static int
mic_fasync(int fd, struct file *filp, int on)
{
int rc=0;
if ((rc = fasync_helper(fd, filp, on, &mic_data.dd_fasync)) < 0) {
return rc;
}
if (on) {
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 18, 0))
rc = __f_setown(filp, task_pid(current), PIDTYPE_PID, 0);
#else
__f_setown(filp, task_pid(current), PIDTYPE_PID, 0);
#endif
filp->private_data = filp;
} else {
filp->private_data = NULL;
}
return rc;
}
int is_container_init(struct task_struct *tsk)
{
int ret = 0;
struct pid *pid;
rcu_read_lock();
pid = task_pid(tsk);
if (pid != NULL && pid->numbers[pid->level].nr == 1)
ret = 1;
rcu_read_unlock();
return ret;
}
static int __init kernel_init(void * unused)
{
lock_kernel();
/*
* 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();
/*
* 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;
}
/*
* We fill out the fields in the waiter to store the information about
* the deadlock. We print when we return. act_waiter can be NULL in
* case of a remove waiter operation.
*/
void debug_rt_mutex_deadlock(int detect, struct rt_mutex_waiter *act_waiter,
struct rt_mutex *lock)
{
struct task_struct *task;
if (!debug_locks || detect || !act_waiter)
return;
task = rt_mutex_owner(act_waiter->lock);
if (task && task != current) {
act_waiter->deadlock_task_pid = get_pid(task_pid(task));
act_waiter->deadlock_lock = lock;
}
}
void
kperf_on_cpu_internal(thread_t thread, thread_continue_t continuation,
uintptr_t *starting_fp)
{
if (kperf_kdebug_cswitch) {
/* trace the new thread's PID for Instruments */
int pid = task_pid(get_threadtask(thread));
BUF_DATA(PERF_TI_CSWITCH, thread_tid(thread), pid);
}
if (kperf_lightweight_pet_active) {
kperf_pet_on_cpu(thread, continuation, starting_fp);
}
}
/*
* We fill out the fields in the waiter to store the information about
* the deadlock. We print when we return. act_waiter can be NULL in
* case of a remove waiter operation.
*/
void debug_rt_mutex_deadlock(enum rtmutex_chainwalk chwalk,
struct rt_mutex_waiter *act_waiter,
struct rt_mutex *lock)
{
struct task_struct *task;
if (!debug_locks || chwalk == RT_MUTEX_FULL_CHAINWALK || !act_waiter)
return;
task = rt_mutex_owner(act_waiter->lock);
if (task && task != current) {
act_waiter->deadlock_task_pid = get_pid(task_pid(task));
act_waiter->deadlock_lock = lock;
}
}
static ssize_t
backfire_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
{
int signo;
struct pid *pid;
if (sscanf(buf, "%d", &signo) >= 1) {
if (signo > 0 && signo < 32) {
pid = get_pid(task_pid(current));
do_gettimeofday(&sendtime);
kill_pid(pid, signo, 1);
} else
printk(KERN_ERR "Invalid signal no. %d\n", signo);
}
return strlen(buf);
}
static struct pid *good_sigevent(sigevent_t * event)
{
struct task_struct *rtn = current->group_leader;
if ((event->sigev_notify & SIGEV_THREAD_ID ) &&
(!(rtn = find_task_by_vpid(event->sigev_notify_thread_id)) ||
!same_thread_group(rtn, current) ||
(event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_SIGNAL))
return NULL;
if (((event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE) &&
((event->sigev_signo <= 0) || (event->sigev_signo > SIGRTMAX)))
return NULL;
return task_pid(rtn);
}
void
kperf_ipi_handler(void *param)
{
struct kperf_context ctx;
struct kperf_timer *timer = param;
assert(timer != NULL);
/* Always cut a tracepoint to show a sample event occurred */
BUF_DATA(PERF_TM_HNDLR | DBG_FUNC_START, 0);
int ncpu = cpu_number();
struct kperf_sample *intbuf = kperf_intr_sample_buffer();
/* On a timer, we can see the "real" current thread */
ctx.cur_thread = current_thread();
ctx.cur_pid = task_pid(get_threadtask(ctx.cur_thread));
/* who fired */
ctx.trigger_type = TRIGGER_TYPE_TIMER;
ctx.trigger_id = (unsigned int)(timer - kperf_timerv);
