static void
test_access(int fd)
{
uint32_t handle, flink, handle2;
struct drm_i915_gem_mmap_gtt mmap_arg;
int fd2;
handle = gem_create(fd, OBJECT_SIZE);
igt_assert(handle);
fd2 = drm_open_driver(DRIVER_INTEL);
/* Check that fd1 can mmap. */
mmap_arg.handle = handle;
do_ioctl(fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &mmap_arg);
igt_assert(mmap64(0, OBJECT_SIZE, PROT_READ | PROT_WRITE,
MAP_SHARED, fd, mmap_arg.offset));
/* Check that the same offset on the other fd doesn't work. */
igt_assert(mmap64(0, OBJECT_SIZE, PROT_READ | PROT_WRITE,
MAP_SHARED, fd2, mmap_arg.offset) == MAP_FAILED);
igt_assert(errno == EACCES);
flink = gem_flink(fd, handle);
igt_assert(flink);
handle2 = gem_open(fd2, flink);
igt_assert(handle2);
/* Recheck that it works after flink. */
/* Check that the same offset on the other fd doesn't work. */
igt_assert(mmap64(0, OBJECT_SIZE, PROT_READ | PROT_WRITE,
MAP_SHARED, fd2, mmap_arg.offset));
}
static void
test_short(int fd)
{
struct drm_i915_gem_mmap_gtt mmap_arg;
int pages, p;
mmap_arg.handle = gem_create(fd, OBJECT_SIZE);
igt_assert(mmap_arg.handle);
igt_assert(drmIoctl(fd,
DRM_IOCTL_I915_GEM_MMAP_GTT,
&mmap_arg) == 0);
for (pages = 1; pages <= OBJECT_SIZE / PAGE_SIZE; pages <<= 1) {
uint8_t *r, *w;
w = mmap64(0, pages * PAGE_SIZE, PROT_READ | PROT_WRITE,
MAP_SHARED, fd, mmap_arg.offset);
igt_assert(w != MAP_FAILED);
r = mmap64(0, pages * PAGE_SIZE, PROT_READ,
MAP_SHARED, fd, mmap_arg.offset);
igt_assert(r != MAP_FAILED);
for (p = 0; p < pages; p++) {
w[p*PAGE_SIZE] = r[p*PAGE_SIZE];
w[p*PAGE_SIZE+(PAGE_SIZE-1)] =
r[p*PAGE_SIZE+(PAGE_SIZE-1)];
}
munmap(r, pages * PAGE_SIZE);
munmap(w, pages * PAGE_SIZE);
}
gem_close(fd, mmap_arg.handle);
}
/*
* map the object into both client and server at the same virtual address
*/
void *
mmap64_join(pid_t pid, void *addr, size_t len, int prot, int flags, int fd, off64_t off) {
void *svaddr, *cvaddr = MAP_FAILED;
uintptr_t hint = (uintptr_t)addr;
uintptr_t start_hint = hint;
if ( hint == 0 ) hint = (uintptr_t)CPU_VADDR_SERVER_HINT;
do {
svaddr = mmap64( (void *)hint, len, prot, flags, fd, off );
if ( svaddr == MAP_FAILED ) {
break;
}
if ( svaddr == cvaddr ) {
return svaddr;
}
cvaddr = mmap64_peer( pid, svaddr, len, prot, flags, fd, off );
if ( cvaddr == MAP_FAILED ) {
break;
}
if ( svaddr == cvaddr ) {
return svaddr;
}
if ( munmap( svaddr, len ) == -1 ) {
svaddr = MAP_FAILED;
break;
}
svaddr = mmap64( cvaddr, len, prot, flags, fd, off );
if ( svaddr == MAP_FAILED ) {
break;
}
