off_t write_to_swap(vaddr_t page,off_t offset)
{
struct uio uio ;
struct iovec iovec ;
if(offset == -1){
//lock_acquire(file_lock);
uio_kinit(&iovec,&uio,(void * )page,PAGE_SIZE,global_offset,UIO_WRITE);
}
else
uio_kinit(&iovec,&uio,(void * )page,PAGE_SIZE,offset,UIO_WRITE);
int result=VOP_WRITE(swap_file,&uio);
if(result)
{
panic("write_to_file : VOP_WRITE failed\n");
}
if(offset == -1){
global_offset = global_offset + PAGE_SIZE ;
return global_offset - PAGE_SIZE ;
}
else{
return offset;
}
}
char* read_seg_from_swap(vaddr_t vaddr){
kprintf("About to read segment from swap. given vaddress: %lu \n", (unsigned long)vaddr);
char buf[SEG_SZ];
struct iovec iov;
struct uio u;
int i, result, segNum= -1;
for(i=0;i<TABLE_SZ;i++){
if(addrptr[i]!=-1 && vaddr>=addrptr[i] && vaddr<addrptr[i]+SEG_SZ){
segNum = i;
}
}
if(segNum==-1){}//kprintf("segment not found\n");}
else kprintf("found seg no %d \n",segNum);
u.uio_iovcnt = 1;
u.uio_resid = SEG_SZ; // amount to read from the file
u.uio_offset = offset[segNum];
//u.uio_segflg = is_executable ? UIO_USERISPACE : UIO_USERSPACE;
u.uio_rw = UIO_READ;
u.uio_space = curthread->t_addrspace;
uio_kinit(&iov, &u, buf, SEG_SZ, 0, UIO_READ);
result = VOP_READ(swap_file, &u);
return buf;
}
/*
* Read the directory entry out of slot SLOT of a directory vnode.
* The "slot" is the index of the directory entry, starting at 0.
*/
static
int
sfs_readdir(struct sfs_vnode *sv, struct sfs_dir *sd, int slot)
{
struct iovec iov;
struct uio ku;
off_t actualpos;
int result;
/* Compute the actual position in the directory to read. */
actualpos = slot * sizeof(struct sfs_dir);
/* Set up a uio to do the read */
uio_kinit(&iov, &ku, sd, sizeof(struct sfs_dir), actualpos, UIO_READ);
/* do it */
result = sfs_io(sv, &ku);
if (result) {
return result;
}
/* We should not hit EOF in the middle of a directory entry */
if (ku.uio_resid > 0) {
panic("sfs: readdir: Short entry (inode %u)\n", sv->sv_ino);
}
/* Done */
return 0;
}
void write_seg_to_swap(char* buf, vaddr_t vaddr){
struct iovec iov;
struct uio u;
int i, result, segNum = -1;
for(i=0;i<TABLE_SZ;i++){
if(addrptr[i]!=-1 && vaddr>=addrptr[i] && vaddr<addrptr[i]+SEG_SZ){
segNum = i;
}
}
if(segNum==-1){kprintf("segment not found\n");}
u.uio_iovcnt = 1;
u.uio_resid = SEG_SZ; // amount to read from the file
u.uio_offset = offset[segNum];
//u.uio_segflg = is_executable ? UIO_USERISPACE : UIO_USERSPACE;
u.uio_rw = UIO_READ;
u.uio_space = curthread->t_addrspace;
uio_kinit(&iov, &u, buf, SEG_SZ, 0, UIO_WRITE);
result = VOP_WRITE(swap_file, &u);
return buf;
}
/*
* Write (overwrite) the directory entry in slot SLOT of a directory
* vnode.
