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pagecache.c
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#include "gsfs.h"
void GSFS_invalidatepage(struct page *page, unsigned long offset);
#ifdef gsfs_test
#define development_pagecache
#endif
#ifdef development_pagecache
#define gwas(mesg) mesg
#else
#define gwas(mesg)
#endif
#define ALLOC_PAGES_MAX_ORDER 5
#define Loop_Pages_WB 10000
#define aes_blocks_per_page (Block_Size/gsfs_aes_keylen)
#define BCOUNT_MIN_OCL 0000
unsigned int get_some_pages(unsigned int len,struct page **res){
unsigned int order,
ret,
rescount,
i,
pow;
struct page* pages;
rescount=0;
ret=0;
order=0;
pow=1;
while(len){
//printk("<0>" "gsp : %u %u %u %u\n",order,len,pow,ret);
if((len&1) || (order==ALLOC_PAGES_MAX_ORDER)){
pages=alloc_pages(GFP_KERNEL,order);
//printk("<0>" "Alloc page: %lx, count: %d\n",pages,atomic_read(&pages->_count));
if(pages){
for(i=0;i<pow;i++){
res[rescount]=pages;
if(i!=0)
get_page(pages);
SetPagePrivate(pages);
set_page_private(pages, (unsigned long)kzalloc(gp_len, GFP_KERNEL));
rescount++;
pages++;
}
ret+=pow;
yield();
}
}
if(order==ALLOC_PAGES_MAX_ORDER)
len--;
else{
order++;
pow<<=1;
len>>=1;
}
}
return ret;
}
int get_block_key_of_reg_inode(char* block_key, crust_ver_type ver, struct inode *inode,
unsigned int block_num){
struct GSFS_inode *inf=(struct GSFS_inode*)inode->i_private;
int i,
ret,
len=gsfs_aes_keylen+sizeof(unsigned int),
min_index=0;
unsigned long min_time;
char temp[len];
//printk("<0>" "get_block_key for inode:%lu, block_num:%u\n", inode->i_ino, block_num);
if(unlikely(!inf->inode_crust_struct || !inf->sri)){
return -1;
}
min_time=inf->sri->key_lru_time[0];
for(i=0; i<key_lru_num; i++){
if(inf->sri->key_lru_time[i]==0){
//add new key to lru
add_new_key:
//memset(temp, 0, len);
//printk("<0>" "add_new_key\n");printkey(temp);
ret=crust_get_key_of_state(&inf->inode_crust_struct->crust_state, ver, temp);
//printk("<0>" "crust_key:\n");printkey(temp);
if(unlikely(ret))
return -1;
memcpy(temp+gsfs_aes_keylen, (char*)(&inode->i_ino), sizeof(unsigned int));
//printk("<0>" "add ino\n");printkey(temp+4);
ret=skein512(gsfs_aes_keylen_bits, temp, len<<3, inf->sri->key_lru_key[i]);
//printk("<0>" "skein\n");printkey(inf->sri->key_lru_key[i]);
inf->sri->key_lru_ver[i]=ver;
goto create_update;
}
if(inf->sri->key_lru_ver[i]==ver){
create_update:
//printk("<0>" "update time from: %ld to %ld\n",inf->sri->key_lru_time[i],jiffies_64);
inf->sri->key_lru_time[i]=jiffies_64;
memcpy(temp, inf->sri->key_lru_key[i], gsfs_aes_keylen);
memcpy(temp+gsfs_aes_keylen, (char*)(&block_num), sizeof(unsigned int));
//printk("<0>" "before skein\n");printkey(temp);printkey(temp+4);
ret=skein512(gsfs_aes_keylen_bits, temp, len<<3, block_key);
memset(temp, 0, len);
