cregit-Linux how code gets into the kernel

Release 4.7 drivers/isdn/capi/capilib.c

#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/isdn/capilli.h>


#define DBG(format, arg...) do {                                    \
                printk(KERN_DEBUG "%s: " format "\n" , __func__ , ## arg); \
        } while (0)


struct capilib_msgidqueue {
	
struct capilib_msgidqueue *next;
	
u16 msgid;
};


struct capilib_ncci {
	
struct list_head list;
	
u16 applid;
	
u32 ncci;
	
u32 winsize;
	
int   nmsg;
	
struct capilib_msgidqueue *msgidqueue;
	
struct capilib_msgidqueue *msgidlast;
	
struct capilib_msgidqueue *msgidfree;
	
struct capilib_msgidqueue msgidpool[CAPI_MAXDATAWINDOW];
};

// ---------------------------------------------------------------------------
// NCCI Handling


static inline void mq_init(struct capilib_ncci *np) { u_int i; np->msgidqueue = NULL; np->msgidlast = NULL; np->nmsg = 0; memset(np->msgidpool, 0, sizeof(np->msgidpool)); np->msgidfree = &np->msgidpool[0]; for (i = 1; i < np->winsize; i++) { np->msgidpool[i].next = np->msgidfree; np->msgidfree = &np->msgidpool[i]; } }

Contributors

PersonTokensPropCommitsCommitProp
kai germaschewskikai germaschewski10097.09%133.33%
al viroal viro21.94%133.33%
karsten keilkarsten keil10.97%133.33%
Total103100.00%3100.00%


static inline int mq_enqueue(struct capilib_ncci *np, u16 msgid) { struct capilib_msgidqueue *mq; if ((mq = np->msgidfree) == NULL) return 0; np->msgidfree = mq->next; mq->msgid = msgid; mq->next = NULL; if (np->msgidlast) np->msgidlast->next = mq; np->msgidlast = mq; if (!np->msgidqueue) np->msgidqueue = mq; np->nmsg++; return 1; }

Contributors

PersonTokensPropCommitsCommitProp
kai germaschewskikai germaschewski9497.92%133.33%
harvey harrisonharvey harrison11.04%133.33%
al viroal viro11.04%133.33%
Total96100.00%3100.00%


static inline int mq_dequeue(struct capilib_ncci *np, u16 msgid) { struct capilib_msgidqueue **pp; for (pp = &np->msgidqueue; *pp; pp = &(*pp)->next) { if ((*pp)->msgid == msgid) { struct capilib_msgidqueue *mq = *pp; *pp = mq->next; if (mq == np->msgidlast) np->msgidlast = NULL; mq->next = np->msgidfree; np->msgidfree = mq; np->nmsg--; return 1; } } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
kai germaschewskikai germaschewski11199.11%150.00%
al viroal viro10.89%150.00%
Total112100.00%2100.00%


void capilib_new_ncci(struct list_head *head, u16 applid, u32 ncci, u32 winsize) { struct capilib_ncci *np; np = kmalloc(sizeof(*np), GFP_ATOMIC); if (!np) { printk(KERN_WARNING "capilib_new_ncci: no memory.\n"); return; } if (winsize > CAPI_MAXDATAWINDOW) { printk(KERN_ERR "capi_new_ncci: winsize %d too big\n", winsize); winsize = CAPI_MAXDATAWINDOW; } np->applid = applid; np->ncci = ncci; np->winsize = winsize; mq_init(np); list_add_tail(&np->list, head); DBG("kcapi: appl %d ncci 0x%x up", applid, ncci); }

Contributors

PersonTokensPropCommitsCommitProp
kai germaschewskikai germaschewski113100.00%1100.00%
Total113100.00%1100.00%

EXPORT_SYMBOL(capilib_new_ncci);
void capilib_free_ncci(struct list_head *head, u16 applid, u32 ncci) { struct list_head *l; struct capilib_ncci *np; list_for_each(l, head) { np = list_entry(l, struct capilib_ncci, list); if (np->applid != applid) continue; if (np->ncci != ncci) continue; printk(KERN_INFO "kcapi: appl %d ncci 0x%x down\n", applid, ncci); list_del(&np->list); kfree(np); return; } printk(KERN_ERR "capilib_free_ncci: ncci 0x%x not found\n", ncci); }

Contributors

PersonTokensPropCommitsCommitProp
kai germaschewskikai germaschewski96100.00%1100.00%
Total96100.00%1100.00%

EXPORT_SYMBOL(capilib_free_ncci);
void capilib_release_appl(struct list_head *head, u16 applid) { struct list_head *l, *n; struct capilib_ncci *np; list_for_each_safe(l, n, head) { np = list_entry(l, struct capilib_ncci, list); if (np->applid != applid) continue; printk(KERN_INFO "kcapi: appl %d ncci 0x%x forced down\n", applid, np->ncci); list_del(&np->list); kfree(np); } }

Contributors

PersonTokensPropCommitsCommitProp
kai germaschewskikai germaschewski82100.00%1100.00%
Total82100.00%1100.00%

EXPORT_SYMBOL(capilib_release_appl);
void capilib_release(struct list_head *head) { struct list_head *l, *n; struct capilib_ncci *np; list_for_each_safe(l, n, head) { np = list_entry(l, struct capilib_ncci, list); printk(KERN_INFO "kcapi: appl %d ncci 0x%x forced down\n", np->applid, np->ncci); list_del(&np->list); kfree(np); } }

Contributors

PersonTokensPropCommitsCommitProp
kai germaschewskikai germaschewski72100.00%1100.00%
Total72100.00%1100.00%

EXPORT_SYMBOL(capilib_release);
u16 capilib_data_b3_req(struct list_head *head, u16 applid, u32 ncci, u16 msgid) { struct list_head *l; struct capilib_ncci *np; list_for_each(l, head) { np = list_entry(l, struct capilib_ncci, list); if (np->applid != applid) continue; if (np->ncci != ncci) continue; if (mq_enqueue(np, msgid) == 0) return CAPI_SENDQUEUEFULL; return CAPI_NOERROR; } printk(KERN_ERR "capilib_data_b3_req: ncci 0x%x not found\n", ncci); return CAPI_NOERROR; }

Contributors

PersonTokensPropCommitsCommitProp
kai germaschewskikai germaschewski95100.00%1100.00%
Total95100.00%1100.00%

EXPORT_SYMBOL(capilib_data_b3_req);
void capilib_data_b3_conf(struct list_head *head, u16 applid, u32 ncci, u16 msgid) { struct list_head *l; struct capilib_ncci *np; list_for_each(l, head) { np = list_entry(l, struct capilib_ncci, list); if (np->applid != applid) continue; if (np->ncci != ncci) continue; if (mq_dequeue(np, msgid) == 0) { printk(KERN_ERR "kcapi: msgid %hu ncci 0x%x not on queue\n", msgid, ncci); } return; } printk(KERN_ERR "capilib_data_b3_conf: ncci 0x%x not found\n", ncci); }

Contributors

PersonTokensPropCommitsCommitProp
kai germaschewskikai germaschewski99100.00%1100.00%
Total99100.00%1100.00%

EXPORT_SYMBOL(capilib_data_b3_conf);

Overall Contributors

PersonTokensPropCommitsCommitProp
kai germaschewskikai germaschewski96898.98%116.67%
al viroal viro40.41%116.67%
tejun heotejun heo30.31%116.67%
harvey harrisonharvey harrison10.10%116.67%
karsten keilkarsten keil10.10%116.67%
joe perchesjoe perches10.10%116.67%
Total978100.00%6100.00%
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