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Bahadir Balban
2008-01-13 13:53:52 +00:00
commit e2b791a3d8
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82
tasks/fs0/main.c Normal file
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/*
* FS0. Filesystem implementation
*
* Copyright (C) 2007 Bahadir Balban
*/
#include <stdio.h>
#include <string.h>
#include <l4lib/arch/message.h>
#include <l4lib/arch/syscalls.h>
#include <l4lib/kip.h>
#include <l4lib/utcb.h>
#include <l4lib/ipcdefs.h>
#include <fs.h>
/* Synchronise with pager via a `wait' tagged ipc with destination as pager */
void wait_pager(l4id_t partner)
{
u32 tag = L4_IPC_TAG_WAIT;
printf("Going to wait till pager finishes dumping.\n");
l4_ipc(partner, l4_nilthread, tag);
printf("Pager synced with us.\n");
}
void fs_request_handler(struct fs_request *fsreq)
{
}
void handle_fs_requests(void)
{
u32 mr[MR_UNUSED_TOTAL];
l4id_t sender;
int err;
u32 tag;
printf("%s: Listening requests.\n", __TASKNAME__);
if ((err = l4_receive(L4_ANYTHREAD)) < 0) {
printf("%s: %s: IPC Error: %d. Quitting...\n", __TASKNAME__,
__FUNCTION__, err);
BUG();
}
/* Read conventional ipc data */
tag = l4_get_tag();
sender = l4_get_sender();
/* Read mrs not used by syslib */
for (int i = 0; i < MR_UNUSED_TOTAL; i++)
mr[i] = read_mr(i);
switch(tag) {
case L4_IPC_TAG_WAIT:
printf("%s: Synced with waiting thread.\n", __TASKNAME__);
break;
case L4_IPC_TAG_OPEN:
sys_open(sender, (void *)mr[0], (int)mr[1], (u32)mr[2]);
break;
case L4_IPC_TAG_READ:
sys_read(sender, (int)mr[0], (void *)mr[1], (int)mr[2]);
break;
case L4_IPC_TAG_WRITE:
sys_write(sender, (int)mr[0], (void *)mr[1], (int)mr[2]);
break;
case L4_IPC_TAG_LSEEK:
sys_lseek(sender, (int)mr[0], (int)mr[1], (int)mr[2]);
break;
default:
printf("%s: Unrecognised ipc tag (%d)"
"received. Ignoring.\n", __TASKNAME__, mr[MR_TAG]);
}
}
void main(void)
{
wait_pager(PAGER_TID);
while (1) {
handle_fs_requests();
}
}