return 0;
}
if(inf->sri->key_lru_time[i]<min_time){
min_time=inf->sri->key_lru_time[i];
min_index=i;
}
}
i=min_index;
goto add_new_key;
}
typedef struct{
struct ver_IV_AT *via;
unsigned int block;
} vb_struct;
typedef struct{
struct inode *inode;
vb_struct **vbs;
unsigned int count;
char must_be_sorted;
}set_vias_struct;
int set_vias_cmp(const void *v1, const void *v2){
vb_struct *vb1=*((vb_struct**)v1),
*vb2=*((vb_struct**)v2);
return vb1->block-vb2->block;
}
void set_vias_swp(void *v1, void *v2, int size){
vb_struct **vb1=(vb_struct**)v1,
**vb2=(vb_struct**)v2,
*temp_vb;
temp_vb=*vb1;
*vb1=*vb2;
*vb2=temp_vb;
return;
}
int set_vias(void *data){
int i,
*res;
unsigned int *blocks;
struct ver_IV_AT **vias;
set_vias_struct *svs=(set_vias_struct*)data;
#ifdef development_pagecache
char repp[1000],
*rep=repp;
#endif
if(unlikely(!svs || !svs->inode || !svs->vbs))
return -1;
gwas(sprintf(rep, "set_vias for inode: %lu, count:%u, must_be_sorted:%d",svs->inode->i_ino, svs->count, svs->must_be_sorted));
gwas(rep+=strlen(rep));
gwas(sprintf(rep, " * block numbers:"));
gwas(rep+=strlen(rep));
gwas(for(i=0;i<svs->count;i++){sprintf(rep," #%u",svs->vbs[i]->block);rep+=strlen(rep);if(rep-repp>800){printk("<0>" "%s\n",repp);rep=repp;rep[0]=0;}});
gwas(rep+=strlen(rep));
if(svs->must_be_sorted){
sort(svs->vbs, svs->count, sizeof(vb_struct*), set_vias_cmp, set_vias_swp);
gwas(sprintf(rep, " * sorted to :"));
gwas(rep+=strlen(rep));
gwas(for(i=0;i<svs->count;i++){sprintf(rep," #%u",svs->vbs[i]->block);rep+=strlen(rep);if(rep-repp>800){printk("<0>" "%s\n",repp);rep=repp;rep[0]=0;}});
gwas(rep+=strlen(rep));
}
vias=kzalloc(sizeof(struct ver_IV_AT*)*svs->count, GFP_KERNEL);
blocks=kzalloc(sizeof(unsigned int)*svs->count, GFP_KERNEL);
for(i=0; i<svs->count; i++){
vias[i]=svs->vbs[i]->via;
blocks[i]=svs->vbs[i]->block;
memset(svs->vbs[i], 0, sizeof(vb_struct));
kfree(svs->vbs[i]);
}
res=kzalloc(sizeof(int)*svs->count, GFP_KERNEL);
set_blocks_via(svs->inode, blocks, vias, res, svs->count);
gwas(sprintf(rep, " * results of set_blocks_via :"));
gwas(rep+=strlen(rep));
gwas(for(i=0;i<svs->count;i++){sprintf(rep," # res[%d]: %d", i, res[i]);rep+=strlen(rep);if(rep-repp>800){printk("<0>" "%s\n",repp);rep=repp;rep[0]=0;}});
gwas(rep+=strlen(rep));
//svs->inode->i_sb->s_dirt=1;
memset(vias, 0, sizeof(struct ver_IV_AT*)*svs->count);
kfree(vias);
kfree(blocks);
kfree(res);
kfree(svs->vbs);
kfree(svs);
gwas(printk("<0>" "%s\n",repp));
return 0;
}
#ifdef development_pagecache
#define capv_test
#endif
#ifdef capv_test
#define capv(p) p
#else
#define capv(p)
#endif
int complete_aux_pages_and_vias_for_write(struct inode* inode, struct page **blockpages, unsigned int bcount,
struct page **res_pages, unsigned int *res_count){
int i,
j,
