#include <linux/fcntl.h>
#include <linux/fs.h>
#include <linux/signal.h>
+#include <linux/mutex.h>
#include <linux/mm.h>
#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>
#include <linux/poll.h>
#include <linux/capi.h>
#include <linux/kernelcapi.h>
#include <linux/moduleparam.h>
#include <linux/isdn/capiutil.h>
#include <linux/isdn/capicmd.h>
-#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
-#include "capifs.h"
-#endif
-static char *revision = "$Revision: 1.1.2.7 $";
+#include "capifs.h"
MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface");
MODULE_AUTHOR("Carsten Paeth");
MODULE_LICENSE("GPL");
-#undef _DEBUG_REFCOUNT /* alloc/free and open/close debug */
#undef _DEBUG_TTYFUNCS /* call to tty_driver */
#undef _DEBUG_DATAFLOW /* data flow */
/* -------- driver information -------------------------------------- */
static struct class *capi_class;
-
static int capi_major = 68; /* allocated */
+
+module_param_named(major, capi_major, uint, 0);
+
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
-#define CAPINC_NR_PORTS 32
+#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
-module_param_named(ttymajor, capi_ttymajor, uint, 0);
module_param_named(ttyminors, capi_ttyminors, uint, 0);
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
struct capidev;
struct capincci;
-#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
struct capiminor;
struct datahandle_queue {
};
struct capiminor {
- struct list_head list;
- struct capincci *nccip;
+ struct kref kref;
+
unsigned int minor;
+ struct dentry *capifs_dentry;
struct capi20_appl *ap;
u32 ncci;
u16 datahandle;
u16 msgid;
- struct tty_struct *tty;
+ struct tty_port port;
int ttyinstop;
int ttyoutstop;
struct sk_buff *ttyskb;
- atomic_t ttyopencount;
struct sk_buff_head inqueue;
int inbytes;
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).
+ * Access to this data is done in a racy way and crashes the machine with
+ * a FritzCard DSL driver; sooner or later. This is a workaround
+ * which trades scalability vs stability, so it doesn't crash the kernel anymore.
+ * The correct (and scalable) fix for the issue seems to require
+ * an API change to the drivers... . */
+static DEFINE_SPINLOCK(workaround_lock);
struct capincci {
- struct capincci *next;
+ struct list_head list;
u32 ncci;
struct capidev *cdev;
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
struct sk_buff_head recvqueue;
wait_queue_head_t recvwait;
- struct capincci *nccis;
+ struct list_head nccis;
- struct semaphore ncci_list_sem;
+ struct mutex lock;
};
/* -------- global variables ---------------------------------------- */
-static DEFINE_RWLOCK(capidev_list_lock);
+static DEFINE_MUTEX(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
+static DEFINE_SPINLOCK(capiminors_lock);
+static struct capiminor **capiminors;
+
+static struct tty_driver *capinc_tty_driver;
+
/* -------- 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;
/* -------- struct capiminor ---------------------------------------- */
+static const struct tty_port_operations capiminor_port_ops; /* we have none */
+
static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci)
{
- struct capiminor *mp, *p;
- unsigned int minor = 0;
- unsigned long flags;
+ struct capiminor *mp;
+ struct device *dev;
+ unsigned int minor;
- mp = kmalloc(sizeof(*mp), GFP_ATOMIC);
+ mp = kzalloc(sizeof(*mp), GFP_KERNEL);
if (!mp) {
printk(KERN_ERR "capi: can't alloc capiminor\n");
return NULL;
}
- memset(mp, 0, sizeof(struct capiminor));
+ kref_init(&mp->kref);
+
mp->ap = ap;
mp->ncci = ncci;
mp->msgid = 0;
- atomic_set(&mp->ttyopencount,0);
INIT_LIST_HEAD(&mp->ackqueue);
spin_lock_init(&mp->ackqlock);
skb_queue_head_init(&mp->inqueue);
skb_queue_head_init(&mp->outqueue);
- /* Allocate the least unused minor number.
- */
- write_lock_irqsave(&capiminor_list_lock, flags);
- if (list_empty(&capiminor_list))
- list_add(&mp->list, &capiminor_list);
- else {
- list_for_each_entry(p, &capiminor_list, list) {
- if (p->minor > minor)
- break;
- minor++;
- }
-
- if (minor < capi_ttyminors) {
- mp->minor = minor;
- list_add(&mp->list, p->list.prev);
+ tty_port_init(&mp->port);
+ mp->port.ops = &capiminor_port_ops;
+
+ /* Allocate the least unused minor number. */
+ spin_lock(&capiminors_lock);
+ for (minor = 0; minor < capi_ttyminors; minor++)
+ if (!capiminors[minor]) {
+ capiminors[minor] = mp;
+ break;
}
- }
- write_unlock_irqrestore(&capiminor_list_lock, flags);
+ spin_unlock(&capiminors_lock);
- if (!(minor < capi_ttyminors)) {
+ if (minor == capi_ttyminors) {
printk(KERN_NOTICE "capi: out of minors\n");
- kfree(mp);
- return NULL;
+ goto err_out1;
}
+ mp->minor = minor;
+
+ dev = tty_register_device(capinc_tty_driver, minor, NULL);
+ if (IS_ERR(dev))
