/*
* EvGetEventClassName() finds the class name string associated with an event
* class ID. This function works only locally because all event classes
* should be known locally.
*
* If the event group cound not be found -EEXIST will be returned. If
* the class identified by className is not registered the -ESRCH will
* be returned. Else "class" will be filled with the unique class
* ID assiged to className and a zero will be returned to indicates
* success.
*/
int
EvGetEventClassName(EvGroupID_t groupID, EvClassID_t classID, char *className)
{
EvGroupInfo_t *EGroup;
EvClassInfo_t *HashBase;
unsigned long Flags;
int RetVal;
/* Get the group info pointer and return with it locked. */
if ((RetVal = EvLockAndGetGroup(groupID, EV_ACCESS_IGNORE,
EAC_NONE, &Flags,
EV_LOCK_GROUP_READ, &EGroup))) {
return RetVal;
}
HashBase = EvGetHashBase(EGroup, classID);
while (HashBase->EciNext) {
if (HashBase->EciClass == classID) {
strncpy(className, HashBase->EciName, 16);
read_unlock_irqrestore(&EGroup->EgiLock, Flags);
return EV_NOERR;
}
HashBase = HashBase->EciNext;
}
read_unlock_irqrestore(&EGroup->EgiLock, Flags);
return -EV_ERROR_CLASS_EXISTS;
}
/*
* EvUnRegisterEventClass() removes an event class from the list
* of known event classes. If this is a local event group then
* it is removed only locally. If this is a member of an event
* group then a notices is sent to the master to remove the event
* class. If the master indicates it is OK then the class is removed
* locally.
*
* If this is an event master and every thing is OK locally then
* the event class is removes locally and the members are informed
* to remove it also.
*/
int
EvUnRegisterEventClass(EvGroupID_t groupID, EvClassID_t classID,
EvAccess_t accessCode)
{
EvGroupInfo_t *EGroup;
unsigned long Flags;
int RetVal;
/* Get the group info pointer and return with it locked. */
if ((RetVal = EvLockAndGetGroup(groupID, EV_ACCESS_IGNORE,
EAC_NONE, &Flags,
EV_LOCK_GROUP_WRITE, &EGroup))) {
return RetVal;
}
/* If this is a Member send remove request to master. */
if (EGroup->EgiType == EG_MEMBER) {
if ((RetVal = EvSendUnRegEventClass(EGroup, accessCode,
classID, &Flags)) < 0) {
write_unlock_irqrestore(&EGroup->EgiLock, Flags);
return RetVal;
}
}
RetVal = EvInternalUnRegisterEventClass(EGroup, classID, accessCode);
write_unlock_irqrestore(&EGroup->EgiLock, Flags);
return RetVal;
}
int
EvSyncToMember(EvGroupID_t groupID, EvAccess_t accessCode, EvGroupID_t memberID)
{
EvGroupInfo_t *EGroup;
EvClassInfo_t *HashBase;
unsigned long Flags;
int Hash;
int RetVal;
/* Get the group info pointer and return with it locked. */
if ((RetVal = EvLockAndGetGroup(groupID, EV_ACCESS_CHECK,
accessCode, &Flags,
EV_LOCK_GROUP_READ, &EGroup))) {
return RetVal;
}
/* If this a remote gen to the master then echo it back to
* all members.
*/
if (EGroup->EgiType != EG_MASTER) {
read_unlock_irqrestore(&EGroup->EgiLock, Flags);
return EV_ERROR_GROUP_TYPE;
}
for (Hash = 0; Hash < EGroup->EgiHashSize; Hash++) {
HashBase = &EGroup->EgiClassHash[Hash];
while (HashBase->EciNext != NULL) {
if (HashBase->EciClass == EV_CONTROL_CLASS_ID) {
HashBase = HashBase->EciNext;
continue;
}
RetVal = EvGroupSendEvent(0, 0, EGroup->EgiID, memberID, -1,
EV_CONTROL_CLASS_ID,
EV_MASTER_REG_EVENT_CLASS,
accessCode, HashBase->EciAccessCode,
HashBase->EciClass, 0,
&EGroup->EgiGroupDest,
strlen(HashBase->EciName) + 1,
HashBase->EciName);
if (RetVal) {
read_unlock_irqrestore(&EGroup->EgiLock, Flags);
return RetVal;
}
HashBase = HashBase->EciNext;
}
}
read_unlock_irqrestore(&EGroup->EgiLock, Flags);
return EV_NOERR;
}
/*
* EvGetEventClassID() finds the ID associated with an event class name
* passed in className. This function works only locally because
* all event classes should be known locally.
*
* If the event group cound not be found -EEXIST will be returned. If
* the class identified by className is not registered the -ESRCH will
* be returned. Else "class" will be filled with the unique class
* ID assiged to className and a zero will be returned to indicates
* success.