via_count=0,
ret=0;
struct GSFS_inode *inf=(struct GSFS_inode*)inode->i_private;
struct page *page;
struct GSFS_page *gp;
vb_struct **vbs;
unsigned int last_block;
char //block_key[gsfs_aes_keylen],
j0[gsfs_aes_keylen],
must_be_sorted=0;
unsigned long *pd,
*apd;
struct page **results,
**IVs,
**keys;
unsigned int pages_count,
real_count;
char *IVs_charp=0,
*keys_charp=0;
#ifdef capv_test
char repp[1000],
*rep=repp;
sprintf(rep,"complete_aux_pages_and_vias_for_write for inode:%lu, count:%u", inode->i_ino, bcount);
rep+=strlen(rep);
#endif
vbs=kzalloc(sizeof(vb_struct*)*bcount, GFP_KERNEL);
last_block=0;
*res_count=0;
pages_count=bcount/aes_blocks_per_page;
if(bcount%aes_blocks_per_page)
pages_count++;
results=kzalloc(sizeof(struct page*)*bcount, GFP_KERNEL);
IVs=kzalloc(sizeof(struct page*)*pages_count, GFP_KERNEL);
keys=kzalloc(sizeof(struct page*)*pages_count, GFP_KERNEL);
for(i=0;i<pages_count;i++){
IVs[i]=alloc_page(GFP_KERNEL);
keys[i]=alloc_page(GFP_KERNEL);
}
real_count=0;
for(i=0; i<bcount; i++){
#ifdef capv_test
if(rep-repp>500){
printk("<0>" "%s\n",repp);
rep=repp;
rep[0]=0;
}
#endif
if(i%aes_blocks_per_page==0){
int c=i/aes_blocks_per_page;
IVs_charp=page_address(IVs[c]);
keys_charp=page_address(keys[c]);
}
page=blockpages[i];
if(unlikely(!page)){
continue;
}
capv(sprintf(rep,"## i:%d, page: %lx, index: %lu ", i, (unsigned long)page, page->index));
capv(rep+=strlen(rep));
gp=(struct GSFS_page*)page_private(page);
if(unlikely(!gp || !gp->sip)){
epwb:
end_page_writeback(page);
capv(sprintf(rep,"* epwb "));
capv(rep+=strlen(rep));
continue;
}
gp->sip->spflags &= ~spflag_aux_page_is_ready;
if(unlikely(!gp->sip->via || !gp->sip->aux_page)){
goto epwb;
}
capv(sprintf(rep," * spflag_key_is_ready:%d, ver: %u, max_ver:%u ", gp->sip->spflags & spflag_key_is_ready, gp->sip->via->ver, inf->inode_crust_struct->max_ver));
capv(rep+=strlen(rep));
capv(sprintf(rep," * via : "));
capv(rep+=strlen(rep));
capv(printhexstring((char*) gp->sip->via, rep, 32));
capv(rep+=strlen(rep));
if( !(gp->sip->spflags & spflag_key_is_ready) ||
gp->sip->via->ver !=inf->inode_crust_struct->max_ver ){
gp->sip->via->ver=inf->inode_crust_struct->max_ver;
ret=get_block_key_of_reg_inode(gp->sip->key, gp->sip->via->ver, inode, page->index);
if(unlikely(ret)){
goto epwb;
}
gp->sip->spflags |= spflag_key_is_ready;
capv(sprintf(rep," * get_block_key_of_reg_inode : "));
capv(rep+=strlen(rep));
capv(printhexstring(gp->sip->key, rep, 16));
capv(rep+=strlen(rep));
}
ret=inc_IV(gp->sip->via->IV);
if(unlikely(ret)){
printk("<0>" "Unable to write page: %lu of inode: %lu, IV is full.\n", page->index, inode->i_ino);
goto epwb;
}
capv(sprintf(rep," * new IV: "));
capv(rep+=strlen(rep));
capv(printhexstring(gp->sip->via->IV, rep, 12));