if (ctx.trigger_id == pet_timer_id && ncpu < machine_info.logical_cpu_max) {
kperf_thread_on_cpus[ncpu] = ctx.cur_thread;
}
/* make sure sampling is on */
unsigned int status = kperf_sampling_status();
if (status == KPERF_SAMPLING_OFF) {
BUF_INFO(PERF_TM_HNDLR | DBG_FUNC_END, SAMPLE_OFF);
return;
} else if (status == KPERF_SAMPLING_SHUTDOWN) {
BUF_INFO(PERF_TM_HNDLR | DBG_FUNC_END, SAMPLE_SHUTDOWN);
return;
}
/* call the action -- kernel-only from interrupt, pend user */
int r = kperf_sample(intbuf, &ctx, timer->actionid, SAMPLE_FLAG_PEND_USER);
/* end tracepoint is informational */
BUF_INFO(PERF_TM_HNDLR | DBG_FUNC_END, r);
#if defined(__x86_64__)
(void)atomic_bit_clear(&(timer->pending_cpus), ncpu, __ATOMIC_RELAXED);
#endif /* defined(__x86_64__) */
}
static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
unsigned char __user * buf, size_t nr)
{
struct r3964_info *pInfo = (struct r3964_info *)tty->disc_data;
struct r3964_client_info *pClient;
struct r3964_message *pMsg;
struct r3964_client_message theMsg;
int count;
TRACE_L("read()");
pClient = findClient(pInfo, task_pid(current));
if (pClient) {
pMsg = remove_msg(pInfo, pClient);
if (pMsg == NULL) {
/* no messages available. */
if (file->f_flags & O_NONBLOCK) {
return -EAGAIN;
}
/* block until there is a message: */
wait_event_interruptible(pInfo->read_wait,
(pMsg = remove_msg(pInfo, pClient)));
}
/* If we still haven't got a message, we must have been signalled */
if (!pMsg)
return -EINTR;
/* deliver msg to client process: */
theMsg.msg_id = pMsg->msg_id;
theMsg.arg = pMsg->arg;
theMsg.error_code = pMsg->error_code;
count = sizeof(struct r3964_client_message);
kfree(pMsg);
TRACE_M("r3964_read - msg kfree %p", pMsg);
if (copy_to_user(buf, &theMsg, count))
return -EFAULT;
TRACE_PS("read - return %d", count);
return count;
}
return -EPERM;
}
static int
mic_fasync(int fd, struct file *filp, int on)
{
int rc;
if ((rc = fasync_helper(fd, filp, on, &mic_data.dd_fasync)) < 0) {
return rc;
}
if (on) {
rc = __f_setown(filp, task_pid(current), PIDTYPE_PID, 0);
filp->private_data = filp;
} else {
filp->private_data = NULL;
}
return rc;
}
static struct pid *good_sigevent(sigevent_t * event)
{
struct task_struct *rtn = current->group_leader;
int sig = event->sigev_signo;
if ((event->sigev_notify & SIGEV_THREAD_ID ) &&
(!(rtn = find_task_by_vpid(event->sigev_notify_thread_id)) ||
!same_thread_group(rtn, current) ||
(event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_SIGNAL))
return NULL;
if (((event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE) &&
(sig <= 0 || sig > SIGRTMAX || sig_kernel_only(sig) ||
sig_kernel_coredump(sig)))
return NULL;
return task_pid(rtn);
}
static int ulo_ctl_queue(struct ulo_dev *dev, int qindex,
union ulo_ctl __user *uarg)
{
struct ulo_qelem *qelem;
/* this element will be freed by ulo_xfer_{start,end}() */
qelem = kmem_cache_alloc(ulo_cache, GFP_KERNEL);
if (IS_ERR(qelem))
return PTR_ERR(qelem);
if (unlikely(copy_from_user(&qelem->ctl, uarg, sizeof(*uarg)))) {
kmem_cache_free(ulo_cache, qelem);
return -EFAULT;
}
if (qindex == UloQ_READY)
qelem->ctl.ready.pid = task_pid(current);
ulo_append(dev, qindex, qelem);
return 0;
}
static void __exit ModExit(void)
{
if(thread_id){
kill_pid(task_pid(thread_id), SIGTERM, 1);
}
wait_for_completion(&on_exit);
device_destroy(template_class, device_number);
class_destroy(template_class);
printk("trying to unregister 0x%x\n", device_number);
cdev_del( driver_object );
unregister_chrdev_region( device_number, 1 );
printk("exiting\n");
}
static struct proc *
mac_task_get_proc(struct task *task)
{
if (task == current_task())
return proc_self();
/*
* Tasks don't really hold a reference on a proc unless the
* calling thread belongs to the task in question.