+ goto err_out2;
+
return mp;
+
+err_out2:
+ spin_lock(&capiminors_lock);
+ capiminors[minor] = NULL;
+ spin_unlock(&capiminors_lock);
+
+err_out1:
+ kfree(mp);
+ return NULL;
}
-static void capiminor_free(struct capiminor *mp)
+static void capiminor_destroy(struct kref *kref)
{
- unsigned long flags;
-
- write_lock_irqsave(&capiminor_list_lock, flags);
- list_del(&mp->list);
- write_unlock_irqrestore(&capiminor_list_lock, flags);
+ struct capiminor *mp = container_of(kref, struct capiminor, kref);
- if (mp->ttyskb) kfree_skb(mp->ttyskb);
- mp->ttyskb = NULL;
+ kfree_skb(mp->ttyskb);
skb_queue_purge(&mp->inqueue);
skb_queue_purge(&mp->outqueue);
capiminor_del_all_ack(mp);
kfree(mp);
}
-static struct capiminor *capiminor_find(unsigned int minor)
+static struct capiminor *capiminor_get(unsigned int minor)
{
- struct list_head *l;
- struct capiminor *p = NULL;
+ struct capiminor *mp;
- read_lock(&capiminor_list_lock);
- list_for_each(l, &capiminor_list) {
- p = list_entry(l, struct capiminor, list);
- if (p->minor == minor)
- break;
- }
- read_unlock(&capiminor_list_lock);
- if (l == &capiminor_list)
- return NULL;
+ spin_lock(&capiminors_lock);
+ mp = capiminors[minor];
+ if (mp)
+ kref_get(&mp->kref);
+ spin_unlock(&capiminors_lock);
- return p;
+ return mp;
+}
+
+static inline void capiminor_put(struct capiminor *mp)
+{
+ kref_put(&mp->kref, capiminor_destroy);
+}
+
+static void capiminor_free(struct capiminor *mp)
+{
+ tty_unregister_device(capinc_tty_driver, mp->minor);
+
+ spin_lock(&capiminors_lock);
+ capiminors[mp->minor] = NULL;
+ spin_unlock(&capiminors_lock);
+
+ capiminor_put(mp);
}
-#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;
+ dev_t device;
- np = kmalloc(sizeof(*np), GFP_ATOMIC);
- if (!np)
- return NULL;
- memset(np, 0, sizeof(struct capincci));
- 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
- printk(KERN_DEBUG "set mp->nccip\n");
-#endif
-#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
- capifs_new_ncci(mp->minor, MKDEV(capi_ttymajor, mp->minor));
-#endif
+ device = MKDEV(capinc_tty_driver->major, mp->minor);
+ mp->capifs_dentry = capifs_new_ncci(mp->minor, device);
}
-#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- for (pp=&cdev->nccis; *pp; pp = &(*pp)->next)
- ;
- *pp = np;
- return np;
}
-static void capincci_free(struct capidev *cdev, u32 ncci)
+static void capincci_free_minor(struct capincci *np)
{
- struct capincci *np, **pp;
-#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- struct capiminor *mp;
-#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
+ struct capiminor *mp = np->minorp;
+ struct tty_struct *tty;
- 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) != 0) {
-#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
- capifs_free_ncci(mp->minor);
-#endif
- 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 */
- kfree(np);
- if (*pp == 0) return;
- } else {
- pp = &(*pp)->next;
+ if (mp) {
+ capifs_free_ncci(mp->capifs_dentry);
+
+ tty = tty_port_tty_get(&mp->port);
+ if (tty) {
+ tty_vhangup(tty);
+ tty_kref_put(tty);
}
+
+ capiminor_free(mp);
}
}
-static struct capincci *capincci_find(struct capidev *cdev, u32 ncci)
+static inline unsigned int capincci_minor_opencount(struct capincci *np)
{
- struct capincci *p;
+ struct capiminor *mp = np->minorp;
+ unsigned int count = 0;
+ struct tty_struct *tty;
- for (p=cdev->nccis; p ; p = p->next) {
- if (p->ncci == ncci)
- break;
+ if (mp) {
+ tty = tty_port_tty_get(&mp->port);
+ if (tty) {
+ count = tty->count;
+ tty_kref_put(tty);
+ }
}
- return p;
+ return count;
}
-/* -------- struct capidev ------------------------------------------ */
+#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 struct capidev *capidev_alloc(void)
+static inline unsigned int capincci_minor_opencount(struct capincci *np)
{
- struct capidev *cdev;
- unsigned long flags;
+ return 0;
+}
- cdev = kmalloc(sizeof(*cdev), GFP_KERNEL);
- if (!cdev)
+#endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
+
+static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
+{
+ struct capincci *np;
+
+ np = kzalloc(sizeof(*np), GFP_KERNEL);
+ if (!np)
return NULL;
- memset(cdev, 0, sizeof(struct capidev));
+ np->ncci = ncci;
+ np->cdev = cdev;
- init_MUTEX(&cdev->ncci_list_sem);
- skb_queue_head_init(&cdev->recvqueue);
- init_waitqueue_head(&cdev->recvwait);
- write_lock_irqsave(&capidev_list_lock, flags);
- list_add_tail(&cdev->list, &capidev_list);
- write_unlock_irqrestore(&capidev_list_lock, flags);
- return cdev;
+ capincci_alloc_minor(cdev, np);
+
+ list_add_tail(&np->list, &cdev->nccis);
+
+ return np;
}
-static void capidev_free(struct capidev *cdev)
+static void capincci_free(struct capidev *cdev, u32 ncci)
{
- unsigned long flags;
+ struct capincci *np, *tmp;
