cregit-Linux how code gets into the kernel

Release 4.8 net/irda/ircomm/ircomm_core.c

Directory: net/irda/ircomm
/*********************************************************************
 *
 * Filename:      ircomm_core.c
 * Version:       1.0
 * Description:   IrCOMM service interface
 * Status:        Experimental.
 * Author:        Dag Brattli <dagb@cs.uit.no>
 * Created at:    Sun Jun  6 20:37:34 1999
 * Modified at:   Tue Dec 21 13:26:41 1999
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 *
 *     Copyright (c) 1999 Dag Brattli, All Rights Reserved.
 *     Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
 *
 *     This program is free software; you can redistribute it and/or
 *     modify it under the terms of the GNU General Public License as
 *     published by the Free Software Foundation; either version 2 of
 *     the License, or (at your option) any later version.
 *
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 ********************************************************************/

#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/slab.h>

#include <net/irda/irda.h>
#include <net/irda/irmod.h>
#include <net/irda/irlmp.h>
#include <net/irda/iriap.h>
#include <net/irda/irttp.h>
#include <net/irda/irias_object.h>

#include <net/irda/ircomm_event.h>
#include <net/irda/ircomm_lmp.h>
#include <net/irda/ircomm_ttp.h>
#include <net/irda/ircomm_param.h>
#include <net/irda/ircomm_core.h>

static int __ircomm_close(struct ircomm_cb *self);
static void ircomm_control_indication(struct ircomm_cb *self,
				      struct sk_buff *skb, int clen);

#ifdef CONFIG_PROC_FS
extern struct proc_dir_entry *proc_irda;
static int ircomm_seq_open(struct inode *, struct file *);


static const struct file_operations ircomm_proc_fops = {
	.owner		= THIS_MODULE,
	.open           = ircomm_seq_open,
	.read           = seq_read,
	.llseek         = seq_lseek,
	.release	= seq_release,
};
#endif /* CONFIG_PROC_FS */


hashbin_t *ircomm = NULL;


static int __init ircomm_init(void) { ircomm = hashbin_new(HB_LOCK); if (ircomm == NULL) { net_err_ratelimited("%s(), can't allocate hashbin!\n", __func__); return -ENOMEM; } #ifdef CONFIG_PROC_FS { struct proc_dir_entry *ent; ent = proc_create("ircomm", 0, proc_irda, &ircomm_proc_fops); if (!ent) { printk(KERN_ERR "ircomm_init: can't create /proc entry!\n"); return -ENODEV; } } #endif /* CONFIG_PROC_FS */ net_info_ratelimited("IrCOMM protocol (Dag Brattli)\n"); return 0; }

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wang chenwang chen1618.39%110.00%
stephen hemmingerstephen hemminger1416.09%110.00%
jeff garzikjeff garzik22.30%110.00%
joe perchesjoe perches22.30%110.00%
jean tourrilhesjean tourrilhes11.15%110.00%
adrian bunkadrian bunk11.15%110.00%
harvey harrisonharvey harrison11.15%110.00%
Total87100.00%10100.00%


static void __exit ircomm_cleanup(void) { hashbin_delete(ircomm, (FREE_FUNC) __ircomm_close); #ifdef CONFIG_PROC_FS remove_proc_entry("ircomm", proc_irda); #endif /* CONFIG_PROC_FS */ }

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adrian bunkadrian bunk13.12%133.33%
Total32100.00%3100.00%

/* * Function ircomm_open (client_notify) * * Start a new IrCOMM instance * */
struct ircomm_cb *ircomm_open(notify_t *notify, __u8 service_type, int line) { struct ircomm_cb *self = NULL; int ret; pr_debug("%s(), service_type=0x%02x\n", __func__ , service_type); IRDA_ASSERT(ircomm != NULL, return NULL;); self = kzalloc(sizeof(struct ircomm_cb), GFP_KERNEL); if (self == NULL) return NULL; self->notify = *notify; self->magic = IRCOMM_MAGIC; /* Check if we should use IrLMP or IrTTP */ if (service_type & IRCOMM_3_WIRE_RAW) { self->flow_status = FLOW_START; ret = ircomm_open_lsap(self); } else ret = ircomm_open_tsap(self); if (ret < 0) { kfree(self); return NULL; } self->service_type = service_type; self->line = line; hashbin_insert(ircomm, (irda_queue_t *) self, line, NULL); ircomm_next_state(self, IRCOMM_IDLE); return self; }

