Add UNIX Domain Sockets internals to PFS. Contributed by Thomas Cort

servers/pfs/Makefile

@@ -1,10 +1,11 @@
 # Makefile for Pipe File System (PFS)
 PROG=	pfs
 SRCS=	open.c table.c inode.c main.c super.c link.c \
-	buffer.c read.c misc.c utility.c stadir.c
+	buffer.c read.c misc.c utility.c stadir.c \
+	uds.c dev_uds.c
 
-DPADD+=	${LIBSYS}
+DPADD+=	${LIBDRIVER} ${LIBSYS}
-LDADD+=	-lsys
+LDADD+=	-ldriver -lsys
 
 MAN=
 

servers/pfs/const.h

@@ -3,6 +3,11 @@
 
 #define NR_INODES        256 	/* # slots in "in core" inode table */
 
+/* Size of descriptor table for unix domain sockets. This should be 
+ * equal to the maximum number of minor devices (currently 256).
+ */
+#define NR_FDS           256
+
 #define INODE_HASH_LOG2   7     /* 2 based logarithm of the inode hash size */
 #define INODE_HASH_SIZE   ((unsigned long)1<<INODE_HASH_LOG2)
 #define INODE_HASH_MASK   (((unsigned long)1<<INODE_HASH_LOG2)-1)
@@ -31,5 +36,8 @@
 #define FS_BITCHUNK_BITS		(usizeof(bitchunk_t) * CHAR_BIT)
 #define FS_BITS_PER_BLOCK(b)	(FS_BITMAP_CHUNKS(b) * FS_BITCHUNK_BITS)
 
+#define FS_CALL_VEC_SIZE 31
+#define DEV_CALL_VEC_SIZE 25
+
 #endif
 

servers/pfs/fs.h

@@ -15,6 +15,7 @@
 #include <minix/const.h>
 #include <minix/type.h>
 #include <minix/dmap.h>
+#include <minix/vfsif.h>
 #include <limits.h>
 #include <errno.h>
 #include <minix/syslib.h>

servers/pfs/glo.h

@@ -12,10 +12,8 @@
 /* The following variables are used for returning results to the caller. */
 EXTERN int err_code;		/* temporary storage for error number */
 
-EXTERN _PROTOTYPE (int (*fs_call_vec[]), (void) ); /* fs call table */
+EXTERN _PROTOTYPE (int (*fs_call_vec[]), (message *fs_m_in, message *fs_m_out) ); /* fs call table */
-
+EXTERN _PROTOTYPE (int (*dev_call_vec[]), (message *fs_m_in, message *fs_m_out) ); /* dev call table */
-EXTERN message fs_m_in;
-EXTERN message fs_m_out;
 
 EXTERN uid_t caller_uid;
 EXTERN gid_t caller_gid;

servers/pfs/inc.h

@@ -4,8 +4,13 @@
 
 #define VERBOSE		   0	/* display diagnostics */
 
+#include <net/ioctl.h>
+
 #include <ansi.h>
 #include <sys/types.h>
+#include <sys/select.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
 #include <limits.h>
 #include <errno.h>
 #include <signal.h>
@@ -13,6 +18,7 @@
 
 #include <minix/callnr.h>
 #include <minix/config.h>
+#include <minix/dmap.h>
 #include <minix/type.h>
 #include <minix/const.h>
 #include <minix/com.h>

servers/pfs/inode.c

@@ -26,7 +26,7 @@ FORWARD _PROTOTYPE( void unhash_inode, (struct inode * const node) 		);
 /*===========================================================================*
  *				fs_putnode				     *
  *===========================================================================*/
-PUBLIC int fs_putnode()
+PUBLIC int fs_putnode(message *fs_m_in, message *fs_m_out)
 {
 /* Find the inode specified by the request message and decrease its counter.*/
 
@@ -35,15 +35,15 @@ PUBLIC int fs_putnode()
   dev_t dev;
   ino_t inum;
   
-  rip = find_inode( (ino_t) fs_m_in.REQ_INODE_NR);
+  rip = find_inode( (ino_t) fs_m_in->REQ_INODE_NR);
 
   if(!rip) {
 	  printf("%s:%d put_inode: inode #%ld dev: %d not found\n", __FILE__,
-		 __LINE__, fs_m_in.REQ_INODE_NR, (dev_t) fs_m_in.REQ_DEV);
+		 __LINE__, fs_m_in->REQ_INODE_NR, (dev_t) fs_m_in->REQ_DEV);
 	  panic("fs_putnode failed");
   }
 