if ( svaddr == cvaddr ) {
return svaddr;
}
if ( munmap( svaddr, len ) == -1 ) {
svaddr = MAP_FAILED;
break;
}
if ( munmap_peer( pid, cvaddr, len ) == -1 ) {
cvaddr = MAP_FAILED;
break;
}
hint += __PAGESIZE;
} while(hint != start_hint); /* do we really want to wrap all the way */
if ( svaddr != MAP_FAILED ) {
munmap( svaddr, len );
}
if ( cvaddr != MAP_FAILED ) {
munmap_peer( pid, cvaddr, len );
}
return MAP_FAILED;
}
int ShmTree::setShm(const char* shmName) {
unsigned int size = sizeof(MEM_BUF)+1024*1024*1024;
// create shared memory
if((m_iFd = shm_open(shmName, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR)) == -1) {
if(errno == EEXIST) {
struct stat sb;
if((m_iFd = shm_open(shmName, O_RDWR, 0)) == -1) {
perror("[pIPC] <IPCGet> shm_open");
return -1;
}
while (true) {
if (fstat(m_iFd, &sb) == -1) {
perror("fstat");
return -1;
}
if (sb.st_size != 0) {
break;
}
}
flock(m_iFd, LOCK_EX);
m_pBuf = (MEM_BUF *)mmap64(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, m_iFd, 0);
if(m_pBuf == MAP_FAILED) {
perror("[pIPC] <IPCGet> mmap64");
return -1;
}
printf("[pIPC] Shared memory is opened [name: %s] [size: %d bytes]\n", shmName, size);
flock(m_iFd, LOCK_UN);
} else {
perror("[pIPC] <IPCGet> shm_create");
return -1;
}
} else {
flock(m_iFd, LOCK_EX);
if (ftruncate64(m_iFd, size) == -1) {
perror("[pIPC] <IPCGet> ftruncate64");
return -1;
}
m_pBuf = (MEM_BUF *)mmap64(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, m_iFd, 0);
if(m_pBuf == MAP_FAILED) {
perror("[pIPC] <IPCGet> mmap64");
return -1;
}
printf("[pIPC] <IPCGet> Shared memory is created [name: %s] [size=%d bytes]\n", shmName, size);
flock(m_iFd, LOCK_UN);
}
return 0;
}
int
osal_mmap (osal_mmap_t **mm,
void **p,
osal_handle_t handle,
u_int64_t offset,
u_int32_t length)
{
*mm = osal_alloc (sizeof (osal_mmap_t));
if (*mm != NULL)
{
int align = offset % getpagesize ();
void *addr;
offset -= align;
length += align;
addr = mmap64 (NULL, length, PROT_READ, MAP_SHARED,
handle.desc, offset);
if (addr != MAP_FAILED)
{ /* success */
(*mm)->start = addr;
(*mm)->length = length;
*p = (u_int8_t*) addr + align;
return (OSAL_OK);
}
else
{ /* mmap failed */
osal_free (*mm), *mm = NULL;
return (OSAL_ERR);
}
}
else /* malloc failed */
return (OSAL_NO_MEM);
}
/*
* Map a file (from fd's current offset) into a private, read-only memory
* segment. The file offset must be a multiple of the page size.
*
* On success, returns 0 and fills out "pMap". On failure, returns a nonzero
* value and does not disturb "pMap".