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pre-gitpre-git14791.30%222.22%
andrew mortonandrew morton74.35%111.11%
jean tourrilhesjean tourrilhes31.86%222.22%
joe perchesjoe perches10.62%111.11%
panagiotis issaris*panagiotis issaris*10.62%111.11%
mathias krausemathias krause10.62%111.11%
harvey harrisonharvey harrison10.62%111.11%
Total161100.00%9100.00%

EXPORT_SYMBOL(ircomm_open); /* * Function ircomm_close_instance (self) * * Remove IrCOMM instance * */
static int __ircomm_close(struct ircomm_cb *self) { /* Disconnect link if any */ ircomm_do_event(self, IRCOMM_DISCONNECT_REQUEST, NULL, NULL); /* Remove TSAP */ if (self->tsap) { irttp_close_tsap(self->tsap); self->tsap = NULL; } /* Remove LSAP */ if (self->lsap) { irlmp_close_lsap(self->lsap); self->lsap = NULL; } self->magic = 0; kfree(self); return 0; }

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/* * Function ircomm_close (self) * * Closes and removes the specified IrCOMM instance * */
int ircomm_close(struct ircomm_cb *self) { struct ircomm_cb *entry; IRDA_ASSERT(self != NULL, return -EIO;); IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EIO;); entry = hashbin_remove(ircomm, self->line, NULL); IRDA_ASSERT(entry == self, return -1;); return __ircomm_close(self); }

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Total57100.00%3100.00%

EXPORT_SYMBOL(ircomm_close); /* * Function ircomm_connect_request (self, service_type) * * Impl. of this function is differ from one of the reference. This * function does discovery as well as sending connect request * */
int ircomm_connect_request(struct ircomm_cb *self, __u8 dlsap_sel, __u32 saddr, __u32 daddr, struct sk_buff *skb, __u8 service_type) { struct ircomm_info info; int ret; IRDA_ASSERT(self != NULL, return -1;); IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;); self->service_type= service_type; info.dlsap_sel = dlsap_sel; info.saddr = saddr; info.daddr = daddr; ret = ircomm_do_event(self, IRCOMM_CONNECT_REQUEST, skb, &info); return ret; }

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Total93100.00%2100.00%

EXPORT_SYMBOL(ircomm_connect_request); /* * Function ircomm_connect_indication (self, qos, skb) * * Notify user layer about the incoming connection * */
void ircomm_connect_indication(struct ircomm_cb *self, struct sk_buff *skb, struct ircomm_info *info) { /* * If there are any data hiding in the control channel, we must * deliver it first. The side effect is that the control channel * will be removed from the skb */ if (self->notify.connect_indication) self->notify.connect_indication(self->notify.instance, self, info->qos, info->max_data_size, info->max_header_size, skb); else { pr_debug("%s(), missing handler\n", __func__); } }

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pre-gitpre-git6392.65%233.33%
jean tourrilhesjean tourrilhes22.94%116.67%
joe perchesjoe perches11.47%116.67%
harvey harrisonharvey harrison11.47%116.67%
hideaki yoshifujihideaki yoshifuji11.47%116.67%
Total68100.00%6100.00%

/* * Function ircomm_connect_response (self, userdata, max_sdu_size) * * User accepts connection * */
int ircomm_connect_response(struct ircomm_cb *self, struct sk_buff *userdata) { int ret; IRDA_ASSERT(self != NULL, return -1;); IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;); ret = ircomm_do_event(self, IRCOMM_CONNECT_RESPONSE, userdata, NULL); return ret; }

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EXPORT_SYMBOL(ircomm_connect_response); /* * Function connect_confirm (self, skb) * * Notify user layer that the link is now connected * */
void ircomm_connect_confirm(struct ircomm_cb *self, struct sk_buff *skb, struct ircomm_info *info) { if (self->notify.connect_confirm ) self->notify.connect_confirm(self->notify.instance, self, info->qos, info->max_data_size, info->max_header_size, skb); else { pr_debug("%s(), missing handler\n", __func__); } }

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pre-gitpre-git6394.03%240.00%
jean tourrilhesjean tourrilhes22.99%120.00%
joe perchesjoe perches11.49%120.00%
harvey harrisonharvey harrison11.49%120.00%
Total67100.00%5100.00%

/* * Function ircomm_data_request (self, userdata) * * Send IrCOMM data to peer device * */
int ircomm_data_request(struct ircomm_cb *self, struct sk_buff *skb) { int ret; IRDA_ASSERT(self != NULL, return -EFAULT;); IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;); IRDA_ASSERT(skb != NULL, return -EFAULT;); ret = ircomm_do_event(self, IRCOMM_DATA_REQUEST, skb, NULL); return ret; }

