Changes for restarting disk drivers and new interface between PM and FS.

include/minix/callnr.h

@@ -54,9 +54,12 @@
 #define GETPGRP		  63
 
 /* The following are not system calls, but are processed like them. */
-#define UNPAUSE		  65	/* to MM or FS: check for EINTR */
+#define UNPAUSE		  65	/* to PM or FS: check for EINTR */
+#define EXEC_NEWMEM	  66	/* from FS to PM: new memory map for exec */
 #define REVIVE	 	  67	/* to FS: revive a sleeping process */
 #define TASK_REPLY	  68	/* to FS: reply code from tty task */
+#define FORK_NB		  69	/* to PM: special fork call for RS */
+#define EXEC_RESTART	  70	/* to PM: final part of exec for RS */
 
 /* Posix signal handling. */
 #define SIGACTION	  71

include/minix/com.h

@@ -439,7 +439,9 @@
 #define PR_TRACING     m1_i3	/* flag to indicate tracing is on/ off */
 #define PR_NAME_PTR    m1_p2	/* tells where program name is for dmp */
 #define PR_IP_PTR      m1_p3	/* initial value for ip after exec */
-#define PR_MEM_PTR     m1_p1	/* tells where memory map is for sys_newmap */
+#define PR_MEM_PTR     m1_p1	/* tells where memory map is for sys_newmap
+				 * and sys_fork
+				 */
 
 /* Field names for SYS_INT86 */
 #define INT86_REG86    m1_p1	/* pointer to registers */
@@ -462,6 +464,9 @@
 #define RS_REFRESH	(RS_RQ_BASE + 2)	/* restart system service */
 #define RS_RESCUE	(RS_RQ_BASE + 3)	/* set rescue directory */
 #define RS_SHUTDOWN	(RS_RQ_BASE + 4)	/* alert about shutdown */
+#define RS_UP_COPY	(RS_RQ_BASE + 5)	/* start system service and
+						 * keep the binary in memory
+						 */
 
 #  define RS_CMD_ADDR		m1_p1		/* command string */
 #  define RS_CMD_LEN		m1_i1		/* length of command */
@@ -504,5 +509,78 @@
 #define GET_KMESS	101	/* get kmess from TTY */
 #  define GETKM_PTR	      m1_p1
 
+#define PM_BASE	0x900
+#define PM_GET_WORK	(PM_BASE + 1)	/* Get work from PM */
+#define PM_IDLE		(PM_BASE + 2)	/* PM doesn't have any more work */
+#define PM_BUSY		(PM_BASE + 3)	/* A reply from FS is needed */
+#define PM_STIME	(PM_BASE + 4)	/* Tell FS about the new system time */
+#define		PM_STIME_TIME	m1_i1		/* boottime */
+#define PM_SETSID	(PM_BASE + 5)	/* Tell FS about the session leader */
+#define		PM_SETSID_PROC	m1_i1		/* process */
+#define PM_SETGID	(PM_BASE + 6)	/* Tell FS about the new group IDs */
+#define		PM_SETGID_PROC	m1_i1		/* process */
+#define		PM_SETGID_EGID	m1_i2		/* effective group id */
+#define		PM_SETGID_RGID	m1_i3		/* real group id */
+#define PM_SETUID	(PM_BASE + 7)	/* Tell FS about the new user IDs */
+#define		PM_SETUID_PROC	m1_i1		/* process */
+#define		PM_SETUID_EGID	m1_i2		/* effective user id */
+#define		PM_SETUID_RGID	m1_i3		/* real user id */
+#define PM_FORK		(PM_BASE + 8)	/* Tell FS about the new process */
+#define		PM_FORK_PPROC	m1_i1		/* parent process */
+#define		PM_FORK_CPROC	m1_i2		/* child process */
+#define		PM_FORK_CPID	m1_i3		/* child pid */
+#define PM_EXIT		(PM_BASE + 9)	/* Tell FS about the exiting process */
+#define		PM_EXIT_PROC	m1_i1		/* process */
+#define PM_UNPAUSE	(PM_BASE + 10)	/* interrupted process */
+#define		PM_UNPAUSE_PROC	m1_i1		/* process */
+#define PM_REBOOT	(PM_BASE + 11)	/* Tell FS that we about to reboot */
+#define PM_EXEC		(PM_BASE + 12)	/* Forward exec call to FS */
+#define		PM_EXEC_PROC		m1_i1	/* process */
+#define		PM_EXEC_PATH		m1_p1	/* executable */
+#define		PM_EXEC_PATH_LEN	m1_i2	/* length of path including
+						 * terminating nul
+						 */
+#define		PM_EXEC_FRAME		m1_p2	/* arguments and environment */
+#define		PM_EXEC_FRAME_LEN	m1_i3	/* size of frame */
+#define PM_FORK_NB	(PM_BASE + 13)	/* Tell FS about the fork_nb call */
+#define PM_DUMPCORE	(PM_BASE + 14)	/* Ask FS to generate a core dump */
+#define		PM_CORE_PROC		m1_i1
+#define		PM_CORE_SEGPTR		m1_p1
+#define PM_UNPAUSE_TR	(PM_BASE + 15)	/* interrupted process (for tracing) */
+#define PM_EXIT_TR	(PM_BASE + 16)	/* Tell FS about the exiting process
+					 * (for tracing)
+					 */
+
+/* Replies */
+#define PM_EXIT_REPLY	(PM_BASE + 20)	/* Reply from FS */
+#define PM_REBOOT_REPLY	(PM_BASE + 21)	/* Reply from FS */
+#define PM_EXEC_REPLY	(PM_BASE + 22)	/* Reply from FS */
+		/* PM_EXEC_PROC m1_i1 */
+#define		PM_EXEC_STATUS m1_i2	/* OK or failure */
+#define PM_CORE_REPLY	(PM_BASE + 23)	/* Reply from FS */
+		/* PM_CORE_PROC m1_i1 */
+#define		PM_CORE_STATUS m1_i2	/* OK or failure */
+#define PM_EXIT_REPLY_TR (PM_BASE + 24)	/* Reply from FS */
+
+/* Parameters for the EXEC_NEWMEM call */
+#define EXC_NM_PROC	m1_i1		/* process that needs new map */
+#define EXC_NM_PTR	m1_p1		/* parameters in struct exec_newmem */
+/* Results:
+ * the status will be in m_type.
+ * the top of the stack will be in m1_i1.
+ * the following flags will be in m1_i2:
+ */
+#define EXC_NM_RF_LOAD_TEXT	1	/* Load text segment (otherwise the
+					 * text segment is already present)
+					 */
+#define EXC_NM_RF_ALLOW_SETUID	2	/* Setuid execution is allowed (tells
+					 * FS to update its uid and gid 
+					 * fields.
+					 */
+
+/* Parameters for the EXEC_RESTART call */
+#define EXC_RS_PROC	m1_i1		/* process that needs to be restarted */
+#define EXC_RS_RESULT	m1_i2		/* result of the exec */
+
 