*/
int pid = task_pid(task);
struct proc *p = proc_find(pid);
if (p != NULL) {
if (proc_task(p) == task)
return p;
proc_rele(p);
}
return NULL;
}
int
kperf_port_to_pid(mach_port_name_t portname)
{
task_t task;
int pid;
if (!MACH_PORT_VALID(portname)) {
return -1;
}
task = port_name_to_task(portname);
if (task == TASK_NULL) {
return -1;
}
pid = task_pid(task);
task_deallocate_internal(task);
return pid;
}
void register_alloc_info(int index,u64 uiAllocedMemMap )
{
unsigned int id = g3d_bootm[index].file_desc_id;
alloc_info *s_info = alloc_info_head;
// printk("<register_alloc_info index=%d id=0x%x AllocedMemMap=0x%x>\n",index,id,uiAllocedMemMap);
while(s_info!=NULL)
{
if(s_info->file_desc_id == id) break;
s_info = s_info->next;
}
if(s_info)
{
if(s_info->uiAllocedMemMap & uiAllocedMemMap)
printk("err uiAllocedMemMap\n");
else s_info->uiAllocedMemMap|=uiAllocedMemMap;
}
else
{
s_info = vmalloc(sizeof(alloc_info));
s_info->file_desc_id = id;
s_info->pId = task_pid(current);
s_info->next = NULL;
s_info->uiAllocedMemMap = uiAllocedMemMap;
if(alloc_info_tail)
alloc_info_tail->next = s_info;
else
alloc_info_head = s_info;
alloc_info_tail = s_info;
}
#ifdef DEBUG_S3C_G3D
g3d_alloc_info_dump();
#endif
}
/* Called without the kernel lock held - fine */
static unsigned int r3964_poll(struct tty_struct *tty, struct file *file,
struct poll_table_struct *wait)
{
struct r3964_info *pInfo = (struct r3964_info *)tty->disc_data;
struct r3964_client_info *pClient;
struct r3964_message *pMsg = NULL;
unsigned long flags;
int result = POLLOUT;
TRACE_L("POLL");
pClient = findClient(pInfo, task_pid(current));
if (pClient) {
poll_wait(file, &pInfo->read_wait, wait);
spin_lock_irqsave(&pInfo->lock, flags);
pMsg = pClient->first_msg;
spin_unlock_irqrestore(&pInfo->lock, flags);
if (pMsg)
result |= POLLIN | POLLRDNORM;
} else {
result = -EINVAL;
}
return result;
}
static ssize_t r3964_write(struct tty_struct *tty, struct file *file,
const unsigned char *data, size_t count)
{
struct r3964_info *pInfo = (struct r3964_info *)tty->disc_data;
struct r3964_block_header *pHeader;
struct r3964_client_info *pClient;
unsigned char *new_data;
TRACE_L("write request, %d characters", count);
/*
* Verify the pointers
*/
if (!pInfo)
return -EIO;
/*
* Ensure that the caller does not wish to send too much.
*/
if (count > R3964_MTU) {
if (pInfo->flags & R3964_DEBUG) {
TRACE_L(KERN_WARNING "r3964_write: truncating user "
"packet from %u to mtu %d", count, R3964_MTU);
}
count = R3964_MTU;
}
/*
* Allocate a buffer for the data and copy it from the buffer with header prepended
*/
new_data = kmalloc(count + sizeof(struct r3964_block_header),
GFP_KERNEL);
TRACE_M("r3964_write - kmalloc %p", new_data);
if (new_data == NULL) {
if (pInfo->flags & R3964_DEBUG) {
printk(KERN_ERR "r3964_write: no memory\n");
}
return -ENOSPC;
}
pHeader = (struct r3964_block_header *)new_data;
pHeader->data = new_data + sizeof(struct r3964_block_header);
pHeader->length = count;
pHeader->locks = 0;
pHeader->owner = NULL;
pClient = findClient(pInfo, task_pid(current));
if (pClient) {
pHeader->owner = pClient;
}
memcpy(pHeader->data, data, count); /* We already verified this */
if (pInfo->flags & R3964_DEBUG) {
dump_block(pHeader->data, count);
}
/*
* Add buffer to transmit-queue:
*/
add_tx_queue(pInfo, pHeader);
trigger_transmit(pInfo);
return 0;
}
/*
* This needs some heavy checking ...
* I just haven't the stomach for it. I also don't fully
* understand sessions/pgrp etc. Let somebody who does explain it.
*
* OK, I think I have the protection semantics right.... this is really
* only important on a multi-user system anyway, to make sure one user
* can't send a signal to a process owned by another. -TYT, 12/12/91
*
* Auch. Had to add the 'did_exec' flag to conform completely to POSIX.
* LBT 04.03.94
*/
asmlinkage long sys_setpgid(pid_t pid, pid_t pgid)
{
struct task_struct *p;
struct task_struct *group_leader = current->group_leader;
struct pid *pgrp;
int err;
if (!pid)
pid = task_pid_vnr(group_leader);
if (!pgid)
pgid = pid;
if (pgid < 0)
return -EINVAL;
/* From this point forward we keep holding onto the tasklist lock
* so that our parent does not change from under us. -DaveM
*/
write_lock_irq(&tasklist_lock);
err = -ESRCH;
p = find_task_by_vpid(pid);
if (!p)
goto out;
err = -EINVAL;
if (!thread_group_leader(p))
goto out;
if (same_thread_group(p->real_parent, group_leader)) {
err = -EPERM;
if (task_session(p) != task_session(group_leader))
goto out;
err = -EACCES;
if (p->did_exec)
goto out;
} else {
err = -ESRCH;
if (p != group_leader)
goto out;
}
err = -EPERM;
if (p->signal->leader)
goto out;
pgrp = task_pid(p);
if (pgid != pid) {
struct task_struct *g;
pgrp = find_vpid(pgid);
g = pid_task(pgrp, PIDTYPE_PGID);
if (!g || task_session(g) != task_session(group_leader))
goto out;
}
err = security_task_setpgid(p, pgid);
if (err)
goto out;
if (task_pgrp(p) != pgrp) {
change_pid(p, PIDTYPE_PGID, pgrp);
set_task_pgrp(p, pid_nr(pgrp));
}
err = 0;
out:
/* All paths lead to here, thus we are safe. -DaveM */
write_unlock_irq(&tasklist_lock);
return err;
}
static int __init kernel_init(void * unused)
{
lock_kernel();
/*
* init can allocate pages on any node
*/
set_mems_allowed(node_possible_map);
#ifdef CONFIG_SYS_HAS_CONTROL_CPU
/*
* init can run on cpu0 only .