capv(rep+=strlen(rep));
results[real_count]=gp->sip->aux_page;
real_count++;
memcpy(IVs_charp, gp->sip->via->IV, gsfs_IV_len);
memcpy(keys_charp, gp->sip->key, gsfs_aes_keylen);
IVs_charp+=gsfs_aes_keylen;
keys_charp+=gsfs_aes_keylen;
}
capv(sprintf(rep," **##** real_count: %u **##** ", real_count));
capv(rep+=strlen(rep));
if(likely(real_count)){
int response=-1;
OCL_kernel_struct* oks=0;
oks=gum_get_gctr_pages(inode->i_sb, IVs, keys, results, real_count);
if(unlikely(oks)){
oks->waiters_num++;
up(&oks->wanu_sem);
}
capv(sprintf(rep," **##** oks: %lx **##** ", (unsigned long)oks));
capv(rep+=strlen(rep));
if(likely(oks)){
down(&oks->sem);
response=oks->ret;
capv(sprintf(rep," **##** ret of gum: %d **##** ", oks->ret));
capv(rep+=strlen(rep));
if(atomic_inc_return(&oks->waiters_returned)==oks->waiters_num){
capv(sprintf(rep," **##** freeing oks **##** "));
capv(rep+=strlen(rep));
memset(oks, 0, sizeof(OCL_kernel_struct));
kfree(oks);
}
}
if(response)
//there was no gum or there was some problem in our gum,
//therefore we should do its work ourselves
for(i=0; i<real_count; i++){
page=((struct GSFS_page*)page_private(results[i]))->origin_page;
gp=(struct GSFS_page*)page_private(page);
apd=(unsigned long*)page_address(gp->sip->aux_page);
ret=get_gctr_page((char*)apd, gp->sip->key, gp->sip->via->IV);
if(unlikely(ret)){
end_page_writeback(page);
continue;
}
}
//here all of our aux_pages are ready
}
for(i=0; i<real_count; i++){
#ifdef capv_test
if(rep-repp>500){
printk("<0>" "%s\n",repp);
rep=repp;
rep[0]=0;
}
#endif
page=((struct GSFS_page*)page_private(results[i]))->origin_page;
gp=(struct GSFS_page*)page_private(page);
capv(sprintf(rep,"#SR# i:%d, page: %lx, index: %lu ", i, (unsigned long)page, page->index));
capv(rep+=strlen(rep));
pd=(unsigned long*)page_address(page);
apd=(unsigned long*)page_address(gp->sip->aux_page);
ret=get_j0(j0, gp->sip->via->IV);
if(unlikely(ret)){
end_page_writeback(page);
continue;
}
for(j=0; j<Block_Size/sizeof(unsigned long); j++)
apd[j]^=pd[j];
capv(sprintf(rep,"16-byte of apd: "));
capv(rep+=strlen(rep));
capv(printhexstring((char*)apd, rep, 16));
capv(rep+=strlen(rep));
capv(sprintf(rep,"j0: "));
capv(rep+=strlen(rep));
capv(printhexstring(j0, rep, 16));
capv(rep+=strlen(rep));
get_AT(gp->sip->via->AT, (char*)apd, gp->sip->key, j0);
capv(sprintf(rep," * new AT: "));
capv(rep+=strlen(rep));
capv(printhexstring(gp->sip->via->AT, rep, 16));
capv(rep+=strlen(rep));
if(page->index<last_block)
must_be_sorted=1;
last_block=page->index;
vbs[via_count]=kzalloc(sizeof(vb_struct), GFP_KERNEL);
vbs[via_count]->via=gp->sip->via;
vbs[via_count]->block=page->index;
via_count++;
capv(sprintf(rep," * via_count: %u i:%d ",via_count,i));
capv(rep+=strlen(rep));
gp->sip->spflags |= spflag_aux_page_is_ready;