*/
int
EvGetEventClassID(EvGroupID_t groupID, char *className, EvClassID_t *classID)
{
EvGroupInfo_t *EGroup;
unsigned long Flags;
int RetVal;
/* Get the group info pointer and return with it locked. */
if ((RetVal = EvLockAndGetGroup(groupID, EV_ACCESS_IGNORE,
EAC_NONE, &Flags,
EV_LOCK_GROUP_READ, &EGroup))) {
return RetVal;
}
RetVal = EvCheckEventClass(EGroup, className, classID);
read_unlock_irqrestore(&EGroup->EgiLock, Flags);
return RetVal;
}
/*
* EvGetUserID() returns the user ID associated with the name string
* passed into the register user function.
*
* If the group ID identifies a group of events that are local or this
* system is the master controler or the member ID is this system then it
* searches the local systems users for the specified name. Otherwise
* a request for the information is sent to the remote system.
*
* If groupID does not specify a known group then -EEXIST is returned. IF
* userName is not found in the correct list the -ESRCH is returned.
* Otherwise a 0 is returned and userID contains the associated unique
* user ID.
*/
int
EvGetUserID(EvGroupID_t groupID, EvGroupID_t memberID,
char *userName, EvUserID_t *userID)
{
EvKernelInfo_t *TmpUser;
EvGroupInfo_t *EGroup;
unsigned long Flags;
int RetVal;
/* Get the group info pointer and return with it locked. */
if ((RetVal = EvLockAndGetGroup(groupID, EV_ACCESS_IGNORE,
EAC_NONE, &Flags,
EV_LOCK_GROUP_WRITE, &EGroup))) {
return RetVal;
}
/* If the memberID passed in does not match this system then send
* a message to the master to retieve and return it.
*/
if ((EGroup->EgiType != EG_LOCAL)&&(EGroup->EgiMemberID != memberID)) {
RetVal = EvSendGetUserID(groupID, memberID, userName, userID);
write_unlock_irqrestore(&EGroup->EgiLock, Flags);
return RetVal;
}
/* Get the user ID from this system. */
read_lock(&EvUsersLock);
write_unlock(&EGroup->EgiLock);
TmpUser = EvUsersHead;
while (TmpUser) {
if (!strcmp(TmpUser->EkiName, userName)) {
*userID = TmpUser->EkiID;
read_unlock_irqrestore(&EvUsersLock, Flags);
return EV_NOERR;
}
TmpUser = TmpUser->EkiNext;
}
read_unlock_irqrestore(&EvUsersLock, Flags);
return -EV_ERROR_USER_EXISTS;
}
/*
* EventGetUserName() returns the user name string associated with the
* Ruser ID returned from the register user function.
*
* If the group ID identifies a group of events that are local or this
* system is the master controler or the member ID is this system then it
* searches the local systems users for the specified ID. Otherwise
* a request for the information is sent to the remote system.
*
* If groupID does not specify a known group then -EEXIST is returned. IF
* userName is not found in the correct list the -ESRCH is returned.
* Otherwise a 0 is returned and userID contains the associated unique
* user ID.
*/
int
EvGetUserName(EvGroupID_t groupID, EvGroupID_t memberID,
EvUserID_t userID, char *userName)
{
EvGroupInfo_t *EGroup;
EvKernelInfo_t *TmpUser;
unsigned long Flags;
int RetVal;
/* Get the group info pointer and return with it locked. */
if ((RetVal = EvLockAndGetGroup(groupID, EV_ACCESS_IGNORE,
EAC_NONE, &Flags,
EV_LOCK_GROUP_WRITE, &EGroup))) {
return RetVal;
}
if ((EGroup->EgiType == EG_MEMBER)&&(EGroup->EgiMemberID != memberID)) {
RetVal = EvSendGetUserName(EGroup, memberID, userID, userName, &Flags);
write_unlock_irqrestore(&EGroup->EgiLock, Flags);
return RetVal;
}
read_lock(&EvUsersLock);
write_unlock(&EGroup->EgiLock);
TmpUser = EvUsersHead;
while (TmpUser) {
if (TmpUser->EkiID == userID) {
strncpy(userName, TmpUser->EkiName, 16);
read_unlock_irqrestore(&EvUsersLock, Flags);
return 0;
}
TmpUser = TmpUser->EkiNext;
}
read_unlock_irqrestore(&EvUsersLock, Flags);
return -EV_ERROR_USER_EXISTS;
}
/*
* The EvRegisterEventClass() function registers the className string as the
* identifier of an event class and returns a unique token to identify that
* class. The class is created as a part of an event group.
*
* If the event group is local then the event class is created as a part
* of the local events and can be used only on the registering system. If
* this system is the master for an event group then a local identity is
* created on this system and notification is sent to remote systems to
* inidcate this event has been created. If this event group is a member
* on this system then the master is told to register this event class and
* return the class ID and then a local copy of the registeration is made.
*
* If the event group defined by groupID does not exist then -EEXIST is
* returned and no class is registered. If the event class defined by
* className already exists -EBUSY is returned and not class is registered.