-  count = fs_m_in.REQ_COUNT;
+  count = fs_m_in->REQ_COUNT;
   if (count <= 0) {
 	printf("%s:%d put_inode: bad value for count: %d\n", __FILE__,
 	       __LINE__, count);

servers/pfs/link.c

@@ -6,18 +6,18 @@
 /*===========================================================================*
  *				fs_ftrunc				     *
  *===========================================================================*/
-PUBLIC int fs_ftrunc(void)
+PUBLIC int fs_ftrunc(message *fs_m_in, message *fs_m_out)
 {
   struct inode *rip;
   off_t start, end;
   ino_t inumb;
   
-  inumb = (ino_t) fs_m_in.REQ_INODE_NR;
+  inumb = (ino_t) fs_m_in->REQ_INODE_NR;
 
   if( (rip = find_inode(inumb)) == NULL) return(EINVAL);
 
-  start = fs_m_in.REQ_TRC_START_LO;
+  start = fs_m_in->REQ_TRC_START_LO;
-  end = fs_m_in.REQ_TRC_END_LO;
+  end = fs_m_in->REQ_TRC_END_LO;
 
   return truncate_inode(rip, start);
 }

servers/pfs/main.c

@@ -6,6 +6,7 @@
 #include <minix/vfsif.h>
 #include "buf.h"
 #include "inode.h"
+#include "uds.h"
 
 FORWARD _PROTOTYPE(void get_work, (message *m_in)			);
 
@@ -23,7 +24,9 @@ PUBLIC int main(int argc, char *argv[])
  * three major activities: getting new work, processing the work, and
  * sending the reply. The loop never terminates, unless a panic occurs.
  */
-  int error, ind;
+  int ind;
+  message pfs_m_in;
+  message pfs_m_out;
 
   /* SEF local startup. */
   env_setargs(argc, argv);
@@ -33,31 +36,36 @@ PUBLIC int main(int argc, char *argv[])
 	endpoint_t src;
 
 	/* Wait for request message. */
-	get_work(&fs_m_in);
+	get_work(&pfs_m_in);
 
-	src = fs_m_in.m_source;
+	src = pfs_m_in.m_source;
-	error = OK;
 	caller_uid = INVAL_UID;	/* To trap errors */
 	caller_gid = INVAL_GID;
-	req_nr = fs_m_in.m_type;
+	req_nr = pfs_m_in.m_type;
 
-	if (req_nr < VFS_BASE) {
+	if (IS_DEV_RQ(req_nr)) {
-		fs_m_in.m_type += VFS_BASE;
+		ind = req_nr - DEV_RQ_BASE;
-		req_nr = fs_m_in.m_type;
+		if (ind < 0 || ind >= DEV_CALL_VEC_SIZE) {
-		printf("PFS: bad request (no VFS_BASE) %d\n", req_nr);
+			printf("pfs: bad DEV request %d\n", req_nr);
-	}
+			pfs_m_out.m_type = EINVAL;
-	ind = req_nr - VFS_BASE;
-
-	if (ind < 0 || ind >= NREQS) {
-		printf("pfs: bad request %d\n", req_nr); 
-		error = EINVAL; 
 		} else {
-		error = (*fs_call_vec[ind])();
+			(*dev_call_vec[ind])(&pfs_m_in, &pfs_m_out);
+		}
+	} else if (IS_VFS_RQ(req_nr)) {
+		ind = req_nr - VFS_BASE;
+		if (ind < 0 || ind >= FS_CALL_VEC_SIZE) {
+			printf("pfs: bad FS request %d\n", req_nr);
+			pfs_m_out.m_type = EINVAL;
+		} else {
+			pfs_m_out.m_type =
+				(*fs_call_vec[ind])(&pfs_m_in, &pfs_m_out);
+		}
+	} else {
+		printf("pfs: bad request %d\n", req_nr);
+		pfs_m_out.m_type = EINVAL;
 	}
 