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Total55100.00%2100.00%

EXPORT_SYMBOL(ircomm_data_request); /* * Function ircomm_data_indication (self, skb) * * Data arrived, so deliver it to user * */
void ircomm_data_indication(struct ircomm_cb *self, struct sk_buff *skb) { IRDA_ASSERT(skb->len > 0, return;); if (self->notify.data_indication) self->notify.data_indication(self->notify.instance, self, skb); else { pr_debug("%s(), missing handler\n", __func__); } }

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pre-gitpre-git5391.38%233.33%
jean tourrilhesjean tourrilhes35.17%233.33%
harvey harrisonharvey harrison11.72%116.67%
joe perchesjoe perches11.72%116.67%
Total58100.00%6100.00%

/* * Function ircomm_process_data (self, skb) * * Data arrived which may contain control channel data * */
void ircomm_process_data(struct ircomm_cb *self, struct sk_buff *skb) { int clen; IRDA_ASSERT(skb->len > 0, return;); clen = skb->data[0]; /* * Input validation check: a stir4200/mcp2150 combinations sometimes * results in frames with clen > remaining packet size. These are * illegal; if we throw away just this frame then it seems to carry on * fine */ if (unlikely(skb->len < (clen + 1))) { pr_debug("%s() throwing away illegal frame\n", __func__); return; } /* * If there are any data hiding in the control channel, we must * deliver it first. The side effect is that the control channel * will be removed from the skb */ if (clen > 0) ircomm_control_indication(self, skb, clen); /* Remove control channel from data channel */ skb_pull(skb, clen+1); if (skb->len) ircomm_data_indication(self, skb); else { pr_debug("%s(), data was control info only!\n", __func__); } }

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robie basakrobie basak2421.82%114.29%
jean tourrilhesjean tourrilhes32.73%228.57%
harvey harrisonharvey harrison21.82%114.29%
joe perchesjoe perches21.82%114.29%
hideaki yoshifujihideaki yoshifuji10.91%114.29%
Total110100.00%7100.00%

/* * Function ircomm_control_request (self, params) * * Send control data to peer device * */
int ircomm_control_request(struct ircomm_cb *self, struct sk_buff *skb) { int ret; IRDA_ASSERT(self != NULL, return -EFAULT;); IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;); IRDA_ASSERT(skb != NULL, return -EFAULT;); ret = ircomm_do_event(self, IRCOMM_CONTROL_REQUEST, skb, NULL); return ret; }

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Total55100.00%2100.00%

EXPORT_SYMBOL(ircomm_control_request); /* * Function ircomm_control_indication (self, skb) * * Data has arrived on the control channel * */
static void ircomm_control_indication(struct ircomm_cb *self, struct sk_buff *skb, int clen) { /* Use udata for delivering data on the control channel */ if (self->notify.udata_indication) { struct sk_buff *ctrl_skb; /* We don't own the skb, so clone it */ ctrl_skb = skb_clone(skb, GFP_ATOMIC); if (!ctrl_skb) return; /* Remove data channel from control channel */ skb_trim(ctrl_skb, clen+1); self->notify.udata_indication(self->notify.instance, self, ctrl_skb); /* Drop reference count - * see ircomm_tty_control_indication(). */ dev_kfree_skb(ctrl_skb); } else { pr_debug("%s(), missing handler\n", __func__); } }

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jean tourrilhesjean tourrilhes2526.60%233.33%
harvey harrisonharvey harrison11.06%116.67%
joe perchesjoe perches11.06%116.67%
Total94100.00%6100.00%

/* * Function ircomm_disconnect_request (self, userdata, priority) * * User layer wants to disconnect the IrCOMM connection * */
int ircomm_disconnect_request(struct ircomm_cb *self, struct sk_buff *userdata) { struct ircomm_info info; int ret; IRDA_ASSERT(self != NULL, return -1;); IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;); ret = ircomm_do_event(self, IRCOMM_DISCONNECT_REQUEST, userdata, &info); return ret; }

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Total57100.00%2100.00%

EXPORT_SYMBOL(ircomm_disconnect_request); /* * Function disconnect_indication (self, skb) * * Tell user that the link has been disconnected * */
void ircomm_disconnect_indication(struct ircomm_cb *self, struct sk_buff *skb, struct ircomm_info *info) { IRDA_ASSERT(info != NULL, return;); if (self->notify.disconnect_indication) { self->notify.disconnect_indication(self->notify.instance, self, info->reason, skb); } else { pr_debug("%s(), missing handler\n", __func__); } }

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joe perchesjoe perches11.47%116.67%
harvey harrisonharvey harrison11.47%116.67%
Total68100.00%6100.00%