*/
static int sysMapFD(int fd, MemMapping* pMap)
{
loff_t start;
size_t length;
void* memPtr;
assert(pMap != NULL);
if (getFileStartAndLength(fd, &start, &length) < 0)
return -1;
memPtr = mmap64(NULL, length, PROT_READ, MAP_PRIVATE, fd, start);
if (memPtr == MAP_FAILED) {
LOGW("mmap(%d, R, PRIVATE, %d, %d) failed: %s\n", (int) length,
fd, (int) start, strerror(errno));
return -1;
}
pMap->addr = memPtr;
pMap->length = length;
pMap->range_count = 1;
pMap->ranges = malloc(sizeof(MappedRange));
pMap->ranges[0].addr = memPtr;
pMap->ranges[0].length = length;
return 0;
}
void _mmap_page(enum dex_sect_id id, uint idx)
{
struct dex_section_s *s = &dex_section[id];
u64 offs = 0;
uint o_align = 0;
if (s->mmap_page)
munmap(s->mmap_page, s->cur_size);
if (idx > s->nof_entries)
dub_die("Dex paging fault. Idx %u > %u.", idx, s->nof_entries);
offs = s->toc[idx].offs + s->sect_offs;
o_align = offs & (getpagesize() - 1);
s->first_item = idx;
s->cur_offs = s->toc[idx].offs;
s->last_item = find_last(s, idx);
/* +4096 tries to make sure that our slack bit-twidling routines
* in pcode handling can't cause a segmentation fault */
s->cur_size = s->toc[s->last_item + 1].offs - s->cur_offs
+ o_align + 4096;
s->mmap_page = mmap64(0, s->cur_size, PROT_READ, MAP_SHARED,
s->sect_fd, offs - o_align);
if (s->mmap_page == MAP_FAILED)
dub_sysdie("Couldn't mmap page (offs: %llu size: %llu)",
offs - o_align, s->cur_size);
s->cur_start = s->mmap_page + o_align;
}
void open_index_i(const char *name, uint psize)
{
uint i, fd = 0;
page_size = psize;
if ((fd = open(name, O_RDONLY | O_LARGEFILE, 0)) == -1)
dub_sysdie("Couldn't open index %s", name);
read(fd, (struct header_s*)&dex_header, sizeof(struct header_s));
dex_base_size = dex_header.data_offs[0];
dex_base_addr = mmap64(0, dex_base_size, PROT_READ, MAP_SHARED, fd, 0);
if (dex_base_addr == MAP_FAILED)
dub_sysdie("Couldn't map TOCs in %s", name);
memset(dex_section, 0, DEX_NOF_SECT * sizeof(struct dex_section_s));
for (i = 0; i < DEX_NOF_SECT; i++){
dex_section[i].sect_fd = fd;
dex_section[i].sect_offs = dex_header.data_offs[i];
dex_section[i].toc = dex_base_addr +
dex_header.toc_offs[i];
if (i == DEX_NOF_SECT - 1)
dex_section[i].nof_entries =
(dex_header.data_offs[0]
- dex_header.toc_offs[i]) / sizeof(toc_e) - 1;
else{
dex_section[i].nof_entries =
(dex_header.toc_offs[i + 1] -
dex_header.toc_offs[i]) / sizeof(toc_e) - 1;
}
}
}
static int bd_mmap_cmd_submit(struct tgt_device *dev, int rw, uint32_t datalen,
unsigned long *uaddr, uint64_t offset, int *async,
void *key)
{
int fd = dev->fd;
void *p;
int err = 0;
if (*uaddr)
*uaddr = *uaddr + offset;
else {
p = mmap64(NULL, pgcnt(datalen, offset) << PAGE_SHIFT,
PROT_READ | PROT_WRITE, MAP_SHARED, fd,
offset & ~((1ULL << PAGE_SHIFT) - 1));
*uaddr = (unsigned long) p + (offset & ~PAGE_MASK);
if (p == MAP_FAILED) {
err = -EINVAL;
eprintf("%lx %u %" PRIu64 "\n", *uaddr, datalen, offset);
}
}
printf("%lx %u %" PRIu64 "\n", *uaddr, datalen, offset);
return err;
}
int __init can_drop_memory(void)
{
void *addr;
int fd, ok = 0;
printk("Checking host MADV_REMOVE support...");
fd = create_mem_file(UM_KERN_PAGE_SIZE);
if(fd < 0){
printk("Creating test memory file failed, err = %d\n", -fd);
goto out;
}
addr = mmap64(NULL, UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE,
MAP_SHARED, fd, 0);
if(addr == MAP_FAILED){
printk("Mapping test memory file failed, err = %d\n", -errno);
goto out_close;
}
if(madvise(addr, UM_KERN_PAGE_SIZE, MADV_REMOVE) != 0){
printk("MADV_REMOVE failed, err = %d\n", -errno);
goto out_unmap;
}
printk("OK\n");
ok = 1;
out_unmap:
munmap(addr, UM_KERN_PAGE_SIZE);
out_close:
close(fd);
out:
return ok;
}
/* To prepare for enlargements of the mmaped area reserve some address
space. On some machines, being a file mapping rather than an anonymous
mapping affects the address selection. So do this mapping from the
actual file, even though it's only a dummy to reserve address space. */
static void *
prepare_address_space (int fd, size_t total, size_t *reserved, int *xflags,
void **mmap_base, size_t *mmap_len)
{
if (total < RESERVE_MMAP_SIZE)
{
void *p = mmap64 (NULL, RESERVE_MMAP_SIZE, PROT_NONE, MAP_SHARED, fd, 0);
if (p != MAP_FAILED)
{
void *aligned_p = PTR_ALIGN_UP (p, MAP_FIXED_ALIGNMENT);
size_t align_adjust = aligned_p - p;
*mmap_base = p;
*mmap_len = RESERVE_MMAP_SIZE;
assert (align_adjust < RESERVE_MMAP_SIZE);
*reserved = RESERVE_MMAP_SIZE - align_adjust;
*xflags = MAP_FIXED;
return aligned_p;
}
}
*reserved = total;
*xflags = 0;
*mmap_base = NULL;
*mmap_len = 0;
return NULL;
}
/*********************************************
SkypeOpenFile(): Memory map a file.