-	fs_m_out.m_type = error; 
+	reply(src, &pfs_m_out);
-	reply(src, &fs_m_out);
-      
   }
   return(OK);
 }
@@ -98,10 +106,13 @@ PRIVATE int sef_cb_init_fresh(int type, sef_init_info_t *info)
   }
 	
   init_inode_cache();
+  uds_init();
 
   SELF_E = getprocnr();
   buf_pool();
 
+  driver_announce();
+
   return(OK);
 }
 
@@ -122,12 +133,13 @@ PRIVATE void sef_cb_signal_handler(int signo)
 PRIVATE void get_work(m_in)
 message *m_in;				/* pointer to message */
 {
-  int r, srcok = 0;
+  int r, srcok = 0, status;
   endpoint_t src;
 
   do {
-	if ((r = sef_receive(ANY, m_in)) != OK) 	/* wait for message */
+ 	/* wait for a message */
-		panic("sef_receive failed: %d", r);
+	if ((r = sef_receive_status(ANY, m_in, &status)) != OK)
+		panic("sef_receive_status failed: %d", r);
 	src = m_in->m_source;
 
 	if(src == VFS_PROC_NR) {
@@ -148,4 +160,3 @@ message *m_out;                       	/* report result */
   if (OK != send(who, m_out))    /* send the message */
 	printf("PFS(%d) was unable to send reply\n", SELF_E);
 }
-

servers/pfs/misc.c

@@ -4,7 +4,7 @@
 /*===========================================================================*
  *				fs_sync					     *
  *===========================================================================*/
-PUBLIC int fs_sync()
+PUBLIC int fs_sync(message *fs_m_in, message *fs_m_out)
 {
 /* Perform the sync() system call.  No-op on this FS. */
 

servers/pfs/open.c

@@ -8,17 +8,17 @@
 /*===========================================================================*
  *				fs_newnode				     *
  *===========================================================================*/
-PUBLIC int fs_newnode()
+PUBLIC int fs_newnode(message *fs_m_in, message *fs_m_out)
 {
   register int r = OK;
   mode_t bits;
   struct inode *rip;
   dev_t dev;
 
-  caller_uid = (uid_t) fs_m_in.REQ_UID;
+  caller_uid = (uid_t) fs_m_in->REQ_UID;
-  caller_gid = (gid_t) fs_m_in.REQ_GID;
+  caller_gid = (gid_t) fs_m_in->REQ_GID;
-  bits = (mode_t) fs_m_in.REQ_MODE;
+  bits = (mode_t) fs_m_in->REQ_MODE;
-  dev = (dev_t) fs_m_in.REQ_DEV;
+  dev = (dev_t) fs_m_in->REQ_DEV;
 
   /* Try to allocate the inode */
   if( (rip = alloc_inode(dev, bits) ) == NULL) return(err_code);
@@ -40,12 +40,12 @@ PUBLIC int fs_newnode()
 	free_inode(rip);
   } else {
 	/* Fill in the fields of the response message */
-	fs_m_out.RES_INODE_NR = rip->i_num;
+	fs_m_out->RES_INODE_NR = rip->i_num;
-	fs_m_out.RES_MODE = rip->i_mode;
+	fs_m_out->RES_MODE = rip->i_mode;
-	fs_m_out.RES_FILE_SIZE_LO = rip->i_size;
+	fs_m_out->RES_FILE_SIZE_LO = rip->i_size;
-	fs_m_out.RES_UID = rip->i_uid;
+	fs_m_out->RES_UID = rip->i_uid;
-	fs_m_out.RES_GID = rip->i_gid;
+	fs_m_out->RES_GID = rip->i_gid;
-	fs_m_out.RES_DEV = dev;
+	fs_m_out->RES_DEV = dev;
   }
 
   return(r);

servers/pfs/proto.h

@@ -6,6 +6,7 @@
 /* Structs used in prototypes must be declared as such first. */
 struct buf;
 struct inode;
+struct sockaddr_un;
 
