cregit-Linux how code gets into the kernel

Release 4.8 net/irda/irias_object.c

Directory: net/irda
/*********************************************************************
 *
 * Filename:      irias_object.c
 * Version:       0.3
 * Description:   IAS object database and functions
 * Status:        Experimental.
 * Author:        Dag Brattli <dagb@cs.uit.no>
 * Created at:    Thu Oct  1 22:50:04 1998
 * Modified at:   Wed Dec 15 11:23:16 1999
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 *
 *     Copyright (c) 1998-1999 Dag Brattli, All Rights Reserved.
 *
 *     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.
 *
 *     Neither Dag Brattli nor University of Tromsø admit liability nor
 *     provide warranty for any of this software. This material is
 *     provided "AS-IS" and at no charge.
 *
 ********************************************************************/

#include <linux/slab.h>
#include <linux/string.h>
#include <linux/socket.h>
#include <linux/module.h>

#include <net/irda/irda.h>
#include <net/irda/irias_object.h>


hashbin_t *irias_objects;

/*
 *  Used when a missing value needs to be returned
 */

struct ias_value irias_missing = { IAS_MISSING, 0, 0, 0, {0}};


/*
 * Function ias_new_object (name, id)
 *
 *    Create a new IAS object
 *
 */

struct ias_object *irias_new_object( char *name, int id) { struct ias_object *obj; obj = kzalloc(sizeof(struct ias_object), GFP_ATOMIC); if (obj == NULL) { net_warn_ratelimited("%s(), Unable to allocate object!\n", __func__); return NULL; } obj->magic = IAS_OBJECT_MAGIC; obj->name = kstrndup(name, IAS_MAX_CLASSNAME, GFP_ATOMIC); if (!obj->name) { net_warn_ratelimited("%s(), Unable to allocate name!\n", __func__); kfree(obj); return NULL; } obj->id = id; /* Locking notes : the attrib spinlock has lower precendence * than the objects spinlock. Never grap the objects spinlock * while holding any attrib spinlock (risk of deadlock). Jean II */ obj->attribs = hashbin_new(HB_LOCK); if (obj->attribs == NULL) { net_warn_ratelimited("%s(), Unable to allocate attribs!\n", __func__); kfree(obj->name); kfree(obj); return NULL; } return obj; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git7652.78%110.00%
akinobu mitaakinobu mita2920.14%110.00%
jean tourrilhesjean tourrilhes2718.75%330.00%
jeremy fitzhardingejeremy fitzhardinge32.08%110.00%
harvey harrisonharvey harrison32.08%110.00%
joe perchesjoe perches32.08%110.00%
linus torvaldslinus torvalds21.39%110.00%
panagiotis issaris*panagiotis issaris*10.69%110.00%
Total144100.00%10100.00%

EXPORT_SYMBOL(irias_new_object); /* * Function irias_delete_attrib (attrib) * * Delete given attribute and deallocate all its memory * */
static void __irias_delete_attrib(struct ias_attrib *attrib) { IRDA_ASSERT(attrib != NULL, return;); IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, return;); kfree(attrib->name); irias_delete_value(attrib->value); attrib->magic = ~IAS_ATTRIB_MAGIC; kfree(attrib); }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git4894.12%133.33%
jean tourrilhesjean tourrilhes23.92%133.33%
adrian bunkadrian bunk11.96%133.33%
Total51100.00%3100.00%


void __irias_delete_object(struct ias_object *obj) { IRDA_ASSERT(obj != NULL, return;); IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;); kfree(obj->name); hashbin_delete(obj->attribs, (FREE_FUNC) __irias_delete_attrib); obj->magic = ~IAS_OBJECT_MAGIC; kfree(obj); }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git5396.36%150.00%
jean tourrilhesjean tourrilhes23.64%150.00%
Total55100.00%2100.00%