res_pages[(*res_count)++]=gp->sip->aux_page;
}
capv(sprintf(rep," * i:%d ",i));
capv(rep+=strlen(rep));
if(via_count){
struct task_struct *kt;
set_vias_struct *svs;
svs=kzalloc(sizeof(set_vias_struct), GFP_KERNEL);
svs->vbs=vbs;
svs->count=via_count;
svs->inode=inode;
svs->must_be_sorted=must_be_sorted;
//kt=kthread_run(set_vias, svs, "gsfs-set vias thread");
//we have something less here
//if you want to run set_vias as an independent thread
//you should
// 1)set s_dirt of superblock yourself
// 2)add a flag to spflag to stop release page until via is written
set_vias(svs);
if (0&&IS_ERR(kt)){
printk("<0>" "Failed to create kernel thread\n");
for(i=0; i<via_count; i++){
memset(vbs[i], 0, sizeof(vb_struct));
kfree(vbs[i]);
}
kfree(svs);
goto no_count;
}
}
else{
no_count:
kfree(vbs);
}
for(i=0;i<pages_count;i++){
memset(page_address(IVs[i]), 0, Block_Size);
__free_page(IVs[i]);
memset(page_address(keys[i]), 0, Block_Size);
__free_page(keys[i]);
}
memset(results, 0, sizeof(struct page*)*bcount);
kfree(results);
memset(IVs, 0, sizeof(struct page*)*pages_count);
kfree(IVs);
memset(keys, 0, sizeof(struct page*)*pages_count);
kfree(keys);
//memset(block_key, 0, gsfs_aes_keylen);
memset(j0, 0, gsfs_aes_keylen);
capv(printk("<0>" "%s\n",repp));
return 0;
}
//all of the pages have their via, you should unlock blockpages
int complete_aux_pages_and_authenticate_for_read(struct inode* inode, struct page **blockpages,
unsigned int bcount, OCL_kernel_struct *oks){
//struct GSFS_inode *inf=(struct GSFS_inode*)inode->i_private;
int i,
j,
ret;
struct page *page;
char j0[gsfs_aes_keylen],
AT[gsfs_aes_keylen];
struct GSFS_page *gp;
unsigned long *pd,
*apd;
#ifdef capv_test
char repp[1000],
*rep=repp;
sprintf(rep,"complete_aux_pages_and_authenticate_for_read for inode: %lu, count: %u", inode->i_ino, bcount);
rep+=strlen(rep);
#endif
for(i=0; i<bcount; i++){
#ifdef capv_test
if(rep-repp>500){
printk("<0>" "%s\n",repp);
rep=repp;
rep[0]=0;
}
#endif
page=blockpages[i];
if(unlikely(!page)){
continue;
}
capv(sprintf(rep,"#FR# i:%d, page: %lx, index: %lu ", i, (unsigned long)page, page->index));
capv(rep+=strlen(rep));
gp=(struct GSFS_page*)page_private(page);
if(unlikely(!gp || !gp->sip || !gp->sip->via || !gp->sip->aux_page)){
upr:
unlock_page(page);
if(likely(gp && gp->sip)){
gp->sip->spflags &= ~spflag_page_is_ready_for_read;
gp->sip->spflags |= spflag_page_is_refused_in_first_round_of_read;
}
continue;
}
gp->sip->spflags &= ~spflag_page_is_authenticated;
gp->sip->spflags &= ~spflag_page_is_refused_in_first_round_of_read;
capv(sprintf(rep," * ver: %u, aux_page: %lx, via ", gp->sip->via->ver, (unsigned long)gp->sip->aux_page));
capv(rep+=strlen(rep));
capv(printhexstring((char*) gp->sip->via, rep, 32));
capv(rep+=strlen(rep));
