sanchayanmaity/minix
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity
minix/include/minix/ipc.h
Ben Gras 49eb1f4806 vm: new secondary cache code 
Primary purpose of change: to support the mmap implementation, VM must
know both (a) about some block metadata for FS cache blocks, i.e.
inode numbers and inode offsets where applicable; and (b) know about
*all* cache blocks, i.e.  also of the FS primary caches and not just
the blocks that spill into the secondary one. This changes the
interface and VM data structures.

This change is only for the interface (libminixfs) and VM data
structures; the filesystem code is unmodified, so although the
secondary cache will be used as normal, blocks will not be annotated
with inode information until the FS is modified to provide this
information. Until it is modified, mmap of files will fail gracefully
on such filesystems.

This is indicated to VFS/VM by returning ENOSYS for REQ_PEEK.

Change-Id: I1d2df6c485e6c5e89eb28d9055076cc02629594e
2013-04-24 10:18:16 +00:00

249 lines
6.9 KiB
C
Raw Blame History

#ifndef _IPC_H
#define _IPC_H
#include <minix/ipcconst.h>
#include <minix/type.h>
#include <minix/const.h>
/*==========================================================================*
* Types relating to messages. *
*==========================================================================*/
#define M1 1
#define M3 3
#define M4 4
#define M3_STRING 14 /* legacy m3_ca1 size (must not be changed) */
#define M3_LONG_STRING 16 /* current m3_ca1 size (may be increased) */
typedef struct {int m1i1, m1i2, m1i3; char *m1p1, *m1p2, *m1p3;} mess_1;
typedef struct {int m2i1, m2i2, m2i3; long m2l1, m2l2; char *m2p1;
short m2s1;} mess_2;
typedef struct {int m3i1, m3i2; char *m3p1; char m3ca1[M3_LONG_STRING];} mess_3;
typedef struct {long m4l1, m4l2, m4l3, m4l4, m4l5;} mess_4;
typedef struct {short m5s1, m5s2; int m5i1, m5i2; long m5l1, m5l2, m5l3;}mess_5;
typedef struct {long m6l1, m6l2, m6l3; short m6s1, m6s2, m6s3; char m6c1, m6c2;
char *m6p1, *m6p2;} mess_6;
typedef struct {int m7i1, m7i2, m7i3, m7i4, m7i5; char *m7p1, *m7p2;} mess_7;
typedef struct {int m8i1, m8i2; char *m8p1, *m8p2, *m8p3, *m8p4;} mess_8;
typedef struct {long m9l1, m9l2, m9l3, m9l4, m9l5;
short m9s1, m9s2, m9s3, m9s4; } mess_9;
typedef struct {int m10i1, m10i2, m10i3, m10i4;
long m10l1, m10l2, m10l3; } mess_10;
typedef struct {
void *block;
u32_t dev_offset_pages;
u32_t ino_offset_pages;
u32_t ino;
u32_t *flags_ptr;
u32_t dev;
u8_t pages;
u8_t flags;
} mess_vmmcp __packed;
typedef struct {
endpoint_t who;
u32_t offset;
u32_t dev;
u32_t ino;
u32_t vaddr;
u32_t len;
u16_t fd;
u16_t clearend_and_flags; /* low 12 bits are clearend, rest flags */
} mess_vm_vfs_mmap __packed;
typedef struct { u8_t flags; void *addr; } mess_vmmcp_reply __packed;
typedef struct {
endpoint_t m_source; /* who sent the message */
int m_type; /* what kind of message is it */
union {
mess_1 m_m1;
mess_2 m_m2;
mess_3 m_m3;
mess_4 m_m4;
mess_5 m_m5;
mess_7 m_m7;
mess_8 m_m8;
mess_6 m_m6;
mess_9 m_m9;
mess_10 m_m10;
mess_vmmcp m_vmmcp;
mess_vmmcp_reply m_vmmcp_reply;
mess_vm_vfs_mmap m_vm_vfs;
} m_u;
} message __aligned(16);
/* The following defines provide names for useful members. */
#define m1_i1 m_u.m_m1.m1i1
#define m1_i2 m_u.m_m1.m1i2
#define m1_i3 m_u.m_m1.m1i3
#define m1_p1 m_u.m_m1.m1p1
#define m1_p2 m_u.m_m1.m1p2
#define m1_p3 m_u.m_m1.m1p3
#define m2_i1 m_u.m_m2.m2i1
#define m2_i2 m_u.m_m2.m2i2
#define m2_i3 m_u.m_m2.m2i3
#define m2_l1 m_u.m_m2.m2l1
#define m2_l2 m_u.m_m2.m2l2
#define m2_p1 m_u.m_m2.m2p1
#define m2_s1 m_u.m_m2.m2s1
#define m3_i1 m_u.m_m3.m3i1
#define m3_i2 m_u.m_m3.m3i2
#define m3_p1 m_u.m_m3.m3p1
#define m3_ca1 m_u.m_m3.m3ca1
#define m4_l1 m_u.m_m4.m4l1
#define m4_l2 m_u.m_m4.m4l2
#define m4_l3 m_u.m_m4.m4l3
#define m4_l4 m_u.m_m4.m4l4
#define m4_l5 m_u.m_m4.m4l5
#define m5_s1 m_u.m_m5.m5s1
#define m5_s2 m_u.m_m5.m5s2
#define m5_i1 m_u.m_m5.m5i1
