static void
kerext_process_swap(void *data) {
struct kerargs_process_swap *kap = data;
PROCESS *parent = kap->parent;
PROCESS *child = kap->child;
CONNECT *proc_cop;
pid_t pid;
int i;
DEBUG *swap;
lock_kernel();
/* Swap process containers */
process_vector.vector[PINDEX(parent->pid)] = child;
process_vector.vector[PINDEX(child->pid)] = parent;
if(child->parent != parent) crash();
process_swap(child);
pid = parent->pid;
parent->pid = child->pid;
child->pid = pid;
if(parent->ocb_list || child->ocb_list) {
void *ocb_list;
ocb_list = parent->ocb_list;
parent->ocb_list = child->ocb_list;
child->ocb_list = ocb_list;
}
if(parent->alarm) {
TIMER *alarm = parent->alarm;
parent->alarm = 0;
alarm->thread = child->valid_thp;
child->alarm = alarm;
}
/* Flags to inherit */
#define FLAGS (_NTO_PF_WAITINFO | \
_NTO_PF_WAITDONE | \
_NTO_PF_SLEADER | \
_NTO_PF_ORPHAN_PGRP | \
_NTO_PF_NOCLDSTOP | \
_NTO_PF_PTRACED | \
_NTO_PF_NOZOMBIE)
i = parent->flags;
parent->flags = (parent->flags & ~FLAGS) | (child->flags & FLAGS);
child->flags = (child->flags & ~FLAGS) | (i & FLAGS);
#undef FLAGS
// Find the child's connection to proc (It's always the first chancon entry)
proc_cop = vector_lookup(&child->chancons, SYSMGR_COID & ~_NTO_SIDE_CHANNEL);
#ifndef NDEBUG
// There should be two links, One from the Send() and one from the ConnectAttach()
if(!proc_cop || !proc_cop->channel || proc_cop->links != 2) crash();
if(proc_cop->un.lcl.pid != SYSMGR_PID || proc_cop->un.lcl.chid != SYSMGR_CHID) crash();
if(parent->chancons.nentries != parent->chancons.nfree) crash();
if(child->chancons.nentries != child->chancons.nfree + 1) crash();
if(child->fdcons.nentries != child->fdcons.nfree) crash();
#endif
for(i = 0 ; i < parent->fdcons.nentries ; ++i) {
CONNECT *cop;
if((cop = vector_rem(&parent->fdcons, i))) {
if(vector_add(&child->fdcons, cop, i) != i) {
crash();
}
parent->nfds--;
child->nfds++;
cop->process = child;
// Check if this connects to proc's channel, if so, share it...
if(proc_cop && cop->channel == proc_cop->channel) {
vector_rem(&child->chancons, SYSMGR_COID & ~_NTO_SIDE_CHANNEL);
vector_add(&child->chancons, cop, SYSMGR_COID & ~_NTO_SIDE_CHANNEL);
cop->links++;
proc_cop->links--;
proc_cop = 0;
}
}
}
swap = child->debugger;
if((swap != NULL) && (swap->process == child)) {
swap->process = parent;
}
swap = parent->debugger;
if((swap != NULL) && (swap->process == parent)) {
swap->process = child;
}
parent->debugger = child->debugger;
child->debugger = swap;
SETKSTATUS(actives[KERNCPU], 0);
}
static int swap_out(unsigned int priority, int gfp_mask, unsigned long idle_time)
{
struct task_struct * p;
int counter;
int __ret = 0;
lock_kernel();
/*
* We make one or two passes through the task list, indexed by
* assign = {0, 1}:
* Pass 1: select the swappable task with maximal RSS that has
* not yet been swapped out.
* Pass 2: re-assign rss swap_cnt values, then select as above.
*
* With this approach, there's no need to remember the last task
* swapped out. If the swap-out fails, we clear swap_cnt so the
* task won't be selected again until all others have been tried.
*
* Think of swap_cnt as a "shadow rss" - it tells us which process
* we want to page out (always try largest first).
*/
counter = (nr_threads << SWAP_SHIFT) >> priority;
if (counter < 1)
counter = 1;
for (; counter >= 0; counter--) {
unsigned long max_cnt = 0;
struct mm_struct *best = NULL;
int pid = 0;
int assign = 0;
int found_task = 0;
select:
read_lock(&tasklist_lock);
p = init_task.next_task;
for (; p != &init_task; p = p->next_task) {
struct mm_struct *mm = p->mm;
if (!p->swappable || !mm)
continue;
if (mm->rss <= 0)
continue;
/* Skip tasks which haven't slept long enough yet when idle-swapping. */
if (idle_time && !assign && (!(p->state & TASK_INTERRUPTIBLE) ||
time_after(p->sleep_time + idle_time * HZ, jiffies)))
continue;
found_task++;
/* Refresh swap_cnt? */
if (assign == 1) {
mm->swap_cnt = (mm->rss >> SWAP_SHIFT);
if (mm->swap_cnt < SWAP_MIN)
mm->swap_cnt = SWAP_MIN;
}
if (mm->swap_cnt > max_cnt) {
max_cnt = mm->swap_cnt;
best = mm;
pid = p->pid;
}
}
read_unlock(&tasklist_lock);
if (!best) {
if (!assign && found_task > 0) {
assign = 1;
goto select;
}
goto out;
} else {
int ret;
atomic_inc(&best->mm_count);
ret = swap_out_mm(best, gfp_mask);
mmdrop(best);
__ret = 1;
goto out;
}
}
/**
* iowarrior_ioctl
*/
static long iowarrior_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct iowarrior *dev = NULL;
__u8 *buffer;
__u8 __user *user_buffer;
int retval;
int io_res; /* checks for bytes read/written and copy_to/from_user results */
dev = (struct iowarrior *)file->private_data;
if (dev == NULL) {
return -ENODEV;
}
buffer = kzalloc(dev->report_size, GFP_KERNEL);
if (!buffer)
return -ENOMEM;
/* lock this object */
lock_kernel();
mutex_lock(&dev->mutex);
/* verify that the device wasn't unplugged */
if (!dev->present) {
retval = -ENODEV;
goto error_out;
}
dbg("%s - minor %d, cmd 0x%.4x, arg %ld", __func__, dev->minor, cmd,
arg);
retval = 0;
io_res = 0;
switch (cmd) {
case IOW_WRITE:
if (dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW24 ||
dev->product_id == USB_DEVICE_ID_CODEMERCS_IOWPV1 ||
dev->product_id == USB_DEVICE_ID_CODEMERCS_IOWPV2 ||
dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW40) {
user_buffer = (__u8 __user *)arg;
io_res = copy_from_user(buffer, user_buffer,
dev->report_size);
if (io_res) {
retval = -EFAULT;
} else {
io_res = usb_set_report(dev->interface, 2, 0,
buffer,
dev->report_size);
if (io_res < 0)
retval = io_res;
}
} else {
retval = -EINVAL;
dev_err(&dev->interface->dev,
"ioctl 'IOW_WRITE' is not supported for product=0x%x.\n",
dev->product_id);
}
break;
case IOW_READ:
user_buffer = (__u8 __user *)arg;
io_res = usb_get_report(dev->udev,
dev->interface->cur_altsetting, 1, 0,
buffer, dev->report_size);
if (io_res < 0)
retval = io_res;
else {
io_res = copy_to_user(user_buffer, buffer, dev->report_size);
if (io_res < 0)
retval = -EFAULT;
}
break;
case IOW_GETINFO:
{
/* Report available information for the device */
struct iowarrior_info info;
/* needed for power consumption */
struct usb_config_descriptor *cfg_descriptor = &dev->udev->actconfig->desc;
memset(&info, 0, sizeof(info));
/* directly from the descriptor */
info.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
info.product = dev->product_id;
info.revision = le16_to_cpu(dev->udev->descriptor.bcdDevice);
/* 0==UNKNOWN, 1==LOW(usb1.1) ,2=FULL(usb1.1), 3=HIGH(usb2.0) */
info.speed = le16_to_cpu(dev->udev->speed);
info.if_num = dev->interface->cur_altsetting->desc.bInterfaceNumber;
info.report_size = dev->report_size;
/* serial number string has been read earlier 8 chars or empty string */
memcpy(info.serial, dev->chip_serial,
sizeof(dev->chip_serial));
if (cfg_descriptor == NULL) {
info.power = -1; /* no information available */
} else {
/* the MaxPower is stored in units of 2mA to make it fit into a byte-value */
info.power = cfg_descriptor->bMaxPower * 2;
}
io_res = copy_to_user((struct iowarrior_info __user *)arg, &info,
sizeof(struct iowarrior_info));
if (io_res < 0)
retval = -EFAULT;
break;
}
default:
/* return that we did not understand this ioctl call */
retval = -ENOTTY;
break;
}
error_out:
/* unlock the device */
mutex_unlock(&dev->mutex);
unlock_kernel();
kfree(buffer);
return retval;
}
/*
* This is the lockd kernel thread
*/
static void
lockd(struct svc_rqst *rqstp)
{
int err = 0;
unsigned long grace_period_expire;
/* Lock module and set up kernel thread */
/* lockd_up is waiting for us to startup, so will
* be holding a reference to this module, so it
* is safe to just claim another reference
*/
__module_get(THIS_MODULE);
lock_kernel();
/*
* Let our maker know we're running.
*/
nlmsvc_pid = current->pid;
nlmsvc_serv = rqstp->rq_server;
complete(&lockd_start_done);
daemonize("lockd");
/* Process request with signals blocked, but allow SIGKILL. */
allow_signal(SIGKILL);
/* kick rpciod */
rpciod_up();
dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n");
if (!nlm_timeout)
nlm_timeout = LOCKD_DFLT_TIMEO;
nlmsvc_timeout = nlm_timeout * HZ;
grace_period_expire = set_grace_period();
/*
* The main request loop. We don't terminate until the last
* NFS mount or NFS daemon has gone away, and we've been sent a
* signal, or else another process has taken over our job.
*/
while ((nlmsvc_users || !signalled()) && nlmsvc_pid == current->pid) {
long timeout = MAX_SCHEDULE_TIMEOUT;
char buf[RPC_MAX_ADDRBUFLEN];
if (signalled()) {
flush_signals(current);
if (nlmsvc_ops) {
nlmsvc_invalidate_all();
grace_period_expire = set_grace_period();
}
}
/*
* Retry any blocked locks that have been notified by
* the VFS. Don't do this during grace period.
* (Theoretically, there shouldn't even be blocked locks
* during grace period).
*/
if (!nlmsvc_grace_period) {
timeout = nlmsvc_retry_blocked();
} else if (time_before(grace_period_expire, jiffies))
clear_grace_period();
/*
* Find a socket with data available and call its
* recvfrom routine.
*/
err = svc_recv(rqstp, timeout);
if (err == -EAGAIN || err == -EINTR)
continue;
if (err < 0) {
printk(KERN_WARNING
"lockd: terminating on error %d\n",
-err);
break;
}
dprintk("lockd: request from %s\n",
svc_print_addr(rqstp, buf, sizeof(buf)));
svc_process(rqstp);
}
flush_signals(current);
/*
* Check whether there's a new lockd process before
* shutting down the hosts and clearing the slot.
