/**
* call_usermodehelper_keys - start a usermode application
* @path: pathname for the application
* @argv: null-terminated argument list
* @envp: null-terminated environment list
* @session_keyring: session keyring for process (NULL for an empty keyring)
* @wait: wait for the application to finish and return status.
*
* Runs a user-space application. The application is started
* asynchronously if wait is not set, and runs as a child of keventd.
* (ie. it runs with full root capabilities).
*
* Must be called from process context. Returns a negative error code
* if program was not execed successfully, or 0.
*/
int call_usermodehelper_keys(char *path, char **argv, char **envp,
struct key *session_keyring, int wait)
{
DECLARE_COMPLETION(done);
struct subprocess_info sub_info = {
.complete = &done,
.path = path,
.argv = argv,
.envp = envp,
.ring = session_keyring,
.wait = wait,
.retval = 0,
};
DECLARE_WORK(work, __call_usermodehelper, &sub_info);
OSA_REGISTER_SPINLOCK(&done.wait.lock, "wait_queue_head_t->lock", 23);
if (!khelper_wq)
return -EBUSY;
if (path[0] == '\0')
return 0;
queue_work(khelper_wq, &work);
wait_for_completion(&done);
return sub_info.retval;
}
EXPORT_SYMBOL(call_usermodehelper_keys);
void __init usermodehelper_init(void)
{
khelper_wq = create_singlethread_workqueue("khelper");
BUG_ON(!khelper_wq);
}
static int blk_do_rq(request_queue_t *q, struct block_device *bdev,
struct request *rq)
{
char sense[SCSI_SENSE_BUFFERSIZE];
DECLARE_COMPLETION(wait);
int err = 0;
rq->rq_disk = bdev->bd_disk;
/*
* we need an extra reference to the request, so we can look at
* it after io completion
*/
rq->ref_count++;
if (!rq->sense) {
memset(sense, 0, sizeof(sense));
rq->sense = sense;
rq->sense_len = 0;
}
rq->flags |= REQ_NOMERGE;
rq->waiting = &wait;
elv_add_request(q, rq, ELEVATOR_INSERT_BACK, 1);
generic_unplug_device(q);
wait_for_completion(&wait);
if (rq->errors)
err = -EIO;
return err;
}
int start_sync_thread(int state, char *mcast_ifn)
{
DECLARE_COMPLETION(startup);
pid_t pid;
if (sync_pid)
return -EEXIST;
IP_VS_DBG(7, "%s: pid %d\n", __FUNCTION__, current->pid);
IP_VS_DBG(7, "Each ip_vs_sync_conn entry need %d bytes\n",
sizeof(struct ip_vs_sync_conn));
ip_vs_sync_state = state;
strcpy(ip_vs_mcast_ifn, mcast_ifn);
repeat:
if ((pid = kernel_thread(fork_sync_thread, &startup, 0)) < 0) {
IP_VS_ERR("could not create fork_sync_thread due to %d... "
"retrying.\n", pid);
current->state = TASK_UNINTERRUPTIBLE;
schedule_timeout(HZ);
goto repeat;
}
wait_for_completion(&startup);
return 0;
}
static int send_request(request_queue_t * q, struct bio *bio,
struct block_device *bdev, struct tbio_interface *inter,
int writing)
{
struct request *rq;
void *buffer = NULL;
unsigned long start_time;
int err;
rq = blk_get_request(q, writing ? WRITE : READ, __GFP_WAIT);
rq->cmd_len = inter->cmd_len;
//printk("inter.cmd %s\n" , inter->cmd);
if (copy_from_user(rq->cmd, inter->cmd, inter->cmd_len))
goto out_request;
//printk("tbio: rq->cmd : %s\n",rq->cmd);
if (sizeof(rq->cmd) != inter->cmd_len)
memset(rq->cmd + inter->cmd_len, 0,
sizeof(rq->cmd) - inter->cmd_len);
rq->bio = rq->biotail = NULL;
blk_rq_bio_prep(q, rq, bio);