#define m5_i2 m_u.m_m5.m5i2
#define m5_l1 m_u.m_m5.m5l1
#define m5_l2 m_u.m_m5.m5l2
#define m5_l3 m_u.m_m5.m5l3
#define m6_l1 m_u.m_m6.m6l1
#define m6_l2 m_u.m_m6.m6l2
#define m6_l3 m_u.m_m6.m6l3
#define m6_s1 m_u.m_m6.m6s1
#define m6_s2 m_u.m_m6.m6s2
#define m6_s3 m_u.m_m6.m6s3
#define m6_c1 m_u.m_m6.m6c1
#define m6_c2 m_u.m_m6.m6c2
#define m6_p1 m_u.m_m6.m6p1
#define m6_p2 m_u.m_m6.m6p2
#define m7_i1 m_u.m_m7.m7i1
#define m7_i2 m_u.m_m7.m7i2
#define m7_i3 m_u.m_m7.m7i3
#define m7_i4 m_u.m_m7.m7i4
#define m7_i5 m_u.m_m7.m7i5
#define m7_p1 m_u.m_m7.m7p1
#define m7_p2 m_u.m_m7.m7p2
#define m8_i1 m_u.m_m8.m8i1
#define m8_i2 m_u.m_m8.m8i2
#define m8_p1 m_u.m_m8.m8p1
#define m8_p2 m_u.m_m8.m8p2
#define m8_p3 m_u.m_m8.m8p3
#define m8_p4 m_u.m_m8.m8p4
#define m9_l1 m_u.m_m9.m9l1
#define m9_l2 m_u.m_m9.m9l2
#define m9_l3 m_u.m_m9.m9l3
#define m9_l4 m_u.m_m9.m9l4
#define m9_l5 m_u.m_m9.m9l5
#define m9_s1 m_u.m_m9.m9s1
#define m9_s2 m_u.m_m9.m9s2
#define m9_s3 m_u.m_m9.m9s3
#define m9_s4 m_u.m_m9.m9s4
#define m10_i1 m_u.m_m10.m10i1
#define m10_i2 m_u.m_m10.m10i2
#define m10_i3 m_u.m_m10.m10i3
#define m10_i4 m_u.m_m10.m10i4
#define m10_l1 m_u.m_m10.m10l1
#define m10_l2 m_u.m_m10.m10l2
#define m10_l3 m_u.m_m10.m10l3
/*==========================================================================*
* Minix run-time system (IPC). *
*==========================================================================*/
/* Datastructure for asynchronous sends */
typedef struct asynmsg
{
unsigned flags;
endpoint_t dst;
int result;
message msg;
} asynmsg_t;
/* Defines for flags field */
#define AMF_EMPTY 000 /* slot is not inuse */
#define AMF_VALID 001 /* slot contains message */
#define AMF_DONE 002 /* Kernel has processed the message. The
* result is stored in 'result'
*/
#define AMF_NOTIFY 004 /* Send a notification when AMF_DONE is set */
#define AMF_NOREPLY 010 /* Not a reply message for a SENDREC */
#define AMF_NOTIFY_ERR 020 /* Send a notification when AMF_DONE is set and
* delivery of the message failed */
int _send_orig(endpoint_t dest, message *m_ptr);
int _receive_orig(endpoint_t src, message *m_ptr, int *status_ptr);
int _sendrec_orig(endpoint_t src_dest, message *m_ptr);
int _sendnb_orig(endpoint_t dest, message *m_ptr);
int _notify_orig(endpoint_t dest);
int _senda_orig(asynmsg_t *table, size_t count);
int _do_kernel_call_orig(message *m_ptr);
int _minix_kernel_info_struct(struct minix_kerninfo **);
/* Hide names to avoid name space pollution. */
#define notify _notify
#define sendrec _sendrec
#define receive _receive
#define receivenb _receivenb
#define send _send
#define sendnb _sendnb
#define senda _senda
struct minix_ipcvecs {
int (*send)(endpoint_t dest, message *m_ptr);
int (*receive)(endpoint_t src, message *m_ptr, int *st);
int (*sendrec)(endpoint_t src_dest, message *m_ptr);
int (*sendnb)(endpoint_t dest, message *m_ptr);
int (*notify)(endpoint_t dest);
int (*do_kernel_call)(message *m_ptr);
int (*senda)(asynmsg_t *table, size_t count);
};
/* kernel-set IPC vectors retrieved by a constructor in libc/sys-minix/init.c */
extern struct minix_ipcvecs _minix_ipcvecs;
static inline int _send(endpoint_t dest, message *m_ptr)
{
return _minix_ipcvecs.send(dest, m_ptr);
}
static inline int _receive(endpoint_t src, message *m_ptr, int *st)
{
return _minix_ipcvecs.receive(src, m_ptr, st);
}
static inline int _sendrec(endpoint_t src_dest, message *m_ptr)
{
return _minix_ipcvecs.sendrec(src_dest, m_ptr);
}
static inline int _sendnb(endpoint_t dest, message *m_ptr)
{
return _minix_ipcvecs.send(dest, m_ptr);
}
static inline int _notify(endpoint_t dest)
{
return _minix_ipcvecs.notify(dest);
}
static inline int do_kernel_call(message *m_ptr)
{
return _minix_ipcvecs.do_kernel_call(m_ptr);
}
static inline int _senda(asynmsg_t *table, size_t count)
{
return _minix_ipcvecs.senda(table, count);
}
#endif /* _IPC_H */
Reference in a new issue View git blame Copy permalink