*/
if (!nlmsvc_pid || current->pid == nlmsvc_pid) {
if (nlmsvc_ops)
nlmsvc_invalidate_all();
nlm_shutdown_hosts();
nlmsvc_pid = 0;
nlmsvc_serv = NULL;
} else
printk(KERN_DEBUG
"lockd: new process, skipping host shutdown\n");
wake_up(&lockd_exit);
/* Exit the RPC thread */
svc_exit_thread(rqstp);
/* release rpciod */
rpciod_down();
/* Release module */
unlock_kernel();
module_put_and_exit(0);
}
asmlinkage int
sys_sysmips(int cmd, int arg1, int arg2, int arg3)
{
int *p;
char *name;
int flags, tmp, len, retval;
lock_kernel();
switch(cmd)
{
case SETNAME:
retval = -EPERM;
if (!capable(CAP_SYS_ADMIN))
goto out;
name = (char *) arg1;
len = strlen_user(name);
retval = len;
if (len < 0)
goto out;
retval = -EINVAL;
if (len == 0 || len > __NEW_UTS_LEN)
goto out;
copy_from_user(system_utsname.nodename, name, len);
system_utsname.nodename[len] = '\0';
retval = 0;
goto out;
case MIPS_ATOMIC_SET:
/* This is page-faults safe */
{
static volatile int lock = 0;
static struct wait_queue *wq = NULL;
struct wait_queue wait = { current, NULL };
int retry = 0;
p = (int *) arg1;
current->state = TASK_INTERRUPTIBLE;
add_wait_queue(&wq, &wait);
while (lock) {
if (retry > 20) break;
retry ++;
if (signal_pending(current)) {
remove_wait_queue(&wq, &wait);
current->state = TASK_RUNNING;
retval = -EINTR;
goto out;
}
schedule();
current->state = TASK_INTERRUPTIBLE;
}
remove_wait_queue (&wq, &wait);
current->state = TASK_RUNNING;
if (lock) {
retval = -EAGAIN;
goto out;
}
lock ++;
retval = verify_area(VERIFY_WRITE, p, sizeof(*p));
if (retval) {
goto out_atomic_set;
}
/* swap *p and arg2, this cause possibly page faults */
if (__get_user(retval, p)) {
retval = -EFAULT;
goto out_atomic_set;
}
__put_user(arg2, p);
out_atomic_set:
lock --;
wake_up_interruptible(&wq);
goto out;
}
case MIPS_FIXADE:
tmp = current->tss.mflags & ~3;
current->tss.mflags = tmp | (arg1 & 3);
retval = 0;
goto out;
case FLUSH_CACHE:
flush_cache_all();
retval = 0;
goto out;
case MIPS_RDNVRAM:
retval = -EIO;
goto out;
#ifdef CONFIG_CPU_R5900
case MIPS_SYS_R5900:
retval = mips_sys_r5900(arg1, arg2, arg3);
goto out;
#endif
default:
retval = -EINVAL;
goto out;
}
out:
unlock_kernel();
return retval;
}
asmlinkage int
sunos_mount(char __user *type, char __user *dir, int flags, void __user *data)
{
int linux_flags = 0;
int ret = -EINVAL;
char *dev_fname = 0;
char *dir_page, *type_page;
if (!capable (CAP_SYS_ADMIN))
return -EPERM;
lock_kernel();
/* We don't handle the integer fs type */
if ((flags & SMNT_NEWTYPE) == 0)
goto out;
/* Do not allow for those flags we don't support */
if (flags & (SMNT_GRPID|SMNT_NOSUB|SMNT_MULTI|SMNT_SYS5))
goto out;
if (flags & SMNT_REMOUNT)
linux_flags |= MS_REMOUNT;
if (flags & SMNT_RDONLY)
linux_flags |= MS_RDONLY;
if (flags & SMNT_NOSUID)
linux_flags |= MS_NOSUID;
dir_page = getname(dir);
ret = PTR_ERR(dir_page);
if (IS_ERR(dir_page))
goto out;
type_page = getname(type);
ret = PTR_ERR(type_page);
if (IS_ERR(type_page))
goto out1;
if (strcmp(type_page, "ext2") == 0) {
dev_fname = getname(data);
} else if (strcmp(type_page, "iso9660") == 0) {
dev_fname = getname(data);
} else if (strcmp(type_page, "minix") == 0) {
dev_fname = getname(data);
} else if (strcmp(type_page, "nfs") == 0) {
ret = sunos_nfs_mount (dir_page, flags, data);
goto out2;
} else if (strcmp(type_page, "ufs") == 0) {
printk("Warning: UFS filesystem mounts unsupported.\n");
ret = -ENODEV;
goto out2;
} else if (strcmp(type_page, "proc")) {
ret = -ENODEV;
goto out2;
}
ret = PTR_ERR(dev_fname);
if (IS_ERR(dev_fname))
goto out2;
ret = do_mount(dev_fname, dir_page, type_page, linux_flags, NULL);
if (dev_fname)
putname(dev_fname);
out2:
putname(type_page);
out1:
putname(dir_page);
out:
unlock_kernel();
return ret;
}
int
osi_UFSTruncate(register struct osi_file *afile, afs_int32 asize)
{
register afs_int32 code;
struct osi_stat tstat;
struct iattr newattrs;
struct inode *inode = OSIFILE_INODE(afile);
AFS_STATCNT(osi_Truncate);
/* This routine only shrinks files, and most systems
* have very slow truncates, even when the file is already
* small enough. Check now and save some time.
*/
code = afs_osi_Stat(afile, &tstat);
if (code || tstat.size <= asize)
return code;
MObtainWriteLock(&afs_xosi, 321);
AFS_GUNLOCK();
#ifdef STRUCT_INODE_HAS_I_ALLOC_SEM
down_write(&inode->i_alloc_sem);
#endif
#ifdef STRUCT_INODE_HAS_I_MUTEX
mutex_lock(&inode->i_mutex);
#else
down(&inode->i_sem);
#endif
newattrs.ia_size = asize;
newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
#if defined(AFS_LINUX24_ENV)
newattrs.ia_ctime = CURRENT_TIME;
/* avoid notify_change() since it wants to update dentry->d_parent */
lock_kernel();
code = inode_change_ok(inode, &newattrs);
if (!code)
#ifdef INODE_SETATTR_NOT_VOID
code = inode_setattr(inode, &newattrs);
#else
inode_setattr(inode, &newattrs);
#endif
unlock_kernel();
if (!code)
truncate_inode_pages(&inode->i_data, asize);
#else
i_size_write(inode, asize);
if (inode->i_sb->s_op && inode->i_sb->s_op->notify_change) {
code = inode->i_sb->s_op->notify_change(&afile->dentry, &newattrs);
}
if (!code) {
truncate_inode_pages(inode, asize);
if (inode->i_op && inode->i_op->truncate)
inode->i_op->truncate(inode);
}
#endif
code = -code;
#ifdef STRUCT_INODE_HAS_I_MUTEX
mutex_unlock(&inode->i_mutex);
#else
up(&inode->i_sem);
#endif
#ifdef STRUCT_INODE_HAS_I_ALLOC_SEM
up_write(&inode->i_alloc_sem);
#endif
AFS_GLOCK();
MReleaseWriteLock(&afs_xosi);
return code;
}
static int handle_op(struct test_thread_data *td, int lockwakeup)
{
int i, id, ret = -EINVAL;
switch(td->opcode) {
case RTTEST_NOP:
return 0;
case RTTEST_LOCKCONT:
td->mutexes[td->opdata] = 1;
td->event = atomic_add_return(1, &rttest_event);
return 0;
case RTTEST_RESET:
for (i = 0; i < MAX_RT_TEST_MUTEXES; i++) {
if (td->mutexes[i] == 4) {
rt_mutex_unlock(&mutexes[i]);
td->mutexes[i] = 0;
}
}
if (!lockwakeup && td->bkl == 4) {
unlock_kernel();
td->bkl = 0;
}
return 0;
case RTTEST_RESETEVENT:
atomic_set(&rttest_event, 0);
return 0;
default:
if (lockwakeup)
return ret;
}
switch(td->opcode) {
case RTTEST_LOCK:
case RTTEST_LOCKNOWAIT:
id = td->opdata;
if (id < 0 || id >= MAX_RT_TEST_MUTEXES)
return ret;
td->mutexes[id] = 1;
td->event = atomic_add_return(1, &rttest_event);
rt_mutex_lock(&mutexes[id]);
td->event = atomic_add_return(1, &rttest_event);
td->mutexes[id] = 4;
return 0;
case RTTEST_LOCKINT:
case RTTEST_LOCKINTNOWAIT:
id = td->opdata;
if (id < 0 || id >= MAX_RT_TEST_MUTEXES)
return ret;
td->mutexes[id] = 1;
td->event = atomic_add_return(1, &rttest_event);
ret = rt_mutex_lock_interruptible(&mutexes[id], 0);
td->event = atomic_add_return(1, &rttest_event);
td->mutexes[id] = ret ? 0 : 4;
return ret ? -EINTR : 0;
case RTTEST_UNLOCK:
id = td->opdata;
if (id < 0 || id >= MAX_RT_TEST_MUTEXES || td->mutexes[id] != 4)
return ret;
td->event = atomic_add_return(1, &rttest_event);
rt_mutex_unlock(&mutexes[id]);
td->event = atomic_add_return(1, &rttest_event);
td->mutexes[id] = 0;
return 0;
case RTTEST_LOCKBKL:
if (td->bkl)
return 0;
td->bkl = 1;
lock_kernel();
td->bkl = 4;
return 0;
case RTTEST_UNLOCKBKL:
if (td->bkl != 4)
break;
unlock_kernel();
td->bkl = 0;
return 0;
default:
break;
}
return ret;
}
static int __init scx200_acb_create(int base, int index)
{
struct scx200_acb_iface *iface;
struct i2c_adapter *adapter;
int rc = 0;
char description[64];
iface = kmalloc(sizeof(*iface), GFP_KERNEL);
if (!iface) {
printk(KERN_ERR NAME ": can't allocate memory\n");
rc = -ENOMEM;
goto errout;
}
memset(iface, 0, sizeof(*iface));
adapter = &iface->adapter;
i2c_set_adapdata(adapter, iface);
snprintf(adapter->name, I2C_NAME_SIZE, "SCx200 ACB%d", index);
adapter->owner = THIS_MODULE;
adapter->id = I2C_ALGO_SMBUS;
adapter->algo = &scx200_acb_algorithm;
init_MUTEX(&iface->sem);
snprintf(description, sizeof(description), "NatSemi SCx200 ACCESS.bus [%s]", adapter->name);
if (request_region(base, 8, description) == 0) {
dev_err(&adapter->dev, "can't allocate io 0x%x-0x%x\n",
base, base + 8-1);
rc = -EBUSY;
goto errout;
}
iface->base = base;
rc = scx200_acb_probe(iface);
if (rc) {
dev_warn(&adapter->dev, "probe failed\n");
goto errout;
}
scx200_acb_reset(iface);
if (i2c_add_adapter(adapter) < 0) {
dev_err(&adapter->dev, "failed to register\n");
rc = -ENODEV;
goto errout;
}
lock_kernel();
iface->next = scx200_acb_list;
scx200_acb_list = iface;
unlock_kernel();
return 0;
errout:
if (iface) {
if (iface->base)
release_region(iface->base, 8);
kfree(iface);
}
return rc;
}
asmlinkage long sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
{
struct file * filp;
unsigned int flag;
int on, error = -EBADF;
filp = fget(fd);
if (!filp)
goto out;
error = security_file_ioctl(filp, cmd, arg);
if (error) {
fput(filp);
goto out;
}
lock_kernel();
switch (cmd) {
case FIOCLEX:
set_close_on_exec(fd, 1);
break;
case FIONCLEX:
set_close_on_exec(fd, 0);
break;
case FIONBIO:
if ((error = get_user(on, (int __user *)arg)) != 0)
break;
flag = O_NONBLOCK;
#ifdef __sparc__
/* SunOS compatibility item. */
if(O_NONBLOCK != O_NDELAY)
flag |= O_NDELAY;
#endif
if (on)
filp->f_flags |= flag;
else
filp->f_flags &= ~flag;
break;
case FIOASYNC:
if ((error = get_user(on, (int __user *)arg)) != 0)
break;
flag = on ? FASYNC : 0;
/* Did FASYNC state change ? */
if ((flag ^ filp->f_flags) & FASYNC) {
if (filp->f_op && filp->f_op->fasync)
error = filp->f_op->fasync(fd, filp, on);
else error = -ENOTTY;
}
if (error != 0)
break;
if (on)
filp->f_flags |= FASYNC;
else
filp->f_flags &= ~FASYNC;
break;
case FIOQSIZE:
if (S_ISDIR(filp->f_dentry->d_inode->i_mode) ||
S_ISREG(filp->f_dentry->d_inode->i_mode) ||
S_ISLNK(filp->f_dentry->d_inode->i_mode)) {
loff_t res = inode_get_bytes(filp->f_dentry->d_inode);
error = copy_to_user((loff_t __user *)arg, &res, sizeof(res)) ? -EFAULT : 0;
}
else
error = -ENOTTY;
break;
default:
error = -ENOTTY;
if (S_ISREG(filp->f_dentry->d_inode->i_mode))
error = file_ioctl(filp, cmd, arg);
else if (filp->f_op && filp->f_op->ioctl)
error = filp->f_op->ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
}
unlock_kernel();
fput(filp);
