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/****************************************************************************
* *
* FILE NAME VERSION *
* mai_fcmp.c MAPI 0.05 *
* *
* DESCRIPTION *
* This file contains all the routines that understand the semantic *
* content of filters. These are only used by other management API *
* functions and are not exported. *
* *
* *
* DATA STRUCTURES *
* None *
* *
* FUNCTIONS *
* maif_init Filter management initialization *
* maif_match Compare MAD and filter; signal match*
* maif_reduce Compare 2 filters and signal match *
* maif_special Extracts filter from 'special' MAD *
* maif_make_special Create 'special' MAD from filter *
* *
* DEPENDENCIES *
* ib_types.h Include file *
* *
* *
* HISTORY *
* NAME DATE REMARKS *
* Jim Mott 01/15/01 Entry from prototype code *
* jsy 02/14/01 Fix compiler warnings *
* *
* OUTSTANDING ISSUES *
* 1. Must fill in the 'real' filter logic here *
* *
****************************************************************************/
#include "mai_l.h" /* Local mai function definitions */
#if 0
/*
* filter_test
* This utility routine will compare the mask/value pair from one filter
* with the same stuff on another filter. At a high level the objective
* is to see if the new filter (p1/p2) just added as a consuming filter
* can 'consume' any (or all) of the MADs that somebody with a different
* filter registered could get.
*
* The only place where you might not eat somebody elses MADs is where
* the masks are equal, and the values are different.
*
* INPUTS
* size The number of bytes to compare
* p1 Filter 1 value
* p2 Filter 1 mask
* p3 Filter 2 value
* p4 Filter 2 mask
*
* It returns:
* 0 value1/mask1 is not a match with value2/mask2
* 1 They do match
*
* TODO:
* 1. Implement logic
*/
static int
filter_test(int size, void *p1, void *p2, void *p3, void *p4)
{
uint8_t p1_8,
p2_8,
p3_8,
p4_8;
uint16_t p1_16,
p2_16,
p3_16,
p4_16;
uint32_t p1_32,
p2_32,
p3_32,
p4_32;
uint32_t *p1p,
*p2p,
*p3p,
*p4p;
int rc;
IB_ENTER(__func__, size, p1, p2, p3);
rc = 1; /* Assume a match is possible */
switch (size)
{
case 1:
p1_8 = *(uint8_t *) p1;
p2_8 = *(uint8_t *) p2;
p3_8 = *(uint8_t *) p3;
p4_8 = *(uint8_t *) p4;
p2_8 = (p2_8 & p4_8); /* See if any bits in common */
if (p2_8 == 0) /* If no mask bits in common */
break; /* they might overlap */
p1_8 = p1_8 & p2_8; /* Calculate value under mask */
p3_8 = p3_8 & p2_8; /* and value2 under mask */
if (p1_8 == p3_8) /* If masked section identical */
break; /* they might overlap */
rc = 0;
break;
case 2:
p1_16 = *(uint16_t *) p1;
p2_16 = *(uint16_t *) p2;
p3_16 = *(uint16_t *) p3;
p4_16 = *(uint16_t *) p4;
p2_16 = p2_16 & p4_16;
if (p2_16 == 0)
break;
p1_16 = p1_16 & p2_16;
p3_16 = p3_16 & p2_16;
if (p1_16 == p3_16)
break;
rc = 0;
break;
case 4:
p1_32 = *(uint32_t *) p1;
p2_32 = *(uint32_t *) p2;
p3_32 = *(uint32_t *) p3;
p4_32 = *(uint32_t *) p4;
p2_32 = p2_32 & p4_32;
if (p2_32 == 0)
break;
p1_32 = p1_32 & p2_32;
p3_32 = p3_32 & p2_32;
if (p1_32 == p3_32)
break;
rc = 0;
break;
case 8:
p1p = (uint32_t *) p1;
p2p = (uint32_t *) p2;
p3p = (uint32_t *) p3;
p4p = (uint32_t *) p4;
p2p[0] = p2p[0] & p4p[0];
p2p[1] = p2p[1] & p4p[1];
if ((p2p[0] == 0) && (p2p[1] == 0))
break;
p1p[0] = p1p[0] & p2p[0];
p1p[1] = p1p[1] & p2p[1];
p3p[0] = p3p[0] & p2p[0];
p3p[1] = p3p[1] & p2p[1];
if ((p1p[0] == p3p[0]) && (p1p[1] == p3p[1]))
break;
rc = 0;
break;
default:
IB_FATAL_ERROR("filter_test: Invalid size parameter");
/*
* NEVER RETURNS
*/
}
/*
* Done with the easy stuff
*/
IB_EXIT(__func__, rc);
return (rc);
}
#define FILT_TEST(p1) filter_test(sizeof(filt1->value.p1), \
(void *)&filt1->value.p1, \
(void *)&filt1->mask.p1, \
(void *)&filt2->value.p1, \
(void *)&filt2->mask.p1)
/*
* mad_test
* This utility routine will compare the mask value passed with the
* compare value passed against the target value passed and return a
* value indicating what happened. The logic for this is:
*
* if p1 is 0:
* RC = (p2 == 0) ? 0 : 1
*
* if p1 is non-0:
* RC = (((p1 & p2) ^ p3) == 0) ? 1 : 0
*
* Where p1 is the mask, p2 is the compare value, and p3 is the target
* to compare with.