This sets the globals.
*********************************************/
void SkypeOpenFile (char *Filename)
{
mystat Stat;
/* block re-opens */
SkypeCloseFile();
/* Open file */
FileIn = open(Filename,O_RDONLY|O_LARGEFILE);
if (FileIn == -1)
{
fprintf(stderr,"ERROR: Unable to open file (%s)\n",Filename);
exit(-1);
}
if (fstat64(FileIn,&Stat) == -1)
{
fprintf(stderr,"ERROR: Unable to stat file (%s)\n",Filename);
close(FileIn);
exit(-1);
}
MemorySize=Stat.st_size;
if (MemorySize > 0)
{
Memory=mmap64(0,MemorySize,PROT_READ,MAP_PRIVATE,FileIn,0);
if (Memory == MAP_FAILED)
{
fprintf(stderr,"ERROR: Unable to mmap file (%s)\n",Filename);
close(FileIn);
exit(-1);
}
}
} /* SkypeOpenFile() */
static bool
file_data_available_p (struct locarhandle *ah, uint32_t offset, uint32_t size)
{
if (offset < ah->mmaped && offset + size <= ah->mmaped)
return true;
struct stat64 st;
if (fstat64 (ah->fd, &st) != 0)
return false;
if (st.st_size > ah->reserved)
return false;
const size_t pagesz = getpagesize ();
size_t start = ah->mmaped & ~(pagesz - 1);
void *p = mmap64 (ah->addr + start, st.st_size - start,
PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED,
ah->fd, start);
if (p == MAP_FAILED)
{
ah->mmaped = start;
return false;
}
ah->mmaped = st.st_size;
return true;
}
static datastore_descriptor do_mmap(long block_size, long num_blocks, char* filename){
int i;
// If it isn't inited, let's fill in the table with empty entries
if (!xordatastoreinited) {
// start the table as entry
for (i=0; i<STARTING_XORDATASTORE_TABLESIZE; i++) {
xordatastoretable[i].numberofblocks = 0;
xordatastoretable[i].sizeofablock = 0;
xordatastoretable[i].datastore = NULL;
}
// We've initted now!
xordatastoreinited = 1;
}
for (i=0; i<xordatastorestablesize; i++) {
// Look for an empty entry
if (!is_table_entry_used(i)) {
xordatastoretable[i].numberofblocks = num_blocks;
xordatastoretable[i].sizeofablock = block_size;
int dbfd = open(filename, O_RDONLY, 0);
if (dbfd < 0){
printf("error opening db %s!\n", filename);
exit(1);
}
xordatastoretable[i].datastore = (__m128i *) mmap64(NULL, num_blocks * block_size, PROT_READ, MAP_SHARED, dbfd, 0);
if (xordatastoretable[i].datastore == MAP_FAILED) {
printf("mmap failed!\n");
exit(1);
}
// we can close dbfd here already, mmap still works fine
close(dbfd);
// check for valid header
if (strncmp((char*) xordatastoretable[i].datastore, "RAIDPIRDB_v0.9.5", 16) != 0){
printf("%s is not a valid RAID-PIR db!\n", filename);
exit(1);
}
// skip header, if it was correct
xordatastoretable[i].datastore++;
return i;
}
}
// The table is full! I should expand it...
printf("Internal Error: I need to expand the table size (unimplemented)\n");
return -1;
}
/**********************************************
SumOpenFile(): Open and mmap a file.