out:
return error;
}
/*
* This is blatantly stolen from ext2fs
*/
static int
ufs_readdir (struct file * filp, void * dirent, filldir_t filldir)
{
struct inode *inode = filp->f_dentry->d_inode;
int error = 0;
unsigned long offset, lblk;
int i, stored;
struct buffer_head * bh;
struct ufs_dir_entry * de;
struct super_block * sb;
int de_reclen;
unsigned flags;
u64 blk= 0L;
lock_kernel();
sb = inode->i_sb;
flags = UFS_SB(sb)->s_flags;
UFSD(("ENTER, ino %lu f_pos %lu\n", inode->i_ino, (unsigned long) filp->f_pos))
stored = 0;
bh = NULL;
offset = filp->f_pos & (sb->s_blocksize - 1);
while (!error && !stored && filp->f_pos < inode->i_size) {
lblk = (filp->f_pos) >> sb->s_blocksize_bits;
blk = ufs_frag_map(inode, lblk);
if (!blk || !(bh = sb_bread(sb, blk))) {
/* XXX - error - skip to the next block */
printk("ufs_readdir: "
"dir inode %lu has a hole at offset %lu\n",
inode->i_ino, (unsigned long int)filp->f_pos);
filp->f_pos += sb->s_blocksize - offset;
continue;
}
revalidate:
/* If the dir block has changed since the last call to
* readdir(2), then we might be pointing to an invalid
* dirent right now. Scan from the start of the block
* to make sure. */
if (filp->f_version != inode->i_version) {
for (i = 0; i < sb->s_blocksize && i < offset; ) {
de = (struct ufs_dir_entry *)(bh->b_data + i);
/* It's too expensive to do a full
* dirent test each time round this
* loop, but we do have to test at
* least that it is non-zero. A
* failure will be detected in the
* dirent test below. */
de_reclen = fs16_to_cpu(sb, de->d_reclen);
if (de_reclen < 1)
break;
i += de_reclen;
}
offset = i;
filp->f_pos = (filp->f_pos & ~(sb->s_blocksize - 1))
| offset;
filp->f_version = inode->i_version;
}
while (!error && filp->f_pos < inode->i_size
&& offset < sb->s_blocksize) {
de = (struct ufs_dir_entry *) (bh->b_data + offset);
/* XXX - put in a real ufs_check_dir_entry() */
if ((de->d_reclen == 0) || (ufs_get_de_namlen(sb, de) == 0)) {
filp->f_pos = (filp->f_pos &
(sb->s_blocksize - 1)) +
sb->s_blocksize;
brelse(bh);
unlock_kernel();
return stored;
}
if (!ufs_check_dir_entry ("ufs_readdir", inode, de,
bh, offset)) {
/* On error, skip the f_pos to the
next block. */
filp->f_pos = (filp->f_pos |
(sb->s_blocksize - 1)) +
1;
brelse (bh);
unlock_kernel();
return stored;
}
offset += fs16_to_cpu(sb, de->d_reclen);
if (de->d_ino) {
/* We might block in the next section
* if the data destination is
* currently swapped out. So, use a
* version stamp to detect whether or
* not the directory has been modified
* during the copy operation. */
unsigned long version = filp->f_version;
unsigned char d_type = DT_UNKNOWN;
UFSD(("filldir(%s,%u)\n", de->d_name,
fs32_to_cpu(sb, de->d_ino)))
UFSD(("namlen %u\n", ufs_get_de_namlen(sb, de)))
if ((flags & UFS_DE_MASK) == UFS_DE_44BSD)
d_type = de->d_u.d_44.d_type;
error = filldir(dirent, de->d_name,
ufs_get_de_namlen(sb, de), filp->f_pos,
fs32_to_cpu(sb, de->d_ino), d_type);
if (error)
break;
if (version != filp->f_version)
goto revalidate;
stored ++;
}
filp->f_pos += fs16_to_cpu(sb, de->d_reclen);
}
offset = 0;
brelse (bh);
}
int sys_ptrace(long request, long pid, long addr, long data)
{
struct task_struct *child;
int ret = -EPERM;
lock_kernel();
if (request == PTRACE_TRACEME) {
/* are we already being traced? */
if (current->ptrace & PT_PTRACED)
goto out;
ret = security_ptrace(current->parent, current);
if (ret)
goto out;
/* set the ptrace bit in the process flags. */
current->ptrace |= PT_PTRACED;
ret = 0;
goto out;
}
ret = -ESRCH;
read_lock(&tasklist_lock);
child = find_task_by_pid(pid);
if (child)
get_task_struct(child);
read_unlock(&tasklist_lock);
if (!child)
goto out;
ret = -EPERM;
if (pid == 1) /* you may not mess with init */
goto out_tsk;
if (request == PTRACE_ATTACH) {
ret = ptrace_attach(child);
goto out_tsk;
}
ret = ptrace_check_attach(child, request == PTRACE_KILL);
if (ret < 0)
goto out_tsk;
switch (request) {
/* when I and D space are separate, these will need to be fixed. */
case PTRACE_PEEKTEXT: /* read word at location addr. */
case PTRACE_PEEKDATA: {
unsigned long tmp;
int copied;
copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
ret = -EIO;
if (copied != sizeof(tmp))
break;
ret = put_user(tmp,(unsigned long __user *) data);
break;
}
/* read the word at location addr in the USER area. */
case PTRACE_PEEKUSR: {
unsigned long index;
unsigned long tmp;
ret = -EIO;
/* convert to index and check */
index = (unsigned long) addr >> 3;
if ((addr & 7) || (index > PT_FPSCR))
break;
if (index < PT_FPR0) {
tmp = get_reg(child, (int)index);
} else {
flush_fp_to_thread(child);
tmp = ((unsigned long *)child->thread.fpr)[index - PT_FPR0];
}
ret = put_user(tmp,(unsigned long __user *) data);
break;
}
/* If I and D space are separate, this will have to be fixed. */
case PTRACE_POKETEXT: /* write the word at location addr. */
case PTRACE_POKEDATA:
ret = 0;
if (access_process_vm(child, addr, &data, sizeof(data), 1)
== sizeof(data))
break;
ret = -EIO;
break;
/* write the word at location addr in the USER area */
case PTRACE_POKEUSR: {
unsigned long index;
ret = -EIO;
/* convert to index and check */
index = (unsigned long) addr >> 3;
if ((addr & 7) || (index > PT_FPSCR))
break;
if (index == PT_ORIG_R3)
break;
if (index < PT_FPR0) {
ret = put_reg(child, index, data);
} else {
flush_fp_to_thread(child);
((unsigned long *)child->thread.fpr)[index - PT_FPR0] = data;
ret = 0;
}
break;
}
case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
case PTRACE_CONT: { /* restart after signal. */
ret = -EIO;
if (!valid_signal(data))
break;
if (request == PTRACE_SYSCALL)
set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
else
clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
child->exit_code = data;
/* make sure the single step bit is not set. */
clear_single_step(child);
wake_up_process(child);
ret = 0;
break;
}
/*
* make the child exit. Best I can do is send it a sigkill.
* perhaps it should be put in the status that it wants to
* exit.
*/
case PTRACE_KILL: {
ret = 0;
if (child->exit_state == EXIT_ZOMBIE) /* already dead */
break;
child->exit_code = SIGKILL;
/* make sure the single step bit is not set. */
clear_single_step(child);
wake_up_process(child);
break;
}
case PTRACE_SINGLESTEP: { /* set the trap flag. */
ret = -EIO;
if (!valid_signal(data))
break;
clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
set_single_step(child);
child->exit_code = data;
/* give it a chance to run. */
wake_up_process(child);
ret = 0;
break;
}
case PTRACE_GET_DEBUGREG: {
ret = -EINVAL;
/* We only support one DABR and no IABRS at the moment */
if (addr > 0)
break;
ret = put_user(child->thread.dabr,
(unsigned long __user *)data);
break;
}
case PTRACE_SET_DEBUGREG:
ret = ptrace_set_debugreg(child, addr, data);
break;
case PTRACE_DETACH:
ret = ptrace_detach(child, data);
break;
case PPC_PTRACE_GETREGS: { /* Get GPRs 0 - 31. */
int i;
unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
unsigned long __user *tmp = (unsigned long __user *)addr;
for (i = 0; i < 32; i++) {
ret = put_user(*reg, tmp);
if (ret)
break;
reg++;
tmp++;
}
break;
}
case PPC_PTRACE_SETREGS: { /* Set GPRs 0 - 31. */
int i;
unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
unsigned long __user *tmp = (unsigned long __user *)addr;
for (i = 0; i < 32; i++) {
ret = get_user(*reg, tmp);
if (ret)
break;
reg++;
tmp++;
}
break;
}
case PPC_PTRACE_GETFPREGS: { /* Get FPRs 0 - 31. */
int i;
unsigned long *reg = &((unsigned long *)child->thread.fpr)[0];
unsigned long __user *tmp = (unsigned long __user *)addr;
flush_fp_to_thread(child);
for (i = 0; i < 32; i++) {
ret = put_user(*reg, tmp);
if (ret)
break;
reg++;
tmp++;
}
break;
}
case PPC_PTRACE_SETFPREGS: { /* Get FPRs 0 - 31. */
int i;
unsigned long *reg = &((unsigned long *)child->thread.fpr)[0];
unsigned long __user *tmp = (unsigned long __user *)addr;
flush_fp_to_thread(child);
for (i = 0; i < 32; i++) {
ret = get_user(*reg, tmp);
if (ret)
break;
reg++;
tmp++;
}
break;
}
#ifdef CONFIG_ALTIVEC
case PTRACE_GETVRREGS:
/* Get the child altivec register state. */
flush_altivec_to_thread(child);
ret = get_vrregs((unsigned long __user *)data, child);
break;
case PTRACE_SETVRREGS:
/* Set the child altivec register state. */
flush_altivec_to_thread(child);
ret = set_vrregs(child, (unsigned long __user *)data);
break;
#endif
default:
ret = ptrace_request(child, request, addr, data);
break;
}
out_tsk:
put_task_struct(child);
out:
unlock_kernel();
return ret;
}
/**
* vxfs_readdir - read a directory
* @fp: the directory to read
* @retp: return buffer
* @filler: filldir callback
*
* Description:
* vxfs_readdir fills @retp with directory entries from @fp
* using the VFS supplied callback @filler.
*
* Returns:
* Zero.
*/
static int
vxfs_readdir(struct file *fp, void *retp, filldir_t filler)
{
struct inode *ip = fp->f_path.dentry->d_inode;
struct super_block *sbp = ip->i_sb;
u_long bsize = sbp->s_blocksize;
u_long page, npages, block, pblocks, nblocks, offset;
loff_t pos;
lock_kernel();
switch ((long)fp->f_pos) {
case 0:
if (filler(retp, ".", 1, fp->f_pos, ip->i_ino, DT_DIR) < 0)
goto out;
fp->f_pos++;
/* fallthrough */
case 1:
if (filler(retp, "..", 2, fp->f_pos, VXFS_INO(ip)->vii_dotdot, DT_DIR) < 0)
goto out;
fp->f_pos++;
/* fallthrough */
}
pos = fp->f_pos - 2;
if (pos > VXFS_DIRROUND(ip->i_size)) {
unlock_kernel();
return 0;
}
npages = dir_pages(ip);
nblocks = dir_blocks(ip);
pblocks = VXFS_BLOCK_PER_PAGE(sbp);
page = pos >> PAGE_CACHE_SHIFT;
offset = pos & ~PAGE_CACHE_MASK;
block = (u_long)(pos >> sbp->s_blocksize_bits) % pblocks;
for (; page < npages; page++, block = 0) {
caddr_t kaddr;
struct page *pp;
pp = vxfs_get_page(ip->i_mapping, page);
if (IS_ERR(pp))
continue;
kaddr = (caddr_t)page_address(pp);
for (; block <= nblocks && block <= pblocks; block++) {
caddr_t baddr, limit;
struct vxfs_dirblk *dbp;
struct vxfs_direct *de;
baddr = kaddr + (block * bsize);
limit = baddr + bsize - VXFS_DIRLEN(1);
dbp = (struct vxfs_dirblk *)baddr;
de = (struct vxfs_direct *)
(offset ?