capv(sprintf(rep," * IV: "));
capv(rep+=strlen(rep));
capv(printhexstring(gp->sip->via->IV, rep, 12));
capv(rep+=strlen(rep));
pd=(unsigned long*)page_address(page);
ret=get_j0(j0, gp->sip->via->IV);
if(unlikely(ret)){
goto upr;
}
capv(sprintf(rep," * j0: "));
capv(rep+=strlen(rep));
capv(printhexstring(j0, rep, 16));
capv(rep+=strlen(rep));
get_AT(AT, (char*)pd, gp->sip->key, j0);
capv(sprintf(rep," * AT: "));
capv(rep+=strlen(rep));
capv(printhexstring(AT, rep, 16));
capv(rep+=strlen(rep));
capv(sprintf(rep," * via AT: "));
capv(rep+=strlen(rep));
capv(printhexstring(gp->sip->via->AT, rep, 16));
capv(rep+=strlen(rep));
capv(sprintf(rep,"16-byte of pd: "));
capv(rep+=strlen(rep));
capv(printhexstring((char*)pd, rep, 16));
capv(rep+=strlen(rep));
if(strncmp(AT, gp->sip->via->AT, gsfs_aes_keylen)){
printk("<0>" "Page %lu of inode %lu is not integrated.\n", page->index, inode->i_ino);
goto upr;
}
gp->sip->spflags |= spflag_page_is_authenticated;
}
//waiting for aux_pages completeion with ocl
if(oks){
int response;
down(&oks->sem);
response=oks->ret;
capv(sprintf(rep," **##** ret of gum: %d **##** ", oks->ret));
capv(rep+=strlen(rep));
if(response==0)
for(i=0; i<bcount; i++){
struct GSFS_page* gp=(struct GSFS_page*)page_private(blockpages[i]);
if(likely(gp && gp->sip))
gp->sip->spflags |= spflag_aux_page_is_ready;
}
if(atomic_inc_return(&oks->waiters_returned)==oks->waiters_num){
capv(sprintf(rep," **##** freeing oks **##** "));
capv(rep+=strlen(rep));
for(i=0;i<oks->IVs_pages_count;i++){
memset(page_address(oks->IVs[i]), 0, Block_Size);
__free_page(oks->IVs[i]);
memset(page_address(oks->keys[i]), 0, Block_Size);
__free_page(oks->keys[i]);
}
memset(oks->results, 0, sizeof(struct page*)*oks->results_count);
kfree(oks->results);
memset(oks->IVs, 0, sizeof(struct page*)*oks->IVs_pages_count);
kfree(oks->IVs);
memset(oks->keys, 0, sizeof(struct page*)*oks->IVs_pages_count);
kfree(oks->keys);
memset(oks, 0, sizeof(OCL_kernel_struct));
kfree(oks);
}
}
for(i=0; i<bcount; i++){
#ifdef capv_test
if(rep-repp>500){
printk("<0>" "%s\n",repp);
rep=repp;
rep[0]=0;
}
#endif
page=blockpages[i];
if(unlikely(!page)){
continue;
}
capv(sprintf(rep,"#SR# i:%d, page: %lx, index: %lu ", i, (unsigned long)page, page->index));
capv(rep+=strlen(rep));
gp=(struct GSFS_page*)page_private(page);
if(unlikely(
!gp || !gp->sip ||
(gp->sip->spflags & spflag_page_is_refused_in_first_round_of_read) ||
!(gp->sip->spflags & spflag_page_is_authenticated)
) ){
continue;
}
pd=(unsigned long*)page_address(page);
apd=(unsigned long*)page_address(gp->sip->aux_page);
if(!(gp->sip->spflags & spflag_aux_page_is_ready)){
capv(sprintf(rep,"We should calculate this aux_page ourselves "));
capv(rep+=strlen(rep));