/* * Function irias_delete_object (obj) * * Remove object from hashbin and deallocate all attributes associated with * with this object and the object itself * */
int irias_delete_object(struct ias_object *obj) { struct ias_object *node; IRDA_ASSERT(obj != NULL, return -1;); IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -1;); /* Remove from list */ node = hashbin_remove_this(irias_objects, (irda_queue_t *) obj); if (!node) pr_debug("%s(), object already removed!\n", __func__); /* Destroy */ __irias_delete_object(obj); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git5073.53%225.00%
jean tourrilhesjean tourrilhes1522.06%337.50%
rusty russellrusty russell11.47%112.50%
joe perchesjoe perches11.47%112.50%
harvey harrisonharvey harrison11.47%112.50%
Total68100.00%8100.00%

EXPORT_SYMBOL(irias_delete_object); /* * Function irias_delete_attrib (obj) * * Remove attribute from hashbin and, if it was the last attribute of * the object, remove the object as well. * */
int irias_delete_attrib(struct ias_object *obj, struct ias_attrib *attrib, int cleanobject) { struct ias_attrib *node; IRDA_ASSERT(obj != NULL, return -1;); IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -1;); IRDA_ASSERT(attrib != NULL, return -1;); /* Remove attribute from object */ node = hashbin_remove_this(obj->attribs, (irda_queue_t *) attrib); if (!node) return 0; /* Already removed or non-existent */ /* Deallocate attribute */ __irias_delete_attrib(node); /* Check if object has still some attributes, destroy it if none. * At first glance, this look dangerous, as the kernel reference * various IAS objects. However, we only use this function on * user attributes, not kernel attributes, so there is no risk * of deleting a kernel object this way. Jean II */ node = (struct ias_attrib *) hashbin_get_first(obj->attribs); if (cleanobject && !node) irias_delete_object(obj); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git9686.49%120.00%
jean tourrilhesjean tourrilhes1412.61%360.00%
linus torvaldslinus torvalds10.90%120.00%
Total111100.00%5100.00%

/* * Function irias_insert_object (obj) * * Insert an object into the LM-IAS database * */
void irias_insert_object(struct ias_object *obj) { IRDA_ASSERT(obj != NULL, return;); IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;); hashbin_insert(irias_objects, (irda_queue_t *) obj, 0, obj->name); }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git3892.68%250.00%
jean tourrilhesjean tourrilhes24.88%125.00%
rusty russellrusty russell12.44%125.00%
Total41100.00%4100.00%

EXPORT_SYMBOL(irias_insert_object); /* * Function irias_find_object (name) * * Find object with given name * */
struct ias_object *irias_find_object(char *name) { IRDA_ASSERT(name != NULL, return NULL;); /* Unsafe (locking), object might change */ return hashbin_lock_find(irias_objects, 0, name); }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git2586.21%125.00%
jean tourrilhesjean tourrilhes310.34%250.00%
rusty russellrusty russell13.45%125.00%
Total29100.00%4100.00%

EXPORT_SYMBOL(irias_find_object); /* * Function irias_find_attrib (obj, name) * * Find named attribute in object * */
struct ias_attrib *irias_find_attrib(struct ias_object *obj, char *name) { struct ias_attrib *attrib; IRDA_ASSERT(obj != NULL, return NULL;); IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return NULL;); IRDA_ASSERT(name != NULL, return NULL;); attrib = hashbin_lock_find(obj->attribs, 0, name); if (attrib == NULL) return NULL; /* Unsafe (locking), attrib might change */ return attrib; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git6392.65%133.33%
jean tourrilhesjean tourrilhes57.35%266.67%
Total68100.00%3100.00%

/* * Function irias_add_attribute (obj, attrib) * * Add attribute to object * */
static void irias_add_attrib(struct ias_object *obj, struct ias_attrib *attrib, int owner) { IRDA_ASSERT(obj != NULL, return;); IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;); IRDA_ASSERT(attrib != NULL, return;); IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, return;); /* Set if attrib is owned by kernel or user space */ attrib->value->owner = owner; hashbin_insert(obj->attribs, (irda_queue_t *) attrib, 0, attrib->name); }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git7093.33%250.00%
jean tourrilhesjean tourrilhes45.33%125.00%
adrian bunkadrian bunk11.33%125.00%
Total75100.00%4100.00%

