mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-30 07:34:12 +08:00
CAPI: Reduce #ifdef mess around CONFIG_ISDN_CAPI_MIDDLEWARE
Make the code a bit more readable be providing stub functions for the !CONFIG_ISDN_CAPI_MIDDLEWARE case. Though a few lines are moved around, this comes with no functional changes. Signed-off-by: Jan Kiszka <jan.kiszka@web.de> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jan Kiszka
David S. Miller
parent
88c896ef87
commit
501c87a919
@ -23,14 +23,10 @@
|
||||
#include <linux/smp_lock.h>
|
||||
#include <linux/timer.h>
|
||||
#include <linux/wait.h>
|
||||
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
||||
#include <linux/tty.h>
|
||||
#ifdef CONFIG_PPP
|
||||
#include <linux/netdevice.h>
|
||||
#include <linux/ppp_defs.h>
|
||||
#include <linux/if_ppp.h>
|
||||
#endif /* CONFIG_PPP */
|
||||
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
#include <linux/skbuff.h>
|
||||
#include <linux/proc_fs.h>
|
||||
#include <linux/seq_file.h>
|
||||
@ -56,17 +52,17 @@ MODULE_LICENSE("GPL");
|
||||
/* -------- driver information -------------------------------------- */
|
||||
|
||||
static struct class *capi_class;
|
||||
|
||||
static int capi_major = 68; /* allocated */
|
||||
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
||||
#define CAPINC_NR_PORTS 32
|
||||
#define CAPINC_MAX_PORTS 256
|
||||
static int capi_ttymajor = 191;
|
||||
static int capi_ttyminors = CAPINC_NR_PORTS;
|
||||
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
|
||||
module_param_named(major, capi_major, uint, 0);
|
||||
|
||||
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
||||
#define CAPINC_NR_PORTS 32
|
||||
#define CAPINC_MAX_PORTS 256
|
||||
|
||||
static int capi_ttymajor = 191;
|
||||
static int capi_ttyminors = CAPINC_NR_PORTS;
|
||||
|
||||
module_param_named(ttymajor, capi_ttymajor, uint, 0);
|
||||
module_param_named(ttyminors, capi_ttyminors, uint, 0);
|
||||
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
@ -81,7 +77,6 @@ module_param_named(ttyminors, capi_ttyminors, uint, 0);
|
||||
|
||||
struct capidev;
|
||||
struct capincci;
|
||||
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
||||
struct capiminor;
|
||||
|
||||
struct datahandle_queue {
|
||||
@ -116,7 +111,6 @@ struct capiminor {
|
||||
int nack;
|
||||
spinlock_t ackqlock;
|
||||
};
|
||||
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
|
||||
/* FIXME: The following lock is a sledgehammer-workaround to a
|
||||
* locking issue with the capiminor (and maybe other) data structure(s).
|
||||
@ -156,14 +150,13 @@ static DEFINE_RWLOCK(capidev_list_lock);
|
||||
static LIST_HEAD(capidev_list);
|
||||
|
||||
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
||||
|
||||
static DEFINE_RWLOCK(capiminor_list_lock);
|
||||
static LIST_HEAD(capiminor_list);
|
||||
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
|
||||
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
||||
/* -------- datahandles --------------------------------------------- */
|
||||
|
||||
static int capincci_add_ack(struct capiminor *mp, u16 datahandle)
|
||||
static int capiminor_add_ack(struct capiminor *mp, u16 datahandle)
|
||||
{
|
||||
struct datahandle_queue *n;
|
||||
unsigned long flags;
|
||||
@ -301,26 +294,17 @@ static struct capiminor *capiminor_find(unsigned int minor)
|
||||
|
||||
return p;
|
||||
}
|
||||
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
|
||||
/* -------- struct capincci ----------------------------------------- */
|
||||
|
||||
static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
|
||||
static void capincci_alloc_minor(struct capidev *cdev, struct capincci *np)
|
||||
{
|
||||
struct capincci *np, **pp;
|
||||