*
* In English:
* If you set the mask field to 0, then the value field is used to
* decide if you want to ignore this field for purposes of a filter
* match (value=0), or if you want to match any value in this field
* (value != 0).
* If the mask field is non-zero, then we and the mask with the target
* to compare with, and compare the result with the value passed.
*
* It returns:
* 0 No match
* 1 Match
*
*/
static int
mad_test(int size, void *p1, void *p2, void *p3)
{
uint8_t p1_8,
p2_8,
p3_8;
uint16_t p1_16,
p2_16,
p3_16;
uint32_t p1_32,
p2_32,
p3_32;
uint32_t *p1p,
*p2p,
*p3p;
int rc;
IB_ENTER(__func__, size, p1, p2, p3);
/*
* Cast everybody and get ready to go
*/
rc = 0; /* Start assuming no match */
switch (size)
{
case 1:
p1_8 = *(uint8_t *) p1;
p2_8 = *(uint8_t *) p2;
p3_8 = *(uint8_t *) p3;
if (!p1_8)
{
if (p2_8 != 0)
rc = 1;
break;
}
if ((p1_8 & p3_8) == p2_8)
rc = 1;
break;
case 2:
p1_16 = *(uint16_t *) p1;
p2_16 = *(uint16_t *) p2;
p3_16 = *(uint16_t *) p3;
if (!p1_16)
{
if (p2_16 != 0)
rc = 1;
break;
}
if ((p1_16 & p3_16) == p2_16)
rc = 1;
break;
case 4:
p1_32 = *(uint32_t *) p1;
p2_32 = *(uint32_t *) p2;
p3_32 = *(uint32_t *) p3;
if (!p1_32)
{
if (p2_32 != 0)
rc = 1;
break;
}
if ((p1_32 & p3_32) == p2_32)
rc = 1;
break;
case 8:
p1p = (uint32_t *) p1;
p2p = (uint32_t *) p2;
p3p = (uint32_t *) p3;
if ((p1p[0] == 0) && (p1p[1] == 0))
{
if ((p2p[0] != 0) || (p2p[1] != 0))
rc = 1;
break;
}
p1_32 = p1p[0] & p3p[0];
p2_32 = p1p[1] & p3p[1];
if ((p1_32 == p2p[0]) && (p2_32 == p2p[1]))
rc = 1;
break;
default:
IB_FATAL_ERROR("mad_test: Invalid size parameter");
/*
* NEVER RETURNS
*/
}
/*
* Done with the easy stuff
*/
IB_EXIT(__func__, rc);
return (rc);
}
#define MAD_TEST(p1) mad_test(sizeof(mad2->p1), \
(void *)&mad2->p1, \
(void *)&mad1->p1, \
(void *)&mad3->p1)
#endif
/*
* Functions used to dump the contents of filters.