/* * Function irias_object_change_attribute (obj_name, attrib_name, new_value) * * Change the value of an objects attribute. * */
int irias_object_change_attribute(char *obj_name, char *attrib_name, struct ias_value *new_value) { struct ias_object *obj; struct ias_attrib *attrib; unsigned long flags; /* Find object */ obj = hashbin_lock_find(irias_objects, 0, obj_name); if (obj == NULL) { net_warn_ratelimited("%s: Unable to find object: %s\n", __func__, obj_name); return -1; } /* Slightly unsafe (obj might get removed under us) */ spin_lock_irqsave(&obj->attribs->hb_spinlock, flags); /* Find attribute */ attrib = hashbin_find(obj->attribs, 0, attrib_name); if (attrib == NULL) { net_warn_ratelimited("%s: Unable to find attribute: %s\n", __func__, attrib_name); spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags); return -1; } if ( attrib->value->type != new_value->type) { pr_debug("%s(), changing value type not allowed!\n", __func__); spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags); return -1; } /* Delete old value */ irias_delete_value(attrib->value); /* Insert new value */ attrib->value = new_value; /* Success */ spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git12665.28%112.50%
jean tourrilhesjean tourrilhes5629.02%225.00%
martin daleckimartin dalecki42.07%112.50%
joe perchesjoe perches31.55%225.00%
harvey harrisonharvey harrison31.55%112.50%
rusty russellrusty russell10.52%112.50%
Total193100.00%8100.00%

EXPORT_SYMBOL(irias_object_change_attribute); /* * Function irias_object_add_integer_attrib (obj, name, value) * * Add an integer attribute to an LM-IAS object * */
void irias_add_integer_attrib(struct ias_object *obj, char *name, int value, int owner) { struct ias_attrib *attrib; IRDA_ASSERT(obj != NULL, return;); IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;); IRDA_ASSERT(name != NULL, return;); attrib = kzalloc(sizeof(struct ias_attrib), GFP_ATOMIC); if (attrib == NULL) { net_warn_ratelimited("%s: Unable to allocate attribute!\n", __func__); return; } attrib->magic = IAS_ATTRIB_MAGIC; attrib->name = kstrndup(name, IAS_MAX_ATTRIBNAME, GFP_ATOMIC); /* Insert value */ attrib->value = irias_new_integer_value(value); if (!attrib->name || !attrib->value) { net_warn_ratelimited("%s: Unable to allocate attribute!\n", __func__); if (attrib->value) irias_delete_value(attrib->value); kfree(attrib->name); kfree(attrib); return; } irias_add_attrib(obj, attrib, owner); }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git10062.50%220.00%
akinobu mitaakinobu mita4528.12%110.00%
jeremy fitzhardingejeremy fitzhardinge31.88%110.00%
jean tourrilhesjean tourrilhes31.88%110.00%
martin daleckimartin dalecki21.25%110.00%
linus torvaldslinus torvalds21.25%110.00%
harvey harrisonharvey harrison21.25%110.00%
joe perchesjoe perches21.25%110.00%
panagiotis issaris*panagiotis issaris*10.62%110.00%
Total160100.00%10100.00%

