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Added sys_close and sys_fsync

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Untested.
This commit is contained in:
Bahadir Balban
2008-05-23 03:59:18 +00:00
parent 00b47117b0
commit 6be310f460
8 changed files with 148 additions and 21 deletions
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1
tasks/fs0/include/syscalls.h
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@@ -19,6 +19,7 @@ int pager_sys_read(l4id_t sender, unsigned long vnum, unsigned long f_offset,
int pager_sys_write(l4id_t sender, unsigned long vnum, unsigned long f_offset,
unsigned long npages, void *pagebuf);
int pager_sys_close(l4id_t sender, l4id_t closer, int fd);
int pager_update_stats(l4id_t sender, unsigned long vnum,
unsigned long newsize);
#endif /* __FS0_SYSCALLS_H__ */

3
tasks/fs0/main.c
View File

@@ -92,6 +92,9 @@ void handle_fs_requests(void)
pager_sys_write(sender, (unsigned long)mr[0], (unsigned long)mr[1],
(unsigned long)mr[2], (void *)mr[3]);
break;
case L4_IPC_TAG_PAGER_CLOSE:
pager_sys_close(sender, (l4id_t)mr[0], (int)mr[1]);
break;
case L4_IPC_TAG_PAGER_UPDATE_STATS:
pager_update_stats(sender, (unsigned long)mr[0],
(unsigned long)mr[1]);

24
tasks/fs0/src/syscalls.c
View File

@@ -93,6 +93,30 @@ struct vnode *vfs_create(struct tcb *task, struct pathdata *pdata,
return newnode;
}
/* Pager notifies vfs about a closed file descriptor.
*
* FIXME: fsync + close could be done under a single "close" ipc
* from pager. Currently there are 2 ipcs: 1 fsync + 1 fd close.
*/
int pager_sys_close(l4id_t sender, l4id_t closer, int fd)
{
struct tcb *task;
int err;
BUG_ON(!(task = find_task(sender)));
if ((err = id_del(task->fdpool, task->fd[fd])) < 0) {
printf("%s: Error releasing fd identifier.\n",
__FUNCTION__);
l4_ipc_return(err);
return 0;
}
task->fd[fd] = -1;
l4_ipc_return(0);
return 0;
}
/* FIXME:
* - Is it already open?
* - Allocate a copy of path string since lookup destroys it