*/
#if defined(VIEO_DEBUG) || defined(DEBUG)
static char pbuff[32];
static char *
ptype(int p)
{
if (p == MAI_FILTER_ANY)
{
sprintf(pbuff, "ANY");
}
else
{
sprintf(pbuff, "%d", p);
}
return pbuff;
}
void
dump_maibase_info(Mai_t *info)
{
char data[4096];
char *ptr;
if (! IB_LOG_IS_INTERESTED(VS_LOG_INFO))
return;
ptr = data;
ptr +=
sprintf(ptr,
"\n\t\t\t ********* MAI BASE INFO ****************\n\n");
ptr +=
sprintf(ptr,
"\t\t\t AID: 0x%04x\n",info->base.aid);
ptr +=
sprintf(ptr,
"\t\t\t AMOD: 0x%04x\n",(unsigned)info->base.amod);
ptr +=
sprintf(ptr,
"\t\t\t BVERSION: 0x%02x\n",info->base.bversion);
ptr +=
sprintf(ptr,
"\t\t\t CVERSION: 0x%02x\n",info->base.cversion);
ptr +=
sprintf(ptr,
"\t\t\t HOP COUNT: 0x%02x\n",info->base.hopCount);
ptr +=
sprintf(ptr,
"\t\t\t HOP PTR: 0x%02x\n",info->base.hopPointer);
ptr +=
sprintf(ptr,
"\t\t\t MCLASS: %d\n",info->base.mclass);
ptr +=
sprintf(ptr,
"\t\t\t METHOD: 0x%02x\n",info->base.method);
ptr +=
sprintf(ptr,
"\t\t\t STATUS: 0x%04x\n",info->base.status);
ptr +=
sprintf(ptr,
"\t\t\t TID: 0x%"CS64"x\n",info->base.tid);
IB_LOG_INFO0(Log_StrDup(data));
}
void
dump_maifilter_info(int i, Filter_t * ft)
{
char buff[MAI_FNAME_LEN];
char data[4096];
char *ptr;
if (! IB_LOG_IS_INTERESTED(VS_LOG_INFO))
return;
ptr = data;
ptr +=
sprintf(ptr,
"\n\t\t\t %d: ********** FILTER INFO *************\n\n",
i);
ptr +=
sprintf(ptr, "\t\t\t Type : Normal\n");
if (ft->active & MAI_ACT_FNAME)
{
int i;
for (i = 0; i < MAI_FNAME_LEN - 1; i++)
buff[i] = ft->fname[i];
buff[i] = 0;
ptr += sprintf(ptr, "\t\t\t Name : %s\n", buff);
}
ptr +=
sprintf(ptr, "\t\t\t Active flag : 0x%x\n", (unsigned)ft->active);
if (ft->active & MAI_ACT_TYPE)
ptr +=
sprintf(ptr, "\t\t\t Ftype : %s\n",
ptype(ft->type));
if (ft->active & MAI_ACT_DEV)
ptr +=
sprintf(ptr, "\t\t\t Device : %s\n",
ptype(ft->dev));
if (ft->active & MAI_ACT_PORT)
ptr +=
sprintf(ptr, "\t\t\t Port : %s\n",
ptype(ft->port));
if (ft->active & MAI_ACT_QP)
ptr +=
sprintf(ptr, "\t\t\t QP : %s\n",
ptype(ft->qp));
if (ft->active & MAI_ACT_FMASK)
{
Mad_t *md;
int i;
for (i = 0; i < 2; i++)
{
char *set;
// ptr += sprintf(ptr,"\n");
if (i == 0)
{
md = &ft->value;
ptr +=
sprintf(ptr,
"\t\t\t _________ Value MAD _______\n");
set = ptr;
}
else
{
md = &ft->mask;
ptr +=
sprintf(ptr,
"\t\t\t _________ MASK MAD ________\n");
set = ptr;
}
if (md->bversion)
ptr +=
sprintf(ptr,
"\t\t\t Version : 0x%02x\n",
md->bversion);
if (md->mclass)
ptr +=
sprintf(ptr,
"\t\t\t Mclass : 0x%02x\n",
md->mclass);
if (md->method)
ptr +=
sprintf(ptr,
"\t\t\t Method : 0x%02x\n",
md->method);
if (md->status)
ptr +=
sprintf(ptr,
"\t\t\t Status : 0x%04x\n",
md->status);
if (md->hopPointer)
ptr +=
sprintf(ptr,
"\t\t\t HopPointer : 0x%02x\n",
md->hopPointer);
if (md->hopCount)
ptr +=
sprintf(ptr,
"\t\t\t HopCount : 0x%02x\n",
md->hopCount);
if (md->tid)
ptr +=
sprintf(ptr,
"\t\t\t TID : 0x%"CS64"x\n",