- if (cdev->ap.applid) {
- capi20_release(&cdev->ap);
- cdev->ap.applid = 0;
- }
- skb_queue_purge(&cdev->recvqueue);
+ list_for_each_entry_safe(np, tmp, &cdev->nccis, list)
+ if (ncci == 0xffffffff || np->ncci == ncci) {
+ capincci_free_minor(np);
+ list_del(&np->list);
+ kfree(np);
+ }
+}
- down(&cdev->ncci_list_sem);
- capincci_free(cdev, 0xffffffff);
- up(&cdev->ncci_list_sem);
+static struct capincci *capincci_find(struct capidev *cdev, u32 ncci)
+{
+ struct capincci *np;
- write_lock_irqsave(&capidev_list_lock, flags);
- list_del(&cdev->list);
- write_unlock_irqrestore(&capidev_list_lock, flags);
- kfree(cdev);
+ list_for_each_entry(np, &cdev->nccis, list)
+ if (np->ncci == ncci)
+ return np;
+ return NULL;
}
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb)
{
+ unsigned int datalen = skb->len - CAPIMSG_LEN(skb->data);
+ struct tty_struct *tty;
struct sk_buff *nskb;
- int datalen;
u16 errcode, datahandle;
struct tty_ldisc *ld;
-
- datalen = skb->len - CAPIMSG_LEN(skb->data);
- if (mp->tty == NULL)
- {
+ int ret = -1;
+
+ tty = tty_port_tty_get(&mp->port);
+ if (!tty) {
#ifdef _DEBUG_DATAFLOW
printk(KERN_DEBUG "capi: currently no receiver\n");
#endif
return -1;
}
- ld = tty_ldisc_ref(mp->tty);
- if (ld == NULL)
- return -1;
- if (ld->receive_buf == NULL) {
+ ld = tty_ldisc_ref(tty);
+ if (!ld) {
+ /* fatal error, do not requeue */
+ ret = 0;
+ kfree_skb(skb);
+ goto deref_tty;
+ }
+
+ if (ld->ops->receive_buf == NULL) {
#if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
printk(KERN_DEBUG "capi: ldisc has no receive_buf function\n");
#endif
- goto bad;
+ /* fatal error, do not requeue */
+ goto free_skb;
}
if (mp->ttyinstop) {
#if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
printk(KERN_DEBUG "capi: recv tty throttled\n");
#endif
- goto bad;
+ goto deref_ldisc;
}
- if (mp->tty->receive_room < datalen) {
+
+ if (tty->receive_room < datalen) {
#if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
printk(KERN_DEBUG "capi: no room in tty\n");
#endif
- goto bad;
+ goto deref_ldisc;
}
- if ((nskb = gen_data_b3_resp_for(mp, skb)) == 0) {
+
+ nskb = gen_data_b3_resp_for(mp, skb);
+ if (!nskb) {
printk(KERN_ERR "capi: gen_data_b3_resp failed\n");
- goto bad;
+ goto deref_ldisc;
}
- datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4);
+
+ datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4);
+
errcode = capi20_put_message(mp->ap, nskb);
- if (errcode != CAPI_NOERROR) {
+
+ if (errcode == CAPI_NOERROR) {
+ skb_pull(skb, CAPIMSG_LEN(skb->data));
+#ifdef _DEBUG_DATAFLOW
+ printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n",
+ datahandle, skb->len);
+#endif
+ ld->ops->receive_buf(tty, skb->data, NULL, skb->len);
+ } else {
printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n",
errcode);
kfree_skb(nskb);
- goto bad;
+
+ if (errcode == CAPI_SENDQUEUEFULL)
+ goto deref_ldisc;
}
- (void)skb_pull(skb, CAPIMSG_LEN(skb->data));
-#ifdef _DEBUG_DATAFLOW
- printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n",
- datahandle, skb->len);
-#endif
- ld->receive_buf(mp->tty, skb->data, NULL, skb->len);
+
+free_skb:
+ ret = 0;
kfree_skb(skb);
+
+deref_ldisc:
tty_ldisc_deref(ld);
- return 0;
-bad:
- tty_ldisc_deref(ld);
- return -1;
+
+deref_tty:
+ tty_kref_put(tty);
+ return ret;
}
static void handle_minor_recv(struct capiminor *mp)
{
struct sk_buff *skb;
- while ((skb = skb_dequeue(&mp->inqueue)) != 0) {
+ while ((skb = skb_dequeue(&mp->inqueue)) != NULL) {
unsigned int len = skb->len;
mp->inbytes -= len;
if (handle_recv_skb(mp, skb) < 0) {
static int handle_minor_send(struct capiminor *mp)
{
+ struct tty_struct *tty;
struct sk_buff *skb;
u16 len;
int count = 0;
u16 errcode;
u16 datahandle;
- if (mp->tty && mp->ttyoutstop) {
+ tty = tty_port_tty_get(&mp->port);
+ if (!tty)
+ return 0;
+
+ if (mp->ttyoutstop) {
#if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
printk(KERN_DEBUG "capi: send: tty stopped\n");
#endif
+ tty_kref_put(tty);
return 0;
}
- while ((skb = skb_dequeue(&mp->outqueue)) != 0) {
+ while ((skb = skb_dequeue(&mp->outqueue)) != NULL) {
datahandle = mp->datahandle;
len = (u16)skb->len;
skb_push(skb, CAPI_DATA_B3_REQ_LEN);
capimsg_setu8 (skb->data, 5, CAPI_REQ);
capimsg_setu16(skb->data, 6, mp->msgid++);
capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */
- capimsg_setu32(skb->data, 12, (u32) skb->data); /* Data32 */
+ capimsg_setu32(skb->data, 12, (u32)(long)skb->data);/* Data32 */
capimsg_setu16(skb->data, 16, len); /* Data length */
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);
+ tty_kref_put(tty);
return count;
}
errcode = capi20_put_message(mp->ap, skb);
mp->outbytes -= len;
kfree_skb(skb);
}
+ tty_kref_put(tty);
return count;
}
{
struct capidev *cdev = ap->private;