Returns structure, or NULL on failure.
**********************************************/
CksumFile * SumOpenFile (char *Fname)
{
CksumFile *CF;
struct stat64 Stat;
CF=(CksumFile *)calloc(1,sizeof(CksumFile));
if (!CF) return(NULL);
/* open the file (memory map) */
#ifdef O_LARGEFILE
CF->FileHandle = open(Fname,O_RDONLY|O_LARGEFILE);
#else
/** BSD does not need nor use O_LARGEFILE **/
CF->FileHandle = open(Fname,O_RDONLY);
#endif
if (CF->FileHandle == -1)
{
fprintf(stderr,"ERROR: Unable to open file (%s)\n",Fname);
free(CF);
return(NULL);
}
if (fstat64(CF->FileHandle,&Stat) == -1)
{
fprintf(stderr,"ERROR: Unable to stat file (%s)\n",Fname);
close(CF->FileHandle);
free(CF);
return(NULL);
}
CF->MmapSize = Stat.st_size;
CF->MmapOffset = 0;
/* reject files that are too long */
if (CF->MmapSize >= (uint32_t)(-1))
{
close(CF->FileHandle);
free(CF);
return(NULL);
}
if (CF->MmapSize > 0)
{
CF->Mmap = mmap64(0,CF->MmapSize,PROT_READ,MAP_PRIVATE,CF->FileHandle,0);
if (CF->Mmap == MAP_FAILED)
{
fprintf(stderr,"ERROR: Unable to mmap file (%s)\n",Fname);
close(CF->FileHandle);
free(CF);
return(NULL);
}
}
return(CF);
} /* SumOpenFile() */
/*
* In order to mmap a section from the ELF file, we must round down sh_offset
* to the previous page boundary, and mmap the surrounding page. We store
* the pointer to the start of the actual section data back into sp->cts_data.
*/
const void *
ctf_sect_mmap(ctf_sect_t *sp, int fd)
{
size_t pageoff = sp->cts_offset & ~_PAGEMASK;
caddr_t base = mmap64(NULL, sp->cts_size + pageoff, PROT_READ,
MAP_PRIVATE, fd, sp->cts_offset & _PAGEMASK);
if (base != MAP_FAILED)
sp->cts_data = base + pageoff;
return (base);
}
int main(int argc, char* argv[])
{
int fd = open(argv[0], O_RDONLY);
if (fd == -1) return 0;
struct stat fs;
fstat(fd, &fs);
void* ptr = mmap64(NULL, fs.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (ptr != MAP_FAILED) {
munmap(ptr, fs.st_size);
}
close(fd);
return 0;
}
int os_map_memory(void *virt, int fd, unsigned long long off, unsigned long len,
int r, int w, int x)
{
void *loc;
int prot;
prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) |
(x ? PROT_EXEC : 0);
loc = mmap64((void *) virt, len, prot, MAP_SHARED | MAP_FIXED,
fd, off);
if (loc == MAP_FAILED)
return -errno;
return 0;
}
/*---------------------------------------------------------------------------*/
void *malloc_huge_pages(size_t size)
{
int retval;
size_t real_size;
void *ptr = NULL;
if (disable_huge_pages) {
int page_size = sysconf(_SC_PAGESIZE);
real_size = ALIGN(size, page_size);
retval = posix_memalign(&ptr, page_size, real_size);
if (retval) {
ERROR_LOG("posix_memalign failed sz:%zu. %s\n",
real_size, strerror(retval));
return NULL;
}
return ptr;
}
/* Use 1 extra page to store allocation metadata */
/* (libhugetlbfs is more efficient in this regard) */
real_size = ALIGN(size + HUGE_PAGE_SZ, HUGE_PAGE_SZ);
ptr = mmap64(NULL, real_size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS |
MAP_POPULATE | MAP_HUGETLB, -1, 0);
if (ptr == MAP_FAILED) {
/* The mmap() call failed. Try to malloc instead */
int page_size = sysconf(_SC_PAGESIZE);