md->tid);
if (md->aid)
ptr +=
sprintf(ptr,
"\t\t\t AID : 0x%04x\n",
md->aid);
if (md->rsvd3)
ptr +=
sprintf(ptr,
"\t\t\t Revd3 : 0x%04x\n",
md->rsvd3);
if (md->rsvd3)
ptr +=
sprintf(ptr,
"\t\t\t AMOD : 0x%08x\n",
(unsigned)md->amod);
if (set == ptr)
{
ptr +=
sprintf(ptr,
"\t\t\t ALL VALUES : 0x%08x\n",
0);
}
}
}
IB_LOG_INFO0(Log_StrDup(data));
}
#define DUMP_FILTER(ft,i) dump_maifilter_info(i,ft)
#define DUMP_MAI_BASEINFO(info) dump_maibase_info(info)
#else
#define DUMP_FILTER(ft,i)
#define DUMP_MAI_BASEINFO(info)
#endif
/*
* mai_validate_filter
* This routine will look at a Fiter_t and decide if it is valid or
* just junk. It returns:
* 0 if the thing is not valid
* 1 if it is valid
*/
int
mai_validate_filter(Filter_t * filter)
{
int rc;
uint32_t mask;
IB_ENTER(__func__, filter, 0, 0, 0);
/*
* Assume this filter is valid
*/
rc = 1; /* For now, it must be valid */
/*
* Validate the type field if they say it is active
*/
mask = MAI_ACT_TYPE | MAI_ACT_DEV | MAI_ACT_PORT |
MAI_ACT_QP | MAI_ACT_FMASK;
/*
* mask ^= 0xFFFFFFFF; Turn off the only valid bits
*/
if ((mask & filter->active) == 0)
{
IB_LOG_ERRORX("Invalid mask:", filter->active);
IB_EXIT(__func__, 0);
return (0);
}
/*
* If they are looking for a specific type, make sure it is valid
*/
if (filter->active & MAI_ACT_TYPE)
{
switch (filter->type)
{
case MAI_TYPE_EXTERNAL:
case MAI_TYPE_INTERNAL:
case MAI_TYPE_ERROR:
break; /* Anybody can use these filters */
case MAI_TYPE_ANY:
break;
default:
IB_LOG_ERROR("Invalid type:", filter->type);
IB_EXIT(__func__, 0);
return (0);
}
}
/*
* If they are looking at a specific QP, make sure it is valid
*/
if (filter->active & MAI_ACT_QP)
{
switch (filter->qp)
{
case MAI_FILTER_ANY:
break;
case 0: /* SMI */
break;
case 1: /* GSI */
break;
default:
IB_LOG_ERROR("Invalid QP:", filter->qp);
IB_EXIT(__func__, 0);
return (0);
}
}
/*
* If they are looking at a specific port, make sure it is valid
*/
if (filter->active & MAI_ACT_PORT)
{
switch (filter->port)
{
case MAI_FILTER_ANY:
break;
default:
{
if (filter->port < 0 || filter->port > MAI_MAX_PORT)
{
IB_LOG_ERROR("Invalid PORT:", filter->port);
IB_EXIT(__func__, 0);
return (0);
}
}
}
}
/*
* If they are looking at a specific device, make sure it is valid
*/
if (filter->active & MAI_ACT_DEV)
{
switch (filter->dev)
{
case MAI_FILTER_ANY:
break;
default:
{
if (filter->dev < 0 || filter->dev > MAI_MAX_DEV)
{
IB_LOG_ERROR ("Invalid device:", filter->dev);
IB_EXIT(__func__, 0);
return (0);
}
}
}
}
IB_EXIT(__func__, rc);
return (rc);
}
/*
* maif_init
* Called to initialize internal static data areas.
*/
void
maif_init(void)
{
IB_ENTER(__func__, 0, 0, 0, 0);
IB_EXIT(__func__, 0);
}
/*
* mai_maskequate_filter
* The logic below implements a matching logic that correspond to
* equating the masked values of incoming mad and the filter value mad.
* As the filter spec is refined we will add other options.