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
+ struct tty_struct *tty;
struct capiminor *mp;
u16 datahandle;
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
struct capincci *np;
- u32 ncci;
+ unsigned long flags;
+
+ mutex_lock(&cdev->lock);
if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) {
u16 info = CAPIMSG_U16(skb->data, 12); // Info field
- if (info == 0) {
- down(&cdev->ncci_list_sem);
+ if ((info & 0xff00) == 0)
capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
- up(&cdev->ncci_list_sem);
- }
}
- if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) {
- down(&cdev->ncci_list_sem);
+ if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND)
capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
- up(&cdev->ncci_list_sem);
- }
+
+ spin_lock_irqsave(&workaround_lock, flags);
if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) {
skb_queue_tail(&cdev->recvqueue, skb);
wake_up_interruptible(&cdev->recvwait);
- return;
+ goto unlock_out;
}
- ncci = CAPIMSG_CONTROL(skb->data);
- for (np = cdev->nccis; np && np->ncci != ncci; np = np->next)
- ;
+
+ np = capincci_find(cdev, CAPIMSG_CONTROL(skb->data));
if (!np) {
printk(KERN_ERR "BUG: capi_signal: ncci not found\n");
skb_queue_tail(&cdev->recvqueue, skb);
wake_up_interruptible(&cdev->recvwait);
- return;
+ goto unlock_out;
}
+
#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);
wake_up_interruptible(&cdev->recvwait);
- return;
+ goto unlock_out;
}
-
-
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",
#endif
kfree_skb(skb);
(void)capiminor_del_ack(mp, datahandle);
- if (mp->tty)
- tty_wakeup(mp->tty);
+ tty = tty_port_tty_get(&mp->port);
+ if (tty) {
+ tty_wakeup(tty);
+ tty_kref_put(tty);
+ }
(void)handle_minor_send(mp);
} else {
wake_up_interruptible(&cdev->recvwait);
}
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
+
+unlock_out:
+ spin_unlock_irqrestore(&workaround_lock, flags);
+ mutex_unlock(&cdev->lock);
}
/* -------- file_operations for capidev ----------------------------- */
struct capidev *cdev = (struct capidev *)file->private_data;
struct sk_buff *skb;
size_t copied;
+ int err;
if (!cdev->ap.applid)
return -ENODEV;
- if ((skb = skb_dequeue(&cdev->recvqueue)) == 0) {
-
+ skb = skb_dequeue(&cdev->recvqueue);
+ if (!skb) {
if (file->f_flags & O_NONBLOCK)
return -EAGAIN;
-
- for (;;) {
- interruptible_sleep_on(&cdev->recvwait);
- if ((skb = skb_dequeue(&cdev->recvqueue)) != 0)
- break;
- if (signal_pending(current))
- break;
- }
- if (skb == 0)
- return -ERESTARTNOHAND;
+ err = wait_event_interruptible(cdev->recvwait,
+ (skb = skb_dequeue(&cdev->recvqueue)));
+ if (err)
+ return err;
}
if (skb->len > count) {
skb_queue_head(&cdev->recvqueue, skb);
CAPIMSG_SETAPPID(skb->data, cdev->ap.applid);
if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) {
- down(&cdev->ncci_list_sem);
+ mutex_lock(&cdev->lock);
capincci_free(cdev, CAPIMSG_NCCI(skb->data));
- up(&cdev->ncci_list_sem);
+ mutex_unlock(&cdev->lock);
}
cdev->errcode = capi20_put_message(&cdev->ap, skb);
unsigned int cmd, unsigned long arg)
{
struct capidev *cdev = file->private_data;
- struct capi20_appl *ap = &cdev->ap;
capi_ioctl_struct data;
int retval = -EINVAL;
void __user *argp = (void __user *)arg;
switch (cmd) {
case CAPI_REGISTER:
- {
- if (ap->applid)
- return -EEXIST;
+ mutex_lock(&cdev->lock);
- if (copy_from_user(&cdev->ap.rparam, argp,
- sizeof(struct capi_register_params)))
- return -EFAULT;
-
- cdev->ap.private = cdev;
- cdev->ap.recv_message = capi_recv_message;
- cdev->errcode = capi20_register(ap);
- if (cdev->errcode) {
- ap->applid = 0;
- return -EIO;
- }
+ if (cdev->ap.applid) {
+ retval = -EEXIST;
+ goto register_out;
+ }
+ if (copy_from_user(&cdev->ap.rparam, argp,
+ sizeof(struct capi_register_params))) {
+ retval = -EFAULT;
+ goto register_out;
+ }
+ cdev->ap.private = cdev;
+ cdev->ap.recv_message = capi_recv_message;
+ cdev->errcode = capi20_register(&cdev->ap);
+ retval = (int)cdev->ap.applid;
+ if (cdev->errcode) {
+ cdev->ap.applid = 0;
+ retval = -EIO;
}
- return (int)ap->applid;
+
+register_out:
+ mutex_unlock(&cdev->lock);
+ return retval;
case CAPI_GET_VERSION:
{
return 0;
case CAPI_SET_FLAGS:
- case CAPI_CLR_FLAGS:
- {
- unsigned userflags;
- if (copy_from_user(&userflags, argp,
- sizeof(userflags)))
- return -EFAULT;
- if (cmd == CAPI_SET_FLAGS)
- cdev->userflags |= userflags;
- else
- cdev->userflags &= ~userflags;
- }
- return 0;
+ case CAPI_CLR_FLAGS: {
+ unsigned userflags;
+ if (copy_from_user(&userflags, argp, sizeof(userflags)))
+ return -EFAULT;
+
+ mutex_lock(&cdev->lock);
+ if (cmd == CAPI_SET_FLAGS)
+ cdev->userflags |= userflags;
+ else
+ cdev->userflags &= ~userflags;
+ mutex_unlock(&cdev->lock);
+ return 0;
+ }
case CAPI_GET_FLAGS:
