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#include <bool.h>
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#include <bool.h>
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#include <errno.h>
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#include <errno.h>
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#include <async.h>
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#include <async.h>
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#include <align.h>
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#include <align.h>
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#include <async.h>
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#include <async.h>
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#include <futex.h>
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#include <fibril_sync.h>
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#include <stdio.h>
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#include <stdio.h>
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#include <devmap.h>
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#include <devmap.h>
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#include <ipc/bd.h>
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#include <ipc/bd.h>
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#define NAME "rd"
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#define NAME "rd"
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static void *rd_addr;
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static void *rd_addr;
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/** Size of the ramdisk. */
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/** Size of the ramdisk. */
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static size_t rd_size;
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static size_t rd_size;
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/**
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/**
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 * This futex protects the ramdisk's data.
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 * This rwlock protects the ramdisk's data.
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 * If we were to serve multiple requests (read + write or several writes)
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 * If we were to serve multiple requests (read + write or several writes)
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 * concurrently (i.e. from two or more threads), each read and write needs to be
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 * concurrently (i.e. from two or more threads), each read and write needs to be
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 * protected by this futex.
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 * protected by this rwlock.
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 */
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 */
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atomic_t rd_futex = FUTEX_INITIALIZER;
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fibril_rwlock_t rd_lock;
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/** Handle one connection to ramdisk.
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/** Handle one connection to ramdisk.
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 *
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 *
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 * @param iid       Hash of the request that opened the connection.
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 * @param iid       Hash of the request that opened the connection.
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 * @param icall     Call data of the request that opened the connection.
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 * @param icall     Call data of the request that opened the connection.
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                 * Reading past the end of the device.
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                 * Reading past the end of the device.
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                 */
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                 */
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                retval = ELIMIT;
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                retval = ELIMIT;
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                break;
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                break;
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            }
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            }
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            futex_down(&rd_futex);
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            fibril_rwlock_read_lock(&rd_lock);
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            memcpy(fs_va, rd_addr + offset * block_size, block_size);
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            memcpy(fs_va, rd_addr + offset * block_size, block_size);
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            futex_up(&rd_futex);
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            fibril_rwlock_read_unlock(&rd_lock);
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            retval = EOK;
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            retval = EOK;
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            break;
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            break;
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        case BD_WRITE_BLOCK:
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        case BD_WRITE_BLOCK:
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            offset = IPC_GET_ARG1(call);
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            offset = IPC_GET_ARG1(call);
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            block_size = IPC_GET_ARG2(call);
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            block_size = IPC_GET_ARG2(call);
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                 * Writing past the end of the device.
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                 * Writing past the end of the device.
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                 */
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                 */
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                retval = ELIMIT;
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                retval = ELIMIT;
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                break;
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                break;
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            }
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            }
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            futex_up(&rd_futex);
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            fibril_rwlock_write_lock(&rd_lock);
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            memcpy(rd_addr + offset * block_size, fs_va, block_size);
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            memcpy(rd_addr + offset * block_size, fs_va, block_size);
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            futex_down(&rd_futex);
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            fibril_rwlock_write_unlock(&rd_lock);
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            retval = EOK;
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            retval = EOK;
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            break;
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            break;
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        default:
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        default:
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            /*
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            /*
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             * The client doesn't speak the same protocol.
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             * The client doesn't speak the same protocol.
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    if (devmap_device_register("initrd", &dev_handle) != EOK) {
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    if (devmap_device_register("initrd", &dev_handle) != EOK) {
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        devmap_hangup_phone(DEVMAP_DRIVER);
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        devmap_hangup_phone(DEVMAP_DRIVER);
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        printf(NAME ": Unable to register device\n");
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        printf(NAME ": Unable to register device\n");
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        return false;
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        return false;
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    }
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    }
-
 
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-
 
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    fibril_rwlock_initialize(&rd_lock);
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    return true;
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    return true;
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}
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}
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int main(int argc, char **argv)
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int main(int argc, char **argv)