(kaddr + offset) :
(baddr + VXFS_DIRBLKOV(dbp)));
for (; (caddr_t)de <= limit; de = vxfs_next_entry(de)) {
int over;
if (!de->d_reclen)
break;
if (!de->d_ino)
continue;
offset = (caddr_t)de - kaddr;
over = filler(retp, de->d_name, de->d_namelen,
((page << PAGE_CACHE_SHIFT) | offset) + 2,
de->d_ino, DT_UNKNOWN);
if (over) {
vxfs_put_page(pp);
goto done;
}
}
offset = 0;
}
vxfs_put_page(pp);
offset = 0;
}
done:
fp->f_pos = ((page << PAGE_CACHE_SHIFT) | offset) + 2;
out:
unlock_kernel();
return 0;
}
static void
kerext_process_shutdown(void *data) {
struct kerargs_process_shutdown *args = data;
PROCESS *prp = args->prp;
THREAD *act = actives[KERNCPU];
SIGTABLE *stp;
int tid;
int i;
int try_again;
lock_kernel();
if(prp == NULL) {
prp = act->process;
}
if(prp->memory) {
// Make sure no threads reference the aspace before it's removed
for(tid = 0; tid < prp->threads.nentries; tid++) {
THREAD *thp;
if(VECP(thp, &prp->threads, tid)) {
thp->aspace_prp = 0;
}
}
try_again = 0;
for(i = 0; i < NUM_PROCESSORS; ++i) {
PROCESS *prp0;
// The code between interrupt disable and enable should be short,
// so that other CPUs will not have chance to get a interrupt and
// switch aspace during the check
InterruptDisable();
if(get_inkernel() & INKERNEL_INTRMASK) {
try_again = 1;
}
prp0 = *((PROCESS* volatile *)&aspaces_prp[i]);
if(get_inkernel() & INKERNEL_INTRMASK) {
try_again = 1;
}
InterruptEnable();
if(prp == prp0) {
// Switch current address space
if(i == KERNCPU) {
set_safe_aspace(i);
} else {
args->tlb_safe_cpu = i;
SENDIPI(i, IPI_TLB_SAFE);
try_again = 1;
}
}
}
if(try_again) {
//Another CPU is pointing at this address space. We've sent
//an IPI to get it to point at a safe entry (the process manager's),
//but we have to wait until it's been processed before we can
//destroy this address space.
kererr(act, EAGAIN);
return;
}
if(prp->flags & _NTO_PF_VFORKED) {
// We're shutting down a vfork'd process. Don't free the
// aspace, the parent process is still using it.
prp->memory = NULL;
} else {
memmgr.mdestroy(prp);
}
if(prp->memory || aspaces_prp[KERNCPU] == prp) {
crash();
}
SETKSTATUS(act, 0);
return;
}
// Remove all signal tables
while((stp = prp->sig_table)) {
prp->sig_table = stp->next;
object_free(NULL, &sigtable_souls, stp);
}
// Check for guardian
if(prp->guardian && (prp->guardian->flags & (_NTO_PF_LOADING | _NTO_PF_TERMING | _NTO_PF_ZOMBIE)) == 0) {
process_swap(prp->guardian);
prp->guardian = 0;
}
if(prp == act->process) {
if(!args->exec) {
// if we need to, send a sigchld to the parent
if (!(prp->flags & _NTO_PF_NOZOMBIE)) {
signal_kill_process(prp->parent, SIGCHLD, prp->siginfo.si_code,
prp->siginfo.si_value.sival_int, prp->siginfo.si_pid, 0 );
}
prp->siginfo.si_signo = SIGCHLD;
}
actives_prp[KERNCPU] = sysmgr_prp;
thread_destroyall(act);
} else {
SETKSTATUS(act, prp->siginfo.si_status);
}
}
static struct dentry *autofs_root_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
{
struct autofs_sb_info *sbi;
int oz_mode;
DPRINTK(("autofs_root_lookup: name = "));
lock_kernel();
autofs_say(dentry->d_name.name,dentry->d_name.len);
if (dentry->d_name.len > NAME_MAX) {
unlock_kernel();
return ERR_PTR(-ENAMETOOLONG);/* File name too long to exist */
}
sbi = autofs_sbi(dir->i_sb);
oz_mode = autofs_oz_mode(sbi);
DPRINTK(("autofs_lookup: pid = %u, pgrp = %u, catatonic = %d, "
"oz_mode = %d\n", task_pid_nr(current),
task_pgrp_nr(current), sbi->catatonic,
oz_mode));
/*
* Mark the dentry incomplete, but add it. This is needed so
* that the VFS layer knows about the dentry, and we can count
* on catching any lookups through the revalidate.
*
* Let all the hard work be done by the revalidate function that
* needs to be able to do this anyway..
*
* We need to do this before we release the directory semaphore.
*/
dentry->d_op = &autofs_dentry_operations;
dentry->d_flags |= DCACHE_AUTOFS_PENDING;
d_add(dentry, NULL);
mutex_unlock(&dir->i_mutex);
autofs_revalidate(dentry, nd);
mutex_lock(&dir->i_mutex);
/*
* If we are still pending, check if we had to handle
* a signal. If so we can force a restart..
*/
if (dentry->d_flags & DCACHE_AUTOFS_PENDING) {
/* See if we were interrupted */
if (signal_pending(current)) {
sigset_t *sigset = ¤t->pending.signal;
if (sigismember (sigset, SIGKILL) ||
sigismember (sigset, SIGQUIT) ||
sigismember (sigset, SIGINT)) {
unlock_kernel();
return ERR_PTR(-ERESTARTNOINTR);
}
}
}
unlock_kernel();
/*
* If this dentry is unhashed, then we shouldn't honour this
* lookup even if the dentry is positive. Returning ENOENT here
* doesn't do the right thing for all system calls, but it should
* be OK for the operations we permit from an autofs.
*/
if (dentry->d_inode && d_unhashed(dentry))
return ERR_PTR(-ENOENT);
return NULL;
}
int sys_ptrace(long request, long pid, long addr, long data)
{
struct task_struct *child;
int rval;
lock_kernel();
/* printk("sys_ptrace - PID:%u ADDR:%08x DATA:%08x\n",pid,addr,data); */
if (request == PTRACE_TRACEME) {
/* are we already being traced? */
if (current->ptrace & PT_PTRACED) {
rval = -EPERM;
goto out;
}
/* set the ptrace bit in the process flags. */
current->ptrace |= PT_PTRACED;
rval = 0;
goto out;
}
rval = -ESRCH;
read_lock(&tasklist_lock);
child = find_task_by_pid(pid);
if (child)
get_task_struct(child);
read_unlock(&tasklist_lock);
if (!child)
goto out;
rval = -EPERM;
if (pid == 1) /* you may not mess with init */
goto out;
if (request == PTRACE_ATTACH) {
rval = ptrace_attach(child);
goto out_tsk;
}
rval = -ESRCH;
if (!(child->ptrace & PT_PTRACED))
goto out_tsk;
if (child->state != TASK_STOPPED) {
if (request != PTRACE_KILL)
goto out_tsk;
}
if (child->p_pptr != current)
goto out_tsk;
switch (request) {
unsigned long val, copied;
case PTRACE_PEEKTEXT: /* read word at location addr. */
case PTRACE_PEEKDATA:
/* printk("PEEKTEXT/PEEKDATA at %08X\n",addr); */
copied = access_process_vm(child, addr, &val, sizeof(val), 0);
rval = -EIO;
if (copied != sizeof(val))
break;
rval = put_user(val, (unsigned long *)data);
goto out;
case PTRACE_POKETEXT: /* write the word at location addr. */
case PTRACE_POKEDATA:
/* printk("POKETEXT/POKEDATA to %08X\n",addr); */
rval = 0;
if (access_process_vm(child, addr, &data, sizeof(data), 1)
== sizeof(data))
break;
rval = -EIO;
goto out;
/* Read/write the word at location ADDR in the registers. */
case PTRACE_PEEKUSR:
case PTRACE_POKEUSR:
rval = 0;
if (addr >= PT_SIZE && request == PTRACE_PEEKUSR) {
/* Special requests that don't actually correspond
to offsets in struct pt_regs. */
if (addr == PT_TEXT_ADDR)
{
val = child->mm->start_code;
}
else if (addr == PT_DATA_ADDR)
{
val = child->mm->start_data;
}
else if (addr == PT_TEXT_LEN)
{
val = child->mm->end_code
- child->mm->start_code;
}
else if (addr == PT_DATA_LEN)
{
val = child->mm->end_data
- child->mm->start_data;
}
else
{
rval = -EIO;
}
} else if (addr >= 0 && addr < PT_SIZE && (addr & 0x3) == 0) {
microblaze_reg_t *reg_addr = reg_save_addr(addr, child);
if (request == PTRACE_PEEKUSR)
{
val = *reg_addr;
}
else
{
*reg_addr = data;
}
} else
rval = -EIO;
if (rval == 0 && request == PTRACE_PEEKUSR)
{
rval = put_user (val, (unsigned long *)data);
}
goto out;
/* Continue and stop at next (return from) syscall */
case PTRACE_SYSCALL:
/* Restart after a signal. */
case PTRACE_CONT:
/* printk("PTRACE_CONT\n"); */
/* Execute a single instruction. */
case PTRACE_SINGLESTEP:
/* printk("PTRACE_SINGLESTEP\n"); */
rval = -EIO;
if ((unsigned long) data > _NSIG)
break;
/* Turn CHILD's single-step flag on or off. */
/* printk("calling set_single_step\n"); */
if (! set_single_step (child, request == PTRACE_SINGLESTEP))
break;
if (request == PTRACE_SYSCALL)
child->ptrace |= PT_TRACESYS;
else
child->ptrace &= ~PT_TRACESYS;
child->exit_code = data;
/* printk("wakeup_process\n"); */
wake_up_process(child);
rval = 0;
break;
/*
* make the child exit. Best I can do is send it a sigkill.
* perhaps it should be put in the status that it wants to
* exit.