if (copy_to_user(argp, &cdev->userflags,
sizeof(cdev->userflags)))
return -EFAULT;
return 0;
- 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)))
- return -EFAULT;
+ case CAPI_NCCI_OPENCOUNT: {
+ struct capincci *nccip;
+ unsigned ncci;
+ int count = 0;
- down(&cdev->ncci_list_sem);
- if ((nccip = capincci_find(cdev, (u32) ncci)) == 0) {
- up(&cdev->ncci_list_sem);
- return 0;
- }
-#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- if ((mp = nccip->minorp) != 0) {
- count += atomic_read(&mp->ttyopencount);
- }
-#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
- up(&cdev->ncci_list_sem);
- return count;
- }
- return 0;
+ if (copy_from_user(&ncci, argp, sizeof(ncci)))
+ return -EFAULT;
+
+ mutex_lock(&cdev->lock);
+ nccip = capincci_find(cdev, (u32)ncci);
+ if (nccip)
+ count = capincci_minor_opencount(nccip);
+ mutex_unlock(&cdev->lock);
+ return count;
+ }
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- case CAPI_NCCI_GETUNIT:
- {
- struct capincci *nccip;
- struct capiminor *mp;
- unsigned ncci;
- int unit = 0;
- if (copy_from_user(&ncci, argp,
- sizeof(ncci)))
- return -EFAULT;
- down(&cdev->ncci_list_sem);
- nccip = capincci_find(cdev, (u32) ncci);
- if (!nccip || (mp = nccip->minorp) == 0) {
- up(&cdev->ncci_list_sem);
- return -ESRCH;
- }
- unit = mp->minor;
- up(&cdev->ncci_list_sem);
- return unit;
+ case CAPI_NCCI_GETUNIT: {
+ struct capincci *nccip;
+ struct capiminor *mp;
+ unsigned ncci;
+ int unit = -ESRCH;
+
+ if (copy_from_user(&ncci, argp, sizeof(ncci)))
+ return -EFAULT;
+
+ mutex_lock(&cdev->lock);
+ nccip = capincci_find(cdev, (u32)ncci);
+ if (nccip) {
+ mp = nccip->minorp;
+ if (mp)
+ unit = mp->minor;
}
- return 0;
+ mutex_unlock(&cdev->lock);
+ return unit;
+ }
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
+
+ default:
+ return -EINVAL;
}
- return -EINVAL;
}
-static int
-capi_open(struct inode *inode, struct file *file)
+static int capi_open(struct inode *inode, struct file *file)
{
- if (file->private_data)
- return -EEXIST;
+ struct capidev *cdev;
- if ((file->private_data = capidev_alloc()) == 0)
+ cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
+ if (!cdev)
return -ENOMEM;
+ mutex_init(&cdev->lock);
+ skb_queue_head_init(&cdev->recvqueue);
+ init_waitqueue_head(&cdev->recvwait);
+ INIT_LIST_HEAD(&cdev->nccis);
+ file->private_data = cdev;
+
+ mutex_lock(&capidev_list_lock);
+ list_add_tail(&cdev->list, &capidev_list);
+ mutex_unlock(&capidev_list_lock);
+
return nonseekable_open(inode, file);
}
-static int
-capi_release(struct inode *inode, struct file *file)
+static int capi_release(struct inode *inode, struct file *file)
{
- struct capidev *cdev = (struct capidev *)file->private_data;
+ struct capidev *cdev = file->private_data;
- capidev_free(cdev);
- file->private_data = NULL;
-
+ mutex_lock(&capidev_list_lock);
+ list_del(&cdev->list);
+ mutex_unlock(&capidev_list_lock);
+
+ if (cdev->ap.applid)
+ capi20_release(&cdev->ap);
+ skb_queue_purge(&cdev->recvqueue);
+ capincci_free(cdev, 0xffffffff);
+
+ kfree(cdev);
return 0;
}
-static struct file_operations capi_fops =
+static const struct file_operations capi_fops =
{
.owner = THIS_MODULE,
.llseek = no_llseek,
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
/* -------- tty_operations for capincci ----------------------------- */
-static int capinc_tty_open(struct tty_struct * tty, struct file * file)
+static int
+capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty)
{
- struct capiminor *mp;
+ int idx = tty->index;
+ struct capiminor *mp = capiminor_get(idx);
+ int ret = tty_init_termios(tty);
+
+ if (ret == 0) {
+ tty_driver_kref_get(driver);
+ tty->count++;
+ tty->driver_data = mp;
+ driver->ttys[idx] = tty;
+ } else
+ capiminor_put(mp);
+ return ret;
+}
- if ((mp = capiminor_find(iminor(file->f_dentry->d_inode))) == 0)
- return -ENXIO;
- if (mp->nccip == 0)
- return -ENXIO;
+static void capinc_tty_cleanup(struct tty_struct *tty)
+{
+ struct capiminor *mp = tty->driver_data;
+ tty->driver_data = NULL;
+ capiminor_put(mp);
+}
+
+static int capinc_tty_open(struct tty_struct *tty, struct file *filp)
+{
+ struct capiminor *mp = tty->driver_data;
+ unsigned long flags;
+ int err;
- tty->driver_data = (void *)mp;
+ err = tty_port_open(&mp->port, tty, filp);
+ if (err)
+ return err;
- if (atomic_read(&mp->ttyopencount) == 0)
- mp->tty = tty;
- atomic_inc(&mp->ttyopencount);
-#ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "capinc_tty_open ocount=%d\n", atomic_read(&mp->ttyopencount));
-#endif
+ spin_lock_irqsave(&workaround_lock, flags);
handle_minor_recv(mp);
+ spin_unlock_irqrestore(&workaround_lock, flags);
return 0;
}
-static void capinc_tty_close(struct tty_struct * tty, struct file * file)