EXPORT_SYMBOL(irias_add_integer_attrib); /* * Function irias_add_octseq_attrib (obj, name, octet_seq, len) * * Add a octet sequence attribute to an LM-IAS object * */
void irias_add_octseq_attrib(struct ias_object *obj, char *name, __u8 *octets, int len, int owner) { struct ias_attrib *attrib; IRDA_ASSERT(obj != NULL, return;); IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;); IRDA_ASSERT(name != NULL, return;); IRDA_ASSERT(octets != NULL, return;); attrib = kzalloc(sizeof(struct ias_attrib), GFP_ATOMIC); if (attrib == NULL) { net_warn_ratelimited("%s: Unable to allocate attribute!\n", __func__); return; } attrib->magic = IAS_ATTRIB_MAGIC; attrib->name = kstrndup(name, IAS_MAX_ATTRIBNAME, GFP_ATOMIC); attrib->value = irias_new_octseq_value( octets, len); if (!attrib->name || !attrib->value) { net_warn_ratelimited("%s: Unable to allocate attribute!\n", __func__); if (attrib->value) irias_delete_value(attrib->value); kfree(attrib->name); kfree(attrib); return; } irias_add_attrib(obj, attrib, owner); }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git11164.53%220.00%
akinobu mitaakinobu mita4526.16%110.00%
jean tourrilhesjean tourrilhes42.33%110.00%
jeremy fitzhardingejeremy fitzhardinge31.74%110.00%
martin daleckimartin dalecki21.16%110.00%
linus torvaldslinus torvalds21.16%110.00%
joe perchesjoe perches21.16%110.00%
harvey harrisonharvey harrison21.16%110.00%
panagiotis issaris*panagiotis issaris*10.58%110.00%
Total172100.00%10100.00%

EXPORT_SYMBOL(irias_add_octseq_attrib); /* * Function irias_object_add_string_attrib (obj, string) * * Add a string attribute to an LM-IAS object * */
void irias_add_string_attrib(struct ias_object *obj, char *name, char *value, int owner) { struct ias_attrib *attrib; IRDA_ASSERT(obj != NULL, return;); IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;); IRDA_ASSERT(name != NULL, return;); IRDA_ASSERT(value != NULL, return;); attrib = kzalloc(sizeof( struct ias_attrib), GFP_ATOMIC); if (attrib == NULL) { net_warn_ratelimited("%s: Unable to allocate attribute!\n", __func__); return; } attrib->magic = IAS_ATTRIB_MAGIC; attrib->name = kstrndup(name, IAS_MAX_ATTRIBNAME, GFP_ATOMIC); attrib->value = irias_new_string_value(value); if (!attrib->name || !attrib->value) { net_warn_ratelimited("%s: Unable to allocate attribute!\n", __func__); if (attrib->value) irias_delete_value(attrib->value); kfree(attrib->name); kfree(attrib); return; } irias_add_attrib(obj, attrib, owner); }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git10663.47%220.00%
akinobu mitaakinobu mita4526.95%110.00%
jean tourrilhesjean tourrilhes42.40%110.00%
jeremy fitzhardingejeremy fitzhardinge31.80%110.00%
martin daleckimartin dalecki21.20%110.00%
harvey harrisonharvey harrison21.20%110.00%
joe perchesjoe perches21.20%110.00%
linus torvaldslinus torvalds21.20%110.00%
panagiotis issaris*panagiotis issaris*10.60%110.00%
Total167100.00%10100.00%

EXPORT_SYMBOL(irias_add_string_attrib); /* * Function irias_new_integer_value (integer) * * Create new IAS integer value * */
struct ias_value *irias_new_integer_value(int integer) { struct ias_value *value; value = kzalloc(sizeof(struct ias_value), GFP_ATOMIC); if (value == NULL) return NULL; value->type = IAS_INTEGER; value->len = 4; value->t.integer = integer; return value; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git5998.33%150.00%
panagiotis issaris*panagiotis issaris*11.67%150.00%
Total60100.00%2100.00%

EXPORT_SYMBOL(irias_new_integer_value); /* * Function irias_new_string_value (string) * * Create new IAS string value * * Per IrLMP 1.1, 4.3.3.2, strings are up to 256 chars - Jean II */
struct ias_value *irias_new_string_value(char *string) { struct ias_value *value; value = kzalloc(sizeof(struct ias_value), GFP_ATOMIC); if (value == NULL) return NULL; value->type = IAS_STRING; value->charset = CS_ASCII; value->t.string = kstrndup(string, IAS_MAX_STRING, GFP_ATOMIC); if (!value->t.string) { net_warn_ratelimited("%s: Unable to kmalloc!\n", __func__); kfree(value); return NULL; } value->len = strlen(value->t.string); return value; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git6661.68%114.29%
akinobu mitaakinobu mita2422.43%114.29%
linus torvaldslinus torvalds1110.28%114.29%
jeremy fitzhardingejeremy fitzhardinge32.80%114.29%
harvey harrisonharvey harrison10.93%114.29%
joe perchesjoe perches10.93%114.29%
panagiotis issaris*panagiotis issaris*10.93%114.29%
Total107100.00%7100.00%