* returns:
* 0 MAD is not described by the filter
* 1 MAD is described by the filter
*/
int
maif_maskequate_filter(void *maddp, Filter_t * filter)
{
unsigned int *dp = (unsigned int *) maddp; // pointer to mad
// data to check
unsigned int *mp,
*fp;
int len;
int rc;
IB_ENTER(__func__, maddp, filter, 0, 0);
fp = (unsigned int *) &filter->value;
mp = (unsigned int *) &filter->mask;
len = sizeof(filter->value);
for (; len > 0; len -= sizeof(int))
{
if ((*fp++ ^ *dp++) & *mp++)
{
/*
* failed this filter
*/
IB_EXIT(__func__, 0);
return 0;
}
}
if (len < 0)
{
// (handle filters of arbitrary length, just in case)
uint8_t *cmp = (uint8_t *) mp;
uint8_t *cfp = (uint8_t *) fp;
uint8_t *cdp = (uint8_t *) dp;
len += sizeof(int);
for (; len > 0; len--)
{
if ((*cfp++ ^ *cdp++) & *cmp++)
{
/*
* failed this filter
*/
IB_EXIT(__func__, 0);
return 0;
}
}
}
rc = (len == 0);
IB_EXIT(__func__, rc);
return rc;
}
/*
* maif_match
* This function is called with a pointer to a MAD as received from a
* down stream process and a filter to check against that MAD. It
* returns:
* 0 MAD is not described by the filter
* 1 MAD is described by the filter
*/
int
maif_match(Mai_t * data, Filter_t * filter)
{
int rc,
rc2;
int diff;
IB_ENTER(__func__, data, filter, 0, 0);
/*
* Assume they are not a matching MAD
*/
rc = 0;
rc2 = 0;
diff = 0;
#if 0 // PAW
{
Mad_t *mad1,
*mad2,
*mad3;
/*
* Now start checking specific fields
*/
mad1 = &filter->value;
mad2 = &filter->mask;
mad3 = &data->base;
rc += MAD_TEST(bversion);
rc += MAD_TEST(mclass);
rc += MAD_TEST(cversion);
rc += MAD_TEST(method);
rc += MAD_TEST(status);
rc += MAD_TEST(hopPointer);
rc += MAD_TEST(hopCount);
rc += MAD_TEST(tid);
rc += MAD_TEST(aid);
rc += MAD_TEST(amod);
}
#else
DUMP_FILTER(filter,0) ;
DUMP_MAI_BASEINFO(data);
IB_LOG_VERBOSE_FMT(__func__, "filter dev: %d port: %d qp: %d : act",
filter->dev,filter->port,(int)filter->qp);
IB_LOG_VERBOSE("filter value & mask",filter);
//IB_LOG_DATA("filter value",&filter->value,sizeof(filter->value));
//IB_LOG_DATA("filter mask",&filter->mask,sizeof(filter->mask));
if (filter->active & MAI_ACT_FMASK)
{
rc = maif_maskequate_filter((void *) (&data->base), filter);
if (rc == 0)
{
/*
* match failed .. we are done
*/
IB_EXIT(__func__, rc);
return (rc);
}
}
#endif
rc2 = 1;
/*
* Do they want to match on the type field (EXTERNAL, INTERNAL)
*/
/*
* We treat MAI_TYPE_ERROR specially so that unsuspecting clients
* don't get this special type of MAD. Later we could enhance the
* clients to properly set up their filters to avoid this MAD unless
* truely desired
*/
if (data->type == MAI_TYPE_ERROR)
{
if ((filter->active & MAI_ACT_TYPE)
&& (filter->type == MAI_TYPE_ERROR) )
rc2++;
else
{
diff++;
IB_LOG_VERBOSE("FType differs ",filter->type);
}
}
else if (filter->active & MAI_ACT_TYPE)
{
if ((filter->type == MAI_FILTER_ANY)
|| (filter->type == data->type))
rc2++;
else
{
diff++;
IB_LOG_VERBOSE("FType differs ",filter->type);
}
}
/*
* See if they care which device the data comes from
*/
if (!diff && filter->active & MAI_ACT_DEV)
{
if ((filter->dev == MAI_FILTER_ANY)
|| (filter->dev == data->dev))
rc2++;
else
{
diff++;
IB_LOG_VERBOSE("MAD Dev differs ",data->dev);
}
}
/*
* See if they care which port it comes from
*/
if (!diff && filter->active & MAI_ACT_PORT)
{
if ((filter->port == MAI_FILTER_ANY)
|| (filter->port == data->port))
rc2++;
else
{
diff++;
IB_LOG_VERBOSE("MAD Port differs ",data->port);
}
}
/*
* See if they care which QP it comes from
*/
if (!diff && filter->active & MAI_ACT_QP)
{
if ((filter->qp == MAI_FILTER_ANY) || (filter->qp == data->qp))
rc2++;
else{
diff++;
IB_LOG_VERBOSE("MAD QP differs ",data->qp);
}
}
if (!diff && filter->mai_filter_check_packet)
{
diff += filter->mai_filter_check_packet(data);
}
if (diff)
{
/*
* if any differnce exits in header fail the match
*/
IB_EXIT(__func__, 0);
return (0);
}
/*
* Else we have match
*/
IB_EXIT(__func__, rc2);
return (rc2);
}
/*
* maif_reduce
* Called with pointers to two filters. It compares them and returns
* information on how they compare. Assume parameters Filt1 and Filt2,
* this code returns:
*
* MAI_FILTER_SUBSET - Filt1 is a subset of Filt2
* MAI_FILTER_SUPSET - Filt1 is a superset of Filt2
* MAI_FILTER_DISTINCT- Filt1 has nothing to do with Filt2
* (or at least 1 is not a filter)
* MAI_FILTER_EQUAL - Filt1 is idential to Filt2
*
* TODO:
* 1. Must be updated once filters settle down.
*/
#define FMATCH_TEST(var,mask){ \
if (filt1->active & mask) { \
if (filt1->var == MAI_FILTER_ANY) { \
any++; \
if ((filt2->active & mask)) { \
rc++; \
if (filt2->var != MAI_FILTER_ANY) { \
supset++; \
} \
} else { \
mismatch++; \
} \
} else { \
if ((filt2->active & mask)) { \
if (filt2->var == MAI_FILTER_ANY) { \
rc++; \
subset++; \
} else if (filt1->var == filt2->var) { \
rc++; \
} else { \
mismatch++; \
} \
} else { \
mismatch++; \
} \
} \
} \
}
int
maif_reduce(Filter_t * filt1, Filter_t * filt2)
{
int rc;
int mismatch = 0; /* > 0 if filters are different in
* anyway
*/
int supset; /* > 0 if test filter is subset of
* reference filter */
int subset; /* > 0 if ref filter is subset of test
* filter */
int any;
IB_ENTER(__func__, filt1, filt2, 0, 0);
/*
* Validate the Filter_t structure
*/
rc = mai_validate_filter(filt1);
if (!rc)
{
IB_LOG_ERRORRC("Invalid(1) filter rc:", rc);
IB_EXIT(__func__, 0);
return (0);
}
rc = mai_validate_filter(filt2);
if (!rc)
{
IB_LOG_ERRORRC("Invalid(2) filter rc:", rc);
IB_EXIT(__func__, 0);
return (0);
}
#if 0
DUMP_FILTER(filt1, 1);
DUMP_FILTER(filt2, 2);
#endif
/*
* Strip off and handle the identical case
*/
rc = memcmp(filt1, filt2, sizeof(Filter_t));
if (rc == 0)
{
IB_EXIT(__func__, MAI_FILTER_EQUAL);
return (MAI_FILTER_EQUAL);
}
/*
* Do a comparison of the fields directly
*/
if (filt1->active == filt2->active &&
filt1->type == filt2->type &&
filt1->dev == filt2->dev &&
filt1->port == filt2->port &&
filt1->flags == filt2->flags &&
filt1->qp == filt2->qp &&
!memcmp((void *) (&filt1->value), (void *) (&filt2->value),
sizeof(filt2->value)) &&
!memcmp((void *) (&filt1->mask), (void *) (&filt2->mask),
sizeof(filt2->mask)))
{
IB_EXIT(__func__, MAI_FILTER_EQUAL);
return (MAI_FILTER_EQUAL);
}
/*
* Assume they do not match at all
*/
rc = 0;
#ifdef PAW
/*
* Handle the nasty match logic for mask+value stuff
*/
rc += FILT_TEST(bversion);
rc += FILT_TEST(mclass);
rc += FILT_TEST(cversion);
rc += FILT_TEST(method);
rc += FILT_TEST(status);
rc += FILT_TEST(hopPointer);
rc += FILT_TEST(hopCount);
rc += FILT_TEST(tid);
rc += FILT_TEST(aid);
rc += FILT_TEST(amod);
IB_LOG_INFO("Mask/Value testing rc", rc);
if (rc != 0)
rc = -1;
#endif
/*
* Handle the match any guys
*/
rc = 0;
mismatch = 0;
subset = 0;
supset = 0;
any = 0;
FMATCH_TEST(type, MAI_ACT_TYPE);
FMATCH_TEST(dev, MAI_ACT_DEV);
FMATCH_TEST(port, MAI_ACT_PORT);
FMATCH_TEST(qp, MAI_ACT_QP);
IB_LOG_VERBOSE("Any count", any);
/*
* Some notes: If There is mismatch in the header. The possiblilties
* are - 1. filt2 has some MAI_FILTER_ANY values for values that filt1
* hold as distinct.In this case subset indicates the number of
* incidence of this type (that filt1 value is is a subset of range
* covered by filt2). 2. The inverse of - filt1 has MAI_FILTER_ANY on
* some values that filt2 has set as distinct - supset indicates the
* number incidenct of this type (filt1 value is superset of the value
* covered by filt2).