 /* buffer.c */
 _PROTOTYPE( struct buf *get_block, (dev_t dev, ino_t inum)		);
@@ -19,7 +20,7 @@ _PROTOTYPE( struct inode *alloc_inode, (dev_t dev, mode_t mode)		);
 _PROTOTYPE( void dup_inode, (struct inode *ip)				);
 _PROTOTYPE( struct inode *find_inode, (ino_t numb)			);
 _PROTOTYPE( void free_inode, (struct inode *rip)			);
-_PROTOTYPE( int fs_putnode, (void)					);
+_PROTOTYPE( int fs_putnode, (message *fs_m_in, message *fs_m_out)	);
 _PROTOTYPE( void init_inode_cache, (void)				);
 _PROTOTYPE( struct inode *get_inode, (dev_t dev, ino_t numb)		);
 _PROTOTYPE( void put_inode, (struct inode *rip)				);
@@ -27,7 +28,7 @@ _PROTOTYPE( void update_times, (struct inode *rip)			);
 _PROTOTYPE( void wipe_inode, (struct inode *rip)			);
 
 /* link.c */
-_PROTOTYPE( int fs_ftrunc, (void)					);
+_PROTOTYPE( int fs_ftrunc, (message *fs_m_in, message *fs_m_out)	);
 _PROTOTYPE( int truncate_inode, (struct inode *rip, off_t newsize)	);
 
 
@@ -35,23 +36,63 @@ _PROTOTYPE( int truncate_inode, (struct inode *rip, off_t newsize)				);
 _PROTOTYPE( void reply, (endpoint_t who, message *m_out)		);
 
 /* misc.c */
-_PROTOTYPE( int fs_sync, (void)						);
+_PROTOTYPE( int fs_sync, (message *fs_m_in, message *fs_m_out)		);
 
 /* open.c */
-_PROTOTYPE( int fs_newnode, (void)					);
+_PROTOTYPE( int fs_newnode, (message *fs_m_in, message *fs_m_out)	);
 
 /* read.c */
-_PROTOTYPE( int fs_readwrite, (void)					);
+_PROTOTYPE( int fs_readwrite, (message *fs_m_in, message *fs_m_out)	);
 
 /* utility.c */
 _PROTOTYPE( time_t clock_time, (void)					);
-_PROTOTYPE( int no_sys, (void)						);
+_PROTOTYPE( int no_sys, (message *pfs_m_in, message *pfs_m_out)		);
 
 /* stadir.c */
-_PROTOTYPE( int fs_stat, (void)						);
+_PROTOTYPE( int fs_stat, (message *fs_m_in, message *fs_m_out)		);
 
 /* super.c */
 _PROTOTYPE( bit_t alloc_bit, (void)					);
 _PROTOTYPE( void free_bit, (bit_t bit_returned)				);
 
+/* dev_uds.c */
+_PROTOTYPE( int uds_open, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int uds_close, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int uds_read, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int uds_write, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int uds_ioctl, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int uds_select, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int uds_status, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int uds_cancel, (message *dev_m_in, message *dev_m_out)	);
+
+/* uds.c */
+_PROTOTYPE( void uds_init, (void)					);
+_PROTOTYPE( int do_accept, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int do_connect, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int do_listen, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int do_socket, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int do_bind, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int do_getsockname, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int do_getpeername, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int do_shutdown, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int do_socketpair, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int do_getsockopt_sotype,
+				(message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int do_getsockopt_peercred,
+				(message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int do_getsockopt_sndbuf,
+				(message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int do_setsockopt_sndbuf,
+				(message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int do_getsockopt_rcvbuf,
+				(message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int do_setsockopt_rcvbuf,
+				(message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int do_sendto, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int do_recvfrom, (message *dev_m_in, message *dev_m_out)	);
+_PROTOTYPE( int perform_connection,
+				(message *dev_m_in, message *dev_m_out, 
+				struct sockaddr_un *addr, int minorx, 
+				int minory)				);
+
 #endif

servers/pfs/read.c

@@ -7,7 +7,7 @@
 /*===========================================================================*
  *				fs_readwrite				     *
  *===========================================================================*/
-PUBLIC int fs_readwrite(void)
+PUBLIC int fs_readwrite(message *fs_m_in, message *fs_m_out)
 {
   int r, rw_flag;
   struct buf *bp;
@@ -20,7 +20,7 @@ PUBLIC int fs_readwrite(void)
 
   r = OK;
   cum_io = 0;
-  inumb = (ino_t) fs_m_in.REQ_INODE_NR;
+  inumb = (ino_t) fs_m_in->REQ_INODE_NR;
 