rq->data = buffer;
rq->data_len = inter->data_len;
rq->timeout = 0;
if (!rq->timeout)
rq->timeout = q->sg_timeout;
if (!rq->timeout)
rq->timeout = BLK_DEFAULT_TIMEOUT;
start_time = jiffies;
DECLARE_COMPLETION(wait);
rq->rq_disk = bdev->bd_disk;
rq->waiting = &wait;
elv_add_request(q, rq, 1, 1);
generic_unplug_device(q);
wait_for_completion(&wait);
//printk("tbio: completion\n");
if (rq->errors) {
err = -EIO;
printk("tbio: rq->errors\n");
return err;
}
blk_put_request(rq);
return 0;
out_request:
blk_put_request(rq);
return -EFAULT;
}
int mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
{
DECLARE_COMPLETION(complete);
mrq->done_data = &complete;
mrq->done = mmc_wait_done;
mmc_start_request(host, mrq);
wait_for_completion(&complete);
return 0;
}
static int erase_write (struct mtd_info *mtd, unsigned long pos,
int len, const char *buf)
{
struct erase_info erase = {};
DECLARE_COMPLETION(erase_completion);
size_t retlen;
int ret;
/*
* First, let's erase the flash block.
*/
erase.mtd = mtd;
erase.priv = (u_long)&erase_completion;
erase.callback = erase_callback;
erase.addr = pos;
erase.len = len;
ret = mtd->erase(mtd, &erase);
if (ret) {
printk (KERN_WARNING "mtdblock: erase of region [0x%lx, 0x%x] "
"on \"%s\" failed\n",
pos, len, mtd->name);
return ret;
}
wait_for_completion_interruptible(&erase_completion);
/*
* Next, writhe data to flash.
*/
ret = mtd->write(mtd, pos, len, &retlen, buf);
if (ret)
return ret;
if (retlen != len)
return -EIO;
return 0;
}
/**
* call_usermodehelper - start a usermode application
* @path: pathname for the application
* @argv: null-terminated argument list
* @envp: null-terminated environment list
*
* Runs a user-space application. The application is started asynchronously. It
* runs as a child of keventd. It runs with full root capabilities. keventd silently
* reaps the child when it exits.
*
* Must be called from process context. Returns zero on success, else a negative
* error code.
*/
int call_usermodehelper(char *path, char **argv, char **envp)
{
DECLARE_COMPLETION(work);
struct subprocess_info sub_info =
{
complete:
&work,
path:
path,
argv:
argv,
envp:
envp,
retval: 0,
};
struct tq_struct tqs =
{
routine:
__call_usermodehelper,
data:
&sub_info,
};
/*
* This should be a separate module.
*/
int usb_hub_init(void)
{
DECLARE_COMPLETION(startup);
if (usb_register(&hub_driver) < 0) {
err("Unable to register USB hub driver");
return -1;
}
if (kernel_thread(usb_hub_thread, &startup,
CLONE_FS | CLONE_FILES | CLONE_SIGHAND) >= 0) {
wait_for_completion(&startup);
return 0;
}
/* Fall through if kernel_thread failed */
usb_deregister(&hub_driver);
err("failed to start usb_hub_thread");
return -1;
}
int
xixcore_call
xixcore_HaveLotLock(
uint8 * HostMac,
uint8 * LockOwnerMac,
uint64 LotNumber,
uint8 * VolumeId,
uint8 * LockOwnerId
)
{
// Request LotLock state to Lock Owner
int RC = 0;
PXIXFSDG_PKT pPacket = NULL;
PXIXFS_LOCK_REQUEST pPacketData = NULL;
int waitStatus = LOCK_INVALID;
DECLARE_COMPLETION(wait);
DebugTrace(DEBUG_LEVEL_TRACE, (DEBUG_TARGET_RESOURCE| DEBUG_TARGET_FCB|DEBUG_TARGET_LOCK),
("Enter xixfs_AreYouHaveLotLock \n"));
RC = xixfs_AllocDGPkt(
&pPacket,
HostMac,
LockOwnerMac,