/* * Function ircomm_flow_request (self, flow) * * * */
void ircomm_flow_request(struct ircomm_cb *self, LOCAL_FLOW flow) { IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;); if (self->service_type == IRCOMM_3_WIRE_RAW) return; irttp_flow_request(self->tsap, flow); }

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EXPORT_SYMBOL(ircomm_flow_request); #ifdef CONFIG_PROC_FS
static void *ircomm_seq_start(struct seq_file *seq, loff_t *pos) { struct ircomm_cb *self; loff_t off = 0; spin_lock_irq(&ircomm->hb_spinlock); for (self = (struct ircomm_cb *) hashbin_get_first(ircomm); self != NULL; self = (struct ircomm_cb *) hashbin_get_next(ircomm)) { if (off++ == *pos) break; } return self; }

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stephen hemmingerstephen hemminger4355.13%125.00%
pre-gitpre-git2734.62%125.00%
jean tourrilhesjean tourrilhes78.97%125.00%
david s. millerdavid s. miller11.28%125.00%
Total78100.00%4100.00%


static void *ircomm_seq_next(struct seq_file *seq, void *v, loff_t *pos) { ++*pos; return (void *) hashbin_get_next(ircomm); }

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Total34100.00%1100.00%


static void ircomm_seq_stop(struct seq_file *seq, void *v) { spin_unlock_irq(&ircomm->hb_spinlock); }

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static int ircomm_seq_show(struct seq_file *seq, void *v) { const struct ircomm_cb *self = v; IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EINVAL; ); if(self->line < 0x10) seq_printf(seq, "ircomm%d", self->line); else seq_printf(seq, "irlpt%d", self->line - 0x10); seq_printf(seq, " state: %s, slsap_sel: %#02x, dlsap_sel: %#02x, mode:", ircomm_state[ self->state], self->slsap_sel, self->dlsap_sel); if(self->service_type & IRCOMM_3_WIRE_RAW) seq_printf(seq, " 3-wire-raw"); if(self->service_type & IRCOMM_3_WIRE) seq_printf(seq, " 3-wire"); if(self->service_type & IRCOMM_9_WIRE) seq_printf(seq, " 9-wire"); if(self->service_type & IRCOMM_CENTRONICS) seq_printf(seq, " Centronics"); seq_putc(seq, '\n'); return 0; }

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stephen hemmingerstephen hemminger4428.39%125.00%
pre-gitpre-git63.87%125.00%
jean tourrilhesjean tourrilhes10.65%125.00%
Total155100.00%4100.00%

static const struct seq_operations ircomm_seq_ops = { .start = ircomm_seq_start, .next = ircomm_seq_next, .stop = ircomm_seq_stop, .show = ircomm_seq_show, };
static int ircomm_seq_open(struct inode *inode, struct file *file) { return seq_open(file, &ircomm_seq_ops); }

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stephen hemmingerstephen hemminger2080.00%125.00%
pre-gitpre-git312.00%125.00%
jean tourrilhesjean tourrilhes14.00%125.00%
david s. millerdavid s. miller14.00%125.00%
Total25100.00%4100.00%

#endif /* CONFIG_PROC_FS */ MODULE_AUTHOR("Dag Brattli <dag@brattli.net>"); MODULE_DESCRIPTION("IrCOMM protocol"); MODULE_LICENSE("GPL"); module_init(ircomm_init); module_exit(ircomm_cleanup);

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stephen hemmingerstephen hemminger24613.59%12.94%
linus torvaldslinus torvalds1106.08%38.82%
jean tourrilhesjean tourrilhes764.20%514.71%
kai germaschewskikai germaschewski402.21%12.94%
robie basakrobie basak241.33%12.94%
wang chenwang chen160.88%12.94%
joe perchesjoe perches100.55%25.88%
harvey harrisonharvey harrison90.50%12.94%
andrew mortonandrew morton70.39%12.94%
hideaki yoshifujihideaki yoshifuji40.22%12.94%
tejun heotejun heo30.17%12.94%
david s. millerdavid s. miller30.17%12.94%
jeff garzikjeff garzik20.11%12.94%
adrian bunkadrian bunk20.11%12.94%
panagiotis issaris*panagiotis issaris*10.06%12.94%
arjan van de venarjan van de ven10.06%12.94%
philippe de muyterphilippe de muyter10.06%12.94%
jeff kirsherjeff kirsher10.06%12.94%
hirofumi ogawahirofumi ogawa10.06%12.94%
mathias krausemathias krause10.06%12.94%
Total1810100.00%34100.00%
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