WARN_LOG("mmap64 rdma pool sz:%zu failed (errno=%d %m)\n",
real_size, errno);
real_size = ALIGN(size + HUGE_PAGE_SZ, page_size);
retval = posix_memalign(&ptr, page_size, real_size);
if (retval) {
ERROR_LOG("posix_memalign failed sz:%zu. %s\n",
real_size, strerror(retval));
return NULL;
}
real_size = 0;
} else {
DEBUG_LOG("Allocated huge page sz:%zu\n", real_size);
}
/* Save real_size since mmunmap() requires a size parameter */
*((size_t *)ptr) = real_size;
/* Skip the page with metadata */
return ptr + HUGE_PAGE_SZ;
}
int write_fd_chunk(struct output_file *out, unsigned int len,
int fd, int64_t offset)
{
int ret;
int64_t aligned_offset;
int aligned_diff;
int buffer_size;
char *ptr;
aligned_offset = offset & ~(4096 - 1);
aligned_diff = offset - aligned_offset;
buffer_size = len + aligned_diff;
#ifndef USE_MINGW
char *data = mmap64(NULL, buffer_size, PROT_READ, MAP_SHARED, fd,
aligned_offset);
if (data == MAP_FAILED) {
return -errno;
}
ptr = data + aligned_diff;
#else
off64_t pos;
char *data = malloc(len);
if (!data) {
return -errno;
}
pos = lseek64(fd, offset, SEEK_SET);
if (pos < 0) {
return -errno;
}
ret = read_all(fd, data, len);
if (ret < 0) {
return ret;
}
ptr = data;
#endif
ret = out->sparse_ops->write_data_chunk(out, len, ptr);
#ifndef USE_MINGW
munmap(data, buffer_size);
#else
free(data);
#endif
return ret;
}
int main(int argc, char **argv)
{
int fd, fd1, ret;
char *buf;
char wbuf[8192];
unsigned long long offset = 0xffffff000ULL;
char *p=wbuf;
fd = open(FILENAME, O_RDWR|O_CREAT|O_LARGEFILE/*|O_TRUNC*/, 0644);
if (fd < 0) {
perror(FILENAME);
return -1;
}
ftruncate64(fd, offset + 4096*4);
buf = mmap64(NULL, 4096*4, PROT_READ|PROT_WRITE, MAP_SHARED, fd, offset);
if (buf == MAP_FAILED) {
perror("mmap");
return -1;
}
fd1 = open(FILENAME, O_RDWR|O_DIRECT|O_LARGEFILE, 0644);
if (fd < 0) {
perror(FILENAME);
return -1;
}
p = (char *)((unsigned long) p | 4095)+1;
if (fork()) {
while(1) {
/* map in the page */
buf[10] = 1;
}
} else {
ret = pwrite64(fd1, p, 4096, offset);
if (ret < 4096) {
printf("write: %d %p\n", ret, p);
perror("write");
return -1;
}
}
return 0;
}
buffered_reader::buffered_reader(int cur_fd, int cur_block_size)
{
#ifdef USE_MMAP
struct stat64 finfo;
#endif
fd = cur_fd;
block_size = cur_block_size;
buffer = NULL;
buffer_length = buffer_pointer = 0;
mmap_addr = NULL;
/* try do mmap */
#ifdef USE_MMAP
if (fstat64(cur_fd, &finfo) == 0)
{
if (!S_ISFIFO(finfo.st_mode))
{
/* mmap */
size_of_file = finfo.st_size;
cur_offset = mmap_addr = (char *)mmap64(NULL, size_of_file, PROT_READ, MAP_SHARED, cur_fd, 0);
if (!mmap_addr)
{
fprintf(stderr, "mmap64 failed: %d/%s\n", errno, strerror(errno));
}
/* advise the kernel how to treat the mmaped region */
/* FIXME: change to madvise64 as soon as it comes available */
(void)madvise(mmap_addr, size_of_file, MADV_SEQUENTIAL);
// fprintf(stderr, "*using mmap*\n");
}
}
else
{
fprintf(stderr, "Error obtaining information on fd %d: %d/%s\n", cur_fd, errno, strerror(errno));
}
#endif
if (!mmap_addr)
{
#if (_XOPEN_VERSION >= 600)
(void)posix_fadvise(cur_fd, 0, 0, POSIX_FADV_SEQUENTIAL); // or POSIX_FADV_NOREUSE?
