struct group_info init_groups ={.usage=ATOMIC_INIT(2)};
struct group_info *groups_alloc(int gidsetsize){
struct group_info *group_info;
int nblocks;
int i;
nblocks =(gidsetsize +NGROUPS_PER_BLOCK-1)/NGROUPS_PER_BLOCK;/* Make sure we always allocate at least one indirect block pointer */
nblocks = nblocks ?:1;
group_info =kmalloc(sizeof(*group_info)+ nblocks*sizeof(gid_t *),GFP_USER);if(!group_info)returnNULL;
group_info->ngroups = gidsetsize;
group_info->nblocks = nblocks;atomic_set(&group_info->usage,1);if(gidsetsize <=NGROUPS_SMALL)
group_info->blocks[0]= group_info->small_block;else{for(i =0; i < nblocks; i++){
gid_t *b;
b =(void*)__get_free_page(GFP_USER);if(!b)
goto out_undo_partial_alloc;
group_info->blocks[i]= b;}}return group_info;out_undo_partial_alloc:while(--i >=0){free_page((unsigned long)group_info->blocks[i]);}kfree(group_info);returnNULL;}EXPORT_SYMBOL(groups_alloc);voidgroups_free(struct group_info *group_info){if(group_info->blocks[0]!= group_info->small_block){
int i;for(i =0; i < group_info->nblocks; i++)free_page((unsigned long)group_info->blocks[i]);}kfree(group_info);}EXPORT_SYMBOL(groups_free);/* export the group_info to a user-space array */static int groups_to_user(gid_t __user *grouplist,const struct group_info *group_info){
int i;
unsigned int count = group_info->ngroups;for(i =0; i < group_info->nblocks; i++){
unsigned int cp_count =min(NGROUPS_PER_BLOCK, count);
unsigned int len = cp_count *sizeof(*grouplist);if(copy_to_user(grouplist, group_info->blocks[i], len))return-EFAULT;
grouplist +=NGROUPS_PER_BLOCK;
count -= cp_count;}return0;}/* fill a group_info from a user-space array - it must be allocated already */static int groups_from_user(struct group_info *group_info,
gid_t __user *grouplist){
int i;
unsigned int count = group_info->ngroups;for(i =0; i < group_info->nblocks; i++){
unsigned int cp_count =min(NGROUPS_PER_BLOCK, count);
unsigned int len = cp_count *sizeof(*grouplist);if(copy_from_user(group_info->blocks[i], grouplist, len))return-EFAULT;
grouplist +=NGROUPS_PER_BLOCK;
count -= cp_count;}return0;}/* a simple Shell sort */staticvoidgroups_sort(struct group_info *group_info){
int base, max, stride;
int gidsetsize = group_info->ngroups;for(stride =1; stride < gidsetsize; stride =3* stride +1);/* nothing */
stride /=3;while(stride){
max = gidsetsize - stride;for(base =0; base < max; base++){
int left = base;
int right = left + stride;
gid_t tmp =GROUP_AT(group_info, right);while(left >=0&&GROUP_AT(group_info, left)> tmp){GROUP_AT(group_info, right)=GROUP_AT(group_info, left);
right = left;
left -= stride;}GROUP_AT(group_info, right)= tmp;}
stride /=3;}}/* a simple bsearch */
int groups_search(const struct group_info *group_info, gid_t grp){
unsigned int left, right;if(!group_info)return0;
left =0;
right = group_info->ngroups;while(left < right){
unsigned int mid = left +(right - left)/2;if(grp >GROUP_AT(group_info, mid))
left = mid +1;elseif(grp <GROUP_AT(group_info, mid))
right = mid;elsereturn1;}return0;}/**
* set_groups - Change a group subscription in a set of credentials
* @new: The newly prepared set of credentials to alter
* @group_info: The group list to install
*
* Validate a group subscription and, if valid, insert it into a set
* of credentials.
*/
int set_groups(struct cred *new, struct group_info *group_info){put_group_info(new->group_info);groups_sort(group_info);get_group_info(group_info);new->group_info = group_info;return0;}EXPORT_SYMBOL(set_groups);/**
* set_current_groups - Change current's group subscription
* @group_info: The group list to impose
*
* Validate a group subscription and, if valid, impose it upon current's task
* security record.
*/
int set_current_groups(struct group_info *group_info){
struct cred *new;
int ret;new=prepare_creds();if(!new)return-ENOMEM;
ret =set_groups(new, group_info);if(ret <0){abort_creds(new);return ret;}returncommit_creds(new);}EXPORT_SYMBOL(set_current_groups|
⭐ NEWUPDATE:ServerPacks,CustomLiveries,NewVehicles!SummerUpdateGuide: https://devforum.roblox.com/t/r/1309200EmergencyResponse:LibertyCounty is an emergency services roleplay game.Playas a Civilian, criminal, transportation worker, police officer, sheriff deputy, or firefighter!On the civilian team, work jobs from a farmer to a hospital worker.Police, fire, and DOT roleplay simulator.Check out the game trailer: https://www.youtube.com/watch?v=i-7zcfnwOMU
This game is constantly updated withnewfeatures and improvements.Read the latest update log here: https://devforum.roblox.com/t/r/1400101
Help us test exciting upcoming updates inthis place!Make sure to report issues and ideas through the FeedbackSubmissionbutton(right next to the settings button)!https://www.roblox.com/games/918612434/Test-SeverThe is the AdoptMe test server.It will shutdown spontaneously and frequently as we test.Your data will not load or save here.
{"error":{"type":"AccessSourceError","message":"This service endpoint only responds to events from an external source. If you are the service owner, you can visit https://autocode.com/ to see your current project setup."}}