C++ proc_create函数代码示例

co_rc_t co_os_manager_init(co_manager_t *manager, co_osdep_manager_t *osdep)
{
	co_rc_t rc = CO_RC(OK);
	co_osdep_manager_t dep;

	*osdep = dep = co_os_malloc(sizeof(*dep));
	if (dep == NULL)
		return CO_RC(OUT_OF_MEMORY);

	memset(dep, 0, sizeof(*dep));

	dep->proc_root = proc_mkdir("colinux", CO_PROC_ROOT_PTR);
	if (dep->proc_root == NULL) {
		rc = CO_RC(ERROR);
		goto error;
	}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30)
	dep->proc_root->owner = THIS_MODULE;
#endif
	dep->proc_ioctl = proc_create("ioctl",  S_IFREG|S_IRUSR|S_IWUSR, dep->proc_root, &manager_fileops);
	if (!dep->proc_ioctl) {
		rc = CO_RC(ERROR);
		goto error_root;
	}

	//dep->proc_ioctl->proc_fops = &manager_fileops;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30)
	dep->proc_ioctl->owner = THIS_MODULE;
#endif
	return rc;

error_root:
	remove_proc_entry("colinux", CO_PROC_ROOT_PTR);

error:
	co_os_free(dep);
	return rc;
}

/*
 * Clone the current process.
 *
 * The new thread is given a copy of the caller's file handles if RET
 * is not null. (If RET is null, what we're creating is a kernel-only
 * thread and it doesn't need an address space or file handles.)
 * However, the new thread always inherits its current working
 * directory from the caller. The new thread is given no address space
 * (the caller decides that).
 */
int
proc_fork(struct proc **ret)
{
	struct proc *proc;
	struct filetable *tbl;
	int result;

	proc = proc_create(curproc->p_name);
	if (proc == NULL) {
		return ENOMEM;
	}

	/* VM fields */
	/* do not clone address space -- let caller decide on that */

	/* VFS fields */
	tbl = curproc->p_filetable;
	if (tbl != NULL) {
		result = filetable_copy(tbl, &proc->p_filetable);
		if (result) {
			as_destroy(proc->p_addrspace);
			proc->p_addrspace = NULL;
			proc_destroy(proc);
			return result;
		}
	}

	spinlock_acquire(&curproc->p_lock);
	/* we don't need to lock proc->p_lock as we have the only reference */
	if (curproc->p_cwd != NULL) {
		VOP_INCREF(curproc->p_cwd);
		proc->p_cwd = curproc->p_cwd;
	}
	spinlock_release(&curproc->p_lock);

	*ret = proc;
	return 0;
}

/**
 * This function is called from kmain, however it is not running in a
 * thread context yet. It should create the idle process which will
 * start executing idleproc_run() in a real thread context.  To start
 * executing in the new process's context call context_make_active(),
 * passing in the appropriate context. This function should _NOT_
 * return.
 *
 * Note: Don't forget to set curproc and curthr appropriately.
 *
 * @param arg1 the first argument (unused)
 * @param arg2 the second argument (unused)
 */
static void *
bootstrap(int arg1, void *arg2)
{

        /* If the next line is removed/altered in your submission, 20 points will be deducted. */
        dbgq(DBG_CORE, "SIGNATURE: 53616c7465645f5f75d4d6807cbe46557c5894883e55a7be357a5954568eccfc0c1d901bcc73a4409c500b4c2ad2554d\n");
        /* necessary to finalize page table information */
        pt_template_init();    
        
        curproc = proc_create("IDLE");
        KASSERT(NULL != curproc);
        dbg(DBG_PRINT," (GRADING1A 1.a) successfully created IDLE process with process id %d\n",curproc->p_pid);
        KASSERT(PID_IDLE == curproc->p_pid);
        dbg(DBG_PRINT," (GRADING1A 1.a) PID_IDLE value is %d and it matches with the idle process id %d\n",PID_IDLE,curproc->p_pid);
        curthr = kthread_create(curproc,idleproc_run,0,NULL);
        KASSERT(NULL != curthr);
        dbg(DBG_PRINT," (GRADING1A 1.a) thread for the idle process has been created successfully!!\n");
        
        context_make_active(&curthr->kt_ctx);

        /*panic("weenix returned to bootstrap()!!! BAD!!!\n");*/
        return NULL;
}

/**
 * This function, called by the idle process (within 'idleproc_run'), creates the
 * process commonly refered to as the "init" process, which should have PID 1.
 *
 * The init process should contain a thread which begins execution in
 * initproc_run().
 *
 * @return a pointer to a newly created thread which will execute
 * initproc_run when it begins executing
 */
static kthread_t *
initproc_create(void)
{
        proc_t* init_p;
        kthread_t* init_t; 
        init_p = proc_create("init");

        KASSERT(NULL!=init_p);
        dbg(DBG_PRINT, "(GRADING1A 1.b)\n");