+static void capinc_tty_close(struct tty_struct *tty, struct file *filp)
{
- struct capiminor *mp;
+ struct capiminor *mp = tty->driver_data;
- mp = (struct capiminor *)tty->driver_data;
- if (mp) {
- if (atomic_dec_and_test(&mp->ttyopencount)) {
-#ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "capinc_tty_close lastclose\n");
-#endif
- tty->driver_data = NULL;
- mp->tty = NULL;
- }
-#ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "capinc_tty_close ocount=%d\n", atomic_read(&mp->ttyopencount));
-#endif
- if (mp->nccip == 0)
- capiminor_free(mp);
- }
-
-#ifdef _DEBUG_REFCOUNT
- printk(KERN_DEBUG "capinc_tty_close\n");
-#endif
+ tty_port_close(&mp->port, tty, filp);
}
-static int capinc_tty_write(struct tty_struct * tty,
+static int capinc_tty_write(struct tty_struct *tty,
const unsigned char *buf, int count)
{
- struct capiminor *mp = (struct capiminor *)tty->driver_data;
+ struct capiminor *mp = tty->driver_data;
struct sk_buff *skb;
+ unsigned long flags;
#ifdef _DEBUG_TTYFUNCS
printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count);
#endif
- if (!mp || !mp->nccip) {
-#ifdef _DEBUG_TTYFUNCS
- printk(KERN_DEBUG "capinc_tty_write: mp or mp->ncci NULL\n");
-#endif
- return 0;
- }
-
+ spin_lock_irqsave(&workaround_lock, flags);
skb = mp->ttyskb;
if (skb) {
mp->ttyskb = NULL;
skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC);
if (!skb) {
printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n");
+ spin_unlock_irqrestore(&workaround_lock, flags);
return -ENOMEM;
}
skb_queue_tail(&mp->outqueue, skb);
mp->outbytes += skb->len;
(void)handle_minor_send(mp);
- (void)handle_minor_recv(mp);
+ spin_unlock_irqrestore(&workaround_lock, flags);
return count;
}
-static void capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
+static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
{
- struct capiminor *mp = (struct capiminor *)tty->driver_data;
+ struct capiminor *mp = tty->driver_data;
struct sk_buff *skb;
+ unsigned long flags;
+ int ret = 1;
#ifdef _DEBUG_TTYFUNCS
printk(KERN_DEBUG "capinc_put_char(%u)\n", ch);
#endif
- if (!mp || !mp->nccip) {
-#ifdef _DEBUG_TTYFUNCS
- printk(KERN_DEBUG "capinc_tty_put_char: mp or mp->ncci NULL\n");
-#endif
- return;
- }
-
+ spin_lock_irqsave(&workaround_lock, flags);
skb = mp->ttyskb;
if (skb) {
if (skb_tailroom(skb) > 0) {
*(skb_put(skb, 1)) = ch;
- return;
+ spin_unlock_irqrestore(&workaround_lock, flags);
+ return 1;
}
mp->ttyskb = NULL;
skb_queue_tail(&mp->outqueue, skb);
mp->ttyskb = skb;
} else {
printk(KERN_ERR "capinc_put_char: char %u lost\n", ch);
+ ret = 0;
}
+ spin_unlock_irqrestore(&workaround_lock, flags);
+ return ret;
}
static void capinc_tty_flush_chars(struct tty_struct *tty)
{
- struct capiminor *mp = (struct capiminor *)tty->driver_data;
+ struct capiminor *mp = tty->driver_data;
struct sk_buff *skb;
+ unsigned long flags;
#ifdef _DEBUG_TTYFUNCS
printk(KERN_DEBUG "capinc_tty_flush_chars\n");
#endif
- if (!mp || !mp->nccip) {
-#ifdef _DEBUG_TTYFUNCS
- printk(KERN_DEBUG "capinc_tty_flush_chars: mp or mp->ncci NULL\n");
-#endif
- return;
- }
-
+ spin_lock_irqsave(&workaround_lock, flags);
skb = mp->ttyskb;
if (skb) {
mp->ttyskb = NULL;
(void)handle_minor_send(mp);
}
(void)handle_minor_recv(mp);
+ spin_unlock_irqrestore(&workaround_lock, flags);
}
static int capinc_tty_write_room(struct tty_struct *tty)
{
- struct capiminor *mp = (struct capiminor *)tty->driver_data;
+ struct capiminor *mp = tty->driver_data;
int room;
- if (!mp || !mp->nccip) {
-#ifdef _DEBUG_TTYFUNCS
- printk(KERN_DEBUG "capinc_tty_write_room: mp or mp->ncci NULL\n");
-#endif
- return 0;
- }
+
room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue);
room *= CAPI_MAX_BLKSIZE;
#ifdef _DEBUG_TTYFUNCS
static int capinc_tty_chars_in_buffer(struct tty_struct *tty)
{
- struct capiminor *mp = (struct capiminor *)tty->driver_data;
- if (!mp || !mp->nccip) {
-#ifdef _DEBUG_TTYFUNCS
- printk(KERN_DEBUG "capinc_tty_chars_in_buffer: mp or mp->ncci NULL\n");
-#endif
- return 0;
- }
+ struct capiminor *mp = tty->driver_data;
+
#ifdef _DEBUG_TTYFUNCS
printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n",
mp->outbytes, mp->nack,
int error = 0;
switch (cmd) {
default:
- error = n_tty_ioctl (tty, file, cmd, arg);
+ error = n_tty_ioctl_helper(tty, file, cmd, arg);
break;
}
return error;
}
-static void capinc_tty_set_termios(struct tty_struct *tty, struct termios * old)
+static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios * old)
{
#ifdef _DEBUG_TTYFUNCS
printk(KERN_DEBUG "capinc_tty_set_termios\n");
#endif
}
-static void capinc_tty_throttle(struct tty_struct * tty)
+static void capinc_tty_throttle(struct tty_struct *tty)
{
- struct capiminor *mp = (struct capiminor *)tty->driver_data;
+ struct capiminor *mp = tty->driver_data;