*/
case PTRACE_KILL:
/* printk("PTRACE_KILL\n"); */
rval = 0;
if (child->state == TASK_ZOMBIE) /* already dead */
break;
child->exit_code = SIGKILL;
wake_up_process(child);
break;
case PTRACE_DETACH: /* detach a process that was attached. */
/* printk("PTRACE_DETACH\n"); */
set_single_step (child, 0); /* Clear single-step flag */
rval = ptrace_detach(child, data);
break;
default:
rval = -EIO;
goto out;
}
out_tsk:
free_task_struct(child);
out:
unlock_kernel();
return rval;
}
static int autofs_root_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
{
struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
struct autofs_dirhash *dh = &sbi->dirhash;
struct autofs_dir_ent *ent;
unsigned int n;
int slsize;
struct autofs_symlink *sl;
struct inode *inode;
DPRINTK(("autofs_root_symlink: %s <- ", symname));
autofs_say(dentry->d_name.name,dentry->d_name.len);
lock_kernel();
if (!autofs_oz_mode(sbi)) {
unlock_kernel();
return -EACCES;
}
if (autofs_hash_lookup(dh, &dentry->d_name)) {
unlock_kernel();
return -EEXIST;
}
n = find_first_zero_bit(sbi->symlink_bitmap,AUTOFS_MAX_SYMLINKS);
if (n >= AUTOFS_MAX_SYMLINKS) {
unlock_kernel();
return -ENOSPC;
}
set_bit(n,sbi->symlink_bitmap);
sl = &sbi->symlink[n];
sl->len = strlen(symname);
sl->data = kmalloc(slsize = sl->len+1, GFP_KERNEL);
if (!sl->data) {
clear_bit(n,sbi->symlink_bitmap);
unlock_kernel();
return -ENOSPC;
}
ent = kmalloc(sizeof(struct autofs_dir_ent), GFP_KERNEL);
if (!ent) {
kfree(sl->data);
clear_bit(n,sbi->symlink_bitmap);
unlock_kernel();
return -ENOSPC;
}
ent->name = kmalloc(dentry->d_name.len+1, GFP_KERNEL);
if (!ent->name) {
kfree(sl->data);
kfree(ent);
clear_bit(n,sbi->symlink_bitmap);
unlock_kernel();
return -ENOSPC;
}
memcpy(sl->data,symname,slsize);
sl->mtime = get_seconds();
ent->ino = AUTOFS_FIRST_SYMLINK + n;
ent->hash = dentry->d_name.hash;
memcpy(ent->name, dentry->d_name.name, 1+(ent->len = dentry->d_name.len));
ent->dentry = NULL; /* We don't keep the dentry for symlinks */
autofs_hash_insert(dh,ent);
inode = autofs_iget(dir->i_sb, ent->ino);
if (IS_ERR(inode))
return PTR_ERR(inode);
d_instantiate(dentry, inode);
unlock_kernel();
return 0;
}
asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
{
struct task_struct *child;
int ret;
lock_kernel();
ret = -EPERM;
if (request == PTRACE_TRACEME) {
/* are we already being traced? */
if (current->ptrace & PT_PTRACED)
goto out;
/* set the ptrace bit in the process flags. */
current->ptrace |= PT_PTRACED;
ret = 0;
goto out;
}
ret = -ESRCH;
read_lock(&tasklist_lock);
child = find_task_by_pid(pid);
if (child)
get_task_struct(child);
read_unlock(&tasklist_lock);
if (!child)
goto out;
ret = -EPERM;
if (pid == 1) /* you may not mess with init */
goto out_tsk;
if (request == PTRACE_ATTACH) {
ret = ptrace_attach(child);
goto out_tsk;
}
ret = ptrace_check_attach(child, request == PTRACE_KILL);
if (ret < 0)
goto out_tsk;
switch (request) {
case PTRACE_PEEKTEXT: /* read word at location addr. */
case PTRACE_PEEKDATA: {
unsigned long tmp;
ret = read_long(child, addr, &tmp);
if (ret < 0)
break ;
ret = put_user(tmp, (unsigned long *) data);
break ;
}
/* read the word at location addr in the USER area. */
case PTRACE_PEEKUSR: {
unsigned long tmp = 0;
if ((addr & 3) || addr < 0 || addr >= sizeof(struct user)) {
ret = -EIO;
break ;
}
ret = 0; /* Default return condition */
addr = addr >> 2; /* temporary hack. */
if (addr < H8300_REGS_NO)
tmp = h8300_get_reg(child, addr);
else {
switch(addr) {
case 49:
tmp = child->mm->start_code;
break ;
case 50:
tmp = child->mm->start_data;
break ;
case 51:
tmp = child->mm->end_code;
break ;
case 52:
tmp = child->mm->end_data;
break ;
default:
ret = -EIO;
}
}
if (!ret)
ret = put_user(tmp,(unsigned long *) data);
break ;
}
/* when I and D space are separate, this will have to be fixed. */
case PTRACE_POKETEXT: /* write the word at location addr. */
case PTRACE_POKEDATA:
ret = 0;
if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))
break;
ret = -EIO;
break;
case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
if ((addr & 3) || addr < 0 || addr >= sizeof(struct user)) {
ret = -EIO;
break ;
}
addr = addr >> 2; /* temporary hack. */
if (addr == PT_ORIG_ER0) {
ret = -EIO;
break ;
}
if (addr < H8300_REGS_NO) {
ret = h8300_put_reg(child, addr, data);
break ;
}
ret = -EIO;
break ;
case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
case PTRACE_CONT: { /* restart after signal. */
ret = -EIO;
if ((unsigned long) data >= _NSIG)
break ;
if (request == PTRACE_SYSCALL)
set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
else
clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
child->exit_code = data;
wake_up_process(child);
/* make sure the single step bit is not set. */
h8300_disable_trace(child);
ret = 0;
}
/*
* make the child exit. Best I can do is send it a sigkill.
* perhaps it should be put in the status that it wants to
* exit.
*/
case PTRACE_KILL: {
ret = 0;
if (child->exit_state == EXIT_ZOMBIE) /* already dead */
break;
child->exit_code = SIGKILL;
h8300_disable_trace(child);
wake_up_process(child);
break;
}
case PTRACE_SINGLESTEP: { /* set the trap flag. */
ret = -EIO;
if ((unsigned long) data > _NSIG)
break;
clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
child->exit_code = data;
h8300_enable_trace(child);
wake_up_process(child);
ret = 0;
break;
}
case PTRACE_DETACH: /* detach a process that was attached. */
ret = ptrace_detach(child, data);
break;
case PTRACE_GETREGS: { /* Get all gp regs from the child. */
int i;
unsigned long tmp;
for (i = 0; i < H8300_REGS_NO; i++) {
tmp = h8300_get_reg(child, i);
if (put_user(tmp, (unsigned long *) data)) {
ret = -EFAULT;
break;
}
data += sizeof(long);
}
ret = 0;
break;
}
case PTRACE_SETREGS: { /* Set all gp regs in the child. */
int i;
unsigned long tmp;
for (i = 0; i < H8300_REGS_NO; i++) {
if (get_user(tmp, (unsigned long *) data)) {
ret = -EFAULT;
break;
}
h8300_put_reg(child, i, tmp);
data += sizeof(long);
}
ret = 0;
break;
}
default:
ret = -EIO;
break;
}
out_tsk:
put_task_struct(child);
out:
unlock_kernel();
return ret;
}
asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
{
struct task_struct *child;
int ret = -EPERM;
unsigned long tmp;
int copied;
ptrace_area parea;
lock_kernel();
if (request == PTRACE_TRACEME)
{
/* are we already being traced? */
if (current->ptrace & PT_PTRACED)
goto out;
/* set the ptrace bit in the process flags. */
current->ptrace |= PT_PTRACED;
ret = 0;
goto out;
}
ret = -ESRCH;
read_lock(&tasklist_lock);
child = find_task_by_pid(pid);
if (child)
get_task_struct(child);
read_unlock(&tasklist_lock);
if (!child)
goto out;
ret = -EPERM;
if (pid == 1) /* you may not mess with init */
goto out_tsk;
if (request == PTRACE_ATTACH)
{
ret = ptrace_attach(child);
goto out_tsk;
}
ret = -ESRCH;
// printk("child=%lX child->flags=%lX",child,child->flags);
/* I added child!=current line so we can get the */
/* ieee_instruction_pointer from the user structure DJB */
if(child!=current)
{
if (!(child->ptrace & PT_PTRACED))
goto out_tsk;
if (child->state != TASK_STOPPED)
{
if (request != PTRACE_KILL)
goto out_tsk;
}
if (child->p_pptr != current)
goto out_tsk;
}
switch (request)
{
/* If I and D space are separate, these will need to be fixed. */
case PTRACE_PEEKTEXT: /* read word at location addr. */
case PTRACE_PEEKDATA:
copied = access_process_vm(child,ADDR_BITS_REMOVE(addr), &tmp, sizeof(tmp), 0);
ret = -EIO;
if (copied != sizeof(tmp))
break;
ret = put_user(tmp,(unsigned long *) data);
break;
/* read the word at location addr in the USER area. */
case PTRACE_PEEKUSR:
ret=copy_user(child,addr,data,sizeof(unsigned long),1,0);
break;
/* If I and D space are separate, this will have to be fixed. */
case PTRACE_POKETEXT: /* write the word at location addr. */
case PTRACE_POKEDATA:
ret = 0;
if (access_process_vm(child,ADDR_BITS_REMOVE(addr), &data, sizeof(data), 1) == sizeof(data))
break;
ret = -EIO;
break;
case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
ret=copy_user(child,addr,(addr_t)&data,sizeof(unsigned long),0,1);
break;
case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
case PTRACE_CONT: /* restart after signal. */
ret = -EIO;
if ((unsigned long) data >= _NSIG)
break;
if (request == PTRACE_SYSCALL)
child->ptrace |= PT_TRACESYS;
else
child->ptrace &= ~PT_TRACESYS;
child->exit_code = data;
/* make sure the single step bit is not set. */
clear_single_step(child);
wake_up_process(child);
ret = 0;
break;
/*
* make the child exit. Best I can do is send it a sigkill.
* perhaps it should be put in the status that it wants to
* exit.