*/
set_cpus_allowed_ptr(current, cpumask_of(0));
#else
/*
* init can run on any cpu .
*/
set_cpus_allowed_ptr(current, cpu_all_mask);
#endif
/*
* 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();
#ifdef CONFIG_SYS_HAS_CONTROL_CPU
/* HeJianjun modified for bug 148,
* we run linux local processes on only cpu0, other cpu's are just for running dapp */
set_cpus_allowed_ptr(current, cpumask_of(0));
#endif
do_basic_setup();
/*
* 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;
}
/**
* ecryptfs_miscdev_write - handle write to daemon miscdev handle
* @file: File for misc dev handle (ignored)
* @buf: Buffer containing user data
* @count: Amount of data in @buf
* @ppos: Pointer to offset in file (ignored)
*
* miscdevfs packet format:
* Octet 0: Type
* Octets 1-4: network byte order msg_ctx->counter (0's for non-response)
* Octets 5-N0: Size of struct ecryptfs_message to follow
* Octets N0-N1: struct ecryptfs_message (including data)
*
* Returns the number of bytes read from @buf
*/
static ssize_t
ecryptfs_miscdev_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
__be32 counter_nbo;
u32 seq;
size_t packet_size, packet_size_length, i;
ssize_t sz = 0;
char *data;
uid_t euid = current_euid();
unsigned char packet_size_peek[3];
int rc;
if (count == 0) {
goto out;
} else if (count == (1 + 4)) {
/* Likely a harmless MSG_HELO or MSG_QUIT - no packet length */
goto memdup;
} else if (count < (1 + 4 + 1)
|| count > (1 + 4 + 2 + sizeof(struct ecryptfs_message) + 4
+ ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES)) {
printk(KERN_WARNING "%s: Acceptable packet size range is "
"[%d-%lu], but amount of data written is [%zu].",
__func__, (1 + 4 + 1),
(1 + 4 + 2 + sizeof(struct ecryptfs_message) + 4
+ ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES), count);
return -EINVAL;
}
if (copy_from_user(packet_size_peek, (buf + 1 + 4),
sizeof(packet_size_peek))) {
printk(KERN_WARNING "%s: Error while inspecting packet size\n",
__func__);
return -EFAULT;
}
rc = ecryptfs_parse_packet_length(packet_size_peek, &packet_size,
&packet_size_length);
if (rc) {
printk(KERN_WARNING "%s: Error parsing packet length; "
"rc = [%d]\n", __func__, rc);
return rc;
}
if ((1 + 4 + packet_size_length + packet_size) != count) {
printk(KERN_WARNING "%s: Invalid packet size [%zu]\n", __func__,
packet_size);
return -EINVAL;
}
memdup:
data = memdup_user(buf, count);
if (IS_ERR(data)) {
printk(KERN_ERR "%s: memdup_user returned error [%ld]\n",
__func__, PTR_ERR(data));
goto out;
}
sz = count;
i = 0;
switch (data[i++]) {
case ECRYPTFS_MSG_RESPONSE:
if (count < (1 + 4 + 1 + sizeof(struct ecryptfs_message))) {
printk(KERN_WARNING "%s: Minimum acceptable packet "
"size is [%zd], but amount of data written is "
"only [%zd]. Discarding response packet.\n",
__func__,
(1 + 4 + 1 + sizeof(struct ecryptfs_message)),
count);
goto out_free;
}
memcpy(&counter_nbo, &data[i], 4);
seq = be32_to_cpu(counter_nbo);
i += 4 + packet_size_length;
rc = ecryptfs_miscdev_response(&data[i], packet_size,
euid, current_user_ns(),
task_pid(current), seq);
if (rc)
printk(KERN_WARNING "%s: Failed to deliver miscdev "
"response to requesting operation; rc = [%d]\n",
__func__, rc);
break;
case ECRYPTFS_MSG_HELO:
case ECRYPTFS_MSG_QUIT:
break;
default:
ecryptfs_printk(KERN_WARNING, "Dropping miscdev "
"message of unrecognized type [%d]\n",
data[0]);
break;
}
out_free:
kfree(data);
out:
return sz;
}
/**
* ecryptfs_miscdev_read - format and send message from queue
* @file: fs/ecryptfs/euid miscdevfs handle (ignored)
* @buf: User buffer into which to copy the next message on the daemon queue