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
||||
struct capiminor *mp = NULL;
|
||||
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
struct capiminor *mp;
|
||||
|
||||
np = kzalloc(sizeof(*np), GFP_ATOMIC);
|
||||
if (!np)
|
||||
return NULL;
|
||||
np->ncci = ncci;
|
||||
np->cdev = cdev;
|
||||
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
||||
mp = NULL;
|
||||
if (cdev->userflags & CAPIFLAG_HIGHJACKING)
|
||||
mp = np->minorp = capiminor_alloc(&cdev->ap, ncci);
|
||||
if (!(cdev->userflags & CAPIFLAG_HIGHJACKING))
|
||||
return;
|
||||
|
||||
mp = np->minorp = capiminor_alloc(&cdev->ap, np->ncci);
|
||||
if (mp) {
|
||||
mp->nccip = np;
|
||||
#ifdef _DEBUG_REFCOUNT
|
||||
@ -330,7 +314,58 @@ static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
|
||||
capifs_new_ncci(mp->minor,
|
||||
MKDEV(capi_ttymajor, mp->minor));
|
||||
}
|
||||
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
}
|
||||
|
||||
static void capincci_free_minor(struct capincci *np)
|
||||
{
|
||||
struct capiminor *mp = np->minorp;
|
||||
|
||||
if (mp) {
|
||||
capifs_free_ncci(mp->capifs_dentry);
|
||||
if (mp->tty) {
|
||||
mp->nccip = NULL;
|
||||
#ifdef _DEBUG_REFCOUNT
|
||||
printk(KERN_DEBUG "reset mp->nccip\n");
|
||||
#endif
|
||||
tty_hangup(mp->tty);
|
||||
} else {
|
||||
capiminor_free(mp);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static inline unsigned int capincci_minor_opencount(struct capincci *np)
|
||||
{
|
||||
struct capiminor *mp = np->minorp;
|
||||
|
||||
return mp ? atomic_read(&mp->ttyopencount) : 0;
|
||||
}
|
||||
|
||||
#else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
|
||||
static inline void
|
||||
capincci_alloc_minor(struct capidev *cdev, struct capincci *np) { }
|
||||
static inline void capincci_free_minor(struct capincci *np) { }
|
||||
|
||||
static inline unsigned int capincci_minor_opencount(struct capincci *np)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
|
||||
static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
|
||||
{
|
||||
struct capincci *np, **pp;
|
||||
|
||||
np = kzalloc(sizeof(*np), GFP_ATOMIC);
|
||||
if (!np)
|
||||
return NULL;
|
||||
np->ncci = ncci;
|
||||
np->cdev = cdev;
|
||||
|
||||
capincci_alloc_minor(cdev, np);
|
||||
|
||||
for (pp=&cdev->nccis; *pp; pp = &(*pp)->next)
|
||||
;
|
||||
*pp = np;
|
||||
@ -340,29 +375,13 @@ static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
|
||||
static void capincci_free(struct capidev *cdev, u32 ncci)
|
||||
{
|
||||
struct capincci *np, **pp;
|
||||
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
||||
struct capiminor *mp;
|
||||
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
|
||||
pp=&cdev->nccis;
|
||||
while (*pp) {
|
||||
np = *pp;
|
||||
if (ncci == 0xffffffff || np->ncci == ncci) {
|
||||
*pp = (*pp)->next;
|
||||
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
||||
if ((mp = np->minorp) != NULL) {
|
||||
capifs_free_ncci(mp->capifs_dentry);
|
||||
if (mp->tty) {
|
||||
mp->nccip = NULL;
|
||||
#ifdef _DEBUG_REFCOUNT
|
||||
printk(KERN_DEBUG "reset mp->nccip\n");
|
||||
#endif
|
||||
tty_hangup(mp->tty);
|
||||
} else {
|
||||
capiminor_free(mp);
|
||||
}
|
||||
}
|
||||
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
capincci_free_minor(np);
|
||||
kfree(np);
|
||||
if (*pp == NULL) return;
|
||||
} else {
|
||||
@ -552,7 +571,7 @@ static int handle_minor_send(struct capiminor *mp)
|
||||
capimsg_setu16(skb->data, 18, datahandle);
|
||||
capimsg_setu16(skb->data, 20, 0); /* Flags */
|
||||
|
||||
if (capincci_add_ack(mp, datahandle) < 0) {
|
||||
if (capiminor_add_ack(mp, datahandle) < 0) {
|
||||
skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
|
||||
skb_queue_head(&mp->outqueue, skb);
|