   /* Find the inode referred */
   if ((rip = find_inode(inumb)) == NULL) return(EINVAL);
@@ -30,10 +30,10 @@ PUBLIC int fs_readwrite(void)
   f_size = rip->i_size;
   
   /* Get the values from the request message */ 
-  rw_flag = (fs_m_in.m_type == REQ_READ ? READING : WRITING);
+  rw_flag = (fs_m_in->m_type == REQ_READ ? READING : WRITING);
-  gid = (cp_grant_id_t) fs_m_in.REQ_GRANT;
+  gid = (cp_grant_id_t) fs_m_in->REQ_GRANT;
-  position = fs_m_in.REQ_SEEK_POS_LO;
+  position = fs_m_in->REQ_SEEK_POS_LO;
-  nrbytes = (unsigned) fs_m_in.REQ_NBYTES;
+  nrbytes = (unsigned) fs_m_in->REQ_NBYTES;
 
   /* We can't read beyond the max file position */
   if (nrbytes > MAX_FILE_POS) return(EFBIG);
@@ -64,7 +64,7 @@ PUBLIC int fs_readwrite(void)
 	cum_io += nrbytes;
   }
 
-  fs_m_out.RES_SEEK_POS_LO = position; /* It might change later and the VFS
+  fs_m_out->RES_SEEK_POS_LO = position; /* It might change later and the VFS
 					   has to know this value */
   
   /* On write, update file size and access time. */
@@ -81,7 +81,7 @@ PUBLIC int fs_readwrite(void)
   bp->b_bytes = position;
   if (rw_flag == READING) rip->i_update |= ATIME;
   if (rw_flag == WRITING) rip->i_update |= CTIME | MTIME;
-  fs_m_out.RES_NBYTES = (size_t) cum_io;
+  fs_m_out->RES_NBYTES = (size_t) cum_io;
   put_inode(rip);
   put_block(rip->i_dev, rip->i_num);
 

servers/pfs/stadir.c

@@ -47,14 +47,14 @@ PRIVATE int stat_inode(
 /*===========================================================================*
  *                             fs_stat					     *
  *===========================================================================*/
-PUBLIC int fs_stat()
+PUBLIC int fs_stat(message *fs_m_in, message *fs_m_out)
 {
   register int r;              /* return value */
   register struct inode *rip;  /* target inode */
 
-  if( (rip = find_inode(fs_m_in.REQ_INODE_NR)) == NULL) return(EINVAL);
+  if( (rip = find_inode(fs_m_in->REQ_INODE_NR)) == NULL) return(EINVAL);
   get_inode(rip->i_dev, rip->i_num);	/* mark inode in use */  
-  r = stat_inode(rip, fs_m_in.m_source, (cp_grant_id_t) fs_m_in.REQ_GRANT);
+  r = stat_inode(rip, fs_m_in->m_source, (cp_grant_id_t) fs_m_in->REQ_GRANT);
   put_inode(rip);			/* release the inode */
   return(r);
 }

servers/pfs/table.c

@@ -8,8 +8,12 @@
 #include "fs.h"
 #include "inode.h"
 #include "buf.h"
+#include "uds.h"
+
+/* File System Handlers (pfs) */
+PUBLIC _PROTOTYPE (int (*fs_call_vec[]),
+				(message *fs_m_in, message *fs_m_out) ) = {
 
-PUBLIC _PROTOTYPE (int (*fs_call_vec[]), (void) ) = {
         no_sys,             /* 0   not used */
         no_sys,             /* 1   */
         fs_putnode,         /* 2   */
@@ -45,3 +49,34 @@ PUBLIC _PROTOTYPE (int (*fs_call_vec[]), (void) ) = {
 	no_sys,             /* 32 */
 };
 