* @count: Amount of space available in @buf
* @ppos: Offset in file (ignored)
*
* Pulls the most recent message from the daemon queue, formats it for
* being sent via a miscdevfs handle, and copies it into @buf
*
* Returns the number of bytes copied into the user buffer
*/
static ssize_t
ecryptfs_miscdev_read(struct file *file, char __user *buf, size_t count,
loff_t *ppos)
{
struct ecryptfs_daemon *daemon;
struct ecryptfs_msg_ctx *msg_ctx;
size_t packet_length_size;
char packet_length[3];
size_t i;
size_t total_length;
uid_t euid = current_euid();
int rc;
mutex_lock(&ecryptfs_daemon_hash_mux);
/* TODO: Just use file->private_data? */
rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current_user_ns());
if (rc || !daemon) {
mutex_unlock(&ecryptfs_daemon_hash_mux);
return -EINVAL;
}
mutex_lock(&daemon->mux);
if (task_pid(current) != daemon->pid) {
mutex_unlock(&daemon->mux);
mutex_unlock(&ecryptfs_daemon_hash_mux);
return -EPERM;
}
if (daemon->flags & ECRYPTFS_DAEMON_ZOMBIE) {
rc = 0;
mutex_unlock(&ecryptfs_daemon_hash_mux);
printk(KERN_WARNING "%s: Attempt to read from zombified "
"daemon\n", __func__);
goto out_unlock_daemon;
}
if (daemon->flags & ECRYPTFS_DAEMON_IN_READ) {
rc = 0;
mutex_unlock(&ecryptfs_daemon_hash_mux);
goto out_unlock_daemon;
}
/* This daemon will not go away so long as this flag is set */
daemon->flags |= ECRYPTFS_DAEMON_IN_READ;
mutex_unlock(&ecryptfs_daemon_hash_mux);
check_list:
if (list_empty(&daemon->msg_ctx_out_queue)) {
mutex_unlock(&daemon->mux);
rc = wait_event_interruptible(
daemon->wait, !list_empty(&daemon->msg_ctx_out_queue));
mutex_lock(&daemon->mux);
if (rc < 0) {
rc = 0;
goto out_unlock_daemon;
}
}
if (daemon->flags & ECRYPTFS_DAEMON_ZOMBIE) {
rc = 0;
goto out_unlock_daemon;
}
if (list_empty(&daemon->msg_ctx_out_queue)) {
/* Something else jumped in since the
* wait_event_interruptable() and removed the
* message from the queue; try again */
goto check_list;
}
msg_ctx = list_first_entry(&daemon->msg_ctx_out_queue,
struct ecryptfs_msg_ctx, daemon_out_list);
BUG_ON(!msg_ctx);
mutex_lock(&msg_ctx->mux);
if (msg_ctx->msg) {
rc = ecryptfs_write_packet_length(packet_length,
msg_ctx->msg_size,
&packet_length_size);
if (rc) {
rc = 0;
printk(KERN_WARNING "%s: Error writing packet length; "
"rc = [%d]\n", __func__, rc);
goto out_unlock_msg_ctx;
}
} else {
packet_length_size = 0;
msg_ctx->msg_size = 0;
}
/* miscdevfs packet format:
* Octet 0: Type
* Octets 1-4: network byte order msg_ctx->counter
* Octets 5-N0: Size of struct ecryptfs_message to follow
* Octets N0-N1: struct ecryptfs_message (including data)
*
* Octets 5-N1 not written if the packet type does not
* include a message */
total_length = (1 + 4 + packet_length_size + msg_ctx->msg_size);
if (count < total_length) {
rc = 0;
printk(KERN_WARNING "%s: Only given user buffer of "
"size [%zd], but we need [%zd] to read the "
"pending message\n", __func__, count, total_length);
goto out_unlock_msg_ctx;
}
rc = -EFAULT;
if (put_user(msg_ctx->type, buf))
goto out_unlock_msg_ctx;
if (put_user(cpu_to_be32(msg_ctx->counter), (__be32 __user *)(buf + 1)))
goto out_unlock_msg_ctx;
i = 5;
if (msg_ctx->msg) {
if (copy_to_user(&buf[i], packet_length, packet_length_size))
goto out_unlock_msg_ctx;
i += packet_length_size;
if (copy_to_user(&buf[i], msg_ctx->msg, msg_ctx->msg_size))
goto out_unlock_msg_ctx;
i += msg_ctx->msg_size;
}
rc = i;
list_del(&msg_ctx->daemon_out_list);
kfree(msg_ctx->msg);
msg_ctx->msg = NULL;
/* We do not expect a reply from the userspace daemon for any
* message type other than ECRYPTFS_MSG_REQUEST */
if (msg_ctx->type != ECRYPTFS_MSG_REQUEST)