*/
static
int
sfs_writedir(struct sfs_vnode *sv, struct sfs_dir *sd, int slot)
{
struct iovec iov;
struct uio ku;
off_t actualpos;
int result;
/* Compute the actual position in the directory. */
KASSERT(slot>=0);
actualpos = slot * sizeof(struct sfs_dir);
/* Set up a uio to do the write */
uio_kinit(&iov, &ku, sd, sizeof(struct sfs_dir), actualpos, UIO_WRITE);
/* do it */
result = sfs_io(sv, &ku);
if (result) {
return result;
}
/* Should not end up with a partial entry! */
if (ku.uio_resid > 0) {
panic("sfs: writedir: Short write (ino %u)\n", sv->sv_ino);
}
/* Done */
return 0;
}
/*
* Command for printing the current directory.
*/
static
int
cmd_pwd(int nargs, char **args)
{
char buf[PATH_MAX+1];
int result;
struct iovec iov;
struct uio ku;
(void)nargs;
(void)args;
uio_kinit(&iov, &ku, buf, sizeof(buf)-1, 0, UIO_READ);
result = vfs_getcwd(&ku);
if (result) {
kprintf("vfs_getcwd failed (%s)\n", strerror(result));
return result;
}
/* null terminate */
buf[sizeof(buf)-1-ku.uio_resid] = 0;
/* print it */
kprintf("%s\n", buf);
return 0;
}
int write(int fd, const void *buf, size_t nbytes, ssize_t *ret)
{
if (fd < 0 || fd > INT_MAX)
{
return EBADF;
}
if (buf == NULL)
{
return EFAULT;
}
if(fd < 2){
curproc->rt = INTERACTIVE_K;
}
int err = 0;
lock_acquire(glbl_mngr->file_sys_lk);
open_file *f = file_list_get(curproc->open_files, fd);
lock_release(glbl_mngr->file_sys_lk);
if(f == NULL)
{
return EBADF;
}
else{
if(f->flags & O_RDONLY)
{
return EBADF;
}
else{
lock_acquire(f->file_lk);
struct uio write_uio;
struct iovec iov;
uio_kinit(&iov,
&write_uio,
(void*)buf,
nbytes,
f->offset,
UIO_WRITE);
write_uio.uio_segflg = UIO_USERSPACE;
write_uio.uio_space = curproc->p_addrspace;
write_uio.uio_resid = nbytes;
while(!err && write_uio.uio_resid)
{
err = VOP_WRITE(f->vfile,&write_uio);
//err = f->vfile->vn_ops->vop_write(f->vfile, &write_uio);
*ret = nbytes - write_uio.uio_resid;
f->offset = write_uio.uio_offset;
}
lock_release(f->file_lk);
}
open_file_decref(f);
}
return err;
}
int read_from_disk(vaddr_t page,off_t offset)
{
struct uio uio ;
struct iovec iovec;
uio_kinit(&iovec,&uio,(void *)page,PAGE_SIZE,offset,UIO_READ);
int result = VOP_READ(swap_file,&uio);
if(result)
{
return result;
}
return 0 ;
}
int
read_page(void* kbuf, off_t sw_offset){
struct iovec iovectr;
struct uio uiovar;
KASSERT(sw_vn != NULL);
uio_kinit(&iovectr, &uiovar, kbuf, PAGE_SIZE, sw_offset, UIO_READ);
spinlock_release(&cm_lock);
int ret = VOP_READ(sw_vn, &uiovar);
spinlock_acquire(&cm_lock);
if(ret){
return ret;
}
return 0;
}
int
__getcwd(userptr_t buf, size_t buflen,int *err)
{
char path[PATH_MAX];
struct iovec iov;
struct uio uio;
uio_kinit(&iov,&uio,path,PATH_MAX,0,UIO_READ);
*err = vfs_getcwd(&uio);
if (*err)
{
return -1;
}
*err = copyout((userptr_t)path,buf,buflen);
if (*err)
{
return -1;
}
return uio.uio_offset;
}
/*
* swap_io: Does one swap I/O. Panics on failure.
*
* Synchronization: none specifically. The physical page should be
* marked "pinned" (locked) so it won't be touched by other people.