+/* Device Handlers (/dev/uds) */
+PUBLIC _PROTOTYPE (int (*dev_call_vec[]),
+				(message *dev_m_in, message *dev_m_out) ) = {
+
+        uds_cancel,         /* 0   */
+        no_sys,             /* 1   */
+        no_sys,             /* 2   */
+        no_sys,             /* 3   */
+        no_sys,             /* 4   */
+        no_sys,             /* 5   */
+	uds_open,           /* 6   */
+        uds_close,          /* 7   */
+        no_sys,             /* 8   */
+        no_sys,             /* 9   */
+        no_sys,             /* 10  */
+        no_sys,             /* 11  */
+        uds_select,         /* 12  */
+        uds_status,         /* 13  */
+        uds_open,           /* 14  */
+        no_sys,             /* 15  */
+	no_sys,             /* 16  */
+        no_sys,             /* 17  */
+        no_sys,	            /* 18  */
+        no_sys,		    /* 19  */
+        uds_read,	    /* 20  */
+        uds_write,          /* 21  */
+        no_sys,             /* 22  */
+        no_sys,             /* 23  */
+        uds_ioctl,          /* 24  */
+        no_sys,             /* 25  */
+};

servers/pfs/uds.h

@@ -0,0 +1,227 @@
+#ifndef __PFS_UDS_H__
+#define __PFS_UDS_H__
+
+/*
+ * Unix Domain Sockets Implementation (PF_UNIX, PF_LOCAL)
+ *
+ * Also See...
+ *
+ *   dev_uds.c, table.c, uds.c
+ */
+
+#include <sys/types.h>
+#include <sys/un.h>
+
+#include <minix/endpoint.h>
+
+/* max connection backlog for incoming connections */
+#define UDS_SOMAXCONN 64
+
+/* UDS FD state Flags */
+#define UDS_CONNECTING	 0x10
+
+/*
+ * Internal State Information for a socket descriptor.
+ */
+struct uds_fd {
+
+/* Flags */
+
+	enum UDS_STATE {
+		/* This file descriptor is UDS_FREE and can be allocated. */
+		UDS_FREE  = 0,
+
+		/* OR it is UDS_INUSE and can't be allocated. */
+		UDS_INUSE = 1
+
+	/* state is set to UDS_INUSE in uds_open(). state is Set to 
+	 * UDS_FREE in uds_init() and uds_close(). state should be 
+	 * checked prior to all operations.
+	 */
+	} state;
+
+/* Owner Info */
+
+	/* Socket Owner */
+	endpoint_t owner;
+
+	/* endpoint for suspend/resume */
+	endpoint_t endpoint;
+
+/* Pipe Housekeeping */
+
+	/* inode number on PFS -- each descriptor is backed by 1
+	 * PIPE which is allocated in uds_open() and freed in
+	 * uds_close(). Data is sent/written to a peer's PIPE.
+	 * Data is recv/read from this PIPE.
+	 */
+	ino_t inode_nr;
+
+
+	/* position in the PIPE where the data starts */
+	off_t pos;
+
+	/* size of data in the PIPE */
+	size_t size;
+
+	/* control read/write, set by uds_open() and shutdown(2).
+	 * Can be set to S_IRUSR|S_IWUSR, S_IRUSR, S_IWUSR, or 0
+	 * for read and write, read only, write only, or neither.
+	 * default is S_IRUSR|S_IWUSR.
+	 */
+	mode_t mode;
+
+/* Socket Info */
+
+
+	/* socket type - SOCK_STREAM, SOCK_DGRAM, or SOCK_SEQPACKET
+	 * Set by uds_ioctl(NWIOSUDSTYPE). It defaults to -1 in
+	 * uds_open(). Any action on a socket with type -1 besides
+	 * uds_ioctl(NWIOSUDSTYPE) and uds_close() will result in
+	 * an error.
+	 */
+	int type;
+
+	/* queue of pending connections for server sockets.
+	 * connect(2) inserts and accept(2) removes from the queue
+	 */
+	int backlog[UDS_SOMAXCONN];
+
+	/* requested connection backlog size. Set by listen(2)
+	 * Bounds (0 <= backlog_size <= UDS_SOMAXCONN)
+	 * Defaults to UDS_SOMAXCONN which is defined above.
+	 */
+	unsigned char backlog_size;
+
+	/* index of peer in uds_fd_table for connected sockets.
+	 * -1 is used to mean no peer. Assumptions: peer != -1 means 
+	 * connected.
+	 */
+	int peer;
+
+	/* index of child (client sd returned by accept(2))
+	 * -1 is used to mean no child.
+	 */