ecryptfs_msg_ctx_alloc_to_free(msg_ctx);
out_unlock_msg_ctx:
mutex_unlock(&msg_ctx->mux);
out_unlock_daemon:
daemon->flags &= ~ECRYPTFS_DAEMON_IN_READ;
mutex_unlock(&daemon->mux);
return rc;
}
static int __init kernel_init(void * unused)
{
lock_kernel();
/*
* init can allocate pages on any node
*/
set_mems_allowed(node_possible_map);
/*
* 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();
/*
* 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();
}
#ifdef CONFIG_PREEMPT_RT
WARN_ON(irqs_disabled());
#endif
#define DEBUG_COUNT (defined(CONFIG_DEBUG_RT_MUTEXES) + defined(CONFIG_IRQSOFF_TRACER) + defined(CONFIG_PREEMPT_TRACER) + defined(CONFIG_STACK_TRACER) + defined(CONFIG_INTERRUPT_OFF_HIST) + defined(CONFIG_PREEMPT_OFF_HIST) + defined(CONFIG_WAKEUP_LATENCY_HIST) + defined(CONFIG_DEBUG_SLAB) + defined(CONFIG_DEBUG_PAGEALLOC) + defined(CONFIG_LOCKDEP) + (defined(CONFIG_FTRACE) - defined(CONFIG_FTRACE_MCOUNT_RECORD)))
#if DEBUG_COUNT > 0
printk(KERN_ERR "*****************************************************************************\n");
printk(KERN_ERR "* *\n");
#if DEBUG_COUNT == 1
printk(KERN_ERR "* REMINDER, the following debugging option is turned on in your .config: *\n");
#else
printk(KERN_ERR "* REMINDER, the following debugging options are turned on in your .config: *\n");
#endif
printk(KERN_ERR "* *\n");
#ifdef CONFIG_DEBUG_RT_MUTEXES
printk(KERN_ERR "* CONFIG_DEBUG_RT_MUTEXES *\n");
#endif
#ifdef CONFIG_IRQSOFF_TRACER
printk(KERN_ERR "* CONFIG_IRQSOFF_TRACER *\n");
#endif
#ifdef CONFIG_PREEMPT_TRACER
printk(KERN_ERR "* CONFIG_PREEMPT_TRACER *\n");
#endif
#if defined(CONFIG_FTRACE) && !defined(CONFIG_FTRACE_MCOUNT_RECORD)
printk(KERN_ERR "* CONFIG_FTRACE *\n");
#endif
#ifdef CONFIG_INTERRUPT_OFF_HIST
printk(KERN_ERR "* CONFIG_INTERRUPT_OFF_HIST *\n");
#endif
#ifdef CONFIG_PREEMPT_OFF_HIST
printk(KERN_ERR "* CONFIG_PREEMPT_OFF_HIST *\n");
#endif
#ifdef CONFIG_WAKEUP_LATENCY_HIST
printk(KERN_ERR "* CONFIG_WAKEUP_LATENCY_HIST *\n");
#endif
#ifdef CONFIG_DEBUG_SLAB
printk(KERN_ERR "* CONFIG_DEBUG_SLAB *\n");
#endif
#ifdef CONFIG_DEBUG_PAGEALLOC
printk(KERN_ERR "* CONFIG_DEBUG_PAGEALLOC *\n");
#endif
#ifdef CONFIG_LOCKDEP
printk(KERN_ERR "* CONFIG_LOCKDEP *\n");
#endif
printk(KERN_ERR "* *\n");
#if DEBUG_COUNT == 1
printk(KERN_ERR "* it may increase runtime overhead and latencies. *\n");
#else
printk(KERN_ERR "* they may increase runtime overhead and latencies. *\n");
#endif
printk(KERN_ERR "* *\n");
printk(KERN_ERR "*****************************************************************************\n");
#endif
/*
* 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;
}
static int init(void * unused)
{
lock_kernel();
/*
* init can run on any cpu.
*/
set_cpus_allowed(current, CPU_MASK_ALL);
/*
* 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.
*/
child_reaper = current;
cad_pid = task_pid(current);
smp_prepare_cpus(max_cpus);
do_pre_smp_initcalls();
smp_init();
sched_init_smp();
cpuset_init_smp();
/*
* Do this before initcalls, because some drivers want to access
* firmware files.
*/
populate_rootfs();
do_basic_setup();
/*
* 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..
*/
free_initmem();
unlock_kernel();
mark_rodata_ro();
system_state = SYSTEM_RUNNING;
numa_default_policy();
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);
if (ramdisk_execute_command) {
run_init_process(ramdisk_execute_command);
printk(KERN_WARNING "Failed to execute %s\n",
ramdisk_execute_command);
}
/*
* We try each of these until one succeeds.
*
* The Bourne shell can be used instead of init if we are
* trying to recover a really broken machine.