#ifdef _DEBUG_TTYFUNCS
printk(KERN_DEBUG "capinc_tty_throttle\n");
#endif
- if (mp)
- mp->ttyinstop = 1;
+ mp->ttyinstop = 1;
}
-static void capinc_tty_unthrottle(struct tty_struct * tty)
+static void capinc_tty_unthrottle(struct tty_struct *tty)
{
- struct capiminor *mp = (struct capiminor *)tty->driver_data;
+ struct capiminor *mp = tty->driver_data;
+ unsigned long flags;
+
#ifdef _DEBUG_TTYFUNCS
printk(KERN_DEBUG "capinc_tty_unthrottle\n");
#endif
- if (mp) {
- mp->ttyinstop = 0;
- handle_minor_recv(mp);
- }
+ spin_lock_irqsave(&workaround_lock, flags);
+ mp->ttyinstop = 0;
+ handle_minor_recv(mp);
+ spin_unlock_irqrestore(&workaround_lock, flags);
}
static void capinc_tty_stop(struct tty_struct *tty)
{
- struct capiminor *mp = (struct capiminor *)tty->driver_data;
+ struct capiminor *mp = tty->driver_data;
+
#ifdef _DEBUG_TTYFUNCS
printk(KERN_DEBUG "capinc_tty_stop\n");
#endif
- if (mp) {
- mp->ttyoutstop = 1;
- }
+ mp->ttyoutstop = 1;
}
static void capinc_tty_start(struct tty_struct *tty)
{
- struct capiminor *mp = (struct capiminor *)tty->driver_data;
+ struct capiminor *mp = tty->driver_data;
+ unsigned long flags;
+
#ifdef _DEBUG_TTYFUNCS
printk(KERN_DEBUG "capinc_tty_start\n");
#endif
- if (mp) {
- mp->ttyoutstop = 0;
- (void)handle_minor_send(mp);
- }
+ spin_lock_irqsave(&workaround_lock, flags);
+ mp->ttyoutstop = 0;
+ (void)handle_minor_send(mp);
+ spin_unlock_irqrestore(&workaround_lock, flags);
}
static void capinc_tty_hangup(struct tty_struct *tty)
{
+ struct capiminor *mp = tty->driver_data;
+
#ifdef _DEBUG_TTYFUNCS
printk(KERN_DEBUG "capinc_tty_hangup\n");
#endif
+ tty_port_hangup(&mp->port);
}
-static void capinc_tty_break_ctl(struct tty_struct *tty, int state)
+static int capinc_tty_break_ctl(struct tty_struct *tty, int state)
{
#ifdef _DEBUG_TTYFUNCS
printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state);
#endif
+ return 0;
}
static void capinc_tty_flush_buffer(struct tty_struct *tty)
#endif
}
-static int capinc_tty_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{
- return 0;
-}
-
-static struct tty_driver *capinc_tty_driver;
-
static const struct tty_operations capinc_ops = {
.open = capinc_tty_open,
.close = capinc_tty_close,
.flush_buffer = capinc_tty_flush_buffer,
.set_ldisc = capinc_tty_set_ldisc,
.send_xchar = capinc_tty_send_xchar,
- .read_proc = capinc_tty_read_proc,
+ .install = capinc_tty_install,
+ .cleanup = capinc_tty_cleanup,
};
-static int capinc_tty_init(void)
+static int __init capinc_tty_init(void)
{
struct tty_driver *drv;
-
+ int err;
+
if (capi_ttyminors > CAPINC_MAX_PORTS)
capi_ttyminors = CAPINC_MAX_PORTS;
if (capi_ttyminors <= 0)
capi_ttyminors = CAPINC_NR_PORTS;
- drv = alloc_tty_driver(capi_ttyminors);
- if (!drv)
+ capiminors = kzalloc(sizeof(struct capi_minor *) * capi_ttyminors,
+ GFP_KERNEL);
+ if (!capiminors)
return -ENOMEM;
+ drv = alloc_tty_driver(capi_ttyminors);
+ if (!drv) {
+ kfree(capiminors);
+ return -ENOMEM;
+ }
drv->owner = THIS_MODULE;
drv->driver_name = "capi_nc";
drv->name = "capi";
- drv->major = capi_ttymajor;
+ drv->major = 0;
drv->minor_start = 0;
drv->type = TTY_DRIVER_TYPE_SERIAL;
drv->subtype = SERIAL_TYPE_NORMAL;
drv->init_termios.c_oflag = OPOST | ONLCR;
drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
drv->init_termios.c_lflag = 0;
- drv->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_RESET_TERMIOS;
+ drv->flags =
+ TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS |
+ TTY_DRIVER_DYNAMIC_DEV;
tty_set_operations(drv, &capinc_ops);
- if (tty_register_driver(drv)) {
+
+ err = tty_register_driver(drv);
+ if (err) {
put_tty_driver(drv);
+ kfree(capiminors);
printk(KERN_ERR "Couldn't register capi_nc driver\n");
- return -1;
+ return err;
}
capinc_tty_driver = drv;
return 0;
}
-static void capinc_tty_exit(void)
+static void __exit capinc_tty_exit(void)
{
- struct tty_driver *drv = capinc_tty_driver;
- int retval;
- if ((retval = tty_unregister_driver(drv)))
- printk(KERN_ERR "capi: failed to unregister capi_nc driver (%d)\n", retval);
- put_tty_driver(drv);
+ tty_unregister_driver(capinc_tty_driver);
+ put_tty_driver(capinc_tty_driver);
+ kfree(capiminors);
}
-#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 ----------------------------------------- */
* /proc/capi/capi20:
* minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt
*/
-static int proc_capidev_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+static int capi20_proc_show(struct seq_file *m, void *v)
{
struct capidev *cdev;
struct list_head *l;
- int len = 0;
- read_lock(&capidev_list_lock);
+ mutex_lock(&capidev_list_lock);
list_for_each(l, &capidev_list) {
cdev = list_entry(l, struct capidev, list);
- len += sprintf(page+len, "0 %d %lu %lu %lu %lu\n",