*/
/*
* Now compare the the values and mask to determine complete
* equivalence
*/
if (mismatch == 0 && rc)
{
/*
* If filt1 does not have an active MAD mask then
* the equivalence is determined solely by above match above
*/
if ((filt1->active & MAI_ACT_FMASK) == 0)
{
if ((filt2->active & MAI_ACT_FMASK))
{
/*
* We have mismatch on the FMASK only.
* The MAD specification ofn filt2 narrows it
* scope further thereby making it subset of filt1.
* We use the subset/supset values determine
* if we should return explicit sets or fuzzy.
*/
if (subset == 0)
{
/*
* filt1 is not covered by any MAI_FILTER_ANY
* in filt2.
*/
IB_LOG_INFO(" Filter SUPSET ", MAI_FILTER_SUPSET);
IB_EXIT(__func__, MAI_FILTER_SUPSET);
return (MAI_FILTER_SUPSET);
}
else
{
/*
* filt2 covers filt1 by an MAI_FILTER_ANY
* but the range of filt2 is contracted by
* the presence of mask,value pair that
* filt1 does not have. So we return
* fuzzy here.
*/
IB_LOG_INFO(" Filter FUZZY ", MAI_FILTER_FUZZY);
IB_EXIT(__func__, MAI_FILTER_FUZZY);
return (MAI_FILTER_FUZZY);
}
}
else
{
/*
* Neither filters have active mask so they are equivalent,
* subject to subset/supset incidents.
*/
fuzzy:
if (subset == 0 && supset == 0)
{
/*
* Filters are equal in every way
*/
IB_LOG_INFO("Filter EQUAL", MAI_FILTER_EQUAL);
IB_EXIT(__func__, MAI_FILTER_EQUAL);
return (MAI_FILTER_EQUAL);
}
else if (subset && supset == 0)
{
/*
* filt1 is a subset of filt2 on some values
*/
IB_LOG_INFO(" Filter SUBSET ", MAI_FILTER_SUBSET);
IB_EXIT(__func__, MAI_FILTER_SUBSET);
return (MAI_FILTER_SUBSET);
}
else if (subset == 0 && supset)
{
/*
* filt1 is a superset of filt2 - it cover wider range on
* some values.
*/
IB_LOG_INFO(" Filter SUPSET ", MAI_FILTER_SUPSET);
IB_EXIT(__func__, MAI_FILTER_SUPSET);
return (MAI_FILTER_SUPSET);
}
else
{
/*
* We have a combination of subset and supsets
* return fuzzy.
*/
IB_LOG_INFO(" Filter FUZZY ", MAI_FILTER_FUZZY);
IB_EXIT(__func__, MAI_FILTER_FUZZY);
return (MAI_FILTER_FUZZY);
}
}
}
else
{
/*
* filt1 does have a MAI_ACT_FMASK.
* See if mask is active on filt2 and check.
*/
if ((filt2->active & MAI_ACT_FMASK) == 0)
{
/*
* We have mismatch on the FMASK only.
* The MAD specification on filt1 narrows its
* scope further thereby making it subset of filt2. Use
* the subset/supset to resolve coverage
*/
if (supset == 0)
{
/*
* filt1 has no range advantage over filt2 so it is
* a proper subset of filt2
*/
IB_LOG_INFO(" Filter SUBSET ", MAI_FILTER_SUBSET);
IB_EXIT(__func__, MAI_FILTER_SUBSET);
return (MAI_FILTER_SUBSET);
}
else
{
/*
* We have contraction of the range on filt1 by
* the presence of the FMASK. We therefore have
* a fuzzy condition.
*/
IB_LOG_INFO(" Filter FUZZY ", MAI_FILTER_FUZZY);
IB_EXIT(__func__, MAI_FILTER_FUZZY);
return (MAI_FILTER_FUZZY);
}
}
/*
* Both filters have active mask; Four conditions can occur.
* 1. The masks,value pairs are equivalent.
* 2. They have nothing in common.
* 3. Filter 1 mask,value is superset of Filter 2
* 4. Filter 1 mask,value is subset of Filter 2
*/
mask_cmp:
/*
* First check for equivalence
*/
if (!memcmp
((void *) (&filt1->value), (void *) (&filt2->value),
sizeof(filt2->value))
&& !memcmp((void *) (&filt1->mask),
(void *) (&filt2->mask),
sizeof(filt2->mask)))
{
/*
* The pairs equate. Use subset supset to resolve
* set relations.