*/
static
void
swap_io(paddr_t pa, off_t swapaddr, enum uio_rw rw)
{
struct iovec iov;
struct uio u;
vaddr_t va;
int result;
KASSERT(lock_do_i_hold(global_paging_lock));
KASSERT(pa != INVALID_PADDR);
KASSERT(swapaddr % PAGE_SIZE == 0);
KASSERT(coremap_pageispinned(pa));
KASSERT(bitmap_isset(swapmap, swapaddr / PAGE_SIZE));
va = coremap_map_swap_page(pa);
uio_kinit(&iov, &u, (char *)va, PAGE_SIZE, swapaddr, rw);
if (rw==UIO_READ) {
result = VOP_READ(swapstore, &u);
}
else {
result = VOP_WRITE(swapstore, &u);
}
coremap_unmap_swap_page(va, pa);
if (result==EIO) {
panic("swap: EIO on swapfile (offset %ld)\n",
(long)swapaddr);
}
else if (result==EINVAL) {
panic("swap: EINVAL from swapfile (offset %ld)\n",
(long)swapaddr);
}
else if (result) {
panic("swap: Error %d from swapfile (offset %ld)\n",
result, (long)swapaddr);
}
}
/* __getcwd() function handler */
int sys_getcwd(userptr_t buf, int * retval){
struct uio user;
struct iovec iov;
uio_kinit(&iov, &user, buf, BUF_SIZE, 0, UIO_READ);
user.uio_segflg = UIO_USERSPACE;
user.uio_space = curthread->t_addrspace;
if (buf == NULL || buf == (void *) 0x40000000 || buf == (void *) 0x80000000) {
return EFAULT;
}
int err;
if ((err = vfs_getcwd(&user) != 0)){
return err;
}
*retval = BUF_SIZE - user.uio_resid;
return 0;
}
int _write(int filehandle,void *buf, size_t size,int* retval){
if(filehandle < 0 || filehandle > MAX_FILE_FILETAB){
*retval = -1;
return EBADF;
}
if(curthread->fdesc[filehandle] == NULL)
{
*retval = -1;
return EBADF;
}
if(! (curthread->fdesc[filehandle]->flags != O_WRONLY || curthread->fdesc[filehandle]->flags!=O_RDWR) )
{
*retval = -1;
return EINVAL;
}
lock_acquire(curthread->fdesc[filehandle]->f_lock);
struct uio writeuio;
struct iovec iov;
size_t size1;
char *buffer = (char*)kmalloc(size);
copyinstr((userptr_t)buf,buffer,strlen(buffer),&size1);
uio_kinit(&iov, &writeuio, (void*) buffer, size, curthread->fdesc[filehandle]->offset, UIO_WRITE);
int result=VOP_WRITE(curthread->fdesc[filehandle]->vnode, &writeuio);
if (result) {
kfree(buffer);
lock_release(curthread->fdesc[filehandle]->f_lock);
*retval = -1;
return result;
}
curthread->fdesc[filehandle]->offset = writeuio.uio_offset;
*retval = size - writeuio.uio_resid;
kfree(buffer);
lock_release(curthread->fdesc[filehandle]->f_lock);
return 0;
}
int
write_page(void* kbuf, off_t* newoffset, int index){
(void)index;
struct iovec iovectr;
struct uio uiovar;
off_t offset;
KASSERT(sw_vn != NULL);
offset = index * PAGE_SIZE;
uio_kinit(&iovectr, &uiovar, kbuf, PAGE_SIZE, offset, UIO_WRITE);
spinlock_release(&cm_lock);
int ret = VOP_WRITE(sw_vn, &uiovar);
spinlock_acquire(&cm_lock);
if(ret){
return 1;
}
*newoffset = offset;
return 0;
}
static
void
swap_io( paddr_t paddr, off_t offset, enum uio_rw op ) {
struct iovec iov;
struct uio uio;
vaddr_t vaddr;
int res;
KASSERT( lock_do_i_hold( giant_paging_lock ) );
KASSERT( curthread->t_vmp_count == 0 || curthread->t_clone );
//get the virtual address.
vaddr = PADDR_TO_KVADDR( paddr );
//init the uio request.
uio_kinit( &iov, &uio, (char *)vaddr, PAGE_SIZE, offset, op );
//perform the request.
res = (op == UIO_READ) ? VOP_READ( vn_sw, &uio ) : VOP_WRITE( vn_sw, &uio );
//if we have a problem ... bail.
if( res )
panic( "swap_io: failed to perform a VOP." );
}
/*
* Load an ELF executable user program into the current address space.
*
* Returns the entry point (initial PC) for the program in ENTRYPOINT.
*/
int
load_elf(struct vnode *v, vaddr_t *entrypoint)
{
Elf_Ehdr eh; /* Executable header */
Elf_Phdr ph; /* "Program header" = segment header */
int result, i;
struct iovec iov;
struct uio ku;
struct addrspace *as;
as = curproc_getas();
/*
* Read the executable header from offset 0 in the file.
*/
uio_kinit(&iov, &ku, &eh, sizeof(eh), 0, UIO_READ);
result = VOP_READ(v, &ku);
if (result) {
return result;
}
if (ku.uio_resid != 0) {
/* short read; problem with executable? */
kprintf("ELF: short read on header - file truncated?\n");
return ENOEXEC;
}
/*
* Check to make sure it's a 32-bit ELF-version-1 executable
* for our processor type. If it's not, we can't run it.
*
* Ignore EI_OSABI and EI_ABIVERSION - properly, we should
* define our own, but that would require tinkering with the
* linker to have it emit our magic numbers instead of the
* default ones. (If the linker even supports these fields,
* which were not in the original elf spec.)
*/
if (eh.e_ident[EI_MAG0] != ELFMAG0 ||
eh.e_ident[EI_MAG1] != ELFMAG1 ||
eh.e_ident[EI_MAG2] != ELFMAG2 ||
eh.e_ident[EI_MAG3] != ELFMAG3 ||
eh.e_ident[EI_CLASS] != ELFCLASS32 ||
eh.e_ident[EI_DATA] != ELFDATA2MSB ||
eh.e_ident[EI_VERSION] != EV_CURRENT ||
eh.e_version != EV_CURRENT ||
eh.e_type!=ET_EXEC ||
eh.e_machine!=EM_MACHINE) {
return ENOEXEC;
}
/*
* Go through the list of segments and set up the address space.
*
* Ordinarily there will be one code segment, one read-only
* data segment, and one data/bss segment, but there might
* conceivably be more. You don't need to support such files
* if it's unduly awkward to do so.
*
* Note that the expression eh.e_phoff + i*eh.e_phentsize is
* mandated by the ELF standard - we use sizeof(ph) to load,
* because that's the structure we know, but the file on disk
* might have a larger structure, so we must use e_phentsize
* to find where the phdr starts.
*/
for (i=0; i<eh.e_phnum; i++) {
off_t offset = eh.e_phoff + i*eh.e_phentsize;
uio_kinit(&iov, &ku, &ph, sizeof(ph), offset, UIO_READ);
result = VOP_READ(v, &ku);
if (result) {
return result;
}
if (ku.uio_resid != 0) {
/* short read; problem with executable? */
kprintf("ELF: short read on phdr - file truncated?\n");
return ENOEXEC;
}
switch (ph.p_type) {
case PT_NULL: /* skip */ continue;
case PT_PHDR: /* skip */ continue;
case PT_MIPS_REGINFO: /* skip */ continue;
case PT_LOAD: break;
default:
kprintf("loadelf: unknown segment type %d\n",
ph.p_type);
return ENOEXEC;
}
result = as_define_region(as,
ph.p_vaddr, ph.p_memsz,
ph.p_flags & PF_R,
ph.p_flags & PF_W,
ph.p_flags & PF_X);
if (result) {
return result;
}
}
result = as_prepare_load(as);
if (result) {
return result;
}
/*
* Now actually load each segment.
*/
for (i=0; i<eh.e_phnum; i++) {
off_t offset = eh.e_phoff + i*eh.e_phentsize;
uio_kinit(&iov, &ku, &ph, sizeof(ph), offset, UIO_READ);
result = VOP_READ(v, &ku);
if (result) {
return result;
}
if (ku.uio_resid != 0) {
/* short read; problem with executable? */
kprintf("ELF: short read on phdr - file truncated?\n");
return ENOEXEC;
}
switch (ph.p_type) {
case PT_NULL: /* skip */ continue;
case PT_PHDR: /* skip */ continue;
case PT_MIPS_REGINFO: /* skip */ continue;
case PT_LOAD: break;
default:
kprintf("loadelf: unknown segment type %d\n",
ph.p_type);
return ENOEXEC;
}
result = load_segment(as, v, ph.p_offset, ph.p_vaddr,
ph.p_memsz, ph.p_filesz,
ph.p_flags & PF_X);
if (result) {
return result;
}
}
result = as_complete_load(as);
if (result) {
return result;
}
*entrypoint = eh.e_entry;
return 0;
}
/*
* Load an ELF executable user program into the current address space.
*
* Returns the entry point (initial PC) for the program in ENTRYPOINT.
*/
int
load_elf(struct vnode *v, vaddr_t *entrypoint)
{
Elf_Ehdr eh; /* Executable header */
Elf_Phdr ph; /* "Program header" = segment header */
int result, i;
struct iovec iov;
struct uio ku;
struct addrspace *as = curthread->t_addrspace;
/*
* Read the executable header from offset 0 in the file.
*/
uio_kinit(&iov, &ku, &eh, sizeof(eh), 0, UIO_READ);
result = VOP_READ(v, &ku);
if (result) {
return result;
}
if (ku.uio_resid != 0) {
/* short read; problem with executable? */
kprintf("ELF: short read on header - file truncated?\n");
return ENOEXEC;
}
/*
* Check to make sure it's a 32-bit ELF-version-1 executable
* for our processor type. If it's not, we can't run it.
*
* Ignore EI_OSABI and EI_ABIVERSION - properly, we should
* define our own, but that would require tinkering with the
* linker to have it emit our magic numbers instead of the
* default ones. (If the linker even supports these fields,
* which were not in the original elf spec.)
*/
if (eh.e_ident[EI_MAG0] != ELFMAG0 ||
eh.e_ident[EI_MAG1] != ELFMAG1 ||
eh.e_ident[EI_MAG2] != ELFMAG2 ||
eh.e_ident[EI_MAG3] != ELFMAG3 ||
eh.e_ident[EI_CLASS] != ELFCLASS32 ||
eh.e_ident[EI_DATA] != ELFDATA2MSB ||
eh.e_ident[EI_VERSION] != EV_CURRENT ||
eh.e_version != EV_CURRENT ||
eh.e_type!=ET_EXEC ||
eh.e_machine!=EM_MACHINE) {
return ENOEXEC;
}
/*
* Go through the list of segments and set up the address space.
*
* Ordinarily there will be one code segment, one read-only
* data segment, and one data/bss segment, but there might
* conceivably be more. You don't need to support such files
* if it's unduly awkward to do so.
*
* Note that the expression eh.e_phoff + i*eh.e_phentsize is
* mandated by the ELF standard - we use sizeof(ph) to load,
* because that's the structure we know, but the file on disk
* might have a larger structure, so we must use e_phentsize
* to find where the phdr starts.