+ seq_printf(m, "0 %d %lu %lu %lu %lu\n",
cdev->ap.applid,
cdev->ap.nrecvctlpkt,
cdev->ap.nrecvdatapkt,
cdev->ap.nsentctlpkt,
cdev->ap.nsentdatapkt);
- if (len <= off) {
- off -= len;
- len = 0;
- } else {
- if (len-off > count)
- goto endloop;
- }
}
+ mutex_unlock(&capidev_list_lock);
+ return 0;
+}
-endloop:
- read_unlock(&capidev_list_lock);
- if (len < count)
- *eof = 1;
- if (len > count) len = count;
- if (len < 0) len = 0;
- return len;
+static int capi20_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, capi20_proc_show, NULL);
}
+static const struct file_operations capi20_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = capi20_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
/*
* /proc/capi/capi20ncci:
* applid ncci
*/
-static int proc_capincci_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+static int capi20ncci_proc_show(struct seq_file *m, void *v)
{
- struct capidev *cdev;
- struct capincci *np;
- struct list_head *l;
- int len = 0;
+ struct capidev *cdev;
+ struct capincci *np;
- read_lock(&capidev_list_lock);
- list_for_each(l, &capidev_list) {
- cdev = list_entry(l, struct capidev, list);
- for (np=cdev->nccis; np; np = np->next) {
- len += sprintf(page+len, "%d 0x%x\n",
- cdev->ap.applid,
- np->ncci);
- if (len <= off) {
- off -= len;
- len = 0;
- } else {
- if (len-off > count)
- goto endloop;
- }
- }
+ mutex_lock(&capidev_list_lock);
+ list_for_each_entry(cdev, &capidev_list, list) {
+ mutex_lock(&cdev->lock);
+ list_for_each_entry(np, &cdev->nccis, list)
+ seq_printf(m, "%d 0x%x\n", cdev->ap.applid, np->ncci);
+ mutex_unlock(&cdev->lock);
}
-endloop:
- read_unlock(&capidev_list_lock);
- *start = page+off;
- if (len < count)
- *eof = 1;
- if (len>count) len = count;
- if (len<0) len = 0;
- return len;
+ mutex_unlock(&capidev_list_lock);
+ return 0;
}
-static struct procfsentries {
- char *name;
- mode_t mode;
- int (*read_proc)(char *page, char **start, off_t off,
- int count, int *eof, void *data);
- struct proc_dir_entry *procent;
-} procfsentries[] = {
- /* { "capi", S_IFDIR, 0 }, */
- { "capi/capi20", 0 , proc_capidev_read_proc },
- { "capi/capi20ncci", 0 , proc_capincci_read_proc },
+static int capi20ncci_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, capi20ncci_proc_show, NULL);
+}
+
+static const struct file_operations capi20ncci_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = capi20ncci_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
};
static void __init proc_init(void)
{
- int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]);
- int i;
-
- for (i=0; i < nelem; i++) {
- struct procfsentries *p = procfsentries + i;
- p->procent = create_proc_entry(p->name, p->mode, NULL);
- if (p->procent) p->procent->read_proc = p->read_proc;
- }
+ proc_create("capi/capi20", 0, NULL, &capi20_proc_fops);
+ proc_create("capi/capi20ncci", 0, NULL, &capi20ncci_proc_fops);
}
static void __exit proc_exit(void)
{
- int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]);
- int i;
-
- for (i=nelem-1; i >= 0; i--) {
- struct procfsentries *p = procfsentries + i;
- if (p->procent) {
- remove_proc_entry(p->name, NULL);
- p->procent = NULL;
- }
- }
+ remove_proc_entry("capi/capi20", NULL);
+ remove_proc_entry("capi/capi20ncci", NULL);
}
/* -------- init function and module interface ---------------------- */
-static char rev[32];
-
static int __init capi_init(void)
{
- char *p;
- char *compileinfo;
+ const char *compileinfo;
int major_ret;
- if ((p = strchr(revision, ':')) != 0 && p[1]) {
- strlcpy(rev, p + 2, sizeof(rev));
- if ((p = strchr(rev, '$')) != 0 && p > rev)
- *(p-1) = 0;
- } else
- strcpy(rev, "1.0");
-
major_ret = register_chrdev(capi_major, "capi20", &capi_fops);
if (major_ret < 0) {
printk(KERN_ERR "capi20: unable to get major %d\n", capi_major);
return PTR_ERR(capi_class);
}
- class_device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
+ device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
-#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
if (capinc_tty_init() < 0) {
- class_device_destroy(capi_class, MKDEV(capi_major, 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
- printk(KERN_NOTICE "capi20: Rev %s: started up with major %d%s\n",
- rev, capi_major, compileinfo);
+ printk(KERN_NOTICE "CAPI 2.0 started up with major %d%s\n",
+ capi_major, compileinfo);
return 0;
}
{
proc_exit();
- class_device_destroy(capi_class, MKDEV(capi_major, 0));
+ device_destroy(capi_class, MKDEV(capi_major, 0));
class_destroy(capi_class);
unregister_chrdev(capi_major, "capi20");
-#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
capinc_tty_exit();
-#endif
- printk(KERN_NOTICE "capi: Rev %s: unloaded\n", rev);
}
module_init(capi_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff