev.h index ac9b93e25dd1..33a81bdd1fb8 100644 --- a/include/linux/atmdev.h +++ b/include/linux/atmdev.h @@ -331,6 +331,8 @@ struct atm_dev { struct k_atm_dev_stats stats; /* statistics */ char signal; /* signal status (ATM_PHY_SIG_*) */ int link_rate; /* link rate (default: OC3) */ + atomic_t refcnt; /* reference count */ + spinlock_t lock; /* protect internal members */ #ifdef CONFIG_PROC_FS struct proc_dir_entry *proc_entry; /* proc entry */ char *proc_name; /* proc entry name */ @@ -392,7 +394,7 @@ struct atm_skb_data { struct atm_dev *atm_dev_register(const char *type,const struct atmdev_ops *ops, int number,unsigned long *flags); /* number == -1: pick first available */ -struct atm_dev *atm_find_dev(int number); +struct atm_dev *atm_dev_lookup(int number); void atm_dev_deregister(struct atm_dev *dev); void shutdown_atm_dev(struct atm_dev *dev); void bind_vcc(struct atm_vcc *vcc,struct atm_dev *dev); @@ -403,30 +405,46 @@ void bind_vcc(struct atm_vcc *vcc,struct atm_dev *dev); * */ -static __inline__ int atm_guess_pdu2truesize(int pdu_size) +static inline int atm_guess_pdu2truesize(int pdu_size) { return ((pdu_size+15) & ~15) + sizeof(struct sk_buff); } -static __inline__ void atm_force_charge(struct atm_vcc *vcc,int truesize) +static inline void atm_force_charge(struct atm_vcc *vcc,int truesize) { atomic_add(truesize, &vcc->sk->rmem_alloc); } -static __inline__ void atm_return(struct atm_vcc *vcc,int truesize) +static inline void atm_return(struct atm_vcc *vcc,int truesize) { atomic_sub(truesize, &vcc->sk->rmem_alloc); } -static __inline__ int atm_may_send(struct atm_vcc *vcc,unsigned int size) +static inline int atm_may_send(struct atm_vcc *vcc,unsigned int size) { return (size + atomic_read(&vcc->sk->wmem_alloc)) < vcc->sk->sndbuf; } +static inline void atm_dev_hold(struct atm_dev *dev) +{ + atomic_inc(&dev->refcnt); +} + + +static inline void atm_dev_release(struct atm_dev *dev) +{ + atomic_dec(&dev->refcnt); + + if ((atomic_read(&dev->refcnt) == 1) && + test_bit(ATM_DF_CLOSE,&dev->flags)) + shutdown_atm_dev(dev); +} + + int atm_charge(struct atm_vcc *vcc,int truesize); struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size, int gfp_flags); |