 #endif /* _MINIX_COM_H */ 

include/minix/config.h

@@ -71,7 +71,7 @@
 #define ENABLE_CACHE2      0
 
 /* Enable or disable swapping processes to disk. */
-#define ENABLE_SWAP	   1
+#define ENABLE_SWAP	   0
 
 /* Include or exclude an image of /dev/boot in the boot image. 
  * Please update the makefile in /usr/src/tools/ as well.

include/minix/syslib.h

@@ -29,7 +29,7 @@ _PROTOTYPE( int sys_abort, (int how, ...));
 _PROTOTYPE( int sys_enable_iop, (int proc));
 _PROTOTYPE( int sys_exec, (int proc, char *ptr,  
 				char *aout, vir_bytes initpc));
-_PROTOTYPE( int sys_fork, (int parent, int child, int *));
+_PROTOTYPE( int sys_fork, (int parent, int child, int *, struct mem_map *ptr));
 _PROTOTYPE( int sys_newmap, (int proc, struct mem_map *ptr));
 _PROTOTYPE( int sys_exit, (int proc));
 _PROTOTYPE( int sys_trace, (int req, int proc, long addr, long *data_p));

include/minix/type.h

@@ -147,4 +147,21 @@ struct mem_range
 	phys_bytes mr_limit;	/* Highest memory address in range */
 };
 
+/* For EXEC_NEWMEM */
+struct exec_newmem
+{
+	vir_bytes text_bytes;
+	vir_bytes data_bytes;
+	vir_bytes bss_bytes;
+	vir_bytes tot_bytes;
+	vir_bytes args_bytes;
+	int sep_id;
+	dev_t st_dev;
+	ino_t st_ino;
+	time_t st_ctime;
+	uid_t new_uid;
+	gid_t new_gid;
+	char progname[16];	/* Should be at least PROC_NAME_LEN */
+};
+
 #endif /* _TYPE_H */

include/unistd.h

@@ -186,9 +186,11 @@ _PROTOTYPE( int allocmem, (phys_bytes size, phys_bytes *base)		);
 _PROTOTYPE( int freemem, (phys_bytes size, phys_bytes base)		);
 #define DEV_MAP 1
 #define DEV_UNMAP 2
-#define mapdriver(driver, device, style) devctl(DEV_MAP, driver, device, style)
+#define mapdriver(driver, device, style, force) \
+	devctl(DEV_MAP, driver, device, style, force)
 #define unmapdriver(device) devctl(DEV_UNMAP, 0, device, 0)
-_PROTOTYPE( int devctl, (int ctl_req, int driver, int device, int style));
+_PROTOTYPE( int devctl, (int ctl_req, int driver, int device, int style, 
+	int force)							);
 
 /* For compatibility with other Unix systems */
 _PROTOTYPE( int getpagesize, (void)					);

lib/other/_devctl.c

@@ -3,13 +3,15 @@
 #include <unistd.h>
 
 
-PUBLIC int devctl(int ctl_req, int proc_nr, int dev_nr, int dev_style)
+PUBLIC int devctl(int ctl_req, int proc_nr, int dev_nr, int dev_style,
+	int force)
 {
   message m;
   m.m4_l1 = ctl_req;
   m.m4_l2 = proc_nr;
   m.m4_l3 = dev_nr;
   m.m4_l4 = dev_style;
+  m.m4_l5 = force;
   if (_syscall(FS, DEVCTL, &m) < 0) return(-1);
   return(0);
 }

lib/syslib/sys_fork.c

@@ -1,9 +1,10 @@
 #include "syslib.h"
 
-PUBLIC int sys_fork(parent, child, child_endpoint)
+PUBLIC int sys_fork(parent, child, child_endpoint, map_ptr)
 int parent;			/* process doing the fork */
 int child;			/* which proc has been created by the fork */
 int *child_endpoint;
+struct mem_map *map_ptr;
 {
 /* A process has forked.  Tell the kernel. */
 
@@ -12,6 +13,7 @@ int *child_endpoint;
 
   m.PR_ENDPT = parent;
   m.PR_SLOT = child;
+  m.PR_MEM_PTR = map_ptr;
   r = _taskcall(SYSTASK, SYS_FORK, &m);
   *child_endpoint = m.PR_ENDPT;
   return r;