* returned. If the kernel could not allocate enough memory for the
* controling data structures -ENOSPC is returned and not class is
* registered. Otherwise the class identified by className is registered,
* a unique ID is allocated and placed in the class parameter and a
* zero is returned to indicate success.
*/
int
EvRegisterEventClass(EvGroupID_t groupID, char *className,
EvAccess_t groupAccessCode, EvAccess_t classAccessCode,
EvClassID_t *classID)
{
EvGroupInfo_t *EGroup;
EvClassInfo_t *HashBase;
unsigned long Flags;
int RetVal;
/* Get the group info pointer and return with it locked. */
if ((RetVal = EvLockAndGetGroup(groupID, EV_ACCESS_CHECK,
groupAccessCode, &Flags,
EV_LOCK_GROUP_WRITE, &EGroup))) {
return RetVal;
}
/* Check to see if the class already exists */
if (EvCheckEventClass(EGroup, className, classID) > -1) {
write_unlock_irqrestore(&EGroup->EgiLock, Flags);
return -EV_ERROR_CLASS_EXISTS;
}
/* If the event class is not a local one then send a register to
* the remote master. The remote master returns the class ID.
*/
if ((EGroup->EgiType == EG_MEMBER) && EGroup->EgiNextClass) {
if ((RetVal = EvSendRegEventClass(EGroup, className,
groupAccessCode,
classAccessCode,
classID, &Flags)) < 0) {
write_unlock_irqrestore(&EGroup->EgiLock, Flags);
return RetVal;
}
} else {
/* Class is locally assigned */
*classID = EGroup->EgiNextClass++;
/* If this is an event master then send class create event. */
if (EGroup->EgiType == EG_MASTER) {
if ((RetVal = EvSendRegClassToMembers(EGroup, className,
groupAccessCode,
classAccessCode, *classID))) {
write_unlock_irqrestore(&EGroup->EgiLock, Flags);
return RetVal;
}
}
}
HashBase = EvGetHashBase(EGroup, *classID);
while (HashBase->EciNext != NULL) {
HashBase = HashBase->EciNext;
}
RetVal=EvFillInHashInfo(HashBase, classAccessCode, className, classID);
EGroup->EgiUseCount++;
write_unlock_irqrestore(&EGroup->EgiLock, Flags);
return RetVal;
}
int
EvSendGetUserID(EvGroupID_t groupID, EvGroupID_t memberID,
char *userName, EvUserID_t *userID)
{
EvGroupInfo_t *EGroup;
EvPendRem_t *Pend;
unsigned long Flags;
int RetVal;
/* Get the group info pointer and return with it locked. */
if ((RetVal = EvLockAndGetGroup(groupID, EV_ACCESS_IGNORE,
EAC_NONE, &Flags,
EV_LOCK_GROUP_WRITE, &EGroup))) {
return RetVal;
}
/* Check to see if there is a remote control entity registered. */
if (EGroup->EgiGroupDest.EdID == 0) {
write_unlock_irqrestore(&EGroup->EgiLock, Flags);
return -EV_ERROR_NO_REMOTE;
}
/* Allocate an entry to pend on while remote request is processed. */
if ((Pend = EvGetPendEntry(EGroup, EV_REM_GET_USER_ID,
memberID, 0, 0, 0,
strlen(userName) + 1, userName)) == NULL) {
write_unlock_irqrestore(&EGroup->EgiLock, Flags);
return -EV_ERROR_MEM_ALLOC;
}
/* Send the reqest to the waiting control agent. */
RetVal = EvGroupSendEvent(0, 0, EGroup->EgiID, EGroup->EgiMemberID,
-1, EV_CONTROL_CLASS_ID, EV_REM_GET_USER_ID,
memberID, 0, 0, 0, &EGroup->EgiGroupDest,
strlen(userName) + 1, userName);
if (RetVal) {
EvDelPendEntry(EGroup, Pend);
write_unlock_irqrestore(&EGroup->EgiLock, Flags);
return RetVal;
}
/* Make sure group cannont be removed and Wait for information
* to be returned. */
EGroup->EgiUseCount++;
write_unlock_irqrestore(&EGroup->EgiLock, Flags);
interruptible_sleep_on(&Pend->PrWaitQ);
/* Reaquire the load and releas the group use count to allow other
* group activities. */
write_lock_irqsave(&EGroup->EgiLock, Flags);
EGroup->EgiUseCount--;
/* If an error has been indicated then return it. */
RetVal = Pend->PrRetInfo.EpInfo[0];
if (RetVal) {
/* Free the Pend data structure. */
EvDelPendEntry(EGroup, Pend);
write_unlock_irqrestore(&EGroup->EgiLock, Flags);
return -RetVal;
}
/* Fill in user userID information. */
*userID = Pend->PrRetInfo.EpInfo[1];
/* Free the Pend data structure. */
EvDelPendEntry(EGroup, Pend);
write_unlock_irqrestore(&EGroup->EgiLock, Flags);
return EV_NOERR;
}