||||
return count;
|
||||
@ -628,10 +647,13 @@ static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
|
||||
spin_unlock_irqrestore(&workaround_lock, flags);
|
||||
return;
|
||||
}
|
||||
|
||||
#ifndef CONFIG_ISDN_CAPI_MIDDLEWARE
|
||||
skb_queue_tail(&cdev->recvqueue, skb);
|
||||
wake_up_interruptible(&cdev->recvwait);
|
||||
|
||||
#else /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
|
||||
mp = np->minorp;
|
||||
if (!mp) {
|
||||
skb_queue_tail(&cdev->recvqueue, skb);
|
||||
@ -639,10 +661,7 @@ static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
|
||||
spin_unlock_irqrestore(&workaround_lock, flags);
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) {
|
||||
|
||||
datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2);
|
||||
#ifdef _DEBUG_DATAFLOW
|
||||
printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n",
|
||||
@ -672,6 +691,7 @@ static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
|
||||
wake_up_interruptible(&cdev->recvwait);
|
||||
}
|
||||
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
|
||||
spin_unlock_irqrestore(&workaround_lock, flags);
|
||||
}
|
||||
|
||||
@ -929,9 +949,6 @@ capi_ioctl(struct inode *inode, struct file *file,
|
||||
case CAPI_NCCI_OPENCOUNT:
|
||||
{
|
||||
struct capincci *nccip;
|
||||
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
||||
struct capiminor *mp;
|
||||
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
unsigned ncci;
|
||||
int count = 0;
|
||||
if (copy_from_user(&ncci, argp, sizeof(ncci)))
|
||||
@ -942,11 +959,7 @@ capi_ioctl(struct inode *inode, struct file *file,
|
||||
mutex_unlock(&cdev->ncci_list_mtx);
|
||||
return 0;
|
||||
}
|
||||
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
||||
if ((mp = nccip->minorp) != NULL) {
|
||||
count += atomic_read(&mp->ttyopencount);
|
||||
}
|
||||
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
count += capincci_minor_opencount(nccip);
|
||||
mutex_unlock(&cdev->ncci_list_mtx);
|
||||
return count;
|
||||
}
|
||||
@ -1396,7 +1409,16 @@ static void capinc_tty_exit(void)
|
||||
put_tty_driver(drv);
|
||||
}
|
||||
|
||||
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
#else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
|
||||
static inline int capinc_tty_init(void)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void capinc_tty_exit(void) { }
|
||||
|
||||
#endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
|
||||
/* -------- /proc functions ----------------------------------------- */
|
||||
|
||||
@ -1505,23 +1527,19 @@ static int __init capi_init(void)
|
||||
|
||||
device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
|
||||
|
||||
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
||||
if (capinc_tty_init() < 0) {
|
||||
device_destroy(capi_class, MKDEV(capi_major, 0));
|
||||
class_destroy(capi_class);
|
||||
unregister_chrdev(capi_major, "capi20");
|
||||
return -ENOMEM;
|
||||
}
|
||||
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
|
||||
|
||||
proc_init();
|
||||
|
||||
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
||||
#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
|
||||
compileinfo = " (middleware+capifs)";
|
||||
#else
|
||||
#elif defined(CONFIG_ISDN_CAPI_MIDDLEWARE)
|
||||
compileinfo = " (no capifs)";
|
||||
#endif
|
||||
#else
|
||||
compileinfo = " (no middleware)";
|
||||
#endif
|
||||
@ -1539,9 +1557,7 @@ static void __exit capi_exit(void)
|
||||
class_destroy(capi_class);
|
||||
unregister_chrdev(capi_major, "capi20");
|
||||
|
||||
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
|
||||
capinc_tty_exit();
|
||||
#endif
|
||||
}
|
||||
|
||||
module_init(capi_init);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user