*/
DEBUG(DB_DEMAND,"Num Of Segements:%d\n",eh.e_phnum);
for (i=0; i<eh.e_phnum; i++) {
off_t offset = eh.e_phoff + i*eh.e_phentsize;
uio_kinit(&iov, &ku, &ph, sizeof(ph), offset, UIO_READ);
result = VOP_READ(v, &ku);
if (result) {
return result;
}
if (ku.uio_resid != 0) {
/* short read; problem with executable? */
kprintf("ELF: short read on phdr - file truncated?\n");
return ENOEXEC;
}
switch (ph.p_type) {
case PT_NULL: /* skip */ continue;
case PT_PHDR: /* skip */ continue;
case PT_MIPS_REGINFO: /* skip */ continue;
case PT_LOAD: break;
default:
kprintf("loadelf: unknown segment type %d\n",
ph.p_type);
return ENOEXEC;
}
DEBUG(DB_DEMAND, "MEM SZ:%d\n",ph.p_memsz);
DEBUG(DB_DEMAND, "FILE SZ:%d\n", ph.p_filesz);
DEBUG(DB_DEMAND, "VADDR:%p\n",(void*)ph.p_vaddr);
result = as_define_region(curthread->t_addrspace,
ph.p_vaddr, ph.p_memsz,
ph.p_flags & PF_R,
ph.p_flags & PF_W,
ph.p_flags & PF_X);
if (result) {
return result;
}
}
result = as_prepare_load(curthread->t_addrspace);
if (result) {
return result;
}
/*
* Now actually load each segment.
*/
for (i=0; i<eh.e_phnum; i++) {
off_t offset = eh.e_phoff + i*eh.e_phentsize;
uio_kinit(&iov, &ku, &ph, sizeof(ph), offset, UIO_READ);
DEBUG(DB_DEMAND, "SEGMENT: %d\n",1);
result = VOP_READ(v, &ku);
if (result) {
return result;
}
if (ku.uio_resid != 0) {
/* short read; problem with executable? */
kprintf("ELF: short read on phdr - file truncated?\n");
return ENOEXEC;
}
switch (ph.p_type) {
case PT_NULL: /* skip */ continue;
case PT_PHDR: /* skip */ continue;
case PT_MIPS_REGINFO: /* skip */ continue;
case PT_LOAD: break;
default:
kprintf("loadelf: unknown segment type %d\n",
ph.p_type);
return ENOEXEC;
}
struct addrspace *as = curthread->t_addrspace;
vaddr_t va = ph.p_vaddr;
DEBUG(DB_DEMAND, "Original VA: %p\n", (void*) va);
DEBUG(DB_DEMAND, "Max VA:%p\n", (void*) (va + ph.p_memsz));
// va &= PAGE_FRAME;
struct page_table *pt = pgdir_walk(as,va,false);
int pt_index = VA_TO_PT_INDEX(va);
int permissions = PTE_TO_PERMISSIONS(pt->table[pt_index]);
int small_pages = 0;
if(ph.p_memsz <= PAGE_SIZE)
{
DEBUG(DB_DEMAND, "Segement Total Size is < 4k\n");
// pt = pgdir_walk(as,va,false);
// pt_index = VA_TO_PT_INDEX(va);
// permissions = PTE_TO_PERMISSIONS(pt->table[pt_index]);
result = dynamic_load_segment(v, ph.p_offset, va,
ph.p_memsz, ph.p_filesz,
ph.p_flags & PF_X,permissions);
if (result) {
return result;
}
// page->state = DIRTY;
small_pages = 1;
}
else
{
int filesize = (int) ph.p_filesz;
int memsize = (int) ph.p_memsz;
off_t cur_offset = ph.p_offset;
DEBUG(DB_DEMAND, "Loading >1 Segment\n");
DEBUG(DB_DEMAND, "Original Parameters:\n");
DEBUG(DB_DEMAND, "File Size: %d\n",filesize);
DEBUG(DB_DEMAND, "Mem Size: %d\n", memsize);