/* * Function irias_new_octseq_value (octets, len) * * Create new IAS octet-sequence value * * Per IrLMP 1.1, 4.3.3.2, octet-sequence are up to 1024 bytes - Jean II */
struct ias_value *irias_new_octseq_value(__u8 *octseq , int len) { struct ias_value *value; value = kzalloc(sizeof(struct ias_value), GFP_ATOMIC); if (value == NULL) return NULL; value->type = IAS_OCT_SEQ; /* Check length */ if(len > IAS_MAX_OCTET_STRING) len = IAS_MAX_OCTET_STRING; value->len = len; value->t.oct_seq = kmemdup(octseq, len, GFP_ATOMIC); if (value->t.oct_seq == NULL){ net_warn_ratelimited("%s: Unable to kmalloc!\n", __func__); kfree(value); return NULL; } return value; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git8577.98%114.29%
linus torvaldslinus torvalds1614.68%114.29%
arnaldo carvalho de meloarnaldo carvalho de melo32.75%114.29%
martin daleckimartin dalecki21.83%114.29%
panagiotis issaris*panagiotis issaris*10.92%114.29%
harvey harrisonharvey harrison10.92%114.29%
joe perchesjoe perches10.92%114.29%
Total109100.00%7100.00%


struct ias_value *irias_new_missing_value(void) { struct ias_value *value; value = kzalloc(sizeof(struct ias_value), GFP_ATOMIC); if (value == NULL) return NULL; value->type = IAS_MISSING; return value; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git4497.78%150.00%
panagiotis issaris*panagiotis issaris*12.22%150.00%
Total45100.00%2100.00%

/* * Function irias_delete_value (value) * * Delete IAS value * */
void irias_delete_value(struct ias_value *value) { IRDA_ASSERT(value != NULL, return;); switch (value->type) { case IAS_INTEGER: /* Fallthrough */ case IAS_MISSING: /* No need to deallocate */ break; case IAS_STRING: /* Deallocate string */ kfree(value->t.string); break; case IAS_OCT_SEQ: /* Deallocate byte stream */ kfree(value->t.oct_seq); break; default: pr_debug("%s(), Unknown value type!\n", __func__); break; } kfree(value); }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git6990.79%116.67%
jean tourrilhesjean tourrilhes33.95%233.33%
jesper juhljesper juhl22.63%116.67%
joe perchesjoe perches11.32%116.67%
harvey harrisonharvey harrison11.32%116.67%
Total76100.00%6100.00%

EXPORT_SYMBOL(irias_delete_value);

Overall Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git132772.16%517.24%
akinobu mitaakinobu mita18810.22%13.45%
jean tourrilhesjean tourrilhes1447.83%620.69%
stephen hemmingerstephen hemminger542.94%13.45%
linus torvaldslinus torvalds422.28%310.34%
joe perchesjoe perches160.87%26.90%
harvey harrisonharvey harrison160.87%13.45%
jeremy fitzhardingejeremy fitzhardinge150.82%13.45%
martin daleckimartin dalecki120.65%13.45%
panagiotis issaris*panagiotis issaris*80.44%13.45%
rusty russellrusty russell50.27%13.45%
arnaldo carvalho de meloarnaldo carvalho de melo30.16%13.45%
tejun heotejun heo30.16%13.45%
adrian bunkadrian bunk20.11%13.45%
jesper juhljesper juhl20.11%13.45%
steven colesteven cole10.05%13.45%
jan engelhardtjan engelhardt10.05%13.45%
Total1839100.00%29100.00%
Directory: net/irda
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