*/
goto fuzzy;
}
/*
* Now check if filt2 will match the value specified in filt1.
* First apply the filt1->mask and pass the result to
* Test with filt2->mask. The logic of this test is that
* if filt1 mask for a given value covers a wider range than
* filt2 mask on the same value then filt2 will cover
* a subset of filt1 value and will therefore have greater
* range of hits. Similarly if filt1 mask covers a shorter
* range that filt2 it will have the greater range.
* If the mad = filt1->mask & filt1->value, is under
* filt2 range we have a collision. IF not then there is
* no overlap here.
*/
{
Mad_t mad;
uint8_t *value,
*mask,
*result;
int rc_tmp;
uint32_t i;
value = (uint8_t *) (&filt1->value);
mask = (uint8_t *) (&filt1->mask);
result = (uint8_t *) & mad;
for (i = 0; i < sizeof(mad); i++)
result[i] = value[i] & mask[i];
rc_tmp = maif_maskequate_filter((void *) &mad, filt2);
if (rc_tmp)
{
/*
* There is intersection. The mask,value pairs of the
* filters intersect. There are two possible
* interpretations here:
* 1. filt1 mask,value is a subset of filt2 mask,value pair
* 2. filt1 mask,value is equal to that of filts2.
* The equivalence test above rules out option 2. So we
* return filt1 is a subset of filt2 if no fuzziness exist.
*/
if (supset == 0)
{
IB_LOG_INFO(" Filter SUBSET ", MAI_FILTER_SUBSET);
IB_EXIT(__func__, MAI_FILTER_SUBSET);
return (MAI_FILTER_SUBSET);
}
else
{
/*
* filt1 is mask,value range is subset of
* filt2 but its header has wider range.
* We therefore have a fuzzy situation.
*/
IB_LOG_INFO(" Filter FUZZY ", MAI_FILTER_FUZZY);
IB_EXIT(__func__, MAI_FILTER_FUZZY);
return (MAI_FILTER_FUZZY);
}
}
/*
* Now we see if filt1 is superset of filt2 mask,value
* pair
*/
value = (uint8_t *) (&filt2->value);
mask = (uint8_t *) (&filt2->mask);
result = (uint8_t *) & mad;
for (i = 0; i < sizeof(mad); i++)
result[i] = value[i] & mask[i];
rc_tmp = maif_maskequate_filter((void *) &mad, filt1);
if (rc_tmp)
{
if (subset == 0)
{
/*
* Filt1 is not a subset of filt2 in any
* way so it is exclusively a superset of
* filt2.
*/
IB_LOG_INFO(" Filter SUPSET ", MAI_FILTER_SUPSET);
IB_EXIT(__func__, MAI_FILTER_SUPSET);
return (MAI_FILTER_SUPSET);
}
else
{
/*
* * filt2 is mask,value range is subset
* of * filt1 but its header has wider
* range. * We therefore have a fuzzy
* situation.
*/
IB_LOG_INFO(" Filter FUZZY ", MAI_FILTER_FUZZY);
IB_EXIT(__func__, MAI_FILTER_FUZZY);
return (MAI_FILTER_FUZZY);
}
}
/*
* The mask value pairs have nothing in common and so cancels
* equivalence in the filters as suggested by the filter headers
*/
IB_LOG_INFO(" Filter DISTINCT", MAI_FILTER_DISTINCT);
IB_EXIT(__func__, MAI_FILTER_DISTINCT);
return (MAI_FILTER_DISTINCT);
}
}
}
else if (mismatch == 0 && rc == 0)
{
/*
* None of the tested flags were active in the filter. Now test the
* MAI_ACT_FMASK to see if we have some action.
*/
/*
* Can't have all the flags on a filter set to zero..
*/
MAI_ASSERT_TRUE(((filt1->active & MAI_ACT_FMASK) != 0));
if ((filt2->active & MAI_ACT_FMASK) == 0)
{
/*
* filt2 has FMASK set; The return value
* is determined soley by the values on the
* mask,value pairs.
*/
goto mask_cmp;
}
}
/*
* If we get here then the filters have nothing in common
*/
IB_LOG_INFO(" Filter DISTINCT", MAI_FILTER_DISTINCT);
IB_EXIT(__func__, MAI_FILTER_DISTINCT);
return (MAI_FILTER_DISTINCT);
}