DEBUG(DB_DEMAND, "Offset:%d\n", (int) cur_offset);
DEBUG(DB_DEMAND, "VA:%p\n", (void*) va);
size_t amt_to_read;
int pages = 0;
int blank_pages = 0;
while(filesize > 0)
{
// struct page *page = page_alloc(as,va & PAGE_FRAME,permissions);
DEBUG(DB_DEMAND, "loading...\n");
DEBUG(DB_DEMAND, "File Size: %d\n",filesize);
DEBUG(DB_DEMAND, "Mem Size: %d\n", memsize);
DEBUG(DB_DEMAND, "Offset:%d\n", (int) cur_offset);
DEBUG(DB_DEMAND, "VA:%p\n", (void*) va);
amt_to_read = (filesize - PAGE_SIZE > 0 ? PAGE_SIZE : filesize);
result = dynamic_load_segment(v, cur_offset, va,
PAGE_SIZE, amt_to_read, ph.p_flags & PF_X,permissions);
if (result) {
return result;
}
filesize -= PAGE_SIZE;
memsize -= PAGE_SIZE;
va += PAGE_SIZE;
cur_offset += PAGE_SIZE;
// page->state = DIRTY;
pages++;
}
(void)blank_pages;
DEBUG(DB_DEMAND,"Empty Pages...\n");
while(memsize > 0)
{
DEBUG(DB_DEMAND,"Mem Size:%d\n",memsize);
DEBUG(DB_DEMAND,"VA: %p\n",(void*) va);
bool lock = get_coremap_lock();
struct page *page = page_alloc(as,va & PAGE_FRAME,permissions);
release_coremap_lock(lock);
va += PAGE_SIZE;
memsize -= PAGE_SIZE;
KASSERT(page->state == LOCKED);
page->state = DIRTY;
blank_pages++;
}
DEBUG(DB_DEMAND, "Small Pages: %d\n", small_pages);
DEBUG(DB_DEMAND, "Pages: %d\n", pages);
DEBUG(DB_DEMAND, "Blank Pages: %d\n", blank_pages);
}
// result = load_segment(v, ph.p_offset, ph.p_vaddr,
// ph.p_memsz, ph.p_filesz,
// ph.p_flags & PF_X);
if (result) {
return result;
}
}
result = as_complete_load(curthread->t_addrspace);
if (result) {
return result;
}
*entrypoint = eh.e_entry;
/* Register load complete in addrspace */
as->loadelf_done = true;
DEBUG(DB_VM,"LoadELFDone\n");
// kprintf("LoadELF done\n");
return 0;
}
static
int
fstest_write(const char *fs, const char *namesuffix,
int stridesize, int stridepos)
{
struct vnode *vn;
int err;
int i;
size_t shouldbytes=0;
size_t bytes=0;
off_t pos=0;
char name[32];
char buf[32];
struct iovec iov;
struct uio ku;
int flags;
KASSERT(sizeof(buf) > strlen(SLOGAN));
MAKENAME();
flags = O_WRONLY|O_CREAT;
if (stridesize == 1) {
flags |= O_TRUNC;
}
/* vfs_open destroys the string it's passed */
strcpy(buf, name);
err = vfs_open(buf, flags, 0664, &vn);
if (err) {
kprintf("Could not open %s for write: %s\n",
name, strerror(err));
return -1;
}
for (i=0; i<NCHUNKS; i++) {
if (i % stridesize != stridepos) {
pos += strlen(SLOGAN);
continue;
}
strcpy(buf, SLOGAN);
rotate(buf, i);
uio_kinit(&iov, &ku, buf, strlen(SLOGAN), pos, UIO_WRITE);
err = VOP_WRITE(vn, &ku);
if (err) {
kprintf("%s: Write error: %s\n", name, strerror(err));
vfs_close(vn);
vfs_remove(name);
return -1;
}
if (ku.uio_resid > 0) {
kprintf("%s: Short write: %lu bytes left over\n",
name, (unsigned long) ku.uio_resid);
vfs_close(vn);