ret=get_gctr_page((char*)apd, gp->sip->key, gp->sip->via->IV);
if(unlikely(ret)){
unlock_page(page);
continue;
}
}
for(j=0; j<Block_Size/sizeof(unsigned long); j++)
pd[j]^=apd[j];
gp->sip->spflags |= spflag_page_is_ready_for_read;
unlock_page(page);
}
memset(j0, 0, gsfs_aes_keylen);
capv(printk("<0>" "%s\n",repp));
return 0;
}
static void GSFS_sec_readpages_bio_end(struct bio *bio, int err){
int i,
utd = test_bit(BIO_UPTODATE, &bio->bi_flags);
struct bio_vec *bv=bio->bi_io_vec;
struct page *p,
**pages=0;
unsigned int count=0;
OCL_kernel_struct *oks=0;
gwas(printk("<0>" "GSFS_sec_readpages_bio_end started and vcnt: %u,err: %d\n",bio->bi_vcnt,err));
if(likely(bio->bi_vcnt))
pages=kzalloc(sizeof(struct page*)*bio->bi_vcnt, GFP_KERNEL);
for(i=0;i<bio->bi_vcnt;i++){
p=bv->bv_page;
//gwas(printk("<0>" "GSFS_sec_readpages_bio_end started and page:%lx\n",(unsigned long)p));
if(likely(utd)){
SetPageUptodate(p);
pages[count++]=p;
}
else{
ClearPageUptodate(p);
SetPageError(p);
unlock_page(p);
}
bv++;
}
oks=(OCL_kernel_struct*)bio->bi_private;
if(likely(count) && likely(pages[0]->mapping && pages[0]->mapping->host))
complete_aux_pages_and_authenticate_for_read(pages[0]->mapping->host, pages, count, oks);
gwas(printk("<0>" "GSFS_sec_readpages_bio_end ended. pid:%u\n",current->pid));
if(likely(pages)){
memset(pages, 0, sizeof(struct page*)*bio->bi_vcnt);
kfree(pages);
}
bio_put(bio);
return;
}
static void GSFS_readpages_bio_end(struct bio *bio, int err){
int i;
int utd = test_bit(BIO_UPTODATE, &bio->bi_flags);
struct bio_vec * bv=bio->bi_io_vec;
struct page* p;
gwas(printk("<0>" "GSFS_readpages_bio_end started and vcnt: %u,err: %d\n",bio->bi_vcnt,err));
for(i=0;i<bio->bi_vcnt;i++){
p=bv->bv_page;
if(utd)
SetPageUptodate(p);
else{
ClearPageUptodate(p);
SetPageError(p);
}
//printk("<0>" "mybioend %d %lx %d\n",i,(unsigned long)p,utd);
unlock_page(p);
bv++;
}
bio_put(bio);
gwas(printk("<0>" "GSFS_readpages_bio_end ended. pid:%u\n",current->pid));
return;
}
int pagecmp(const void *p1, const void *p2){
struct page *page1=*((struct page**)p1),
*page2=*((struct page**)p2);
return (((struct GSFS_page*)page_private(page1))->disk_bnr)-(((struct GSFS_page*)page_private(page2))->disk_bnr);
}
void pageswp(void *p1, void *p2, int size){
struct page **page1=(struct page**)p1,
**page2=(struct page**)p2,
*pp;
//printk("<0>" "pageswp page1=%lx,page2=%lx,%d",(unsigned long)*page1,(unsigned long)*page2,size);
//return;
pp=*page1;
*page1=*page2;
*page2=pp;
return;
}
int GSFS_sort_and_submit_bio_for_sec_pages(struct inode* inode,struct page** blockpages,unsigned int bcount,
int mode, bio_end_io_t* end_bio_func ){
//struct GSFS_inode *inf=(struct GSFS_inode*)inode->i_private;
sector_t current_block,
prev_block;
unsigned int l,
newbio,
biolen=0,
prev_biolen=0,
biocount=0;
