Ejemplos de GET_INODE_FROM_FILEP en C++ (Cpp)

Ejemplo n.º 1

int android_readwrite_file(const char *filename, char *rbuf,
	const char *wbuf, size_t length)
{
	int ret = 0;
	struct file *filp = (struct file *)-ENOENT;
	mm_segment_t oldfs;
	oldfs = get_fs();
	set_fs(KERNEL_DS);

	do {
		int mode = (wbuf) ? O_RDWR : O_RDONLY;
		filp = filp_open(filename, mode, S_IRUSR);

		if (IS_ERR(filp) || !filp->f_op) {
			ret = -ENOENT;
			break;
		}

		if (length == 0) {
			/* Read the length of the file only */
			struct inode    *inode;

			inode = GET_INODE_FROM_FILEP(filp);
			if (!inode) {
				printk(KERN_ERR
					"android_readwrite_file: Error 2\n");
				ret = -ENOENT;
				break;
			}
			ret = i_size_read(inode->i_mapping->host);
			break;
		}

		if (wbuf) {
			ret = filp->f_op->write(
				filp, wbuf, length, &filp->f_pos);
			if (ret < 0) {
				printk(KERN_ERR
					"android_readwrite_file: Error 3\n");
				break;
			}
		} else {
			ret = filp->f_op->read(
				filp, rbuf, length, &filp->f_pos);
			if (ret < 0) {
				printk(KERN_ERR
					"android_readwrite_file: Error 4\n");
				break;
			}
		}
	} while (0);

	if (!IS_ERR(filp))
		filp_close(filp, NULL);

	set_fs(oldfs);
	printk(KERN_ERR "android_readwrite_file: ret=%d\n", ret);

	return ret;
}

Ejemplo n.º 2

Archivo: ar6000_android.c Proyecto: burstlam/AR6kSDK.3.1

static int android_readwrite_file(const A_CHAR *filename, A_CHAR *rbuf, const A_CHAR *wbuf, size_t length)
{
    int ret = 0;
    struct file *filp = (struct file *)-ENOENT;
    mm_segment_t oldfs;
    oldfs = get_fs();
    set_fs(KERNEL_DS);
    do {
        int mode = (wbuf) ? O_RDWR : O_RDONLY;
        filp = filp_open(filename, mode, S_IRUSR);
        if (IS_ERR(filp) || !filp->f_op) {
            AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("%s: file %s filp_open error\n", __FUNCTION__, filename));
            ret = -ENOENT;
            break;
        }
    
        if (length==0) {
            /* Read the length of the file only */
            struct inode    *inode;

            inode = GET_INODE_FROM_FILEP(filp);
            if (!inode) {
                AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("%s: Get inode from %s failed\n", __FUNCTION__, filename));
                ret = -ENOENT;
                break;
            }
            ret = i_size_read(inode->i_mapping->host);
            break;
        }

        if (wbuf) {
            if ( (ret=filp->f_op->write(filp, wbuf, length, &filp->f_pos)) < 0) {
                AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("%s: Write %u bytes to file %s error %d\n", __FUNCTION__, 
                                length, filename, ret));
                break;
            }
        } else {
            if ( (ret=filp->f_op->read(filp, rbuf, length, &filp->f_pos)) < 0) {
                AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("%s: Read %u bytes from file %s error %d\n", __FUNCTION__,
                                length, filename, ret));
                break;
            }
        }
    } while (0);

    if (!IS_ERR(filp)) {
        filp_close(filp, NULL);
    }
    set_fs(oldfs);

    return ret;
}