+	int child;
+
+	/* address -- the address the socket is bound to.
+	 * Assumptions: addr.sun_family == AF_UNIX means its bound.
+	 */
+	struct sockaddr_un addr;
+
+	/* target -- where DGRAMs are sent to on the next uds_write(). */
+	struct sockaddr_un target;
+
+	/* source -- address where DGRAMs are from. used to fill in the
+	 * from address in recvfrom(2) and recvmsg(2).
+	 */
+	struct sockaddr_un source;
+
+	/* Flag (1 or 0) - listening for incoming connections.
+	 * Default to 0. Set to 1 by do_listen()
+	 */
+	int listening;
+
+	/* Holds an errno. This is set when a connected socket is
+	 * closed and we need to pass ECONNRESET on to a suspended
+	 * peer.
+	 */
+	int err;
+
+/* Suspend/Revive Housekeeping */
+
+	
+	/* SUSPEND State Flags */
+	enum UDS_SUSPENDED {
+
+		/* Socket isn't blocked. */
+		UDS_NOT_SUSPENDED     = 0,
+
+		/* Socket is blocked on read(2) waiting for data to read. */
+		UDS_SUSPENDED_READ    = 1,
+
+		/* Socket is blocked on write(2) for space to write data. */
+		UDS_SUSPENDED_WRITE   = 2,
+
+		/* Socket is blocked on connect(2) waiting for the server. */
+		UDS_SUSPENDED_CONNECT = 4,
+
+		/* Socket is blocked on accept(2) waiting for clients. */
+		UDS_SUSPENDED_ACCEPT  = 8
+	} suspended;
+
+	/* Flag (1 or 0) - thing socket was waiting for is ready.
+	 * If 1, then uds_status() will attempt the operation that
+	 * the socket was blocked on.
+	 */
+	int ready_to_revive;
+
+	/* i/o grant, saved for later use by suspended procs */
+	cp_grant_id_t io_gr;
+
+	/* is of i/o grant, saved for later use by suspended procs */
+	size_t io_gr_size;
+
+	/* Save the call number so that uds_cancel() can unwind the
+	 * call properly.
+	 */
+	int call_nr;
+
+	/* Save the IOCTL so uds_cancel() knows what got cancelled. */
+	int ioctl;
+
+	/* Flag (1 or 0) - the system call completed.
+	 * A doc I read said DEV_CANCEL might be called even though
+	 * the operation is finished. We use this variable to
+	 * determine if we should rollback the changes or not.
+	 */
+	int syscall_done;
+
+/* select() */
+
+	/* Flag (1 or 0) - the process blocked on select(2). When
+	 * selecting is 1 and I/O happens on this socket, then
+	 * select_proc should be notified.
+	 */
+	int selecting;
+
+	/* when a select is in progress, we notify() this endpoint
+	 * of new data.
+	 */
+	endpoint_t select_proc;
+
+	/* Options (SEL_RD, SEL_WR, SEL_ERR) that are requested. */
+	int sel_ops_in;
+
+	/* Options that are available for this socket. */
+	int sel_ops_out;
+
+	/* Flag (1 or 0) to be set to one before calling notify().
+	 * uds_status() will use the flag to locate this descriptor.
+	 */
+	int status_updated;
+};
+
+typedef struct uds_fd uds_fd_t;
+
+/* File Descriptor Table -- Defined in uds.c */
+EXTERN uds_fd_t uds_fd_table[NR_FDS];
+
+/*
+ * Take message m and get the index in uds_fd_table.
+ */
+#define uds_minor(m)	(minor((dev_t) m->DEVICE) & BYTE)
+
+/*
+ * Fill in a reply message.
+ */
+#define uds_set_reply(msg,type,endpoint,io_gr,status)	\
+	do {						\
+		msg->m_type = type;			\
+		msg->REP_ENDPT = endpoint;		\
+		msg->REP_IO_GRANT = io_gr;		\
+		msg->REP_STATUS = status;		\
+	} while (0)
+
+
+#endif

servers/pfs/utility.c

@@ -4,10 +4,10 @@
 /*===========================================================================*
  *				no_sys					     *
  *===========================================================================*/
-PUBLIC int no_sys()
+PUBLIC int no_sys(message *pfs_m_in, message *pfs_m_out)
 {
 /* Somebody has used an illegal system call number */
-  printf("no_sys: invalid call %d\n", req_nr);
+  printf("no_sys: invalid call 0x%x to pfs\n", req_nr);
   return(EINVAL);
 }