int last_add_res=0,
ret=0;
struct bio *bio=0;
struct page **pages=0;
//struct GSFS_page *gp;
OCL_kernel_struct* oks=0;
#ifdef development_pagecache
char repp[1000],
*rep=repp;
sprintf(rep,"GSFS_sort_and_submit_bio_for_sec_pages for inode:%lu, write=%d, bcount=%d",inode->i_ino, mode==WRITE,bcount);
rep+=strlen(rep);
#endif
if(unlikely(!blockpages || !bcount))
return -1;
sort(blockpages, bcount, sizeof(struct page*), pagecmp, pageswp);
if(mode==WRITE){
unsigned int count=0;
pages=kzalloc(sizeof(struct page*)*bcount, GFP_KERNEL);
complete_aux_pages_and_vias_for_write(inode, blockpages, bcount, pages, &count);
blockpages=pages;
bcount=count;
gwas(sprintf(rep, " * new count: %u", count));
gwas(rep+=strlen(rep));
}
else{
int i;
struct page **results=0,
**IVs=0,
**keys=0;
unsigned int pages_count=0,
real_count=0;
char *IVs_charp=0,
*keys_charp=0;
struct GSFS_page *gp;
struct page *page;
if(bcount>=BCOUNT_MIN_OCL){
pages_count=bcount/aes_blocks_per_page;
if(bcount%aes_blocks_per_page)
pages_count++;
results=kzalloc(sizeof(struct page*)*bcount, GFP_KERNEL);
IVs=kzalloc(sizeof(struct page*)*pages_count, GFP_KERNEL);
keys=kzalloc(sizeof(struct page*)*pages_count, GFP_KERNEL);
for(i=0;i<pages_count;i++){
IVs[i]=alloc_page(GFP_KERNEL);
keys[i]=alloc_page(GFP_KERNEL);
}
real_count=0;
}
for(i=0; i<bcount; i++){
if(bcount>=BCOUNT_MIN_OCL && i%aes_blocks_per_page==0){
int c=i/aes_blocks_per_page;
IVs_charp=page_address(IVs[c]);
keys_charp=page_address(keys[c]);
}
page=blockpages[i];
if(unlikely(!page)){
continue;
}
gp=(struct GSFS_page*)page_private(page);
if(unlikely(!gp || !gp->sip)){
continue;
}
if( !(gp->sip->spflags & spflag_key_is_ready) ){
ret=get_block_key_of_reg_inode(gp->sip->key, gp->sip->via->ver, inode, page->index);
if(unlikely(ret)){
continue;
}
gp->sip->spflags |= spflag_key_is_ready;
}
gp->sip->spflags &= ~spflag_aux_page_is_ready;
if(unlikely(!gp->sip->via || !gp->sip->aux_page)){
continue;
}
if(bcount>=BCOUNT_MIN_OCL){
results[real_count]=gp->sip->aux_page;
real_count++;
memcpy(IVs_charp, gp->sip->via->IV, gsfs_IV_len);
memcpy(keys_charp, gp->sip->key, gsfs_aes_keylen);
IVs_charp+=gsfs_aes_keylen;
keys_charp+=gsfs_aes_keylen;
}
}
if(likely(real_count)){
oks=gum_get_gctr_pages(inode->i_sb, IVs, keys, results, real_count);
if(unlikely(!oks)){
//freeing allocated IVs, keys, results
for(i=0;i<pages_count;i++){
memset(page_address(IVs[i]), 0, Block_Size);
__free_page(IVs[i]);
memset(page_address(keys[i]), 0, Block_Size);
__free_page(keys[i]);
}
memset(results, 0, sizeof(struct page*)*bcount);
kfree(results);
memset(IVs, 0, sizeof(struct page*)*pages_count);
kfree(IVs);
memset(keys, 0, sizeof(struct page*)*pages_count);
kfree(keys);
}
//gt(printk("<0>" "oks in read: %lx \n",(unsigned long)oks));
}
}