vfs_remove(name);
return -1;
}
bytes += (ku.uio_offset - pos);
shouldbytes += strlen(SLOGAN);
pos = ku.uio_offset;
}
vfs_close(vn);
if (bytes != shouldbytes) {
kprintf("%s: %lu bytes written, should have been %lu!\n",
name, (unsigned long) bytes,
(unsigned long) (NCHUNKS*strlen(SLOGAN)));
vfs_remove(name);
return -1;
}
kprintf("%s: %lu bytes written\n", name, (unsigned long) bytes);
return 0;
}
static
int
fstest_read(const char *fs, const char *namesuffix)
{
struct vnode *vn;
int err;
int i;
size_t bytes=0;
char name[32];
char buf[32];
struct iovec iov;
struct uio ku;
MAKENAME();
/* vfs_open destroys the string it's passed */
strcpy(buf, name);
err = vfs_open(buf, O_RDONLY, 0664, &vn);
if (err) {
kprintf("Could not open test file for read: %s\n",
strerror(err));
return -1;
}
for (i=0; i<NCHUNKS; i++) {
uio_kinit(&iov, &ku, buf, strlen(SLOGAN), bytes, UIO_READ);
err = VOP_READ(vn, &ku);
if (err) {
kprintf("%s: Read error: %s\n", name, strerror(err));
vfs_close(vn);
return -1;
}
if (ku.uio_resid > 0) {
kprintf("%s: Short read: %lu bytes left over\n", name,
(unsigned long) ku.uio_resid);
vfs_close(vn);
return -1;
}
buf[strlen(SLOGAN)] = 0;
rotate(buf, -i);
if (strcmp(buf, SLOGAN)) {
kprintf("%s: Test failed: line %d mismatched: %s\n",
name, i+1, buf);
vfs_close(vn);
return -1;
}
bytes = ku.uio_offset;
}
vfs_close(vn);
if (bytes != NCHUNKS*strlen(SLOGAN)) {
kprintf("%s: %lu bytes read, should have been %lu!\n",
name, (unsigned long) bytes,
(unsigned long) (NCHUNKS*strlen(SLOGAN)));
return -1;
}
kprintf("%s: %lu bytes read\n", name, (unsigned long) bytes);
return 0;
}
int
printfile(int nargs, char **args)
{
struct vnode *rv, *wv;
struct iovec iov;
struct uio ku;
off_t rpos=0, wpos=0;
char buf[128];
char outfile[16];
int result;
int done=0;
if (nargs != 2) {
kprintf("Usage: pf filename\n");
return EINVAL;
}
/* vfs_open destroys the string it's passed; make a copy */
strcpy(outfile, "con:");
result = vfs_open(args[1], O_RDONLY, 0664, &rv);
if (result) {
kprintf("printfile: %s\n", strerror(result));
return result;
}
result = vfs_open(outfile, O_WRONLY, 0664, &wv);
if (result) {
kprintf("printfile: output: %s\n", strerror(result));
vfs_close(rv);
return result;
}
while (!done) {
uio_kinit(&iov, &ku, buf, sizeof(buf), rpos, UIO_READ);
result = VOP_READ(rv, &ku);
if (result) {
kprintf("Read error: %s\n", strerror(result));
break;
}
rpos = ku.uio_offset;
if (ku.uio_resid > 0) {
done = 1;
}
uio_kinit(&iov, &ku, buf, sizeof(buf)-ku.uio_resid, wpos,
UIO_WRITE);
result = VOP_WRITE(wv, &ku);
if (result) {
kprintf("Write error: %s\n", strerror(result));
break;
}
wpos = ku.uio_offset;
if (ku.uio_resid > 0) {
kprintf("Warning: short write\n");
}
}
vfs_close(wv);
vfs_close(rv);
return 0;
}