*/
case PTRACE_KILL:
ret = 0;
if (child->state == TASK_ZOMBIE) /* already dead */
break;
child->exit_code = SIGKILL;
clear_single_step(child);
wake_up_process(child);
/* make sure the single step bit is not set. */
break;
case PTRACE_SINGLESTEP: /* set the trap flag. */
ret = -EIO;
if ((unsigned long) data >= _NSIG)
break;
child->ptrace &= ~PT_TRACESYS;
child->exit_code = data;
set_single_step(child);
/* give it a chance to run. */
wake_up_process(child);
ret = 0;
break;
case PTRACE_DETACH: /* detach a process that was attached. */
ret = ptrace_detach(child, data);
break;
case PTRACE_PEEKUSR_AREA:
case PTRACE_POKEUSR_AREA:
if(copy_from_user(&parea,(void *)addr,sizeof(parea))==0)
ret=copy_user(child,parea.kernel_addr,parea.process_addr,
parea.len,1,(request==PTRACE_POKEUSR_AREA));
else ret = -EFAULT;
break;
default:
ret = -EIO;
break;
}
out_tsk:
free_task_struct(child);
out:
unlock_kernel();
return ret;
}
static int usb_dio_probe(struct usb_interface *intf, const struct usb_device_id *id) {
struct usb_cdc_union_desc *union_header = NULL;
unsigned char *buffer = intf->altsetting->extra;
int buflen = intf->altsetting->extralen;
struct usb_interface *control_interface;
struct usb_interface *data_interface;
struct usb_device *usb_dev = interface_to_usbdev(intf);
int retval = 0;
usb_dio_dev *dev;
/* prevent usb_dio_probe() from racing usb_dio_disconnect() */
lock_kernel();
FUNC_HI();
dev = kmalloc(sizeof(usb_dio_dev), GFP_KERNEL);
if (dev == NULL) {
err("Out of Memory");
unlock_kernel();
FUNC_ERR();
return -ENOMEM;
}
memset(dev, 0x00, sizeof (usb_dio_dev));
dev->dev = usb_get_dev(interface_to_usbdev(intf));
kref_init(&(dev->kref));
usb_set_intfdata(intf, dev);
printk(KERN_ALERT "%s: === Starting device probe ===\n", usb_dio_driver.name);
if (!buflen) {
printk(KERN_ALERT "%s: === Invalid / unwanted device ===\n", usb_dio_driver.name);
unlock_kernel();
FUNC_ERR();
return -EINVAL;
}
DPRINTK(KERN_ALERT "%s: == Chunk size = %2d ==\n", usb_dio_driver.name, buffer[0]);
DPRINTK(KERN_ALERT "%s: == Buffer length = %2d ==\n", usb_dio_driver.name, buflen);
while (buflen > 0) {
switch (buffer[2]) {
case USB_CDC_UNION_TYPE: /* we've found it */
DPRINTK(KERN_ALERT "%s: ==== USB_CDC_UNION_TYPE ==============\n", usb_dio_driver.name);
if (union_header) {
DPRINTK(KERN_ALERT "%s: ===== More than one union header! =====\n", usb_dio_driver.name);
break;
}
union_header = (struct usb_cdc_union_desc *)buffer;
break;
default:
DPRINTK(KERN_ALERT "%s: ==== Unwanted default... =============\n", usb_dio_driver.name);
break;
}
DPRINTK(KERN_ALERT "%s: === continuation with %2d remaining... ===\n", usb_dio_driver.name, buflen - buffer[0]);
buflen -= buffer[0];
buffer += buffer[0];
}
DPRINTK(KERN_ALERT "%s: == complete with %2d remaining ==\n", usb_dio_driver.name, buflen);
control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
data_interface = usb_ifnum_to_if(usb_dev, union_header->bSlaveInterface0);
if (!control_interface || !data_interface) {
printk(KERN_ALERT "%s: === missing interface(s)! ===\n", usb_dio_driver.name);
unlock_kernel();
FUNC_ERR();
return -ENODEV;
}
sema_init(&dev->buffer_sem,1);
sema_init(&dev->buffer_empty_sem,1);
dev->bulk_in = &(data_interface->cur_altsetting->endpoint[0].desc);
dev->bulk_in_urb = NULL;
dev->bulk_in_size = dev->bulk_in->wMaxPacketSize;
dev->bulk_in_endpointAddr = dev->bulk_in->bEndpointAddress & 0xF;
dev->bulk_in_endpointPipe = usb_rcvbulkpipe(dev->dev,dev->bulk_in_endpointAddr);
dev->bulk_in_buffer = kmalloc(dev->bulk_in->wMaxPacketSize, GFP_KERNEL);
dev->bulk_in_workqueue = create_singlethread_workqueue("Rx");
INIT_WORK(&(dev->bulk_in_work.work),(void(*)(struct work_struct *))diodev_rx_work);
dev->bulk_in_work.arg = NULL;
dev->bulk_in_work.dev = dev;
dev->bulk_out = &(data_interface->cur_altsetting->endpoint[1].desc);
dev->bulk_out_endpointAddr = dev->bulk_out->bEndpointAddress & 0xF;
dev->bulk_out_endpointPipe = usb_sndbulkpipe(dev->dev,dev->bulk_out_endpointAddr);
dev->bulk_out_cb_urb_chain = NULL;
sema_init(&dev->bulk_out_cb_urb_chain_sem,1);
dev->bulk_out_urb_chain = NULL;
sema_init(&dev->bulk_out_urb_chain_sem,1);
dev->bulk_out_workqueue = create_singlethread_workqueue("Tx");
INIT_WORK(&(dev->bulk_out_work.work),(void(*)(struct work_struct *))diodev_write_work);
dev->bulk_out_work.arg = NULL;
dev->bulk_out_work.dev = dev;
dev->bulk_ctrl = &(control_interface->cur_altsetting->endpoint[0].desc);
dev->bulk_ctrl_endpointAddr = dev->bulk_ctrl->bEndpointAddress & 0xF;
retval = usb_register_dev(intf, &usb_dio_class);
if (retval) {
printk(KERN_ALERT "%s: Not able to get a minor for this device...\n", usb_dio_driver.name);
usb_set_intfdata(intf, NULL);
} else {
printk(KERN_ALERT "%s: Minor device %d\n", usb_dio_driver.name, intf->minor);
}
dev->running = 1;
diodev_rx_setup(dev);
unlock_kernel();
FUNC_BYE();
return retval;
}
/*
* FIXME: use linux/kthread.h
*/
static int dvb_frontend_thread (void *data)
{
struct dvb_frontend *fe = (struct dvb_frontend *) data;
unsigned long timeout;
char name [15];
int quality = 0, delay = 3*HZ;
fe_status_t s;
int check_wrapped = 0;
dprintk ("%s\n", __FUNCTION__);
snprintf (name, sizeof(name), "kdvb-fe-%i", fe->dvb->num);
lock_kernel ();
daemonize (name);
sigfillset (¤t->blocked);
unlock_kernel ();
fe->status = 0;
dvb_frontend_init (fe);
fe->wakeup = 0;
while (1) {
up (&fe->sem); /* is locked when we enter the thread... */
timeout = wait_event_interruptible_timeout(fe->wait_queue,
dvb_frontend_should_wakeup(fe),
delay);
if (0 != dvb_frontend_is_exiting (fe)) {
/* got signal or quitting */
break;
}
if (current->flags & PF_FREEZE)
refrigerator(PF_FREEZE);
if (down_interruptible (&fe->sem))
break;
/* if we've got no parameters, just keep idling */
if (fe->state & FESTATE_IDLE) {
delay = 3*HZ;
quality = 0;
continue;
}
retune:
/* get the frontend status */
if (fe->state & FESTATE_RETUNE) {
s = 0;
} else {
if (fe->ops->read_status)
fe->ops->read_status(fe, &s);
if (s != fe->status) {
dvb_frontend_add_event (fe, s);
fe->status = s;
}
}
/* if we're not tuned, and we have a lock, move to the TUNED state */
if ((fe->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
update_delay(&quality, &delay, fe->min_delay, s & FE_HAS_LOCK);
fe->state = FESTATE_TUNED;
/* if we're tuned, then we have determined the correct inversion */
if ((!(fe->ops->info.caps & FE_CAN_INVERSION_AUTO)) &&
(fe->parameters.inversion == INVERSION_AUTO)) {
fe->parameters.inversion = fe->inversion;
}
continue;
}
/* if we are tuned already, check we're still locked */
if (fe->state & FESTATE_TUNED) {
update_delay(&quality, &delay, fe->min_delay, s & FE_HAS_LOCK);
/* we're tuned, and the lock is still good... */
if (s & FE_HAS_LOCK)
continue;
else {
/* if we _WERE_ tuned, but now don't have a lock,
* need to zigzag */
fe->state = FESTATE_ZIGZAG_FAST;
fe->started_auto_step = fe->auto_step;
check_wrapped = 0;
}
}
/* don't actually do anything if we're in the LOSTLOCK state,
* the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
if ((fe->state & FESTATE_LOSTLOCK) &&
(fe->ops->info.caps & FE_CAN_RECOVER) && (fe->max_drift == 0)) {
update_delay(&quality, &delay, fe->min_delay, s & FE_HAS_LOCK);
continue;
}
/* don't do anything if we're in the DISEQC state, since this
* might be someone with a motorized dish controlled by DISEQC.
* If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
if (fe->state & FESTATE_DISEQC) {
update_delay(&quality, &delay, fe->min_delay, s & FE_HAS_LOCK);
continue;
}
/* if we're in the RETUNE state, set everything up for a brand
* new scan, keeping the current inversion setting, as the next
* tune is _very_ likely to require the same */
if (fe->state & FESTATE_RETUNE) {
fe->lnb_drift = 0;
fe->auto_step = 0;
fe->auto_sub_step = 0;
fe->started_auto_step = 0;
check_wrapped = 0;
}
/* fast zigzag. */
if ((fe->state & FESTATE_SEARCHING_FAST) || (fe->state & FESTATE_RETUNE)) {
delay = fe->min_delay;
/* peform a tune */
if (dvb_frontend_autotune(fe, check_wrapped)) {
/* OK, if we've run out of trials at the fast speed.
* Drop back to slow for the _next_ attempt */
fe->state = FESTATE_SEARCHING_SLOW;
fe->started_auto_step = fe->auto_step;
continue;
}
check_wrapped = 1;
/* if we've just retuned, enter the ZIGZAG_FAST state.
* This ensures we cannot return from an
* FE_SET_FRONTEND ioctl before the first frontend tune
* occurs */
if (fe->state & FESTATE_RETUNE) {
fe->state = FESTATE_TUNING_FAST;
goto retune;
}
}
/* slow zigzag */
if (fe->state & FESTATE_SEARCHING_SLOW) {
update_delay(&quality, &delay, fe->min_delay, s & FE_HAS_LOCK);
/* Note: don't bother checking for wrapping; we stay in this
* state until we get a lock */
dvb_frontend_autotune(fe, 0);
}
}
if (dvb_shutdown_timeout) {
if (dvb_powerdown_on_sleep)
if (fe->ops->set_voltage)
fe->ops->set_voltage(fe, SEC_VOLTAGE_OFF);
if (fe->ops->sleep)
fe->ops->sleep(fe);
}
fe->thread_pid = 0;
mb();
dvb_frontend_wakeup(fe);
return 0;
}
/*
* Read a directory, using filldir to fill the dirent memory.
* smb_proc_readdir does the actual reading from the smb server.
*
* The cache code is almost directly taken from ncpfs
*/
static int
smb_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
struct dentry *dentry = filp->f_path.dentry;
struct inode *dir = dentry->d_inode;
struct smb_sb_info *server = server_from_dentry(dentry);
union smb_dir_cache *cache = NULL;
struct smb_cache_control ctl;
struct page *page = NULL;
int result;
ctl.page = NULL;
ctl.cache = NULL;
VERBOSE("reading %s/%s, f_pos=%d\n",
DENTRY_PATH(dentry), (int) filp->f_pos);
result = 0;
lock_kernel();
switch ((unsigned int) filp->f_pos) {
case 0:
if (filldir(dirent, ".", 1, 0, dir->i_ino, DT_DIR) < 0)
goto out;
filp->f_pos = 1;
/* fallthrough */
case 1:
if (filldir(dirent, "..", 2, 1, parent_ino(dentry), DT_DIR) < 0)
goto out;
filp->f_pos = 2;
}
/*
* Make sure our inode is up-to-date.
*/
result = smb_revalidate_inode(dentry);
if (result)
goto out;
page = grab_cache_page(&dir->i_data, 0);
if (!page)
goto read_really;
ctl.cache = cache = kmap(page);
ctl.head = cache->head;
if (!PageUptodate(page) || !ctl.head.eof) {
VERBOSE("%s/%s, page uptodate=%d, eof=%d\n",
DENTRY_PATH(dentry), PageUptodate(page),ctl.head.eof);
goto init_cache;
}
if (filp->f_pos == 2) {
if (jiffies - ctl.head.time >= SMB_MAX_AGE(server))
goto init_cache;
/*
* N.B. ncpfs checks mtime of dentry too here, we don't.
* 1. common smb servers do not update mtime on dir changes
* 2. it requires an extra smb request
* (revalidate has the same timeout as ctl.head.time)
*
* Instead smbfs invalidates its own cache on local changes
* and remote changes are not seen until timeout.
*/
}
if (filp->f_pos > ctl.head.end)
goto finished;
ctl.fpos = filp->f_pos + (SMB_DIRCACHE_START - 2);
ctl.ofs = ctl.fpos / SMB_DIRCACHE_SIZE;
ctl.idx = ctl.fpos % SMB_DIRCACHE_SIZE;
for (;;) {
if (ctl.ofs != 0) {
ctl.page = find_lock_page(&dir->i_data, ctl.ofs);
if (!ctl.page)
goto invalid_cache;
ctl.cache = kmap(ctl.page);
if (!PageUptodate(ctl.page))
goto invalid_cache;
}
while (ctl.idx < SMB_DIRCACHE_SIZE) {
struct dentry *dent;
int res;
dent = smb_dget_fpos(ctl.cache->dentry[ctl.idx],
dentry, filp->f_pos);
if (!dent)
goto invalid_cache;
res = filldir(dirent, dent->d_name.name,
dent->d_name.len, filp->f_pos,
dent->d_inode->i_ino, DT_UNKNOWN);
dput(dent);
if (res)
goto finished;
filp->f_pos += 1;
ctl.idx += 1;
if (filp->f_pos > ctl.head.end)
goto finished;
}
if (ctl.page) {
kunmap(ctl.page);
SetPageUptodate(ctl.page);
unlock_page(ctl.page);
page_cache_release(ctl.page);
ctl.page = NULL;
}
ctl.idx = 0;
ctl.ofs += 1;
}
invalid_cache:
if (ctl.page) {
kunmap(ctl.page);
unlock_page(ctl.page);
page_cache_release(ctl.page);
ctl.page = NULL;
}
ctl.cache = cache;
init_cache:
smb_invalidate_dircache_entries(dentry);
ctl.head.time = jiffies;
ctl.head.eof = 0;
ctl.fpos = 2;
ctl.ofs = 0;
ctl.idx = SMB_DIRCACHE_START;
ctl.filled = 0;
ctl.valid = 1;
read_really:
result = server->ops->readdir(filp, dirent, filldir, &ctl);
if (result == -ERESTARTSYS && page)
ClearPageUptodate(page);
if (ctl.idx == -1)
goto invalid_cache; /* retry */
ctl.head.end = ctl.fpos - 1;
ctl.head.eof = ctl.valid;
finished:
if (page) {
cache->head = ctl.head;
kunmap(page);
if (result != -ERESTARTSYS)
SetPageUptodate(page);
unlock_page(page);
page_cache_release(page);
}
if (ctl.page) {
kunmap(ctl.page);
SetPageUptodate(ctl.page);
unlock_page(ctl.page);
page_cache_release(ctl.page);
}
out:
unlock_kernel();
return result;
}
void
i386_init(void)
{
extern char edata[], end[];
// Before doing anything else, complete the ELF loading process.