*/
if (execute_command) {
run_init_process(execute_command);
printk(KERN_WARNING "Failed to execute %s. Attempting "
"defaults...\n", execute_command);
}
run_init_process("/sbin/init");
run_init_process("/etc/init");
run_init_process("/bin/init");
run_init_process("/bin/sh");
panic("No init found. Try passing init= option to kernel.");
}
/**
* ecryptfs_miscdev_write - handle write to daemon miscdev handle
* @file: File for misc dev handle (ignored)
* @buf: Buffer containing user data
* @count: Amount of data in @buf
* @ppos: Pointer to offset in file (ignored)
*
* miscdevfs packet format:
* Octet 0: Type
* Octets 1-4: network byte order msg_ctx->counter (0's for non-response)
* Octets 5-N0: Size of struct ecryptfs_message to follow
* Octets N0-N1: struct ecryptfs_message (including data)
*
* Returns the number of bytes read from @buf
*/
static ssize_t
ecryptfs_miscdev_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
__be32 counter_nbo;
u32 seq;
size_t packet_size, packet_size_length, i;
ssize_t sz = 0;
char *data;
int rc;
if (count == 0)
goto out;
data = kmalloc(count, GFP_KERNEL);
if (!data) {
printk(KERN_ERR "%s: Out of memory whilst attempting to "
"kmalloc([%Zd], GFP_KERNEL)\n", __func__, count);
goto out;
}
rc = copy_from_user(data, buf, count);
if (rc) {
printk(KERN_ERR "%s: copy_from_user returned error [%d]\n",
__func__, rc);
goto out_free;
}
sz = count;
i = 0;
switch (data[i++]) {
case ECRYPTFS_MSG_RESPONSE:
if (count < (1 + 4 + 1 + sizeof(struct ecryptfs_message))) {
printk(KERN_WARNING "%s: Minimum acceptable packet "
"size is [%Zd], but amount of data written is "
"only [%Zd]. Discarding response packet.\n",
__func__,
(1 + 4 + 1 + sizeof(struct ecryptfs_message)),
count);
goto out_free;
}
memcpy(&counter_nbo, &data[i], 4);
seq = be32_to_cpu(counter_nbo);
i += 4;
rc = ecryptfs_parse_packet_length(&data[i], &packet_size,
&packet_size_length);
if (rc) {
printk(KERN_WARNING "%s: Error parsing packet length; "
"rc = [%d]\n", __func__, rc);
goto out_free;
}
i += packet_size_length;
if ((1 + 4 + packet_size_length + packet_size) != count) {
printk(KERN_WARNING "%s: (1 + packet_size_length([%Zd])"
" + packet_size([%Zd]))([%Zd]) != "
"count([%Zd]). Invalid packet format.\n",
__func__, packet_size_length, packet_size,
(1 + packet_size_length + packet_size), count);
goto out_free;
}
rc = ecryptfs_miscdev_response(&data[i], packet_size,
current->euid,
current->nsproxy->user_ns,
task_pid(current), seq);
if (rc)
printk(KERN_WARNING "%s: Failed to deliver miscdev "
"response to requesting operation; rc = [%d]\n",
__func__, rc);
break;
case ECRYPTFS_MSG_HELO:
rc = ecryptfs_miscdev_helo(current->euid,
current->nsproxy->user_ns,
task_pid(current));
if (rc) {
printk(KERN_ERR "%s: Error attempting to process "
"helo from pid [0x%p]; rc = [%d]\n", __func__,
task_pid(current), rc);
goto out_free;
}
break;
case ECRYPTFS_MSG_QUIT:
rc = ecryptfs_miscdev_quit(current->euid,
current->nsproxy->user_ns,
task_pid(current));
if (rc) {
printk(KERN_ERR "%s: Error attempting to process "
"quit from pid [0x%p]; rc = [%d]\n", __func__,
task_pid(current), rc);
goto out_free;
}
break;
default:
ecryptfs_printk(KERN_WARNING, "Dropping miscdev "
"message of unrecognized type [%d]\n",
data[0]);
break;
}
out_free:
kfree(data);
out:
return sz;
}
static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
unsigned char __user * buf, size_t nr)
{
struct r3964_info *pInfo = tty->disc_data;
struct r3964_client_info *pClient;
struct r3964_message *pMsg;
struct r3964_client_message theMsg;
int ret;
TRACE_L("read()");
/*
* Internal serialization of reads.