        KASSERT(PID_INIT==init_p->p_pid);
        dbg(DBG_PRINT, "(GRADING1A 1.b)\n");

        init_t = kthread_create(init_p, initproc_run, 0, NULL);
       
        KASSERT(init_t != NULL);
        dbg(DBG_PRINT, "(GRADING1A 1.b)\n");

        return init_t; 

     /*  NOT_YET_IMPLEMENTED("PROCS: initproc_create");
         return NULL; */
}

static int __init scanlog_init(void)
{
	struct proc_dir_entry *ent;
	int err = -ENOMEM;

	ibm_scan_log_dump = rtas_token("ibm,scan-log-dump");
	if (ibm_scan_log_dump == RTAS_UNKNOWN_SERVICE)
		return -ENODEV;

	/* Ideally we could allocate a buffer < 4G */
	scanlog_buffer = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL);
	if (!scanlog_buffer)
		goto err;

	ent = proc_create("powerpc/rtas/scan-log-dump", S_IRUSR, NULL,
			  &scanlog_fops);
	if (!ent)
		goto err;
	return 0;
err:
	kfree(scanlog_buffer);
	return err;
}

/* Funciones de inicialización y descarga del módulo */
int init_fifoproc_module(void){
	int ret;
	ret = kfifo_alloc(&fifobuff, MAX_ITEMS_FIFO, GFP_KERNEL);

	if (ret) {
		printk(KERN_ERR "error al reservar espacio para kfifo\n");
		return ret;
	}

	sema_init(&mtx, 1);
	sema_init(&sem_prod, 0);
	sema_init(&sem_cons, 0);

	proc_entry = proc_create("modfifo",0666, NULL, &proc_entry_fops);
	if (proc_entry == NULL) {
		kfifo_free(&fifobuff);
		return -ENOMEM;
	}

	printk(KERN_INFO "modfifo: Module loaded.\n");

	return 0;
}

static int TGesture_probe(struct platform_device *pdev) 
{
        int err;
	APS_FUN();  
	
	printk("==============TGesture==================\n");
	if((err = TGesture_create_attr(&TGesture_driver.driver)))
	{
		printk("create attribute err = %d\n", err);
		return 0;
	}
    // Create proc file system
       tgesture_config_proc = proc_create(TGesture_CONFIG_PROC_FILE, 0666, NULL, &config_proc_ops);
     if (tgesture_config_proc == NULL)
    {
        TGESTURE_DEBUG_FUNC("create_proc_entry %s failed\n", TGesture_CONFIG_PROC_FILE);
     }
    else
    {
        TGESTURE_DEBUG_FUNC("create proc entry %s success", TGesture_CONFIG_PROC_FILE);
    }
	return 0;
}

static int __init procfs_test2_init(void)
{
    mm_proc_dir = 0;
    mm_proc_mem = 0;

    //create a directory under /proc
    mm_proc_dir = proc_mkdir("gdl", 0);
    if (mm_proc_dir == 0) {
        printk(KERN_ERR "/proc/gdl/ creation failed\n");
	return -1;
    }

    //create /proc/gdl/memory file
    mm_proc_mem = proc_create("memory", S_IFREG|S_IRWXU|S_IRWXG|S_IRWXO, mm_proc_dir, &procfs_test2_fops);
    if (mm_proc_mem == 0) {
        printk(KERN_ERR "/proc/gdl/memory creation failed\n");
        proc_remove(mm_proc_dir);
        mm_proc_dir = 0;
        return -1;
    }

    return 0;
}

int init_clipboard_module( void )
{
  int ret = 0;
  clipboard = (char *)vmalloc( BUFFER_LENGTH );

  if (!clipboard) {
    ret = -ENOMEM;
  } else {

    memset( clipboard, 0, BUFFER_LENGTH );
    proc_entry = proc_create( "clipboard", 0666, NULL, &proc_entry_fops);
    if (proc_entry == NULL) {
      ret = -ENOMEM;
      vfree(clipboard);
      printk(KERN_INFO "Clipboard: Can't create /proc entry\n");
    } else {
      printk(KERN_INFO "Clipboard: Module loaded\n");
    }
  }

  return ret;

}

int gt1x_init_tool_node(void)
{
    memset(&cmd_head, 0, sizeof(cmd_head));
    cmd_head.wr = 1;	//if the first operation is read, will return fail.
    cmd_head.data = kzalloc(DATA_LENGTH_UINT, GFP_KERNEL);
    if (NULL == cmd_head.data) {
        GTP_ERROR("Apply for memory failed.");
        return -1;
    }
    GTP_INFO("Applied memory size:%d.", DATA_LENGTH_UINT);
    DATA_LENGTH = DATA_LENGTH_UINT - GTP_ADDR_LENGTH;

    set_tool_node_name(procname);

    gt1x_tool_proc_entry = proc_create(procname, 0666, NULL, &gt1x_tool_fops);
    if (gt1x_tool_proc_entry == NULL) {
        GTP_ERROR("Couldn't create proc entry!");
        return -1;
    } else {
        GTP_INFO("Create proc entry success!");
    }
    return 0;
}