XIXFS_TYPE_LOCK_REQUEST
) ;
if(RC < 0 )
{
DebugTrace(DEBUG_LEVEL_ERROR, DEBUG_TARGET_ALL,
("Error (0x%x) xixfs_AreYouHaveLotLock:xixfs_AllocDGPkt \n",
RC));
return RC;
}
// Changed by ILGU HONG
// chesung suggest
DebugTrace(DEBUG_LEVEL_INFO, (DEBUG_TARGET_RESOURCE| DEBUG_TARGET_FCB|DEBUG_TARGET_LOCK),
("Packet Dest Info [0x%02x:%02x:%02x:%02x:%02x:%02x]\n",
LockOwnerMac[26], LockOwnerMac[27], LockOwnerMac[28],
LockOwnerMac[29], LockOwnerMac[30], LockOwnerMac[31]));
pPacketData = &(pPacket->RawDataDG.LockReq);
memcpy(pPacketData->LotOwnerID, LockOwnerId, 6);
// Changed by ILGU HONG
// chesung suggest
memcpy(pPacketData->VolumeId, VolumeId, 16);
memcpy(pPacketData->LotOwnerMac, LockOwnerMac, 32);
pPacketData->LotNumber = XI_HTONLL(LotNumber);
pPacketData->PacketNumber = XI_HTONL(atomic_read(&(xixfs_linux_global.EventCtx.PacketNumber)));
atomic_inc(&(xixfs_linux_global.EventCtx.PacketNumber));
pPacket->TimeOut = xixcore_GetCurrentTime64()+ DEFAULT_REQUEST_MAX_TIMEOUT;
pPacket->PkCtl.PktCompletion = &wait;
pPacket->PkCtl.status=&waitStatus;
printk(KERN_DEBUG "WAIT lock request\n");
xixfs_Pkt_add_sendqueue(
&xixfs_linux_global.EventCtx,
pPacket
);
wait_for_completion(&wait);
printk(KERN_DEBUG "END WAIT lock request\n");
if(waitStatus == LOCK_OWNED_BY_OWNER){
DebugTrace(DEBUG_LEVEL_CRITICAL, (DEBUG_TARGET_RESOURCE| DEBUG_TARGET_FCB|DEBUG_TARGET_LOCK),
("Exit xixfs_AreYouHaveLotLock Lock is realy acquired by other \n"));
return 1;
}else{
DebugTrace(DEBUG_LEVEL_CRITICAL, (DEBUG_TARGET_RESOURCE| DEBUG_TARGET_FCB|DEBUG_TARGET_LOCK),
("Exit XifsdAreYouHaveLotLock Lock is status(0x%x) \n", waitStatus));
return 0;
}
}
/*
* This is the task which runs the usermode application
*/
static int ____call_usermodehelper(void *data)
{
struct subprocess_info *sub_info = data;
int retval;
/* Install input pipe when needed */
if (sub_info->stdin) {
struct files_struct *f = current->files;
struct fdtable *fdt;
/* no races because files should be private here */
sys_close(0);
fd_install(0, sub_info->stdin);
spin_lock(&f->file_lock);
fdt = files_fdtable(f);
FD_SET(0, fdt->open_fds);
FD_CLR(0, fdt->close_on_exec);
spin_unlock(&f->file_lock);
/* and disallow core files too */
current->signal->rlim[RLIMIT_CORE] = (struct rlimit){0, 0};
}
/* We can run anywhere, unlike our parent keventd(). */
set_cpus_allowed(current, CPU_MASK_ALL);
retval = __exec_usermodehelper(sub_info->path,
sub_info->argv, sub_info->envp, sub_info->ring);
/* Exec failed? */
sub_info->retval = retval;
do_exit(0);
}
/* Keventd can't block, but this (a child) can. */
static int wait_for_helper(void *data)
{
struct subprocess_info *sub_info = data;
pid_t pid;
struct k_sigaction sa;
/* Install a handler: if SIGCLD isn't handled sys_wait4 won't
* populate the status, but will return -ECHILD. */
sa.sa.sa_handler = SIG_IGN;
sa.sa.sa_flags = 0;
siginitset(&sa.sa.sa_mask, sigmask(SIGCHLD));
do_sigaction(SIGCHLD, &sa, NULL);
allow_signal(SIGCHLD);
pid = kernel_thread(____call_usermodehelper, sub_info, SIGCHLD);
if (pid < 0) {
sub_info->retval = pid;
} else {
/*
* Normally it is bogus to call wait4() from in-kernel because
* wait4() wants to write the exit code to a userspace address.