*/
if (file->f_flags & O_NONBLOCK) {
if (!mutex_trylock(&pInfo->read_lock))
return -EAGAIN;
} else {
if (mutex_lock_interruptible(&pInfo->read_lock))
return -ERESTARTSYS;
}
pClient = findClient(pInfo, task_pid(current));
if (pClient) {
pMsg = remove_msg(pInfo, pClient);
if (pMsg == NULL) {
/* no messages available. */
if (tty_io_nonblock(tty, file)) {
ret = -EAGAIN;
goto unlock;
}
/* block until there is a message: */
wait_event_interruptible(tty->read_wait,
(pMsg = remove_msg(pInfo, pClient)));
}
/* If we still haven't got a message, we must have been signalled */
if (!pMsg) {
ret = -EINTR;
goto unlock;
}
/* deliver msg to client process: */
theMsg.msg_id = pMsg->msg_id;
theMsg.arg = pMsg->arg;
theMsg.error_code = pMsg->error_code;
ret = sizeof(struct r3964_client_message);
kfree(pMsg);
TRACE_M("r3964_read - msg kfree %p", pMsg);
if (copy_to_user(buf, &theMsg, ret)) {
ret = -EFAULT;
goto unlock;
}
TRACE_PS("read - return %d", ret);
goto unlock;
}
ret = -EPERM;
unlock:
mutex_unlock(&pInfo->read_lock);
return ret;
}
/**
* ecryptfs_miscdev_write - handle write to daemon miscdev handle
* @file: File for misc dev handle (ignored)
* @buf: Buffer containing user data
* @count: Amount of data in @buf
* @ppos: Pointer to offset in file (ignored)
*
* miscdevfs packet format:
* Octet 0: Type
* Octets 1-4: network byte order msg_ctx->counter (0's for non-response)
* Octets 5-N0: Size of struct ecryptfs_message to follow
* Octets N0-N1: struct ecryptfs_message (including data)
*
* Returns the number of bytes read from @buf
*/
static ssize_t
ecryptfs_miscdev_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
__be32 counter_nbo;
u32 seq;
size_t packet_size, packet_size_length, i;
ssize_t sz = 0;
char *data;
uid_t euid = current_euid();
int rc;
if (count == 0)
goto out;
data = memdup_user(buf, count);
if (IS_ERR(data)) {
printk(KERN_ERR "%s: memdup_user returned error [%ld]\n",
__func__, PTR_ERR(data));
goto out;
}
sz = count;
i = 0;
switch (data[i++]) {
case ECRYPTFS_MSG_RESPONSE:
if (count < (1 + 4 + 1 + sizeof(struct ecryptfs_message))) {
printk(KERN_WARNING "%s: Minimum acceptable packet "
"size is [%zd], but amount of data written is "
"only [%zd]. Discarding response packet.\n",
__func__,
(1 + 4 + 1 + sizeof(struct ecryptfs_message)),
count);
goto out_free;
}
memcpy(&counter_nbo, &data[i], 4);
seq = be32_to_cpu(counter_nbo);
i += 4;
rc = ecryptfs_parse_packet_length(&data[i], &packet_size,
&packet_size_length);
if (rc) {
printk(KERN_WARNING "%s: Error parsing packet length; "
"rc = [%d]\n", __func__, rc);
goto out_free;
}
i += packet_size_length;
if ((1 + 4 + packet_size_length + packet_size) != count) {
printk(KERN_WARNING "%s: (1 + packet_size_length([%zd])"
" + packet_size([%zd]))([%zd]) != "
"count([%zd]). Invalid packet format.\n",
__func__, packet_size_length, packet_size,
(1 + packet_size_length + packet_size), count);
goto out_free;
}
rc = ecryptfs_miscdev_response(&data[i], packet_size,
euid, current_user_ns(),
task_pid(current), seq);
if (rc)
printk(KERN_WARNING "%s: Failed to deliver miscdev "
"response to requesting operation; rc = [%d]\n",
__func__, rc);
break;
case ECRYPTFS_MSG_CLEARMASTER_BLACK:
printk(KERN_DEBUG "Clear the master key with blacklist");
break;
case ECRYPTFS_MSG_HELO:
case ECRYPTFS_MSG_QUIT:
break;
default:
ecryptfs_printk(KERN_WARNING, "Dropping miscdev "
"message of unrecognized type [%d]\n",
data[0]);
break;
}
out_free:
kfree(data);
out:
return sz;
}
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;
}
int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
{
struct dnotify_struct *dn;
struct dnotify_struct *odn;
struct dnotify_struct **prev;
struct inode *inode;
fl_owner_t id = current->files;
struct file *f;
int error = 0;
if ((arg & ~DN_MULTISHOT) == 0) {
dnotify_flush(filp, id);
return 0;
}
if (!dir_notify_enable)
return -EINVAL;
inode = filp->f_path.dentry->d_inode;
if (!S_ISDIR(inode->i_mode))
return -ENOTDIR;
dn = kmem_cache_alloc(dn_cache, GFP_KERNEL);
if (dn == NULL)
return -ENOMEM;
spin_lock(&inode->i_lock);
prev = &inode->i_dnotify;
while ((odn = *prev) != NULL) {
if ((odn->dn_owner == id) && (odn->dn_filp == filp)) {
odn->dn_fd = fd;
odn->dn_mask |= arg;
inode->i_dnotify_mask |= arg & ~DN_MULTISHOT;
goto out_free;
}
prev = &odn->dn_next;
}
rcu_read_lock();
f = fcheck(fd);
rcu_read_unlock();
/* we'd lost the race with close(), sod off silently */
/* note that inode->i_lock prevents reordering problems
* between accesses to descriptor table and ->i_dnotify */
if (f != filp)
goto out_free;
error = __f_setown(filp, task_pid(current), PIDTYPE_PID, 0);
if (error)
goto out_free;
dn->dn_mask = arg;
dn->dn_fd = fd;
dn->dn_filp = filp;
dn->dn_owner = id;
inode->i_dnotify_mask |= arg & ~DN_MULTISHOT;
dn->dn_next = inode->i_dnotify;
inode->i_dnotify = dn;
spin_unlock(&inode->i_lock);
return 0;
out_free:
spin_unlock(&inode->i_lock);
kmem_cache_free(dn_cache, dn);
return error;
}