// Clear the uninitialized global data (BSS) section of our program.
// This ensures that all static/global variables start out zero.
memset(edata, 0, end - edata);
// Initialize the console.
// Can't call cprintf until after we do this!
cons_init();
cprintf("6828 decimal is %o octal!\n", 6828);
// Lab 2 memory management initialization functions
mem_init();
// Lab 3 user environment initialization functions
env_init();
trap_init();
// Lab 4 multiprocessor initialization functions
mp_init();
lapic_init();
// Lab 4 multitasking initialization functions
pic_init();
// Acquire the big kernel lock before waking up APs
// Your code here:
//spin_initlock(&kernel_lock);
lock_kernel();
// Starting non-boot CPUs
boot_aps();
#if defined(TEST)
// Don't touch -- used by grading script!
ENV_CREATE(TEST, ENV_TYPE_USER);
#else
// Touch all you want.
//ENV_CREATE(user_primes, ENV_TYPE_USER);
//ENV_CREATE(user_idle, ENV_TYPE_USER);
//ENV_CREATE(user_yield, ENV_TYPE_USER);
ENV_CREATE(user_yield, ENV_TYPE_USER);
ENV_CREATE(user_yield, ENV_TYPE_USER);
ENV_CREATE(user_yield, ENV_TYPE_USER);
#endif // TEST*
/*
cprintf("\n\nenvs[0] = %d, envs[1] = %d, envs[2]= %d\n",envs[0].env_status,
envs[1].env_status,
envs[2].env_status
);
*/
// Schedule and run the first user environment!
sched_yield();
}
static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{ /* @ ADG ou ATO selon le cas */
int i;
unsigned char IndexCard;
void __iomem *pmem;
int ret = 0;
volatile unsigned char byte_reset_it;
struct st_ram_io *adgl;
void __user *argp = (void __user *)arg;
/* In general, the device is only openable by root anyway, so we're not
particularly concerned that bogus ioctls can flood the console. */
adgl = memdup_user(argp, sizeof(struct st_ram_io));
if (IS_ERR(adgl))
return PTR_ERR(adgl);
lock_kernel();
IndexCard = adgl->num_card-1;
if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
static int warncount = 10;
if (warncount) {
printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
warncount--;
}
kfree(adgl);
unlock_kernel();
return -EINVAL;
}
switch (cmd) {
case 0:
pmem = apbs[IndexCard].RamIO;
for (i = 0; i < sizeof(struct st_ram_io); i++)
((unsigned char *)adgl)[i]=readb(pmem++);
if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
ret = -EFAULT;
break;
case 1:
pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
for (i = 0; i < 4; i++)
adgl->conf_end_test[i] = readb(pmem++);
for (i = 0; i < 2; i++)
adgl->error_code[i] = readb(pmem++);
for (i = 0; i < 4; i++)
adgl->parameter_error[i] = readb(pmem++);
pmem = apbs[IndexCard].RamIO + VERS;
adgl->vers = readb(pmem);
pmem = apbs[IndexCard].RamIO + TYPE_CARD;
for (i = 0; i < 20; i++)
adgl->reserv1[i] = readb(pmem++);
*(int *)&adgl->reserv1[20] =
(readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
(readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
(readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
ret = -EFAULT;
break;
case 2:
pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
for (i = 0; i < 10; i++)
writeb(0xff, pmem++);
writeb(adgl->data_from_pc_ready,
apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
for (i = 0; i < MAX_BOARD; i++) {
if (apbs[i].RamIO) {
byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
}
}
break;
case 3:
pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
writeb(adgl->tic_des_from_pc, pmem);
break;
case 4:
pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
adgl->tic_owner_to_pc = readb(pmem++);
adgl->numcard_owner_to_pc = readb(pmem);
if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
ret = -EFAULT;
break;
case 5:
writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
break;
case 6:
printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.1.1.1 $)\n");
printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
for (i = 0; i < MAX_BOARD; i++) {
int serial;
char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
if (!apbs[i].RamIO)
continue;
for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
boardname[serial] = 0;
printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
i+1,
(int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
(int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
boardname);
serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
(readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
(readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
if (serial != 0)
printk(" S/N %d\n", serial);
else
printk("\n");
}
if (DeviceErrorCount != 0)
printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
if (ReadErrorCount != 0)
printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
if (WriteErrorCount != 0)
printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
if (waitqueue_active(&FlagSleepRec))
printk(KERN_INFO "Process in read pending\n");
for (i = 0; i < MAX_BOARD; i++) {
if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
printk(KERN_INFO "Process in write pending board %d\n",i+1);
}
break;
default:
ret = -ENOTTY;
break;
}
Dummy = readb(apbs[IndexCard].RamIO + VERS);
kfree(adgl);
unlock_kernel();
return 0;
}
static int __init kernel_init(void * unused)
{
/*
* Wait until kthreadd is all set-up.
*/
wait_for_completion(&kthreadd_done);
lock_kernel();
/*
* init can allocate pages on any node
*/
set_mems_allowed(node_states[N_HIGH_MEMORY]);
/*
* init can run on any cpu.
*/
set_cpus_allowed_ptr(current, cpu_all_mask);
/*
* Tell the world that we're going to be the grim
* reaper of innocent orphaned children.
*
* We don't want people to have to make incorrect
* assumptions about where in the task array this
* can be found.
*/
init_pid_ns.child_reaper = current;
cad_pid = task_pid(current);
smp_prepare_cpus(setup_max_cpus);
do_pre_smp_initcalls();
start_boot_trace();
smp_init();
sched_init_smp();
do_basic_setup();
/* Open the /dev/console on the rootfs, this should never fail */
if (sys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0)
printk(KERN_WARNING "Warning: unable to open an initial console.\n");
(void) sys_dup(0);
(void) sys_dup(0);
/*
* check if there is an early userspace init. If yes, let it do all
* the work
*/
if (!ramdisk_execute_command)
ramdisk_execute_command = "/init";
if (sys_access((const char __user *) ramdisk_execute_command, 0) != 0) {
ramdisk_execute_command = NULL;
prepare_namespace();
}
/*
* Ok, we have completed the initial bootup, and
* we're essentially up and running. Get rid of the
* initmem segments and start the user-mode stuff..
*/
init_post();
return 0;
}
/*
* This is the lockd kernel thread
*/
static void
lockd(struct svc_rqst *rqstp)
{
struct svc_serv *serv = rqstp->rq_server;
int err = 0;
unsigned long grace_period_expire;
/* Lock module and set up kernel thread */
MOD_INC_USE_COUNT;
lock_kernel();
/*
* Let our maker know we're running.
*/
nlmsvc_pid = current->pid;
up(&lockd_start);
daemonize();
reparent_to_init();
sprintf(current->comm, "lockd");
/* Process request with signals blocked. */
spin_lock_irq(¤t->sighand->siglock);
siginitsetinv(¤t->blocked, sigmask(SIGKILL));
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
/* kick rpciod */
rpciod_up();
dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n");
if (!nlm_timeout)
nlm_timeout = LOCKD_DFLT_TIMEO;
nlmsvc_timeout = nlm_timeout * HZ;
grace_period_expire = set_grace_period();
/*
* The main request loop. We don't terminate until the last
* NFS mount or NFS daemon has gone away, and we've been sent a
* signal, or else another process has taken over our job.
*/
while ((nlmsvc_users || !signalled()) && nlmsvc_pid == current->pid)
{
long timeout = MAX_SCHEDULE_TIMEOUT;
if (signalled()) {
spin_lock_irq(¤t->sighand->siglock);
flush_signals(current);
spin_unlock_irq(¤t->sighand->siglock);
if (nlmsvc_ops) {
nlmsvc_ops->detach();
grace_period_expire = set_grace_period();
}
}
/*
* Retry any blocked locks that have been notified by
* the VFS. Don't do this during grace period.
* (Theoretically, there shouldn't even be blocked locks
* during grace period).
*/
if (!nlmsvc_grace_period)
timeout = nlmsvc_retry_blocked();
/*
* Find a socket with data available and call its
* recvfrom routine.
*/
err = svc_recv(serv, rqstp, timeout);
if (err == -EAGAIN || err == -EINTR)
continue;
if (err < 0) {
printk(KERN_WARNING
"lockd: terminating on error %d\n",
-err);
break;
}
dprintk("lockd: request from %08x\n",
(unsigned)ntohl(rqstp->rq_addr.sin_addr.s_addr));
/*
* Look up the NFS client handle. The handle is needed for
* all but the GRANTED callback RPCs.
*/
rqstp->rq_client = NULL;
if (nlmsvc_ops) {
nlmsvc_ops->exp_readlock();
rqstp->rq_client =
nlmsvc_ops->exp_getclient(&rqstp->rq_addr);
}
if (nlmsvc_grace_period &&
time_before(grace_period_expire, jiffies))
nlmsvc_grace_period = 0;
svc_process(serv, rqstp);
/* Unlock export hash tables */
if (nlmsvc_ops)
nlmsvc_ops->exp_unlock();
}
/*
* Check whether there's a new lockd process before
* shutting down the hosts and clearing the slot.
*/
if (!nlmsvc_pid || current->pid == nlmsvc_pid) {
if (nlmsvc_ops)
nlmsvc_ops->detach();
nlm_shutdown_hosts();
nlmsvc_pid = 0;
} else
printk(KERN_DEBUG
"lockd: new process, skipping host shutdown\n");
wake_up(&lockd_exit);
/* Exit the RPC thread */
svc_exit_thread(rqstp);
/* release rpciod */
rpciod_down();
/* Release module */
MOD_DEC_USE_COUNT;
}
asmlinkage void __init start_kernel(void)
{
char * command_line;
extern struct kernel_param __start___param[], __stop___param[];
smp_setup_processor_id();
/*
* Need to run as early as possible, to initialize the
* lockdep hash:
*/
unwind_init();
lockdep_init();
debug_objects_early_init();
cgroup_init_early();
local_irq_disable();
early_boot_irqs_off();
early_init_irq_lock_class();
/*
* Interrupts are still disabled. Do necessary setups, then
* enable them
*/
lock_kernel();
tick_init();
boot_cpu_init();
page_address_init();
printk(KERN_NOTICE);
printk(linux_banner);
setup_arch(&command_line);
mm_init_owner(&init_mm, &init_task);
setup_command_line(command_line);
unwind_setup();
setup_per_cpu_areas();
setup_nr_cpu_ids();
smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */
/*
* Set up the scheduler prior starting any interrupts (such as the
* timer interrupt). Full topology setup happens at smp_init()
* time - but meanwhile we still have a functioning scheduler.
*/
sched_init();
/*
* Disable preemption - early bootup scheduling is extremely
* fragile until we cpu_idle() for the first time.
*/
preempt_disable();
build_all_zonelists();
page_alloc_init();
printk(KERN_NOTICE "Kernel command line: %s\n", boot_command_line);
parse_early_param();
parse_args("Booting kernel", static_command_line, __start___param,
__stop___param - __start___param,
&unknown_bootoption);
if (!irqs_disabled()) {
printk(KERN_WARNING "start_kernel(): bug: interrupts were "
"enabled *very* early, fixing it\n");
local_irq_disable();
}
sort_main_extable();
trap_init();
rcu_init();
init_IRQ();
pidhash_init();
init_timers();
hrtimers_init();
softirq_init();
timekeeping_init();
time_init();
sched_clock_init();
profile_init();
if (!irqs_disabled())
printk("start_kernel(): bug: interrupts were enabled early\n");
early_boot_irqs_on();
local_irq_enable();
/*
* HACK ALERT! This is early. We're enabling the console before
* we've done PCI setups etc, and console_init() must be aware of
* this. But we do want output early, in case something goes wrong.