#endif
}
}
void open_section_i(const char *basename,
enum dex_sect_id sect, uint iblock_no)
{
int toc_fd = 0;
int data_fd = 0;
off64_t fpos = 0;
char *dname = NULL;
char *tname = NULL;
PPARM_INT(page_size, VM_PAGE_SIZE);
asprintf(&dname, "%s.%u.sect", basename, iblock_no);
asprintf(&tname, "%s.%u.toc.sect", basename, iblock_no);
if ((data_fd = open(dname, O_RDONLY | O_LARGEFILE, 0)) == -1)
dub_sysdie("Couldn't open section %s", dname);
if ((toc_fd = open(tname, O_RDONLY)) == -1)
dub_sysdie("Couldn't open toc %s", tname);
memset(&dex_section[sect], 0, sizeof(struct dex_section_s));
dex_section[sect].sect_fd = data_fd;
dex_section[sect].sect_offs = 0;
if ((fpos = lseek64(toc_fd, 0, SEEK_END)) == (off64_t)-1)
dub_sysdie("Couldn't seek toc %s", tname);
dex_section[sect].nof_entries = fpos / sizeof(toc_e) - 1;
if (!dex_section[sect].nof_entries)
dub_die("TOC %s empty.", tname);
dub_dbg("Mmapping %u bytes of toc.", fpos);
dex_section[sect].toc = mmap64(0, fpos, PROT_READ,
MAP_SHARED, toc_fd, 0);
if (dex_section[sect].toc == MAP_FAILED)
dub_sysdie("Couldn't mmap toc %s", tname);
free(dname);
free(tname);
}
/*
* Frees up memory mapped file region of supplied size. The
* file descriptor "fd" indicates which memory mapped file.
* If successful, returns 0. Otherwise returns -1 if "size"
* is zero, or -1 times the number of times msync() failed.
*/
static int
fileset_freemem(int fd, off64_t size)
{
off64_t left;
int ret = 0;
for (left = size; left > 0; left -= MMAP_SIZE) {
off64_t thismapsize;
caddr_t addr;
thismapsize = MIN(MMAP_SIZE, left);
addr = mmap64(0, thismapsize, PROT_READ|PROT_WRITE,
MAP_SHARED, fd, size - left);
ret += msync(addr, thismapsize, MS_INVALIDATE);
(void) munmap(addr, thismapsize);
}
return (ret);
}
/* To prepare for enlargements of the mmaped area reserve some address
space. On some machines, being a file mapping rather than an anonymous
mapping affects the address selection. So do this mapping from the
actual file, even though it's only a dummy to reserve address space. */
static void *
prepare_address_space (int fd, size_t total, size_t *reserved, int *xflags)
{
if (total < RESERVE_MMAP_SIZE)
{
void *p = mmap64 (NULL, RESERVE_MMAP_SIZE, PROT_NONE, MAP_SHARED, fd, 0);
if (p != MAP_FAILED)
{
*reserved = RESERVE_MMAP_SIZE;
*xflags = MAP_FIXED;
return p;
}
}
*reserved = total;
*xflags = 0;
return NULL;
}
int main(int argc, char **argv)
{
#ifdef __UCLIBC_HAS_LFS__
void *ptr;
ptr = mmap64(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
if (ptr == MAP_FAILED) {
perror("mmap");
exit(1);
}
printf("mmap returned %p\n", ptr);
exit(0);
#else
exit(0);
#endif
}
mmfile::mmfile(const std::string& filename)
{
file_handle_ = open64(filename.c_str(),
O_RDWR, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if (file_handle_ == -1)
return;
struct stat64 sbuf;
if (fstat64(file_handle_, &sbuf) == -1)
return;
size_ = (long long)sbuf.st_size;
// You can static_cast void* pointers.
