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Made changes to have shared tcb parts in fs0 in preparation for clone()

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fs_data and files structures can now be shared in the vfs task.
Currently no means to free shared structures in tcb destruction. Need to add that.
This commit is contained in:
Bahadir Balban
2008-11-09 10:07:24 +02:00
parent 5468c1833d
commit 63fb907cd0
13 changed files with 189 additions and 78 deletions
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31
tasks/fs0/include/task.h
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@@ -10,18 +10,32 @@
#define __TASKNAME__ __VFSNAME__
#define TCB_NO_SHARING 0
#define TCB_SHARED_VM (1 << 0)
#define TCB_SHARED_FILES (1 << 1)
#define TCB_SHARED_FS (1 << 2)
#define TASK_FILES_MAX 32
struct task_fd_head {
int fd[TASK_FILES_MAX];
struct id_pool *fdpool;
int tcb_refs;
};
struct task_fs_data {
struct vnode *curdir;
struct vnode *rootdir;
int tcb_refs;
};
/* Thread control block, fs0 portion */
struct tcb {
l4id_t tid;
unsigned long utcb_address;
int utcb_mapped; /* Set if we mapped their utcb */
struct list_head list;
int fd[TASK_FILES_MAX];
struct id_pool *fdpool;
struct vnode *curdir;
struct vnode *rootdir;
unsigned long utcb_address;
struct task_fd_head *files;
struct task_fs_data *fs_data;
};
/* Structures used when receiving new task info from pager */
@@ -35,11 +49,6 @@ struct task_data_head {
struct task_data tdata[];
};
static inline int task_is_utcb_mapped(struct tcb *t)
{
return t->utcb_mapped;
}
struct tcb *find_task(int tid);
int init_task_data(void);