*/
console_init();
if (panic_later)
panic(panic_later, panic_param);
lockdep_info();
/*
* Need to run this when irqs are enabled, because it wants
* to self-test [hard/soft]-irqs on/off lock inversion bugs
* too:
*/
locking_selftest();
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start && !initrd_below_start_ok &&
page_to_pfn(virt_to_page((void *)initrd_start)) < min_low_pfn) {
printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
"disabling it.\n",
page_to_pfn(virt_to_page((void *)initrd_start)),
min_low_pfn);
initrd_start = 0;
}
#endif
vmalloc_init();
vfs_caches_init_early();
cpuset_init_early();
page_cgroup_init();
mem_init();
enable_debug_pagealloc();
cpu_hotplug_init();
kmem_cache_init();
debug_objects_mem_init();
idr_init_cache();
setup_per_cpu_pageset();
numa_policy_init();
if (late_time_init)
late_time_init();
calibrate_delay();
pidmap_init();
pgtable_cache_init();
prio_tree_init();
anon_vma_init();
#ifdef CONFIG_X86
if (efi_enabled)
efi_enter_virtual_mode();
#endif
thread_info_cache_init();
cred_init();
fork_init(num_physpages);
proc_caches_init();
buffer_init();
key_init();
security_init();
vfs_caches_init(num_physpages);
radix_tree_init();
signals_init();
/* rootfs populating might need page-writeback */
page_writeback_init();
#ifdef CONFIG_PROC_FS
proc_root_init();
#endif
cgroup_init();
cpuset_init();
taskstats_init_early();
delayacct_init();
check_bugs();
acpi_early_init(); /* before LAPIC and SMP init */
ftrace_init();
/* Do the rest non-__init'ed, we're now alive */
rest_init();
}
void
trap(struct Trapframe *tf)
{
// The environment may have set DF and some versions
// of GCC rely on DF being clear
asm volatile("cld" ::: "cc");
// Halt the CPU if some other CPU has called panic()
extern char *panicstr;
if (panicstr)
asm volatile("hlt");
// Re-acqurie the big kernel lock if we were halted in
// sched_yield()
if (xchg(&thiscpu->cpu_status, CPU_STARTED) == CPU_HALTED)
lock_kernel();
// Check that interrupts are disabled. If this assertion
// fails, DO NOT be tempted to fix it by inserting a "cli" in
// the interrupt path.
assert(!(read_eflags() & FL_IF));
if ((tf->tf_cs & 3) == 3) {
// Trapped from user mode.
// Acquire the big kernel lock before doing any
// serious kernel work.
// LAB 4: Your code here.
lock_kernel();
assert(curenv);
// Garbage collect if current enviroment is a zombie
if (curenv->env_status == ENV_DYING) {
env_free(curenv);
curenv = NULL;
sched_yield();
}
// Copy trap frame (which is currently on the stack)
// into 'curenv->env_tf', so that running the environment
// will restart at the trap point.
curenv->env_tf = *tf;
// The trapframe on the stack should be ignored from here on.
tf = &curenv->env_tf;
}
// Record that tf is the last real trapframe so
// print_trapframe can print some additional information.
last_tf = tf;
// Dispatch based on what type of trap occurred
trap_dispatch(tf);
// If we made it to this point, then no other environment was
// scheduled, so we should return to the current environment
// if doing so makes sense.
if (curenv && curenv->env_status == ENV_RUNNING)
env_run(curenv);
else
sched_yield();
}
/*
* Reboot system call: for obvious reasons only root may call it,
* and even root needs to set up some magic numbers in the registers
* so that some mistake won't make this reboot the whole machine.
* You can also set the meaning of the ctrl-alt-del-key here.
*
* reboot doesn't sync: do that yourself before calling this.
*/
asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void __user * arg)
{
char buffer[256];
/* We only trust the superuser with rebooting the system. */
if (!capable(CAP_SYS_BOOT))
return -EPERM;
/* For safety, we require "magic" arguments. */
if (magic1 != LINUX_REBOOT_MAGIC1 ||
(magic2 != LINUX_REBOOT_MAGIC2 &&
magic2 != LINUX_REBOOT_MAGIC2A &&
magic2 != LINUX_REBOOT_MAGIC2B &&
magic2 != LINUX_REBOOT_MAGIC2C))
return -EINVAL;
/* Instead of trying to make the power_off code look like
* halt when pm_power_off is not set do it the easy way.
*/
if ((cmd == LINUX_REBOOT_CMD_POWER_OFF) && !pm_power_off)
cmd = LINUX_REBOOT_CMD_HALT;
lock_kernel();
switch (cmd) {
case LINUX_REBOOT_CMD_RESTART:
kernel_restart(NULL);
break;
case LINUX_REBOOT_CMD_CAD_ON:
C_A_D = 1;
break;
case LINUX_REBOOT_CMD_CAD_OFF:
C_A_D = 0;
break;
case LINUX_REBOOT_CMD_HALT:
kernel_halt();
unlock_kernel();
do_exit(0);
break;
case LINUX_REBOOT_CMD_POWER_OFF:
kernel_power_off();
unlock_kernel();
do_exit(0);
break;
case LINUX_REBOOT_CMD_RESTART2:
if (strncpy_from_user(&buffer[0], arg, sizeof(buffer) - 1) < 0) {
unlock_kernel();
return -EFAULT;
}
buffer[sizeof(buffer) - 1] = '\0';
kernel_restart(buffer);
break;
case LINUX_REBOOT_CMD_KEXEC:
kernel_kexec();
unlock_kernel();
return -EINVAL;
#ifdef CONFIG_HIBERNATION
case LINUX_REBOOT_CMD_SW_SUSPEND:
{
int ret = hibernate();
unlock_kernel();
return ret;
}
#endif
default:
unlock_kernel();
return -EINVAL;
}
unlock_kernel();
return 0;
}
static void
kerext_process_create(void *data) {
struct kerargs_process_create *kap = data;
pid_t pid;
PROCESS *prp, *parent;
THREAD *act = actives[KERNCPU];
int status, i;
struct _cred_info info;
if((parent = lookup_pid(kap->parent_pid)) == NULL) {
kererr(act, ESRCH);
return;
}
if (parent->num_processes >= parent->rlimit_vals_soft[RLIMIT_NPROC]) {
kererr(act, EAGAIN);
return;
}
lock_kernel();
// Check that we haven't run out of process vector entries
// The process index & PID_MASK should never be all zeros
// or all ones. All ones could cause SYNC_*() to return
// valid looking numbers from an uninitialized sync.
if((process_vector.nentries - process_vector.nfree) >= PID_MASK - 1) {
kererr(act, EAGAIN);
return;
}
// Alloc a process entry.
if((prp = object_alloc(NULL, &process_souls)) == NULL) {
kererr(act, ENOMEM);
return;
}
if(kap->parent_pid) {
prp->flags = _NTO_PF_LOADING | _NTO_PF_NOZOMBIE | _NTO_PF_RING0;
prp->lcp = kap->lcp;
}
snap_time(&prp->start_time, 1);
MUTEX_INIT(prp, &prp->mpartlist_lock);
MUTEX_INIT(prp, &prp->spartlist_lock);
CRASHCHECK((kap->extra == NULL) || (kap->extra->mpart_list == NULL) ||
((kap->extra->spart_list == NULL) && SCHEDPART_INSTALLED()));
{
part_list_t *mpart_list = kap->extra->mpart_list;
part_list_t *spart_list = kap->extra->spart_list;
/* first thing is to associate with all specified partitions */
for (i=0; i<mpart_list->num_entries; i++)
{
if ((status = MEMPART_ASSOCIATE(prp, mpart_list->i[i].id, mpart_list->i[i].flags)) != EOK)
{
(void)MEMPART_DISASSOCIATE(prp, part_id_t_INVALID);
(void)MUTEX_DESTROY(prp, &prp->mpartlist_lock);
(void)MUTEX_DESTROY(prp, &prp->spartlist_lock);
object_free(NULL, &process_souls, prp);
kererr(act, status);
return;
}
}
if (SCHEDPART_INSTALLED())
{
for (i=0; i<spart_list->num_entries; i++)
{
if ((status = SCHEDPART_ASSOCIATE(prp, spart_list->i[i].id, spart_list->i[i].flags)) != EOK)
{
(void)MEMPART_DISASSOCIATE(prp, part_id_t_INVALID);
(void)MUTEX_DESTROY(prp, &prp->mpartlist_lock);
(void)MUTEX_DESTROY(prp, &prp->spartlist_lock);
object_free(NULL, &process_souls, prp);
kererr(act, status);
return;
}
}
}
}
// Allocate a vector for 1 thread but don't get a thread entry.
if(vector_add(&prp->threads, NULL, 1) == -1) {
(void)SCHEDPART_DISASSOCIATE(prp, part_id_t_INVALID);
(void)MEMPART_DISASSOCIATE(prp, part_id_t_INVALID);
(void)MUTEX_DESTROY(prp, &prp->mpartlist_lock);
(void)MUTEX_DESTROY(prp, &prp->spartlist_lock);
object_free(NULL, &process_souls, prp);
kererr(act, ENOMEM);
return;
}
// Add process to the process table vector.
if((pid = vector_add(&process_vector, prp, 0)) == -1) {
(void)SCHEDPART_DISASSOCIATE(prp, part_id_t_INVALID);
(void)MEMPART_DISASSOCIATE(prp, part_id_t_INVALID);
(void)MUTEX_DESTROY(prp, &prp->mpartlist_lock);
(void)MUTEX_DESTROY(prp, &prp->spartlist_lock);
vector_free(&prp->threads);
object_free(NULL, &process_souls, prp);
kererr(act, ENOMEM);
return;
}
prp->boundry_addr = VM_KERN_SPACE_BOUNDRY;
prp->pid = pid | pid_unique; // adjust pid_unique during process destroy
SIGMASK_SPECIAL(&prp->sig_queue);
// Call out to allow memory manager to initialize the address space
if((status = memmgr.mcreate(prp)) != EOK) {
(void)SCHEDPART_DISASSOCIATE(prp, part_id_t_INVALID);
(void)MEMPART_DISASSOCIATE(prp, part_id_t_INVALID);
(void)MUTEX_DESTROY(prp, &prp->mpartlist_lock);
(void)MUTEX_DESTROY(prp, &prp->spartlist_lock);
vector_rem(&process_vector, PINDEX(pid));
vector_free(&prp->threads);
object_free(NULL, &process_souls, prp);
kererr(act, status);
return;
}
// Inherit parents information
info = parent->cred->info;
info.sgid = parent->cred->info.egid;
info.suid = 0; // The loader will set to euid after loading...
cred_set(&prp->cred, &info);
prp->seq = 1;
// inherit setrlimit/getrlimit settings
for(i=0; i < RLIM_NLIMITS; i++) {
prp->rlimit_vals_soft[i] = parent->rlimit_vals_soft[i];
prp->rlimit_vals_hard[i] = parent->rlimit_vals_hard[i];
}
prp->max_cpu_time = parent->max_cpu_time;
// stop core file generation if RLIMIT_CORE is 0
if (prp->rlimit_vals_soft[RLIMIT_CORE] == 0) {
prp->flags |= _NTO_PF_NOCOREDUMP;
}
// Inherit default scheduling partition
// from creating thread.
prp->default_dpp = SELECT_DPP(act, prp, schedpart_getid(prp));
prp->pgrp = parent->pgrp;
prp->umask = parent->umask;
prp->sig_ignore = parent->sig_ignore;
SIGMASK_NO_KILLSTOP(&prp->sig_ignore);
if((prp->limits = lookup_limits(parent->cred->info.euid)) ||
(prp->limits = parent->limits)) {
prp->limits->links++;
}
if((prp->session = parent->session)) {
atomic_add(&prp->session->links, 1);
}
// Link the new process in as a child of its creator.
prp->child = NULL;
prp->parent = parent;
prp->sibling = parent->child;
parent->child = prp;
++parent->num_processes;
_TRACE_PR_EMIT_CREATE(prp);
SETKSTATUS(act, prp);
}