data_ = static_cast<uint8_t*>(mmap64(
0, size_, PROT_READ | PROT_WRITE, MAP_SHARED, file_handle_, 0));
if (data_ == MAP_FAILED)
data_ = nullptr;
// mmap opens its own file handle.
close(file_handle_);
}
/*
* Create a protection domain
*/
int
usd_ib_cmd_alloc_pd(
struct usd_device *dev,
uint32_t *handle_o)
{
uint32_t vfid = 0;
uint32_t grp_vect_buf_len = 0;
int err;
/* Issue IB alloc_pd command, get assigned VF id and group vector size */
err = _usd_ib_cmd_alloc_pd(dev, handle_o, &vfid, &grp_vect_buf_len);
if (err) {
return err;
}
/* MAP group vector address to userspace
* Kernel module then maps group vector user address to IOMMU and
* program VIC HW register
*/
if (dev->ud_ctx->ucx_caps[USD_CAP_GRP_INTR] > 0) {
void *va;
off64_t offset;
offset = USNIC_ENCODE_PGOFF(vfid, USNIC_MMAP_GRPVECT, 0);
va = mmap64(NULL, grp_vect_buf_len, PROT_READ + PROT_WRITE,
MAP_SHARED, dev->ud_ctx->ucx_ib_dev_fd, offset);
if (va == MAP_FAILED) {
usd_err("Failed to map group vector for vf %u, grp_vect_size %u, "
"error %d\n",
vfid, grp_vect_buf_len, errno);
_usd_ib_cmd_dealloc_pd(dev, *handle_o);
return -errno;
}
dev->grp_vect_map.va = va;
dev->grp_vect_map.len = grp_vect_buf_len;
dev->grp_vect_map.vfid = vfid;
}
return 0;
}
int MapBuffer(IBuffer *ibuffer, void **ptr)
{
if ((!ibuffer) || (!ibuffer->handle)) {
return GI_ERROR;
}
struct drm_mode_map_dumb req;
memset(&req, 0, sizeof(req));
req.handle = ibuffer->handle;
if (ioctl(ibuffer->fd, DRM_IOCTL_MODE_MAP_DUMB, &req)) {
return GI_ERROR;
}
void *data = NULL;
if (!(data = mmap64(NULL, ibuffer->size, PROT_READ|PROT_WRITE, MAP_SHARED, ibuffer->fd, req.offset))) {
return GI_ERROR;
}
(*ptr) = data;
return GI_SUCCESS;
}
main(int argc, char * argv[])
{
int i;
for (i=0; i<512; i++) junk[i]=-1;
if ((progname = strrchr(argv[0], '/')) == NULL)
progname = argv[0];
else
progname++;
if (argc < 2) {
fprintf(stderr,"Usage: %s filename\n", progname);
exit(1);
}
fd = open(argv[1], O_RDWR|O_CREAT, 0644);
if (fd < 0) {
fprintf(stderr,"%s: cannot open %s\n", progname, argv[1]);
perror(argv[1]);
exit(3);
}
ptr = mmap64(NULL, (size_t)(0x10000000), PROT_WRITE, MAP_SHARED|MAP_AUTOGROW, fd, 0);
if (ptr == MAP_FAILED) {
fprintf(stderr,"%s: cannot mmap64 %s\n", progname, argv[1]);
perror(argv[1]);
exit(3);
}
for(counter=0; ; counter++) {
junk[0] = counter;
bcopy(junk, ptr, sizeof(junk));
ptr+=sizeof(junk);
}
printf("%s complete.\n", progname);
return 0;
}