* But wait_for_helper() always runs as keventd, and put_user()
* to a kernel address works OK for kernel threads, due to their
* having an mm_segment_t which spans the entire address space.
*
* Thus the __user pointer cast is valid here.
*/
sys_wait4(pid, (int __user *) &sub_info->retval, 0, NULL);
}
complete(sub_info->complete);
return 0;
}
/* This is run by khelper thread */
static void __call_usermodehelper(void *data)
{
struct subprocess_info *sub_info = data;
pid_t pid;
int wait = sub_info->wait;
/* CLONE_VFORK: wait until the usermode helper has execve'd
* successfully We need the data structures to stay around
* until that is done. */
if (wait)
pid = kernel_thread(wait_for_helper, sub_info,
CLONE_FS | CLONE_FILES | SIGCHLD);
else
pid = kernel_thread(____call_usermodehelper, sub_info,
CLONE_VFORK | SIGCHLD);
if (pid < 0) {
sub_info->retval = pid;
complete(sub_info->complete);
} else if (!wait)
complete(sub_info->complete);
}
/**
* call_usermodehelper_keys - start a usermode application
* @path: pathname for the application
* @argv: null-terminated argument list
* @envp: null-terminated environment list
* @session_keyring: session keyring for process (NULL for an empty keyring)
* @wait: wait for the application to finish and return status.
*
* Runs a user-space application. The application is started
* asynchronously if wait is not set, and runs as a child of keventd.
* (ie. it runs with full root capabilities).
*
* Must be called from process context. Returns a negative error code
* if program was not execed successfully, or 0.
*/
int call_usermodehelper_keys(char *path, char **argv, char **envp,
struct key *session_keyring, int wait)
{
DECLARE_COMPLETION_ONSTACK(done);
struct subprocess_info sub_info = {
.complete = &done,
.path = path,
.argv = argv,
.envp = envp,
.ring = session_keyring,
.wait = wait,
.retval = 0,
};
DECLARE_WORK(work, __call_usermodehelper, &sub_info);
if (!khelper_wq)
return -EBUSY;
if (path[0] == '\0')
return 0;
queue_work(khelper_wq, &work);
wait_for_completion(&done);
return sub_info.retval;
}
EXPORT_SYMBOL(call_usermodehelper_keys);
int call_usermodehelper_pipe(char *path, char **argv, char **envp,
struct file **filp)
{
DECLARE_COMPLETION(done);
struct subprocess_info sub_info = {
.complete = &done,
.path = path,
.argv = argv,
.envp = envp,
.retval = 0,
};
struct file *f;
DECLARE_WORK(work, __call_usermodehelper, &sub_info);
if (!khelper_wq)
return -EBUSY;
if (path[0] == '\0')
return 0;
f = create_write_pipe();
if (!f)
return -ENOMEM;
*filp = f;
f = create_read_pipe(f);
if (!f) {
free_write_pipe(*filp);
return -ENOMEM;
}
sub_info.stdin = f;
queue_work(khelper_wq, &work);
wait_for_completion(&done);
return sub_info.retval;
}
EXPORT_SYMBOL(call_usermodehelper_pipe);
void __init usermodehelper_init(void)
{
khelper_wq = create_singlethread_workqueue("khelper");
BUG_ON(!khelper_wq);
}