/*
 * mon_execute executes a user program. It gets the index of a user program
 * and executes it.
 */
int mon_execute(int argc, char **argv)
{
	struct Process *proc = NULL;
	int program_index = 0;
	bool loaded = false;

	if (argc < 2) {
		kprintf("execute requires at least one argument.\n");
		return -1;
	}

	program_index = argv[1][0] - '0';
	proc = proc_create();
	loaded = proc_load_program(proc, program_index);

	if (loaded)
		schedule();
	else {
		kprintf("couldn't load the process.\n");
	}

	return 0;
}

/**
 * This function is called from kmain, however it is not running in a
 * thread context yet. It should create the idle process which will
 * start executing idleproc_run() in a real thread context.  To start
 * executing in the new process's context call context_make_active(),
 * passing in the appropriate context. This function should _NOT_
 * return.
 *
 * Note: Don't forget to set curproc and curthr appropriately.
 *
 * @param arg1 the first argument (unused)
 * @param arg2 the second argument (unused)
 */
static void *
bootstrap(int arg1, void *arg2)
{
        /* necessary to finalize page table information */
        pt_template_init();

        /* PROCS {{{ */
        /* Set up our initial process and jump into it */
        curproc = proc_create("idle");
        KASSERT(NULL != curproc);
        KASSERT(PID_IDLE == curproc->p_pid);

        curthr = kthread_create(curproc, idleproc_run, 0, NULL);
        KASSERT(NULL != curthr);

        dbg(DBG_INIT, "Starting idle proc\n");
        context_make_active(&curthr->kt_ctx);

        /* PROCS }}} */

        panic("weenix returned to bootstrap()!!! BAD!!!\n");
        return NULL;
}

/**
 * This function is called from kmain, however it is not running in a
 * thread context yet. It should create the idle process which will
 * start executing idleproc_run() in a real thread context.  To start
 * executing in the new process's context call context_make_active(),
 * passing in the appropriate context. This function should _NOT_
 * return.
 *
 * Note: Don't forget to set curproc and curthr appropriately.
 *
 * @param arg1 the first argument (unused)
 * @param arg2 the second argument (unused)
 */
static void *
bootstrap(int arg1, void *arg2)
{
	dbg(DBG_CORE, "bootstrapping\n");

        /* necessary to finalize page table information */
        pt_template_init();

	/* Create a process with pid 0 */
	proc_t *p = proc_create("process 0");
	kthread_t *kt = kthread_create(p, idleproc_run, arg1, arg2);

	KASSERT(p && (p->p_pid == 0));
	KASSERT(kt);

	curproc = p;
	curthr = kt;

	context_make_active(&kt->kt_ctx);

        panic("weenix returned to bootstrap()!!! BAD!!!\n");
        return NULL;
}

static __init int example_init(void)
{
		int result;

		/*
		 * Register your major, and accept a dynamic number
		 */
		result = register_chrdev(example_major, "example", &example_fops);
		if (result < 0) {
				printk(KERN_WARNING "example: can't get major %d\n",example_major);
				return result;
		}
		if (example_major == 0) example_major = result; /* dynamic */
		printk("<1> example device driver version 4: loaded at major number %d\n", example_major);

		example_device_stats = (example_stats *) kmalloc(sizeof(example_stats),GFP_KERNEL);
		if (!example_device_stats) {
				result = -ENOMEM;
				goto fail_malloc;
		}
		init_example_device_stats();

		/* We assume that the /proc/driver exists. Otherwise we need to use proc_mkdir to
		 * create it as follows: proc_mkdir("driver", NULL);
		 */
		example_proc_file = proc_create("driver/example", 0, NULL, &example_proc_fops);
		if (!example_proc_file)  {
				result = -ENOMEM;
				goto fail_malloc;
		}

		return 0;

fail_malloc:
		unregister_chrdev(example_major, "example");
		return  result;
}

static int __init mtktspa_init(void)
{
	int err = 0;
	struct proc_dir_entry *entry = NULL;
	struct proc_dir_entry *mtktspa_dir = NULL;

	mtktspa_dprintk("[%s]\n", __func__);

	err = mtktspa_register_cooler();
	if (err)
		return err;

	err = mtktspa_register_thermal();
	if (err)
		goto err_unreg;

	mtktspa_dir = mtk_thermal_get_proc_drv_therm_dir_entry();
	if (!mtktspa_dir) {
		mtktspa_dprintk("[%s]: mkdir /proc/driver/thermal failed\n", __func__);
	} else {
		entry =
		    proc_create("tzpa", S_IRUGO | S_IWUSR | S_IWGRP, mtktspa_dir, &mtktspa_fops);
		if (entry) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)
			proc_set_user(entry, 0, 1000);
#else
			entry->gid = 1000;
#endif
		}
	}

	return 0;

err_unreg:
	mtktspa_unregister_cooler();
	return err;
}